| 1 | /* Utility and Unix shadow routines for GNU Emacs on the Microsoft Windows API. |
| 2 | Copyright (C) 1994-1995, 2000-2012 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GNU Emacs. |
| 5 | |
| 6 | GNU Emacs is free software: you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation, either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | GNU Emacs is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | /* |
| 20 | Geoff Voelker (voelker@cs.washington.edu) 7-29-94 |
| 21 | */ |
| 22 | #include <stddef.h> /* for offsetof */ |
| 23 | #include <stdlib.h> |
| 24 | #include <stdio.h> |
| 25 | #include <float.h> /* for DBL_EPSILON */ |
| 26 | #include <io.h> |
| 27 | #include <errno.h> |
| 28 | #include <fcntl.h> |
| 29 | #include <ctype.h> |
| 30 | #include <signal.h> |
| 31 | #include <sys/file.h> |
| 32 | #include <sys/time.h> |
| 33 | #include <sys/utime.h> |
| 34 | #include <mbstring.h> /* for _mbspbrk */ |
| 35 | #include <math.h> |
| 36 | #include <time.h> |
| 37 | |
| 38 | /* must include CRT headers *before* config.h */ |
| 39 | |
| 40 | #include <config.h> |
| 41 | |
| 42 | #undef access |
| 43 | #undef chdir |
| 44 | #undef chmod |
| 45 | #undef creat |
| 46 | #undef ctime |
| 47 | #undef fopen |
| 48 | #undef link |
| 49 | #undef mkdir |
| 50 | #undef mktemp |
| 51 | #undef open |
| 52 | #undef rename |
| 53 | #undef rmdir |
| 54 | #undef unlink |
| 55 | |
| 56 | #undef close |
| 57 | #undef dup |
| 58 | #undef dup2 |
| 59 | #undef pipe |
| 60 | #undef read |
| 61 | #undef write |
| 62 | |
| 63 | #undef strerror |
| 64 | |
| 65 | #undef localtime |
| 66 | |
| 67 | #include "lisp.h" |
| 68 | |
| 69 | #include <pwd.h> |
| 70 | #include <grp.h> |
| 71 | |
| 72 | #ifdef __GNUC__ |
| 73 | #define _ANONYMOUS_UNION |
| 74 | #define _ANONYMOUS_STRUCT |
| 75 | #endif |
| 76 | #include <windows.h> |
| 77 | /* Some versions of compiler define MEMORYSTATUSEX, some don't, so we |
| 78 | use a different name to avoid compilation problems. */ |
| 79 | typedef struct _MEMORY_STATUS_EX { |
| 80 | DWORD dwLength; |
| 81 | DWORD dwMemoryLoad; |
| 82 | DWORDLONG ullTotalPhys; |
| 83 | DWORDLONG ullAvailPhys; |
| 84 | DWORDLONG ullTotalPageFile; |
| 85 | DWORDLONG ullAvailPageFile; |
| 86 | DWORDLONG ullTotalVirtual; |
| 87 | DWORDLONG ullAvailVirtual; |
| 88 | DWORDLONG ullAvailExtendedVirtual; |
| 89 | } MEMORY_STATUS_EX,*LPMEMORY_STATUS_EX; |
| 90 | |
| 91 | #include <lmcons.h> |
| 92 | #include <shlobj.h> |
| 93 | |
| 94 | #include <tlhelp32.h> |
| 95 | #include <psapi.h> |
| 96 | #ifndef _MSC_VER |
| 97 | #include <w32api.h> |
| 98 | #endif |
| 99 | #if !defined (__MINGW32__) || __W32API_MAJOR_VERSION < 3 || (__W32API_MAJOR_VERSION == 3 && __W32API_MINOR_VERSION < 15) |
| 100 | /* This either is not in psapi.h or guarded by higher value of |
| 101 | _WIN32_WINNT than what we use. w32api supplied with MinGW 3.15 |
| 102 | defines it in psapi.h */ |
| 103 | typedef struct _PROCESS_MEMORY_COUNTERS_EX { |
| 104 | DWORD cb; |
| 105 | DWORD PageFaultCount; |
| 106 | DWORD PeakWorkingSetSize; |
| 107 | DWORD WorkingSetSize; |
| 108 | DWORD QuotaPeakPagedPoolUsage; |
| 109 | DWORD QuotaPagedPoolUsage; |
| 110 | DWORD QuotaPeakNonPagedPoolUsage; |
| 111 | DWORD QuotaNonPagedPoolUsage; |
| 112 | DWORD PagefileUsage; |
| 113 | DWORD PeakPagefileUsage; |
| 114 | DWORD PrivateUsage; |
| 115 | } PROCESS_MEMORY_COUNTERS_EX,*PPROCESS_MEMORY_COUNTERS_EX; |
| 116 | #endif |
| 117 | |
| 118 | #include <winioctl.h> |
| 119 | #include <aclapi.h> |
| 120 | |
| 121 | #ifdef _MSC_VER |
| 122 | /* MSVC doesn't provide the definition of REPARSE_DATA_BUFFER, except |
| 123 | on ntifs.h, which cannot be included because it triggers conflicts |
| 124 | with other Windows API headers. So we define it here by hand. */ |
| 125 | |
| 126 | typedef struct _REPARSE_DATA_BUFFER { |
| 127 | ULONG ReparseTag; |
| 128 | USHORT ReparseDataLength; |
| 129 | USHORT Reserved; |
| 130 | union { |
| 131 | struct { |
| 132 | USHORT SubstituteNameOffset; |
| 133 | USHORT SubstituteNameLength; |
| 134 | USHORT PrintNameOffset; |
| 135 | USHORT PrintNameLength; |
| 136 | ULONG Flags; |
| 137 | WCHAR PathBuffer[1]; |
| 138 | } SymbolicLinkReparseBuffer; |
| 139 | struct { |
| 140 | USHORT SubstituteNameOffset; |
| 141 | USHORT SubstituteNameLength; |
| 142 | USHORT PrintNameOffset; |
| 143 | USHORT PrintNameLength; |
| 144 | WCHAR PathBuffer[1]; |
| 145 | } MountPointReparseBuffer; |
| 146 | struct { |
| 147 | UCHAR DataBuffer[1]; |
| 148 | } GenericReparseBuffer; |
| 149 | } DUMMYUNIONNAME; |
| 150 | } REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER; |
| 151 | |
| 152 | #endif |
| 153 | |
| 154 | /* TCP connection support. */ |
| 155 | #include <sys/socket.h> |
| 156 | #undef socket |
| 157 | #undef bind |
| 158 | #undef connect |
| 159 | #undef htons |
| 160 | #undef ntohs |
| 161 | #undef inet_addr |
| 162 | #undef gethostname |
| 163 | #undef gethostbyname |
| 164 | #undef getservbyname |
| 165 | #undef getpeername |
| 166 | #undef shutdown |
| 167 | #undef setsockopt |
| 168 | #undef listen |
| 169 | #undef getsockname |
| 170 | #undef accept |
| 171 | #undef recvfrom |
| 172 | #undef sendto |
| 173 | |
| 174 | #include "w32.h" |
| 175 | #include "ndir.h" |
| 176 | #include "w32heap.h" |
| 177 | #include "systime.h" |
| 178 | #include "dispextern.h" /* for xstrcasecmp */ |
| 179 | #include "coding.h" /* for Vlocale_coding_system */ |
| 180 | |
| 181 | #include "careadlinkat.h" |
| 182 | #include "allocator.h" |
| 183 | |
| 184 | /* For serial_configure and serial_open. */ |
| 185 | #include "process.h" |
| 186 | |
| 187 | typedef HRESULT (WINAPI * ShGetFolderPath_fn) |
| 188 | (IN HWND, IN int, IN HANDLE, IN DWORD, OUT char *); |
| 189 | |
| 190 | Lisp_Object QCloaded_from; |
| 191 | |
| 192 | void globals_of_w32 (void); |
| 193 | static DWORD get_rid (PSID); |
| 194 | static int is_symlink (const char *); |
| 195 | static char * chase_symlinks (const char *); |
| 196 | static int enable_privilege (LPCTSTR, BOOL, TOKEN_PRIVILEGES *); |
| 197 | static int restore_privilege (TOKEN_PRIVILEGES *); |
| 198 | static BOOL WINAPI revert_to_self (void); |
| 199 | |
| 200 | \f |
| 201 | /* Initialization states. |
| 202 | |
| 203 | WARNING: If you add any more such variables for additional APIs, |
| 204 | you MUST add initialization for them to globals_of_w32 |
| 205 | below. This is because these variables might get set |
| 206 | to non-NULL values during dumping, but the dumped Emacs |
| 207 | cannot reuse those values, because it could be run on a |
| 208 | different version of the OS, where API addresses are |
| 209 | different. */ |
| 210 | static BOOL g_b_init_is_windows_9x; |
| 211 | static BOOL g_b_init_open_process_token; |
| 212 | static BOOL g_b_init_get_token_information; |
| 213 | static BOOL g_b_init_lookup_account_sid; |
| 214 | static BOOL g_b_init_get_sid_sub_authority; |
| 215 | static BOOL g_b_init_get_sid_sub_authority_count; |
| 216 | static BOOL g_b_init_get_security_info; |
| 217 | static BOOL g_b_init_get_file_security; |
| 218 | static BOOL g_b_init_get_security_descriptor_owner; |
| 219 | static BOOL g_b_init_get_security_descriptor_group; |
| 220 | static BOOL g_b_init_is_valid_sid; |
| 221 | static BOOL g_b_init_create_toolhelp32_snapshot; |
| 222 | static BOOL g_b_init_process32_first; |
| 223 | static BOOL g_b_init_process32_next; |
| 224 | static BOOL g_b_init_open_thread_token; |
| 225 | static BOOL g_b_init_impersonate_self; |
| 226 | static BOOL g_b_init_revert_to_self; |
| 227 | static BOOL g_b_init_get_process_memory_info; |
| 228 | static BOOL g_b_init_get_process_working_set_size; |
| 229 | static BOOL g_b_init_global_memory_status; |
| 230 | static BOOL g_b_init_global_memory_status_ex; |
| 231 | static BOOL g_b_init_get_length_sid; |
| 232 | static BOOL g_b_init_equal_sid; |
| 233 | static BOOL g_b_init_copy_sid; |
| 234 | static BOOL g_b_init_get_native_system_info; |
| 235 | static BOOL g_b_init_get_system_times; |
| 236 | static BOOL g_b_init_create_symbolic_link; |
| 237 | |
| 238 | /* |
| 239 | BEGIN: Wrapper functions around OpenProcessToken |
| 240 | and other functions in advapi32.dll that are only |
| 241 | supported in Windows NT / 2k / XP |
| 242 | */ |
| 243 | /* ** Function pointer typedefs ** */ |
| 244 | typedef BOOL (WINAPI * OpenProcessToken_Proc) ( |
| 245 | HANDLE ProcessHandle, |
| 246 | DWORD DesiredAccess, |
| 247 | PHANDLE TokenHandle); |
| 248 | typedef BOOL (WINAPI * GetTokenInformation_Proc) ( |
| 249 | HANDLE TokenHandle, |
| 250 | TOKEN_INFORMATION_CLASS TokenInformationClass, |
| 251 | LPVOID TokenInformation, |
| 252 | DWORD TokenInformationLength, |
| 253 | PDWORD ReturnLength); |
| 254 | typedef BOOL (WINAPI * GetProcessTimes_Proc) ( |
| 255 | HANDLE process_handle, |
| 256 | LPFILETIME creation_time, |
| 257 | LPFILETIME exit_time, |
| 258 | LPFILETIME kernel_time, |
| 259 | LPFILETIME user_time); |
| 260 | |
| 261 | GetProcessTimes_Proc get_process_times_fn = NULL; |
| 262 | |
| 263 | #ifdef _UNICODE |
| 264 | const char * const LookupAccountSid_Name = "LookupAccountSidW"; |
| 265 | const char * const GetFileSecurity_Name = "GetFileSecurityW"; |
| 266 | #else |
| 267 | const char * const LookupAccountSid_Name = "LookupAccountSidA"; |
| 268 | const char * const GetFileSecurity_Name = "GetFileSecurityA"; |
| 269 | #endif |
| 270 | typedef BOOL (WINAPI * LookupAccountSid_Proc) ( |
| 271 | LPCTSTR lpSystemName, |
| 272 | PSID Sid, |
| 273 | LPTSTR Name, |
| 274 | LPDWORD cbName, |
| 275 | LPTSTR DomainName, |
| 276 | LPDWORD cbDomainName, |
| 277 | PSID_NAME_USE peUse); |
| 278 | typedef PDWORD (WINAPI * GetSidSubAuthority_Proc) ( |
| 279 | PSID pSid, |
| 280 | DWORD n); |
| 281 | typedef PUCHAR (WINAPI * GetSidSubAuthorityCount_Proc) ( |
| 282 | PSID pSid); |
| 283 | typedef DWORD (WINAPI * GetSecurityInfo_Proc) ( |
| 284 | HANDLE handle, |
| 285 | SE_OBJECT_TYPE ObjectType, |
| 286 | SECURITY_INFORMATION SecurityInfo, |
| 287 | PSID *ppsidOwner, |
| 288 | PSID *ppsidGroup, |
| 289 | PACL *ppDacl, |
| 290 | PACL *ppSacl, |
| 291 | PSECURITY_DESCRIPTOR *ppSecurityDescriptor); |
| 292 | typedef BOOL (WINAPI * GetFileSecurity_Proc) ( |
| 293 | LPCTSTR lpFileName, |
| 294 | SECURITY_INFORMATION RequestedInformation, |
| 295 | PSECURITY_DESCRIPTOR pSecurityDescriptor, |
| 296 | DWORD nLength, |
| 297 | LPDWORD lpnLengthNeeded); |
| 298 | typedef BOOL (WINAPI * GetSecurityDescriptorOwner_Proc) ( |
| 299 | PSECURITY_DESCRIPTOR pSecurityDescriptor, |
| 300 | PSID *pOwner, |
| 301 | LPBOOL lpbOwnerDefaulted); |
| 302 | typedef BOOL (WINAPI * GetSecurityDescriptorGroup_Proc) ( |
| 303 | PSECURITY_DESCRIPTOR pSecurityDescriptor, |
| 304 | PSID *pGroup, |
| 305 | LPBOOL lpbGroupDefaulted); |
| 306 | typedef BOOL (WINAPI * IsValidSid_Proc) ( |
| 307 | PSID sid); |
| 308 | typedef HANDLE (WINAPI * CreateToolhelp32Snapshot_Proc) ( |
| 309 | DWORD dwFlags, |
| 310 | DWORD th32ProcessID); |
| 311 | typedef BOOL (WINAPI * Process32First_Proc) ( |
| 312 | HANDLE hSnapshot, |
| 313 | LPPROCESSENTRY32 lppe); |
| 314 | typedef BOOL (WINAPI * Process32Next_Proc) ( |
| 315 | HANDLE hSnapshot, |
| 316 | LPPROCESSENTRY32 lppe); |
| 317 | typedef BOOL (WINAPI * OpenThreadToken_Proc) ( |
| 318 | HANDLE ThreadHandle, |
| 319 | DWORD DesiredAccess, |
| 320 | BOOL OpenAsSelf, |
| 321 | PHANDLE TokenHandle); |
| 322 | typedef BOOL (WINAPI * ImpersonateSelf_Proc) ( |
| 323 | SECURITY_IMPERSONATION_LEVEL ImpersonationLevel); |
| 324 | typedef BOOL (WINAPI * RevertToSelf_Proc) (void); |
| 325 | typedef BOOL (WINAPI * GetProcessMemoryInfo_Proc) ( |
| 326 | HANDLE Process, |
| 327 | PPROCESS_MEMORY_COUNTERS ppsmemCounters, |
| 328 | DWORD cb); |
| 329 | typedef BOOL (WINAPI * GetProcessWorkingSetSize_Proc) ( |
| 330 | HANDLE hProcess, |
| 331 | DWORD * lpMinimumWorkingSetSize, |
| 332 | DWORD * lpMaximumWorkingSetSize); |
| 333 | typedef BOOL (WINAPI * GlobalMemoryStatus_Proc) ( |
| 334 | LPMEMORYSTATUS lpBuffer); |
| 335 | typedef BOOL (WINAPI * GlobalMemoryStatusEx_Proc) ( |
| 336 | LPMEMORY_STATUS_EX lpBuffer); |
| 337 | typedef BOOL (WINAPI * CopySid_Proc) ( |
| 338 | DWORD nDestinationSidLength, |
| 339 | PSID pDestinationSid, |
| 340 | PSID pSourceSid); |
| 341 | typedef BOOL (WINAPI * EqualSid_Proc) ( |
| 342 | PSID pSid1, |
| 343 | PSID pSid2); |
| 344 | typedef DWORD (WINAPI * GetLengthSid_Proc) ( |
| 345 | PSID pSid); |
| 346 | typedef void (WINAPI * GetNativeSystemInfo_Proc) ( |
| 347 | LPSYSTEM_INFO lpSystemInfo); |
| 348 | typedef BOOL (WINAPI * GetSystemTimes_Proc) ( |
| 349 | LPFILETIME lpIdleTime, |
| 350 | LPFILETIME lpKernelTime, |
| 351 | LPFILETIME lpUserTime); |
| 352 | typedef BOOLEAN (WINAPI *CreateSymbolicLink_Proc) ( |
| 353 | LPTSTR lpSymlinkFileName, |
| 354 | LPTSTR lpTargetFileName, |
| 355 | DWORD dwFlags); |
| 356 | |
| 357 | /* ** A utility function ** */ |
| 358 | static BOOL |
| 359 | is_windows_9x (void) |
| 360 | { |
| 361 | static BOOL s_b_ret = 0; |
| 362 | OSVERSIONINFO os_ver; |
| 363 | if (g_b_init_is_windows_9x == 0) |
| 364 | { |
| 365 | g_b_init_is_windows_9x = 1; |
| 366 | ZeroMemory (&os_ver, sizeof (OSVERSIONINFO)); |
| 367 | os_ver.dwOSVersionInfoSize = sizeof (OSVERSIONINFO); |
| 368 | if (GetVersionEx (&os_ver)) |
| 369 | { |
| 370 | s_b_ret = (os_ver.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS); |
| 371 | } |
| 372 | } |
| 373 | return s_b_ret; |
| 374 | } |
| 375 | |
| 376 | static Lisp_Object ltime (ULONGLONG); |
| 377 | |
| 378 | /* Get total user and system times for get-internal-run-time. |
| 379 | Returns a list of integers if the times are provided by the OS |
| 380 | (NT derivatives), otherwise it returns the result of current-time. */ |
| 381 | Lisp_Object |
| 382 | w32_get_internal_run_time (void) |
| 383 | { |
| 384 | if (get_process_times_fn) |
| 385 | { |
| 386 | FILETIME create, exit, kernel, user; |
| 387 | HANDLE proc = GetCurrentProcess (); |
| 388 | if ((*get_process_times_fn) (proc, &create, &exit, &kernel, &user)) |
| 389 | { |
| 390 | LARGE_INTEGER user_int, kernel_int, total; |
| 391 | user_int.LowPart = user.dwLowDateTime; |
| 392 | user_int.HighPart = user.dwHighDateTime; |
| 393 | kernel_int.LowPart = kernel.dwLowDateTime; |
| 394 | kernel_int.HighPart = kernel.dwHighDateTime; |
| 395 | total.QuadPart = user_int.QuadPart + kernel_int.QuadPart; |
| 396 | return ltime (total.QuadPart); |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | return Fcurrent_time (); |
| 401 | } |
| 402 | |
| 403 | /* ** The wrapper functions ** */ |
| 404 | |
| 405 | static BOOL WINAPI |
| 406 | open_process_token (HANDLE ProcessHandle, |
| 407 | DWORD DesiredAccess, |
| 408 | PHANDLE TokenHandle) |
| 409 | { |
| 410 | static OpenProcessToken_Proc s_pfn_Open_Process_Token = NULL; |
| 411 | HMODULE hm_advapi32 = NULL; |
| 412 | if (is_windows_9x () == TRUE) |
| 413 | { |
| 414 | return FALSE; |
| 415 | } |
| 416 | if (g_b_init_open_process_token == 0) |
| 417 | { |
| 418 | g_b_init_open_process_token = 1; |
| 419 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 420 | s_pfn_Open_Process_Token = |
| 421 | (OpenProcessToken_Proc) GetProcAddress (hm_advapi32, "OpenProcessToken"); |
| 422 | } |
| 423 | if (s_pfn_Open_Process_Token == NULL) |
| 424 | { |
| 425 | return FALSE; |
| 426 | } |
| 427 | return ( |
| 428 | s_pfn_Open_Process_Token ( |
| 429 | ProcessHandle, |
| 430 | DesiredAccess, |
| 431 | TokenHandle) |
| 432 | ); |
| 433 | } |
| 434 | |
| 435 | static BOOL WINAPI |
| 436 | get_token_information (HANDLE TokenHandle, |
| 437 | TOKEN_INFORMATION_CLASS TokenInformationClass, |
| 438 | LPVOID TokenInformation, |
| 439 | DWORD TokenInformationLength, |
| 440 | PDWORD ReturnLength) |
| 441 | { |
| 442 | static GetTokenInformation_Proc s_pfn_Get_Token_Information = NULL; |
| 443 | HMODULE hm_advapi32 = NULL; |
| 444 | if (is_windows_9x () == TRUE) |
| 445 | { |
| 446 | return FALSE; |
| 447 | } |
| 448 | if (g_b_init_get_token_information == 0) |
| 449 | { |
| 450 | g_b_init_get_token_information = 1; |
| 451 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 452 | s_pfn_Get_Token_Information = |
| 453 | (GetTokenInformation_Proc) GetProcAddress (hm_advapi32, "GetTokenInformation"); |
| 454 | } |
| 455 | if (s_pfn_Get_Token_Information == NULL) |
| 456 | { |
| 457 | return FALSE; |
| 458 | } |
| 459 | return ( |
| 460 | s_pfn_Get_Token_Information ( |
| 461 | TokenHandle, |
| 462 | TokenInformationClass, |
| 463 | TokenInformation, |
| 464 | TokenInformationLength, |
| 465 | ReturnLength) |
| 466 | ); |
| 467 | } |
| 468 | |
| 469 | static BOOL WINAPI |
| 470 | lookup_account_sid (LPCTSTR lpSystemName, |
| 471 | PSID Sid, |
| 472 | LPTSTR Name, |
| 473 | LPDWORD cbName, |
| 474 | LPTSTR DomainName, |
| 475 | LPDWORD cbDomainName, |
| 476 | PSID_NAME_USE peUse) |
| 477 | { |
| 478 | static LookupAccountSid_Proc s_pfn_Lookup_Account_Sid = NULL; |
| 479 | HMODULE hm_advapi32 = NULL; |
| 480 | if (is_windows_9x () == TRUE) |
| 481 | { |
| 482 | return FALSE; |
| 483 | } |
| 484 | if (g_b_init_lookup_account_sid == 0) |
| 485 | { |
| 486 | g_b_init_lookup_account_sid = 1; |
| 487 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 488 | s_pfn_Lookup_Account_Sid = |
| 489 | (LookupAccountSid_Proc) GetProcAddress (hm_advapi32, LookupAccountSid_Name); |
| 490 | } |
| 491 | if (s_pfn_Lookup_Account_Sid == NULL) |
| 492 | { |
| 493 | return FALSE; |
| 494 | } |
| 495 | return ( |
| 496 | s_pfn_Lookup_Account_Sid ( |
| 497 | lpSystemName, |
| 498 | Sid, |
| 499 | Name, |
| 500 | cbName, |
| 501 | DomainName, |
| 502 | cbDomainName, |
| 503 | peUse) |
| 504 | ); |
| 505 | } |
| 506 | |
| 507 | static PDWORD WINAPI |
| 508 | get_sid_sub_authority (PSID pSid, DWORD n) |
| 509 | { |
| 510 | static GetSidSubAuthority_Proc s_pfn_Get_Sid_Sub_Authority = NULL; |
| 511 | static DWORD zero = 0U; |
| 512 | HMODULE hm_advapi32 = NULL; |
| 513 | if (is_windows_9x () == TRUE) |
| 514 | { |
| 515 | return &zero; |
| 516 | } |
| 517 | if (g_b_init_get_sid_sub_authority == 0) |
| 518 | { |
| 519 | g_b_init_get_sid_sub_authority = 1; |
| 520 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 521 | s_pfn_Get_Sid_Sub_Authority = |
| 522 | (GetSidSubAuthority_Proc) GetProcAddress ( |
| 523 | hm_advapi32, "GetSidSubAuthority"); |
| 524 | } |
| 525 | if (s_pfn_Get_Sid_Sub_Authority == NULL) |
| 526 | { |
| 527 | return &zero; |
| 528 | } |
| 529 | return (s_pfn_Get_Sid_Sub_Authority (pSid, n)); |
| 530 | } |
| 531 | |
| 532 | static PUCHAR WINAPI |
| 533 | get_sid_sub_authority_count (PSID pSid) |
| 534 | { |
| 535 | static GetSidSubAuthorityCount_Proc s_pfn_Get_Sid_Sub_Authority_Count = NULL; |
| 536 | static UCHAR zero = 0U; |
| 537 | HMODULE hm_advapi32 = NULL; |
| 538 | if (is_windows_9x () == TRUE) |
| 539 | { |
| 540 | return &zero; |
| 541 | } |
| 542 | if (g_b_init_get_sid_sub_authority_count == 0) |
| 543 | { |
| 544 | g_b_init_get_sid_sub_authority_count = 1; |
| 545 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 546 | s_pfn_Get_Sid_Sub_Authority_Count = |
| 547 | (GetSidSubAuthorityCount_Proc) GetProcAddress ( |
| 548 | hm_advapi32, "GetSidSubAuthorityCount"); |
| 549 | } |
| 550 | if (s_pfn_Get_Sid_Sub_Authority_Count == NULL) |
| 551 | { |
| 552 | return &zero; |
| 553 | } |
| 554 | return (s_pfn_Get_Sid_Sub_Authority_Count (pSid)); |
| 555 | } |
| 556 | |
| 557 | static DWORD WINAPI |
| 558 | get_security_info (HANDLE handle, |
| 559 | SE_OBJECT_TYPE ObjectType, |
| 560 | SECURITY_INFORMATION SecurityInfo, |
| 561 | PSID *ppsidOwner, |
| 562 | PSID *ppsidGroup, |
| 563 | PACL *ppDacl, |
| 564 | PACL *ppSacl, |
| 565 | PSECURITY_DESCRIPTOR *ppSecurityDescriptor) |
| 566 | { |
| 567 | static GetSecurityInfo_Proc s_pfn_Get_Security_Info = NULL; |
| 568 | HMODULE hm_advapi32 = NULL; |
| 569 | if (is_windows_9x () == TRUE) |
| 570 | { |
| 571 | return FALSE; |
| 572 | } |
| 573 | if (g_b_init_get_security_info == 0) |
| 574 | { |
| 575 | g_b_init_get_security_info = 1; |
| 576 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 577 | s_pfn_Get_Security_Info = |
| 578 | (GetSecurityInfo_Proc) GetProcAddress ( |
| 579 | hm_advapi32, "GetSecurityInfo"); |
| 580 | } |
| 581 | if (s_pfn_Get_Security_Info == NULL) |
| 582 | { |
| 583 | return FALSE; |
| 584 | } |
| 585 | return (s_pfn_Get_Security_Info (handle, ObjectType, SecurityInfo, |
| 586 | ppsidOwner, ppsidGroup, ppDacl, ppSacl, |
| 587 | ppSecurityDescriptor)); |
| 588 | } |
| 589 | |
| 590 | static BOOL WINAPI |
| 591 | get_file_security (LPCTSTR lpFileName, |
| 592 | SECURITY_INFORMATION RequestedInformation, |
| 593 | PSECURITY_DESCRIPTOR pSecurityDescriptor, |
| 594 | DWORD nLength, |
| 595 | LPDWORD lpnLengthNeeded) |
| 596 | { |
| 597 | static GetFileSecurity_Proc s_pfn_Get_File_Security = NULL; |
| 598 | HMODULE hm_advapi32 = NULL; |
| 599 | if (is_windows_9x () == TRUE) |
| 600 | { |
| 601 | return FALSE; |
| 602 | } |
| 603 | if (g_b_init_get_file_security == 0) |
| 604 | { |
| 605 | g_b_init_get_file_security = 1; |
| 606 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 607 | s_pfn_Get_File_Security = |
| 608 | (GetFileSecurity_Proc) GetProcAddress ( |
| 609 | hm_advapi32, GetFileSecurity_Name); |
| 610 | } |
| 611 | if (s_pfn_Get_File_Security == NULL) |
| 612 | { |
| 613 | return FALSE; |
| 614 | } |
| 615 | return (s_pfn_Get_File_Security (lpFileName, RequestedInformation, |
| 616 | pSecurityDescriptor, nLength, |
| 617 | lpnLengthNeeded)); |
| 618 | } |
| 619 | |
| 620 | static BOOL WINAPI |
| 621 | get_security_descriptor_owner (PSECURITY_DESCRIPTOR pSecurityDescriptor, |
| 622 | PSID *pOwner, |
| 623 | LPBOOL lpbOwnerDefaulted) |
| 624 | { |
| 625 | static GetSecurityDescriptorOwner_Proc s_pfn_Get_Security_Descriptor_Owner = NULL; |
| 626 | HMODULE hm_advapi32 = NULL; |
| 627 | if (is_windows_9x () == TRUE) |
| 628 | { |
| 629 | return FALSE; |
| 630 | } |
| 631 | if (g_b_init_get_security_descriptor_owner == 0) |
| 632 | { |
| 633 | g_b_init_get_security_descriptor_owner = 1; |
| 634 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 635 | s_pfn_Get_Security_Descriptor_Owner = |
| 636 | (GetSecurityDescriptorOwner_Proc) GetProcAddress ( |
| 637 | hm_advapi32, "GetSecurityDescriptorOwner"); |
| 638 | } |
| 639 | if (s_pfn_Get_Security_Descriptor_Owner == NULL) |
| 640 | { |
| 641 | return FALSE; |
| 642 | } |
| 643 | return (s_pfn_Get_Security_Descriptor_Owner (pSecurityDescriptor, pOwner, |
| 644 | lpbOwnerDefaulted)); |
| 645 | } |
| 646 | |
| 647 | static BOOL WINAPI |
| 648 | get_security_descriptor_group (PSECURITY_DESCRIPTOR pSecurityDescriptor, |
| 649 | PSID *pGroup, |
| 650 | LPBOOL lpbGroupDefaulted) |
| 651 | { |
| 652 | static GetSecurityDescriptorGroup_Proc s_pfn_Get_Security_Descriptor_Group = NULL; |
| 653 | HMODULE hm_advapi32 = NULL; |
| 654 | if (is_windows_9x () == TRUE) |
| 655 | { |
| 656 | return FALSE; |
| 657 | } |
| 658 | if (g_b_init_get_security_descriptor_group == 0) |
| 659 | { |
| 660 | g_b_init_get_security_descriptor_group = 1; |
| 661 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 662 | s_pfn_Get_Security_Descriptor_Group = |
| 663 | (GetSecurityDescriptorGroup_Proc) GetProcAddress ( |
| 664 | hm_advapi32, "GetSecurityDescriptorGroup"); |
| 665 | } |
| 666 | if (s_pfn_Get_Security_Descriptor_Group == NULL) |
| 667 | { |
| 668 | return FALSE; |
| 669 | } |
| 670 | return (s_pfn_Get_Security_Descriptor_Group (pSecurityDescriptor, pGroup, |
| 671 | lpbGroupDefaulted)); |
| 672 | } |
| 673 | |
| 674 | static BOOL WINAPI |
| 675 | is_valid_sid (PSID sid) |
| 676 | { |
| 677 | static IsValidSid_Proc s_pfn_Is_Valid_Sid = NULL; |
| 678 | HMODULE hm_advapi32 = NULL; |
| 679 | if (is_windows_9x () == TRUE) |
| 680 | { |
| 681 | return FALSE; |
| 682 | } |
| 683 | if (g_b_init_is_valid_sid == 0) |
| 684 | { |
| 685 | g_b_init_is_valid_sid = 1; |
| 686 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 687 | s_pfn_Is_Valid_Sid = |
| 688 | (IsValidSid_Proc) GetProcAddress ( |
| 689 | hm_advapi32, "IsValidSid"); |
| 690 | } |
| 691 | if (s_pfn_Is_Valid_Sid == NULL) |
| 692 | { |
| 693 | return FALSE; |
| 694 | } |
| 695 | return (s_pfn_Is_Valid_Sid (sid)); |
| 696 | } |
| 697 | |
| 698 | static BOOL WINAPI |
| 699 | equal_sid (PSID sid1, PSID sid2) |
| 700 | { |
| 701 | static EqualSid_Proc s_pfn_Equal_Sid = NULL; |
| 702 | HMODULE hm_advapi32 = NULL; |
| 703 | if (is_windows_9x () == TRUE) |
| 704 | { |
| 705 | return FALSE; |
| 706 | } |
| 707 | if (g_b_init_equal_sid == 0) |
| 708 | { |
| 709 | g_b_init_equal_sid = 1; |
| 710 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 711 | s_pfn_Equal_Sid = |
| 712 | (EqualSid_Proc) GetProcAddress ( |
| 713 | hm_advapi32, "EqualSid"); |
| 714 | } |
| 715 | if (s_pfn_Equal_Sid == NULL) |
| 716 | { |
| 717 | return FALSE; |
| 718 | } |
| 719 | return (s_pfn_Equal_Sid (sid1, sid2)); |
| 720 | } |
| 721 | |
| 722 | static DWORD WINAPI |
| 723 | get_length_sid (PSID sid) |
| 724 | { |
| 725 | static GetLengthSid_Proc s_pfn_Get_Length_Sid = NULL; |
| 726 | HMODULE hm_advapi32 = NULL; |
| 727 | if (is_windows_9x () == TRUE) |
| 728 | { |
| 729 | return 0; |
| 730 | } |
| 731 | if (g_b_init_get_length_sid == 0) |
| 732 | { |
| 733 | g_b_init_get_length_sid = 1; |
| 734 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 735 | s_pfn_Get_Length_Sid = |
| 736 | (GetLengthSid_Proc) GetProcAddress ( |
| 737 | hm_advapi32, "GetLengthSid"); |
| 738 | } |
| 739 | if (s_pfn_Get_Length_Sid == NULL) |
| 740 | { |
| 741 | return 0; |
| 742 | } |
| 743 | return (s_pfn_Get_Length_Sid (sid)); |
| 744 | } |
| 745 | |
| 746 | static BOOL WINAPI |
| 747 | copy_sid (DWORD destlen, PSID dest, PSID src) |
| 748 | { |
| 749 | static CopySid_Proc s_pfn_Copy_Sid = NULL; |
| 750 | HMODULE hm_advapi32 = NULL; |
| 751 | if (is_windows_9x () == TRUE) |
| 752 | { |
| 753 | return FALSE; |
| 754 | } |
| 755 | if (g_b_init_copy_sid == 0) |
| 756 | { |
| 757 | g_b_init_copy_sid = 1; |
| 758 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 759 | s_pfn_Copy_Sid = |
| 760 | (CopySid_Proc) GetProcAddress ( |
| 761 | hm_advapi32, "CopySid"); |
| 762 | } |
| 763 | if (s_pfn_Copy_Sid == NULL) |
| 764 | { |
| 765 | return FALSE; |
| 766 | } |
| 767 | return (s_pfn_Copy_Sid (destlen, dest, src)); |
| 768 | } |
| 769 | |
| 770 | /* |
| 771 | END: Wrapper functions around OpenProcessToken |
| 772 | and other functions in advapi32.dll that are only |
| 773 | supported in Windows NT / 2k / XP |
| 774 | */ |
| 775 | |
| 776 | static void WINAPI |
| 777 | get_native_system_info (LPSYSTEM_INFO lpSystemInfo) |
| 778 | { |
| 779 | static GetNativeSystemInfo_Proc s_pfn_Get_Native_System_Info = NULL; |
| 780 | if (is_windows_9x () != TRUE) |
| 781 | { |
| 782 | if (g_b_init_get_native_system_info == 0) |
| 783 | { |
| 784 | g_b_init_get_native_system_info = 1; |
| 785 | s_pfn_Get_Native_System_Info = |
| 786 | (GetNativeSystemInfo_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 787 | "GetNativeSystemInfo"); |
| 788 | } |
| 789 | if (s_pfn_Get_Native_System_Info != NULL) |
| 790 | s_pfn_Get_Native_System_Info (lpSystemInfo); |
| 791 | } |
| 792 | else |
| 793 | lpSystemInfo->dwNumberOfProcessors = -1; |
| 794 | } |
| 795 | |
| 796 | static BOOL WINAPI |
| 797 | get_system_times (LPFILETIME lpIdleTime, |
| 798 | LPFILETIME lpKernelTime, |
| 799 | LPFILETIME lpUserTime) |
| 800 | { |
| 801 | static GetSystemTimes_Proc s_pfn_Get_System_times = NULL; |
| 802 | if (is_windows_9x () == TRUE) |
| 803 | { |
| 804 | return FALSE; |
| 805 | } |
| 806 | if (g_b_init_get_system_times == 0) |
| 807 | { |
| 808 | g_b_init_get_system_times = 1; |
| 809 | s_pfn_Get_System_times = |
| 810 | (GetSystemTimes_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 811 | "GetSystemTimes"); |
| 812 | } |
| 813 | if (s_pfn_Get_System_times == NULL) |
| 814 | return FALSE; |
| 815 | return (s_pfn_Get_System_times (lpIdleTime, lpKernelTime, lpUserTime)); |
| 816 | } |
| 817 | |
| 818 | static BOOLEAN WINAPI |
| 819 | create_symbolic_link (LPTSTR lpSymlinkFilename, |
| 820 | LPTSTR lpTargetFileName, |
| 821 | DWORD dwFlags) |
| 822 | { |
| 823 | static CreateSymbolicLink_Proc s_pfn_Create_Symbolic_Link = NULL; |
| 824 | BOOLEAN retval; |
| 825 | |
| 826 | if (is_windows_9x () == TRUE) |
| 827 | { |
| 828 | errno = ENOSYS; |
| 829 | return 0; |
| 830 | } |
| 831 | if (g_b_init_create_symbolic_link == 0) |
| 832 | { |
| 833 | g_b_init_create_symbolic_link = 1; |
| 834 | #ifdef _UNICODE |
| 835 | s_pfn_Create_Symbolic_Link = |
| 836 | (CreateSymbolicLink_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 837 | "CreateSymbolicLinkW"); |
| 838 | #else |
| 839 | s_pfn_Create_Symbolic_Link = |
| 840 | (CreateSymbolicLink_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 841 | "CreateSymbolicLinkA"); |
| 842 | #endif |
| 843 | } |
| 844 | if (s_pfn_Create_Symbolic_Link == NULL) |
| 845 | { |
| 846 | errno = ENOSYS; |
| 847 | return 0; |
| 848 | } |
| 849 | |
| 850 | retval = s_pfn_Create_Symbolic_Link (lpSymlinkFilename, lpTargetFileName, |
| 851 | dwFlags); |
| 852 | /* If we were denied creation of the symlink, try again after |
| 853 | enabling the SeCreateSymbolicLinkPrivilege for our process. */ |
| 854 | if (!retval) |
| 855 | { |
| 856 | TOKEN_PRIVILEGES priv_current; |
| 857 | |
| 858 | if (enable_privilege (SE_CREATE_SYMBOLIC_LINK_NAME, TRUE, &priv_current)) |
| 859 | { |
| 860 | retval = s_pfn_Create_Symbolic_Link (lpSymlinkFilename, lpTargetFileName, |
| 861 | dwFlags); |
| 862 | restore_privilege (&priv_current); |
| 863 | revert_to_self (); |
| 864 | } |
| 865 | } |
| 866 | return retval; |
| 867 | } |
| 868 | \f |
| 869 | /* Equivalent of strerror for W32 error codes. */ |
| 870 | char * |
| 871 | w32_strerror (int error_no) |
| 872 | { |
| 873 | static char buf[500]; |
| 874 | |
| 875 | if (error_no == 0) |
| 876 | error_no = GetLastError (); |
| 877 | |
| 878 | buf[0] = '\0'; |
| 879 | if (!FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM, NULL, |
| 880 | error_no, |
| 881 | 0, /* choose most suitable language */ |
| 882 | buf, sizeof (buf), NULL)) |
| 883 | sprintf (buf, "w32 error %u", error_no); |
| 884 | return buf; |
| 885 | } |
| 886 | |
| 887 | /* Return 1 if P is a valid pointer to an object of size SIZE. Return |
| 888 | 0 if P is NOT a valid pointer. Return -1 if we cannot validate P. |
| 889 | |
| 890 | This is called from alloc.c:valid_pointer_p. */ |
| 891 | int |
| 892 | w32_valid_pointer_p (void *p, int size) |
| 893 | { |
| 894 | SIZE_T done; |
| 895 | HANDLE h = OpenProcess (PROCESS_VM_READ, FALSE, GetCurrentProcessId ()); |
| 896 | |
| 897 | if (h) |
| 898 | { |
| 899 | unsigned char *buf = alloca (size); |
| 900 | int retval = ReadProcessMemory (h, p, buf, size, &done); |
| 901 | |
| 902 | CloseHandle (h); |
| 903 | return retval; |
| 904 | } |
| 905 | else |
| 906 | return -1; |
| 907 | } |
| 908 | |
| 909 | static char startup_dir[MAXPATHLEN]; |
| 910 | |
| 911 | /* Get the current working directory. */ |
| 912 | char * |
| 913 | getwd (char *dir) |
| 914 | { |
| 915 | #if 0 |
| 916 | if (GetCurrentDirectory (MAXPATHLEN, dir) > 0) |
| 917 | return dir; |
| 918 | return NULL; |
| 919 | #else |
| 920 | /* Emacs doesn't actually change directory itself, it stays in the |
| 921 | same directory where it was started. */ |
| 922 | strcpy (dir, startup_dir); |
| 923 | return dir; |
| 924 | #endif |
| 925 | } |
| 926 | |
| 927 | /* Emulate getloadavg. */ |
| 928 | |
| 929 | struct load_sample { |
| 930 | time_t sample_time; |
| 931 | ULONGLONG idle; |
| 932 | ULONGLONG kernel; |
| 933 | ULONGLONG user; |
| 934 | }; |
| 935 | |
| 936 | /* Number of processors on this machine. */ |
| 937 | static unsigned num_of_processors; |
| 938 | |
| 939 | /* We maintain 1-sec samples for the last 16 minutes in a circular buffer. */ |
| 940 | static struct load_sample samples[16*60]; |
| 941 | static int first_idx = -1, last_idx = -1; |
| 942 | static int max_idx = sizeof (samples) / sizeof (samples[0]); |
| 943 | |
| 944 | static int |
| 945 | buf_next (int from) |
| 946 | { |
| 947 | int next_idx = from + 1; |
| 948 | |
| 949 | if (next_idx >= max_idx) |
| 950 | next_idx = 0; |
| 951 | |
| 952 | return next_idx; |
| 953 | } |
| 954 | |
| 955 | static int |
| 956 | buf_prev (int from) |
| 957 | { |
| 958 | int prev_idx = from - 1; |
| 959 | |
| 960 | if (prev_idx < 0) |
| 961 | prev_idx = max_idx - 1; |
| 962 | |
| 963 | return prev_idx; |
| 964 | } |
| 965 | |
| 966 | static void |
| 967 | sample_system_load (ULONGLONG *idle, ULONGLONG *kernel, ULONGLONG *user) |
| 968 | { |
| 969 | SYSTEM_INFO sysinfo; |
| 970 | FILETIME ft_idle, ft_user, ft_kernel; |
| 971 | |
| 972 | /* Initialize the number of processors on this machine. */ |
| 973 | if (num_of_processors <= 0) |
| 974 | { |
| 975 | get_native_system_info (&sysinfo); |
| 976 | num_of_processors = sysinfo.dwNumberOfProcessors; |
| 977 | if (num_of_processors <= 0) |
| 978 | { |
| 979 | GetSystemInfo (&sysinfo); |
| 980 | num_of_processors = sysinfo.dwNumberOfProcessors; |
| 981 | } |
| 982 | if (num_of_processors <= 0) |
| 983 | num_of_processors = 1; |
| 984 | } |
| 985 | |
| 986 | /* TODO: Take into account threads that are ready to run, by |
| 987 | sampling the "\System\Processor Queue Length" performance |
| 988 | counter. The code below accounts only for threads that are |
| 989 | actually running. */ |
| 990 | |
| 991 | if (get_system_times (&ft_idle, &ft_kernel, &ft_user)) |
| 992 | { |
| 993 | ULARGE_INTEGER uidle, ukernel, uuser; |
| 994 | |
| 995 | memcpy (&uidle, &ft_idle, sizeof (ft_idle)); |
| 996 | memcpy (&ukernel, &ft_kernel, sizeof (ft_kernel)); |
| 997 | memcpy (&uuser, &ft_user, sizeof (ft_user)); |
| 998 | *idle = uidle.QuadPart; |
| 999 | *kernel = ukernel.QuadPart; |
| 1000 | *user = uuser.QuadPart; |
| 1001 | } |
| 1002 | else |
| 1003 | { |
| 1004 | *idle = 0; |
| 1005 | *kernel = 0; |
| 1006 | *user = 0; |
| 1007 | } |
| 1008 | } |
| 1009 | |
| 1010 | /* Produce the load average for a given time interval, using the |
| 1011 | samples in the samples[] array. WHICH can be 0, 1, or 2, meaning |
| 1012 | 1-minute, 5-minute, or 15-minute average, respectively. */ |
| 1013 | static double |
| 1014 | getavg (int which) |
| 1015 | { |
| 1016 | double retval = -1.0; |
| 1017 | double tdiff; |
| 1018 | int idx; |
| 1019 | double span = (which == 0 ? 1.0 : (which == 1 ? 5.0 : 15.0)) * 60; |
| 1020 | time_t now = samples[last_idx].sample_time; |
| 1021 | |
| 1022 | if (first_idx != last_idx) |
| 1023 | { |
| 1024 | for (idx = buf_prev (last_idx); ; idx = buf_prev (idx)) |
| 1025 | { |
| 1026 | tdiff = difftime (now, samples[idx].sample_time); |
| 1027 | if (tdiff >= span - 2*DBL_EPSILON*now) |
| 1028 | { |
| 1029 | long double sys = |
| 1030 | samples[last_idx].kernel + samples[last_idx].user |
| 1031 | - (samples[idx].kernel + samples[idx].user); |
| 1032 | long double idl = samples[last_idx].idle - samples[idx].idle; |
| 1033 | |
| 1034 | retval = (1.0 - idl / sys) * num_of_processors; |
| 1035 | break; |
| 1036 | } |
| 1037 | if (idx == first_idx) |
| 1038 | break; |
| 1039 | } |
| 1040 | } |
| 1041 | |
| 1042 | return retval; |
| 1043 | } |
| 1044 | |
| 1045 | int |
| 1046 | getloadavg (double loadavg[], int nelem) |
| 1047 | { |
| 1048 | int elem; |
| 1049 | ULONGLONG idle, kernel, user; |
| 1050 | time_t now = time (NULL); |
| 1051 | |
| 1052 | /* Store another sample. We ignore samples that are less than 1 sec |
| 1053 | apart. */ |
| 1054 | if (difftime (now, samples[last_idx].sample_time) >= 1.0 - 2*DBL_EPSILON*now) |
| 1055 | { |
| 1056 | sample_system_load (&idle, &kernel, &user); |
| 1057 | last_idx = buf_next (last_idx); |
| 1058 | samples[last_idx].sample_time = now; |
| 1059 | samples[last_idx].idle = idle; |
| 1060 | samples[last_idx].kernel = kernel; |
| 1061 | samples[last_idx].user = user; |
| 1062 | /* If the buffer has more that 15 min worth of samples, discard |
| 1063 | the old ones. */ |
| 1064 | if (first_idx == -1) |
| 1065 | first_idx = last_idx; |
| 1066 | while (first_idx != last_idx |
| 1067 | && (difftime (now, samples[first_idx].sample_time) |
| 1068 | >= 15.0*60 + 2*DBL_EPSILON*now)) |
| 1069 | first_idx = buf_next (first_idx); |
| 1070 | } |
| 1071 | |
| 1072 | for (elem = 0; elem < nelem; elem++) |
| 1073 | { |
| 1074 | double avg = getavg (elem); |
| 1075 | |
| 1076 | if (avg < 0) |
| 1077 | break; |
| 1078 | loadavg[elem] = avg; |
| 1079 | } |
| 1080 | |
| 1081 | return elem; |
| 1082 | } |
| 1083 | |
| 1084 | /* Emulate getpwuid, getpwnam and others. */ |
| 1085 | |
| 1086 | #define PASSWD_FIELD_SIZE 256 |
| 1087 | |
| 1088 | static char dflt_passwd_name[PASSWD_FIELD_SIZE]; |
| 1089 | static char dflt_passwd_passwd[PASSWD_FIELD_SIZE]; |
| 1090 | static char dflt_passwd_gecos[PASSWD_FIELD_SIZE]; |
| 1091 | static char dflt_passwd_dir[PASSWD_FIELD_SIZE]; |
| 1092 | static char dflt_passwd_shell[PASSWD_FIELD_SIZE]; |
| 1093 | |
| 1094 | static struct passwd dflt_passwd = |
| 1095 | { |
| 1096 | dflt_passwd_name, |
| 1097 | dflt_passwd_passwd, |
| 1098 | 0, |
| 1099 | 0, |
| 1100 | 0, |
| 1101 | dflt_passwd_gecos, |
| 1102 | dflt_passwd_dir, |
| 1103 | dflt_passwd_shell, |
| 1104 | }; |
| 1105 | |
| 1106 | static char dflt_group_name[GNLEN+1]; |
| 1107 | |
| 1108 | static struct group dflt_group = |
| 1109 | { |
| 1110 | /* When group information is not available, we return this as the |
| 1111 | group for all files. */ |
| 1112 | dflt_group_name, |
| 1113 | 0, |
| 1114 | }; |
| 1115 | |
| 1116 | unsigned |
| 1117 | getuid (void) |
| 1118 | { |
| 1119 | return dflt_passwd.pw_uid; |
| 1120 | } |
| 1121 | |
| 1122 | unsigned |
| 1123 | geteuid (void) |
| 1124 | { |
| 1125 | /* I could imagine arguing for checking to see whether the user is |
| 1126 | in the Administrators group and returning a UID of 0 for that |
| 1127 | case, but I don't know how wise that would be in the long run. */ |
| 1128 | return getuid (); |
| 1129 | } |
| 1130 | |
| 1131 | unsigned |
| 1132 | getgid (void) |
| 1133 | { |
| 1134 | return dflt_passwd.pw_gid; |
| 1135 | } |
| 1136 | |
| 1137 | unsigned |
| 1138 | getegid (void) |
| 1139 | { |
| 1140 | return getgid (); |
| 1141 | } |
| 1142 | |
| 1143 | struct passwd * |
| 1144 | getpwuid (unsigned uid) |
| 1145 | { |
| 1146 | if (uid == dflt_passwd.pw_uid) |
| 1147 | return &dflt_passwd; |
| 1148 | return NULL; |
| 1149 | } |
| 1150 | |
| 1151 | struct group * |
| 1152 | getgrgid (gid_t gid) |
| 1153 | { |
| 1154 | return &dflt_group; |
| 1155 | } |
| 1156 | |
| 1157 | struct passwd * |
| 1158 | getpwnam (char *name) |
| 1159 | { |
| 1160 | struct passwd *pw; |
| 1161 | |
| 1162 | pw = getpwuid (getuid ()); |
| 1163 | if (!pw) |
| 1164 | return pw; |
| 1165 | |
| 1166 | if (xstrcasecmp (name, pw->pw_name)) |
| 1167 | return NULL; |
| 1168 | |
| 1169 | return pw; |
| 1170 | } |
| 1171 | |
| 1172 | static void |
| 1173 | init_user_info (void) |
| 1174 | { |
| 1175 | /* Find the user's real name by opening the process token and |
| 1176 | looking up the name associated with the user-sid in that token. |
| 1177 | |
| 1178 | Use the relative portion of the identifier authority value from |
| 1179 | the user-sid as the user id value (same for group id using the |
| 1180 | primary group sid from the process token). */ |
| 1181 | |
| 1182 | char uname[UNLEN+1], gname[GNLEN+1], domain[1025]; |
| 1183 | DWORD ulength = sizeof (uname), dlength = sizeof (domain), needed; |
| 1184 | DWORD glength = sizeof (gname); |
| 1185 | HANDLE token = NULL; |
| 1186 | SID_NAME_USE user_type; |
| 1187 | unsigned char *buf = NULL; |
| 1188 | DWORD blen = 0; |
| 1189 | TOKEN_USER user_token; |
| 1190 | TOKEN_PRIMARY_GROUP group_token; |
| 1191 | BOOL result; |
| 1192 | |
| 1193 | result = open_process_token (GetCurrentProcess (), TOKEN_QUERY, &token); |
| 1194 | if (result) |
| 1195 | { |
| 1196 | result = get_token_information (token, TokenUser, NULL, 0, &blen); |
| 1197 | if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER) |
| 1198 | { |
| 1199 | buf = xmalloc (blen); |
| 1200 | result = get_token_information (token, TokenUser, |
| 1201 | (LPVOID)buf, blen, &needed); |
| 1202 | if (result) |
| 1203 | { |
| 1204 | memcpy (&user_token, buf, sizeof (user_token)); |
| 1205 | result = lookup_account_sid (NULL, user_token.User.Sid, |
| 1206 | uname, &ulength, |
| 1207 | domain, &dlength, &user_type); |
| 1208 | } |
| 1209 | } |
| 1210 | else |
| 1211 | result = FALSE; |
| 1212 | } |
| 1213 | if (result) |
| 1214 | { |
| 1215 | strcpy (dflt_passwd.pw_name, uname); |
| 1216 | /* Determine a reasonable uid value. */ |
| 1217 | if (xstrcasecmp ("administrator", uname) == 0) |
| 1218 | { |
| 1219 | dflt_passwd.pw_uid = 500; /* well-known Administrator uid */ |
| 1220 | dflt_passwd.pw_gid = 513; /* well-known None gid */ |
| 1221 | } |
| 1222 | else |
| 1223 | { |
| 1224 | /* Use the last sub-authority value of the RID, the relative |
| 1225 | portion of the SID, as user/group ID. */ |
| 1226 | dflt_passwd.pw_uid = get_rid (user_token.User.Sid); |
| 1227 | |
| 1228 | /* Get group id and name. */ |
| 1229 | result = get_token_information (token, TokenPrimaryGroup, |
| 1230 | (LPVOID)buf, blen, &needed); |
| 1231 | if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER) |
| 1232 | { |
| 1233 | buf = xrealloc (buf, blen = needed); |
| 1234 | result = get_token_information (token, TokenPrimaryGroup, |
| 1235 | (LPVOID)buf, blen, &needed); |
| 1236 | } |
| 1237 | if (result) |
| 1238 | { |
| 1239 | memcpy (&group_token, buf, sizeof (group_token)); |
| 1240 | dflt_passwd.pw_gid = get_rid (group_token.PrimaryGroup); |
| 1241 | dlength = sizeof (domain); |
| 1242 | /* If we can get at the real Primary Group name, use that. |
| 1243 | Otherwise, the default group name was already set to |
| 1244 | "None" in globals_of_w32. */ |
| 1245 | if (lookup_account_sid (NULL, group_token.PrimaryGroup, |
| 1246 | gname, &glength, NULL, &dlength, |
| 1247 | &user_type)) |
| 1248 | strcpy (dflt_group_name, gname); |
| 1249 | } |
| 1250 | else |
| 1251 | dflt_passwd.pw_gid = dflt_passwd.pw_uid; |
| 1252 | } |
| 1253 | } |
| 1254 | /* If security calls are not supported (presumably because we |
| 1255 | are running under Windows 9X), fallback to this: */ |
| 1256 | else if (GetUserName (uname, &ulength)) |
| 1257 | { |
| 1258 | strcpy (dflt_passwd.pw_name, uname); |
| 1259 | if (xstrcasecmp ("administrator", uname) == 0) |
| 1260 | dflt_passwd.pw_uid = 0; |
| 1261 | else |
| 1262 | dflt_passwd.pw_uid = 123; |
| 1263 | dflt_passwd.pw_gid = dflt_passwd.pw_uid; |
| 1264 | } |
| 1265 | else |
| 1266 | { |
| 1267 | strcpy (dflt_passwd.pw_name, "unknown"); |
| 1268 | dflt_passwd.pw_uid = 123; |
| 1269 | dflt_passwd.pw_gid = 123; |
| 1270 | } |
| 1271 | dflt_group.gr_gid = dflt_passwd.pw_gid; |
| 1272 | |
| 1273 | /* Ensure HOME and SHELL are defined. */ |
| 1274 | if (getenv ("HOME") == NULL) |
| 1275 | emacs_abort (); |
| 1276 | if (getenv ("SHELL") == NULL) |
| 1277 | emacs_abort (); |
| 1278 | |
| 1279 | /* Set dir and shell from environment variables. */ |
| 1280 | strcpy (dflt_passwd.pw_dir, getenv ("HOME")); |
| 1281 | strcpy (dflt_passwd.pw_shell, getenv ("SHELL")); |
| 1282 | |
| 1283 | xfree (buf); |
| 1284 | if (token) |
| 1285 | CloseHandle (token); |
| 1286 | } |
| 1287 | |
| 1288 | int |
| 1289 | random (void) |
| 1290 | { |
| 1291 | /* rand () on NT gives us 15 random bits...hack together 30 bits. */ |
| 1292 | return ((rand () << 15) | rand ()); |
| 1293 | } |
| 1294 | |
| 1295 | void |
| 1296 | srandom (int seed) |
| 1297 | { |
| 1298 | srand (seed); |
| 1299 | } |
| 1300 | |
| 1301 | |
| 1302 | /* Normalize filename by converting all path separators to |
| 1303 | the specified separator. Also conditionally convert upper |
| 1304 | case path name components to lower case. */ |
| 1305 | |
| 1306 | static void |
| 1307 | normalize_filename (register char *fp, char path_sep) |
| 1308 | { |
| 1309 | char sep; |
| 1310 | char *elem; |
| 1311 | |
| 1312 | /* Always lower-case drive letters a-z, even if the filesystem |
| 1313 | preserves case in filenames. |
| 1314 | This is so filenames can be compared by string comparison |
| 1315 | functions that are case-sensitive. Even case-preserving filesystems |
| 1316 | do not distinguish case in drive letters. */ |
| 1317 | if (fp[1] == ':' && *fp >= 'A' && *fp <= 'Z') |
| 1318 | { |
| 1319 | *fp += 'a' - 'A'; |
| 1320 | fp += 2; |
| 1321 | } |
| 1322 | |
| 1323 | if (NILP (Vw32_downcase_file_names)) |
| 1324 | { |
| 1325 | while (*fp) |
| 1326 | { |
| 1327 | if (*fp == '/' || *fp == '\\') |
| 1328 | *fp = path_sep; |
| 1329 | fp++; |
| 1330 | } |
| 1331 | return; |
| 1332 | } |
| 1333 | |
| 1334 | sep = path_sep; /* convert to this path separator */ |
| 1335 | elem = fp; /* start of current path element */ |
| 1336 | |
| 1337 | do { |
| 1338 | if (*fp >= 'a' && *fp <= 'z') |
| 1339 | elem = 0; /* don't convert this element */ |
| 1340 | |
| 1341 | if (*fp == 0 || *fp == ':') |
| 1342 | { |
| 1343 | sep = *fp; /* restore current separator (or 0) */ |
| 1344 | *fp = '/'; /* after conversion of this element */ |
| 1345 | } |
| 1346 | |
| 1347 | if (*fp == '/' || *fp == '\\') |
| 1348 | { |
| 1349 | if (elem && elem != fp) |
| 1350 | { |
| 1351 | *fp = 0; /* temporary end of string */ |
| 1352 | _strlwr (elem); /* while we convert to lower case */ |
| 1353 | } |
| 1354 | *fp = sep; /* convert (or restore) path separator */ |
| 1355 | elem = fp + 1; /* next element starts after separator */ |
| 1356 | sep = path_sep; |
| 1357 | } |
| 1358 | } while (*fp++); |
| 1359 | } |
| 1360 | |
| 1361 | /* Destructively turn backslashes into slashes. */ |
| 1362 | void |
| 1363 | dostounix_filename (register char *p) |
| 1364 | { |
| 1365 | normalize_filename (p, '/'); |
| 1366 | } |
| 1367 | |
| 1368 | /* Destructively turn slashes into backslashes. */ |
| 1369 | void |
| 1370 | unixtodos_filename (register char *p) |
| 1371 | { |
| 1372 | normalize_filename (p, '\\'); |
| 1373 | } |
| 1374 | |
| 1375 | /* Remove all CR's that are followed by a LF. |
| 1376 | (From msdos.c...probably should figure out a way to share it, |
| 1377 | although this code isn't going to ever change.) */ |
| 1378 | static int |
| 1379 | crlf_to_lf (register int n, register unsigned char *buf) |
| 1380 | { |
| 1381 | unsigned char *np = buf; |
| 1382 | unsigned char *startp = buf; |
| 1383 | unsigned char *endp = buf + n; |
| 1384 | |
| 1385 | if (n == 0) |
| 1386 | return n; |
| 1387 | while (buf < endp - 1) |
| 1388 | { |
| 1389 | if (*buf == 0x0d) |
| 1390 | { |
| 1391 | if (*(++buf) != 0x0a) |
| 1392 | *np++ = 0x0d; |
| 1393 | } |
| 1394 | else |
| 1395 | *np++ = *buf++; |
| 1396 | } |
| 1397 | if (buf < endp) |
| 1398 | *np++ = *buf++; |
| 1399 | return np - startp; |
| 1400 | } |
| 1401 | |
| 1402 | /* Parse the root part of file name, if present. Return length and |
| 1403 | optionally store pointer to char after root. */ |
| 1404 | static int |
| 1405 | parse_root (char * name, char ** pPath) |
| 1406 | { |
| 1407 | char * start = name; |
| 1408 | |
| 1409 | if (name == NULL) |
| 1410 | return 0; |
| 1411 | |
| 1412 | /* find the root name of the volume if given */ |
| 1413 | if (isalpha (name[0]) && name[1] == ':') |
| 1414 | { |
| 1415 | /* skip past drive specifier */ |
| 1416 | name += 2; |
| 1417 | if (IS_DIRECTORY_SEP (name[0])) |
| 1418 | name++; |
| 1419 | } |
| 1420 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) |
| 1421 | { |
| 1422 | int slashes = 2; |
| 1423 | name += 2; |
| 1424 | do |
| 1425 | { |
| 1426 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) |
| 1427 | break; |
| 1428 | name++; |
| 1429 | } |
| 1430 | while ( *name ); |
| 1431 | if (IS_DIRECTORY_SEP (name[0])) |
| 1432 | name++; |
| 1433 | } |
| 1434 | |
| 1435 | if (pPath) |
| 1436 | *pPath = name; |
| 1437 | |
| 1438 | return name - start; |
| 1439 | } |
| 1440 | |
| 1441 | /* Get long base name for name; name is assumed to be absolute. */ |
| 1442 | static int |
| 1443 | get_long_basename (char * name, char * buf, int size) |
| 1444 | { |
| 1445 | WIN32_FIND_DATA find_data; |
| 1446 | HANDLE dir_handle; |
| 1447 | int len = 0; |
| 1448 | |
| 1449 | /* must be valid filename, no wild cards or other invalid characters */ |
| 1450 | if (_mbspbrk (name, "*?|<>\"")) |
| 1451 | return 0; |
| 1452 | |
| 1453 | dir_handle = FindFirstFile (name, &find_data); |
| 1454 | if (dir_handle != INVALID_HANDLE_VALUE) |
| 1455 | { |
| 1456 | if ((len = strlen (find_data.cFileName)) < size) |
| 1457 | memcpy (buf, find_data.cFileName, len + 1); |
| 1458 | else |
| 1459 | len = 0; |
| 1460 | FindClose (dir_handle); |
| 1461 | } |
| 1462 | return len; |
| 1463 | } |
| 1464 | |
| 1465 | /* Get long name for file, if possible (assumed to be absolute). */ |
| 1466 | BOOL |
| 1467 | w32_get_long_filename (char * name, char * buf, int size) |
| 1468 | { |
| 1469 | char * o = buf; |
| 1470 | char * p; |
| 1471 | char * q; |
| 1472 | char full[ MAX_PATH ]; |
| 1473 | int len; |
| 1474 | |
| 1475 | len = strlen (name); |
| 1476 | if (len >= MAX_PATH) |
| 1477 | return FALSE; |
| 1478 | |
| 1479 | /* Use local copy for destructive modification. */ |
| 1480 | memcpy (full, name, len+1); |
| 1481 | unixtodos_filename (full); |
| 1482 | |
| 1483 | /* Copy root part verbatim. */ |
| 1484 | len = parse_root (full, &p); |
| 1485 | memcpy (o, full, len); |
| 1486 | o += len; |
| 1487 | *o = '\0'; |
| 1488 | size -= len; |
| 1489 | |
| 1490 | while (p != NULL && *p) |
| 1491 | { |
| 1492 | q = p; |
| 1493 | p = strchr (q, '\\'); |
| 1494 | if (p) *p = '\0'; |
| 1495 | len = get_long_basename (full, o, size); |
| 1496 | if (len > 0) |
| 1497 | { |
| 1498 | o += len; |
| 1499 | size -= len; |
| 1500 | if (p != NULL) |
| 1501 | { |
| 1502 | *p++ = '\\'; |
| 1503 | if (size < 2) |
| 1504 | return FALSE; |
| 1505 | *o++ = '\\'; |
| 1506 | size--; |
| 1507 | *o = '\0'; |
| 1508 | } |
| 1509 | } |
| 1510 | else |
| 1511 | return FALSE; |
| 1512 | } |
| 1513 | |
| 1514 | return TRUE; |
| 1515 | } |
| 1516 | |
| 1517 | static int |
| 1518 | is_unc_volume (const char *filename) |
| 1519 | { |
| 1520 | const char *ptr = filename; |
| 1521 | |
| 1522 | if (!IS_DIRECTORY_SEP (ptr[0]) || !IS_DIRECTORY_SEP (ptr[1]) || !ptr[2]) |
| 1523 | return 0; |
| 1524 | |
| 1525 | if (_mbspbrk (ptr + 2, "*?|<>\"\\/")) |
| 1526 | return 0; |
| 1527 | |
| 1528 | return 1; |
| 1529 | } |
| 1530 | |
| 1531 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
| 1532 | |
| 1533 | LPBYTE |
| 1534 | w32_get_resource (char *key, LPDWORD lpdwtype) |
| 1535 | { |
| 1536 | LPBYTE lpvalue; |
| 1537 | HKEY hrootkey = NULL; |
| 1538 | DWORD cbData; |
| 1539 | |
| 1540 | /* Check both the current user and the local machine to see if |
| 1541 | we have any resources. */ |
| 1542 | |
| 1543 | if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) |
| 1544 | { |
| 1545 | lpvalue = NULL; |
| 1546 | |
| 1547 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS |
| 1548 | && (lpvalue = xmalloc (cbData)) != NULL |
| 1549 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) |
| 1550 | { |
| 1551 | RegCloseKey (hrootkey); |
| 1552 | return (lpvalue); |
| 1553 | } |
| 1554 | |
| 1555 | xfree (lpvalue); |
| 1556 | |
| 1557 | RegCloseKey (hrootkey); |
| 1558 | } |
| 1559 | |
| 1560 | if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) |
| 1561 | { |
| 1562 | lpvalue = NULL; |
| 1563 | |
| 1564 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS |
| 1565 | && (lpvalue = xmalloc (cbData)) != NULL |
| 1566 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) |
| 1567 | { |
| 1568 | RegCloseKey (hrootkey); |
| 1569 | return (lpvalue); |
| 1570 | } |
| 1571 | |
| 1572 | xfree (lpvalue); |
| 1573 | |
| 1574 | RegCloseKey (hrootkey); |
| 1575 | } |
| 1576 | |
| 1577 | return (NULL); |
| 1578 | } |
| 1579 | |
| 1580 | char *get_emacs_configuration (void); |
| 1581 | |
| 1582 | void |
| 1583 | init_environment (char ** argv) |
| 1584 | { |
| 1585 | static const char * const tempdirs[] = { |
| 1586 | "$TMPDIR", "$TEMP", "$TMP", "c:/" |
| 1587 | }; |
| 1588 | |
| 1589 | int i; |
| 1590 | |
| 1591 | const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]); |
| 1592 | |
| 1593 | /* Make sure they have a usable $TMPDIR. Many Emacs functions use |
| 1594 | temporary files and assume "/tmp" if $TMPDIR is unset, which |
| 1595 | will break on DOS/Windows. Refuse to work if we cannot find |
| 1596 | a directory, not even "c:/", usable for that purpose. */ |
| 1597 | for (i = 0; i < imax ; i++) |
| 1598 | { |
| 1599 | const char *tmp = tempdirs[i]; |
| 1600 | |
| 1601 | if (*tmp == '$') |
| 1602 | tmp = getenv (tmp + 1); |
| 1603 | /* Note that `access' can lie to us if the directory resides on a |
| 1604 | read-only filesystem, like CD-ROM or a write-protected floppy. |
| 1605 | The only way to be really sure is to actually create a file and |
| 1606 | see if it succeeds. But I think that's too much to ask. */ |
| 1607 | |
| 1608 | /* MSVCRT's _access crashes with D_OK. */ |
| 1609 | if (tmp && sys_access (tmp, D_OK) == 0) |
| 1610 | { |
| 1611 | char * var = alloca (strlen (tmp) + 8); |
| 1612 | sprintf (var, "TMPDIR=%s", tmp); |
| 1613 | _putenv (strdup (var)); |
| 1614 | break; |
| 1615 | } |
| 1616 | } |
| 1617 | if (i >= imax) |
| 1618 | cmd_error_internal |
| 1619 | (Fcons (Qerror, |
| 1620 | Fcons (build_string ("no usable temporary directories found!!"), |
| 1621 | Qnil)), |
| 1622 | "While setting TMPDIR: "); |
| 1623 | |
| 1624 | /* Check for environment variables and use registry settings if they |
| 1625 | don't exist. Fallback on default values where applicable. */ |
| 1626 | { |
| 1627 | int i; |
| 1628 | LPBYTE lpval; |
| 1629 | DWORD dwType; |
| 1630 | char locale_name[32]; |
| 1631 | struct stat ignored; |
| 1632 | char default_home[MAX_PATH]; |
| 1633 | int appdata = 0; |
| 1634 | |
| 1635 | static const struct env_entry |
| 1636 | { |
| 1637 | char * name; |
| 1638 | char * def_value; |
| 1639 | } dflt_envvars[] = |
| 1640 | { |
| 1641 | /* If the default value is NULL, we will use the value from the |
| 1642 | outside environment or the Registry, but will not push the |
| 1643 | variable into the Emacs environment if it is defined neither |
| 1644 | in the Registry nor in the outside environment. */ |
| 1645 | {"HOME", "C:/"}, |
| 1646 | {"PRELOAD_WINSOCK", NULL}, |
| 1647 | {"emacs_dir", "C:/emacs"}, |
| 1648 | {"EMACSLOADPATH", NULL}, |
| 1649 | {"SHELL", "%emacs_dir%/bin/cmdproxy.exe"}, |
| 1650 | {"EMACSDATA", NULL}, |
| 1651 | {"EMACSPATH", NULL}, |
| 1652 | {"INFOPATH", NULL}, |
| 1653 | {"EMACSDOC", NULL}, |
| 1654 | {"TERM", "cmd"}, |
| 1655 | {"LANG", NULL}, |
| 1656 | }; |
| 1657 | |
| 1658 | #define N_ENV_VARS sizeof (dflt_envvars)/sizeof (dflt_envvars[0]) |
| 1659 | |
| 1660 | /* We need to copy dflt_envvars[] and work on the copy because we |
| 1661 | don't want the dumped Emacs to inherit the values of |
| 1662 | environment variables we saw during dumping (which could be on |
| 1663 | a different system). The defaults above must be left intact. */ |
| 1664 | struct env_entry env_vars[N_ENV_VARS]; |
| 1665 | |
| 1666 | for (i = 0; i < N_ENV_VARS; i++) |
| 1667 | env_vars[i] = dflt_envvars[i]; |
| 1668 | |
| 1669 | /* For backwards compatibility, check if a .emacs file exists in C:/ |
| 1670 | If not, then we can try to default to the appdata directory under the |
| 1671 | user's profile, which is more likely to be writable. */ |
| 1672 | if (stat ("C:/.emacs", &ignored) < 0) |
| 1673 | { |
| 1674 | HRESULT profile_result; |
| 1675 | /* Dynamically load ShGetFolderPath, as it won't exist on versions |
| 1676 | of Windows 95 and NT4 that have not been updated to include |
| 1677 | MSIE 5. */ |
| 1678 | ShGetFolderPath_fn get_folder_path; |
| 1679 | get_folder_path = (ShGetFolderPath_fn) |
| 1680 | GetProcAddress (GetModuleHandle ("shell32.dll"), "SHGetFolderPathA"); |
| 1681 | |
| 1682 | if (get_folder_path != NULL) |
| 1683 | { |
| 1684 | profile_result = get_folder_path (NULL, CSIDL_APPDATA, NULL, |
| 1685 | 0, default_home); |
| 1686 | |
| 1687 | /* If we can't get the appdata dir, revert to old behavior. */ |
| 1688 | if (profile_result == S_OK) |
| 1689 | { |
| 1690 | env_vars[0].def_value = default_home; |
| 1691 | appdata = 1; |
| 1692 | } |
| 1693 | } |
| 1694 | } |
| 1695 | |
| 1696 | /* Get default locale info and use it for LANG. */ |
| 1697 | if (GetLocaleInfo (LOCALE_USER_DEFAULT, |
| 1698 | LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP, |
| 1699 | locale_name, sizeof (locale_name))) |
| 1700 | { |
| 1701 | for (i = 0; i < N_ENV_VARS; i++) |
| 1702 | { |
| 1703 | if (strcmp (env_vars[i].name, "LANG") == 0) |
| 1704 | { |
| 1705 | env_vars[i].def_value = locale_name; |
| 1706 | break; |
| 1707 | } |
| 1708 | } |
| 1709 | } |
| 1710 | |
| 1711 | #define SET_ENV_BUF_SIZE (4 * MAX_PATH) /* to cover EMACSLOADPATH */ |
| 1712 | |
| 1713 | /* Treat emacs_dir specially: set it unconditionally based on our |
| 1714 | location. */ |
| 1715 | { |
| 1716 | char *p; |
| 1717 | char modname[MAX_PATH]; |
| 1718 | |
| 1719 | if (!GetModuleFileName (NULL, modname, MAX_PATH)) |
| 1720 | emacs_abort (); |
| 1721 | if ((p = strrchr (modname, '\\')) == NULL) |
| 1722 | emacs_abort (); |
| 1723 | *p = 0; |
| 1724 | |
| 1725 | if ((p = strrchr (modname, '\\')) && xstrcasecmp (p, "\\bin") == 0) |
| 1726 | { |
| 1727 | char buf[SET_ENV_BUF_SIZE]; |
| 1728 | |
| 1729 | *p = 0; |
| 1730 | for (p = modname; *p; p++) |
| 1731 | if (*p == '\\') *p = '/'; |
| 1732 | |
| 1733 | _snprintf (buf, sizeof (buf)-1, "emacs_dir=%s", modname); |
| 1734 | _putenv (strdup (buf)); |
| 1735 | } |
| 1736 | /* Handle running emacs from the build directory: src/oo-spd/i386/ */ |
| 1737 | |
| 1738 | /* FIXME: should use substring of get_emacs_configuration (). |
| 1739 | But I don't think the Windows build supports alpha, mips etc |
| 1740 | anymore, so have taken the easy option for now. */ |
| 1741 | else if (p && xstrcasecmp (p, "\\i386") == 0) |
| 1742 | { |
| 1743 | *p = 0; |
| 1744 | p = strrchr (modname, '\\'); |
| 1745 | if (p != NULL) |
| 1746 | { |
| 1747 | *p = 0; |
| 1748 | p = strrchr (modname, '\\'); |
| 1749 | if (p && xstrcasecmp (p, "\\src") == 0) |
| 1750 | { |
| 1751 | char buf[SET_ENV_BUF_SIZE]; |
| 1752 | |
| 1753 | *p = 0; |
| 1754 | for (p = modname; *p; p++) |
| 1755 | if (*p == '\\') *p = '/'; |
| 1756 | |
| 1757 | _snprintf (buf, sizeof (buf)-1, "emacs_dir=%s", modname); |
| 1758 | _putenv (strdup (buf)); |
| 1759 | } |
| 1760 | } |
| 1761 | } |
| 1762 | } |
| 1763 | |
| 1764 | for (i = 0; i < N_ENV_VARS; i++) |
| 1765 | { |
| 1766 | if (!getenv (env_vars[i].name)) |
| 1767 | { |
| 1768 | int dont_free = 0; |
| 1769 | |
| 1770 | if ((lpval = w32_get_resource (env_vars[i].name, &dwType)) == NULL |
| 1771 | /* Also ignore empty environment variables. */ |
| 1772 | || *lpval == 0) |
| 1773 | { |
| 1774 | xfree (lpval); |
| 1775 | lpval = env_vars[i].def_value; |
| 1776 | dwType = REG_EXPAND_SZ; |
| 1777 | dont_free = 1; |
| 1778 | if (!strcmp (env_vars[i].name, "HOME") && !appdata) |
| 1779 | Vdelayed_warnings_list |
| 1780 | = Fcons (listn (CONSTYPE_HEAP, 2, |
| 1781 | intern ("initialization"), |
| 1782 | build_string ("Setting HOME to C:\\ by default is deprecated")), |
| 1783 | Vdelayed_warnings_list); |
| 1784 | } |
| 1785 | |
| 1786 | if (lpval) |
| 1787 | { |
| 1788 | char buf1[SET_ENV_BUF_SIZE], buf2[SET_ENV_BUF_SIZE]; |
| 1789 | |
| 1790 | if (dwType == REG_EXPAND_SZ) |
| 1791 | ExpandEnvironmentStrings ((LPSTR) lpval, buf1, sizeof (buf1)); |
| 1792 | else if (dwType == REG_SZ) |
| 1793 | strcpy (buf1, lpval); |
| 1794 | if (dwType == REG_EXPAND_SZ || dwType == REG_SZ) |
| 1795 | { |
| 1796 | _snprintf (buf2, sizeof (buf2)-1, "%s=%s", env_vars[i].name, |
| 1797 | buf1); |
| 1798 | _putenv (strdup (buf2)); |
| 1799 | } |
| 1800 | |
| 1801 | if (!dont_free) |
| 1802 | xfree (lpval); |
| 1803 | } |
| 1804 | } |
| 1805 | } |
| 1806 | } |
| 1807 | |
| 1808 | /* Rebuild system configuration to reflect invoking system. */ |
| 1809 | Vsystem_configuration = build_string (EMACS_CONFIGURATION); |
| 1810 | |
| 1811 | /* Another special case: on NT, the PATH variable is actually named |
| 1812 | "Path" although cmd.exe (perhaps NT itself) arranges for |
| 1813 | environment variable lookup and setting to be case insensitive. |
| 1814 | However, Emacs assumes a fully case sensitive environment, so we |
| 1815 | need to change "Path" to "PATH" to match the expectations of |
| 1816 | various elisp packages. We do this by the sneaky method of |
| 1817 | modifying the string in the C runtime environ entry. |
| 1818 | |
| 1819 | The same applies to COMSPEC. */ |
| 1820 | { |
| 1821 | char ** envp; |
| 1822 | |
| 1823 | for (envp = environ; *envp; envp++) |
| 1824 | if (_strnicmp (*envp, "PATH=", 5) == 0) |
| 1825 | memcpy (*envp, "PATH=", 5); |
| 1826 | else if (_strnicmp (*envp, "COMSPEC=", 8) == 0) |
| 1827 | memcpy (*envp, "COMSPEC=", 8); |
| 1828 | } |
| 1829 | |
| 1830 | /* Remember the initial working directory for getwd. */ |
| 1831 | /* FIXME: Do we need to resolve possible symlinks in startup_dir? |
| 1832 | Does it matter anywhere in Emacs? */ |
| 1833 | if (!GetCurrentDirectory (MAXPATHLEN, startup_dir)) |
| 1834 | emacs_abort (); |
| 1835 | |
| 1836 | { |
| 1837 | static char modname[MAX_PATH]; |
| 1838 | |
| 1839 | if (!GetModuleFileName (NULL, modname, MAX_PATH)) |
| 1840 | emacs_abort (); |
| 1841 | argv[0] = modname; |
| 1842 | } |
| 1843 | |
| 1844 | /* Determine if there is a middle mouse button, to allow parse_button |
| 1845 | to decide whether right mouse events should be mouse-2 or |
| 1846 | mouse-3. */ |
| 1847 | w32_num_mouse_buttons = GetSystemMetrics (SM_CMOUSEBUTTONS); |
| 1848 | |
| 1849 | init_user_info (); |
| 1850 | } |
| 1851 | |
| 1852 | /* Called from expand-file-name when default-directory is not a string. */ |
| 1853 | |
| 1854 | char * |
| 1855 | emacs_root_dir (void) |
| 1856 | { |
| 1857 | static char root_dir[FILENAME_MAX]; |
| 1858 | const char *p; |
| 1859 | |
| 1860 | p = getenv ("emacs_dir"); |
| 1861 | if (p == NULL) |
| 1862 | emacs_abort (); |
| 1863 | strcpy (root_dir, p); |
| 1864 | root_dir[parse_root (root_dir, NULL)] = '\0'; |
| 1865 | dostounix_filename (root_dir); |
| 1866 | return root_dir; |
| 1867 | } |
| 1868 | |
| 1869 | /* We don't have scripts to automatically determine the system configuration |
| 1870 | for Emacs before it's compiled, and we don't want to have to make the |
| 1871 | user enter it, so we define EMACS_CONFIGURATION to invoke this runtime |
| 1872 | routine. */ |
| 1873 | |
| 1874 | char * |
| 1875 | get_emacs_configuration (void) |
| 1876 | { |
| 1877 | char *arch, *oem, *os; |
| 1878 | int build_num; |
| 1879 | static char configuration_buffer[32]; |
| 1880 | |
| 1881 | /* Determine the processor type. */ |
| 1882 | switch (get_processor_type ()) |
| 1883 | { |
| 1884 | |
| 1885 | #ifdef PROCESSOR_INTEL_386 |
| 1886 | case PROCESSOR_INTEL_386: |
| 1887 | case PROCESSOR_INTEL_486: |
| 1888 | case PROCESSOR_INTEL_PENTIUM: |
| 1889 | arch = "i386"; |
| 1890 | break; |
| 1891 | #endif |
| 1892 | |
| 1893 | #ifdef PROCESSOR_MIPS_R2000 |
| 1894 | case PROCESSOR_MIPS_R2000: |
| 1895 | case PROCESSOR_MIPS_R3000: |
| 1896 | case PROCESSOR_MIPS_R4000: |
| 1897 | arch = "mips"; |
| 1898 | break; |
| 1899 | #endif |
| 1900 | |
| 1901 | #ifdef PROCESSOR_ALPHA_21064 |
| 1902 | case PROCESSOR_ALPHA_21064: |
| 1903 | arch = "alpha"; |
| 1904 | break; |
| 1905 | #endif |
| 1906 | |
| 1907 | default: |
| 1908 | arch = "unknown"; |
| 1909 | break; |
| 1910 | } |
| 1911 | |
| 1912 | /* Use the OEM field to reflect the compiler/library combination. */ |
| 1913 | #ifdef _MSC_VER |
| 1914 | #define COMPILER_NAME "msvc" |
| 1915 | #else |
| 1916 | #ifdef __GNUC__ |
| 1917 | #define COMPILER_NAME "mingw" |
| 1918 | #else |
| 1919 | #define COMPILER_NAME "unknown" |
| 1920 | #endif |
| 1921 | #endif |
| 1922 | oem = COMPILER_NAME; |
| 1923 | |
| 1924 | switch (osinfo_cache.dwPlatformId) { |
| 1925 | case VER_PLATFORM_WIN32_NT: |
| 1926 | os = "nt"; |
| 1927 | build_num = osinfo_cache.dwBuildNumber; |
| 1928 | break; |
| 1929 | case VER_PLATFORM_WIN32_WINDOWS: |
| 1930 | if (osinfo_cache.dwMinorVersion == 0) { |
| 1931 | os = "windows95"; |
| 1932 | } else { |
| 1933 | os = "windows98"; |
| 1934 | } |
| 1935 | build_num = LOWORD (osinfo_cache.dwBuildNumber); |
| 1936 | break; |
| 1937 | case VER_PLATFORM_WIN32s: |
| 1938 | /* Not supported, should not happen. */ |
| 1939 | os = "windows32s"; |
| 1940 | build_num = LOWORD (osinfo_cache.dwBuildNumber); |
| 1941 | break; |
| 1942 | default: |
| 1943 | os = "unknown"; |
| 1944 | build_num = 0; |
| 1945 | break; |
| 1946 | } |
| 1947 | |
| 1948 | if (osinfo_cache.dwPlatformId == VER_PLATFORM_WIN32_NT) { |
| 1949 | sprintf (configuration_buffer, "%s-%s-%s%d.%d.%d", arch, oem, os, |
| 1950 | get_w32_major_version (), get_w32_minor_version (), build_num); |
| 1951 | } else { |
| 1952 | sprintf (configuration_buffer, "%s-%s-%s.%d", arch, oem, os, build_num); |
| 1953 | } |
| 1954 | |
| 1955 | return configuration_buffer; |
| 1956 | } |
| 1957 | |
| 1958 | char * |
| 1959 | get_emacs_configuration_options (void) |
| 1960 | { |
| 1961 | static char *options_buffer; |
| 1962 | char cv[32]; /* Enough for COMPILER_VERSION. */ |
| 1963 | char *options[] = { |
| 1964 | cv, /* To be filled later. */ |
| 1965 | #ifdef EMACSDEBUG |
| 1966 | " --no-opt", |
| 1967 | #endif |
| 1968 | #ifdef ENABLE_CHECKING |
| 1969 | " --enable-checking", |
| 1970 | #endif |
| 1971 | /* configure.bat already sets USER_CFLAGS and USER_LDFLAGS |
| 1972 | with a starting space to save work here. */ |
| 1973 | #ifdef USER_CFLAGS |
| 1974 | " --cflags", USER_CFLAGS, |
| 1975 | #endif |
| 1976 | #ifdef USER_LDFLAGS |
| 1977 | " --ldflags", USER_LDFLAGS, |
| 1978 | #endif |
| 1979 | NULL |
| 1980 | }; |
| 1981 | size_t size = 0; |
| 1982 | int i; |
| 1983 | |
| 1984 | /* Work out the effective configure options for this build. */ |
| 1985 | #ifdef _MSC_VER |
| 1986 | #define COMPILER_VERSION "--with-msvc (%d.%02d)", _MSC_VER / 100, _MSC_VER % 100 |
| 1987 | #else |
| 1988 | #ifdef __GNUC__ |
| 1989 | #define COMPILER_VERSION "--with-gcc (%d.%d)", __GNUC__, __GNUC_MINOR__ |
| 1990 | #else |
| 1991 | #define COMPILER_VERSION "" |
| 1992 | #endif |
| 1993 | #endif |
| 1994 | |
| 1995 | if (_snprintf (cv, sizeof (cv) - 1, COMPILER_VERSION) < 0) |
| 1996 | return "Error: not enough space for compiler version"; |
| 1997 | cv[sizeof (cv) - 1] = '\0'; |
| 1998 | |
| 1999 | for (i = 0; options[i]; i++) |
| 2000 | size += strlen (options[i]); |
| 2001 | |
| 2002 | options_buffer = xmalloc (size + 1); |
| 2003 | options_buffer[0] = '\0'; |
| 2004 | |
| 2005 | for (i = 0; options[i]; i++) |
| 2006 | strcat (options_buffer, options[i]); |
| 2007 | |
| 2008 | return options_buffer; |
| 2009 | } |
| 2010 | |
| 2011 | |
| 2012 | #include <sys/timeb.h> |
| 2013 | |
| 2014 | /* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */ |
| 2015 | void |
| 2016 | gettimeofday (struct timeval *tv, struct timezone *tz) |
| 2017 | { |
| 2018 | struct _timeb tb; |
| 2019 | _ftime (&tb); |
| 2020 | |
| 2021 | tv->tv_sec = tb.time; |
| 2022 | tv->tv_usec = tb.millitm * 1000L; |
| 2023 | /* Implementation note: _ftime sometimes doesn't update the dstflag |
| 2024 | according to the new timezone when the system timezone is |
| 2025 | changed. We could fix that by using GetSystemTime and |
| 2026 | GetTimeZoneInformation, but that doesn't seem necessary, since |
| 2027 | Emacs always calls gettimeofday with the 2nd argument NULL (see |
| 2028 | current_emacs_time). */ |
| 2029 | if (tz) |
| 2030 | { |
| 2031 | tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */ |
| 2032 | tz->tz_dsttime = tb.dstflag; /* type of dst correction */ |
| 2033 | } |
| 2034 | } |
| 2035 | |
| 2036 | /* Emulate fdutimens. */ |
| 2037 | |
| 2038 | /* Set the access and modification time stamps of FD (a.k.a. FILE) to be |
| 2039 | TIMESPEC[0] and TIMESPEC[1], respectively. |
| 2040 | FD must be either negative -- in which case it is ignored -- |
| 2041 | or a file descriptor that is open on FILE. |
| 2042 | If FD is nonnegative, then FILE can be NULL, which means |
| 2043 | use just futimes instead of utimes. |
| 2044 | If TIMESPEC is null, FAIL. |
| 2045 | Return 0 on success, -1 (setting errno) on failure. */ |
| 2046 | |
| 2047 | int |
| 2048 | fdutimens (int fd, char const *file, struct timespec const timespec[2]) |
| 2049 | { |
| 2050 | struct _utimbuf ut; |
| 2051 | |
| 2052 | if (!timespec) |
| 2053 | { |
| 2054 | errno = ENOSYS; |
| 2055 | return -1; |
| 2056 | } |
| 2057 | if (fd < 0 && !file) |
| 2058 | { |
| 2059 | errno = EBADF; |
| 2060 | return -1; |
| 2061 | } |
| 2062 | ut.actime = timespec[0].tv_sec; |
| 2063 | ut.modtime = timespec[1].tv_sec; |
| 2064 | if (fd >= 0) |
| 2065 | return _futime (fd, &ut); |
| 2066 | else |
| 2067 | return _utime (file, &ut); |
| 2068 | } |
| 2069 | |
| 2070 | |
| 2071 | /* ------------------------------------------------------------------------- */ |
| 2072 | /* IO support and wrapper functions for the Windows API. */ |
| 2073 | /* ------------------------------------------------------------------------- */ |
| 2074 | |
| 2075 | /* Place a wrapper around the MSVC version of ctime. It returns NULL |
| 2076 | on network directories, so we handle that case here. |
| 2077 | (Ulrich Leodolter, 1/11/95). */ |
| 2078 | char * |
| 2079 | sys_ctime (const time_t *t) |
| 2080 | { |
| 2081 | char *str = (char *) ctime (t); |
| 2082 | return (str ? str : "Sun Jan 01 00:00:00 1970"); |
| 2083 | } |
| 2084 | |
| 2085 | /* Emulate sleep...we could have done this with a define, but that |
| 2086 | would necessitate including windows.h in the files that used it. |
| 2087 | This is much easier. */ |
| 2088 | void |
| 2089 | sys_sleep (int seconds) |
| 2090 | { |
| 2091 | Sleep (seconds * 1000); |
| 2092 | } |
| 2093 | |
| 2094 | /* Internal MSVC functions for low-level descriptor munging */ |
| 2095 | extern int __cdecl _set_osfhnd (int fd, long h); |
| 2096 | extern int __cdecl _free_osfhnd (int fd); |
| 2097 | |
| 2098 | /* parallel array of private info on file handles */ |
| 2099 | filedesc fd_info [ MAXDESC ]; |
| 2100 | |
| 2101 | typedef struct volume_info_data { |
| 2102 | struct volume_info_data * next; |
| 2103 | |
| 2104 | /* time when info was obtained */ |
| 2105 | DWORD timestamp; |
| 2106 | |
| 2107 | /* actual volume info */ |
| 2108 | char * root_dir; |
| 2109 | DWORD serialnum; |
| 2110 | DWORD maxcomp; |
| 2111 | DWORD flags; |
| 2112 | char * name; |
| 2113 | char * type; |
| 2114 | } volume_info_data; |
| 2115 | |
| 2116 | /* Global referenced by various functions. */ |
| 2117 | static volume_info_data volume_info; |
| 2118 | |
| 2119 | /* Vector to indicate which drives are local and fixed (for which cached |
| 2120 | data never expires). */ |
| 2121 | static BOOL fixed_drives[26]; |
| 2122 | |
| 2123 | /* Consider cached volume information to be stale if older than 10s, |
| 2124 | at least for non-local drives. Info for fixed drives is never stale. */ |
| 2125 | #define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' ) |
| 2126 | #define VOLINFO_STILL_VALID( root_dir, info ) \ |
| 2127 | ( ( isalpha (root_dir[0]) && \ |
| 2128 | fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \ |
| 2129 | || GetTickCount () - info->timestamp < 10000 ) |
| 2130 | |
| 2131 | /* Cache support functions. */ |
| 2132 | |
| 2133 | /* Simple linked list with linear search is sufficient. */ |
| 2134 | static volume_info_data *volume_cache = NULL; |
| 2135 | |
| 2136 | static volume_info_data * |
| 2137 | lookup_volume_info (char * root_dir) |
| 2138 | { |
| 2139 | volume_info_data * info; |
| 2140 | |
| 2141 | for (info = volume_cache; info; info = info->next) |
| 2142 | if (xstrcasecmp (info->root_dir, root_dir) == 0) |
| 2143 | break; |
| 2144 | return info; |
| 2145 | } |
| 2146 | |
| 2147 | static void |
| 2148 | add_volume_info (char * root_dir, volume_info_data * info) |
| 2149 | { |
| 2150 | info->root_dir = xstrdup (root_dir); |
| 2151 | info->next = volume_cache; |
| 2152 | volume_cache = info; |
| 2153 | } |
| 2154 | |
| 2155 | |
| 2156 | /* Wrapper for GetVolumeInformation, which uses caching to avoid |
| 2157 | performance penalty (~2ms on 486 for local drives, 7.5ms for local |
| 2158 | cdrom drive, ~5-10ms or more for remote drives on LAN). */ |
| 2159 | static volume_info_data * |
| 2160 | GetCachedVolumeInformation (char * root_dir) |
| 2161 | { |
| 2162 | volume_info_data * info; |
| 2163 | char default_root[ MAX_PATH ]; |
| 2164 | |
| 2165 | /* NULL for root_dir means use root from current directory. */ |
| 2166 | if (root_dir == NULL) |
| 2167 | { |
| 2168 | if (GetCurrentDirectory (MAX_PATH, default_root) == 0) |
| 2169 | return NULL; |
| 2170 | parse_root (default_root, &root_dir); |
| 2171 | *root_dir = 0; |
| 2172 | root_dir = default_root; |
| 2173 | } |
| 2174 | |
| 2175 | /* Local fixed drives can be cached permanently. Removable drives |
| 2176 | cannot be cached permanently, since the volume name and serial |
| 2177 | number (if nothing else) can change. Remote drives should be |
| 2178 | treated as if they are removable, since there is no sure way to |
| 2179 | tell whether they are or not. Also, the UNC association of drive |
| 2180 | letters mapped to remote volumes can be changed at any time (even |
| 2181 | by other processes) without notice. |
| 2182 | |
| 2183 | As a compromise, so we can benefit from caching info for remote |
| 2184 | volumes, we use a simple expiry mechanism to invalidate cache |
| 2185 | entries that are more than ten seconds old. */ |
| 2186 | |
| 2187 | #if 0 |
| 2188 | /* No point doing this, because WNetGetConnection is even slower than |
| 2189 | GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW, |
| 2190 | GetDriveType is about the only call of this type which does not |
| 2191 | involve network access, and so is extremely quick). */ |
| 2192 | |
| 2193 | /* Map drive letter to UNC if remote. */ |
| 2194 | if (isalpha (root_dir[0]) && !fixed[DRIVE_INDEX (root_dir[0])]) |
| 2195 | { |
| 2196 | char remote_name[ 256 ]; |
| 2197 | char drive[3] = { root_dir[0], ':' }; |
| 2198 | |
| 2199 | if (WNetGetConnection (drive, remote_name, sizeof (remote_name)) |
| 2200 | == NO_ERROR) |
| 2201 | /* do something */ ; |
| 2202 | } |
| 2203 | #endif |
| 2204 | |
| 2205 | info = lookup_volume_info (root_dir); |
| 2206 | |
| 2207 | if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info)) |
| 2208 | { |
| 2209 | char name[ 256 ]; |
| 2210 | DWORD serialnum; |
| 2211 | DWORD maxcomp; |
| 2212 | DWORD flags; |
| 2213 | char type[ 256 ]; |
| 2214 | |
| 2215 | /* Info is not cached, or is stale. */ |
| 2216 | if (!GetVolumeInformation (root_dir, |
| 2217 | name, sizeof (name), |
| 2218 | &serialnum, |
| 2219 | &maxcomp, |
| 2220 | &flags, |
| 2221 | type, sizeof (type))) |
| 2222 | return NULL; |
| 2223 | |
| 2224 | /* Cache the volume information for future use, overwriting existing |
| 2225 | entry if present. */ |
| 2226 | if (info == NULL) |
| 2227 | { |
| 2228 | info = xmalloc (sizeof (volume_info_data)); |
| 2229 | add_volume_info (root_dir, info); |
| 2230 | } |
| 2231 | else |
| 2232 | { |
| 2233 | xfree (info->name); |
| 2234 | xfree (info->type); |
| 2235 | } |
| 2236 | |
| 2237 | info->name = xstrdup (name); |
| 2238 | info->serialnum = serialnum; |
| 2239 | info->maxcomp = maxcomp; |
| 2240 | info->flags = flags; |
| 2241 | info->type = xstrdup (type); |
| 2242 | info->timestamp = GetTickCount (); |
| 2243 | } |
| 2244 | |
| 2245 | return info; |
| 2246 | } |
| 2247 | |
| 2248 | /* Get information on the volume where NAME is held; set path pointer to |
| 2249 | start of pathname in NAME (past UNC header\volume header if present), |
| 2250 | if pPath is non-NULL. |
| 2251 | |
| 2252 | Note: if NAME includes symlinks, the information is for the volume |
| 2253 | of the symlink, not of its target. That's because, even though |
| 2254 | GetVolumeInformation returns information about the symlink target |
| 2255 | of its argument, we only pass the root directory to |
| 2256 | GetVolumeInformation, not the full NAME. */ |
| 2257 | static int |
| 2258 | get_volume_info (const char * name, const char ** pPath) |
| 2259 | { |
| 2260 | char temp[MAX_PATH]; |
| 2261 | char *rootname = NULL; /* default to current volume */ |
| 2262 | volume_info_data * info; |
| 2263 | |
| 2264 | if (name == NULL) |
| 2265 | return FALSE; |
| 2266 | |
| 2267 | /* Find the root name of the volume if given. */ |
| 2268 | if (isalpha (name[0]) && name[1] == ':') |
| 2269 | { |
| 2270 | rootname = temp; |
| 2271 | temp[0] = *name++; |
| 2272 | temp[1] = *name++; |
| 2273 | temp[2] = '\\'; |
| 2274 | temp[3] = 0; |
| 2275 | } |
| 2276 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) |
| 2277 | { |
| 2278 | char *str = temp; |
| 2279 | int slashes = 4; |
| 2280 | rootname = temp; |
| 2281 | do |
| 2282 | { |
| 2283 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) |
| 2284 | break; |
| 2285 | *str++ = *name++; |
| 2286 | } |
| 2287 | while ( *name ); |
| 2288 | |
| 2289 | *str++ = '\\'; |
| 2290 | *str = 0; |
| 2291 | } |
| 2292 | |
| 2293 | if (pPath) |
| 2294 | *pPath = name; |
| 2295 | |
| 2296 | info = GetCachedVolumeInformation (rootname); |
| 2297 | if (info != NULL) |
| 2298 | { |
| 2299 | /* Set global referenced by other functions. */ |
| 2300 | volume_info = *info; |
| 2301 | return TRUE; |
| 2302 | } |
| 2303 | return FALSE; |
| 2304 | } |
| 2305 | |
| 2306 | /* Determine if volume is FAT format (ie. only supports short 8.3 |
| 2307 | names); also set path pointer to start of pathname in name, if |
| 2308 | pPath is non-NULL. */ |
| 2309 | static int |
| 2310 | is_fat_volume (const char * name, const char ** pPath) |
| 2311 | { |
| 2312 | if (get_volume_info (name, pPath)) |
| 2313 | return (volume_info.maxcomp == 12); |
| 2314 | return FALSE; |
| 2315 | } |
| 2316 | |
| 2317 | /* Map filename to a valid 8.3 name if necessary. |
| 2318 | The result is a pointer to a static buffer, so CAVEAT EMPTOR! */ |
| 2319 | const char * |
| 2320 | map_w32_filename (const char * name, const char ** pPath) |
| 2321 | { |
| 2322 | static char shortname[MAX_PATH]; |
| 2323 | char * str = shortname; |
| 2324 | char c; |
| 2325 | char * path; |
| 2326 | const char * save_name = name; |
| 2327 | |
| 2328 | if (strlen (name) >= MAX_PATH) |
| 2329 | { |
| 2330 | /* Return a filename which will cause callers to fail. */ |
| 2331 | strcpy (shortname, "?"); |
| 2332 | return shortname; |
| 2333 | } |
| 2334 | |
| 2335 | if (is_fat_volume (name, (const char **)&path)) /* truncate to 8.3 */ |
| 2336 | { |
| 2337 | register int left = 8; /* maximum number of chars in part */ |
| 2338 | register int extn = 0; /* extension added? */ |
| 2339 | register int dots = 2; /* maximum number of dots allowed */ |
| 2340 | |
| 2341 | while (name < path) |
| 2342 | *str++ = *name++; /* skip past UNC header */ |
| 2343 | |
| 2344 | while ((c = *name++)) |
| 2345 | { |
| 2346 | switch ( c ) |
| 2347 | { |
| 2348 | case ':': |
| 2349 | case '\\': |
| 2350 | case '/': |
| 2351 | *str++ = (c == ':' ? ':' : '\\'); |
| 2352 | extn = 0; /* reset extension flags */ |
| 2353 | dots = 2; /* max 2 dots */ |
| 2354 | left = 8; /* max length 8 for main part */ |
| 2355 | break; |
| 2356 | case '.': |
| 2357 | if ( dots ) |
| 2358 | { |
| 2359 | /* Convert path components of the form .xxx to _xxx, |
| 2360 | but leave . and .. as they are. This allows .emacs |
| 2361 | to be read as _emacs, for example. */ |
| 2362 | |
| 2363 | if (! *name || |
| 2364 | *name == '.' || |
| 2365 | IS_DIRECTORY_SEP (*name)) |
| 2366 | { |
| 2367 | *str++ = '.'; |
| 2368 | dots--; |
| 2369 | } |
| 2370 | else |
| 2371 | { |
| 2372 | *str++ = '_'; |
| 2373 | left--; |
| 2374 | dots = 0; |
| 2375 | } |
| 2376 | } |
| 2377 | else if ( !extn ) |
| 2378 | { |
| 2379 | *str++ = '.'; |
| 2380 | extn = 1; /* we've got an extension */ |
| 2381 | left = 3; /* 3 chars in extension */ |
| 2382 | } |
| 2383 | else |
| 2384 | { |
| 2385 | /* any embedded dots after the first are converted to _ */ |
| 2386 | *str++ = '_'; |
| 2387 | } |
| 2388 | break; |
| 2389 | case '~': |
| 2390 | case '#': /* don't lose these, they're important */ |
| 2391 | if ( ! left ) |
| 2392 | str[-1] = c; /* replace last character of part */ |
| 2393 | /* FALLTHRU */ |
| 2394 | default: |
| 2395 | if ( left ) |
| 2396 | { |
| 2397 | *str++ = tolower (c); /* map to lower case (looks nicer) */ |
| 2398 | left--; |
| 2399 | dots = 0; /* started a path component */ |
| 2400 | } |
| 2401 | break; |
| 2402 | } |
| 2403 | } |
| 2404 | *str = '\0'; |
| 2405 | } |
| 2406 | else |
| 2407 | { |
| 2408 | strcpy (shortname, name); |
| 2409 | unixtodos_filename (shortname); |
| 2410 | } |
| 2411 | |
| 2412 | if (pPath) |
| 2413 | *pPath = shortname + (path - save_name); |
| 2414 | |
| 2415 | return shortname; |
| 2416 | } |
| 2417 | |
| 2418 | static int |
| 2419 | is_exec (const char * name) |
| 2420 | { |
| 2421 | char * p = strrchr (name, '.'); |
| 2422 | return |
| 2423 | (p != NULL |
| 2424 | && (xstrcasecmp (p, ".exe") == 0 || |
| 2425 | xstrcasecmp (p, ".com") == 0 || |
| 2426 | xstrcasecmp (p, ".bat") == 0 || |
| 2427 | xstrcasecmp (p, ".cmd") == 0)); |
| 2428 | } |
| 2429 | |
| 2430 | /* Emulate the Unix directory procedures opendir, closedir, |
| 2431 | and readdir. We can't use the procedures supplied in sysdep.c, |
| 2432 | so we provide them here. */ |
| 2433 | |
| 2434 | struct direct dir_static; /* simulated directory contents */ |
| 2435 | static HANDLE dir_find_handle = INVALID_HANDLE_VALUE; |
| 2436 | static int dir_is_fat; |
| 2437 | static char dir_pathname[MAXPATHLEN+1]; |
| 2438 | static WIN32_FIND_DATA dir_find_data; |
| 2439 | |
| 2440 | /* Support shares on a network resource as subdirectories of a read-only |
| 2441 | root directory. */ |
| 2442 | static HANDLE wnet_enum_handle = INVALID_HANDLE_VALUE; |
| 2443 | static HANDLE open_unc_volume (const char *); |
| 2444 | static char *read_unc_volume (HANDLE, char *, int); |
| 2445 | static void close_unc_volume (HANDLE); |
| 2446 | |
| 2447 | DIR * |
| 2448 | opendir (char *filename) |
| 2449 | { |
| 2450 | DIR *dirp; |
| 2451 | |
| 2452 | /* Opening is done by FindFirstFile. However, a read is inherent to |
| 2453 | this operation, so we defer the open until read time. */ |
| 2454 | |
| 2455 | if (dir_find_handle != INVALID_HANDLE_VALUE) |
| 2456 | return NULL; |
| 2457 | if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
| 2458 | return NULL; |
| 2459 | |
| 2460 | /* Note: We don't support traversal of UNC volumes via symlinks. |
| 2461 | Doing so would mean punishing 99.99% of use cases by resolving |
| 2462 | all the possible symlinks in FILENAME, recursively. */ |
| 2463 | if (is_unc_volume (filename)) |
| 2464 | { |
| 2465 | wnet_enum_handle = open_unc_volume (filename); |
| 2466 | if (wnet_enum_handle == INVALID_HANDLE_VALUE) |
| 2467 | return NULL; |
| 2468 | } |
| 2469 | |
| 2470 | if (!(dirp = (DIR *) malloc (sizeof (DIR)))) |
| 2471 | return NULL; |
| 2472 | |
| 2473 | dirp->dd_fd = 0; |
| 2474 | dirp->dd_loc = 0; |
| 2475 | dirp->dd_size = 0; |
| 2476 | |
| 2477 | strncpy (dir_pathname, map_w32_filename (filename, NULL), MAXPATHLEN); |
| 2478 | dir_pathname[MAXPATHLEN] = '\0'; |
| 2479 | /* Note: We don't support symlinks to file names on FAT volumes. |
| 2480 | Doing so would mean punishing 99.99% of use cases by resolving |
| 2481 | all the possible symlinks in FILENAME, recursively. */ |
| 2482 | dir_is_fat = is_fat_volume (filename, NULL); |
| 2483 | |
| 2484 | return dirp; |
| 2485 | } |
| 2486 | |
| 2487 | void |
| 2488 | closedir (DIR *dirp) |
| 2489 | { |
| 2490 | /* If we have a find-handle open, close it. */ |
| 2491 | if (dir_find_handle != INVALID_HANDLE_VALUE) |
| 2492 | { |
| 2493 | FindClose (dir_find_handle); |
| 2494 | dir_find_handle = INVALID_HANDLE_VALUE; |
| 2495 | } |
| 2496 | else if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
| 2497 | { |
| 2498 | close_unc_volume (wnet_enum_handle); |
| 2499 | wnet_enum_handle = INVALID_HANDLE_VALUE; |
| 2500 | } |
| 2501 | xfree ((char *) dirp); |
| 2502 | } |
| 2503 | |
| 2504 | struct direct * |
| 2505 | readdir (DIR *dirp) |
| 2506 | { |
| 2507 | int downcase = !NILP (Vw32_downcase_file_names); |
| 2508 | |
| 2509 | if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
| 2510 | { |
| 2511 | if (!read_unc_volume (wnet_enum_handle, |
| 2512 | dir_find_data.cFileName, |
| 2513 | MAX_PATH)) |
| 2514 | return NULL; |
| 2515 | } |
| 2516 | /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */ |
| 2517 | else if (dir_find_handle == INVALID_HANDLE_VALUE) |
| 2518 | { |
| 2519 | char filename[MAXNAMLEN + 3]; |
| 2520 | int ln; |
| 2521 | |
| 2522 | strcpy (filename, dir_pathname); |
| 2523 | ln = strlen (filename) - 1; |
| 2524 | if (!IS_DIRECTORY_SEP (filename[ln])) |
| 2525 | strcat (filename, "\\"); |
| 2526 | strcat (filename, "*"); |
| 2527 | |
| 2528 | /* Note: No need to resolve symlinks in FILENAME, because |
| 2529 | FindFirst opens the directory that is the target of a |
| 2530 | symlink. */ |
| 2531 | dir_find_handle = FindFirstFile (filename, &dir_find_data); |
| 2532 | |
| 2533 | if (dir_find_handle == INVALID_HANDLE_VALUE) |
| 2534 | return NULL; |
| 2535 | } |
| 2536 | else |
| 2537 | { |
| 2538 | if (!FindNextFile (dir_find_handle, &dir_find_data)) |
| 2539 | return NULL; |
| 2540 | } |
| 2541 | |
| 2542 | /* Emacs never uses this value, so don't bother making it match |
| 2543 | value returned by stat(). */ |
| 2544 | dir_static.d_ino = 1; |
| 2545 | |
| 2546 | strcpy (dir_static.d_name, dir_find_data.cFileName); |
| 2547 | |
| 2548 | /* If the file name in cFileName[] includes `?' characters, it means |
| 2549 | the original file name used characters that cannot be represented |
| 2550 | by the current ANSI codepage. To avoid total lossage, retrieve |
| 2551 | the short 8+3 alias of the long file name. */ |
| 2552 | if (_mbspbrk (dir_static.d_name, "?")) |
| 2553 | { |
| 2554 | strcpy (dir_static.d_name, dir_find_data.cAlternateFileName); |
| 2555 | downcase = 1; /* 8+3 aliases are returned in all caps */ |
| 2556 | } |
| 2557 | dir_static.d_namlen = strlen (dir_static.d_name); |
| 2558 | dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 + |
| 2559 | dir_static.d_namlen - dir_static.d_namlen % 4; |
| 2560 | |
| 2561 | /* If the file name in cFileName[] includes `?' characters, it means |
| 2562 | the original file name used characters that cannot be represented |
| 2563 | by the current ANSI codepage. To avoid total lossage, retrieve |
| 2564 | the short 8+3 alias of the long file name. */ |
| 2565 | if (_mbspbrk (dir_find_data.cFileName, "?")) |
| 2566 | { |
| 2567 | strcpy (dir_static.d_name, dir_find_data.cAlternateFileName); |
| 2568 | /* 8+3 aliases are returned in all caps, which could break |
| 2569 | various alists that look at filenames' extensions. */ |
| 2570 | downcase = 1; |
| 2571 | } |
| 2572 | else |
| 2573 | strcpy (dir_static.d_name, dir_find_data.cFileName); |
| 2574 | dir_static.d_namlen = strlen (dir_static.d_name); |
| 2575 | if (dir_is_fat) |
| 2576 | _strlwr (dir_static.d_name); |
| 2577 | else if (downcase) |
| 2578 | { |
| 2579 | register char *p; |
| 2580 | for (p = dir_static.d_name; *p; p++) |
| 2581 | if (*p >= 'a' && *p <= 'z') |
| 2582 | break; |
| 2583 | if (!*p) |
| 2584 | _strlwr (dir_static.d_name); |
| 2585 | } |
| 2586 | |
| 2587 | return &dir_static; |
| 2588 | } |
| 2589 | |
| 2590 | static HANDLE |
| 2591 | open_unc_volume (const char *path) |
| 2592 | { |
| 2593 | NETRESOURCE nr; |
| 2594 | HANDLE henum; |
| 2595 | int result; |
| 2596 | |
| 2597 | nr.dwScope = RESOURCE_GLOBALNET; |
| 2598 | nr.dwType = RESOURCETYPE_DISK; |
| 2599 | nr.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER; |
| 2600 | nr.dwUsage = RESOURCEUSAGE_CONTAINER; |
| 2601 | nr.lpLocalName = NULL; |
| 2602 | nr.lpRemoteName = (LPSTR)map_w32_filename (path, NULL); |
| 2603 | nr.lpComment = NULL; |
| 2604 | nr.lpProvider = NULL; |
| 2605 | |
| 2606 | result = WNetOpenEnum (RESOURCE_GLOBALNET, RESOURCETYPE_DISK, |
| 2607 | RESOURCEUSAGE_CONNECTABLE, &nr, &henum); |
| 2608 | |
| 2609 | if (result == NO_ERROR) |
| 2610 | return henum; |
| 2611 | else |
| 2612 | return INVALID_HANDLE_VALUE; |
| 2613 | } |
| 2614 | |
| 2615 | static char * |
| 2616 | read_unc_volume (HANDLE henum, char *readbuf, int size) |
| 2617 | { |
| 2618 | DWORD count; |
| 2619 | int result; |
| 2620 | DWORD bufsize = 512; |
| 2621 | char *buffer; |
| 2622 | char *ptr; |
| 2623 | |
| 2624 | count = 1; |
| 2625 | buffer = alloca (bufsize); |
| 2626 | result = WNetEnumResource (henum, &count, buffer, &bufsize); |
| 2627 | if (result != NO_ERROR) |
| 2628 | return NULL; |
| 2629 | |
| 2630 | /* WNetEnumResource returns \\resource\share...skip forward to "share". */ |
| 2631 | ptr = ((LPNETRESOURCE) buffer)->lpRemoteName; |
| 2632 | ptr += 2; |
| 2633 | while (*ptr && !IS_DIRECTORY_SEP (*ptr)) ptr++; |
| 2634 | ptr++; |
| 2635 | |
| 2636 | strncpy (readbuf, ptr, size); |
| 2637 | return readbuf; |
| 2638 | } |
| 2639 | |
| 2640 | static void |
| 2641 | close_unc_volume (HANDLE henum) |
| 2642 | { |
| 2643 | if (henum != INVALID_HANDLE_VALUE) |
| 2644 | WNetCloseEnum (henum); |
| 2645 | } |
| 2646 | |
| 2647 | static DWORD |
| 2648 | unc_volume_file_attributes (const char *path) |
| 2649 | { |
| 2650 | HANDLE henum; |
| 2651 | DWORD attrs; |
| 2652 | |
| 2653 | henum = open_unc_volume (path); |
| 2654 | if (henum == INVALID_HANDLE_VALUE) |
| 2655 | return -1; |
| 2656 | |
| 2657 | attrs = FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY; |
| 2658 | |
| 2659 | close_unc_volume (henum); |
| 2660 | |
| 2661 | return attrs; |
| 2662 | } |
| 2663 | |
| 2664 | /* Ensure a network connection is authenticated. */ |
| 2665 | static void |
| 2666 | logon_network_drive (const char *path) |
| 2667 | { |
| 2668 | NETRESOURCE resource; |
| 2669 | char share[MAX_PATH]; |
| 2670 | int i, n_slashes; |
| 2671 | char drive[4]; |
| 2672 | UINT drvtype; |
| 2673 | |
| 2674 | if (IS_DIRECTORY_SEP (path[0]) && IS_DIRECTORY_SEP (path[1])) |
| 2675 | drvtype = DRIVE_REMOTE; |
| 2676 | else if (path[0] == '\0' || path[1] != ':') |
| 2677 | drvtype = GetDriveType (NULL); |
| 2678 | else |
| 2679 | { |
| 2680 | drive[0] = path[0]; |
| 2681 | drive[1] = ':'; |
| 2682 | drive[2] = '\\'; |
| 2683 | drive[3] = '\0'; |
| 2684 | drvtype = GetDriveType (drive); |
| 2685 | } |
| 2686 | |
| 2687 | /* Only logon to networked drives. */ |
| 2688 | if (drvtype != DRIVE_REMOTE) |
| 2689 | return; |
| 2690 | |
| 2691 | n_slashes = 2; |
| 2692 | strncpy (share, path, MAX_PATH); |
| 2693 | /* Truncate to just server and share name. */ |
| 2694 | for (i = 2; i < MAX_PATH; i++) |
| 2695 | { |
| 2696 | if (IS_DIRECTORY_SEP (share[i]) && ++n_slashes > 3) |
| 2697 | { |
| 2698 | share[i] = '\0'; |
| 2699 | break; |
| 2700 | } |
| 2701 | } |
| 2702 | |
| 2703 | resource.dwType = RESOURCETYPE_DISK; |
| 2704 | resource.lpLocalName = NULL; |
| 2705 | resource.lpRemoteName = share; |
| 2706 | resource.lpProvider = NULL; |
| 2707 | |
| 2708 | WNetAddConnection2 (&resource, NULL, NULL, CONNECT_INTERACTIVE); |
| 2709 | } |
| 2710 | |
| 2711 | /* Shadow some MSVC runtime functions to map requests for long filenames |
| 2712 | to reasonable short names if necessary. This was originally added to |
| 2713 | permit running Emacs on NT 3.1 on a FAT partition, which doesn't support |
| 2714 | long file names. */ |
| 2715 | |
| 2716 | int |
| 2717 | sys_access (const char * path, int mode) |
| 2718 | { |
| 2719 | DWORD attributes; |
| 2720 | |
| 2721 | /* MSVCRT implementation of 'access' doesn't recognize D_OK, and its |
| 2722 | newer versions blow up when passed D_OK. */ |
| 2723 | path = map_w32_filename (path, NULL); |
| 2724 | /* If the last element of PATH is a symlink, we need to resolve it |
| 2725 | to get the attributes of its target file. Note: any symlinks in |
| 2726 | PATH elements other than the last one are transparently resolved |
| 2727 | by GetFileAttributes below. */ |
| 2728 | if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0) |
| 2729 | path = chase_symlinks (path); |
| 2730 | |
| 2731 | if ((attributes = GetFileAttributes (path)) == -1) |
| 2732 | { |
| 2733 | DWORD w32err = GetLastError (); |
| 2734 | |
| 2735 | switch (w32err) |
| 2736 | { |
| 2737 | case ERROR_INVALID_NAME: |
| 2738 | case ERROR_BAD_PATHNAME: |
| 2739 | if (is_unc_volume (path)) |
| 2740 | { |
| 2741 | attributes = unc_volume_file_attributes (path); |
| 2742 | if (attributes == -1) |
| 2743 | { |
| 2744 | errno = EACCES; |
| 2745 | return -1; |
| 2746 | } |
| 2747 | break; |
| 2748 | } |
| 2749 | /* FALLTHROUGH */ |
| 2750 | case ERROR_FILE_NOT_FOUND: |
| 2751 | case ERROR_BAD_NETPATH: |
| 2752 | errno = ENOENT; |
| 2753 | break; |
| 2754 | default: |
| 2755 | errno = EACCES; |
| 2756 | break; |
| 2757 | } |
| 2758 | return -1; |
| 2759 | } |
| 2760 | if ((mode & X_OK) != 0 && !is_exec (path)) |
| 2761 | { |
| 2762 | errno = EACCES; |
| 2763 | return -1; |
| 2764 | } |
| 2765 | if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0) |
| 2766 | { |
| 2767 | errno = EACCES; |
| 2768 | return -1; |
| 2769 | } |
| 2770 | if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0) |
| 2771 | { |
| 2772 | errno = EACCES; |
| 2773 | return -1; |
| 2774 | } |
| 2775 | return 0; |
| 2776 | } |
| 2777 | |
| 2778 | int |
| 2779 | sys_chdir (const char * path) |
| 2780 | { |
| 2781 | return _chdir (map_w32_filename (path, NULL)); |
| 2782 | } |
| 2783 | |
| 2784 | int |
| 2785 | sys_chmod (const char * path, int mode) |
| 2786 | { |
| 2787 | path = chase_symlinks (map_w32_filename (path, NULL)); |
| 2788 | return _chmod (path, mode); |
| 2789 | } |
| 2790 | |
| 2791 | int |
| 2792 | sys_chown (const char *path, uid_t owner, gid_t group) |
| 2793 | { |
| 2794 | if (sys_chmod (path, S_IREAD) == -1) /* check if file exists */ |
| 2795 | return -1; |
| 2796 | return 0; |
| 2797 | } |
| 2798 | |
| 2799 | int |
| 2800 | sys_creat (const char * path, int mode) |
| 2801 | { |
| 2802 | return _creat (map_w32_filename (path, NULL), mode); |
| 2803 | } |
| 2804 | |
| 2805 | FILE * |
| 2806 | sys_fopen (const char * path, const char * mode) |
| 2807 | { |
| 2808 | int fd; |
| 2809 | int oflag; |
| 2810 | const char * mode_save = mode; |
| 2811 | |
| 2812 | /* Force all file handles to be non-inheritable. This is necessary to |
| 2813 | ensure child processes don't unwittingly inherit handles that might |
| 2814 | prevent future file access. */ |
| 2815 | |
| 2816 | if (mode[0] == 'r') |
| 2817 | oflag = O_RDONLY; |
| 2818 | else if (mode[0] == 'w' || mode[0] == 'a') |
| 2819 | oflag = O_WRONLY | O_CREAT | O_TRUNC; |
| 2820 | else |
| 2821 | return NULL; |
| 2822 | |
| 2823 | /* Only do simplistic option parsing. */ |
| 2824 | while (*++mode) |
| 2825 | if (mode[0] == '+') |
| 2826 | { |
| 2827 | oflag &= ~(O_RDONLY | O_WRONLY); |
| 2828 | oflag |= O_RDWR; |
| 2829 | } |
| 2830 | else if (mode[0] == 'b') |
| 2831 | { |
| 2832 | oflag &= ~O_TEXT; |
| 2833 | oflag |= O_BINARY; |
| 2834 | } |
| 2835 | else if (mode[0] == 't') |
| 2836 | { |
| 2837 | oflag &= ~O_BINARY; |
| 2838 | oflag |= O_TEXT; |
| 2839 | } |
| 2840 | else break; |
| 2841 | |
| 2842 | fd = _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, 0644); |
| 2843 | if (fd < 0) |
| 2844 | return NULL; |
| 2845 | |
| 2846 | return _fdopen (fd, mode_save); |
| 2847 | } |
| 2848 | |
| 2849 | /* This only works on NTFS volumes, but is useful to have. */ |
| 2850 | int |
| 2851 | sys_link (const char * old, const char * new) |
| 2852 | { |
| 2853 | HANDLE fileh; |
| 2854 | int result = -1; |
| 2855 | char oldname[MAX_PATH], newname[MAX_PATH]; |
| 2856 | |
| 2857 | if (old == NULL || new == NULL) |
| 2858 | { |
| 2859 | errno = ENOENT; |
| 2860 | return -1; |
| 2861 | } |
| 2862 | |
| 2863 | strcpy (oldname, map_w32_filename (old, NULL)); |
| 2864 | strcpy (newname, map_w32_filename (new, NULL)); |
| 2865 | |
| 2866 | fileh = CreateFile (oldname, 0, 0, NULL, OPEN_EXISTING, |
| 2867 | FILE_FLAG_BACKUP_SEMANTICS, NULL); |
| 2868 | if (fileh != INVALID_HANDLE_VALUE) |
| 2869 | { |
| 2870 | int wlen; |
| 2871 | |
| 2872 | /* Confusingly, the "alternate" stream name field does not apply |
| 2873 | when restoring a hard link, and instead contains the actual |
| 2874 | stream data for the link (ie. the name of the link to create). |
| 2875 | The WIN32_STREAM_ID structure before the cStreamName field is |
| 2876 | the stream header, which is then immediately followed by the |
| 2877 | stream data. */ |
| 2878 | |
| 2879 | struct { |
| 2880 | WIN32_STREAM_ID wid; |
| 2881 | WCHAR wbuffer[MAX_PATH]; /* extra space for link name */ |
| 2882 | } data; |
| 2883 | |
| 2884 | wlen = MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, newname, -1, |
| 2885 | data.wid.cStreamName, MAX_PATH); |
| 2886 | if (wlen > 0) |
| 2887 | { |
| 2888 | LPVOID context = NULL; |
| 2889 | DWORD wbytes = 0; |
| 2890 | |
| 2891 | data.wid.dwStreamId = BACKUP_LINK; |
| 2892 | data.wid.dwStreamAttributes = 0; |
| 2893 | data.wid.Size.LowPart = wlen * sizeof (WCHAR); |
| 2894 | data.wid.Size.HighPart = 0; |
| 2895 | data.wid.dwStreamNameSize = 0; |
| 2896 | |
| 2897 | if (BackupWrite (fileh, (LPBYTE)&data, |
| 2898 | offsetof (WIN32_STREAM_ID, cStreamName) |
| 2899 | + data.wid.Size.LowPart, |
| 2900 | &wbytes, FALSE, FALSE, &context) |
| 2901 | && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context)) |
| 2902 | { |
| 2903 | /* succeeded */ |
| 2904 | result = 0; |
| 2905 | } |
| 2906 | else |
| 2907 | { |
| 2908 | /* Should try mapping GetLastError to errno; for now just |
| 2909 | indicate a general error (eg. links not supported). */ |
| 2910 | errno = EINVAL; // perhaps EMLINK? |
| 2911 | } |
| 2912 | } |
| 2913 | |
| 2914 | CloseHandle (fileh); |
| 2915 | } |
| 2916 | else |
| 2917 | errno = ENOENT; |
| 2918 | |
| 2919 | return result; |
| 2920 | } |
| 2921 | |
| 2922 | int |
| 2923 | sys_mkdir (const char * path) |
| 2924 | { |
| 2925 | return _mkdir (map_w32_filename (path, NULL)); |
| 2926 | } |
| 2927 | |
| 2928 | /* Because of long name mapping issues, we need to implement this |
| 2929 | ourselves. Also, MSVC's _mktemp returns NULL when it can't generate |
| 2930 | a unique name, instead of setting the input template to an empty |
| 2931 | string. |
| 2932 | |
| 2933 | Standard algorithm seems to be use pid or tid with a letter on the |
| 2934 | front (in place of the 6 X's) and cycle through the letters to find a |
| 2935 | unique name. We extend that to allow any reasonable character as the |
| 2936 | first of the 6 X's. */ |
| 2937 | char * |
| 2938 | sys_mktemp (char * template) |
| 2939 | { |
| 2940 | char * p; |
| 2941 | int i; |
| 2942 | unsigned uid = GetCurrentThreadId (); |
| 2943 | static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#"; |
| 2944 | |
| 2945 | if (template == NULL) |
| 2946 | return NULL; |
| 2947 | p = template + strlen (template); |
| 2948 | i = 5; |
| 2949 | /* replace up to the last 5 X's with uid in decimal */ |
| 2950 | while (--p >= template && p[0] == 'X' && --i >= 0) |
| 2951 | { |
| 2952 | p[0] = '0' + uid % 10; |
| 2953 | uid /= 10; |
| 2954 | } |
| 2955 | |
| 2956 | if (i < 0 && p[0] == 'X') |
| 2957 | { |
| 2958 | i = 0; |
| 2959 | do |
| 2960 | { |
| 2961 | int save_errno = errno; |
| 2962 | p[0] = first_char[i]; |
| 2963 | if (sys_access (template, 0) < 0) |
| 2964 | { |
| 2965 | errno = save_errno; |
| 2966 | return template; |
| 2967 | } |
| 2968 | } |
| 2969 | while (++i < sizeof (first_char)); |
| 2970 | } |
| 2971 | |
| 2972 | /* Template is badly formed or else we can't generate a unique name, |
| 2973 | so return empty string */ |
| 2974 | template[0] = 0; |
| 2975 | return template; |
| 2976 | } |
| 2977 | |
| 2978 | int |
| 2979 | sys_open (const char * path, int oflag, int mode) |
| 2980 | { |
| 2981 | const char* mpath = map_w32_filename (path, NULL); |
| 2982 | /* Try to open file without _O_CREAT, to be able to write to hidden |
| 2983 | and system files. Force all file handles to be |
| 2984 | non-inheritable. */ |
| 2985 | int res = _open (mpath, (oflag & ~_O_CREAT) | _O_NOINHERIT, mode); |
| 2986 | if (res >= 0) |
| 2987 | return res; |
| 2988 | return _open (mpath, oflag | _O_NOINHERIT, mode); |
| 2989 | } |
| 2990 | |
| 2991 | int |
| 2992 | sys_rename (const char * oldname, const char * newname) |
| 2993 | { |
| 2994 | BOOL result; |
| 2995 | char temp[MAX_PATH]; |
| 2996 | int newname_dev; |
| 2997 | int oldname_dev; |
| 2998 | |
| 2999 | /* MoveFile on Windows 95 doesn't correctly change the short file name |
| 3000 | alias in a number of circumstances (it is not easy to predict when |
| 3001 | just by looking at oldname and newname, unfortunately). In these |
| 3002 | cases, renaming through a temporary name avoids the problem. |
| 3003 | |
| 3004 | A second problem on Windows 95 is that renaming through a temp name when |
| 3005 | newname is uppercase fails (the final long name ends up in |
| 3006 | lowercase, although the short alias might be uppercase) UNLESS the |
| 3007 | long temp name is not 8.3. |
| 3008 | |
| 3009 | So, on Windows 95 we always rename through a temp name, and we make sure |
| 3010 | the temp name has a long extension to ensure correct renaming. */ |
| 3011 | |
| 3012 | strcpy (temp, map_w32_filename (oldname, NULL)); |
| 3013 | |
| 3014 | /* volume_info is set indirectly by map_w32_filename. */ |
| 3015 | oldname_dev = volume_info.serialnum; |
| 3016 | |
| 3017 | if (os_subtype == OS_9X) |
| 3018 | { |
| 3019 | char * o; |
| 3020 | char * p; |
| 3021 | int i = 0; |
| 3022 | |
| 3023 | oldname = map_w32_filename (oldname, NULL); |
| 3024 | if ((o = strrchr (oldname, '\\'))) |
| 3025 | o++; |
| 3026 | else |
| 3027 | o = (char *) oldname; |
| 3028 | |
| 3029 | if ((p = strrchr (temp, '\\'))) |
| 3030 | p++; |
| 3031 | else |
| 3032 | p = temp; |
| 3033 | |
| 3034 | do |
| 3035 | { |
| 3036 | /* Force temp name to require a manufactured 8.3 alias - this |
| 3037 | seems to make the second rename work properly. */ |
| 3038 | sprintf (p, "_.%s.%u", o, i); |
| 3039 | i++; |
| 3040 | result = rename (oldname, temp); |
| 3041 | } |
| 3042 | /* This loop must surely terminate! */ |
| 3043 | while (result < 0 && errno == EEXIST); |
| 3044 | if (result < 0) |
| 3045 | return -1; |
| 3046 | } |
| 3047 | |
| 3048 | /* Emulate Unix behavior - newname is deleted if it already exists |
| 3049 | (at least if it is a file; don't do this for directories). |
| 3050 | |
| 3051 | Since we mustn't do this if we are just changing the case of the |
| 3052 | file name (we would end up deleting the file we are trying to |
| 3053 | rename!), we let rename detect if the destination file already |
| 3054 | exists - that way we avoid the possible pitfalls of trying to |
| 3055 | determine ourselves whether two names really refer to the same |
| 3056 | file, which is not always possible in the general case. (Consider |
| 3057 | all the permutations of shared or subst'd drives, etc.) */ |
| 3058 | |
| 3059 | newname = map_w32_filename (newname, NULL); |
| 3060 | |
| 3061 | /* volume_info is set indirectly by map_w32_filename. */ |
| 3062 | newname_dev = volume_info.serialnum; |
| 3063 | |
| 3064 | result = rename (temp, newname); |
| 3065 | |
| 3066 | if (result < 0) |
| 3067 | { |
| 3068 | DWORD w32err = GetLastError (); |
| 3069 | |
| 3070 | if (errno == EACCES |
| 3071 | && newname_dev != oldname_dev) |
| 3072 | { |
| 3073 | /* The implementation of `rename' on Windows does not return |
| 3074 | errno = EXDEV when you are moving a directory to a |
| 3075 | different storage device (ex. logical disk). It returns |
| 3076 | EACCES instead. So here we handle such situations and |
| 3077 | return EXDEV. */ |
| 3078 | DWORD attributes; |
| 3079 | |
| 3080 | if ((attributes = GetFileAttributes (temp)) != -1 |
| 3081 | && (attributes & FILE_ATTRIBUTE_DIRECTORY)) |
| 3082 | errno = EXDEV; |
| 3083 | } |
| 3084 | else if (errno == EEXIST) |
| 3085 | { |
| 3086 | if (_chmod (newname, 0666) != 0) |
| 3087 | return result; |
| 3088 | if (_unlink (newname) != 0) |
| 3089 | return result; |
| 3090 | result = rename (temp, newname); |
| 3091 | } |
| 3092 | else if (w32err == ERROR_PRIVILEGE_NOT_HELD |
| 3093 | && is_symlink (temp)) |
| 3094 | { |
| 3095 | /* This is Windows prohibiting the user from creating a |
| 3096 | symlink in another place, since that requires |
| 3097 | privileges. */ |
| 3098 | errno = EPERM; |
| 3099 | } |
| 3100 | } |
| 3101 | |
| 3102 | return result; |
| 3103 | } |
| 3104 | |
| 3105 | int |
| 3106 | sys_rmdir (const char * path) |
| 3107 | { |
| 3108 | return _rmdir (map_w32_filename (path, NULL)); |
| 3109 | } |
| 3110 | |
| 3111 | int |
| 3112 | sys_unlink (const char * path) |
| 3113 | { |
| 3114 | path = map_w32_filename (path, NULL); |
| 3115 | |
| 3116 | /* On Unix, unlink works without write permission. */ |
| 3117 | _chmod (path, 0666); |
| 3118 | return _unlink (path); |
| 3119 | } |
| 3120 | |
| 3121 | static FILETIME utc_base_ft; |
| 3122 | static ULONGLONG utc_base; /* In 100ns units */ |
| 3123 | static int init = 0; |
| 3124 | |
| 3125 | #define FILETIME_TO_U64(result, ft) \ |
| 3126 | do { \ |
| 3127 | ULARGE_INTEGER uiTemp; \ |
| 3128 | uiTemp.LowPart = (ft).dwLowDateTime; \ |
| 3129 | uiTemp.HighPart = (ft).dwHighDateTime; \ |
| 3130 | result = uiTemp.QuadPart; \ |
| 3131 | } while (0) |
| 3132 | |
| 3133 | static void |
| 3134 | initialize_utc_base (void) |
| 3135 | { |
| 3136 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ |
| 3137 | SYSTEMTIME st; |
| 3138 | |
| 3139 | st.wYear = 1970; |
| 3140 | st.wMonth = 1; |
| 3141 | st.wDay = 1; |
| 3142 | st.wHour = 0; |
| 3143 | st.wMinute = 0; |
| 3144 | st.wSecond = 0; |
| 3145 | st.wMilliseconds = 0; |
| 3146 | |
| 3147 | SystemTimeToFileTime (&st, &utc_base_ft); |
| 3148 | FILETIME_TO_U64 (utc_base, utc_base_ft); |
| 3149 | } |
| 3150 | |
| 3151 | static time_t |
| 3152 | convert_time (FILETIME ft) |
| 3153 | { |
| 3154 | ULONGLONG tmp; |
| 3155 | |
| 3156 | if (!init) |
| 3157 | { |
| 3158 | initialize_utc_base (); |
| 3159 | init = 1; |
| 3160 | } |
| 3161 | |
| 3162 | if (CompareFileTime (&ft, &utc_base_ft) < 0) |
| 3163 | return 0; |
| 3164 | |
| 3165 | FILETIME_TO_U64 (tmp, ft); |
| 3166 | return (time_t) ((tmp - utc_base) / 10000000L); |
| 3167 | } |
| 3168 | |
| 3169 | static void |
| 3170 | convert_from_time_t (time_t time, FILETIME * pft) |
| 3171 | { |
| 3172 | ULARGE_INTEGER tmp; |
| 3173 | |
| 3174 | if (!init) |
| 3175 | { |
| 3176 | initialize_utc_base (); |
| 3177 | init = 1; |
| 3178 | } |
| 3179 | |
| 3180 | /* time in 100ns units since 1-Jan-1601 */ |
| 3181 | tmp.QuadPart = (ULONGLONG) time * 10000000L + utc_base; |
| 3182 | pft->dwHighDateTime = tmp.HighPart; |
| 3183 | pft->dwLowDateTime = tmp.LowPart; |
| 3184 | } |
| 3185 | |
| 3186 | #if 0 |
| 3187 | /* No reason to keep this; faking inode values either by hashing or even |
| 3188 | using the file index from GetInformationByHandle, is not perfect and |
| 3189 | so by default Emacs doesn't use the inode values on Windows. |
| 3190 | Instead, we now determine file-truename correctly (except for |
| 3191 | possible drive aliasing etc). */ |
| 3192 | |
| 3193 | /* Modified version of "PJW" algorithm (see the "Dragon" compiler book). */ |
| 3194 | static unsigned |
| 3195 | hashval (const unsigned char * str) |
| 3196 | { |
| 3197 | unsigned h = 0; |
| 3198 | while (*str) |
| 3199 | { |
| 3200 | h = (h << 4) + *str++; |
| 3201 | h ^= (h >> 28); |
| 3202 | } |
| 3203 | return h; |
| 3204 | } |
| 3205 | |
| 3206 | /* Return the hash value of the canonical pathname, excluding the |
| 3207 | drive/UNC header, to get a hopefully unique inode number. */ |
| 3208 | static DWORD |
| 3209 | generate_inode_val (const char * name) |
| 3210 | { |
| 3211 | char fullname[ MAX_PATH ]; |
| 3212 | char * p; |
| 3213 | unsigned hash; |
| 3214 | |
| 3215 | /* Get the truly canonical filename, if it exists. (Note: this |
| 3216 | doesn't resolve aliasing due to subst commands, or recognize hard |
| 3217 | links. */ |
| 3218 | if (!w32_get_long_filename ((char *)name, fullname, MAX_PATH)) |
| 3219 | emacs_abort (); |
| 3220 | |
| 3221 | parse_root (fullname, &p); |
| 3222 | /* Normal W32 filesystems are still case insensitive. */ |
| 3223 | _strlwr (p); |
| 3224 | return hashval (p); |
| 3225 | } |
| 3226 | |
| 3227 | #endif |
| 3228 | |
| 3229 | static PSECURITY_DESCRIPTOR |
| 3230 | get_file_security_desc_by_handle (HANDLE h) |
| 3231 | { |
| 3232 | PSECURITY_DESCRIPTOR psd = NULL; |
| 3233 | DWORD err; |
| 3234 | SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION |
| 3235 | | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ; |
| 3236 | |
| 3237 | err = get_security_info (h, SE_FILE_OBJECT, si, |
| 3238 | NULL, NULL, NULL, NULL, &psd); |
| 3239 | if (err != ERROR_SUCCESS) |
| 3240 | return NULL; |
| 3241 | |
| 3242 | return psd; |
| 3243 | } |
| 3244 | |
| 3245 | static PSECURITY_DESCRIPTOR |
| 3246 | get_file_security_desc_by_name (const char *fname) |
| 3247 | { |
| 3248 | PSECURITY_DESCRIPTOR psd = NULL; |
| 3249 | DWORD sd_len, err; |
| 3250 | SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION |
| 3251 | | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ; |
| 3252 | |
| 3253 | if (!get_file_security (fname, si, psd, 0, &sd_len)) |
| 3254 | { |
| 3255 | err = GetLastError (); |
| 3256 | if (err != ERROR_INSUFFICIENT_BUFFER) |
| 3257 | return NULL; |
| 3258 | } |
| 3259 | |
| 3260 | psd = xmalloc (sd_len); |
| 3261 | if (!get_file_security (fname, si, psd, sd_len, &sd_len)) |
| 3262 | { |
| 3263 | xfree (psd); |
| 3264 | return NULL; |
| 3265 | } |
| 3266 | |
| 3267 | return psd; |
| 3268 | } |
| 3269 | |
| 3270 | static DWORD |
| 3271 | get_rid (PSID sid) |
| 3272 | { |
| 3273 | unsigned n_subauthorities; |
| 3274 | |
| 3275 | /* Use the last sub-authority value of the RID, the relative |
| 3276 | portion of the SID, as user/group ID. */ |
| 3277 | n_subauthorities = *get_sid_sub_authority_count (sid); |
| 3278 | if (n_subauthorities < 1) |
| 3279 | return 0; /* the "World" RID */ |
| 3280 | return *get_sid_sub_authority (sid, n_subauthorities - 1); |
| 3281 | } |
| 3282 | |
| 3283 | /* Caching SID and account values for faster lokup. */ |
| 3284 | |
| 3285 | #ifdef __GNUC__ |
| 3286 | # define FLEXIBLE_ARRAY_MEMBER |
| 3287 | #else |
| 3288 | # define FLEXIBLE_ARRAY_MEMBER 1 |
| 3289 | #endif |
| 3290 | |
| 3291 | struct w32_id { |
| 3292 | unsigned rid; |
| 3293 | struct w32_id *next; |
| 3294 | char name[GNLEN+1]; |
| 3295 | unsigned char sid[FLEXIBLE_ARRAY_MEMBER]; |
| 3296 | }; |
| 3297 | |
| 3298 | static struct w32_id *w32_idlist; |
| 3299 | |
| 3300 | static int |
| 3301 | w32_cached_id (PSID sid, unsigned *id, char *name) |
| 3302 | { |
| 3303 | struct w32_id *tail, *found; |
| 3304 | |
| 3305 | for (found = NULL, tail = w32_idlist; tail; tail = tail->next) |
| 3306 | { |
| 3307 | if (equal_sid ((PSID)tail->sid, sid)) |
| 3308 | { |
| 3309 | found = tail; |
| 3310 | break; |
| 3311 | } |
| 3312 | } |
| 3313 | if (found) |
| 3314 | { |
| 3315 | *id = found->rid; |
| 3316 | strcpy (name, found->name); |
| 3317 | return 1; |
| 3318 | } |
| 3319 | else |
| 3320 | return 0; |
| 3321 | } |
| 3322 | |
| 3323 | static void |
| 3324 | w32_add_to_cache (PSID sid, unsigned id, char *name) |
| 3325 | { |
| 3326 | DWORD sid_len; |
| 3327 | struct w32_id *new_entry; |
| 3328 | |
| 3329 | /* We don't want to leave behind stale cache from when Emacs was |
| 3330 | dumped. */ |
| 3331 | if (initialized) |
| 3332 | { |
| 3333 | sid_len = get_length_sid (sid); |
| 3334 | new_entry = xmalloc (offsetof (struct w32_id, sid) + sid_len); |
| 3335 | if (new_entry) |
| 3336 | { |
| 3337 | new_entry->rid = id; |
| 3338 | strcpy (new_entry->name, name); |
| 3339 | copy_sid (sid_len, (PSID)new_entry->sid, sid); |
| 3340 | new_entry->next = w32_idlist; |
| 3341 | w32_idlist = new_entry; |
| 3342 | } |
| 3343 | } |
| 3344 | } |
| 3345 | |
| 3346 | #define UID 1 |
| 3347 | #define GID 2 |
| 3348 | |
| 3349 | static int |
| 3350 | get_name_and_id (PSECURITY_DESCRIPTOR psd, const char *fname, |
| 3351 | unsigned *id, char *nm, int what) |
| 3352 | { |
| 3353 | PSID sid = NULL; |
| 3354 | char machine[MAX_COMPUTERNAME_LENGTH+1]; |
| 3355 | BOOL dflt; |
| 3356 | SID_NAME_USE ignore; |
| 3357 | char name[UNLEN+1]; |
| 3358 | DWORD name_len = sizeof (name); |
| 3359 | char domain[1024]; |
| 3360 | DWORD domain_len = sizeof (domain); |
| 3361 | char *mp = NULL; |
| 3362 | int use_dflt = 0; |
| 3363 | int result; |
| 3364 | |
| 3365 | if (what == UID) |
| 3366 | result = get_security_descriptor_owner (psd, &sid, &dflt); |
| 3367 | else if (what == GID) |
| 3368 | result = get_security_descriptor_group (psd, &sid, &dflt); |
| 3369 | else |
| 3370 | result = 0; |
| 3371 | |
| 3372 | if (!result || !is_valid_sid (sid)) |
| 3373 | use_dflt = 1; |
| 3374 | else if (!w32_cached_id (sid, id, nm)) |
| 3375 | { |
| 3376 | /* If FNAME is a UNC, we need to lookup account on the |
| 3377 | specified machine. */ |
| 3378 | if (IS_DIRECTORY_SEP (fname[0]) && IS_DIRECTORY_SEP (fname[1]) |
| 3379 | && fname[2] != '\0') |
| 3380 | { |
| 3381 | const char *s; |
| 3382 | char *p; |
| 3383 | |
| 3384 | for (s = fname + 2, p = machine; |
| 3385 | *s && !IS_DIRECTORY_SEP (*s); s++, p++) |
| 3386 | *p = *s; |
| 3387 | *p = '\0'; |
| 3388 | mp = machine; |
| 3389 | } |
| 3390 | |
| 3391 | if (!lookup_account_sid (mp, sid, name, &name_len, |
| 3392 | domain, &domain_len, &ignore) |
| 3393 | || name_len > UNLEN+1) |
| 3394 | use_dflt = 1; |
| 3395 | else |
| 3396 | { |
| 3397 | *id = get_rid (sid); |
| 3398 | strcpy (nm, name); |
| 3399 | w32_add_to_cache (sid, *id, name); |
| 3400 | } |
| 3401 | } |
| 3402 | return use_dflt; |
| 3403 | } |
| 3404 | |
| 3405 | static void |
| 3406 | get_file_owner_and_group (PSECURITY_DESCRIPTOR psd, |
| 3407 | const char *fname, |
| 3408 | struct stat *st) |
| 3409 | { |
| 3410 | int dflt_usr = 0, dflt_grp = 0; |
| 3411 | |
| 3412 | if (!psd) |
| 3413 | { |
| 3414 | dflt_usr = 1; |
| 3415 | dflt_grp = 1; |
| 3416 | } |
| 3417 | else |
| 3418 | { |
| 3419 | if (get_name_and_id (psd, fname, &st->st_uid, st->st_uname, UID)) |
| 3420 | dflt_usr = 1; |
| 3421 | if (get_name_and_id (psd, fname, &st->st_gid, st->st_gname, GID)) |
| 3422 | dflt_grp = 1; |
| 3423 | } |
| 3424 | /* Consider files to belong to current user/group, if we cannot get |
| 3425 | more accurate information. */ |
| 3426 | if (dflt_usr) |
| 3427 | { |
| 3428 | st->st_uid = dflt_passwd.pw_uid; |
| 3429 | strcpy (st->st_uname, dflt_passwd.pw_name); |
| 3430 | } |
| 3431 | if (dflt_grp) |
| 3432 | { |
| 3433 | st->st_gid = dflt_passwd.pw_gid; |
| 3434 | strcpy (st->st_gname, dflt_group.gr_name); |
| 3435 | } |
| 3436 | } |
| 3437 | |
| 3438 | /* Return non-zero if NAME is a potentially slow filesystem. */ |
| 3439 | int |
| 3440 | is_slow_fs (const char *name) |
| 3441 | { |
| 3442 | char drive_root[4]; |
| 3443 | UINT devtype; |
| 3444 | |
| 3445 | if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) |
| 3446 | devtype = DRIVE_REMOTE; /* assume UNC name is remote */ |
| 3447 | else if (!(strlen (name) >= 2 && IS_DEVICE_SEP (name[1]))) |
| 3448 | devtype = GetDriveType (NULL); /* use root of current drive */ |
| 3449 | else |
| 3450 | { |
| 3451 | /* GetDriveType needs the root directory of the drive. */ |
| 3452 | strncpy (drive_root, name, 2); |
| 3453 | drive_root[2] = '\\'; |
| 3454 | drive_root[3] = '\0'; |
| 3455 | devtype = GetDriveType (drive_root); |
| 3456 | } |
| 3457 | return !(devtype == DRIVE_FIXED || devtype == DRIVE_RAMDISK); |
| 3458 | } |
| 3459 | |
| 3460 | /* MSVC stat function can't cope with UNC names and has other bugs, so |
| 3461 | replace it with our own. This also allows us to calculate consistent |
| 3462 | inode values and owner/group without hacks in the main Emacs code. */ |
| 3463 | |
| 3464 | static int |
| 3465 | stat_worker (const char * path, struct stat * buf, int follow_symlinks) |
| 3466 | { |
| 3467 | char *name, *save_name, *r; |
| 3468 | WIN32_FIND_DATA wfd; |
| 3469 | HANDLE fh; |
| 3470 | unsigned __int64 fake_inode = 0; |
| 3471 | int permission; |
| 3472 | int len; |
| 3473 | int rootdir = FALSE; |
| 3474 | PSECURITY_DESCRIPTOR psd = NULL; |
| 3475 | int is_a_symlink = 0; |
| 3476 | DWORD file_flags = FILE_FLAG_BACKUP_SEMANTICS; |
| 3477 | DWORD access_rights = 0; |
| 3478 | DWORD fattrs = 0, serialnum = 0, fs_high = 0, fs_low = 0, nlinks = 1; |
| 3479 | FILETIME ctime, atime, wtime; |
| 3480 | |
| 3481 | if (path == NULL || buf == NULL) |
| 3482 | { |
| 3483 | errno = EFAULT; |
| 3484 | return -1; |
| 3485 | } |
| 3486 | |
| 3487 | save_name = name = (char *) map_w32_filename (path, &path); |
| 3488 | /* Must be valid filename, no wild cards or other invalid |
| 3489 | characters. We use _mbspbrk to support multibyte strings that |
| 3490 | might look to strpbrk as if they included literal *, ?, and other |
| 3491 | characters mentioned below that are disallowed by Windows |
| 3492 | filesystems. */ |
| 3493 | if (_mbspbrk (name, "*?|<>\"")) |
| 3494 | { |
| 3495 | errno = ENOENT; |
| 3496 | return -1; |
| 3497 | } |
| 3498 | |
| 3499 | /* Remove trailing directory separator, unless name is the root |
| 3500 | directory of a drive or UNC volume in which case ensure there |
| 3501 | is a trailing separator. */ |
| 3502 | len = strlen (name); |
| 3503 | name = strcpy (alloca (len + 2), name); |
| 3504 | |
| 3505 | /* Avoid a somewhat costly call to is_symlink if the filesystem |
| 3506 | doesn't support symlinks. */ |
| 3507 | if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0) |
| 3508 | is_a_symlink = is_symlink (name); |
| 3509 | |
| 3510 | /* Plan A: Open the file and get all the necessary information via |
| 3511 | the resulting handle. This solves several issues in one blow: |
| 3512 | |
| 3513 | . retrieves attributes for the target of a symlink, if needed |
| 3514 | . gets attributes of root directories and symlinks pointing to |
| 3515 | root directories, thus avoiding the need for special-casing |
| 3516 | these and detecting them by examining the file-name format |
| 3517 | . retrieves more accurate attributes (e.g., non-zero size for |
| 3518 | some directories, esp. directories that are junction points) |
| 3519 | . correctly resolves "c:/..", "/.." and similar file names |
| 3520 | . avoids run-time penalties for 99% of use cases |
| 3521 | |
| 3522 | Plan A is always tried first, unless the user asked not to (but |
| 3523 | if the file is a symlink and we need to follow links, we try Plan |
| 3524 | A even if the user asked not to). |
| 3525 | |
| 3526 | If Plan A fails, we go to Plan B (below), where various |
| 3527 | potentially expensive techniques must be used to handle "special" |
| 3528 | files such as UNC volumes etc. */ |
| 3529 | if (!(NILP (Vw32_get_true_file_attributes) |
| 3530 | || (EQ (Vw32_get_true_file_attributes, Qlocal) && is_slow_fs (name))) |
| 3531 | /* Following symlinks requires getting the info by handle. */ |
| 3532 | || (is_a_symlink && follow_symlinks)) |
| 3533 | { |
| 3534 | BY_HANDLE_FILE_INFORMATION info; |
| 3535 | |
| 3536 | if (is_a_symlink && !follow_symlinks) |
| 3537 | file_flags |= FILE_FLAG_OPEN_REPARSE_POINT; |
| 3538 | /* READ_CONTROL access rights are required to get security info |
| 3539 | by handle. But if the OS doesn't support security in the |
| 3540 | first place, we don't need to try. */ |
| 3541 | if (is_windows_9x () != TRUE) |
| 3542 | access_rights |= READ_CONTROL; |
| 3543 | |
| 3544 | fh = CreateFile (name, access_rights, 0, NULL, OPEN_EXISTING, |
| 3545 | file_flags, NULL); |
| 3546 | /* If CreateFile fails with READ_CONTROL, try again with zero as |
| 3547 | access rights. */ |
| 3548 | if (fh == INVALID_HANDLE_VALUE && access_rights) |
| 3549 | fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING, |
| 3550 | file_flags, NULL); |
| 3551 | if (fh == INVALID_HANDLE_VALUE) |
| 3552 | goto no_true_file_attributes; |
| 3553 | |
| 3554 | /* This is more accurate in terms of getting the correct number |
| 3555 | of links, but is quite slow (it is noticeable when Emacs is |
| 3556 | making a list of file name completions). */ |
| 3557 | if (GetFileInformationByHandle (fh, &info)) |
| 3558 | { |
| 3559 | nlinks = info.nNumberOfLinks; |
| 3560 | /* Might as well use file index to fake inode values, but this |
| 3561 | is not guaranteed to be unique unless we keep a handle open |
| 3562 | all the time (even then there are situations where it is |
| 3563 | not unique). Reputedly, there are at most 48 bits of info |
| 3564 | (on NTFS, presumably less on FAT). */ |
| 3565 | fake_inode = info.nFileIndexHigh; |
| 3566 | fake_inode <<= 32; |
| 3567 | fake_inode += info.nFileIndexLow; |
| 3568 | serialnum = info.dwVolumeSerialNumber; |
| 3569 | fs_high = info.nFileSizeHigh; |
| 3570 | fs_low = info.nFileSizeLow; |
| 3571 | ctime = info.ftCreationTime; |
| 3572 | atime = info.ftLastAccessTime; |
| 3573 | wtime = info.ftLastWriteTime; |
| 3574 | fattrs = info.dwFileAttributes; |
| 3575 | } |
| 3576 | else |
| 3577 | { |
| 3578 | /* We don't go to Plan B here, because it's not clear that |
| 3579 | it's a good idea. The only known use case where |
| 3580 | CreateFile succeeds, but GetFileInformationByHandle fails |
| 3581 | (with ERROR_INVALID_FUNCTION) is for character devices |
| 3582 | such as NUL, PRN, etc. For these, switching to Plan B is |
| 3583 | a net loss, because we lose the character device |
| 3584 | attribute returned by GetFileType below (FindFirstFile |
| 3585 | doesn't set that bit in the attributes), and the other |
| 3586 | fields don't make sense for character devices anyway. |
| 3587 | Emacs doesn't really care for non-file entities in the |
| 3588 | context of l?stat, so neither do we. */ |
| 3589 | |
| 3590 | /* w32err is assigned so one could put a breakpoint here and |
| 3591 | examine its value, when GetFileInformationByHandle |
| 3592 | fails. */ |
| 3593 | DWORD w32err = GetLastError (); |
| 3594 | |
| 3595 | switch (w32err) |
| 3596 | { |
| 3597 | case ERROR_FILE_NOT_FOUND: /* can this ever happen? */ |
| 3598 | errno = ENOENT; |
| 3599 | return -1; |
| 3600 | } |
| 3601 | } |
| 3602 | |
| 3603 | /* Test for a symlink before testing for a directory, since |
| 3604 | symlinks to directories have the directory bit set, but we |
| 3605 | don't want them to appear as directories. */ |
| 3606 | if (is_a_symlink && !follow_symlinks) |
| 3607 | buf->st_mode = S_IFLNK; |
| 3608 | else if (fattrs & FILE_ATTRIBUTE_DIRECTORY) |
| 3609 | buf->st_mode = S_IFDIR; |
| 3610 | else |
| 3611 | { |
| 3612 | DWORD ftype = GetFileType (fh); |
| 3613 | |
| 3614 | switch (ftype) |
| 3615 | { |
| 3616 | case FILE_TYPE_DISK: |
| 3617 | buf->st_mode = S_IFREG; |
| 3618 | break; |
| 3619 | case FILE_TYPE_PIPE: |
| 3620 | buf->st_mode = S_IFIFO; |
| 3621 | break; |
| 3622 | case FILE_TYPE_CHAR: |
| 3623 | case FILE_TYPE_UNKNOWN: |
| 3624 | default: |
| 3625 | buf->st_mode = S_IFCHR; |
| 3626 | } |
| 3627 | } |
| 3628 | /* We produce the fallback owner and group data, based on the |
| 3629 | current user that runs Emacs, in the following cases: |
| 3630 | |
| 3631 | . this is Windows 9X |
| 3632 | . getting security by handle failed, and we need to produce |
| 3633 | information for the target of a symlink (this is better |
| 3634 | than producing a potentially misleading info about the |
| 3635 | symlink itself) |
| 3636 | |
| 3637 | If getting security by handle fails, and we don't need to |
| 3638 | resolve symlinks, we try getting security by name. */ |
| 3639 | if (is_windows_9x () != TRUE) |
| 3640 | psd = get_file_security_desc_by_handle (fh); |
| 3641 | if (psd) |
| 3642 | { |
| 3643 | get_file_owner_and_group (psd, name, buf); |
| 3644 | LocalFree (psd); |
| 3645 | } |
| 3646 | else if (is_windows_9x () == TRUE) |
| 3647 | get_file_owner_and_group (NULL, name, buf); |
| 3648 | else if (!(is_a_symlink && follow_symlinks)) |
| 3649 | { |
| 3650 | psd = get_file_security_desc_by_name (name); |
| 3651 | get_file_owner_and_group (psd, name, buf); |
| 3652 | xfree (psd); |
| 3653 | } |
| 3654 | else |
| 3655 | get_file_owner_and_group (NULL, name, buf); |
| 3656 | CloseHandle (fh); |
| 3657 | } |
| 3658 | else |
| 3659 | { |
| 3660 | no_true_file_attributes: |
| 3661 | /* Plan B: Either getting a handle on the file failed, or the |
| 3662 | caller explicitly asked us to not bother making this |
| 3663 | information more accurate. |
| 3664 | |
| 3665 | Implementation note: In Plan B, we never bother to resolve |
| 3666 | symlinks, even if we got here because we tried Plan A and |
| 3667 | failed. That's because, even if the caller asked for extra |
| 3668 | precision by setting Vw32_get_true_file_attributes to t, |
| 3669 | resolving symlinks requires acquiring a file handle to the |
| 3670 | symlink, which we already know will fail. And if the user |
| 3671 | did not ask for extra precision, resolving symlinks will fly |
| 3672 | in the face of that request, since the user then wants the |
| 3673 | lightweight version of the code. */ |
| 3674 | rootdir = (path >= save_name + len - 1 |
| 3675 | && (IS_DIRECTORY_SEP (*path) || *path == 0)); |
| 3676 | |
| 3677 | /* If name is "c:/.." or "/.." then stat "c:/" or "/". */ |
| 3678 | r = IS_DEVICE_SEP (name[1]) ? &name[2] : name; |
| 3679 | if (IS_DIRECTORY_SEP (r[0]) |
| 3680 | && r[1] == '.' && r[2] == '.' && r[3] == '\0') |
| 3681 | r[1] = r[2] = '\0'; |
| 3682 | |
| 3683 | /* Note: If NAME is a symlink to the root of a UNC volume |
| 3684 | (i.e. "\\SERVER"), we will not detect that here, and we will |
| 3685 | return data about the symlink as result of FindFirst below. |
| 3686 | This is unfortunate, but that marginal use case does not |
| 3687 | justify a call to chase_symlinks which would impose a penalty |
| 3688 | on all the other use cases. (We get here for symlinks to |
| 3689 | roots of UNC volumes because CreateFile above fails for them, |
| 3690 | unlike with symlinks to root directories X:\ of drives.) */ |
| 3691 | if (is_unc_volume (name)) |
| 3692 | { |
| 3693 | fattrs = unc_volume_file_attributes (name); |
| 3694 | if (fattrs == -1) |
| 3695 | return -1; |
| 3696 | |
| 3697 | ctime = atime = wtime = utc_base_ft; |
| 3698 | } |
| 3699 | else if (rootdir) |
| 3700 | { |
| 3701 | if (!IS_DIRECTORY_SEP (name[len-1])) |
| 3702 | strcat (name, "\\"); |
| 3703 | if (GetDriveType (name) < 2) |
| 3704 | { |
| 3705 | errno = ENOENT; |
| 3706 | return -1; |
| 3707 | } |
| 3708 | |
| 3709 | fattrs = FILE_ATTRIBUTE_DIRECTORY; |
| 3710 | ctime = atime = wtime = utc_base_ft; |
| 3711 | } |
| 3712 | else |
| 3713 | { |
| 3714 | if (IS_DIRECTORY_SEP (name[len-1])) |
| 3715 | name[len - 1] = 0; |
| 3716 | |
| 3717 | /* (This is hacky, but helps when doing file completions on |
| 3718 | network drives.) Optimize by using information available from |
| 3719 | active readdir if possible. */ |
| 3720 | len = strlen (dir_pathname); |
| 3721 | if (IS_DIRECTORY_SEP (dir_pathname[len-1])) |
| 3722 | len--; |
| 3723 | if (dir_find_handle != INVALID_HANDLE_VALUE |
| 3724 | && !(is_a_symlink && follow_symlinks) |
| 3725 | && strnicmp (save_name, dir_pathname, len) == 0 |
| 3726 | && IS_DIRECTORY_SEP (name[len]) |
| 3727 | && xstrcasecmp (name + len + 1, dir_static.d_name) == 0) |
| 3728 | { |
| 3729 | /* This was the last entry returned by readdir. */ |
| 3730 | wfd = dir_find_data; |
| 3731 | } |
| 3732 | else |
| 3733 | { |
| 3734 | logon_network_drive (name); |
| 3735 | |
| 3736 | fh = FindFirstFile (name, &wfd); |
| 3737 | if (fh == INVALID_HANDLE_VALUE) |
| 3738 | { |
| 3739 | errno = ENOENT; |
| 3740 | return -1; |
| 3741 | } |
| 3742 | FindClose (fh); |
| 3743 | } |
| 3744 | /* Note: if NAME is a symlink, the information we get from |
| 3745 | FindFirstFile is for the symlink, not its target. */ |
| 3746 | fattrs = wfd.dwFileAttributes; |
| 3747 | ctime = wfd.ftCreationTime; |
| 3748 | atime = wfd.ftLastAccessTime; |
| 3749 | wtime = wfd.ftLastWriteTime; |
| 3750 | fs_high = wfd.nFileSizeHigh; |
| 3751 | fs_low = wfd.nFileSizeLow; |
| 3752 | fake_inode = 0; |
| 3753 | nlinks = 1; |
| 3754 | serialnum = volume_info.serialnum; |
| 3755 | } |
| 3756 | if (is_a_symlink && !follow_symlinks) |
| 3757 | buf->st_mode = S_IFLNK; |
| 3758 | else if (fattrs & FILE_ATTRIBUTE_DIRECTORY) |
| 3759 | buf->st_mode = S_IFDIR; |
| 3760 | else |
| 3761 | buf->st_mode = S_IFREG; |
| 3762 | |
| 3763 | get_file_owner_and_group (NULL, name, buf); |
| 3764 | } |
| 3765 | |
| 3766 | #if 0 |
| 3767 | /* Not sure if there is any point in this. */ |
| 3768 | if (!NILP (Vw32_generate_fake_inodes)) |
| 3769 | fake_inode = generate_inode_val (name); |
| 3770 | else if (fake_inode == 0) |
| 3771 | { |
| 3772 | /* For want of something better, try to make everything unique. */ |
| 3773 | static DWORD gen_num = 0; |
| 3774 | fake_inode = ++gen_num; |
| 3775 | } |
| 3776 | #endif |
| 3777 | |
| 3778 | buf->st_ino = fake_inode; |
| 3779 | |
| 3780 | buf->st_dev = serialnum; |
| 3781 | buf->st_rdev = serialnum; |
| 3782 | |
| 3783 | buf->st_size = fs_high; |
| 3784 | buf->st_size <<= 32; |
| 3785 | buf->st_size += fs_low; |
| 3786 | buf->st_nlink = nlinks; |
| 3787 | |
| 3788 | /* Convert timestamps to Unix format. */ |
| 3789 | buf->st_mtime = convert_time (wtime); |
| 3790 | buf->st_atime = convert_time (atime); |
| 3791 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; |
| 3792 | buf->st_ctime = convert_time (ctime); |
| 3793 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; |
| 3794 | |
| 3795 | /* determine rwx permissions */ |
| 3796 | if (is_a_symlink && !follow_symlinks) |
| 3797 | permission = S_IREAD | S_IWRITE | S_IEXEC; /* Posix expectations */ |
| 3798 | else |
| 3799 | { |
| 3800 | if (fattrs & FILE_ATTRIBUTE_READONLY) |
| 3801 | permission = S_IREAD; |
| 3802 | else |
| 3803 | permission = S_IREAD | S_IWRITE; |
| 3804 | |
| 3805 | if (fattrs & FILE_ATTRIBUTE_DIRECTORY) |
| 3806 | permission |= S_IEXEC; |
| 3807 | else if (is_exec (name)) |
| 3808 | permission |= S_IEXEC; |
| 3809 | } |
| 3810 | |
| 3811 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); |
| 3812 | |
| 3813 | return 0; |
| 3814 | } |
| 3815 | |
| 3816 | int |
| 3817 | stat (const char * path, struct stat * buf) |
| 3818 | { |
| 3819 | return stat_worker (path, buf, 1); |
| 3820 | } |
| 3821 | |
| 3822 | int |
| 3823 | lstat (const char * path, struct stat * buf) |
| 3824 | { |
| 3825 | return stat_worker (path, buf, 0); |
| 3826 | } |
| 3827 | |
| 3828 | /* Provide fstat and utime as well as stat for consistent handling of |
| 3829 | file timestamps. */ |
| 3830 | int |
| 3831 | fstat (int desc, struct stat * buf) |
| 3832 | { |
| 3833 | HANDLE fh = (HANDLE) _get_osfhandle (desc); |
| 3834 | BY_HANDLE_FILE_INFORMATION info; |
| 3835 | unsigned __int64 fake_inode; |
| 3836 | int permission; |
| 3837 | |
| 3838 | switch (GetFileType (fh) & ~FILE_TYPE_REMOTE) |
| 3839 | { |
| 3840 | case FILE_TYPE_DISK: |
| 3841 | buf->st_mode = S_IFREG; |
| 3842 | if (!GetFileInformationByHandle (fh, &info)) |
| 3843 | { |
| 3844 | errno = EACCES; |
| 3845 | return -1; |
| 3846 | } |
| 3847 | break; |
| 3848 | case FILE_TYPE_PIPE: |
| 3849 | buf->st_mode = S_IFIFO; |
| 3850 | goto non_disk; |
| 3851 | case FILE_TYPE_CHAR: |
| 3852 | case FILE_TYPE_UNKNOWN: |
| 3853 | default: |
| 3854 | buf->st_mode = S_IFCHR; |
| 3855 | non_disk: |
| 3856 | memset (&info, 0, sizeof (info)); |
| 3857 | info.dwFileAttributes = 0; |
| 3858 | info.ftCreationTime = utc_base_ft; |
| 3859 | info.ftLastAccessTime = utc_base_ft; |
| 3860 | info.ftLastWriteTime = utc_base_ft; |
| 3861 | } |
| 3862 | |
| 3863 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 3864 | buf->st_mode = S_IFDIR; |
| 3865 | |
| 3866 | buf->st_nlink = info.nNumberOfLinks; |
| 3867 | /* Might as well use file index to fake inode values, but this |
| 3868 | is not guaranteed to be unique unless we keep a handle open |
| 3869 | all the time (even then there are situations where it is |
| 3870 | not unique). Reputedly, there are at most 48 bits of info |
| 3871 | (on NTFS, presumably less on FAT). */ |
| 3872 | fake_inode = info.nFileIndexHigh; |
| 3873 | fake_inode <<= 32; |
| 3874 | fake_inode += info.nFileIndexLow; |
| 3875 | |
| 3876 | /* MSVC defines _ino_t to be short; other libc's might not. */ |
| 3877 | if (sizeof (buf->st_ino) == 2) |
| 3878 | buf->st_ino = fake_inode ^ (fake_inode >> 16); |
| 3879 | else |
| 3880 | buf->st_ino = fake_inode; |
| 3881 | |
| 3882 | /* Consider files to belong to current user. |
| 3883 | FIXME: this should use GetSecurityInfo API, but it is only |
| 3884 | available for _WIN32_WINNT >= 0x501. */ |
| 3885 | buf->st_uid = dflt_passwd.pw_uid; |
| 3886 | buf->st_gid = dflt_passwd.pw_gid; |
| 3887 | strcpy (buf->st_uname, dflt_passwd.pw_name); |
| 3888 | strcpy (buf->st_gname, dflt_group.gr_name); |
| 3889 | |
| 3890 | buf->st_dev = info.dwVolumeSerialNumber; |
| 3891 | buf->st_rdev = info.dwVolumeSerialNumber; |
| 3892 | |
| 3893 | buf->st_size = info.nFileSizeHigh; |
| 3894 | buf->st_size <<= 32; |
| 3895 | buf->st_size += info.nFileSizeLow; |
| 3896 | |
| 3897 | /* Convert timestamps to Unix format. */ |
| 3898 | buf->st_mtime = convert_time (info.ftLastWriteTime); |
| 3899 | buf->st_atime = convert_time (info.ftLastAccessTime); |
| 3900 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; |
| 3901 | buf->st_ctime = convert_time (info.ftCreationTime); |
| 3902 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; |
| 3903 | |
| 3904 | /* determine rwx permissions */ |
| 3905 | if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY) |
| 3906 | permission = S_IREAD; |
| 3907 | else |
| 3908 | permission = S_IREAD | S_IWRITE; |
| 3909 | |
| 3910 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 3911 | permission |= S_IEXEC; |
| 3912 | else |
| 3913 | { |
| 3914 | #if 0 /* no way of knowing the filename */ |
| 3915 | char * p = strrchr (name, '.'); |
| 3916 | if (p != NULL && |
| 3917 | (xstrcasecmp (p, ".exe") == 0 || |
| 3918 | xstrcasecmp (p, ".com") == 0 || |
| 3919 | xstrcasecmp (p, ".bat") == 0 || |
| 3920 | xstrcasecmp (p, ".cmd") == 0)) |
| 3921 | permission |= S_IEXEC; |
| 3922 | #endif |
| 3923 | } |
| 3924 | |
| 3925 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); |
| 3926 | |
| 3927 | return 0; |
| 3928 | } |
| 3929 | |
| 3930 | int |
| 3931 | utime (const char *name, struct utimbuf *times) |
| 3932 | { |
| 3933 | struct utimbuf deftime; |
| 3934 | HANDLE fh; |
| 3935 | FILETIME mtime; |
| 3936 | FILETIME atime; |
| 3937 | |
| 3938 | if (times == NULL) |
| 3939 | { |
| 3940 | deftime.modtime = deftime.actime = time (NULL); |
| 3941 | times = &deftime; |
| 3942 | } |
| 3943 | |
| 3944 | /* Need write access to set times. */ |
| 3945 | fh = CreateFile (name, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, |
| 3946 | 0, OPEN_EXISTING, 0, NULL); |
| 3947 | if (fh) |
| 3948 | { |
| 3949 | convert_from_time_t (times->actime, &atime); |
| 3950 | convert_from_time_t (times->modtime, &mtime); |
| 3951 | if (!SetFileTime (fh, NULL, &atime, &mtime)) |
| 3952 | { |
| 3953 | CloseHandle (fh); |
| 3954 | errno = EACCES; |
| 3955 | return -1; |
| 3956 | } |
| 3957 | CloseHandle (fh); |
| 3958 | } |
| 3959 | else |
| 3960 | { |
| 3961 | errno = EINVAL; |
| 3962 | return -1; |
| 3963 | } |
| 3964 | return 0; |
| 3965 | } |
| 3966 | |
| 3967 | \f |
| 3968 | /* Symlink-related functions. */ |
| 3969 | #ifndef SYMBOLIC_LINK_FLAG_DIRECTORY |
| 3970 | #define SYMBOLIC_LINK_FLAG_DIRECTORY 0x1 |
| 3971 | #endif |
| 3972 | |
| 3973 | int |
| 3974 | symlink (char const *filename, char const *linkname) |
| 3975 | { |
| 3976 | char linkfn[MAX_PATH], *tgtfn; |
| 3977 | DWORD flags = 0; |
| 3978 | int dir_access, filename_ends_in_slash; |
| 3979 | |
| 3980 | /* Diagnostics follows Posix as much as possible. */ |
| 3981 | if (filename == NULL || linkname == NULL) |
| 3982 | { |
| 3983 | errno = EFAULT; |
| 3984 | return -1; |
| 3985 | } |
| 3986 | if (!*filename) |
| 3987 | { |
| 3988 | errno = ENOENT; |
| 3989 | return -1; |
| 3990 | } |
| 3991 | if (strlen (filename) > MAX_PATH || strlen (linkname) > MAX_PATH) |
| 3992 | { |
| 3993 | errno = ENAMETOOLONG; |
| 3994 | return -1; |
| 3995 | } |
| 3996 | |
| 3997 | strcpy (linkfn, map_w32_filename (linkname, NULL)); |
| 3998 | if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0) |
| 3999 | { |
| 4000 | errno = EPERM; |
| 4001 | return -1; |
| 4002 | } |
| 4003 | |
| 4004 | /* Note: since empty FILENAME was already rejected, we can safely |
| 4005 | refer to FILENAME[1]. */ |
| 4006 | if (!(IS_DIRECTORY_SEP (filename[0]) || IS_DEVICE_SEP (filename[1]))) |
| 4007 | { |
| 4008 | /* Non-absolute FILENAME is understood as being relative to |
| 4009 | LINKNAME's directory. We need to prepend that directory to |
| 4010 | FILENAME to get correct results from sys_access below, since |
| 4011 | otherwise it will interpret FILENAME relative to the |
| 4012 | directory where the Emacs process runs. Note that |
| 4013 | make-symbolic-link always makes sure LINKNAME is a fully |
| 4014 | expanded file name. */ |
| 4015 | char tem[MAX_PATH]; |
| 4016 | char *p = linkfn + strlen (linkfn); |
| 4017 | |
| 4018 | while (p > linkfn && !IS_ANY_SEP (p[-1])) |
| 4019 | p--; |
| 4020 | if (p > linkfn) |
| 4021 | strncpy (tem, linkfn, p - linkfn); |
| 4022 | tem[p - linkfn] = '\0'; |
| 4023 | strcat (tem, filename); |
| 4024 | dir_access = sys_access (tem, D_OK); |
| 4025 | } |
| 4026 | else |
| 4027 | dir_access = sys_access (filename, D_OK); |
| 4028 | |
| 4029 | /* Since Windows distinguishes between symlinks to directories and |
| 4030 | to files, we provide a kludgy feature: if FILENAME doesn't |
| 4031 | exist, but ends in a slash, we create a symlink to directory. If |
| 4032 | FILENAME exists and is a directory, we always create a symlink to |
| 4033 | directory. */ |
| 4034 | filename_ends_in_slash = IS_DIRECTORY_SEP (filename[strlen (filename) - 1]); |
| 4035 | if (dir_access == 0 || filename_ends_in_slash) |
| 4036 | flags = SYMBOLIC_LINK_FLAG_DIRECTORY; |
| 4037 | |
| 4038 | tgtfn = (char *)map_w32_filename (filename, NULL); |
| 4039 | if (filename_ends_in_slash) |
| 4040 | tgtfn[strlen (tgtfn) - 1] = '\0'; |
| 4041 | |
| 4042 | errno = 0; |
| 4043 | if (!create_symbolic_link (linkfn, tgtfn, flags)) |
| 4044 | { |
| 4045 | /* ENOSYS is set by create_symbolic_link, when it detects that |
| 4046 | the OS doesn't support the CreateSymbolicLink API. */ |
| 4047 | if (errno != ENOSYS) |
| 4048 | { |
| 4049 | DWORD w32err = GetLastError (); |
| 4050 | |
| 4051 | switch (w32err) |
| 4052 | { |
| 4053 | /* ERROR_SUCCESS is sometimes returned when LINKFN and |
| 4054 | TGTFN point to the same file name, go figure. */ |
| 4055 | case ERROR_SUCCESS: |
| 4056 | case ERROR_FILE_EXISTS: |
| 4057 | errno = EEXIST; |
| 4058 | break; |
| 4059 | case ERROR_ACCESS_DENIED: |
| 4060 | errno = EACCES; |
| 4061 | break; |
| 4062 | case ERROR_FILE_NOT_FOUND: |
| 4063 | case ERROR_PATH_NOT_FOUND: |
| 4064 | case ERROR_BAD_NETPATH: |
| 4065 | case ERROR_INVALID_REPARSE_DATA: |
| 4066 | errno = ENOENT; |
| 4067 | break; |
| 4068 | case ERROR_DIRECTORY: |
| 4069 | errno = EISDIR; |
| 4070 | break; |
| 4071 | case ERROR_PRIVILEGE_NOT_HELD: |
| 4072 | case ERROR_NOT_ALL_ASSIGNED: |
| 4073 | errno = EPERM; |
| 4074 | break; |
| 4075 | case ERROR_DISK_FULL: |
| 4076 | errno = ENOSPC; |
| 4077 | break; |
| 4078 | default: |
| 4079 | errno = EINVAL; |
| 4080 | break; |
| 4081 | } |
| 4082 | } |
| 4083 | return -1; |
| 4084 | } |
| 4085 | return 0; |
| 4086 | } |
| 4087 | |
| 4088 | /* A quick inexpensive test of whether FILENAME identifies a file that |
| 4089 | is a symlink. Returns non-zero if it is, zero otherwise. FILENAME |
| 4090 | must already be in the normalized form returned by |
| 4091 | map_w32_filename. |
| 4092 | |
| 4093 | Note: for repeated operations on many files, it is best to test |
| 4094 | whether the underlying volume actually supports symlinks, by |
| 4095 | testing the FILE_SUPPORTS_REPARSE_POINTS bit in volume's flags, and |
| 4096 | avoid the call to this function if it doesn't. That's because the |
| 4097 | call to GetFileAttributes takes a non-negligible time, especially |
| 4098 | on non-local or removable filesystems. See stat_worker for an |
| 4099 | example of how to do that. */ |
| 4100 | static int |
| 4101 | is_symlink (const char *filename) |
| 4102 | { |
| 4103 | DWORD attrs; |
| 4104 | WIN32_FIND_DATA wfd; |
| 4105 | HANDLE fh; |
| 4106 | |
| 4107 | attrs = GetFileAttributes (filename); |
| 4108 | if (attrs == -1) |
| 4109 | { |
| 4110 | DWORD w32err = GetLastError (); |
| 4111 | |
| 4112 | switch (w32err) |
| 4113 | { |
| 4114 | case ERROR_BAD_NETPATH: /* network share, can't be a symlink */ |
| 4115 | break; |
| 4116 | case ERROR_ACCESS_DENIED: |
| 4117 | errno = EACCES; |
| 4118 | break; |
| 4119 | case ERROR_FILE_NOT_FOUND: |
| 4120 | case ERROR_PATH_NOT_FOUND: |
| 4121 | default: |
| 4122 | errno = ENOENT; |
| 4123 | break; |
| 4124 | } |
| 4125 | return 0; |
| 4126 | } |
| 4127 | if ((attrs & FILE_ATTRIBUTE_REPARSE_POINT) == 0) |
| 4128 | return 0; |
| 4129 | logon_network_drive (filename); |
| 4130 | fh = FindFirstFile (filename, &wfd); |
| 4131 | if (fh == INVALID_HANDLE_VALUE) |
| 4132 | return 0; |
| 4133 | FindClose (fh); |
| 4134 | return (wfd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0 |
| 4135 | && (wfd.dwReserved0 & IO_REPARSE_TAG_SYMLINK) == IO_REPARSE_TAG_SYMLINK; |
| 4136 | } |
| 4137 | |
| 4138 | /* If NAME identifies a symbolic link, copy into BUF the file name of |
| 4139 | the symlink's target. Copy at most BUF_SIZE bytes, and do NOT |
| 4140 | null-terminate the target name, even if it fits. Return the number |
| 4141 | of bytes copied, or -1 if NAME is not a symlink or any error was |
| 4142 | encountered while resolving it. The file name copied into BUF is |
| 4143 | encoded in the current ANSI codepage. */ |
| 4144 | ssize_t |
| 4145 | readlink (const char *name, char *buf, size_t buf_size) |
| 4146 | { |
| 4147 | const char *path; |
| 4148 | TOKEN_PRIVILEGES privs; |
| 4149 | int restore_privs = 0; |
| 4150 | HANDLE sh; |
| 4151 | ssize_t retval; |
| 4152 | |
| 4153 | if (name == NULL) |
| 4154 | { |
| 4155 | errno = EFAULT; |
| 4156 | return -1; |
| 4157 | } |
| 4158 | if (!*name) |
| 4159 | { |
| 4160 | errno = ENOENT; |
| 4161 | return -1; |
| 4162 | } |
| 4163 | |
| 4164 | path = map_w32_filename (name, NULL); |
| 4165 | |
| 4166 | if (strlen (path) > MAX_PATH) |
| 4167 | { |
| 4168 | errno = ENAMETOOLONG; |
| 4169 | return -1; |
| 4170 | } |
| 4171 | |
| 4172 | errno = 0; |
| 4173 | if (is_windows_9x () == TRUE |
| 4174 | || (volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0 |
| 4175 | || !is_symlink (path)) |
| 4176 | { |
| 4177 | if (!errno) |
| 4178 | errno = EINVAL; /* not a symlink */ |
| 4179 | return -1; |
| 4180 | } |
| 4181 | |
| 4182 | /* Done with simple tests, now we're in for some _real_ work. */ |
| 4183 | if (enable_privilege (SE_BACKUP_NAME, TRUE, &privs)) |
| 4184 | restore_privs = 1; |
| 4185 | /* Implementation note: From here and onward, don't return early, |
| 4186 | since that will fail to restore the original set of privileges of |
| 4187 | the calling thread. */ |
| 4188 | |
| 4189 | retval = -1; /* not too optimistic, are we? */ |
| 4190 | |
| 4191 | /* Note: In the next call to CreateFile, we use zero as the 2nd |
| 4192 | argument because, when the symlink is a hidden/system file, |
| 4193 | e.g. 'C:\Users\All Users', GENERIC_READ fails with |
| 4194 | ERROR_ACCESS_DENIED. Zero seems to work just fine, both for file |
| 4195 | and directory symlinks. */ |
| 4196 | sh = CreateFile (path, 0, 0, NULL, OPEN_EXISTING, |
| 4197 | FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS, |
| 4198 | NULL); |
| 4199 | if (sh != INVALID_HANDLE_VALUE) |
| 4200 | { |
| 4201 | BYTE reparse_buf[MAXIMUM_REPARSE_DATA_BUFFER_SIZE]; |
| 4202 | REPARSE_DATA_BUFFER *reparse_data = (REPARSE_DATA_BUFFER *)&reparse_buf[0]; |
| 4203 | DWORD retbytes; |
| 4204 | |
| 4205 | if (!DeviceIoControl (sh, FSCTL_GET_REPARSE_POINT, NULL, 0, |
| 4206 | reparse_buf, MAXIMUM_REPARSE_DATA_BUFFER_SIZE, |
| 4207 | &retbytes, NULL)) |
| 4208 | errno = EIO; |
| 4209 | else if (reparse_data->ReparseTag != IO_REPARSE_TAG_SYMLINK) |
| 4210 | errno = EINVAL; |
| 4211 | else |
| 4212 | { |
| 4213 | /* Copy the link target name, in wide characters, fro |
| 4214 | reparse_data, then convert it to multibyte encoding in |
| 4215 | the current locale's codepage. */ |
| 4216 | WCHAR *lwname; |
| 4217 | BYTE lname[MAX_PATH]; |
| 4218 | USHORT lname_len; |
| 4219 | USHORT lwname_len = |
| 4220 | reparse_data->SymbolicLinkReparseBuffer.PrintNameLength; |
| 4221 | WCHAR *lwname_src = |
| 4222 | reparse_data->SymbolicLinkReparseBuffer.PathBuffer |
| 4223 | + reparse_data->SymbolicLinkReparseBuffer.PrintNameOffset/sizeof(WCHAR); |
| 4224 | |
| 4225 | /* According to MSDN, PrintNameLength does not include the |
| 4226 | terminating null character. */ |
| 4227 | lwname = alloca ((lwname_len + 1) * sizeof(WCHAR)); |
| 4228 | memcpy (lwname, lwname_src, lwname_len); |
| 4229 | lwname[lwname_len/sizeof(WCHAR)] = 0; /* null-terminate */ |
| 4230 | |
| 4231 | /* FIXME: Should we use the current file-name coding system |
| 4232 | instead of the fixed value of the ANSI codepage? */ |
| 4233 | lname_len = WideCharToMultiByte (w32_ansi_code_page, 0, lwname, -1, |
| 4234 | lname, MAX_PATH, NULL, NULL); |
| 4235 | if (!lname_len) |
| 4236 | { |
| 4237 | /* WideCharToMultiByte failed. */ |
| 4238 | DWORD w32err1 = GetLastError (); |
| 4239 | |
| 4240 | switch (w32err1) |
| 4241 | { |
| 4242 | case ERROR_INSUFFICIENT_BUFFER: |
| 4243 | errno = ENAMETOOLONG; |
| 4244 | break; |
| 4245 | case ERROR_INVALID_PARAMETER: |
| 4246 | errno = EFAULT; |
| 4247 | break; |
| 4248 | case ERROR_NO_UNICODE_TRANSLATION: |
| 4249 | errno = ENOENT; |
| 4250 | break; |
| 4251 | default: |
| 4252 | errno = EINVAL; |
| 4253 | break; |
| 4254 | } |
| 4255 | } |
| 4256 | else |
| 4257 | { |
| 4258 | size_t size_to_copy = buf_size; |
| 4259 | BYTE *p = lname; |
| 4260 | BYTE *pend = p + lname_len; |
| 4261 | |
| 4262 | /* Normalize like dostounix_filename does, but we don't |
| 4263 | want to assume that lname is null-terminated. */ |
| 4264 | if (*p && p[1] == ':' && *p >= 'A' && *p <= 'Z') |
| 4265 | *p += 'a' - 'A'; |
| 4266 | while (p <= pend) |
| 4267 | { |
| 4268 | if (*p == '\\') |
| 4269 | *p = '/'; |
| 4270 | ++p; |
| 4271 | } |
| 4272 | /* Testing for null-terminated LNAME is paranoia: |
| 4273 | WideCharToMultiByte should always return a |
| 4274 | null-terminated string when its 4th argument is -1 |
| 4275 | and its 3rd argument is null-terminated (which they |
| 4276 | are, see above). */ |
| 4277 | if (lname[lname_len - 1] == '\0') |
| 4278 | lname_len--; |
| 4279 | if (lname_len <= buf_size) |
| 4280 | size_to_copy = lname_len; |
| 4281 | strncpy (buf, lname, size_to_copy); |
| 4282 | /* Success! */ |
| 4283 | retval = size_to_copy; |
| 4284 | } |
| 4285 | } |
| 4286 | CloseHandle (sh); |
| 4287 | } |
| 4288 | else |
| 4289 | { |
| 4290 | /* CreateFile failed. */ |
| 4291 | DWORD w32err2 = GetLastError (); |
| 4292 | |
| 4293 | switch (w32err2) |
| 4294 | { |
| 4295 | case ERROR_FILE_NOT_FOUND: |
| 4296 | case ERROR_PATH_NOT_FOUND: |
| 4297 | errno = ENOENT; |
| 4298 | break; |
| 4299 | case ERROR_ACCESS_DENIED: |
| 4300 | case ERROR_TOO_MANY_OPEN_FILES: |
| 4301 | errno = EACCES; |
| 4302 | break; |
| 4303 | default: |
| 4304 | errno = EPERM; |
| 4305 | break; |
| 4306 | } |
| 4307 | } |
| 4308 | if (restore_privs) |
| 4309 | { |
| 4310 | restore_privilege (&privs); |
| 4311 | revert_to_self (); |
| 4312 | } |
| 4313 | |
| 4314 | return retval; |
| 4315 | } |
| 4316 | |
| 4317 | /* If FILE is a symlink, return its target (stored in a static |
| 4318 | buffer); otherwise return FILE. |
| 4319 | |
| 4320 | This function repeatedly resolves symlinks in the last component of |
| 4321 | a chain of symlink file names, as in foo -> bar -> baz -> ..., |
| 4322 | until it arrives at a file whose last component is not a symlink, |
| 4323 | or some error occurs. It returns the target of the last |
| 4324 | successfully resolved symlink in the chain. If it succeeds to |
| 4325 | resolve even a single symlink, the value returned is an absolute |
| 4326 | file name with backslashes (result of GetFullPathName). By |
| 4327 | contrast, if the original FILE is returned, it is unaltered. |
| 4328 | |
| 4329 | Note: This function can set errno even if it succeeds. |
| 4330 | |
| 4331 | Implementation note: we only resolve the last portion ("basename") |
| 4332 | of the argument FILE and of each following file in the chain, |
| 4333 | disregarding any possible symlinks in its leading directories. |
| 4334 | This is because Windows system calls and library functions |
| 4335 | transparently resolve symlinks in leading directories and return |
| 4336 | correct information, as long as the basename is not a symlink. */ |
| 4337 | static char * |
| 4338 | chase_symlinks (const char *file) |
| 4339 | { |
| 4340 | static char target[MAX_PATH]; |
| 4341 | char link[MAX_PATH]; |
| 4342 | ssize_t res, link_len; |
| 4343 | int loop_count = 0; |
| 4344 | |
| 4345 | if (is_windows_9x () == TRUE || !is_symlink (file)) |
| 4346 | return (char *)file; |
| 4347 | |
| 4348 | if ((link_len = GetFullPathName (file, MAX_PATH, link, NULL)) == 0) |
| 4349 | return (char *)file; |
| 4350 | |
| 4351 | target[0] = '\0'; |
| 4352 | do { |
| 4353 | |
| 4354 | /* Remove trailing slashes, as we want to resolve the last |
| 4355 | non-trivial part of the link name. */ |
| 4356 | while (link_len > 3 && IS_DIRECTORY_SEP (link[link_len-1])) |
| 4357 | link[link_len--] = '\0'; |
| 4358 | |
| 4359 | res = readlink (link, target, MAX_PATH); |
| 4360 | if (res > 0) |
| 4361 | { |
| 4362 | target[res] = '\0'; |
| 4363 | if (!(IS_DEVICE_SEP (target[1]) |
| 4364 | || (IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1])))) |
| 4365 | { |
| 4366 | /* Target is relative. Append it to the directory part of |
| 4367 | the symlink, then copy the result back to target. */ |
| 4368 | char *p = link + link_len; |
| 4369 | |
| 4370 | while (p > link && !IS_ANY_SEP (p[-1])) |
| 4371 | p--; |
| 4372 | strcpy (p, target); |
| 4373 | strcpy (target, link); |
| 4374 | } |
| 4375 | /* Resolve any "." and ".." to get a fully-qualified file name |
| 4376 | in link[] again. */ |
| 4377 | link_len = GetFullPathName (target, MAX_PATH, link, NULL); |
| 4378 | } |
| 4379 | } while (res > 0 && link_len > 0 && ++loop_count <= 100); |
| 4380 | |
| 4381 | if (loop_count > 100) |
| 4382 | errno = ELOOP; |
| 4383 | |
| 4384 | if (target[0] == '\0') /* not a single call to readlink succeeded */ |
| 4385 | return (char *)file; |
| 4386 | return target; |
| 4387 | } |
| 4388 | |
| 4389 | /* MS-Windows version of careadlinkat (cf. ../lib/careadlinkat.c). We |
| 4390 | have a fixed max size for file names, so we don't need the kind of |
| 4391 | alloc/malloc/realloc dance the gnulib version does. We also don't |
| 4392 | support FD-relative symlinks. */ |
| 4393 | char * |
| 4394 | careadlinkat (int fd, char const *filename, |
| 4395 | char *buffer, size_t buffer_size, |
| 4396 | struct allocator const *alloc, |
| 4397 | ssize_t (*preadlinkat) (int, char const *, char *, size_t)) |
| 4398 | { |
| 4399 | char linkname[MAX_PATH]; |
| 4400 | ssize_t link_size; |
| 4401 | |
| 4402 | if (fd != AT_FDCWD) |
| 4403 | { |
| 4404 | errno = EINVAL; |
| 4405 | return NULL; |
| 4406 | } |
| 4407 | |
| 4408 | link_size = preadlinkat (fd, filename, linkname, sizeof(linkname)); |
| 4409 | |
| 4410 | if (link_size > 0) |
| 4411 | { |
| 4412 | char *retval = buffer; |
| 4413 | |
| 4414 | linkname[link_size++] = '\0'; |
| 4415 | if (link_size > buffer_size) |
| 4416 | retval = (char *)(alloc ? alloc->allocate : xmalloc) (link_size); |
| 4417 | if (retval) |
| 4418 | memcpy (retval, linkname, link_size); |
| 4419 | |
| 4420 | return retval; |
| 4421 | } |
| 4422 | return NULL; |
| 4423 | } |
| 4424 | |
| 4425 | ssize_t |
| 4426 | careadlinkatcwd (int fd, char const *filename, char *buffer, |
| 4427 | size_t buffer_size) |
| 4428 | { |
| 4429 | (void) fd; |
| 4430 | return readlink (filename, buffer, buffer_size); |
| 4431 | } |
| 4432 | |
| 4433 | \f |
| 4434 | /* Support for browsing other processes and their attributes. See |
| 4435 | process.c for the Lisp bindings. */ |
| 4436 | |
| 4437 | /* Helper wrapper functions. */ |
| 4438 | |
| 4439 | static HANDLE WINAPI |
| 4440 | create_toolhelp32_snapshot (DWORD Flags, DWORD Ignored) |
| 4441 | { |
| 4442 | static CreateToolhelp32Snapshot_Proc s_pfn_Create_Toolhelp32_Snapshot = NULL; |
| 4443 | |
| 4444 | if (g_b_init_create_toolhelp32_snapshot == 0) |
| 4445 | { |
| 4446 | g_b_init_create_toolhelp32_snapshot = 1; |
| 4447 | s_pfn_Create_Toolhelp32_Snapshot = (CreateToolhelp32Snapshot_Proc) |
| 4448 | GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 4449 | "CreateToolhelp32Snapshot"); |
| 4450 | } |
| 4451 | if (s_pfn_Create_Toolhelp32_Snapshot == NULL) |
| 4452 | { |
| 4453 | return INVALID_HANDLE_VALUE; |
| 4454 | } |
| 4455 | return (s_pfn_Create_Toolhelp32_Snapshot (Flags, Ignored)); |
| 4456 | } |
| 4457 | |
| 4458 | static BOOL WINAPI |
| 4459 | process32_first (HANDLE hSnapshot, LPPROCESSENTRY32 lppe) |
| 4460 | { |
| 4461 | static Process32First_Proc s_pfn_Process32_First = NULL; |
| 4462 | |
| 4463 | if (g_b_init_process32_first == 0) |
| 4464 | { |
| 4465 | g_b_init_process32_first = 1; |
| 4466 | s_pfn_Process32_First = (Process32First_Proc) |
| 4467 | GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 4468 | "Process32First"); |
| 4469 | } |
| 4470 | if (s_pfn_Process32_First == NULL) |
| 4471 | { |
| 4472 | return FALSE; |
| 4473 | } |
| 4474 | return (s_pfn_Process32_First (hSnapshot, lppe)); |
| 4475 | } |
| 4476 | |
| 4477 | static BOOL WINAPI |
| 4478 | process32_next (HANDLE hSnapshot, LPPROCESSENTRY32 lppe) |
| 4479 | { |
| 4480 | static Process32Next_Proc s_pfn_Process32_Next = NULL; |
| 4481 | |
| 4482 | if (g_b_init_process32_next == 0) |
| 4483 | { |
| 4484 | g_b_init_process32_next = 1; |
| 4485 | s_pfn_Process32_Next = (Process32Next_Proc) |
| 4486 | GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 4487 | "Process32Next"); |
| 4488 | } |
| 4489 | if (s_pfn_Process32_Next == NULL) |
| 4490 | { |
| 4491 | return FALSE; |
| 4492 | } |
| 4493 | return (s_pfn_Process32_Next (hSnapshot, lppe)); |
| 4494 | } |
| 4495 | |
| 4496 | static BOOL WINAPI |
| 4497 | open_thread_token (HANDLE ThreadHandle, |
| 4498 | DWORD DesiredAccess, |
| 4499 | BOOL OpenAsSelf, |
| 4500 | PHANDLE TokenHandle) |
| 4501 | { |
| 4502 | static OpenThreadToken_Proc s_pfn_Open_Thread_Token = NULL; |
| 4503 | HMODULE hm_advapi32 = NULL; |
| 4504 | if (is_windows_9x () == TRUE) |
| 4505 | { |
| 4506 | SetLastError (ERROR_NOT_SUPPORTED); |
| 4507 | return FALSE; |
| 4508 | } |
| 4509 | if (g_b_init_open_thread_token == 0) |
| 4510 | { |
| 4511 | g_b_init_open_thread_token = 1; |
| 4512 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 4513 | s_pfn_Open_Thread_Token = |
| 4514 | (OpenThreadToken_Proc) GetProcAddress (hm_advapi32, "OpenThreadToken"); |
| 4515 | } |
| 4516 | if (s_pfn_Open_Thread_Token == NULL) |
| 4517 | { |
| 4518 | SetLastError (ERROR_NOT_SUPPORTED); |
| 4519 | return FALSE; |
| 4520 | } |
| 4521 | return ( |
| 4522 | s_pfn_Open_Thread_Token ( |
| 4523 | ThreadHandle, |
| 4524 | DesiredAccess, |
| 4525 | OpenAsSelf, |
| 4526 | TokenHandle) |
| 4527 | ); |
| 4528 | } |
| 4529 | |
| 4530 | static BOOL WINAPI |
| 4531 | impersonate_self (SECURITY_IMPERSONATION_LEVEL ImpersonationLevel) |
| 4532 | { |
| 4533 | static ImpersonateSelf_Proc s_pfn_Impersonate_Self = NULL; |
| 4534 | HMODULE hm_advapi32 = NULL; |
| 4535 | if (is_windows_9x () == TRUE) |
| 4536 | { |
| 4537 | return FALSE; |
| 4538 | } |
| 4539 | if (g_b_init_impersonate_self == 0) |
| 4540 | { |
| 4541 | g_b_init_impersonate_self = 1; |
| 4542 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 4543 | s_pfn_Impersonate_Self = |
| 4544 | (ImpersonateSelf_Proc) GetProcAddress (hm_advapi32, "ImpersonateSelf"); |
| 4545 | } |
| 4546 | if (s_pfn_Impersonate_Self == NULL) |
| 4547 | { |
| 4548 | return FALSE; |
| 4549 | } |
| 4550 | return s_pfn_Impersonate_Self (ImpersonationLevel); |
| 4551 | } |
| 4552 | |
| 4553 | static BOOL WINAPI |
| 4554 | revert_to_self (void) |
| 4555 | { |
| 4556 | static RevertToSelf_Proc s_pfn_Revert_To_Self = NULL; |
| 4557 | HMODULE hm_advapi32 = NULL; |
| 4558 | if (is_windows_9x () == TRUE) |
| 4559 | { |
| 4560 | return FALSE; |
| 4561 | } |
| 4562 | if (g_b_init_revert_to_self == 0) |
| 4563 | { |
| 4564 | g_b_init_revert_to_self = 1; |
| 4565 | hm_advapi32 = LoadLibrary ("Advapi32.dll"); |
| 4566 | s_pfn_Revert_To_Self = |
| 4567 | (RevertToSelf_Proc) GetProcAddress (hm_advapi32, "RevertToSelf"); |
| 4568 | } |
| 4569 | if (s_pfn_Revert_To_Self == NULL) |
| 4570 | { |
| 4571 | return FALSE; |
| 4572 | } |
| 4573 | return s_pfn_Revert_To_Self (); |
| 4574 | } |
| 4575 | |
| 4576 | static BOOL WINAPI |
| 4577 | get_process_memory_info (HANDLE h_proc, |
| 4578 | PPROCESS_MEMORY_COUNTERS mem_counters, |
| 4579 | DWORD bufsize) |
| 4580 | { |
| 4581 | static GetProcessMemoryInfo_Proc s_pfn_Get_Process_Memory_Info = NULL; |
| 4582 | HMODULE hm_psapi = NULL; |
| 4583 | if (is_windows_9x () == TRUE) |
| 4584 | { |
| 4585 | return FALSE; |
| 4586 | } |
| 4587 | if (g_b_init_get_process_memory_info == 0) |
| 4588 | { |
| 4589 | g_b_init_get_process_memory_info = 1; |
| 4590 | hm_psapi = LoadLibrary ("Psapi.dll"); |
| 4591 | if (hm_psapi) |
| 4592 | s_pfn_Get_Process_Memory_Info = (GetProcessMemoryInfo_Proc) |
| 4593 | GetProcAddress (hm_psapi, "GetProcessMemoryInfo"); |
| 4594 | } |
| 4595 | if (s_pfn_Get_Process_Memory_Info == NULL) |
| 4596 | { |
| 4597 | return FALSE; |
| 4598 | } |
| 4599 | return s_pfn_Get_Process_Memory_Info (h_proc, mem_counters, bufsize); |
| 4600 | } |
| 4601 | |
| 4602 | static BOOL WINAPI |
| 4603 | get_process_working_set_size (HANDLE h_proc, |
| 4604 | DWORD *minrss, |
| 4605 | DWORD *maxrss) |
| 4606 | { |
| 4607 | static GetProcessWorkingSetSize_Proc |
| 4608 | s_pfn_Get_Process_Working_Set_Size = NULL; |
| 4609 | |
| 4610 | if (is_windows_9x () == TRUE) |
| 4611 | { |
| 4612 | return FALSE; |
| 4613 | } |
| 4614 | if (g_b_init_get_process_working_set_size == 0) |
| 4615 | { |
| 4616 | g_b_init_get_process_working_set_size = 1; |
| 4617 | s_pfn_Get_Process_Working_Set_Size = (GetProcessWorkingSetSize_Proc) |
| 4618 | GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 4619 | "GetProcessWorkingSetSize"); |
| 4620 | } |
| 4621 | if (s_pfn_Get_Process_Working_Set_Size == NULL) |
| 4622 | { |
| 4623 | return FALSE; |
| 4624 | } |
| 4625 | return s_pfn_Get_Process_Working_Set_Size (h_proc, minrss, maxrss); |
| 4626 | } |
| 4627 | |
| 4628 | static BOOL WINAPI |
| 4629 | global_memory_status (MEMORYSTATUS *buf) |
| 4630 | { |
| 4631 | static GlobalMemoryStatus_Proc s_pfn_Global_Memory_Status = NULL; |
| 4632 | |
| 4633 | if (is_windows_9x () == TRUE) |
| 4634 | { |
| 4635 | return FALSE; |
| 4636 | } |
| 4637 | if (g_b_init_global_memory_status == 0) |
| 4638 | { |
| 4639 | g_b_init_global_memory_status = 1; |
| 4640 | s_pfn_Global_Memory_Status = (GlobalMemoryStatus_Proc) |
| 4641 | GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 4642 | "GlobalMemoryStatus"); |
| 4643 | } |
| 4644 | if (s_pfn_Global_Memory_Status == NULL) |
| 4645 | { |
| 4646 | return FALSE; |
| 4647 | } |
| 4648 | return s_pfn_Global_Memory_Status (buf); |
| 4649 | } |
| 4650 | |
| 4651 | static BOOL WINAPI |
| 4652 | global_memory_status_ex (MEMORY_STATUS_EX *buf) |
| 4653 | { |
| 4654 | static GlobalMemoryStatusEx_Proc s_pfn_Global_Memory_Status_Ex = NULL; |
| 4655 | |
| 4656 | if (is_windows_9x () == TRUE) |
| 4657 | { |
| 4658 | return FALSE; |
| 4659 | } |
| 4660 | if (g_b_init_global_memory_status_ex == 0) |
| 4661 | { |
| 4662 | g_b_init_global_memory_status_ex = 1; |
| 4663 | s_pfn_Global_Memory_Status_Ex = (GlobalMemoryStatusEx_Proc) |
| 4664 | GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 4665 | "GlobalMemoryStatusEx"); |
| 4666 | } |
| 4667 | if (s_pfn_Global_Memory_Status_Ex == NULL) |
| 4668 | { |
| 4669 | return FALSE; |
| 4670 | } |
| 4671 | return s_pfn_Global_Memory_Status_Ex (buf); |
| 4672 | } |
| 4673 | |
| 4674 | Lisp_Object |
| 4675 | list_system_processes (void) |
| 4676 | { |
| 4677 | struct gcpro gcpro1; |
| 4678 | Lisp_Object proclist = Qnil; |
| 4679 | HANDLE h_snapshot; |
| 4680 | |
| 4681 | h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0); |
| 4682 | |
| 4683 | if (h_snapshot != INVALID_HANDLE_VALUE) |
| 4684 | { |
| 4685 | PROCESSENTRY32 proc_entry; |
| 4686 | DWORD proc_id; |
| 4687 | BOOL res; |
| 4688 | |
| 4689 | GCPRO1 (proclist); |
| 4690 | |
| 4691 | proc_entry.dwSize = sizeof (PROCESSENTRY32); |
| 4692 | for (res = process32_first (h_snapshot, &proc_entry); res; |
| 4693 | res = process32_next (h_snapshot, &proc_entry)) |
| 4694 | { |
| 4695 | proc_id = proc_entry.th32ProcessID; |
| 4696 | proclist = Fcons (make_fixnum_or_float (proc_id), proclist); |
| 4697 | } |
| 4698 | |
| 4699 | CloseHandle (h_snapshot); |
| 4700 | UNGCPRO; |
| 4701 | proclist = Fnreverse (proclist); |
| 4702 | } |
| 4703 | |
| 4704 | return proclist; |
| 4705 | } |
| 4706 | |
| 4707 | static int |
| 4708 | enable_privilege (LPCTSTR priv_name, BOOL enable_p, TOKEN_PRIVILEGES *old_priv) |
| 4709 | { |
| 4710 | TOKEN_PRIVILEGES priv; |
| 4711 | DWORD priv_size = sizeof (priv); |
| 4712 | DWORD opriv_size = sizeof (*old_priv); |
| 4713 | HANDLE h_token = NULL; |
| 4714 | HANDLE h_thread = GetCurrentThread (); |
| 4715 | int ret_val = 0; |
| 4716 | BOOL res; |
| 4717 | |
| 4718 | res = open_thread_token (h_thread, |
| 4719 | TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES, |
| 4720 | FALSE, &h_token); |
| 4721 | if (!res && GetLastError () == ERROR_NO_TOKEN) |
| 4722 | { |
| 4723 | if (impersonate_self (SecurityImpersonation)) |
| 4724 | res = open_thread_token (h_thread, |
| 4725 | TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES, |
| 4726 | FALSE, &h_token); |
| 4727 | } |
| 4728 | if (res) |
| 4729 | { |
| 4730 | priv.PrivilegeCount = 1; |
| 4731 | priv.Privileges[0].Attributes = enable_p ? SE_PRIVILEGE_ENABLED : 0; |
| 4732 | LookupPrivilegeValue (NULL, priv_name, &priv.Privileges[0].Luid); |
| 4733 | if (AdjustTokenPrivileges (h_token, FALSE, &priv, priv_size, |
| 4734 | old_priv, &opriv_size) |
| 4735 | && GetLastError () != ERROR_NOT_ALL_ASSIGNED) |
| 4736 | ret_val = 1; |
| 4737 | } |
| 4738 | if (h_token) |
| 4739 | CloseHandle (h_token); |
| 4740 | |
| 4741 | return ret_val; |
| 4742 | } |
| 4743 | |
| 4744 | static int |
| 4745 | restore_privilege (TOKEN_PRIVILEGES *priv) |
| 4746 | { |
| 4747 | DWORD priv_size = sizeof (*priv); |
| 4748 | HANDLE h_token = NULL; |
| 4749 | int ret_val = 0; |
| 4750 | |
| 4751 | if (open_thread_token (GetCurrentThread (), |
| 4752 | TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES, |
| 4753 | FALSE, &h_token)) |
| 4754 | { |
| 4755 | if (AdjustTokenPrivileges (h_token, FALSE, priv, priv_size, NULL, NULL) |
| 4756 | && GetLastError () != ERROR_NOT_ALL_ASSIGNED) |
| 4757 | ret_val = 1; |
| 4758 | } |
| 4759 | if (h_token) |
| 4760 | CloseHandle (h_token); |
| 4761 | |
| 4762 | return ret_val; |
| 4763 | } |
| 4764 | |
| 4765 | static Lisp_Object |
| 4766 | ltime (ULONGLONG time_100ns) |
| 4767 | { |
| 4768 | ULONGLONG time_sec = time_100ns / 10000000; |
| 4769 | int subsec = time_100ns % 10000000; |
| 4770 | return list4 (make_number (time_sec >> 16), |
| 4771 | make_number (time_sec & 0xffff), |
| 4772 | make_number (subsec / 10), |
| 4773 | make_number (subsec % 10 * 100000)); |
| 4774 | } |
| 4775 | |
| 4776 | #define U64_TO_LISP_TIME(time) ltime (time) |
| 4777 | |
| 4778 | static int |
| 4779 | process_times (HANDLE h_proc, Lisp_Object *ctime, Lisp_Object *etime, |
| 4780 | Lisp_Object *stime, Lisp_Object *utime, Lisp_Object *ttime, |
| 4781 | double *pcpu) |
| 4782 | { |
| 4783 | FILETIME ft_creation, ft_exit, ft_kernel, ft_user, ft_current; |
| 4784 | ULONGLONG tem1, tem2, tem3, tem; |
| 4785 | |
| 4786 | if (!h_proc |
| 4787 | || !get_process_times_fn |
| 4788 | || !(*get_process_times_fn) (h_proc, &ft_creation, &ft_exit, |
| 4789 | &ft_kernel, &ft_user)) |
| 4790 | return 0; |
| 4791 | |
| 4792 | GetSystemTimeAsFileTime (&ft_current); |
| 4793 | |
| 4794 | FILETIME_TO_U64 (tem1, ft_kernel); |
| 4795 | *stime = U64_TO_LISP_TIME (tem1); |
| 4796 | |
| 4797 | FILETIME_TO_U64 (tem2, ft_user); |
| 4798 | *utime = U64_TO_LISP_TIME (tem2); |
| 4799 | |
| 4800 | tem3 = tem1 + tem2; |
| 4801 | *ttime = U64_TO_LISP_TIME (tem3); |
| 4802 | |
| 4803 | FILETIME_TO_U64 (tem, ft_creation); |
| 4804 | /* Process no 4 (System) returns zero creation time. */ |
| 4805 | if (tem) |
| 4806 | tem -= utc_base; |
| 4807 | *ctime = U64_TO_LISP_TIME (tem); |
| 4808 | |
| 4809 | if (tem) |
| 4810 | { |
| 4811 | FILETIME_TO_U64 (tem3, ft_current); |
| 4812 | tem = (tem3 - utc_base) - tem; |
| 4813 | } |
| 4814 | *etime = U64_TO_LISP_TIME (tem); |
| 4815 | |
| 4816 | if (tem) |
| 4817 | { |
| 4818 | *pcpu = 100.0 * (tem1 + tem2) / tem; |
| 4819 | if (*pcpu > 100) |
| 4820 | *pcpu = 100.0; |
| 4821 | } |
| 4822 | else |
| 4823 | *pcpu = 0; |
| 4824 | |
| 4825 | return 1; |
| 4826 | } |
| 4827 | |
| 4828 | Lisp_Object |
| 4829 | system_process_attributes (Lisp_Object pid) |
| 4830 | { |
| 4831 | struct gcpro gcpro1, gcpro2, gcpro3; |
| 4832 | Lisp_Object attrs = Qnil; |
| 4833 | Lisp_Object cmd_str, decoded_cmd, tem; |
| 4834 | HANDLE h_snapshot, h_proc; |
| 4835 | DWORD proc_id; |
| 4836 | int found_proc = 0; |
| 4837 | char uname[UNLEN+1], gname[GNLEN+1], domain[1025]; |
| 4838 | DWORD ulength = sizeof (uname), dlength = sizeof (domain), needed; |
| 4839 | DWORD glength = sizeof (gname); |
| 4840 | HANDLE token = NULL; |
| 4841 | SID_NAME_USE user_type; |
| 4842 | unsigned char *buf = NULL; |
| 4843 | DWORD blen = 0; |
| 4844 | TOKEN_USER user_token; |
| 4845 | TOKEN_PRIMARY_GROUP group_token; |
| 4846 | unsigned euid; |
| 4847 | unsigned egid; |
| 4848 | PROCESS_MEMORY_COUNTERS mem; |
| 4849 | PROCESS_MEMORY_COUNTERS_EX mem_ex; |
| 4850 | DWORD minrss, maxrss; |
| 4851 | MEMORYSTATUS memst; |
| 4852 | MEMORY_STATUS_EX memstex; |
| 4853 | double totphys = 0.0; |
| 4854 | Lisp_Object ctime, stime, utime, etime, ttime; |
| 4855 | double pcpu; |
| 4856 | BOOL result = FALSE; |
| 4857 | |
| 4858 | CHECK_NUMBER_OR_FLOAT (pid); |
| 4859 | proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid); |
| 4860 | |
| 4861 | h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0); |
| 4862 | |
| 4863 | GCPRO3 (attrs, decoded_cmd, tem); |
| 4864 | |
| 4865 | if (h_snapshot != INVALID_HANDLE_VALUE) |
| 4866 | { |
| 4867 | PROCESSENTRY32 pe; |
| 4868 | BOOL res; |
| 4869 | |
| 4870 | pe.dwSize = sizeof (PROCESSENTRY32); |
| 4871 | for (res = process32_first (h_snapshot, &pe); res; |
| 4872 | res = process32_next (h_snapshot, &pe)) |
| 4873 | { |
| 4874 | if (proc_id == pe.th32ProcessID) |
| 4875 | { |
| 4876 | if (proc_id == 0) |
| 4877 | decoded_cmd = build_string ("Idle"); |
| 4878 | else |
| 4879 | { |
| 4880 | /* Decode the command name from locale-specific |
| 4881 | encoding. */ |
| 4882 | cmd_str = make_unibyte_string (pe.szExeFile, |
| 4883 | strlen (pe.szExeFile)); |
| 4884 | decoded_cmd = |
| 4885 | code_convert_string_norecord (cmd_str, |
| 4886 | Vlocale_coding_system, 0); |
| 4887 | } |
| 4888 | attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs); |
| 4889 | attrs = Fcons (Fcons (Qppid, |
| 4890 | make_fixnum_or_float (pe.th32ParentProcessID)), |
| 4891 | attrs); |
| 4892 | attrs = Fcons (Fcons (Qpri, make_number (pe.pcPriClassBase)), |
| 4893 | attrs); |
| 4894 | attrs = Fcons (Fcons (Qthcount, |
| 4895 | make_fixnum_or_float (pe.cntThreads)), |
| 4896 | attrs); |
| 4897 | found_proc = 1; |
| 4898 | break; |
| 4899 | } |
| 4900 | } |
| 4901 | |
| 4902 | CloseHandle (h_snapshot); |
| 4903 | } |
| 4904 | |
| 4905 | if (!found_proc) |
| 4906 | { |
| 4907 | UNGCPRO; |
| 4908 | return Qnil; |
| 4909 | } |
| 4910 | |
| 4911 | h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, |
| 4912 | FALSE, proc_id); |
| 4913 | /* If we were denied a handle to the process, try again after |
| 4914 | enabling the SeDebugPrivilege in our process. */ |
| 4915 | if (!h_proc) |
| 4916 | { |
| 4917 | TOKEN_PRIVILEGES priv_current; |
| 4918 | |
| 4919 | if (enable_privilege (SE_DEBUG_NAME, TRUE, &priv_current)) |
| 4920 | { |
| 4921 | h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, |
| 4922 | FALSE, proc_id); |
| 4923 | restore_privilege (&priv_current); |
| 4924 | revert_to_self (); |
| 4925 | } |
| 4926 | } |
| 4927 | if (h_proc) |
| 4928 | { |
| 4929 | result = open_process_token (h_proc, TOKEN_QUERY, &token); |
| 4930 | if (result) |
| 4931 | { |
| 4932 | result = get_token_information (token, TokenUser, NULL, 0, &blen); |
| 4933 | if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER) |
| 4934 | { |
| 4935 | buf = xmalloc (blen); |
| 4936 | result = get_token_information (token, TokenUser, |
| 4937 | (LPVOID)buf, blen, &needed); |
| 4938 | if (result) |
| 4939 | { |
| 4940 | memcpy (&user_token, buf, sizeof (user_token)); |
| 4941 | if (!w32_cached_id (user_token.User.Sid, &euid, uname)) |
| 4942 | { |
| 4943 | euid = get_rid (user_token.User.Sid); |
| 4944 | result = lookup_account_sid (NULL, user_token.User.Sid, |
| 4945 | uname, &ulength, |
| 4946 | domain, &dlength, |
| 4947 | &user_type); |
| 4948 | if (result) |
| 4949 | w32_add_to_cache (user_token.User.Sid, euid, uname); |
| 4950 | else |
| 4951 | { |
| 4952 | strcpy (uname, "unknown"); |
| 4953 | result = TRUE; |
| 4954 | } |
| 4955 | } |
| 4956 | ulength = strlen (uname); |
| 4957 | } |
| 4958 | } |
| 4959 | } |
| 4960 | if (result) |
| 4961 | { |
| 4962 | /* Determine a reasonable euid and gid values. */ |
| 4963 | if (xstrcasecmp ("administrator", uname) == 0) |
| 4964 | { |
| 4965 | euid = 500; /* well-known Administrator uid */ |
| 4966 | egid = 513; /* well-known None gid */ |
| 4967 | } |
| 4968 | else |
| 4969 | { |
| 4970 | /* Get group id and name. */ |
| 4971 | result = get_token_information (token, TokenPrimaryGroup, |
| 4972 | (LPVOID)buf, blen, &needed); |
| 4973 | if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER) |
| 4974 | { |
| 4975 | buf = xrealloc (buf, blen = needed); |
| 4976 | result = get_token_information (token, TokenPrimaryGroup, |
| 4977 | (LPVOID)buf, blen, &needed); |
| 4978 | } |
| 4979 | if (result) |
| 4980 | { |
| 4981 | memcpy (&group_token, buf, sizeof (group_token)); |
| 4982 | if (!w32_cached_id (group_token.PrimaryGroup, &egid, gname)) |
| 4983 | { |
| 4984 | egid = get_rid (group_token.PrimaryGroup); |
| 4985 | dlength = sizeof (domain); |
| 4986 | result = |
| 4987 | lookup_account_sid (NULL, group_token.PrimaryGroup, |
| 4988 | gname, &glength, NULL, &dlength, |
| 4989 | &user_type); |
| 4990 | if (result) |
| 4991 | w32_add_to_cache (group_token.PrimaryGroup, |
| 4992 | egid, gname); |
| 4993 | else |
| 4994 | { |
| 4995 | strcpy (gname, "None"); |
| 4996 | result = TRUE; |
| 4997 | } |
| 4998 | } |
| 4999 | glength = strlen (gname); |
| 5000 | } |
| 5001 | } |
| 5002 | } |
| 5003 | xfree (buf); |
| 5004 | } |
| 5005 | if (!result) |
| 5006 | { |
| 5007 | if (!is_windows_9x ()) |
| 5008 | { |
| 5009 | /* We couldn't open the process token, presumably because of |
| 5010 | insufficient access rights. Assume this process is run |
| 5011 | by the system. */ |
| 5012 | strcpy (uname, "SYSTEM"); |
| 5013 | strcpy (gname, "None"); |
| 5014 | euid = 18; /* SYSTEM */ |
| 5015 | egid = 513; /* None */ |
| 5016 | glength = strlen (gname); |
| 5017 | ulength = strlen (uname); |
| 5018 | } |
| 5019 | /* If we are running under Windows 9X, where security calls are |
| 5020 | not supported, we assume all processes are run by the current |
| 5021 | user. */ |
| 5022 | else if (GetUserName (uname, &ulength)) |
| 5023 | { |
| 5024 | if (xstrcasecmp ("administrator", uname) == 0) |
| 5025 | euid = 0; |
| 5026 | else |
| 5027 | euid = 123; |
| 5028 | egid = euid; |
| 5029 | strcpy (gname, "None"); |
| 5030 | glength = strlen (gname); |
| 5031 | ulength = strlen (uname); |
| 5032 | } |
| 5033 | else |
| 5034 | { |
| 5035 | euid = 123; |
| 5036 | egid = 123; |
| 5037 | strcpy (uname, "administrator"); |
| 5038 | ulength = strlen (uname); |
| 5039 | strcpy (gname, "None"); |
| 5040 | glength = strlen (gname); |
| 5041 | } |
| 5042 | if (token) |
| 5043 | CloseHandle (token); |
| 5044 | } |
| 5045 | |
| 5046 | attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (euid)), attrs); |
| 5047 | tem = make_unibyte_string (uname, ulength); |
| 5048 | attrs = Fcons (Fcons (Quser, |
| 5049 | code_convert_string_norecord (tem, Vlocale_coding_system, 0)), |
| 5050 | attrs); |
| 5051 | attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (egid)), attrs); |
| 5052 | tem = make_unibyte_string (gname, glength); |
| 5053 | attrs = Fcons (Fcons (Qgroup, |
| 5054 | code_convert_string_norecord (tem, Vlocale_coding_system, 0)), |
| 5055 | attrs); |
| 5056 | |
| 5057 | if (global_memory_status_ex (&memstex)) |
| 5058 | #if __GNUC__ || (defined (_MSC_VER) && _MSC_VER >= 1300) |
| 5059 | totphys = memstex.ullTotalPhys / 1024.0; |
| 5060 | #else |
| 5061 | /* Visual Studio 6 cannot convert an unsigned __int64 type to |
| 5062 | double, so we need to do this for it... */ |
| 5063 | { |
| 5064 | DWORD tot_hi = memstex.ullTotalPhys >> 32; |
| 5065 | DWORD tot_md = (memstex.ullTotalPhys & 0x00000000ffffffff) >> 10; |
| 5066 | DWORD tot_lo = memstex.ullTotalPhys % 1024; |
| 5067 | |
| 5068 | totphys = tot_hi * 4194304.0 + tot_md + tot_lo / 1024.0; |
| 5069 | } |
| 5070 | #endif /* __GNUC__ || _MSC_VER >= 1300 */ |
| 5071 | else if (global_memory_status (&memst)) |
| 5072 | totphys = memst.dwTotalPhys / 1024.0; |
| 5073 | |
| 5074 | if (h_proc |
| 5075 | && get_process_memory_info (h_proc, (PROCESS_MEMORY_COUNTERS *)&mem_ex, |
| 5076 | sizeof (mem_ex))) |
| 5077 | { |
| 5078 | DWORD rss = mem_ex.WorkingSetSize / 1024; |
| 5079 | |
| 5080 | attrs = Fcons (Fcons (Qmajflt, |
| 5081 | make_fixnum_or_float (mem_ex.PageFaultCount)), |
| 5082 | attrs); |
| 5083 | attrs = Fcons (Fcons (Qvsize, |
| 5084 | make_fixnum_or_float (mem_ex.PrivateUsage / 1024)), |
| 5085 | attrs); |
| 5086 | attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs); |
| 5087 | if (totphys) |
| 5088 | attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs); |
| 5089 | } |
| 5090 | else if (h_proc |
| 5091 | && get_process_memory_info (h_proc, &mem, sizeof (mem))) |
| 5092 | { |
| 5093 | DWORD rss = mem_ex.WorkingSetSize / 1024; |
| 5094 | |
| 5095 | attrs = Fcons (Fcons (Qmajflt, |
| 5096 | make_fixnum_or_float (mem.PageFaultCount)), |
| 5097 | attrs); |
| 5098 | attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs); |
| 5099 | if (totphys) |
| 5100 | attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs); |
| 5101 | } |
| 5102 | else if (h_proc |
| 5103 | && get_process_working_set_size (h_proc, &minrss, &maxrss)) |
| 5104 | { |
| 5105 | DWORD rss = maxrss / 1024; |
| 5106 | |
| 5107 | attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (maxrss / 1024)), attrs); |
| 5108 | if (totphys) |
| 5109 | attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs); |
| 5110 | } |
| 5111 | |
| 5112 | if (process_times (h_proc, &ctime, &etime, &stime, &utime, &ttime, &pcpu)) |
| 5113 | { |
| 5114 | attrs = Fcons (Fcons (Qutime, utime), attrs); |
| 5115 | attrs = Fcons (Fcons (Qstime, stime), attrs); |
| 5116 | attrs = Fcons (Fcons (Qtime, ttime), attrs); |
| 5117 | attrs = Fcons (Fcons (Qstart, ctime), attrs); |
| 5118 | attrs = Fcons (Fcons (Qetime, etime), attrs); |
| 5119 | attrs = Fcons (Fcons (Qpcpu, make_float (pcpu)), attrs); |
| 5120 | } |
| 5121 | |
| 5122 | /* FIXME: Retrieve command line by walking the PEB of the process. */ |
| 5123 | |
| 5124 | if (h_proc) |
| 5125 | CloseHandle (h_proc); |
| 5126 | UNGCPRO; |
| 5127 | return attrs; |
| 5128 | } |
| 5129 | |
| 5130 | \f |
| 5131 | /* Wrappers for winsock functions to map between our file descriptors |
| 5132 | and winsock's handles; also set h_errno for convenience. |
| 5133 | |
| 5134 | To allow Emacs to run on systems which don't have winsock support |
| 5135 | installed, we dynamically link to winsock on startup if present, and |
| 5136 | otherwise provide the minimum necessary functionality |
| 5137 | (eg. gethostname). */ |
| 5138 | |
| 5139 | /* function pointers for relevant socket functions */ |
| 5140 | int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData); |
| 5141 | void (PASCAL *pfn_WSASetLastError) (int iError); |
| 5142 | int (PASCAL *pfn_WSAGetLastError) (void); |
| 5143 | int (PASCAL *pfn_WSAEventSelect) (SOCKET s, HANDLE hEventObject, long lNetworkEvents); |
| 5144 | HANDLE (PASCAL *pfn_WSACreateEvent) (void); |
| 5145 | int (PASCAL *pfn_WSACloseEvent) (HANDLE hEvent); |
| 5146 | int (PASCAL *pfn_socket) (int af, int type, int protocol); |
| 5147 | int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen); |
| 5148 | int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen); |
| 5149 | int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp); |
| 5150 | int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags); |
| 5151 | int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags); |
| 5152 | int (PASCAL *pfn_closesocket) (SOCKET s); |
| 5153 | int (PASCAL *pfn_shutdown) (SOCKET s, int how); |
| 5154 | int (PASCAL *pfn_WSACleanup) (void); |
| 5155 | |
| 5156 | u_short (PASCAL *pfn_htons) (u_short hostshort); |
| 5157 | u_short (PASCAL *pfn_ntohs) (u_short netshort); |
| 5158 | unsigned long (PASCAL *pfn_inet_addr) (const char * cp); |
| 5159 | int (PASCAL *pfn_gethostname) (char * name, int namelen); |
| 5160 | struct hostent * (PASCAL *pfn_gethostbyname) (const char * name); |
| 5161 | struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto); |
| 5162 | int (PASCAL *pfn_getpeername) (SOCKET s, struct sockaddr *addr, int * namelen); |
| 5163 | int (PASCAL *pfn_setsockopt) (SOCKET s, int level, int optname, |
| 5164 | const char * optval, int optlen); |
| 5165 | int (PASCAL *pfn_listen) (SOCKET s, int backlog); |
| 5166 | int (PASCAL *pfn_getsockname) (SOCKET s, struct sockaddr * name, |
| 5167 | int * namelen); |
| 5168 | SOCKET (PASCAL *pfn_accept) (SOCKET s, struct sockaddr * addr, int * addrlen); |
| 5169 | int (PASCAL *pfn_recvfrom) (SOCKET s, char * buf, int len, int flags, |
| 5170 | struct sockaddr * from, int * fromlen); |
| 5171 | int (PASCAL *pfn_sendto) (SOCKET s, const char * buf, int len, int flags, |
| 5172 | const struct sockaddr * to, int tolen); |
| 5173 | |
| 5174 | /* SetHandleInformation is only needed to make sockets non-inheritable. */ |
| 5175 | BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags); |
| 5176 | #ifndef HANDLE_FLAG_INHERIT |
| 5177 | #define HANDLE_FLAG_INHERIT 1 |
| 5178 | #endif |
| 5179 | |
| 5180 | HANDLE winsock_lib; |
| 5181 | static int winsock_inuse; |
| 5182 | |
| 5183 | BOOL |
| 5184 | term_winsock (void) |
| 5185 | { |
| 5186 | if (winsock_lib != NULL && winsock_inuse == 0) |
| 5187 | { |
| 5188 | /* Not sure what would cause WSAENETDOWN, or even if it can happen |
| 5189 | after WSAStartup returns successfully, but it seems reasonable |
| 5190 | to allow unloading winsock anyway in that case. */ |
| 5191 | if (pfn_WSACleanup () == 0 || |
| 5192 | pfn_WSAGetLastError () == WSAENETDOWN) |
| 5193 | { |
| 5194 | if (FreeLibrary (winsock_lib)) |
| 5195 | winsock_lib = NULL; |
| 5196 | return TRUE; |
| 5197 | } |
| 5198 | } |
| 5199 | return FALSE; |
| 5200 | } |
| 5201 | |
| 5202 | BOOL |
| 5203 | init_winsock (int load_now) |
| 5204 | { |
| 5205 | WSADATA winsockData; |
| 5206 | |
| 5207 | if (winsock_lib != NULL) |
| 5208 | return TRUE; |
| 5209 | |
| 5210 | pfn_SetHandleInformation |
| 5211 | = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 5212 | "SetHandleInformation"); |
| 5213 | |
| 5214 | winsock_lib = LoadLibrary ("Ws2_32.dll"); |
| 5215 | |
| 5216 | if (winsock_lib != NULL) |
| 5217 | { |
| 5218 | /* dynamically link to socket functions */ |
| 5219 | |
| 5220 | #define LOAD_PROC(fn) \ |
| 5221 | if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \ |
| 5222 | goto fail; |
| 5223 | |
| 5224 | LOAD_PROC (WSAStartup); |
| 5225 | LOAD_PROC (WSASetLastError); |
| 5226 | LOAD_PROC (WSAGetLastError); |
| 5227 | LOAD_PROC (WSAEventSelect); |
| 5228 | LOAD_PROC (WSACreateEvent); |
| 5229 | LOAD_PROC (WSACloseEvent); |
| 5230 | LOAD_PROC (socket); |
| 5231 | LOAD_PROC (bind); |
| 5232 | LOAD_PROC (connect); |
| 5233 | LOAD_PROC (ioctlsocket); |
| 5234 | LOAD_PROC (recv); |
| 5235 | LOAD_PROC (send); |
| 5236 | LOAD_PROC (closesocket); |
| 5237 | LOAD_PROC (shutdown); |
| 5238 | LOAD_PROC (htons); |
| 5239 | LOAD_PROC (ntohs); |
| 5240 | LOAD_PROC (inet_addr); |
| 5241 | LOAD_PROC (gethostname); |
| 5242 | LOAD_PROC (gethostbyname); |
| 5243 | LOAD_PROC (getservbyname); |
| 5244 | LOAD_PROC (getpeername); |
| 5245 | LOAD_PROC (WSACleanup); |
| 5246 | LOAD_PROC (setsockopt); |
| 5247 | LOAD_PROC (listen); |
| 5248 | LOAD_PROC (getsockname); |
| 5249 | LOAD_PROC (accept); |
| 5250 | LOAD_PROC (recvfrom); |
| 5251 | LOAD_PROC (sendto); |
| 5252 | #undef LOAD_PROC |
| 5253 | |
| 5254 | /* specify version 1.1 of winsock */ |
| 5255 | if (pfn_WSAStartup (0x101, &winsockData) == 0) |
| 5256 | { |
| 5257 | if (winsockData.wVersion != 0x101) |
| 5258 | goto fail; |
| 5259 | |
| 5260 | if (!load_now) |
| 5261 | { |
| 5262 | /* Report that winsock exists and is usable, but leave |
| 5263 | socket functions disabled. I am assuming that calling |
| 5264 | WSAStartup does not require any network interaction, |
| 5265 | and in particular does not cause or require a dial-up |
| 5266 | connection to be established. */ |
| 5267 | |
| 5268 | pfn_WSACleanup (); |
| 5269 | FreeLibrary (winsock_lib); |
| 5270 | winsock_lib = NULL; |
| 5271 | } |
| 5272 | winsock_inuse = 0; |
| 5273 | return TRUE; |
| 5274 | } |
| 5275 | |
| 5276 | fail: |
| 5277 | FreeLibrary (winsock_lib); |
| 5278 | winsock_lib = NULL; |
| 5279 | } |
| 5280 | |
| 5281 | return FALSE; |
| 5282 | } |
| 5283 | |
| 5284 | |
| 5285 | int h_errno = 0; |
| 5286 | |
| 5287 | /* function to set h_errno for compatibility; map winsock error codes to |
| 5288 | normal system codes where they overlap (non-overlapping definitions |
| 5289 | are already in <sys/socket.h> */ |
| 5290 | static void |
| 5291 | set_errno (void) |
| 5292 | { |
| 5293 | if (winsock_lib == NULL) |
| 5294 | h_errno = EINVAL; |
| 5295 | else |
| 5296 | h_errno = pfn_WSAGetLastError (); |
| 5297 | |
| 5298 | switch (h_errno) |
| 5299 | { |
| 5300 | case WSAEACCES: h_errno = EACCES; break; |
| 5301 | case WSAEBADF: h_errno = EBADF; break; |
| 5302 | case WSAEFAULT: h_errno = EFAULT; break; |
| 5303 | case WSAEINTR: h_errno = EINTR; break; |
| 5304 | case WSAEINVAL: h_errno = EINVAL; break; |
| 5305 | case WSAEMFILE: h_errno = EMFILE; break; |
| 5306 | case WSAENAMETOOLONG: h_errno = ENAMETOOLONG; break; |
| 5307 | case WSAENOTEMPTY: h_errno = ENOTEMPTY; break; |
| 5308 | } |
| 5309 | errno = h_errno; |
| 5310 | } |
| 5311 | |
| 5312 | static void |
| 5313 | check_errno (void) |
| 5314 | { |
| 5315 | if (h_errno == 0 && winsock_lib != NULL) |
| 5316 | pfn_WSASetLastError (0); |
| 5317 | } |
| 5318 | |
| 5319 | /* Extend strerror to handle the winsock-specific error codes. */ |
| 5320 | struct { |
| 5321 | int errnum; |
| 5322 | char * msg; |
| 5323 | } _wsa_errlist[] = { |
| 5324 | {WSAEINTR , "Interrupted function call"}, |
| 5325 | {WSAEBADF , "Bad file descriptor"}, |
| 5326 | {WSAEACCES , "Permission denied"}, |
| 5327 | {WSAEFAULT , "Bad address"}, |
| 5328 | {WSAEINVAL , "Invalid argument"}, |
| 5329 | {WSAEMFILE , "Too many open files"}, |
| 5330 | |
| 5331 | {WSAEWOULDBLOCK , "Resource temporarily unavailable"}, |
| 5332 | {WSAEINPROGRESS , "Operation now in progress"}, |
| 5333 | {WSAEALREADY , "Operation already in progress"}, |
| 5334 | {WSAENOTSOCK , "Socket operation on non-socket"}, |
| 5335 | {WSAEDESTADDRREQ , "Destination address required"}, |
| 5336 | {WSAEMSGSIZE , "Message too long"}, |
| 5337 | {WSAEPROTOTYPE , "Protocol wrong type for socket"}, |
| 5338 | {WSAENOPROTOOPT , "Bad protocol option"}, |
| 5339 | {WSAEPROTONOSUPPORT , "Protocol not supported"}, |
| 5340 | {WSAESOCKTNOSUPPORT , "Socket type not supported"}, |
| 5341 | {WSAEOPNOTSUPP , "Operation not supported"}, |
| 5342 | {WSAEPFNOSUPPORT , "Protocol family not supported"}, |
| 5343 | {WSAEAFNOSUPPORT , "Address family not supported by protocol family"}, |
| 5344 | {WSAEADDRINUSE , "Address already in use"}, |
| 5345 | {WSAEADDRNOTAVAIL , "Cannot assign requested address"}, |
| 5346 | {WSAENETDOWN , "Network is down"}, |
| 5347 | {WSAENETUNREACH , "Network is unreachable"}, |
| 5348 | {WSAENETRESET , "Network dropped connection on reset"}, |
| 5349 | {WSAECONNABORTED , "Software caused connection abort"}, |
| 5350 | {WSAECONNRESET , "Connection reset by peer"}, |
| 5351 | {WSAENOBUFS , "No buffer space available"}, |
| 5352 | {WSAEISCONN , "Socket is already connected"}, |
| 5353 | {WSAENOTCONN , "Socket is not connected"}, |
| 5354 | {WSAESHUTDOWN , "Cannot send after socket shutdown"}, |
| 5355 | {WSAETOOMANYREFS , "Too many references"}, /* not sure */ |
| 5356 | {WSAETIMEDOUT , "Connection timed out"}, |
| 5357 | {WSAECONNREFUSED , "Connection refused"}, |
| 5358 | {WSAELOOP , "Network loop"}, /* not sure */ |
| 5359 | {WSAENAMETOOLONG , "Name is too long"}, |
| 5360 | {WSAEHOSTDOWN , "Host is down"}, |
| 5361 | {WSAEHOSTUNREACH , "No route to host"}, |
| 5362 | {WSAENOTEMPTY , "Buffer not empty"}, /* not sure */ |
| 5363 | {WSAEPROCLIM , "Too many processes"}, |
| 5364 | {WSAEUSERS , "Too many users"}, /* not sure */ |
| 5365 | {WSAEDQUOT , "Double quote in host name"}, /* really not sure */ |
| 5366 | {WSAESTALE , "Data is stale"}, /* not sure */ |
| 5367 | {WSAEREMOTE , "Remote error"}, /* not sure */ |
| 5368 | |
| 5369 | {WSASYSNOTREADY , "Network subsystem is unavailable"}, |
| 5370 | {WSAVERNOTSUPPORTED , "WINSOCK.DLL version out of range"}, |
| 5371 | {WSANOTINITIALISED , "Winsock not initialized successfully"}, |
| 5372 | {WSAEDISCON , "Graceful shutdown in progress"}, |
| 5373 | #ifdef WSAENOMORE |
| 5374 | {WSAENOMORE , "No more operations allowed"}, /* not sure */ |
| 5375 | {WSAECANCELLED , "Operation cancelled"}, /* not sure */ |
| 5376 | {WSAEINVALIDPROCTABLE , "Invalid procedure table from service provider"}, |
| 5377 | {WSAEINVALIDPROVIDER , "Invalid service provider version number"}, |
| 5378 | {WSAEPROVIDERFAILEDINIT , "Unable to initialize a service provider"}, |
| 5379 | {WSASYSCALLFAILURE , "System call failure"}, |
| 5380 | {WSASERVICE_NOT_FOUND , "Service not found"}, /* not sure */ |
| 5381 | {WSATYPE_NOT_FOUND , "Class type not found"}, |
| 5382 | {WSA_E_NO_MORE , "No more resources available"}, /* really not sure */ |
| 5383 | {WSA_E_CANCELLED , "Operation already cancelled"}, /* really not sure */ |
| 5384 | {WSAEREFUSED , "Operation refused"}, /* not sure */ |
| 5385 | #endif |
| 5386 | |
| 5387 | {WSAHOST_NOT_FOUND , "Host not found"}, |
| 5388 | {WSATRY_AGAIN , "Authoritative host not found during name lookup"}, |
| 5389 | {WSANO_RECOVERY , "Non-recoverable error during name lookup"}, |
| 5390 | {WSANO_DATA , "Valid name, no data record of requested type"}, |
| 5391 | |
| 5392 | {-1, NULL} |
| 5393 | }; |
| 5394 | |
| 5395 | char * |
| 5396 | sys_strerror (int error_no) |
| 5397 | { |
| 5398 | int i; |
| 5399 | static char unknown_msg[40]; |
| 5400 | |
| 5401 | if (error_no >= 0 && error_no < sys_nerr) |
| 5402 | return sys_errlist[error_no]; |
| 5403 | |
| 5404 | for (i = 0; _wsa_errlist[i].errnum >= 0; i++) |
| 5405 | if (_wsa_errlist[i].errnum == error_no) |
| 5406 | return _wsa_errlist[i].msg; |
| 5407 | |
| 5408 | sprintf (unknown_msg, "Unidentified error: %d", error_no); |
| 5409 | return unknown_msg; |
| 5410 | } |
| 5411 | |
| 5412 | /* [andrewi 3-May-96] I've had conflicting results using both methods, |
| 5413 | but I believe the method of keeping the socket handle separate (and |
| 5414 | insuring it is not inheritable) is the correct one. */ |
| 5415 | |
| 5416 | #define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd) |
| 5417 | |
| 5418 | static int socket_to_fd (SOCKET s); |
| 5419 | |
| 5420 | int |
| 5421 | sys_socket (int af, int type, int protocol) |
| 5422 | { |
| 5423 | SOCKET s; |
| 5424 | |
| 5425 | if (winsock_lib == NULL) |
| 5426 | { |
| 5427 | h_errno = ENETDOWN; |
| 5428 | return INVALID_SOCKET; |
| 5429 | } |
| 5430 | |
| 5431 | check_errno (); |
| 5432 | |
| 5433 | /* call the real socket function */ |
| 5434 | s = pfn_socket (af, type, protocol); |
| 5435 | |
| 5436 | if (s != INVALID_SOCKET) |
| 5437 | return socket_to_fd (s); |
| 5438 | |
| 5439 | set_errno (); |
| 5440 | return -1; |
| 5441 | } |
| 5442 | |
| 5443 | /* Convert a SOCKET to a file descriptor. */ |
| 5444 | static int |
| 5445 | socket_to_fd (SOCKET s) |
| 5446 | { |
| 5447 | int fd; |
| 5448 | child_process * cp; |
| 5449 | |
| 5450 | /* Although under NT 3.5 _open_osfhandle will accept a socket |
| 5451 | handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT, |
| 5452 | that does not work under NT 3.1. However, we can get the same |
| 5453 | effect by using a backdoor function to replace an existing |
| 5454 | descriptor handle with the one we want. */ |
| 5455 | |
| 5456 | /* allocate a file descriptor (with appropriate flags) */ |
| 5457 | fd = _open ("NUL:", _O_RDWR); |
| 5458 | if (fd >= 0) |
| 5459 | { |
| 5460 | /* Make a non-inheritable copy of the socket handle. Note |
| 5461 | that it is possible that sockets aren't actually kernel |
| 5462 | handles, which appears to be the case on Windows 9x when |
| 5463 | the MS Proxy winsock client is installed. */ |
| 5464 | { |
| 5465 | /* Apparently there is a bug in NT 3.51 with some service |
| 5466 | packs, which prevents using DuplicateHandle to make a |
| 5467 | socket handle non-inheritable (causes WSACleanup to |
| 5468 | hang). The work-around is to use SetHandleInformation |
| 5469 | instead if it is available and implemented. */ |
| 5470 | if (pfn_SetHandleInformation) |
| 5471 | { |
| 5472 | pfn_SetHandleInformation ((HANDLE) s, HANDLE_FLAG_INHERIT, 0); |
| 5473 | } |
| 5474 | else |
| 5475 | { |
| 5476 | HANDLE parent = GetCurrentProcess (); |
| 5477 | HANDLE new_s = INVALID_HANDLE_VALUE; |
| 5478 | |
| 5479 | if (DuplicateHandle (parent, |
| 5480 | (HANDLE) s, |
| 5481 | parent, |
| 5482 | &new_s, |
| 5483 | 0, |
| 5484 | FALSE, |
| 5485 | DUPLICATE_SAME_ACCESS)) |
| 5486 | { |
| 5487 | /* It is possible that DuplicateHandle succeeds even |
| 5488 | though the socket wasn't really a kernel handle, |
| 5489 | because a real handle has the same value. So |
| 5490 | test whether the new handle really is a socket. */ |
| 5491 | long nonblocking = 0; |
| 5492 | if (pfn_ioctlsocket ((SOCKET) new_s, FIONBIO, &nonblocking) == 0) |
| 5493 | { |
| 5494 | pfn_closesocket (s); |
| 5495 | s = (SOCKET) new_s; |
| 5496 | } |
| 5497 | else |
| 5498 | { |
| 5499 | CloseHandle (new_s); |
| 5500 | } |
| 5501 | } |
| 5502 | } |
| 5503 | } |
| 5504 | fd_info[fd].hnd = (HANDLE) s; |
| 5505 | |
| 5506 | /* set our own internal flags */ |
| 5507 | fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE; |
| 5508 | |
| 5509 | cp = new_child (); |
| 5510 | if (cp) |
| 5511 | { |
| 5512 | cp->fd = fd; |
| 5513 | cp->status = STATUS_READ_ACKNOWLEDGED; |
| 5514 | |
| 5515 | /* attach child_process to fd_info */ |
| 5516 | if (fd_info[ fd ].cp != NULL) |
| 5517 | { |
| 5518 | DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd)); |
| 5519 | emacs_abort (); |
| 5520 | } |
| 5521 | |
| 5522 | fd_info[ fd ].cp = cp; |
| 5523 | |
| 5524 | /* success! */ |
| 5525 | winsock_inuse++; /* count open sockets */ |
| 5526 | return fd; |
| 5527 | } |
| 5528 | |
| 5529 | /* clean up */ |
| 5530 | _close (fd); |
| 5531 | } |
| 5532 | pfn_closesocket (s); |
| 5533 | h_errno = EMFILE; |
| 5534 | return -1; |
| 5535 | } |
| 5536 | |
| 5537 | int |
| 5538 | sys_bind (int s, const struct sockaddr * addr, int namelen) |
| 5539 | { |
| 5540 | if (winsock_lib == NULL) |
| 5541 | { |
| 5542 | h_errno = ENOTSOCK; |
| 5543 | return SOCKET_ERROR; |
| 5544 | } |
| 5545 | |
| 5546 | check_errno (); |
| 5547 | if (fd_info[s].flags & FILE_SOCKET) |
| 5548 | { |
| 5549 | int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen); |
| 5550 | if (rc == SOCKET_ERROR) |
| 5551 | set_errno (); |
| 5552 | return rc; |
| 5553 | } |
| 5554 | h_errno = ENOTSOCK; |
| 5555 | return SOCKET_ERROR; |
| 5556 | } |
| 5557 | |
| 5558 | int |
| 5559 | sys_connect (int s, const struct sockaddr * name, int namelen) |
| 5560 | { |
| 5561 | if (winsock_lib == NULL) |
| 5562 | { |
| 5563 | h_errno = ENOTSOCK; |
| 5564 | return SOCKET_ERROR; |
| 5565 | } |
| 5566 | |
| 5567 | check_errno (); |
| 5568 | if (fd_info[s].flags & FILE_SOCKET) |
| 5569 | { |
| 5570 | int rc = pfn_connect (SOCK_HANDLE (s), name, namelen); |
| 5571 | if (rc == SOCKET_ERROR) |
| 5572 | set_errno (); |
| 5573 | return rc; |
| 5574 | } |
| 5575 | h_errno = ENOTSOCK; |
| 5576 | return SOCKET_ERROR; |
| 5577 | } |
| 5578 | |
| 5579 | u_short |
| 5580 | sys_htons (u_short hostshort) |
| 5581 | { |
| 5582 | return (winsock_lib != NULL) ? |
| 5583 | pfn_htons (hostshort) : hostshort; |
| 5584 | } |
| 5585 | |
| 5586 | u_short |
| 5587 | sys_ntohs (u_short netshort) |
| 5588 | { |
| 5589 | return (winsock_lib != NULL) ? |
| 5590 | pfn_ntohs (netshort) : netshort; |
| 5591 | } |
| 5592 | |
| 5593 | unsigned long |
| 5594 | sys_inet_addr (const char * cp) |
| 5595 | { |
| 5596 | return (winsock_lib != NULL) ? |
| 5597 | pfn_inet_addr (cp) : INADDR_NONE; |
| 5598 | } |
| 5599 | |
| 5600 | int |
| 5601 | sys_gethostname (char * name, int namelen) |
| 5602 | { |
| 5603 | if (winsock_lib != NULL) |
| 5604 | return pfn_gethostname (name, namelen); |
| 5605 | |
| 5606 | if (namelen > MAX_COMPUTERNAME_LENGTH) |
| 5607 | return !GetComputerName (name, (DWORD *)&namelen); |
| 5608 | |
| 5609 | h_errno = EFAULT; |
| 5610 | return SOCKET_ERROR; |
| 5611 | } |
| 5612 | |
| 5613 | struct hostent * |
| 5614 | sys_gethostbyname (const char * name) |
| 5615 | { |
| 5616 | struct hostent * host; |
| 5617 | |
| 5618 | if (winsock_lib == NULL) |
| 5619 | { |
| 5620 | h_errno = ENETDOWN; |
| 5621 | return NULL; |
| 5622 | } |
| 5623 | |
| 5624 | check_errno (); |
| 5625 | host = pfn_gethostbyname (name); |
| 5626 | if (!host) |
| 5627 | set_errno (); |
| 5628 | return host; |
| 5629 | } |
| 5630 | |
| 5631 | struct servent * |
| 5632 | sys_getservbyname (const char * name, const char * proto) |
| 5633 | { |
| 5634 | struct servent * serv; |
| 5635 | |
| 5636 | if (winsock_lib == NULL) |
| 5637 | { |
| 5638 | h_errno = ENETDOWN; |
| 5639 | return NULL; |
| 5640 | } |
| 5641 | |
| 5642 | check_errno (); |
| 5643 | serv = pfn_getservbyname (name, proto); |
| 5644 | if (!serv) |
| 5645 | set_errno (); |
| 5646 | return serv; |
| 5647 | } |
| 5648 | |
| 5649 | int |
| 5650 | sys_getpeername (int s, struct sockaddr *addr, int * namelen) |
| 5651 | { |
| 5652 | if (winsock_lib == NULL) |
| 5653 | { |
| 5654 | h_errno = ENETDOWN; |
| 5655 | return SOCKET_ERROR; |
| 5656 | } |
| 5657 | |
| 5658 | check_errno (); |
| 5659 | if (fd_info[s].flags & FILE_SOCKET) |
| 5660 | { |
| 5661 | int rc = pfn_getpeername (SOCK_HANDLE (s), addr, namelen); |
| 5662 | if (rc == SOCKET_ERROR) |
| 5663 | set_errno (); |
| 5664 | return rc; |
| 5665 | } |
| 5666 | h_errno = ENOTSOCK; |
| 5667 | return SOCKET_ERROR; |
| 5668 | } |
| 5669 | |
| 5670 | int |
| 5671 | sys_shutdown (int s, int how) |
| 5672 | { |
| 5673 | if (winsock_lib == NULL) |
| 5674 | { |
| 5675 | h_errno = ENETDOWN; |
| 5676 | return SOCKET_ERROR; |
| 5677 | } |
| 5678 | |
| 5679 | check_errno (); |
| 5680 | if (fd_info[s].flags & FILE_SOCKET) |
| 5681 | { |
| 5682 | int rc = pfn_shutdown (SOCK_HANDLE (s), how); |
| 5683 | if (rc == SOCKET_ERROR) |
| 5684 | set_errno (); |
| 5685 | return rc; |
| 5686 | } |
| 5687 | h_errno = ENOTSOCK; |
| 5688 | return SOCKET_ERROR; |
| 5689 | } |
| 5690 | |
| 5691 | int |
| 5692 | sys_setsockopt (int s, int level, int optname, const void * optval, int optlen) |
| 5693 | { |
| 5694 | if (winsock_lib == NULL) |
| 5695 | { |
| 5696 | h_errno = ENETDOWN; |
| 5697 | return SOCKET_ERROR; |
| 5698 | } |
| 5699 | |
| 5700 | check_errno (); |
| 5701 | if (fd_info[s].flags & FILE_SOCKET) |
| 5702 | { |
| 5703 | int rc = pfn_setsockopt (SOCK_HANDLE (s), level, optname, |
| 5704 | (const char *)optval, optlen); |
| 5705 | if (rc == SOCKET_ERROR) |
| 5706 | set_errno (); |
| 5707 | return rc; |
| 5708 | } |
| 5709 | h_errno = ENOTSOCK; |
| 5710 | return SOCKET_ERROR; |
| 5711 | } |
| 5712 | |
| 5713 | int |
| 5714 | sys_listen (int s, int backlog) |
| 5715 | { |
| 5716 | if (winsock_lib == NULL) |
| 5717 | { |
| 5718 | h_errno = ENETDOWN; |
| 5719 | return SOCKET_ERROR; |
| 5720 | } |
| 5721 | |
| 5722 | check_errno (); |
| 5723 | if (fd_info[s].flags & FILE_SOCKET) |
| 5724 | { |
| 5725 | int rc = pfn_listen (SOCK_HANDLE (s), backlog); |
| 5726 | if (rc == SOCKET_ERROR) |
| 5727 | set_errno (); |
| 5728 | else |
| 5729 | fd_info[s].flags |= FILE_LISTEN; |
| 5730 | return rc; |
| 5731 | } |
| 5732 | h_errno = ENOTSOCK; |
| 5733 | return SOCKET_ERROR; |
| 5734 | } |
| 5735 | |
| 5736 | int |
| 5737 | sys_getsockname (int s, struct sockaddr * name, int * namelen) |
| 5738 | { |
| 5739 | if (winsock_lib == NULL) |
| 5740 | { |
| 5741 | h_errno = ENETDOWN; |
| 5742 | return SOCKET_ERROR; |
| 5743 | } |
| 5744 | |
| 5745 | check_errno (); |
| 5746 | if (fd_info[s].flags & FILE_SOCKET) |
| 5747 | { |
| 5748 | int rc = pfn_getsockname (SOCK_HANDLE (s), name, namelen); |
| 5749 | if (rc == SOCKET_ERROR) |
| 5750 | set_errno (); |
| 5751 | return rc; |
| 5752 | } |
| 5753 | h_errno = ENOTSOCK; |
| 5754 | return SOCKET_ERROR; |
| 5755 | } |
| 5756 | |
| 5757 | int |
| 5758 | sys_accept (int s, struct sockaddr * addr, int * addrlen) |
| 5759 | { |
| 5760 | if (winsock_lib == NULL) |
| 5761 | { |
| 5762 | h_errno = ENETDOWN; |
| 5763 | return -1; |
| 5764 | } |
| 5765 | |
| 5766 | check_errno (); |
| 5767 | if (fd_info[s].flags & FILE_LISTEN) |
| 5768 | { |
| 5769 | SOCKET t = pfn_accept (SOCK_HANDLE (s), addr, addrlen); |
| 5770 | int fd = -1; |
| 5771 | if (t == INVALID_SOCKET) |
| 5772 | set_errno (); |
| 5773 | else |
| 5774 | fd = socket_to_fd (t); |
| 5775 | |
| 5776 | fd_info[s].cp->status = STATUS_READ_ACKNOWLEDGED; |
| 5777 | ResetEvent (fd_info[s].cp->char_avail); |
| 5778 | return fd; |
| 5779 | } |
| 5780 | h_errno = ENOTSOCK; |
| 5781 | return -1; |
| 5782 | } |
| 5783 | |
| 5784 | int |
| 5785 | sys_recvfrom (int s, char * buf, int len, int flags, |
| 5786 | struct sockaddr * from, int * fromlen) |
| 5787 | { |
| 5788 | if (winsock_lib == NULL) |
| 5789 | { |
| 5790 | h_errno = ENETDOWN; |
| 5791 | return SOCKET_ERROR; |
| 5792 | } |
| 5793 | |
| 5794 | check_errno (); |
| 5795 | if (fd_info[s].flags & FILE_SOCKET) |
| 5796 | { |
| 5797 | int rc = pfn_recvfrom (SOCK_HANDLE (s), buf, len, flags, from, fromlen); |
| 5798 | if (rc == SOCKET_ERROR) |
| 5799 | set_errno (); |
| 5800 | return rc; |
| 5801 | } |
| 5802 | h_errno = ENOTSOCK; |
| 5803 | return SOCKET_ERROR; |
| 5804 | } |
| 5805 | |
| 5806 | int |
| 5807 | sys_sendto (int s, const char * buf, int len, int flags, |
| 5808 | const struct sockaddr * to, int tolen) |
| 5809 | { |
| 5810 | if (winsock_lib == NULL) |
| 5811 | { |
| 5812 | h_errno = ENETDOWN; |
| 5813 | return SOCKET_ERROR; |
| 5814 | } |
| 5815 | |
| 5816 | check_errno (); |
| 5817 | if (fd_info[s].flags & FILE_SOCKET) |
| 5818 | { |
| 5819 | int rc = pfn_sendto (SOCK_HANDLE (s), buf, len, flags, to, tolen); |
| 5820 | if (rc == SOCKET_ERROR) |
| 5821 | set_errno (); |
| 5822 | return rc; |
| 5823 | } |
| 5824 | h_errno = ENOTSOCK; |
| 5825 | return SOCKET_ERROR; |
| 5826 | } |
| 5827 | |
| 5828 | /* Windows does not have an fcntl function. Provide an implementation |
| 5829 | solely for making sockets non-blocking. */ |
| 5830 | int |
| 5831 | fcntl (int s, int cmd, int options) |
| 5832 | { |
| 5833 | if (winsock_lib == NULL) |
| 5834 | { |
| 5835 | h_errno = ENETDOWN; |
| 5836 | return -1; |
| 5837 | } |
| 5838 | |
| 5839 | check_errno (); |
| 5840 | if (fd_info[s].flags & FILE_SOCKET) |
| 5841 | { |
| 5842 | if (cmd == F_SETFL && options == O_NDELAY) |
| 5843 | { |
| 5844 | unsigned long nblock = 1; |
| 5845 | int rc = pfn_ioctlsocket (SOCK_HANDLE (s), FIONBIO, &nblock); |
| 5846 | if (rc == SOCKET_ERROR) |
| 5847 | set_errno (); |
| 5848 | /* Keep track of the fact that we set this to non-blocking. */ |
| 5849 | fd_info[s].flags |= FILE_NDELAY; |
| 5850 | return rc; |
| 5851 | } |
| 5852 | else |
| 5853 | { |
| 5854 | h_errno = EINVAL; |
| 5855 | return SOCKET_ERROR; |
| 5856 | } |
| 5857 | } |
| 5858 | h_errno = ENOTSOCK; |
| 5859 | return SOCKET_ERROR; |
| 5860 | } |
| 5861 | |
| 5862 | |
| 5863 | /* Shadow main io functions: we need to handle pipes and sockets more |
| 5864 | intelligently, and implement non-blocking mode as well. */ |
| 5865 | |
| 5866 | int |
| 5867 | sys_close (int fd) |
| 5868 | { |
| 5869 | int rc; |
| 5870 | |
| 5871 | if (fd < 0) |
| 5872 | { |
| 5873 | errno = EBADF; |
| 5874 | return -1; |
| 5875 | } |
| 5876 | |
| 5877 | if (fd < MAXDESC && fd_info[fd].cp) |
| 5878 | { |
| 5879 | child_process * cp = fd_info[fd].cp; |
| 5880 | |
| 5881 | fd_info[fd].cp = NULL; |
| 5882 | |
| 5883 | if (CHILD_ACTIVE (cp)) |
| 5884 | { |
| 5885 | /* if last descriptor to active child_process then cleanup */ |
| 5886 | int i; |
| 5887 | for (i = 0; i < MAXDESC; i++) |
| 5888 | { |
| 5889 | if (i == fd) |
| 5890 | continue; |
| 5891 | if (fd_info[i].cp == cp) |
| 5892 | break; |
| 5893 | } |
| 5894 | if (i == MAXDESC) |
| 5895 | { |
| 5896 | if (fd_info[fd].flags & FILE_SOCKET) |
| 5897 | { |
| 5898 | if (winsock_lib == NULL) emacs_abort (); |
| 5899 | |
| 5900 | pfn_shutdown (SOCK_HANDLE (fd), 2); |
| 5901 | rc = pfn_closesocket (SOCK_HANDLE (fd)); |
| 5902 | |
| 5903 | winsock_inuse--; /* count open sockets */ |
| 5904 | } |
| 5905 | delete_child (cp); |
| 5906 | } |
| 5907 | } |
| 5908 | } |
| 5909 | |
| 5910 | /* Note that sockets do not need special treatment here (at least on |
| 5911 | NT and Windows 95 using the standard tcp/ip stacks) - it appears that |
| 5912 | closesocket is equivalent to CloseHandle, which is to be expected |
| 5913 | because socket handles are fully fledged kernel handles. */ |
| 5914 | rc = _close (fd); |
| 5915 | |
| 5916 | if (rc == 0 && fd < MAXDESC) |
| 5917 | fd_info[fd].flags = 0; |
| 5918 | |
| 5919 | return rc; |
| 5920 | } |
| 5921 | |
| 5922 | int |
| 5923 | sys_dup (int fd) |
| 5924 | { |
| 5925 | int new_fd; |
| 5926 | |
| 5927 | new_fd = _dup (fd); |
| 5928 | if (new_fd >= 0 && new_fd < MAXDESC) |
| 5929 | { |
| 5930 | /* duplicate our internal info as well */ |
| 5931 | fd_info[new_fd] = fd_info[fd]; |
| 5932 | } |
| 5933 | return new_fd; |
| 5934 | } |
| 5935 | |
| 5936 | int |
| 5937 | sys_dup2 (int src, int dst) |
| 5938 | { |
| 5939 | int rc; |
| 5940 | |
| 5941 | if (dst < 0 || dst >= MAXDESC) |
| 5942 | { |
| 5943 | errno = EBADF; |
| 5944 | return -1; |
| 5945 | } |
| 5946 | |
| 5947 | /* make sure we close the destination first if it's a pipe or socket */ |
| 5948 | if (src != dst && fd_info[dst].flags != 0) |
| 5949 | sys_close (dst); |
| 5950 | |
| 5951 | rc = _dup2 (src, dst); |
| 5952 | if (rc == 0) |
| 5953 | { |
| 5954 | /* duplicate our internal info as well */ |
| 5955 | fd_info[dst] = fd_info[src]; |
| 5956 | } |
| 5957 | return rc; |
| 5958 | } |
| 5959 | |
| 5960 | /* Unix pipe() has only one arg */ |
| 5961 | int |
| 5962 | sys_pipe (int * phandles) |
| 5963 | { |
| 5964 | int rc; |
| 5965 | unsigned flags; |
| 5966 | |
| 5967 | /* make pipe handles non-inheritable; when we spawn a child, we |
| 5968 | replace the relevant handle with an inheritable one. Also put |
| 5969 | pipes into binary mode; we will do text mode translation ourselves |
| 5970 | if required. */ |
| 5971 | rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY); |
| 5972 | |
| 5973 | if (rc == 0) |
| 5974 | { |
| 5975 | /* Protect against overflow, since Windows can open more handles than |
| 5976 | our fd_info array has room for. */ |
| 5977 | if (phandles[0] >= MAXDESC || phandles[1] >= MAXDESC) |
| 5978 | { |
| 5979 | _close (phandles[0]); |
| 5980 | _close (phandles[1]); |
| 5981 | rc = -1; |
| 5982 | } |
| 5983 | else |
| 5984 | { |
| 5985 | flags = FILE_PIPE | FILE_READ | FILE_BINARY; |
| 5986 | fd_info[phandles[0]].flags = flags; |
| 5987 | |
| 5988 | flags = FILE_PIPE | FILE_WRITE | FILE_BINARY; |
| 5989 | fd_info[phandles[1]].flags = flags; |
| 5990 | } |
| 5991 | } |
| 5992 | |
| 5993 | return rc; |
| 5994 | } |
| 5995 | |
| 5996 | /* Function to do blocking read of one byte, needed to implement |
| 5997 | select. It is only allowed on sockets and pipes. */ |
| 5998 | int |
| 5999 | _sys_read_ahead (int fd) |
| 6000 | { |
| 6001 | child_process * cp; |
| 6002 | int rc; |
| 6003 | |
| 6004 | if (fd < 0 || fd >= MAXDESC) |
| 6005 | return STATUS_READ_ERROR; |
| 6006 | |
| 6007 | cp = fd_info[fd].cp; |
| 6008 | |
| 6009 | if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY) |
| 6010 | return STATUS_READ_ERROR; |
| 6011 | |
| 6012 | if ((fd_info[fd].flags & (FILE_PIPE | FILE_SERIAL | FILE_SOCKET)) == 0 |
| 6013 | || (fd_info[fd].flags & FILE_READ) == 0) |
| 6014 | { |
| 6015 | DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe, serial port, or socket!\n", fd)); |
| 6016 | emacs_abort (); |
| 6017 | } |
| 6018 | |
| 6019 | cp->status = STATUS_READ_IN_PROGRESS; |
| 6020 | |
| 6021 | if (fd_info[fd].flags & FILE_PIPE) |
| 6022 | { |
| 6023 | rc = _read (fd, &cp->chr, sizeof (char)); |
| 6024 | |
| 6025 | /* Give subprocess time to buffer some more output for us before |
| 6026 | reporting that input is available; we need this because Windows 95 |
| 6027 | connects DOS programs to pipes by making the pipe appear to be |
| 6028 | the normal console stdout - as a result most DOS programs will |
| 6029 | write to stdout without buffering, ie. one character at a |
| 6030 | time. Even some W32 programs do this - "dir" in a command |
| 6031 | shell on NT is very slow if we don't do this. */ |
| 6032 | if (rc > 0) |
| 6033 | { |
| 6034 | int wait = w32_pipe_read_delay; |
| 6035 | |
| 6036 | if (wait > 0) |
| 6037 | Sleep (wait); |
| 6038 | else if (wait < 0) |
| 6039 | while (++wait <= 0) |
| 6040 | /* Yield remainder of our time slice, effectively giving a |
| 6041 | temporary priority boost to the child process. */ |
| 6042 | Sleep (0); |
| 6043 | } |
| 6044 | } |
| 6045 | else if (fd_info[fd].flags & FILE_SERIAL) |
| 6046 | { |
| 6047 | HANDLE hnd = fd_info[fd].hnd; |
| 6048 | OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read; |
| 6049 | COMMTIMEOUTS ct; |
| 6050 | |
| 6051 | /* Configure timeouts for blocking read. */ |
| 6052 | if (!GetCommTimeouts (hnd, &ct)) |
| 6053 | return STATUS_READ_ERROR; |
| 6054 | ct.ReadIntervalTimeout = 0; |
| 6055 | ct.ReadTotalTimeoutMultiplier = 0; |
| 6056 | ct.ReadTotalTimeoutConstant = 0; |
| 6057 | if (!SetCommTimeouts (hnd, &ct)) |
| 6058 | return STATUS_READ_ERROR; |
| 6059 | |
| 6060 | if (!ReadFile (hnd, &cp->chr, sizeof (char), (DWORD*) &rc, ovl)) |
| 6061 | { |
| 6062 | if (GetLastError () != ERROR_IO_PENDING) |
| 6063 | return STATUS_READ_ERROR; |
| 6064 | if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE)) |
| 6065 | return STATUS_READ_ERROR; |
| 6066 | } |
| 6067 | } |
| 6068 | else if (fd_info[fd].flags & FILE_SOCKET) |
| 6069 | { |
| 6070 | unsigned long nblock = 0; |
| 6071 | /* We always want this to block, so temporarily disable NDELAY. */ |
| 6072 | if (fd_info[fd].flags & FILE_NDELAY) |
| 6073 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock); |
| 6074 | |
| 6075 | rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0); |
| 6076 | |
| 6077 | if (fd_info[fd].flags & FILE_NDELAY) |
| 6078 | { |
| 6079 | nblock = 1; |
| 6080 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock); |
| 6081 | } |
| 6082 | } |
| 6083 | |
| 6084 | if (rc == sizeof (char)) |
| 6085 | cp->status = STATUS_READ_SUCCEEDED; |
| 6086 | else |
| 6087 | cp->status = STATUS_READ_FAILED; |
| 6088 | |
| 6089 | return cp->status; |
| 6090 | } |
| 6091 | |
| 6092 | int |
| 6093 | _sys_wait_accept (int fd) |
| 6094 | { |
| 6095 | HANDLE hEv; |
| 6096 | child_process * cp; |
| 6097 | int rc; |
| 6098 | |
| 6099 | if (fd < 0 || fd >= MAXDESC) |
| 6100 | return STATUS_READ_ERROR; |
| 6101 | |
| 6102 | cp = fd_info[fd].cp; |
| 6103 | |
| 6104 | if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY) |
| 6105 | return STATUS_READ_ERROR; |
| 6106 | |
| 6107 | cp->status = STATUS_READ_FAILED; |
| 6108 | |
| 6109 | hEv = pfn_WSACreateEvent (); |
| 6110 | rc = pfn_WSAEventSelect (SOCK_HANDLE (fd), hEv, FD_ACCEPT); |
| 6111 | if (rc != SOCKET_ERROR) |
| 6112 | { |
| 6113 | rc = WaitForSingleObject (hEv, INFINITE); |
| 6114 | pfn_WSAEventSelect (SOCK_HANDLE (fd), NULL, 0); |
| 6115 | if (rc == WAIT_OBJECT_0) |
| 6116 | cp->status = STATUS_READ_SUCCEEDED; |
| 6117 | } |
| 6118 | pfn_WSACloseEvent (hEv); |
| 6119 | |
| 6120 | return cp->status; |
| 6121 | } |
| 6122 | |
| 6123 | int |
| 6124 | sys_read (int fd, char * buffer, unsigned int count) |
| 6125 | { |
| 6126 | int nchars; |
| 6127 | int to_read; |
| 6128 | DWORD waiting; |
| 6129 | char * orig_buffer = buffer; |
| 6130 | |
| 6131 | if (fd < 0) |
| 6132 | { |
| 6133 | errno = EBADF; |
| 6134 | return -1; |
| 6135 | } |
| 6136 | |
| 6137 | if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL)) |
| 6138 | { |
| 6139 | child_process *cp = fd_info[fd].cp; |
| 6140 | |
| 6141 | if ((fd_info[fd].flags & FILE_READ) == 0) |
| 6142 | { |
| 6143 | errno = EBADF; |
| 6144 | return -1; |
| 6145 | } |
| 6146 | |
| 6147 | nchars = 0; |
| 6148 | |
| 6149 | /* re-read CR carried over from last read */ |
| 6150 | if (fd_info[fd].flags & FILE_LAST_CR) |
| 6151 | { |
| 6152 | if (fd_info[fd].flags & FILE_BINARY) emacs_abort (); |
| 6153 | *buffer++ = 0x0d; |
| 6154 | count--; |
| 6155 | nchars++; |
| 6156 | fd_info[fd].flags &= ~FILE_LAST_CR; |
| 6157 | } |
| 6158 | |
| 6159 | /* presence of a child_process structure means we are operating in |
| 6160 | non-blocking mode - otherwise we just call _read directly. |
| 6161 | Note that the child_process structure might be missing because |
| 6162 | reap_subprocess has been called; in this case the pipe is |
| 6163 | already broken, so calling _read on it is okay. */ |
| 6164 | if (cp) |
| 6165 | { |
| 6166 | int current_status = cp->status; |
| 6167 | |
| 6168 | switch (current_status) |
| 6169 | { |
| 6170 | case STATUS_READ_FAILED: |
| 6171 | case STATUS_READ_ERROR: |
| 6172 | /* report normal EOF if nothing in buffer */ |
| 6173 | if (nchars <= 0) |
| 6174 | fd_info[fd].flags |= FILE_AT_EOF; |
| 6175 | return nchars; |
| 6176 | |
| 6177 | case STATUS_READ_READY: |
| 6178 | case STATUS_READ_IN_PROGRESS: |
| 6179 | DebPrint (("sys_read called when read is in progress\n")); |
| 6180 | errno = EWOULDBLOCK; |
| 6181 | return -1; |
| 6182 | |
| 6183 | case STATUS_READ_SUCCEEDED: |
| 6184 | /* consume read-ahead char */ |
| 6185 | *buffer++ = cp->chr; |
| 6186 | count--; |
| 6187 | nchars++; |
| 6188 | cp->status = STATUS_READ_ACKNOWLEDGED; |
| 6189 | ResetEvent (cp->char_avail); |
| 6190 | |
| 6191 | case STATUS_READ_ACKNOWLEDGED: |
| 6192 | break; |
| 6193 | |
| 6194 | default: |
| 6195 | DebPrint (("sys_read: bad status %d\n", current_status)); |
| 6196 | errno = EBADF; |
| 6197 | return -1; |
| 6198 | } |
| 6199 | |
| 6200 | if (fd_info[fd].flags & FILE_PIPE) |
| 6201 | { |
| 6202 | PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL); |
| 6203 | to_read = min (waiting, (DWORD) count); |
| 6204 | |
| 6205 | if (to_read > 0) |
| 6206 | nchars += _read (fd, buffer, to_read); |
| 6207 | } |
| 6208 | else if (fd_info[fd].flags & FILE_SERIAL) |
| 6209 | { |
| 6210 | HANDLE hnd = fd_info[fd].hnd; |
| 6211 | OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read; |
| 6212 | int rc = 0; |
| 6213 | COMMTIMEOUTS ct; |
| 6214 | |
| 6215 | if (count > 0) |
| 6216 | { |
| 6217 | /* Configure timeouts for non-blocking read. */ |
| 6218 | if (!GetCommTimeouts (hnd, &ct)) |
| 6219 | { |
| 6220 | errno = EIO; |
| 6221 | return -1; |
| 6222 | } |
| 6223 | ct.ReadIntervalTimeout = MAXDWORD; |
| 6224 | ct.ReadTotalTimeoutMultiplier = 0; |
| 6225 | ct.ReadTotalTimeoutConstant = 0; |
| 6226 | if (!SetCommTimeouts (hnd, &ct)) |
| 6227 | { |
| 6228 | errno = EIO; |
| 6229 | return -1; |
| 6230 | } |
| 6231 | |
| 6232 | if (!ResetEvent (ovl->hEvent)) |
| 6233 | { |
| 6234 | errno = EIO; |
| 6235 | return -1; |
| 6236 | } |
| 6237 | if (!ReadFile (hnd, buffer, count, (DWORD*) &rc, ovl)) |
| 6238 | { |
| 6239 | if (GetLastError () != ERROR_IO_PENDING) |
| 6240 | { |
| 6241 | errno = EIO; |
| 6242 | return -1; |
| 6243 | } |
| 6244 | if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE)) |
| 6245 | { |
| 6246 | errno = EIO; |
| 6247 | return -1; |
| 6248 | } |
| 6249 | } |
| 6250 | nchars += rc; |
| 6251 | } |
| 6252 | } |
| 6253 | else /* FILE_SOCKET */ |
| 6254 | { |
| 6255 | if (winsock_lib == NULL) emacs_abort (); |
| 6256 | |
| 6257 | /* do the equivalent of a non-blocking read */ |
| 6258 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting); |
| 6259 | if (waiting == 0 && nchars == 0) |
| 6260 | { |
| 6261 | h_errno = errno = EWOULDBLOCK; |
| 6262 | return -1; |
| 6263 | } |
| 6264 | |
| 6265 | if (waiting) |
| 6266 | { |
| 6267 | /* always use binary mode for sockets */ |
| 6268 | int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0); |
| 6269 | if (res == SOCKET_ERROR) |
| 6270 | { |
| 6271 | DebPrint (("sys_read.recv failed with error %d on socket %ld\n", |
| 6272 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); |
| 6273 | set_errno (); |
| 6274 | return -1; |
| 6275 | } |
| 6276 | nchars += res; |
| 6277 | } |
| 6278 | } |
| 6279 | } |
| 6280 | else |
| 6281 | { |
| 6282 | int nread = _read (fd, buffer, count); |
| 6283 | if (nread >= 0) |
| 6284 | nchars += nread; |
| 6285 | else if (nchars == 0) |
| 6286 | nchars = nread; |
| 6287 | } |
| 6288 | |
| 6289 | if (nchars <= 0) |
| 6290 | fd_info[fd].flags |= FILE_AT_EOF; |
| 6291 | /* Perform text mode translation if required. */ |
| 6292 | else if ((fd_info[fd].flags & FILE_BINARY) == 0) |
| 6293 | { |
| 6294 | nchars = crlf_to_lf (nchars, orig_buffer); |
| 6295 | /* If buffer contains only CR, return that. To be absolutely |
| 6296 | sure we should attempt to read the next char, but in |
| 6297 | practice a CR to be followed by LF would not appear by |
| 6298 | itself in the buffer. */ |
| 6299 | if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d) |
| 6300 | { |
| 6301 | fd_info[fd].flags |= FILE_LAST_CR; |
| 6302 | nchars--; |
| 6303 | } |
| 6304 | } |
| 6305 | } |
| 6306 | else |
| 6307 | nchars = _read (fd, buffer, count); |
| 6308 | |
| 6309 | return nchars; |
| 6310 | } |
| 6311 | |
| 6312 | /* From w32xfns.c */ |
| 6313 | extern HANDLE interrupt_handle; |
| 6314 | |
| 6315 | /* For now, don't bother with a non-blocking mode */ |
| 6316 | int |
| 6317 | sys_write (int fd, const void * buffer, unsigned int count) |
| 6318 | { |
| 6319 | int nchars; |
| 6320 | |
| 6321 | if (fd < 0) |
| 6322 | { |
| 6323 | errno = EBADF; |
| 6324 | return -1; |
| 6325 | } |
| 6326 | |
| 6327 | if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL)) |
| 6328 | { |
| 6329 | if ((fd_info[fd].flags & FILE_WRITE) == 0) |
| 6330 | { |
| 6331 | errno = EBADF; |
| 6332 | return -1; |
| 6333 | } |
| 6334 | |
| 6335 | /* Perform text mode translation if required. */ |
| 6336 | if ((fd_info[fd].flags & FILE_BINARY) == 0) |
| 6337 | { |
| 6338 | char * tmpbuf = alloca (count * 2); |
| 6339 | unsigned char * src = (void *)buffer; |
| 6340 | unsigned char * dst = tmpbuf; |
| 6341 | int nbytes = count; |
| 6342 | |
| 6343 | while (1) |
| 6344 | { |
| 6345 | unsigned char *next; |
| 6346 | /* copy next line or remaining bytes */ |
| 6347 | next = _memccpy (dst, src, '\n', nbytes); |
| 6348 | if (next) |
| 6349 | { |
| 6350 | /* copied one line ending with '\n' */ |
| 6351 | int copied = next - dst; |
| 6352 | nbytes -= copied; |
| 6353 | src += copied; |
| 6354 | /* insert '\r' before '\n' */ |
| 6355 | next[-1] = '\r'; |
| 6356 | next[0] = '\n'; |
| 6357 | dst = next + 1; |
| 6358 | count++; |
| 6359 | } |
| 6360 | else |
| 6361 | /* copied remaining partial line -> now finished */ |
| 6362 | break; |
| 6363 | } |
| 6364 | buffer = tmpbuf; |
| 6365 | } |
| 6366 | } |
| 6367 | |
| 6368 | if (fd < MAXDESC && fd_info[fd].flags & FILE_SERIAL) |
| 6369 | { |
| 6370 | HANDLE hnd = (HANDLE) _get_osfhandle (fd); |
| 6371 | OVERLAPPED *ovl = &fd_info[fd].cp->ovl_write; |
| 6372 | HANDLE wait_hnd[2] = { interrupt_handle, ovl->hEvent }; |
| 6373 | DWORD active = 0; |
| 6374 | |
| 6375 | if (!WriteFile (hnd, buffer, count, (DWORD*) &nchars, ovl)) |
| 6376 | { |
| 6377 | if (GetLastError () != ERROR_IO_PENDING) |
| 6378 | { |
| 6379 | errno = EIO; |
| 6380 | return -1; |
| 6381 | } |
| 6382 | if (detect_input_pending ()) |
| 6383 | active = MsgWaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE, |
| 6384 | QS_ALLINPUT); |
| 6385 | else |
| 6386 | active = WaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE); |
| 6387 | if (active == WAIT_OBJECT_0) |
| 6388 | { /* User pressed C-g, cancel write, then leave. Don't bother |
| 6389 | cleaning up as we may only get stuck in buggy drivers. */ |
| 6390 | PurgeComm (hnd, PURGE_TXABORT | PURGE_TXCLEAR); |
| 6391 | CancelIo (hnd); |
| 6392 | errno = EIO; |
| 6393 | return -1; |
| 6394 | } |
| 6395 | if (active == WAIT_OBJECT_0 + 1 |
| 6396 | && !GetOverlappedResult (hnd, ovl, (DWORD*) &nchars, TRUE)) |
| 6397 | { |
| 6398 | errno = EIO; |
| 6399 | return -1; |
| 6400 | } |
| 6401 | } |
| 6402 | } |
| 6403 | else if (fd < MAXDESC && fd_info[fd].flags & FILE_SOCKET) |
| 6404 | { |
| 6405 | unsigned long nblock = 0; |
| 6406 | if (winsock_lib == NULL) emacs_abort (); |
| 6407 | |
| 6408 | /* TODO: implement select() properly so non-blocking I/O works. */ |
| 6409 | /* For now, make sure the write blocks. */ |
| 6410 | if (fd_info[fd].flags & FILE_NDELAY) |
| 6411 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock); |
| 6412 | |
| 6413 | nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0); |
| 6414 | |
| 6415 | /* Set the socket back to non-blocking if it was before, |
| 6416 | for other operations that support it. */ |
| 6417 | if (fd_info[fd].flags & FILE_NDELAY) |
| 6418 | { |
| 6419 | nblock = 1; |
| 6420 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock); |
| 6421 | } |
| 6422 | |
| 6423 | if (nchars == SOCKET_ERROR) |
| 6424 | { |
| 6425 | DebPrint (("sys_write.send failed with error %d on socket %ld\n", |
| 6426 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); |
| 6427 | set_errno (); |
| 6428 | } |
| 6429 | } |
| 6430 | else |
| 6431 | { |
| 6432 | /* Some networked filesystems don't like too large writes, so |
| 6433 | break them into smaller chunks. See the Comments section of |
| 6434 | the MSDN documentation of WriteFile for details behind the |
| 6435 | choice of the value of CHUNK below. See also the thread |
| 6436 | http://thread.gmane.org/gmane.comp.version-control.git/145294 |
| 6437 | in the git mailing list. */ |
| 6438 | const unsigned char *p = buffer; |
| 6439 | const unsigned chunk = 30 * 1024 * 1024; |
| 6440 | |
| 6441 | nchars = 0; |
| 6442 | while (count > 0) |
| 6443 | { |
| 6444 | unsigned this_chunk = count < chunk ? count : chunk; |
| 6445 | int n = _write (fd, p, this_chunk); |
| 6446 | |
| 6447 | nchars += n; |
| 6448 | if (n < 0) |
| 6449 | { |
| 6450 | nchars = n; |
| 6451 | break; |
| 6452 | } |
| 6453 | else if (n < this_chunk) |
| 6454 | break; |
| 6455 | count -= n; |
| 6456 | p += n; |
| 6457 | } |
| 6458 | } |
| 6459 | |
| 6460 | return nchars; |
| 6461 | } |
| 6462 | |
| 6463 | /* The Windows CRT functions are "optimized for speed", so they don't |
| 6464 | check for timezone and DST changes if they were last called less |
| 6465 | than 1 minute ago (see http://support.microsoft.com/kb/821231). So |
| 6466 | all Emacs features that repeatedly call time functions (e.g., |
| 6467 | display-time) are in real danger of missing timezone and DST |
| 6468 | changes. Calling tzset before each localtime call fixes that. */ |
| 6469 | struct tm * |
| 6470 | sys_localtime (const time_t *t) |
| 6471 | { |
| 6472 | tzset (); |
| 6473 | return localtime (t); |
| 6474 | } |
| 6475 | |
| 6476 | |
| 6477 | \f |
| 6478 | /* Try loading LIBRARY_ID from the file(s) specified in |
| 6479 | Vdynamic_library_alist. If the library is loaded successfully, |
| 6480 | return the handle of the DLL, and record the filename in the |
| 6481 | property :loaded-from of LIBRARY_ID. If the library could not be |
| 6482 | found, or when it was already loaded (because the handle is not |
| 6483 | recorded anywhere, and so is lost after use), return NULL. |
| 6484 | |
| 6485 | We could also save the handle in :loaded-from, but currently |
| 6486 | there's no use case for it. */ |
| 6487 | HMODULE |
| 6488 | w32_delayed_load (Lisp_Object library_id) |
| 6489 | { |
| 6490 | HMODULE library_dll = NULL; |
| 6491 | |
| 6492 | CHECK_SYMBOL (library_id); |
| 6493 | |
| 6494 | if (CONSP (Vdynamic_library_alist) |
| 6495 | && NILP (Fassq (library_id, Vlibrary_cache))) |
| 6496 | { |
| 6497 | Lisp_Object found = Qnil; |
| 6498 | Lisp_Object dlls = Fassq (library_id, Vdynamic_library_alist); |
| 6499 | |
| 6500 | if (CONSP (dlls)) |
| 6501 | for (dlls = XCDR (dlls); CONSP (dlls); dlls = XCDR (dlls)) |
| 6502 | { |
| 6503 | CHECK_STRING_CAR (dlls); |
| 6504 | if ((library_dll = LoadLibrary (SDATA (XCAR (dlls))))) |
| 6505 | { |
| 6506 | char name[MAX_PATH]; |
| 6507 | DWORD len; |
| 6508 | |
| 6509 | len = GetModuleFileNameA (library_dll, name, sizeof (name)); |
| 6510 | found = Fcons (XCAR (dlls), |
| 6511 | (len > 0) |
| 6512 | /* Possibly truncated */ |
| 6513 | ? make_specified_string (name, -1, len, 1) |
| 6514 | : Qnil); |
| 6515 | break; |
| 6516 | } |
| 6517 | } |
| 6518 | |
| 6519 | Fput (library_id, QCloaded_from, found); |
| 6520 | } |
| 6521 | |
| 6522 | return library_dll; |
| 6523 | } |
| 6524 | |
| 6525 | \f |
| 6526 | void |
| 6527 | check_windows_init_file (void) |
| 6528 | { |
| 6529 | /* A common indication that Emacs is not installed properly is when |
| 6530 | it cannot find the Windows installation file. If this file does |
| 6531 | not exist in the expected place, tell the user. */ |
| 6532 | |
| 6533 | if (!noninteractive && !inhibit_window_system |
| 6534 | /* Vload_path is not yet initialized when we are loading |
| 6535 | loadup.el. */ |
| 6536 | && NILP (Vpurify_flag)) |
| 6537 | { |
| 6538 | Lisp_Object init_file; |
| 6539 | int fd; |
| 6540 | |
| 6541 | init_file = build_string ("term/w32-win"); |
| 6542 | fd = openp (Vload_path, init_file, Fget_load_suffixes (), NULL, Qnil); |
| 6543 | if (fd < 0) |
| 6544 | { |
| 6545 | Lisp_Object load_path_print = Fprin1_to_string (Vload_path, Qnil); |
| 6546 | char *init_file_name = SDATA (init_file); |
| 6547 | char *load_path = SDATA (load_path_print); |
| 6548 | char *buffer = alloca (1024 |
| 6549 | + strlen (init_file_name) |
| 6550 | + strlen (load_path)); |
| 6551 | |
| 6552 | sprintf (buffer, |
| 6553 | "The Emacs Windows initialization file \"%s.el\" " |
| 6554 | "could not be found in your Emacs installation. " |
| 6555 | "Emacs checked the following directories for this file:\n" |
| 6556 | "\n%s\n\n" |
| 6557 | "When Emacs cannot find this file, it usually means that it " |
| 6558 | "was not installed properly, or its distribution file was " |
| 6559 | "not unpacked properly.\nSee the README.W32 file in the " |
| 6560 | "top-level Emacs directory for more information.", |
| 6561 | init_file_name, load_path); |
| 6562 | MessageBox (NULL, |
| 6563 | buffer, |
| 6564 | "Emacs Abort Dialog", |
| 6565 | MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL); |
| 6566 | /* Use the low-level system abort. */ |
| 6567 | abort (); |
| 6568 | } |
| 6569 | else |
| 6570 | { |
| 6571 | _close (fd); |
| 6572 | } |
| 6573 | } |
| 6574 | } |
| 6575 | |
| 6576 | void |
| 6577 | term_ntproc (int ignored) |
| 6578 | { |
| 6579 | (void)ignored; |
| 6580 | |
| 6581 | term_timers (); |
| 6582 | |
| 6583 | /* shutdown the socket interface if necessary */ |
| 6584 | term_winsock (); |
| 6585 | |
| 6586 | term_w32select (); |
| 6587 | } |
| 6588 | |
| 6589 | void |
| 6590 | init_ntproc (int dumping) |
| 6591 | { |
| 6592 | sigset_t initial_mask = 0; |
| 6593 | |
| 6594 | /* Initialize the socket interface now if available and requested by |
| 6595 | the user by defining PRELOAD_WINSOCK; otherwise loading will be |
| 6596 | delayed until open-network-stream is called (w32-has-winsock can |
| 6597 | also be used to dynamically load or reload winsock). |
| 6598 | |
| 6599 | Conveniently, init_environment is called before us, so |
| 6600 | PRELOAD_WINSOCK can be set in the registry. */ |
| 6601 | |
| 6602 | /* Always initialize this correctly. */ |
| 6603 | winsock_lib = NULL; |
| 6604 | |
| 6605 | if (getenv ("PRELOAD_WINSOCK") != NULL) |
| 6606 | init_winsock (TRUE); |
| 6607 | |
| 6608 | /* Initial preparation for subprocess support: replace our standard |
| 6609 | handles with non-inheritable versions. */ |
| 6610 | { |
| 6611 | HANDLE parent; |
| 6612 | HANDLE stdin_save = INVALID_HANDLE_VALUE; |
| 6613 | HANDLE stdout_save = INVALID_HANDLE_VALUE; |
| 6614 | HANDLE stderr_save = INVALID_HANDLE_VALUE; |
| 6615 | |
| 6616 | parent = GetCurrentProcess (); |
| 6617 | |
| 6618 | /* ignore errors when duplicating and closing; typically the |
| 6619 | handles will be invalid when running as a gui program. */ |
| 6620 | DuplicateHandle (parent, |
| 6621 | GetStdHandle (STD_INPUT_HANDLE), |
| 6622 | parent, |
| 6623 | &stdin_save, |
| 6624 | 0, |
| 6625 | FALSE, |
| 6626 | DUPLICATE_SAME_ACCESS); |
| 6627 | |
| 6628 | DuplicateHandle (parent, |
| 6629 | GetStdHandle (STD_OUTPUT_HANDLE), |
| 6630 | parent, |
| 6631 | &stdout_save, |
| 6632 | 0, |
| 6633 | FALSE, |
| 6634 | DUPLICATE_SAME_ACCESS); |
| 6635 | |
| 6636 | DuplicateHandle (parent, |
| 6637 | GetStdHandle (STD_ERROR_HANDLE), |
| 6638 | parent, |
| 6639 | &stderr_save, |
| 6640 | 0, |
| 6641 | FALSE, |
| 6642 | DUPLICATE_SAME_ACCESS); |
| 6643 | |
| 6644 | fclose (stdin); |
| 6645 | fclose (stdout); |
| 6646 | fclose (stderr); |
| 6647 | |
| 6648 | if (stdin_save != INVALID_HANDLE_VALUE) |
| 6649 | _open_osfhandle ((long) stdin_save, O_TEXT); |
| 6650 | else |
| 6651 | _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY); |
| 6652 | _fdopen (0, "r"); |
| 6653 | |
| 6654 | if (stdout_save != INVALID_HANDLE_VALUE) |
| 6655 | _open_osfhandle ((long) stdout_save, O_TEXT); |
| 6656 | else |
| 6657 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
| 6658 | _fdopen (1, "w"); |
| 6659 | |
| 6660 | if (stderr_save != INVALID_HANDLE_VALUE) |
| 6661 | _open_osfhandle ((long) stderr_save, O_TEXT); |
| 6662 | else |
| 6663 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
| 6664 | _fdopen (2, "w"); |
| 6665 | } |
| 6666 | |
| 6667 | /* unfortunately, atexit depends on implementation of malloc */ |
| 6668 | /* atexit (term_ntproc); */ |
| 6669 | if (!dumping) |
| 6670 | { |
| 6671 | /* Make sure we start with all signals unblocked. */ |
| 6672 | sigprocmask (SIG_SETMASK, &initial_mask, NULL); |
| 6673 | signal (SIGABRT, term_ntproc); |
| 6674 | } |
| 6675 | init_timers (); |
| 6676 | |
| 6677 | /* determine which drives are fixed, for GetCachedVolumeInformation */ |
| 6678 | { |
| 6679 | /* GetDriveType must have trailing backslash. */ |
| 6680 | char drive[] = "A:\\"; |
| 6681 | |
| 6682 | /* Loop over all possible drive letters */ |
| 6683 | while (*drive <= 'Z') |
| 6684 | { |
| 6685 | /* Record if this drive letter refers to a fixed drive. */ |
| 6686 | fixed_drives[DRIVE_INDEX (*drive)] = |
| 6687 | (GetDriveType (drive) == DRIVE_FIXED); |
| 6688 | |
| 6689 | (*drive)++; |
| 6690 | } |
| 6691 | |
| 6692 | /* Reset the volume info cache. */ |
| 6693 | volume_cache = NULL; |
| 6694 | } |
| 6695 | } |
| 6696 | |
| 6697 | /* |
| 6698 | shutdown_handler ensures that buffers' autosave files are |
| 6699 | up to date when the user logs off, or the system shuts down. |
| 6700 | */ |
| 6701 | static BOOL WINAPI |
| 6702 | shutdown_handler (DWORD type) |
| 6703 | { |
| 6704 | /* Ctrl-C and Ctrl-Break are already suppressed, so don't handle them. */ |
| 6705 | if (type == CTRL_CLOSE_EVENT /* User closes console window. */ |
| 6706 | || type == CTRL_LOGOFF_EVENT /* User logs off. */ |
| 6707 | || type == CTRL_SHUTDOWN_EVENT) /* User shutsdown. */ |
| 6708 | { |
| 6709 | /* Shut down cleanly, making sure autosave files are up to date. */ |
| 6710 | shut_down_emacs (0, Qnil); |
| 6711 | } |
| 6712 | |
| 6713 | /* Allow other handlers to handle this signal. */ |
| 6714 | return FALSE; |
| 6715 | } |
| 6716 | |
| 6717 | /* |
| 6718 | globals_of_w32 is used to initialize those global variables that |
| 6719 | must always be initialized on startup even when the global variable |
| 6720 | initialized is non zero (see the function main in emacs.c). |
| 6721 | */ |
| 6722 | void |
| 6723 | globals_of_w32 (void) |
| 6724 | { |
| 6725 | HMODULE kernel32 = GetModuleHandle ("kernel32.dll"); |
| 6726 | |
| 6727 | get_process_times_fn = (GetProcessTimes_Proc) |
| 6728 | GetProcAddress (kernel32, "GetProcessTimes"); |
| 6729 | |
| 6730 | DEFSYM (QCloaded_from, ":loaded-from"); |
| 6731 | |
| 6732 | g_b_init_is_windows_9x = 0; |
| 6733 | g_b_init_open_process_token = 0; |
| 6734 | g_b_init_get_token_information = 0; |
| 6735 | g_b_init_lookup_account_sid = 0; |
| 6736 | g_b_init_get_sid_sub_authority = 0; |
| 6737 | g_b_init_get_sid_sub_authority_count = 0; |
| 6738 | g_b_init_get_security_info = 0; |
| 6739 | g_b_init_get_file_security = 0; |
| 6740 | g_b_init_get_security_descriptor_owner = 0; |
| 6741 | g_b_init_get_security_descriptor_group = 0; |
| 6742 | g_b_init_is_valid_sid = 0; |
| 6743 | g_b_init_create_toolhelp32_snapshot = 0; |
| 6744 | g_b_init_process32_first = 0; |
| 6745 | g_b_init_process32_next = 0; |
| 6746 | g_b_init_open_thread_token = 0; |
| 6747 | g_b_init_impersonate_self = 0; |
| 6748 | g_b_init_revert_to_self = 0; |
| 6749 | g_b_init_get_process_memory_info = 0; |
| 6750 | g_b_init_get_process_working_set_size = 0; |
| 6751 | g_b_init_global_memory_status = 0; |
| 6752 | g_b_init_global_memory_status_ex = 0; |
| 6753 | g_b_init_equal_sid = 0; |
| 6754 | g_b_init_copy_sid = 0; |
| 6755 | g_b_init_get_length_sid = 0; |
| 6756 | g_b_init_get_native_system_info = 0; |
| 6757 | g_b_init_get_system_times = 0; |
| 6758 | g_b_init_create_symbolic_link = 0; |
| 6759 | num_of_processors = 0; |
| 6760 | /* The following sets a handler for shutdown notifications for |
| 6761 | console apps. This actually applies to Emacs in both console and |
| 6762 | GUI modes, since we had to fool windows into thinking emacs is a |
| 6763 | console application to get console mode to work. */ |
| 6764 | SetConsoleCtrlHandler (shutdown_handler, TRUE); |
| 6765 | |
| 6766 | /* "None" is the default group name on standalone workstations. */ |
| 6767 | strcpy (dflt_group_name, "None"); |
| 6768 | } |
| 6769 | |
| 6770 | /* For make-serial-process */ |
| 6771 | int |
| 6772 | serial_open (char *port) |
| 6773 | { |
| 6774 | HANDLE hnd; |
| 6775 | child_process *cp; |
| 6776 | int fd = -1; |
| 6777 | |
| 6778 | hnd = CreateFile (port, GENERIC_READ | GENERIC_WRITE, 0, 0, |
| 6779 | OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0); |
| 6780 | if (hnd == INVALID_HANDLE_VALUE) |
| 6781 | error ("Could not open %s", port); |
| 6782 | fd = (int) _open_osfhandle ((int) hnd, 0); |
| 6783 | if (fd == -1) |
| 6784 | error ("Could not open %s", port); |
| 6785 | |
| 6786 | cp = new_child (); |
| 6787 | if (!cp) |
| 6788 | error ("Could not create child process"); |
| 6789 | cp->fd = fd; |
| 6790 | cp->status = STATUS_READ_ACKNOWLEDGED; |
| 6791 | fd_info[ fd ].hnd = hnd; |
| 6792 | fd_info[ fd ].flags |= |
| 6793 | FILE_READ | FILE_WRITE | FILE_BINARY | FILE_SERIAL; |
| 6794 | if (fd_info[ fd ].cp != NULL) |
| 6795 | { |
| 6796 | error ("fd_info[fd = %d] is already in use", fd); |
| 6797 | } |
| 6798 | fd_info[ fd ].cp = cp; |
| 6799 | cp->ovl_read.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL); |
| 6800 | if (cp->ovl_read.hEvent == NULL) |
| 6801 | error ("Could not create read event"); |
| 6802 | cp->ovl_write.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL); |
| 6803 | if (cp->ovl_write.hEvent == NULL) |
| 6804 | error ("Could not create write event"); |
| 6805 | |
| 6806 | return fd; |
| 6807 | } |
| 6808 | |
| 6809 | /* For serial-process-configure */ |
| 6810 | void |
| 6811 | serial_configure (struct Lisp_Process *p, Lisp_Object contact) |
| 6812 | { |
| 6813 | Lisp_Object childp2 = Qnil; |
| 6814 | Lisp_Object tem = Qnil; |
| 6815 | HANDLE hnd; |
| 6816 | DCB dcb; |
| 6817 | COMMTIMEOUTS ct; |
| 6818 | char summary[4] = "???"; /* This usually becomes "8N1". */ |
| 6819 | |
| 6820 | if ((fd_info[ p->outfd ].flags & FILE_SERIAL) == 0) |
| 6821 | error ("Not a serial process"); |
| 6822 | hnd = fd_info[ p->outfd ].hnd; |
| 6823 | |
| 6824 | childp2 = Fcopy_sequence (p->childp); |
| 6825 | |
| 6826 | /* Initialize timeouts for blocking read and blocking write. */ |
| 6827 | if (!GetCommTimeouts (hnd, &ct)) |
| 6828 | error ("GetCommTimeouts() failed"); |
| 6829 | ct.ReadIntervalTimeout = 0; |
| 6830 | ct.ReadTotalTimeoutMultiplier = 0; |
| 6831 | ct.ReadTotalTimeoutConstant = 0; |
| 6832 | ct.WriteTotalTimeoutMultiplier = 0; |
| 6833 | ct.WriteTotalTimeoutConstant = 0; |
| 6834 | if (!SetCommTimeouts (hnd, &ct)) |
| 6835 | error ("SetCommTimeouts() failed"); |
| 6836 | /* Read port attributes and prepare default configuration. */ |
| 6837 | memset (&dcb, 0, sizeof (dcb)); |
| 6838 | dcb.DCBlength = sizeof (DCB); |
| 6839 | if (!GetCommState (hnd, &dcb)) |
| 6840 | error ("GetCommState() failed"); |
| 6841 | dcb.fBinary = TRUE; |
| 6842 | dcb.fNull = FALSE; |
| 6843 | dcb.fAbortOnError = FALSE; |
| 6844 | /* dcb.XonLim and dcb.XoffLim are set by GetCommState() */ |
| 6845 | dcb.ErrorChar = 0; |
| 6846 | dcb.EofChar = 0; |
| 6847 | dcb.EvtChar = 0; |
| 6848 | |
| 6849 | /* Configure speed. */ |
| 6850 | if (!NILP (Fplist_member (contact, QCspeed))) |
| 6851 | tem = Fplist_get (contact, QCspeed); |
| 6852 | else |
| 6853 | tem = Fplist_get (p->childp, QCspeed); |
| 6854 | CHECK_NUMBER (tem); |
| 6855 | dcb.BaudRate = XINT (tem); |
| 6856 | childp2 = Fplist_put (childp2, QCspeed, tem); |
| 6857 | |
| 6858 | /* Configure bytesize. */ |
| 6859 | if (!NILP (Fplist_member (contact, QCbytesize))) |
| 6860 | tem = Fplist_get (contact, QCbytesize); |
| 6861 | else |
| 6862 | tem = Fplist_get (p->childp, QCbytesize); |
| 6863 | if (NILP (tem)) |
| 6864 | tem = make_number (8); |
| 6865 | CHECK_NUMBER (tem); |
| 6866 | if (XINT (tem) != 7 && XINT (tem) != 8) |
| 6867 | error (":bytesize must be nil (8), 7, or 8"); |
| 6868 | dcb.ByteSize = XINT (tem); |
| 6869 | summary[0] = XINT (tem) + '0'; |
| 6870 | childp2 = Fplist_put (childp2, QCbytesize, tem); |
| 6871 | |
| 6872 | /* Configure parity. */ |
| 6873 | if (!NILP (Fplist_member (contact, QCparity))) |
| 6874 | tem = Fplist_get (contact, QCparity); |
| 6875 | else |
| 6876 | tem = Fplist_get (p->childp, QCparity); |
| 6877 | if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd)) |
| 6878 | error (":parity must be nil (no parity), `even', or `odd'"); |
| 6879 | dcb.fParity = FALSE; |
| 6880 | dcb.Parity = NOPARITY; |
| 6881 | dcb.fErrorChar = FALSE; |
| 6882 | if (NILP (tem)) |
| 6883 | { |
| 6884 | summary[1] = 'N'; |
| 6885 | } |
| 6886 | else if (EQ (tem, Qeven)) |
| 6887 | { |
| 6888 | summary[1] = 'E'; |
| 6889 | dcb.fParity = TRUE; |
| 6890 | dcb.Parity = EVENPARITY; |
| 6891 | dcb.fErrorChar = TRUE; |
| 6892 | } |
| 6893 | else if (EQ (tem, Qodd)) |
| 6894 | { |
| 6895 | summary[1] = 'O'; |
| 6896 | dcb.fParity = TRUE; |
| 6897 | dcb.Parity = ODDPARITY; |
| 6898 | dcb.fErrorChar = TRUE; |
| 6899 | } |
| 6900 | childp2 = Fplist_put (childp2, QCparity, tem); |
| 6901 | |
| 6902 | /* Configure stopbits. */ |
| 6903 | if (!NILP (Fplist_member (contact, QCstopbits))) |
| 6904 | tem = Fplist_get (contact, QCstopbits); |
| 6905 | else |
| 6906 | tem = Fplist_get (p->childp, QCstopbits); |
| 6907 | if (NILP (tem)) |
| 6908 | tem = make_number (1); |
| 6909 | CHECK_NUMBER (tem); |
| 6910 | if (XINT (tem) != 1 && XINT (tem) != 2) |
| 6911 | error (":stopbits must be nil (1 stopbit), 1, or 2"); |
| 6912 | summary[2] = XINT (tem) + '0'; |
| 6913 | if (XINT (tem) == 1) |
| 6914 | dcb.StopBits = ONESTOPBIT; |
| 6915 | else if (XINT (tem) == 2) |
| 6916 | dcb.StopBits = TWOSTOPBITS; |
| 6917 | childp2 = Fplist_put (childp2, QCstopbits, tem); |
| 6918 | |
| 6919 | /* Configure flowcontrol. */ |
| 6920 | if (!NILP (Fplist_member (contact, QCflowcontrol))) |
| 6921 | tem = Fplist_get (contact, QCflowcontrol); |
| 6922 | else |
| 6923 | tem = Fplist_get (p->childp, QCflowcontrol); |
| 6924 | if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw)) |
| 6925 | error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'"); |
| 6926 | dcb.fOutxCtsFlow = FALSE; |
| 6927 | dcb.fOutxDsrFlow = FALSE; |
| 6928 | dcb.fDtrControl = DTR_CONTROL_DISABLE; |
| 6929 | dcb.fDsrSensitivity = FALSE; |
| 6930 | dcb.fTXContinueOnXoff = FALSE; |
| 6931 | dcb.fOutX = FALSE; |
| 6932 | dcb.fInX = FALSE; |
| 6933 | dcb.fRtsControl = RTS_CONTROL_DISABLE; |
| 6934 | dcb.XonChar = 17; /* Control-Q */ |
| 6935 | dcb.XoffChar = 19; /* Control-S */ |
| 6936 | if (NILP (tem)) |
| 6937 | { |
| 6938 | /* Already configured. */ |
| 6939 | } |
| 6940 | else if (EQ (tem, Qhw)) |
| 6941 | { |
| 6942 | dcb.fRtsControl = RTS_CONTROL_HANDSHAKE; |
| 6943 | dcb.fOutxCtsFlow = TRUE; |
| 6944 | } |
| 6945 | else if (EQ (tem, Qsw)) |
| 6946 | { |
| 6947 | dcb.fOutX = TRUE; |
| 6948 | dcb.fInX = TRUE; |
| 6949 | } |
| 6950 | childp2 = Fplist_put (childp2, QCflowcontrol, tem); |
| 6951 | |
| 6952 | /* Activate configuration. */ |
| 6953 | if (!SetCommState (hnd, &dcb)) |
| 6954 | error ("SetCommState() failed"); |
| 6955 | |
| 6956 | childp2 = Fplist_put (childp2, QCsummary, build_string (summary)); |
| 6957 | pset_childp (p, childp2); |
| 6958 | } |
| 6959 | |
| 6960 | #ifdef HAVE_GNUTLS |
| 6961 | |
| 6962 | ssize_t |
| 6963 | emacs_gnutls_pull (gnutls_transport_ptr_t p, void* buf, size_t sz) |
| 6964 | { |
| 6965 | int n, sc, err; |
| 6966 | SELECT_TYPE fdset; |
| 6967 | struct timeval timeout; |
| 6968 | struct Lisp_Process *process = (struct Lisp_Process *)p; |
| 6969 | int fd = process->infd; |
| 6970 | |
| 6971 | for (;;) |
| 6972 | { |
| 6973 | n = sys_read (fd, (char*)buf, sz); |
| 6974 | |
| 6975 | if (n >= 0) |
| 6976 | return n; |
| 6977 | |
| 6978 | err = errno; |
| 6979 | |
| 6980 | if (err == EWOULDBLOCK) |
| 6981 | { |
| 6982 | /* Set a small timeout. */ |
| 6983 | timeout.tv_sec = 1; |
| 6984 | timeout.tv_usec = 0; |
| 6985 | FD_ZERO (&fdset); |
| 6986 | FD_SET ((int)fd, &fdset); |
| 6987 | |
| 6988 | /* Use select with the timeout to poll the selector. */ |
| 6989 | sc = select (fd + 1, &fdset, (SELECT_TYPE *)0, (SELECT_TYPE *)0, |
| 6990 | &timeout, NULL); |
| 6991 | |
| 6992 | if (sc > 0) |
| 6993 | continue; /* Try again. */ |
| 6994 | |
| 6995 | /* Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. |
| 6996 | Also accept select return 0 as an indicator to EAGAIN. */ |
| 6997 | if (sc == 0 || errno == EWOULDBLOCK) |
| 6998 | err = EAGAIN; |
| 6999 | else |
| 7000 | err = errno; /* Other errors are just passed on. */ |
| 7001 | } |
| 7002 | |
| 7003 | emacs_gnutls_transport_set_errno (process->gnutls_state, err); |
| 7004 | |
| 7005 | return -1; |
| 7006 | } |
| 7007 | } |
| 7008 | |
| 7009 | ssize_t |
| 7010 | emacs_gnutls_push (gnutls_transport_ptr_t p, const void* buf, size_t sz) |
| 7011 | { |
| 7012 | struct Lisp_Process *process = (struct Lisp_Process *)p; |
| 7013 | int fd = process->outfd; |
| 7014 | ssize_t n = sys_write (fd, buf, sz); |
| 7015 | |
| 7016 | /* 0 or more bytes written means everything went fine. */ |
| 7017 | if (n >= 0) |
| 7018 | return n; |
| 7019 | |
| 7020 | /* Negative bytes written means we got an error in errno. |
| 7021 | Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. */ |
| 7022 | emacs_gnutls_transport_set_errno (process->gnutls_state, |
| 7023 | errno == EWOULDBLOCK ? EAGAIN : errno); |
| 7024 | |
| 7025 | return -1; |
| 7026 | } |
| 7027 | #endif /* HAVE_GNUTLS */ |
| 7028 | |
| 7029 | /* end of w32.c */ |