| 1 | /* Process support for GNU Emacs on the Microsoft W32 API. |
| 2 | Copyright (C) 1992, 1995, 1999, 2000, 2001 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 2, or (at your option) |
| 9 | 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; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. |
| 20 | |
| 21 | Drew Bliss Oct 14, 1993 |
| 22 | Adapted from alarm.c by Tim Fleehart |
| 23 | */ |
| 24 | |
| 25 | #include <stdio.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <errno.h> |
| 28 | #include <io.h> |
| 29 | #include <fcntl.h> |
| 30 | #include <signal.h> |
| 31 | #include <sys/file.h> |
| 32 | |
| 33 | /* must include CRT headers *before* config.h */ |
| 34 | |
| 35 | #ifdef HAVE_CONFIG_H |
| 36 | #include <config.h> |
| 37 | #endif |
| 38 | |
| 39 | #undef signal |
| 40 | #undef wait |
| 41 | #undef spawnve |
| 42 | #undef select |
| 43 | #undef kill |
| 44 | |
| 45 | #include <windows.h> |
| 46 | #ifdef __GNUC__ |
| 47 | /* This definition is missing from mingw32 headers. */ |
| 48 | extern BOOL WINAPI IsValidLocale(LCID, DWORD); |
| 49 | #endif |
| 50 | |
| 51 | #include "lisp.h" |
| 52 | #include "w32.h" |
| 53 | #include "w32heap.h" |
| 54 | #include "systime.h" |
| 55 | #include "syswait.h" |
| 56 | #include "process.h" |
| 57 | #include "syssignal.h" |
| 58 | #include "w32term.h" |
| 59 | |
| 60 | /* Control whether spawnve quotes arguments as necessary to ensure |
| 61 | correct parsing by child process. Because not all uses of spawnve |
| 62 | are careful about constructing argv arrays, we make this behaviour |
| 63 | conditional (off by default). */ |
| 64 | Lisp_Object Vw32_quote_process_args; |
| 65 | |
| 66 | /* Control whether create_child causes the process' window to be |
| 67 | hidden. The default is nil. */ |
| 68 | Lisp_Object Vw32_start_process_show_window; |
| 69 | |
| 70 | /* Control whether create_child causes the process to inherit Emacs' |
| 71 | console window, or be given a new one of its own. The default is |
| 72 | nil, to allow multiple DOS programs to run on Win95. Having separate |
| 73 | consoles also allows Emacs to cleanly terminate process groups. */ |
| 74 | Lisp_Object Vw32_start_process_share_console; |
| 75 | |
| 76 | /* Control whether create_child cause the process to inherit Emacs' |
| 77 | error mode setting. The default is t, to minimize the possibility of |
| 78 | subprocesses blocking when accessing unmounted drives. */ |
| 79 | Lisp_Object Vw32_start_process_inherit_error_mode; |
| 80 | |
| 81 | /* Time to sleep before reading from a subprocess output pipe - this |
| 82 | avoids the inefficiency of frequently reading small amounts of data. |
| 83 | This is primarily necessary for handling DOS processes on Windows 95, |
| 84 | but is useful for W32 processes on both Windows 95 and NT as well. */ |
| 85 | Lisp_Object Vw32_pipe_read_delay; |
| 86 | |
| 87 | /* Control conversion of upper case file names to lower case. |
| 88 | nil means no, t means yes. */ |
| 89 | Lisp_Object Vw32_downcase_file_names; |
| 90 | |
| 91 | /* Control whether stat() attempts to generate fake but hopefully |
| 92 | "accurate" inode values, by hashing the absolute truenames of files. |
| 93 | This should detect aliasing between long and short names, but still |
| 94 | allows the possibility of hash collisions. */ |
| 95 | Lisp_Object Vw32_generate_fake_inodes; |
| 96 | |
| 97 | /* Control whether stat() attempts to determine file type and link count |
| 98 | exactly, at the expense of slower operation. Since true hard links |
| 99 | are supported on NTFS volumes, this is only relevant on NT. */ |
| 100 | Lisp_Object Vw32_get_true_file_attributes; |
| 101 | |
| 102 | Lisp_Object Qhigh, Qlow; |
| 103 | |
| 104 | #ifdef EMACSDEBUG |
| 105 | void _DebPrint (const char *fmt, ...) |
| 106 | { |
| 107 | char buf[1024]; |
| 108 | va_list args; |
| 109 | |
| 110 | va_start (args, fmt); |
| 111 | vsprintf (buf, fmt, args); |
| 112 | va_end (args); |
| 113 | OutputDebugString (buf); |
| 114 | } |
| 115 | #endif |
| 116 | |
| 117 | typedef void (_CALLBACK_ *signal_handler)(int); |
| 118 | |
| 119 | /* Signal handlers...SIG_DFL == 0 so this is initialized correctly. */ |
| 120 | static signal_handler sig_handlers[NSIG]; |
| 121 | |
| 122 | /* Fake signal implementation to record the SIGCHLD handler. */ |
| 123 | signal_handler |
| 124 | sys_signal (int sig, signal_handler handler) |
| 125 | { |
| 126 | signal_handler old; |
| 127 | |
| 128 | if (sig != SIGCHLD) |
| 129 | { |
| 130 | errno = EINVAL; |
| 131 | return SIG_ERR; |
| 132 | } |
| 133 | old = sig_handlers[sig]; |
| 134 | sig_handlers[sig] = handler; |
| 135 | return old; |
| 136 | } |
| 137 | |
| 138 | /* Defined in <process.h> which conflicts with the local copy */ |
| 139 | #define _P_NOWAIT 1 |
| 140 | |
| 141 | /* Child process management list. */ |
| 142 | int child_proc_count = 0; |
| 143 | child_process child_procs[ MAX_CHILDREN ]; |
| 144 | child_process *dead_child = NULL; |
| 145 | |
| 146 | DWORD WINAPI reader_thread (void *arg); |
| 147 | |
| 148 | /* Find an unused process slot. */ |
| 149 | child_process * |
| 150 | new_child (void) |
| 151 | { |
| 152 | child_process *cp; |
| 153 | DWORD id; |
| 154 | |
| 155 | for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--) |
| 156 | if (!CHILD_ACTIVE (cp)) |
| 157 | goto Initialise; |
| 158 | if (child_proc_count == MAX_CHILDREN) |
| 159 | return NULL; |
| 160 | cp = &child_procs[child_proc_count++]; |
| 161 | |
| 162 | Initialise: |
| 163 | memset (cp, 0, sizeof(*cp)); |
| 164 | cp->fd = -1; |
| 165 | cp->pid = -1; |
| 166 | cp->procinfo.hProcess = NULL; |
| 167 | cp->status = STATUS_READ_ERROR; |
| 168 | |
| 169 | /* use manual reset event so that select() will function properly */ |
| 170 | cp->char_avail = CreateEvent (NULL, TRUE, FALSE, NULL); |
| 171 | if (cp->char_avail) |
| 172 | { |
| 173 | cp->char_consumed = CreateEvent (NULL, FALSE, FALSE, NULL); |
| 174 | if (cp->char_consumed) |
| 175 | { |
| 176 | cp->thrd = CreateThread (NULL, 1024, reader_thread, cp, 0, &id); |
| 177 | if (cp->thrd) |
| 178 | return cp; |
| 179 | } |
| 180 | } |
| 181 | delete_child (cp); |
| 182 | return NULL; |
| 183 | } |
| 184 | |
| 185 | void |
| 186 | delete_child (child_process *cp) |
| 187 | { |
| 188 | int i; |
| 189 | |
| 190 | /* Should not be deleting a child that is still needed. */ |
| 191 | for (i = 0; i < MAXDESC; i++) |
| 192 | if (fd_info[i].cp == cp) |
| 193 | abort (); |
| 194 | |
| 195 | if (!CHILD_ACTIVE (cp)) |
| 196 | return; |
| 197 | |
| 198 | /* reap thread if necessary */ |
| 199 | if (cp->thrd) |
| 200 | { |
| 201 | DWORD rc; |
| 202 | |
| 203 | if (GetExitCodeThread (cp->thrd, &rc) && rc == STILL_ACTIVE) |
| 204 | { |
| 205 | /* let the thread exit cleanly if possible */ |
| 206 | cp->status = STATUS_READ_ERROR; |
| 207 | SetEvent (cp->char_consumed); |
| 208 | if (WaitForSingleObject (cp->thrd, 1000) != WAIT_OBJECT_0) |
| 209 | { |
| 210 | DebPrint (("delete_child.WaitForSingleObject (thread) failed " |
| 211 | "with %lu for fd %ld\n", GetLastError (), cp->fd)); |
| 212 | TerminateThread (cp->thrd, 0); |
| 213 | } |
| 214 | } |
| 215 | CloseHandle (cp->thrd); |
| 216 | cp->thrd = NULL; |
| 217 | } |
| 218 | if (cp->char_avail) |
| 219 | { |
| 220 | CloseHandle (cp->char_avail); |
| 221 | cp->char_avail = NULL; |
| 222 | } |
| 223 | if (cp->char_consumed) |
| 224 | { |
| 225 | CloseHandle (cp->char_consumed); |
| 226 | cp->char_consumed = NULL; |
| 227 | } |
| 228 | |
| 229 | /* update child_proc_count (highest numbered slot in use plus one) */ |
| 230 | if (cp == child_procs + child_proc_count - 1) |
| 231 | { |
| 232 | for (i = child_proc_count-1; i >= 0; i--) |
| 233 | if (CHILD_ACTIVE (&child_procs[i])) |
| 234 | { |
| 235 | child_proc_count = i + 1; |
| 236 | break; |
| 237 | } |
| 238 | } |
| 239 | if (i < 0) |
| 240 | child_proc_count = 0; |
| 241 | } |
| 242 | |
| 243 | /* Find a child by pid. */ |
| 244 | static child_process * |
| 245 | find_child_pid (DWORD pid) |
| 246 | { |
| 247 | child_process *cp; |
| 248 | |
| 249 | for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--) |
| 250 | if (CHILD_ACTIVE (cp) && pid == cp->pid) |
| 251 | return cp; |
| 252 | return NULL; |
| 253 | } |
| 254 | |
| 255 | |
| 256 | /* Thread proc for child process and socket reader threads. Each thread |
| 257 | is normally blocked until woken by select() to check for input by |
| 258 | reading one char. When the read completes, char_avail is signalled |
| 259 | to wake up the select emulator and the thread blocks itself again. */ |
| 260 | DWORD WINAPI |
| 261 | reader_thread (void *arg) |
| 262 | { |
| 263 | child_process *cp; |
| 264 | |
| 265 | /* Our identity */ |
| 266 | cp = (child_process *)arg; |
| 267 | |
| 268 | /* We have to wait for the go-ahead before we can start */ |
| 269 | if (cp == NULL |
| 270 | || WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0) |
| 271 | return 1; |
| 272 | |
| 273 | for (;;) |
| 274 | { |
| 275 | int rc; |
| 276 | |
| 277 | rc = _sys_read_ahead (cp->fd); |
| 278 | |
| 279 | /* The name char_avail is a misnomer - it really just means the |
| 280 | read-ahead has completed, whether successfully or not. */ |
| 281 | if (!SetEvent (cp->char_avail)) |
| 282 | { |
| 283 | DebPrint (("reader_thread.SetEvent failed with %lu for fd %ld\n", |
| 284 | GetLastError (), cp->fd)); |
| 285 | return 1; |
| 286 | } |
| 287 | |
| 288 | if (rc == STATUS_READ_ERROR) |
| 289 | return 1; |
| 290 | |
| 291 | /* If the read died, the child has died so let the thread die */ |
| 292 | if (rc == STATUS_READ_FAILED) |
| 293 | break; |
| 294 | |
| 295 | /* Wait until our input is acknowledged before reading again */ |
| 296 | if (WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0) |
| 297 | { |
| 298 | DebPrint (("reader_thread.WaitForSingleObject failed with " |
| 299 | "%lu for fd %ld\n", GetLastError (), cp->fd)); |
| 300 | break; |
| 301 | } |
| 302 | } |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | /* To avoid Emacs changing directory, we just record here the directory |
| 307 | the new process should start in. This is set just before calling |
| 308 | sys_spawnve, and is not generally valid at any other time. */ |
| 309 | static char * process_dir; |
| 310 | |
| 311 | static BOOL |
| 312 | create_child (char *exe, char *cmdline, char *env, int is_gui_app, |
| 313 | int * pPid, child_process *cp) |
| 314 | { |
| 315 | STARTUPINFO start; |
| 316 | SECURITY_ATTRIBUTES sec_attrs; |
| 317 | #if 0 |
| 318 | SECURITY_DESCRIPTOR sec_desc; |
| 319 | #endif |
| 320 | DWORD flags; |
| 321 | char dir[ MAXPATHLEN ]; |
| 322 | |
| 323 | if (cp == NULL) abort (); |
| 324 | |
| 325 | memset (&start, 0, sizeof (start)); |
| 326 | start.cb = sizeof (start); |
| 327 | |
| 328 | #ifdef HAVE_NTGUI |
| 329 | if (NILP (Vw32_start_process_show_window) && !is_gui_app) |
| 330 | start.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; |
| 331 | else |
| 332 | start.dwFlags = STARTF_USESTDHANDLES; |
| 333 | start.wShowWindow = SW_HIDE; |
| 334 | |
| 335 | start.hStdInput = GetStdHandle (STD_INPUT_HANDLE); |
| 336 | start.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE); |
| 337 | start.hStdError = GetStdHandle (STD_ERROR_HANDLE); |
| 338 | #endif /* HAVE_NTGUI */ |
| 339 | |
| 340 | #if 0 |
| 341 | /* Explicitly specify no security */ |
| 342 | if (!InitializeSecurityDescriptor (&sec_desc, SECURITY_DESCRIPTOR_REVISION)) |
| 343 | goto EH_Fail; |
| 344 | if (!SetSecurityDescriptorDacl (&sec_desc, TRUE, NULL, FALSE)) |
| 345 | goto EH_Fail; |
| 346 | #endif |
| 347 | sec_attrs.nLength = sizeof (sec_attrs); |
| 348 | sec_attrs.lpSecurityDescriptor = NULL /* &sec_desc */; |
| 349 | sec_attrs.bInheritHandle = FALSE; |
| 350 | |
| 351 | strcpy (dir, process_dir); |
| 352 | unixtodos_filename (dir); |
| 353 | |
| 354 | flags = (!NILP (Vw32_start_process_share_console) |
| 355 | ? CREATE_NEW_PROCESS_GROUP |
| 356 | : CREATE_NEW_CONSOLE); |
| 357 | if (NILP (Vw32_start_process_inherit_error_mode)) |
| 358 | flags |= CREATE_DEFAULT_ERROR_MODE; |
| 359 | if (!CreateProcess (exe, cmdline, &sec_attrs, NULL, TRUE, |
| 360 | flags, env, dir, &start, &cp->procinfo)) |
| 361 | goto EH_Fail; |
| 362 | |
| 363 | cp->pid = (int) cp->procinfo.dwProcessId; |
| 364 | |
| 365 | /* Hack for Windows 95, which assigns large (ie negative) pids */ |
| 366 | if (cp->pid < 0) |
| 367 | cp->pid = -cp->pid; |
| 368 | |
| 369 | /* pid must fit in a Lisp_Int */ |
| 370 | cp->pid = (cp->pid & VALMASK); |
| 371 | |
| 372 | *pPid = cp->pid; |
| 373 | |
| 374 | return TRUE; |
| 375 | |
| 376 | EH_Fail: |
| 377 | DebPrint (("create_child.CreateProcess failed: %ld\n", GetLastError());); |
| 378 | return FALSE; |
| 379 | } |
| 380 | |
| 381 | /* create_child doesn't know what emacs' file handle will be for waiting |
| 382 | on output from the child, so we need to make this additional call |
| 383 | to register the handle with the process |
| 384 | This way the select emulator knows how to match file handles with |
| 385 | entries in child_procs. */ |
| 386 | void |
| 387 | register_child (int pid, int fd) |
| 388 | { |
| 389 | child_process *cp; |
| 390 | |
| 391 | cp = find_child_pid (pid); |
| 392 | if (cp == NULL) |
| 393 | { |
| 394 | DebPrint (("register_child unable to find pid %lu\n", pid)); |
| 395 | return; |
| 396 | } |
| 397 | |
| 398 | #ifdef FULL_DEBUG |
| 399 | DebPrint (("register_child registered fd %d with pid %lu\n", fd, pid)); |
| 400 | #endif |
| 401 | |
| 402 | cp->fd = fd; |
| 403 | |
| 404 | /* thread is initially blocked until select is called; set status so |
| 405 | that select will release thread */ |
| 406 | cp->status = STATUS_READ_ACKNOWLEDGED; |
| 407 | |
| 408 | /* attach child_process to fd_info */ |
| 409 | if (fd_info[fd].cp != NULL) |
| 410 | { |
| 411 | DebPrint (("register_child: fd_info[%d] apparently in use!\n", fd)); |
| 412 | abort (); |
| 413 | } |
| 414 | |
| 415 | fd_info[fd].cp = cp; |
| 416 | } |
| 417 | |
| 418 | /* When a process dies its pipe will break so the reader thread will |
| 419 | signal failure to the select emulator. |
| 420 | The select emulator then calls this routine to clean up. |
| 421 | Since the thread signaled failure we can assume it is exiting. */ |
| 422 | static void |
| 423 | reap_subprocess (child_process *cp) |
| 424 | { |
| 425 | if (cp->procinfo.hProcess) |
| 426 | { |
| 427 | /* Reap the process */ |
| 428 | #ifdef FULL_DEBUG |
| 429 | /* Process should have already died before we are called. */ |
| 430 | if (WaitForSingleObject (cp->procinfo.hProcess, 0) != WAIT_OBJECT_0) |
| 431 | DebPrint (("reap_subprocess: child fpr fd %d has not died yet!", cp->fd)); |
| 432 | #endif |
| 433 | CloseHandle (cp->procinfo.hProcess); |
| 434 | cp->procinfo.hProcess = NULL; |
| 435 | CloseHandle (cp->procinfo.hThread); |
| 436 | cp->procinfo.hThread = NULL; |
| 437 | } |
| 438 | |
| 439 | /* For asynchronous children, the child_proc resources will be freed |
| 440 | when the last pipe read descriptor is closed; for synchronous |
| 441 | children, we must explicitly free the resources now because |
| 442 | register_child has not been called. */ |
| 443 | if (cp->fd == -1) |
| 444 | delete_child (cp); |
| 445 | } |
| 446 | |
| 447 | /* Wait for any of our existing child processes to die |
| 448 | When it does, close its handle |
| 449 | Return the pid and fill in the status if non-NULL. */ |
| 450 | |
| 451 | int |
| 452 | sys_wait (int *status) |
| 453 | { |
| 454 | DWORD active, retval; |
| 455 | int nh; |
| 456 | int pid; |
| 457 | child_process *cp, *cps[MAX_CHILDREN]; |
| 458 | HANDLE wait_hnd[MAX_CHILDREN]; |
| 459 | |
| 460 | nh = 0; |
| 461 | if (dead_child != NULL) |
| 462 | { |
| 463 | /* We want to wait for a specific child */ |
| 464 | wait_hnd[nh] = dead_child->procinfo.hProcess; |
| 465 | cps[nh] = dead_child; |
| 466 | if (!wait_hnd[nh]) abort (); |
| 467 | nh++; |
| 468 | active = 0; |
| 469 | goto get_result; |
| 470 | } |
| 471 | else |
| 472 | { |
| 473 | for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--) |
| 474 | /* some child_procs might be sockets; ignore them */ |
| 475 | if (CHILD_ACTIVE (cp) && cp->procinfo.hProcess) |
| 476 | { |
| 477 | wait_hnd[nh] = cp->procinfo.hProcess; |
| 478 | cps[nh] = cp; |
| 479 | nh++; |
| 480 | } |
| 481 | } |
| 482 | |
| 483 | if (nh == 0) |
| 484 | { |
| 485 | /* Nothing to wait on, so fail */ |
| 486 | errno = ECHILD; |
| 487 | return -1; |
| 488 | } |
| 489 | |
| 490 | do |
| 491 | { |
| 492 | /* Check for quit about once a second. */ |
| 493 | QUIT; |
| 494 | active = WaitForMultipleObjects (nh, wait_hnd, FALSE, 1000); |
| 495 | } while (active == WAIT_TIMEOUT); |
| 496 | |
| 497 | if (active == WAIT_FAILED) |
| 498 | { |
| 499 | errno = EBADF; |
| 500 | return -1; |
| 501 | } |
| 502 | else if (active >= WAIT_OBJECT_0 |
| 503 | && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) |
| 504 | { |
| 505 | active -= WAIT_OBJECT_0; |
| 506 | } |
| 507 | else if (active >= WAIT_ABANDONED_0 |
| 508 | && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) |
| 509 | { |
| 510 | active -= WAIT_ABANDONED_0; |
| 511 | } |
| 512 | else |
| 513 | abort (); |
| 514 | |
| 515 | get_result: |
| 516 | if (!GetExitCodeProcess (wait_hnd[active], &retval)) |
| 517 | { |
| 518 | DebPrint (("Wait.GetExitCodeProcess failed with %lu\n", |
| 519 | GetLastError ())); |
| 520 | retval = 1; |
| 521 | } |
| 522 | if (retval == STILL_ACTIVE) |
| 523 | { |
| 524 | /* Should never happen */ |
| 525 | DebPrint (("Wait.WaitForMultipleObjects returned an active process\n")); |
| 526 | errno = EINVAL; |
| 527 | return -1; |
| 528 | } |
| 529 | |
| 530 | /* Massage the exit code from the process to match the format expected |
| 531 | by the WIFSTOPPED et al macros in syswait.h. Only WIFSIGNALED and |
| 532 | WIFEXITED are supported; WIFSTOPPED doesn't make sense under NT. */ |
| 533 | |
| 534 | if (retval == STATUS_CONTROL_C_EXIT) |
| 535 | retval = SIGINT; |
| 536 | else |
| 537 | retval <<= 8; |
| 538 | |
| 539 | cp = cps[active]; |
| 540 | pid = cp->pid; |
| 541 | #ifdef FULL_DEBUG |
| 542 | DebPrint (("Wait signaled with process pid %d\n", cp->pid)); |
| 543 | #endif |
| 544 | |
| 545 | if (status) |
| 546 | { |
| 547 | *status = retval; |
| 548 | } |
| 549 | else if (synch_process_alive) |
| 550 | { |
| 551 | synch_process_alive = 0; |
| 552 | |
| 553 | /* Report the status of the synchronous process. */ |
| 554 | if (WIFEXITED (retval)) |
| 555 | synch_process_retcode = WRETCODE (retval); |
| 556 | else if (WIFSIGNALED (retval)) |
| 557 | { |
| 558 | int code = WTERMSIG (retval); |
| 559 | char *signame; |
| 560 | |
| 561 | synchronize_system_messages_locale (); |
| 562 | signame = strsignal (code); |
| 563 | |
| 564 | if (signame == 0) |
| 565 | signame = "unknown"; |
| 566 | |
| 567 | synch_process_death = signame; |
| 568 | } |
| 569 | |
| 570 | reap_subprocess (cp); |
| 571 | } |
| 572 | |
| 573 | reap_subprocess (cp); |
| 574 | |
| 575 | return pid; |
| 576 | } |
| 577 | |
| 578 | void |
| 579 | w32_executable_type (char * filename, int * is_dos_app, int * is_cygnus_app, int * is_gui_app) |
| 580 | { |
| 581 | file_data executable; |
| 582 | char * p; |
| 583 | |
| 584 | /* Default values in case we can't tell for sure. */ |
| 585 | *is_dos_app = FALSE; |
| 586 | *is_cygnus_app = FALSE; |
| 587 | *is_gui_app = FALSE; |
| 588 | |
| 589 | if (!open_input_file (&executable, filename)) |
| 590 | return; |
| 591 | |
| 592 | p = strrchr (filename, '.'); |
| 593 | |
| 594 | /* We can only identify DOS .com programs from the extension. */ |
| 595 | if (p && stricmp (p, ".com") == 0) |
| 596 | *is_dos_app = TRUE; |
| 597 | else if (p && (stricmp (p, ".bat") == 0 |
| 598 | || stricmp (p, ".cmd") == 0)) |
| 599 | { |
| 600 | /* A DOS shell script - it appears that CreateProcess is happy to |
| 601 | accept this (somewhat surprisingly); presumably it looks at |
| 602 | COMSPEC to determine what executable to actually invoke. |
| 603 | Therefore, we have to do the same here as well. */ |
| 604 | /* Actually, I think it uses the program association for that |
| 605 | extension, which is defined in the registry. */ |
| 606 | p = egetenv ("COMSPEC"); |
| 607 | if (p) |
| 608 | w32_executable_type (p, is_dos_app, is_cygnus_app, is_gui_app); |
| 609 | } |
| 610 | else |
| 611 | { |
| 612 | /* Look for DOS .exe signature - if found, we must also check that |
| 613 | it isn't really a 16- or 32-bit Windows exe, since both formats |
| 614 | start with a DOS program stub. Note that 16-bit Windows |
| 615 | executables use the OS/2 1.x format. */ |
| 616 | |
| 617 | IMAGE_DOS_HEADER * dos_header; |
| 618 | IMAGE_NT_HEADERS * nt_header; |
| 619 | |
| 620 | dos_header = (PIMAGE_DOS_HEADER) executable.file_base; |
| 621 | if (dos_header->e_magic != IMAGE_DOS_SIGNATURE) |
| 622 | goto unwind; |
| 623 | |
| 624 | nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew); |
| 625 | |
| 626 | if ((char *) nt_header > (char *) dos_header + executable.size) |
| 627 | { |
| 628 | /* Some dos headers (pkunzip) have bogus e_lfanew fields. */ |
| 629 | *is_dos_app = TRUE; |
| 630 | } |
| 631 | else if (nt_header->Signature != IMAGE_NT_SIGNATURE |
| 632 | && LOWORD (nt_header->Signature) != IMAGE_OS2_SIGNATURE) |
| 633 | { |
| 634 | *is_dos_app = TRUE; |
| 635 | } |
| 636 | else if (nt_header->Signature == IMAGE_NT_SIGNATURE) |
| 637 | { |
| 638 | /* Look for cygwin.dll in DLL import list. */ |
| 639 | IMAGE_DATA_DIRECTORY import_dir = |
| 640 | nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT]; |
| 641 | IMAGE_IMPORT_DESCRIPTOR * imports; |
| 642 | IMAGE_SECTION_HEADER * section; |
| 643 | |
| 644 | section = rva_to_section (import_dir.VirtualAddress, nt_header); |
| 645 | imports = RVA_TO_PTR (import_dir.VirtualAddress, section, executable); |
| 646 | |
| 647 | for ( ; imports->Name; imports++) |
| 648 | { |
| 649 | char * dllname = RVA_TO_PTR (imports->Name, section, executable); |
| 650 | |
| 651 | /* The exact name of the cygwin dll has changed with |
| 652 | various releases, but hopefully this will be reasonably |
| 653 | future proof. */ |
| 654 | if (strncmp (dllname, "cygwin", 6) == 0) |
| 655 | { |
| 656 | *is_cygnus_app = TRUE; |
| 657 | break; |
| 658 | } |
| 659 | } |
| 660 | |
| 661 | /* Check whether app is marked as a console or windowed (aka |
| 662 | GUI) app. Accept Posix and OS2 subsytem apps as console |
| 663 | apps. */ |
| 664 | *is_gui_app = (nt_header->OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_GUI); |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | unwind: |
| 669 | close_file_data (&executable); |
| 670 | } |
| 671 | |
| 672 | int |
| 673 | compare_env (const void *strp1, const void *strp2) |
| 674 | { |
| 675 | const char *str1 = *(const char **)strp1, *str2 = *(const char **)strp2; |
| 676 | |
| 677 | while (*str1 && *str2 && *str1 != '=' && *str2 != '=') |
| 678 | { |
| 679 | /* Sort order in command.com/cmd.exe is based on uppercasing |
| 680 | names, so do the same here. */ |
| 681 | if (toupper (*str1) > toupper (*str2)) |
| 682 | return 1; |
| 683 | else if (toupper (*str1) < toupper (*str2)) |
| 684 | return -1; |
| 685 | str1++, str2++; |
| 686 | } |
| 687 | |
| 688 | if (*str1 == '=' && *str2 == '=') |
| 689 | return 0; |
| 690 | else if (*str1 == '=') |
| 691 | return -1; |
| 692 | else |
| 693 | return 1; |
| 694 | } |
| 695 | |
| 696 | void |
| 697 | merge_and_sort_env (char **envp1, char **envp2, char **new_envp) |
| 698 | { |
| 699 | char **optr, **nptr; |
| 700 | int num; |
| 701 | |
| 702 | nptr = new_envp; |
| 703 | optr = envp1; |
| 704 | while (*optr) |
| 705 | *nptr++ = *optr++; |
| 706 | num = optr - envp1; |
| 707 | |
| 708 | optr = envp2; |
| 709 | while (*optr) |
| 710 | *nptr++ = *optr++; |
| 711 | num += optr - envp2; |
| 712 | |
| 713 | qsort (new_envp, num, sizeof (char *), compare_env); |
| 714 | |
| 715 | *nptr = NULL; |
| 716 | } |
| 717 | |
| 718 | /* When a new child process is created we need to register it in our list, |
| 719 | so intercept spawn requests. */ |
| 720 | int |
| 721 | sys_spawnve (int mode, char *cmdname, char **argv, char **envp) |
| 722 | { |
| 723 | Lisp_Object program, full; |
| 724 | char *cmdline, *env, *parg, **targ; |
| 725 | int arglen, numenv; |
| 726 | int pid; |
| 727 | child_process *cp; |
| 728 | int is_dos_app, is_cygnus_app, is_gui_app; |
| 729 | int do_quoting = 0; |
| 730 | char escape_char; |
| 731 | /* We pass our process ID to our children by setting up an environment |
| 732 | variable in their environment. */ |
| 733 | char ppid_env_var_buffer[64]; |
| 734 | char *extra_env[] = {ppid_env_var_buffer, NULL}; |
| 735 | char *sepchars = " \t"; |
| 736 | |
| 737 | /* We don't care about the other modes */ |
| 738 | if (mode != _P_NOWAIT) |
| 739 | { |
| 740 | errno = EINVAL; |
| 741 | return -1; |
| 742 | } |
| 743 | |
| 744 | /* Handle executable names without an executable suffix. */ |
| 745 | program = make_string (cmdname, strlen (cmdname)); |
| 746 | if (NILP (Ffile_executable_p (program))) |
| 747 | { |
| 748 | struct gcpro gcpro1; |
| 749 | |
| 750 | full = Qnil; |
| 751 | GCPRO1 (program); |
| 752 | openp (Vexec_path, program, Vexec_suffixes, &full, make_number (X_OK)); |
| 753 | UNGCPRO; |
| 754 | if (NILP (full)) |
| 755 | { |
| 756 | errno = EINVAL; |
| 757 | return -1; |
| 758 | } |
| 759 | program = full; |
| 760 | } |
| 761 | |
| 762 | /* make sure argv[0] and cmdname are both in DOS format */ |
| 763 | cmdname = SDATA (program); |
| 764 | unixtodos_filename (cmdname); |
| 765 | argv[0] = cmdname; |
| 766 | |
| 767 | /* Determine whether program is a 16-bit DOS executable, or a w32 |
| 768 | executable that is implicitly linked to the Cygnus dll (implying it |
| 769 | was compiled with the Cygnus GNU toolchain and hence relies on |
| 770 | cygwin.dll to parse the command line - we use this to decide how to |
| 771 | escape quote chars in command line args that must be quoted). |
| 772 | |
| 773 | Also determine whether it is a GUI app, so that we don't hide its |
| 774 | initial window unless specifically requested. */ |
| 775 | w32_executable_type (cmdname, &is_dos_app, &is_cygnus_app, &is_gui_app); |
| 776 | |
| 777 | /* On Windows 95, if cmdname is a DOS app, we invoke a helper |
| 778 | application to start it by specifying the helper app as cmdname, |
| 779 | while leaving the real app name as argv[0]. */ |
| 780 | if (is_dos_app) |
| 781 | { |
| 782 | cmdname = alloca (MAXPATHLEN); |
| 783 | if (egetenv ("CMDPROXY")) |
| 784 | strcpy (cmdname, egetenv ("CMDPROXY")); |
| 785 | else |
| 786 | { |
| 787 | strcpy (cmdname, SDATA (Vinvocation_directory)); |
| 788 | strcat (cmdname, "cmdproxy.exe"); |
| 789 | } |
| 790 | unixtodos_filename (cmdname); |
| 791 | } |
| 792 | |
| 793 | /* we have to do some conjuring here to put argv and envp into the |
| 794 | form CreateProcess wants... argv needs to be a space separated/null |
| 795 | terminated list of parameters, and envp is a null |
| 796 | separated/double-null terminated list of parameters. |
| 797 | |
| 798 | Additionally, zero-length args and args containing whitespace or |
| 799 | quote chars need to be wrapped in double quotes - for this to work, |
| 800 | embedded quotes need to be escaped as well. The aim is to ensure |
| 801 | the child process reconstructs the argv array we start with |
| 802 | exactly, so we treat quotes at the beginning and end of arguments |
| 803 | as embedded quotes. |
| 804 | |
| 805 | The w32 GNU-based library from Cygnus doubles quotes to escape |
| 806 | them, while MSVC uses backslash for escaping. (Actually the MSVC |
| 807 | startup code does attempt to recognise doubled quotes and accept |
| 808 | them, but gets it wrong and ends up requiring three quotes to get a |
| 809 | single embedded quote!) So by default we decide whether to use |
| 810 | quote or backslash as the escape character based on whether the |
| 811 | binary is apparently a Cygnus compiled app. |
| 812 | |
| 813 | Note that using backslash to escape embedded quotes requires |
| 814 | additional special handling if an embedded quote is already |
| 815 | preceeded by backslash, or if an arg requiring quoting ends with |
| 816 | backslash. In such cases, the run of escape characters needs to be |
| 817 | doubled. For consistency, we apply this special handling as long |
| 818 | as the escape character is not quote. |
| 819 | |
| 820 | Since we have no idea how large argv and envp are likely to be we |
| 821 | figure out list lengths on the fly and allocate them. */ |
| 822 | |
| 823 | if (!NILP (Vw32_quote_process_args)) |
| 824 | { |
| 825 | do_quoting = 1; |
| 826 | /* Override escape char by binding w32-quote-process-args to |
| 827 | desired character, or use t for auto-selection. */ |
| 828 | if (INTEGERP (Vw32_quote_process_args)) |
| 829 | escape_char = XINT (Vw32_quote_process_args); |
| 830 | else |
| 831 | escape_char = is_cygnus_app ? '"' : '\\'; |
| 832 | } |
| 833 | |
| 834 | /* Cygwin apps needs quoting a bit more often */ |
| 835 | if (escape_char == '"') |
| 836 | sepchars = "\r\n\t\f '"; |
| 837 | |
| 838 | /* do argv... */ |
| 839 | arglen = 0; |
| 840 | targ = argv; |
| 841 | while (*targ) |
| 842 | { |
| 843 | char * p = *targ; |
| 844 | int need_quotes = 0; |
| 845 | int escape_char_run = 0; |
| 846 | |
| 847 | if (*p == 0) |
| 848 | need_quotes = 1; |
| 849 | for ( ; *p; p++) |
| 850 | { |
| 851 | if (escape_char == '"' && *p == '\\') |
| 852 | /* If it's a Cygwin app, \ needs to be escaped. */ |
| 853 | arglen++; |
| 854 | else if (*p == '"') |
| 855 | { |
| 856 | /* allow for embedded quotes to be escaped */ |
| 857 | arglen++; |
| 858 | need_quotes = 1; |
| 859 | /* handle the case where the embedded quote is already escaped */ |
| 860 | if (escape_char_run > 0) |
| 861 | { |
| 862 | /* To preserve the arg exactly, we need to double the |
| 863 | preceding escape characters (plus adding one to |
| 864 | escape the quote character itself). */ |
| 865 | arglen += escape_char_run; |
| 866 | } |
| 867 | } |
| 868 | else if (strchr (sepchars, *p) != NULL) |
| 869 | { |
| 870 | need_quotes = 1; |
| 871 | } |
| 872 | |
| 873 | if (*p == escape_char && escape_char != '"') |
| 874 | escape_char_run++; |
| 875 | else |
| 876 | escape_char_run = 0; |
| 877 | } |
| 878 | if (need_quotes) |
| 879 | { |
| 880 | arglen += 2; |
| 881 | /* handle the case where the arg ends with an escape char - we |
| 882 | must not let the enclosing quote be escaped. */ |
| 883 | if (escape_char_run > 0) |
| 884 | arglen += escape_char_run; |
| 885 | } |
| 886 | arglen += strlen (*targ++) + 1; |
| 887 | } |
| 888 | cmdline = alloca (arglen); |
| 889 | targ = argv; |
| 890 | parg = cmdline; |
| 891 | while (*targ) |
| 892 | { |
| 893 | char * p = *targ; |
| 894 | int need_quotes = 0; |
| 895 | |
| 896 | if (*p == 0) |
| 897 | need_quotes = 1; |
| 898 | |
| 899 | if (do_quoting) |
| 900 | { |
| 901 | for ( ; *p; p++) |
| 902 | if ((strchr (sepchars, *p) != NULL) || *p == '"') |
| 903 | need_quotes = 1; |
| 904 | } |
| 905 | if (need_quotes) |
| 906 | { |
| 907 | int escape_char_run = 0; |
| 908 | char * first; |
| 909 | char * last; |
| 910 | |
| 911 | p = *targ; |
| 912 | first = p; |
| 913 | last = p + strlen (p) - 1; |
| 914 | *parg++ = '"'; |
| 915 | #if 0 |
| 916 | /* This version does not escape quotes if they occur at the |
| 917 | beginning or end of the arg - this could lead to incorrect |
| 918 | behaviour when the arg itself represents a command line |
| 919 | containing quoted args. I believe this was originally done |
| 920 | as a hack to make some things work, before |
| 921 | `w32-quote-process-args' was added. */ |
| 922 | while (*p) |
| 923 | { |
| 924 | if (*p == '"' && p > first && p < last) |
| 925 | *parg++ = escape_char; /* escape embedded quotes */ |
| 926 | *parg++ = *p++; |
| 927 | } |
| 928 | #else |
| 929 | for ( ; *p; p++) |
| 930 | { |
| 931 | if (*p == '"') |
| 932 | { |
| 933 | /* double preceding escape chars if any */ |
| 934 | while (escape_char_run > 0) |
| 935 | { |
| 936 | *parg++ = escape_char; |
| 937 | escape_char_run--; |
| 938 | } |
| 939 | /* escape all quote chars, even at beginning or end */ |
| 940 | *parg++ = escape_char; |
| 941 | } |
| 942 | else if (escape_char == '"' && *p == '\\') |
| 943 | *parg++ = '\\'; |
| 944 | *parg++ = *p; |
| 945 | |
| 946 | if (*p == escape_char && escape_char != '"') |
| 947 | escape_char_run++; |
| 948 | else |
| 949 | escape_char_run = 0; |
| 950 | } |
| 951 | /* double escape chars before enclosing quote */ |
| 952 | while (escape_char_run > 0) |
| 953 | { |
| 954 | *parg++ = escape_char; |
| 955 | escape_char_run--; |
| 956 | } |
| 957 | #endif |
| 958 | *parg++ = '"'; |
| 959 | } |
| 960 | else |
| 961 | { |
| 962 | strcpy (parg, *targ); |
| 963 | parg += strlen (*targ); |
| 964 | } |
| 965 | *parg++ = ' '; |
| 966 | targ++; |
| 967 | } |
| 968 | *--parg = '\0'; |
| 969 | |
| 970 | /* and envp... */ |
| 971 | arglen = 1; |
| 972 | targ = envp; |
| 973 | numenv = 1; /* for end null */ |
| 974 | while (*targ) |
| 975 | { |
| 976 | arglen += strlen (*targ++) + 1; |
| 977 | numenv++; |
| 978 | } |
| 979 | /* extra env vars... */ |
| 980 | sprintf (ppid_env_var_buffer, "EM_PARENT_PROCESS_ID=%d", |
| 981 | GetCurrentProcessId ()); |
| 982 | arglen += strlen (ppid_env_var_buffer) + 1; |
| 983 | numenv++; |
| 984 | |
| 985 | /* merge env passed in and extra env into one, and sort it. */ |
| 986 | targ = (char **) alloca (numenv * sizeof (char *)); |
| 987 | merge_and_sort_env (envp, extra_env, targ); |
| 988 | |
| 989 | /* concatenate env entries. */ |
| 990 | env = alloca (arglen); |
| 991 | parg = env; |
| 992 | while (*targ) |
| 993 | { |
| 994 | strcpy (parg, *targ); |
| 995 | parg += strlen (*targ++); |
| 996 | *parg++ = '\0'; |
| 997 | } |
| 998 | *parg++ = '\0'; |
| 999 | *parg = '\0'; |
| 1000 | |
| 1001 | cp = new_child (); |
| 1002 | if (cp == NULL) |
| 1003 | { |
| 1004 | errno = EAGAIN; |
| 1005 | return -1; |
| 1006 | } |
| 1007 | |
| 1008 | /* Now create the process. */ |
| 1009 | if (!create_child (cmdname, cmdline, env, is_gui_app, &pid, cp)) |
| 1010 | { |
| 1011 | delete_child (cp); |
| 1012 | errno = ENOEXEC; |
| 1013 | return -1; |
| 1014 | } |
| 1015 | |
| 1016 | return pid; |
| 1017 | } |
| 1018 | |
| 1019 | /* Emulate the select call |
| 1020 | Wait for available input on any of the given rfds, or timeout if |
| 1021 | a timeout is given and no input is detected |
| 1022 | wfds and efds are not supported and must be NULL. |
| 1023 | |
| 1024 | For simplicity, we detect the death of child processes here and |
| 1025 | synchronously call the SIGCHLD handler. Since it is possible for |
| 1026 | children to be created without a corresponding pipe handle from which |
| 1027 | to read output, we wait separately on the process handles as well as |
| 1028 | the char_avail events for each process pipe. We only call |
| 1029 | wait/reap_process when the process actually terminates. |
| 1030 | |
| 1031 | To reduce the number of places in which Emacs can be hung such that |
| 1032 | C-g is not able to interrupt it, we always wait on interrupt_handle |
| 1033 | (which is signalled by the input thread when C-g is detected). If we |
| 1034 | detect that we were woken up by C-g, we return -1 with errno set to |
| 1035 | EINTR as on Unix. */ |
| 1036 | |
| 1037 | /* From ntterm.c */ |
| 1038 | extern HANDLE keyboard_handle; |
| 1039 | |
| 1040 | /* From w32xfns.c */ |
| 1041 | extern HANDLE interrupt_handle; |
| 1042 | |
| 1043 | /* From process.c */ |
| 1044 | extern int proc_buffered_char[]; |
| 1045 | |
| 1046 | int |
| 1047 | sys_select (int nfds, SELECT_TYPE *rfds, SELECT_TYPE *wfds, SELECT_TYPE *efds, |
| 1048 | EMACS_TIME *timeout) |
| 1049 | { |
| 1050 | SELECT_TYPE orfds; |
| 1051 | DWORD timeout_ms, start_time; |
| 1052 | int i, nh, nc, nr; |
| 1053 | DWORD active; |
| 1054 | child_process *cp, *cps[MAX_CHILDREN]; |
| 1055 | HANDLE wait_hnd[MAXDESC + MAX_CHILDREN]; |
| 1056 | int fdindex[MAXDESC]; /* mapping from wait handles back to descriptors */ |
| 1057 | |
| 1058 | timeout_ms = timeout ? (timeout->tv_sec * 1000 + timeout->tv_usec / 1000) : INFINITE; |
| 1059 | |
| 1060 | /* If the descriptor sets are NULL but timeout isn't, then just Sleep. */ |
| 1061 | if (rfds == NULL && wfds == NULL && efds == NULL && timeout != NULL) |
| 1062 | { |
| 1063 | Sleep (timeout_ms); |
| 1064 | return 0; |
| 1065 | } |
| 1066 | |
| 1067 | /* Otherwise, we only handle rfds, so fail otherwise. */ |
| 1068 | if (rfds == NULL || wfds != NULL || efds != NULL) |
| 1069 | { |
| 1070 | errno = EINVAL; |
| 1071 | return -1; |
| 1072 | } |
| 1073 | |
| 1074 | orfds = *rfds; |
| 1075 | FD_ZERO (rfds); |
| 1076 | nr = 0; |
| 1077 | |
| 1078 | /* Always wait on interrupt_handle, to detect C-g (quit). */ |
| 1079 | wait_hnd[0] = interrupt_handle; |
| 1080 | fdindex[0] = -1; |
| 1081 | |
| 1082 | /* Build a list of pipe handles to wait on. */ |
| 1083 | nh = 1; |
| 1084 | for (i = 0; i < nfds; i++) |
| 1085 | if (FD_ISSET (i, &orfds)) |
| 1086 | { |
| 1087 | if (i == 0) |
| 1088 | { |
| 1089 | if (keyboard_handle) |
| 1090 | { |
| 1091 | /* Handle stdin specially */ |
| 1092 | wait_hnd[nh] = keyboard_handle; |
| 1093 | fdindex[nh] = i; |
| 1094 | nh++; |
| 1095 | } |
| 1096 | |
| 1097 | /* Check for any emacs-generated input in the queue since |
| 1098 | it won't be detected in the wait */ |
| 1099 | if (detect_input_pending ()) |
| 1100 | { |
| 1101 | FD_SET (i, rfds); |
| 1102 | return 1; |
| 1103 | } |
| 1104 | } |
| 1105 | else |
| 1106 | { |
| 1107 | /* Child process and socket input */ |
| 1108 | cp = fd_info[i].cp; |
| 1109 | if (cp) |
| 1110 | { |
| 1111 | int current_status = cp->status; |
| 1112 | |
| 1113 | if (current_status == STATUS_READ_ACKNOWLEDGED) |
| 1114 | { |
| 1115 | /* Tell reader thread which file handle to use. */ |
| 1116 | cp->fd = i; |
| 1117 | /* Wake up the reader thread for this process */ |
| 1118 | cp->status = STATUS_READ_READY; |
| 1119 | if (!SetEvent (cp->char_consumed)) |
| 1120 | DebPrint (("nt_select.SetEvent failed with " |
| 1121 | "%lu for fd %ld\n", GetLastError (), i)); |
| 1122 | } |
| 1123 | |
| 1124 | #ifdef CHECK_INTERLOCK |
| 1125 | /* slightly crude cross-checking of interlock between threads */ |
| 1126 | |
| 1127 | current_status = cp->status; |
| 1128 | if (WaitForSingleObject (cp->char_avail, 0) == WAIT_OBJECT_0) |
| 1129 | { |
| 1130 | /* char_avail has been signalled, so status (which may |
| 1131 | have changed) should indicate read has completed |
| 1132 | but has not been acknowledged. */ |
| 1133 | current_status = cp->status; |
| 1134 | if (current_status != STATUS_READ_SUCCEEDED |
| 1135 | && current_status != STATUS_READ_FAILED) |
| 1136 | DebPrint (("char_avail set, but read not completed: status %d\n", |
| 1137 | current_status)); |
| 1138 | } |
| 1139 | else |
| 1140 | { |
| 1141 | /* char_avail has not been signalled, so status should |
| 1142 | indicate that read is in progress; small possibility |
| 1143 | that read has completed but event wasn't yet signalled |
| 1144 | when we tested it (because a context switch occurred |
| 1145 | or if running on separate CPUs). */ |
| 1146 | if (current_status != STATUS_READ_READY |
| 1147 | && current_status != STATUS_READ_IN_PROGRESS |
| 1148 | && current_status != STATUS_READ_SUCCEEDED |
| 1149 | && current_status != STATUS_READ_FAILED) |
| 1150 | DebPrint (("char_avail reset, but read status is bad: %d\n", |
| 1151 | current_status)); |
| 1152 | } |
| 1153 | #endif |
| 1154 | wait_hnd[nh] = cp->char_avail; |
| 1155 | fdindex[nh] = i; |
| 1156 | if (!wait_hnd[nh]) abort (); |
| 1157 | nh++; |
| 1158 | #ifdef FULL_DEBUG |
| 1159 | DebPrint (("select waiting on child %d fd %d\n", |
| 1160 | cp-child_procs, i)); |
| 1161 | #endif |
| 1162 | } |
| 1163 | else |
| 1164 | { |
| 1165 | /* Unable to find something to wait on for this fd, skip */ |
| 1166 | |
| 1167 | /* Note that this is not a fatal error, and can in fact |
| 1168 | happen in unusual circumstances. Specifically, if |
| 1169 | sys_spawnve fails, eg. because the program doesn't |
| 1170 | exist, and debug-on-error is t so Fsignal invokes a |
| 1171 | nested input loop, then the process output pipe is |
| 1172 | still included in input_wait_mask with no child_proc |
| 1173 | associated with it. (It is removed when the debugger |
| 1174 | exits the nested input loop and the error is thrown.) */ |
| 1175 | |
| 1176 | DebPrint (("sys_select: fd %ld is invalid! ignoring\n", i)); |
| 1177 | } |
| 1178 | } |
| 1179 | } |
| 1180 | |
| 1181 | count_children: |
| 1182 | /* Add handles of child processes. */ |
| 1183 | nc = 0; |
| 1184 | for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--) |
| 1185 | /* Some child_procs might be sockets; ignore them. Also some |
| 1186 | children may have died already, but we haven't finished reading |
| 1187 | the process output; ignore them too. */ |
| 1188 | if (CHILD_ACTIVE (cp) && cp->procinfo.hProcess |
| 1189 | && (cp->fd < 0 |
| 1190 | || (fd_info[cp->fd].flags & FILE_SEND_SIGCHLD) == 0 |
| 1191 | || (fd_info[cp->fd].flags & FILE_AT_EOF) != 0) |
| 1192 | ) |
| 1193 | { |
| 1194 | wait_hnd[nh + nc] = cp->procinfo.hProcess; |
| 1195 | cps[nc] = cp; |
| 1196 | nc++; |
| 1197 | } |
| 1198 | |
| 1199 | /* Nothing to look for, so we didn't find anything */ |
| 1200 | if (nh + nc == 0) |
| 1201 | { |
| 1202 | if (timeout) |
| 1203 | Sleep (timeout_ms); |
| 1204 | return 0; |
| 1205 | } |
| 1206 | |
| 1207 | start_time = GetTickCount (); |
| 1208 | |
| 1209 | /* Wait for input or child death to be signalled. If user input is |
| 1210 | allowed, then also accept window messages. */ |
| 1211 | if (FD_ISSET (0, &orfds)) |
| 1212 | active = MsgWaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms, |
| 1213 | QS_ALLINPUT); |
| 1214 | else |
| 1215 | active = WaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms); |
| 1216 | |
| 1217 | if (active == WAIT_FAILED) |
| 1218 | { |
| 1219 | DebPrint (("select.WaitForMultipleObjects (%d, %lu) failed with %lu\n", |
| 1220 | nh + nc, timeout_ms, GetLastError ())); |
| 1221 | /* don't return EBADF - this causes wait_reading_process_input to |
| 1222 | abort; WAIT_FAILED is returned when single-stepping under |
| 1223 | Windows 95 after switching thread focus in debugger, and |
| 1224 | possibly at other times. */ |
| 1225 | errno = EINTR; |
| 1226 | return -1; |
| 1227 | } |
| 1228 | else if (active == WAIT_TIMEOUT) |
| 1229 | { |
| 1230 | return 0; |
| 1231 | } |
| 1232 | else if (active >= WAIT_OBJECT_0 |
| 1233 | && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) |
| 1234 | { |
| 1235 | active -= WAIT_OBJECT_0; |
| 1236 | } |
| 1237 | else if (active >= WAIT_ABANDONED_0 |
| 1238 | && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) |
| 1239 | { |
| 1240 | active -= WAIT_ABANDONED_0; |
| 1241 | } |
| 1242 | else |
| 1243 | abort (); |
| 1244 | |
| 1245 | /* Loop over all handles after active (now officially documented as |
| 1246 | being the first signalled handle in the array). We do this to |
| 1247 | ensure fairness, so that all channels with data available will be |
| 1248 | processed - otherwise higher numbered channels could be starved. */ |
| 1249 | do |
| 1250 | { |
| 1251 | if (active == nh + nc) |
| 1252 | { |
| 1253 | /* There are messages in the lisp thread's queue; we must |
| 1254 | drain the queue now to ensure they are processed promptly, |
| 1255 | because if we don't do so, we will not be woken again until |
| 1256 | further messages arrive. |
| 1257 | |
| 1258 | NB. If ever we allow window message procedures to callback |
| 1259 | into lisp, we will need to ensure messages are dispatched |
| 1260 | at a safe time for lisp code to be run (*), and we may also |
| 1261 | want to provide some hooks in the dispatch loop to cater |
| 1262 | for modeless dialogs created by lisp (ie. to register |
| 1263 | window handles to pass to IsDialogMessage). |
| 1264 | |
| 1265 | (*) Note that MsgWaitForMultipleObjects above is an |
| 1266 | internal dispatch point for messages that are sent to |
| 1267 | windows created by this thread. */ |
| 1268 | drain_message_queue (); |
| 1269 | } |
| 1270 | else if (active >= nh) |
| 1271 | { |
| 1272 | cp = cps[active - nh]; |
| 1273 | |
| 1274 | /* We cannot always signal SIGCHLD immediately; if we have not |
| 1275 | finished reading the process output, we must delay sending |
| 1276 | SIGCHLD until we do. */ |
| 1277 | |
| 1278 | if (cp->fd >= 0 && (fd_info[cp->fd].flags & FILE_AT_EOF) == 0) |
| 1279 | fd_info[cp->fd].flags |= FILE_SEND_SIGCHLD; |
| 1280 | /* SIG_DFL for SIGCHLD is ignore */ |
| 1281 | else if (sig_handlers[SIGCHLD] != SIG_DFL && |
| 1282 | sig_handlers[SIGCHLD] != SIG_IGN) |
| 1283 | { |
| 1284 | #ifdef FULL_DEBUG |
| 1285 | DebPrint (("select calling SIGCHLD handler for pid %d\n", |
| 1286 | cp->pid)); |
| 1287 | #endif |
| 1288 | dead_child = cp; |
| 1289 | sig_handlers[SIGCHLD] (SIGCHLD); |
| 1290 | dead_child = NULL; |
| 1291 | } |
| 1292 | } |
| 1293 | else if (fdindex[active] == -1) |
| 1294 | { |
| 1295 | /* Quit (C-g) was detected. */ |
| 1296 | errno = EINTR; |
| 1297 | return -1; |
| 1298 | } |
| 1299 | else if (fdindex[active] == 0) |
| 1300 | { |
| 1301 | /* Keyboard input available */ |
| 1302 | FD_SET (0, rfds); |
| 1303 | nr++; |
| 1304 | } |
| 1305 | else |
| 1306 | { |
| 1307 | /* must be a socket or pipe - read ahead should have |
| 1308 | completed, either succeeding or failing. */ |
| 1309 | FD_SET (fdindex[active], rfds); |
| 1310 | nr++; |
| 1311 | } |
| 1312 | |
| 1313 | /* Even though wait_reading_process_output only reads from at most |
| 1314 | one channel, we must process all channels here so that we reap |
| 1315 | all children that have died. */ |
| 1316 | while (++active < nh + nc) |
| 1317 | if (WaitForSingleObject (wait_hnd[active], 0) == WAIT_OBJECT_0) |
| 1318 | break; |
| 1319 | } while (active < nh + nc); |
| 1320 | |
| 1321 | /* If no input has arrived and timeout hasn't expired, wait again. */ |
| 1322 | if (nr == 0) |
| 1323 | { |
| 1324 | DWORD elapsed = GetTickCount () - start_time; |
| 1325 | |
| 1326 | if (timeout_ms > elapsed) /* INFINITE is MAX_UINT */ |
| 1327 | { |
| 1328 | if (timeout_ms != INFINITE) |
| 1329 | timeout_ms -= elapsed; |
| 1330 | goto count_children; |
| 1331 | } |
| 1332 | } |
| 1333 | |
| 1334 | return nr; |
| 1335 | } |
| 1336 | |
| 1337 | /* Substitute for certain kill () operations */ |
| 1338 | |
| 1339 | static BOOL CALLBACK |
| 1340 | find_child_console (HWND hwnd, LPARAM arg) |
| 1341 | { |
| 1342 | child_process * cp = (child_process *) arg; |
| 1343 | DWORD thread_id; |
| 1344 | DWORD process_id; |
| 1345 | |
| 1346 | thread_id = GetWindowThreadProcessId (hwnd, &process_id); |
| 1347 | if (process_id == cp->procinfo.dwProcessId) |
| 1348 | { |
| 1349 | char window_class[32]; |
| 1350 | |
| 1351 | GetClassName (hwnd, window_class, sizeof (window_class)); |
| 1352 | if (strcmp (window_class, |
| 1353 | (os_subtype == OS_WIN95) |
| 1354 | ? "tty" |
| 1355 | : "ConsoleWindowClass") == 0) |
| 1356 | { |
| 1357 | cp->hwnd = hwnd; |
| 1358 | return FALSE; |
| 1359 | } |
| 1360 | } |
| 1361 | /* keep looking */ |
| 1362 | return TRUE; |
| 1363 | } |
| 1364 | |
| 1365 | int |
| 1366 | sys_kill (int pid, int sig) |
| 1367 | { |
| 1368 | child_process *cp; |
| 1369 | HANDLE proc_hand; |
| 1370 | int need_to_free = 0; |
| 1371 | int rc = 0; |
| 1372 | |
| 1373 | /* Only handle signals that will result in the process dying */ |
| 1374 | if (sig != SIGINT && sig != SIGKILL && sig != SIGQUIT && sig != SIGHUP) |
| 1375 | { |
| 1376 | errno = EINVAL; |
| 1377 | return -1; |
| 1378 | } |
| 1379 | |
| 1380 | cp = find_child_pid (pid); |
| 1381 | if (cp == NULL) |
| 1382 | { |
| 1383 | proc_hand = OpenProcess (PROCESS_TERMINATE, 0, pid); |
| 1384 | if (proc_hand == NULL) |
| 1385 | { |
| 1386 | errno = EPERM; |
| 1387 | return -1; |
| 1388 | } |
| 1389 | need_to_free = 1; |
| 1390 | } |
| 1391 | else |
| 1392 | { |
| 1393 | proc_hand = cp->procinfo.hProcess; |
| 1394 | pid = cp->procinfo.dwProcessId; |
| 1395 | |
| 1396 | /* Try to locate console window for process. */ |
| 1397 | EnumWindows (find_child_console, (LPARAM) cp); |
| 1398 | } |
| 1399 | |
| 1400 | if (sig == SIGINT || sig == SIGQUIT) |
| 1401 | { |
| 1402 | if (NILP (Vw32_start_process_share_console) && cp && cp->hwnd) |
| 1403 | { |
| 1404 | BYTE control_scan_code = (BYTE) MapVirtualKey (VK_CONTROL, 0); |
| 1405 | /* Fake Ctrl-C for SIGINT, and Ctrl-Break for SIGQUIT. */ |
| 1406 | BYTE vk_break_code = (sig == SIGINT) ? 'C' : VK_CANCEL; |
| 1407 | BYTE break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0); |
| 1408 | HWND foreground_window; |
| 1409 | |
| 1410 | if (break_scan_code == 0) |
| 1411 | { |
| 1412 | /* Fake Ctrl-C for SIGQUIT if we can't manage Ctrl-Break. */ |
| 1413 | vk_break_code = 'C'; |
| 1414 | break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0); |
| 1415 | } |
| 1416 | |
| 1417 | foreground_window = GetForegroundWindow (); |
| 1418 | if (foreground_window) |
| 1419 | { |
| 1420 | /* NT 5.0, and apparently also Windows 98, will not allow |
| 1421 | a Window to be set to foreground directly without the |
| 1422 | user's involvement. The workaround is to attach |
| 1423 | ourselves to the thread that owns the foreground |
| 1424 | window, since that is the only thread that can set the |
| 1425 | foreground window. */ |
| 1426 | DWORD foreground_thread, child_thread; |
| 1427 | foreground_thread = |
| 1428 | GetWindowThreadProcessId (foreground_window, NULL); |
| 1429 | if (foreground_thread == GetCurrentThreadId () |
| 1430 | || !AttachThreadInput (GetCurrentThreadId (), |
| 1431 | foreground_thread, TRUE)) |
| 1432 | foreground_thread = 0; |
| 1433 | |
| 1434 | child_thread = GetWindowThreadProcessId (cp->hwnd, NULL); |
| 1435 | if (child_thread == GetCurrentThreadId () |
| 1436 | || !AttachThreadInput (GetCurrentThreadId (), |
| 1437 | child_thread, TRUE)) |
| 1438 | child_thread = 0; |
| 1439 | |
| 1440 | /* Set the foreground window to the child. */ |
| 1441 | if (SetForegroundWindow (cp->hwnd)) |
| 1442 | { |
| 1443 | /* Generate keystrokes as if user had typed Ctrl-Break or |
| 1444 | Ctrl-C. */ |
| 1445 | keybd_event (VK_CONTROL, control_scan_code, 0, 0); |
| 1446 | keybd_event (vk_break_code, break_scan_code, |
| 1447 | (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY), 0); |
| 1448 | keybd_event (vk_break_code, break_scan_code, |
| 1449 | (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY) |
| 1450 | | KEYEVENTF_KEYUP, 0); |
| 1451 | keybd_event (VK_CONTROL, control_scan_code, |
| 1452 | KEYEVENTF_KEYUP, 0); |
| 1453 | |
| 1454 | /* Sleep for a bit to give time for Emacs frame to respond |
| 1455 | to focus change events (if Emacs was active app). */ |
| 1456 | Sleep (100); |
| 1457 | |
| 1458 | SetForegroundWindow (foreground_window); |
| 1459 | } |
| 1460 | /* Detach from the foreground and child threads now that |
| 1461 | the foreground switching is over. */ |
| 1462 | if (foreground_thread) |
| 1463 | AttachThreadInput (GetCurrentThreadId (), |
| 1464 | foreground_thread, FALSE); |
| 1465 | if (child_thread) |
| 1466 | AttachThreadInput (GetCurrentThreadId (), |
| 1467 | child_thread, FALSE); |
| 1468 | } |
| 1469 | } |
| 1470 | /* Ctrl-Break is NT equivalent of SIGINT. */ |
| 1471 | else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid)) |
| 1472 | { |
| 1473 | DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d " |
| 1474 | "for pid %lu\n", GetLastError (), pid)); |
| 1475 | errno = EINVAL; |
| 1476 | rc = -1; |
| 1477 | } |
| 1478 | } |
| 1479 | else |
| 1480 | { |
| 1481 | if (NILP (Vw32_start_process_share_console) && cp && cp->hwnd) |
| 1482 | { |
| 1483 | #if 1 |
| 1484 | if (os_subtype == OS_WIN95) |
| 1485 | { |
| 1486 | /* |
| 1487 | Another possibility is to try terminating the VDM out-right by |
| 1488 | calling the Shell VxD (id 0x17) V86 interface, function #4 |
| 1489 | "SHELL_Destroy_VM", ie. |
| 1490 | |
| 1491 | mov edx,4 |
| 1492 | mov ebx,vm_handle |
| 1493 | call shellapi |
| 1494 | |
| 1495 | First need to determine the current VM handle, and then arrange for |
| 1496 | the shellapi call to be made from the system vm (by using |
| 1497 | Switch_VM_and_callback). |
| 1498 | |
| 1499 | Could try to invoke DestroyVM through CallVxD. |
| 1500 | |
| 1501 | */ |
| 1502 | #if 0 |
| 1503 | /* On Win95, posting WM_QUIT causes the 16-bit subsystem |
| 1504 | to hang when cmdproxy is used in conjunction with |
| 1505 | command.com for an interactive shell. Posting |
| 1506 | WM_CLOSE pops up a dialog that, when Yes is selected, |
| 1507 | does the same thing. TerminateProcess is also less |
| 1508 | than ideal in that subprocesses tend to stick around |
| 1509 | until the machine is shutdown, but at least it |
| 1510 | doesn't freeze the 16-bit subsystem. */ |
| 1511 | PostMessage (cp->hwnd, WM_QUIT, 0xff, 0); |
| 1512 | #endif |
| 1513 | if (!TerminateProcess (proc_hand, 0xff)) |
| 1514 | { |
| 1515 | DebPrint (("sys_kill.TerminateProcess returned %d " |
| 1516 | "for pid %lu\n", GetLastError (), pid)); |
| 1517 | errno = EINVAL; |
| 1518 | rc = -1; |
| 1519 | } |
| 1520 | } |
| 1521 | else |
| 1522 | #endif |
| 1523 | PostMessage (cp->hwnd, WM_CLOSE, 0, 0); |
| 1524 | } |
| 1525 | /* Kill the process. On W32 this doesn't kill child processes |
| 1526 | so it doesn't work very well for shells which is why it's not |
| 1527 | used in every case. */ |
| 1528 | else if (!TerminateProcess (proc_hand, 0xff)) |
| 1529 | { |
| 1530 | DebPrint (("sys_kill.TerminateProcess returned %d " |
| 1531 | "for pid %lu\n", GetLastError (), pid)); |
| 1532 | errno = EINVAL; |
| 1533 | rc = -1; |
| 1534 | } |
| 1535 | } |
| 1536 | |
| 1537 | if (need_to_free) |
| 1538 | CloseHandle (proc_hand); |
| 1539 | |
| 1540 | return rc; |
| 1541 | } |
| 1542 | |
| 1543 | /* extern int report_file_error (char *, Lisp_Object); */ |
| 1544 | |
| 1545 | /* The following two routines are used to manipulate stdin, stdout, and |
| 1546 | stderr of our child processes. |
| 1547 | |
| 1548 | Assuming that in, out, and err are *not* inheritable, we make them |
| 1549 | stdin, stdout, and stderr of the child as follows: |
| 1550 | |
| 1551 | - Save the parent's current standard handles. |
| 1552 | - Set the std handles to inheritable duplicates of the ones being passed in. |
| 1553 | (Note that _get_osfhandle() is an io.h procedure that retrieves the |
| 1554 | NT file handle for a crt file descriptor.) |
| 1555 | - Spawn the child, which inherits in, out, and err as stdin, |
| 1556 | stdout, and stderr. (see Spawnve) |
| 1557 | - Close the std handles passed to the child. |
| 1558 | - Reset the parent's standard handles to the saved handles. |
| 1559 | (see reset_standard_handles) |
| 1560 | We assume that the caller closes in, out, and err after calling us. */ |
| 1561 | |
| 1562 | void |
| 1563 | prepare_standard_handles (int in, int out, int err, HANDLE handles[3]) |
| 1564 | { |
| 1565 | HANDLE parent; |
| 1566 | HANDLE newstdin, newstdout, newstderr; |
| 1567 | |
| 1568 | parent = GetCurrentProcess (); |
| 1569 | |
| 1570 | handles[0] = GetStdHandle (STD_INPUT_HANDLE); |
| 1571 | handles[1] = GetStdHandle (STD_OUTPUT_HANDLE); |
| 1572 | handles[2] = GetStdHandle (STD_ERROR_HANDLE); |
| 1573 | |
| 1574 | /* make inheritable copies of the new handles */ |
| 1575 | if (!DuplicateHandle (parent, |
| 1576 | (HANDLE) _get_osfhandle (in), |
| 1577 | parent, |
| 1578 | &newstdin, |
| 1579 | 0, |
| 1580 | TRUE, |
| 1581 | DUPLICATE_SAME_ACCESS)) |
| 1582 | report_file_error ("Duplicating input handle for child", Qnil); |
| 1583 | |
| 1584 | if (!DuplicateHandle (parent, |
| 1585 | (HANDLE) _get_osfhandle (out), |
| 1586 | parent, |
| 1587 | &newstdout, |
| 1588 | 0, |
| 1589 | TRUE, |
| 1590 | DUPLICATE_SAME_ACCESS)) |
| 1591 | report_file_error ("Duplicating output handle for child", Qnil); |
| 1592 | |
| 1593 | if (!DuplicateHandle (parent, |
| 1594 | (HANDLE) _get_osfhandle (err), |
| 1595 | parent, |
| 1596 | &newstderr, |
| 1597 | 0, |
| 1598 | TRUE, |
| 1599 | DUPLICATE_SAME_ACCESS)) |
| 1600 | report_file_error ("Duplicating error handle for child", Qnil); |
| 1601 | |
| 1602 | /* and store them as our std handles */ |
| 1603 | if (!SetStdHandle (STD_INPUT_HANDLE, newstdin)) |
| 1604 | report_file_error ("Changing stdin handle", Qnil); |
| 1605 | |
| 1606 | if (!SetStdHandle (STD_OUTPUT_HANDLE, newstdout)) |
| 1607 | report_file_error ("Changing stdout handle", Qnil); |
| 1608 | |
| 1609 | if (!SetStdHandle (STD_ERROR_HANDLE, newstderr)) |
| 1610 | report_file_error ("Changing stderr handle", Qnil); |
| 1611 | } |
| 1612 | |
| 1613 | void |
| 1614 | reset_standard_handles (int in, int out, int err, HANDLE handles[3]) |
| 1615 | { |
| 1616 | /* close the duplicated handles passed to the child */ |
| 1617 | CloseHandle (GetStdHandle (STD_INPUT_HANDLE)); |
| 1618 | CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE)); |
| 1619 | CloseHandle (GetStdHandle (STD_ERROR_HANDLE)); |
| 1620 | |
| 1621 | /* now restore parent's saved std handles */ |
| 1622 | SetStdHandle (STD_INPUT_HANDLE, handles[0]); |
| 1623 | SetStdHandle (STD_OUTPUT_HANDLE, handles[1]); |
| 1624 | SetStdHandle (STD_ERROR_HANDLE, handles[2]); |
| 1625 | } |
| 1626 | |
| 1627 | void |
| 1628 | set_process_dir (char * dir) |
| 1629 | { |
| 1630 | process_dir = dir; |
| 1631 | } |
| 1632 | |
| 1633 | #ifdef HAVE_SOCKETS |
| 1634 | |
| 1635 | /* To avoid problems with winsock implementations that work over dial-up |
| 1636 | connections causing or requiring a connection to exist while Emacs is |
| 1637 | running, Emacs no longer automatically loads winsock on startup if it |
| 1638 | is present. Instead, it will be loaded when open-network-stream is |
| 1639 | first called. |
| 1640 | |
| 1641 | To allow full control over when winsock is loaded, we provide these |
| 1642 | two functions to dynamically load and unload winsock. This allows |
| 1643 | dial-up users to only be connected when they actually need to use |
| 1644 | socket services. */ |
| 1645 | |
| 1646 | /* From nt.c */ |
| 1647 | extern HANDLE winsock_lib; |
| 1648 | extern BOOL term_winsock (void); |
| 1649 | extern BOOL init_winsock (int load_now); |
| 1650 | |
| 1651 | extern Lisp_Object Vsystem_name; |
| 1652 | |
| 1653 | DEFUN ("w32-has-winsock", Fw32_has_winsock, Sw32_has_winsock, 0, 1, 0, |
| 1654 | doc: /* Test for presence of the Windows socket library `winsock'. |
| 1655 | Returns non-nil if winsock support is present, nil otherwise. |
| 1656 | |
| 1657 | If the optional argument LOAD-NOW is non-nil, the winsock library is |
| 1658 | also loaded immediately if not already loaded. If winsock is loaded, |
| 1659 | the winsock local hostname is returned (since this may be different from |
| 1660 | the value of `system-name' and should supplant it), otherwise t is |
| 1661 | returned to indicate winsock support is present. */) |
| 1662 | (load_now) |
| 1663 | Lisp_Object load_now; |
| 1664 | { |
| 1665 | int have_winsock; |
| 1666 | |
| 1667 | have_winsock = init_winsock (!NILP (load_now)); |
| 1668 | if (have_winsock) |
| 1669 | { |
| 1670 | if (winsock_lib != NULL) |
| 1671 | { |
| 1672 | /* Return new value for system-name. The best way to do this |
| 1673 | is to call init_system_name, saving and restoring the |
| 1674 | original value to avoid side-effects. */ |
| 1675 | Lisp_Object orig_hostname = Vsystem_name; |
| 1676 | Lisp_Object hostname; |
| 1677 | |
| 1678 | init_system_name (); |
| 1679 | hostname = Vsystem_name; |
| 1680 | Vsystem_name = orig_hostname; |
| 1681 | return hostname; |
| 1682 | } |
| 1683 | return Qt; |
| 1684 | } |
| 1685 | return Qnil; |
| 1686 | } |
| 1687 | |
| 1688 | DEFUN ("w32-unload-winsock", Fw32_unload_winsock, Sw32_unload_winsock, |
| 1689 | 0, 0, 0, |
| 1690 | doc: /* Unload the Windows socket library `winsock' if loaded. |
| 1691 | This is provided to allow dial-up socket connections to be disconnected |
| 1692 | when no longer needed. Returns nil without unloading winsock if any |
| 1693 | socket connections still exist. */) |
| 1694 | () |
| 1695 | { |
| 1696 | return term_winsock () ? Qt : Qnil; |
| 1697 | } |
| 1698 | |
| 1699 | #endif /* HAVE_SOCKETS */ |
| 1700 | |
| 1701 | \f |
| 1702 | /* Some miscellaneous functions that are Windows specific, but not GUI |
| 1703 | specific (ie. are applicable in terminal or batch mode as well). */ |
| 1704 | |
| 1705 | /* lifted from fileio.c */ |
| 1706 | #define CORRECT_DIR_SEPS(s) \ |
| 1707 | do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \ |
| 1708 | else unixtodos_filename (s); \ |
| 1709 | } while (0) |
| 1710 | |
| 1711 | DEFUN ("w32-short-file-name", Fw32_short_file_name, Sw32_short_file_name, 1, 1, 0, |
| 1712 | doc: /* Return the short file name version (8.3) of the full path of FILENAME. |
| 1713 | If FILENAME does not exist, return nil. |
| 1714 | All path elements in FILENAME are converted to their short names. */) |
| 1715 | (filename) |
| 1716 | Lisp_Object filename; |
| 1717 | { |
| 1718 | char shortname[MAX_PATH]; |
| 1719 | |
| 1720 | CHECK_STRING (filename); |
| 1721 | |
| 1722 | /* first expand it. */ |
| 1723 | filename = Fexpand_file_name (filename, Qnil); |
| 1724 | |
| 1725 | /* luckily, this returns the short version of each element in the path. */ |
| 1726 | if (GetShortPathName (SDATA (filename), shortname, MAX_PATH) == 0) |
| 1727 | return Qnil; |
| 1728 | |
| 1729 | CORRECT_DIR_SEPS (shortname); |
| 1730 | |
| 1731 | return build_string (shortname); |
| 1732 | } |
| 1733 | |
| 1734 | |
| 1735 | DEFUN ("w32-long-file-name", Fw32_long_file_name, Sw32_long_file_name, |
| 1736 | 1, 1, 0, |
| 1737 | doc: /* Return the long file name version of the full path of FILENAME. |
| 1738 | If FILENAME does not exist, return nil. |
| 1739 | All path elements in FILENAME are converted to their long names. */) |
| 1740 | (filename) |
| 1741 | Lisp_Object filename; |
| 1742 | { |
| 1743 | char longname[ MAX_PATH ]; |
| 1744 | |
| 1745 | CHECK_STRING (filename); |
| 1746 | |
| 1747 | /* first expand it. */ |
| 1748 | filename = Fexpand_file_name (filename, Qnil); |
| 1749 | |
| 1750 | if (!w32_get_long_filename (SDATA (filename), longname, MAX_PATH)) |
| 1751 | return Qnil; |
| 1752 | |
| 1753 | CORRECT_DIR_SEPS (longname); |
| 1754 | |
| 1755 | return build_string (longname); |
| 1756 | } |
| 1757 | |
| 1758 | DEFUN ("w32-set-process-priority", Fw32_set_process_priority, |
| 1759 | Sw32_set_process_priority, 2, 2, 0, |
| 1760 | doc: /* Set the priority of PROCESS to PRIORITY. |
| 1761 | If PROCESS is nil, the priority of Emacs is changed, otherwise the |
| 1762 | priority of the process whose pid is PROCESS is changed. |
| 1763 | PRIORITY should be one of the symbols high, normal, or low; |
| 1764 | any other symbol will be interpreted as normal. |
| 1765 | |
| 1766 | If successful, the return value is t, otherwise nil. */) |
| 1767 | (process, priority) |
| 1768 | Lisp_Object process, priority; |
| 1769 | { |
| 1770 | HANDLE proc_handle = GetCurrentProcess (); |
| 1771 | DWORD priority_class = NORMAL_PRIORITY_CLASS; |
| 1772 | Lisp_Object result = Qnil; |
| 1773 | |
| 1774 | CHECK_SYMBOL (priority); |
| 1775 | |
| 1776 | if (!NILP (process)) |
| 1777 | { |
| 1778 | DWORD pid; |
| 1779 | child_process *cp; |
| 1780 | |
| 1781 | CHECK_NUMBER (process); |
| 1782 | |
| 1783 | /* Allow pid to be an internally generated one, or one obtained |
| 1784 | externally. This is necessary because real pids on Win95 are |
| 1785 | negative. */ |
| 1786 | |
| 1787 | pid = XINT (process); |
| 1788 | cp = find_child_pid (pid); |
| 1789 | if (cp != NULL) |
| 1790 | pid = cp->procinfo.dwProcessId; |
| 1791 | |
| 1792 | proc_handle = OpenProcess (PROCESS_SET_INFORMATION, FALSE, pid); |
| 1793 | } |
| 1794 | |
| 1795 | if (EQ (priority, Qhigh)) |
| 1796 | priority_class = HIGH_PRIORITY_CLASS; |
| 1797 | else if (EQ (priority, Qlow)) |
| 1798 | priority_class = IDLE_PRIORITY_CLASS; |
| 1799 | |
| 1800 | if (proc_handle != NULL) |
| 1801 | { |
| 1802 | if (SetPriorityClass (proc_handle, priority_class)) |
| 1803 | result = Qt; |
| 1804 | if (!NILP (process)) |
| 1805 | CloseHandle (proc_handle); |
| 1806 | } |
| 1807 | |
| 1808 | return result; |
| 1809 | } |
| 1810 | |
| 1811 | |
| 1812 | DEFUN ("w32-get-locale-info", Fw32_get_locale_info, |
| 1813 | Sw32_get_locale_info, 1, 2, 0, |
| 1814 | doc: /* Return information about the Windows locale LCID. |
| 1815 | By default, return a three letter locale code which encodes the default |
| 1816 | language as the first two characters, and the country or regionial variant |
| 1817 | as the third letter. For example, ENU refers to `English (United States)', |
| 1818 | while ENC means `English (Canadian)'. |
| 1819 | |
| 1820 | If the optional argument LONGFORM is t, the long form of the locale |
| 1821 | name is returned, e.g. `English (United States)' instead; if LONGFORM |
| 1822 | is a number, it is interpreted as an LCTYPE constant and the corresponding |
| 1823 | locale information is returned. |
| 1824 | |
| 1825 | If LCID (a 16-bit number) is not a valid locale, the result is nil. */) |
| 1826 | (lcid, longform) |
| 1827 | Lisp_Object lcid, longform; |
| 1828 | { |
| 1829 | int got_abbrev; |
| 1830 | int got_full; |
| 1831 | char abbrev_name[32] = { 0 }; |
| 1832 | char full_name[256] = { 0 }; |
| 1833 | |
| 1834 | CHECK_NUMBER (lcid); |
| 1835 | |
| 1836 | if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED)) |
| 1837 | return Qnil; |
| 1838 | |
| 1839 | if (NILP (longform)) |
| 1840 | { |
| 1841 | got_abbrev = GetLocaleInfo (XINT (lcid), |
| 1842 | LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP, |
| 1843 | abbrev_name, sizeof (abbrev_name)); |
| 1844 | if (got_abbrev) |
| 1845 | return build_string (abbrev_name); |
| 1846 | } |
| 1847 | else if (EQ (longform, Qt)) |
| 1848 | { |
| 1849 | got_full = GetLocaleInfo (XINT (lcid), |
| 1850 | LOCALE_SLANGUAGE | LOCALE_USE_CP_ACP, |
| 1851 | full_name, sizeof (full_name)); |
| 1852 | if (got_full) |
| 1853 | return build_string (full_name); |
| 1854 | } |
| 1855 | else if (NUMBERP (longform)) |
| 1856 | { |
| 1857 | got_full = GetLocaleInfo (XINT (lcid), |
| 1858 | XINT (longform), |
| 1859 | full_name, sizeof (full_name)); |
| 1860 | if (got_full) |
| 1861 | return make_unibyte_string (full_name, got_full); |
| 1862 | } |
| 1863 | |
| 1864 | return Qnil; |
| 1865 | } |
| 1866 | |
| 1867 | |
| 1868 | DEFUN ("w32-get-current-locale-id", Fw32_get_current_locale_id, |
| 1869 | Sw32_get_current_locale_id, 0, 0, 0, |
| 1870 | doc: /* Return Windows locale id for current locale setting. |
| 1871 | This is a numerical value; use `w32-get-locale-info' to convert to a |
| 1872 | human-readable form. */) |
| 1873 | () |
| 1874 | { |
| 1875 | return make_number (GetThreadLocale ()); |
| 1876 | } |
| 1877 | |
| 1878 | DWORD int_from_hex (char * s) |
| 1879 | { |
| 1880 | DWORD val = 0; |
| 1881 | static char hex[] = "0123456789abcdefABCDEF"; |
| 1882 | char * p; |
| 1883 | |
| 1884 | while (*s && (p = strchr(hex, *s)) != NULL) |
| 1885 | { |
| 1886 | unsigned digit = p - hex; |
| 1887 | if (digit > 15) |
| 1888 | digit -= 6; |
| 1889 | val = val * 16 + digit; |
| 1890 | s++; |
| 1891 | } |
| 1892 | return val; |
| 1893 | } |
| 1894 | |
| 1895 | /* We need to build a global list, since the EnumSystemLocale callback |
| 1896 | function isn't given a context pointer. */ |
| 1897 | Lisp_Object Vw32_valid_locale_ids; |
| 1898 | |
| 1899 | BOOL CALLBACK enum_locale_fn (LPTSTR localeNum) |
| 1900 | { |
| 1901 | DWORD id = int_from_hex (localeNum); |
| 1902 | Vw32_valid_locale_ids = Fcons (make_number (id), Vw32_valid_locale_ids); |
| 1903 | return TRUE; |
| 1904 | } |
| 1905 | |
| 1906 | DEFUN ("w32-get-valid-locale-ids", Fw32_get_valid_locale_ids, |
| 1907 | Sw32_get_valid_locale_ids, 0, 0, 0, |
| 1908 | doc: /* Return list of all valid Windows locale ids. |
| 1909 | Each id is a numerical value; use `w32-get-locale-info' to convert to a |
| 1910 | human-readable form. */) |
| 1911 | () |
| 1912 | { |
| 1913 | Vw32_valid_locale_ids = Qnil; |
| 1914 | |
| 1915 | EnumSystemLocales (enum_locale_fn, LCID_SUPPORTED); |
| 1916 | |
| 1917 | Vw32_valid_locale_ids = Fnreverse (Vw32_valid_locale_ids); |
| 1918 | return Vw32_valid_locale_ids; |
| 1919 | } |
| 1920 | |
| 1921 | |
| 1922 | DEFUN ("w32-get-default-locale-id", Fw32_get_default_locale_id, Sw32_get_default_locale_id, 0, 1, 0, |
| 1923 | doc: /* Return Windows locale id for default locale setting. |
| 1924 | By default, the system default locale setting is returned; if the optional |
| 1925 | parameter USERP is non-nil, the user default locale setting is returned. |
| 1926 | This is a numerical value; use `w32-get-locale-info' to convert to a |
| 1927 | human-readable form. */) |
| 1928 | (userp) |
| 1929 | Lisp_Object userp; |
| 1930 | { |
| 1931 | if (NILP (userp)) |
| 1932 | return make_number (GetSystemDefaultLCID ()); |
| 1933 | return make_number (GetUserDefaultLCID ()); |
| 1934 | } |
| 1935 | |
| 1936 | |
| 1937 | DEFUN ("w32-set-current-locale", Fw32_set_current_locale, Sw32_set_current_locale, 1, 1, 0, |
| 1938 | doc: /* Make Windows locale LCID be the current locale setting for Emacs. |
| 1939 | If successful, the new locale id is returned, otherwise nil. */) |
| 1940 | (lcid) |
| 1941 | Lisp_Object lcid; |
| 1942 | { |
| 1943 | CHECK_NUMBER (lcid); |
| 1944 | |
| 1945 | if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED)) |
| 1946 | return Qnil; |
| 1947 | |
| 1948 | if (!SetThreadLocale (XINT (lcid))) |
| 1949 | return Qnil; |
| 1950 | |
| 1951 | /* Need to set input thread locale if present. */ |
| 1952 | if (dwWindowsThreadId) |
| 1953 | /* Reply is not needed. */ |
| 1954 | PostThreadMessage (dwWindowsThreadId, WM_EMACS_SETLOCALE, XINT (lcid), 0); |
| 1955 | |
| 1956 | return make_number (GetThreadLocale ()); |
| 1957 | } |
| 1958 | |
| 1959 | |
| 1960 | /* We need to build a global list, since the EnumCodePages callback |
| 1961 | function isn't given a context pointer. */ |
| 1962 | Lisp_Object Vw32_valid_codepages; |
| 1963 | |
| 1964 | BOOL CALLBACK enum_codepage_fn (LPTSTR codepageNum) |
| 1965 | { |
| 1966 | DWORD id = atoi (codepageNum); |
| 1967 | Vw32_valid_codepages = Fcons (make_number (id), Vw32_valid_codepages); |
| 1968 | return TRUE; |
| 1969 | } |
| 1970 | |
| 1971 | DEFUN ("w32-get-valid-codepages", Fw32_get_valid_codepages, |
| 1972 | Sw32_get_valid_codepages, 0, 0, 0, |
| 1973 | doc: /* Return list of all valid Windows codepages. */) |
| 1974 | () |
| 1975 | { |
| 1976 | Vw32_valid_codepages = Qnil; |
| 1977 | |
| 1978 | EnumSystemCodePages (enum_codepage_fn, CP_SUPPORTED); |
| 1979 | |
| 1980 | Vw32_valid_codepages = Fnreverse (Vw32_valid_codepages); |
| 1981 | return Vw32_valid_codepages; |
| 1982 | } |
| 1983 | |
| 1984 | |
| 1985 | DEFUN ("w32-get-console-codepage", Fw32_get_console_codepage, |
| 1986 | Sw32_get_console_codepage, 0, 0, 0, |
| 1987 | doc: /* Return current Windows codepage for console input. */) |
| 1988 | () |
| 1989 | { |
| 1990 | return make_number (GetConsoleCP ()); |
| 1991 | } |
| 1992 | |
| 1993 | |
| 1994 | DEFUN ("w32-set-console-codepage", Fw32_set_console_codepage, |
| 1995 | Sw32_set_console_codepage, 1, 1, 0, |
| 1996 | doc: /* Make Windows codepage CP be the current codepage setting for Emacs. |
| 1997 | The codepage setting affects keyboard input and display in tty mode. |
| 1998 | If successful, the new CP is returned, otherwise nil. */) |
| 1999 | (cp) |
| 2000 | Lisp_Object cp; |
| 2001 | { |
| 2002 | CHECK_NUMBER (cp); |
| 2003 | |
| 2004 | if (!IsValidCodePage (XINT (cp))) |
| 2005 | return Qnil; |
| 2006 | |
| 2007 | if (!SetConsoleCP (XINT (cp))) |
| 2008 | return Qnil; |
| 2009 | |
| 2010 | return make_number (GetConsoleCP ()); |
| 2011 | } |
| 2012 | |
| 2013 | |
| 2014 | DEFUN ("w32-get-console-output-codepage", Fw32_get_console_output_codepage, |
| 2015 | Sw32_get_console_output_codepage, 0, 0, 0, |
| 2016 | doc: /* Return current Windows codepage for console output. */) |
| 2017 | () |
| 2018 | { |
| 2019 | return make_number (GetConsoleOutputCP ()); |
| 2020 | } |
| 2021 | |
| 2022 | |
| 2023 | DEFUN ("w32-set-console-output-codepage", Fw32_set_console_output_codepage, |
| 2024 | Sw32_set_console_output_codepage, 1, 1, 0, |
| 2025 | doc: /* Make Windows codepage CP be the current codepage setting for Emacs. |
| 2026 | The codepage setting affects keyboard input and display in tty mode. |
| 2027 | If successful, the new CP is returned, otherwise nil. */) |
| 2028 | (cp) |
| 2029 | Lisp_Object cp; |
| 2030 | { |
| 2031 | CHECK_NUMBER (cp); |
| 2032 | |
| 2033 | if (!IsValidCodePage (XINT (cp))) |
| 2034 | return Qnil; |
| 2035 | |
| 2036 | if (!SetConsoleOutputCP (XINT (cp))) |
| 2037 | return Qnil; |
| 2038 | |
| 2039 | return make_number (GetConsoleOutputCP ()); |
| 2040 | } |
| 2041 | |
| 2042 | |
| 2043 | DEFUN ("w32-get-codepage-charset", Fw32_get_codepage_charset, |
| 2044 | Sw32_get_codepage_charset, 1, 1, 0, |
| 2045 | doc: /* Return charset of codepage CP. |
| 2046 | Returns nil if the codepage is not valid. */) |
| 2047 | (cp) |
| 2048 | Lisp_Object cp; |
| 2049 | { |
| 2050 | CHARSETINFO info; |
| 2051 | |
| 2052 | CHECK_NUMBER (cp); |
| 2053 | |
| 2054 | if (!IsValidCodePage (XINT (cp))) |
| 2055 | return Qnil; |
| 2056 | |
| 2057 | if (TranslateCharsetInfo ((DWORD *) XINT (cp), &info, TCI_SRCCODEPAGE)) |
| 2058 | return make_number (info.ciCharset); |
| 2059 | |
| 2060 | return Qnil; |
| 2061 | } |
| 2062 | |
| 2063 | |
| 2064 | DEFUN ("w32-get-valid-keyboard-layouts", Fw32_get_valid_keyboard_layouts, |
| 2065 | Sw32_get_valid_keyboard_layouts, 0, 0, 0, |
| 2066 | doc: /* Return list of Windows keyboard languages and layouts. |
| 2067 | The return value is a list of pairs of language id and layout id. */) |
| 2068 | () |
| 2069 | { |
| 2070 | int num_layouts = GetKeyboardLayoutList (0, NULL); |
| 2071 | HKL * layouts = (HKL *) alloca (num_layouts * sizeof (HKL)); |
| 2072 | Lisp_Object obj = Qnil; |
| 2073 | |
| 2074 | if (GetKeyboardLayoutList (num_layouts, layouts) == num_layouts) |
| 2075 | { |
| 2076 | while (--num_layouts >= 0) |
| 2077 | { |
| 2078 | DWORD kl = (DWORD) layouts[num_layouts]; |
| 2079 | |
| 2080 | obj = Fcons (Fcons (make_number (kl & 0xffff), |
| 2081 | make_number ((kl >> 16) & 0xffff)), |
| 2082 | obj); |
| 2083 | } |
| 2084 | } |
| 2085 | |
| 2086 | return obj; |
| 2087 | } |
| 2088 | |
| 2089 | |
| 2090 | DEFUN ("w32-get-keyboard-layout", Fw32_get_keyboard_layout, |
| 2091 | Sw32_get_keyboard_layout, 0, 0, 0, |
| 2092 | doc: /* Return current Windows keyboard language and layout. |
| 2093 | The return value is the cons of the language id and the layout id. */) |
| 2094 | () |
| 2095 | { |
| 2096 | DWORD kl = (DWORD) GetKeyboardLayout (dwWindowsThreadId); |
| 2097 | |
| 2098 | return Fcons (make_number (kl & 0xffff), |
| 2099 | make_number ((kl >> 16) & 0xffff)); |
| 2100 | } |
| 2101 | |
| 2102 | |
| 2103 | DEFUN ("w32-set-keyboard-layout", Fw32_set_keyboard_layout, |
| 2104 | Sw32_set_keyboard_layout, 1, 1, 0, |
| 2105 | doc: /* Make LAYOUT be the current keyboard layout for Emacs. |
| 2106 | The keyboard layout setting affects interpretation of keyboard input. |
| 2107 | If successful, the new layout id is returned, otherwise nil. */) |
| 2108 | (layout) |
| 2109 | Lisp_Object layout; |
| 2110 | { |
| 2111 | DWORD kl; |
| 2112 | |
| 2113 | CHECK_CONS (layout); |
| 2114 | CHECK_NUMBER_CAR (layout); |
| 2115 | CHECK_NUMBER_CDR (layout); |
| 2116 | |
| 2117 | kl = (XINT (XCAR (layout)) & 0xffff) |
| 2118 | | (XINT (XCDR (layout)) << 16); |
| 2119 | |
| 2120 | /* Synchronize layout with input thread. */ |
| 2121 | if (dwWindowsThreadId) |
| 2122 | { |
| 2123 | if (PostThreadMessage (dwWindowsThreadId, WM_EMACS_SETKEYBOARDLAYOUT, |
| 2124 | (WPARAM) kl, 0)) |
| 2125 | { |
| 2126 | MSG msg; |
| 2127 | GetMessage (&msg, NULL, WM_EMACS_DONE, WM_EMACS_DONE); |
| 2128 | |
| 2129 | if (msg.wParam == 0) |
| 2130 | return Qnil; |
| 2131 | } |
| 2132 | } |
| 2133 | else if (!ActivateKeyboardLayout ((HKL) kl, 0)) |
| 2134 | return Qnil; |
| 2135 | |
| 2136 | return Fw32_get_keyboard_layout (); |
| 2137 | } |
| 2138 | |
| 2139 | \f |
| 2140 | syms_of_ntproc () |
| 2141 | { |
| 2142 | Qhigh = intern ("high"); |
| 2143 | Qlow = intern ("low"); |
| 2144 | |
| 2145 | #ifdef HAVE_SOCKETS |
| 2146 | defsubr (&Sw32_has_winsock); |
| 2147 | defsubr (&Sw32_unload_winsock); |
| 2148 | #endif |
| 2149 | defsubr (&Sw32_short_file_name); |
| 2150 | defsubr (&Sw32_long_file_name); |
| 2151 | defsubr (&Sw32_set_process_priority); |
| 2152 | defsubr (&Sw32_get_locale_info); |
| 2153 | defsubr (&Sw32_get_current_locale_id); |
| 2154 | defsubr (&Sw32_get_default_locale_id); |
| 2155 | defsubr (&Sw32_get_valid_locale_ids); |
| 2156 | defsubr (&Sw32_set_current_locale); |
| 2157 | |
| 2158 | defsubr (&Sw32_get_console_codepage); |
| 2159 | defsubr (&Sw32_set_console_codepage); |
| 2160 | defsubr (&Sw32_get_console_output_codepage); |
| 2161 | defsubr (&Sw32_set_console_output_codepage); |
| 2162 | defsubr (&Sw32_get_valid_codepages); |
| 2163 | defsubr (&Sw32_get_codepage_charset); |
| 2164 | |
| 2165 | defsubr (&Sw32_get_valid_keyboard_layouts); |
| 2166 | defsubr (&Sw32_get_keyboard_layout); |
| 2167 | defsubr (&Sw32_set_keyboard_layout); |
| 2168 | |
| 2169 | DEFVAR_LISP ("w32-quote-process-args", &Vw32_quote_process_args, |
| 2170 | doc: /* Non-nil enables quoting of process arguments to ensure correct parsing. |
| 2171 | Because Windows does not directly pass argv arrays to child processes, |
| 2172 | programs have to reconstruct the argv array by parsing the command |
| 2173 | line string. For an argument to contain a space, it must be enclosed |
| 2174 | in double quotes or it will be parsed as multiple arguments. |
| 2175 | |
| 2176 | If the value is a character, that character will be used to escape any |
| 2177 | quote characters that appear, otherwise a suitable escape character |
| 2178 | will be chosen based on the type of the program. */); |
| 2179 | Vw32_quote_process_args = Qt; |
| 2180 | |
| 2181 | DEFVAR_LISP ("w32-start-process-show-window", |
| 2182 | &Vw32_start_process_show_window, |
| 2183 | doc: /* When nil, new child processes hide their windows. |
| 2184 | When non-nil, they show their window in the method of their choice. |
| 2185 | This variable doesn't affect GUI applications, which will never be hidden. */); |
| 2186 | Vw32_start_process_show_window = Qnil; |
| 2187 | |
| 2188 | DEFVAR_LISP ("w32-start-process-share-console", |
| 2189 | &Vw32_start_process_share_console, |
| 2190 | doc: /* When nil, new child processes are given a new console. |
| 2191 | When non-nil, they share the Emacs console; this has the limitation of |
| 2192 | allowing only one DOS subprocess to run at a time (whether started directly |
| 2193 | or indirectly by Emacs), and preventing Emacs from cleanly terminating the |
| 2194 | subprocess group, but may allow Emacs to interrupt a subprocess that doesn't |
| 2195 | otherwise respond to interrupts from Emacs. */); |
| 2196 | Vw32_start_process_share_console = Qnil; |
| 2197 | |
| 2198 | DEFVAR_LISP ("w32-start-process-inherit-error-mode", |
| 2199 | &Vw32_start_process_inherit_error_mode, |
| 2200 | doc: /* When nil, new child processes revert to the default error mode. |
| 2201 | When non-nil, they inherit their error mode setting from Emacs, which stops |
| 2202 | them blocking when trying to access unmounted drives etc. */); |
| 2203 | Vw32_start_process_inherit_error_mode = Qt; |
| 2204 | |
| 2205 | DEFVAR_INT ("w32-pipe-read-delay", &Vw32_pipe_read_delay, |
| 2206 | doc: /* Forced delay before reading subprocess output. |
| 2207 | This is done to improve the buffering of subprocess output, by |
| 2208 | avoiding the inefficiency of frequently reading small amounts of data. |
| 2209 | |
| 2210 | If positive, the value is the number of milliseconds to sleep before |
| 2211 | reading the subprocess output. If negative, the magnitude is the number |
| 2212 | of time slices to wait (effectively boosting the priority of the child |
| 2213 | process temporarily). A value of zero disables waiting entirely. */); |
| 2214 | Vw32_pipe_read_delay = 50; |
| 2215 | |
| 2216 | DEFVAR_LISP ("w32-downcase-file-names", &Vw32_downcase_file_names, |
| 2217 | doc: /* Non-nil means convert all-upper case file names to lower case. |
| 2218 | This applies when performing completions and file name expansion. |
| 2219 | Note that the value of this setting also affects remote file names, |
| 2220 | so you probably don't want to set to non-nil if you use case-sensitive |
| 2221 | filesystems via ange-ftp. */); |
| 2222 | Vw32_downcase_file_names = Qnil; |
| 2223 | |
| 2224 | #if 0 |
| 2225 | DEFVAR_LISP ("w32-generate-fake-inodes", &Vw32_generate_fake_inodes, |
| 2226 | doc: /* Non-nil means attempt to fake realistic inode values. |
| 2227 | This works by hashing the truename of files, and should detect |
| 2228 | aliasing between long and short (8.3 DOS) names, but can have |
| 2229 | false positives because of hash collisions. Note that determing |
| 2230 | the truename of a file can be slow. */); |
| 2231 | Vw32_generate_fake_inodes = Qnil; |
| 2232 | #endif |
| 2233 | |
| 2234 | DEFVAR_LISP ("w32-get-true-file-attributes", &Vw32_get_true_file_attributes, |
| 2235 | doc: /* Non-nil means determine accurate link count in `file-attributes'. |
| 2236 | Note that this option is only useful for files on NTFS volumes, where hard links |
| 2237 | are supported. Moreover, it slows down `file-attributes' noticeably. */); |
| 2238 | Vw32_get_true_file_attributes = Qt; |
| 2239 | } |
| 2240 | /* end of ntproc.c */ |
| 2241 | |
| 2242 | /* arch-tag: 23d3a34c-06d2-48a1-833b-ac7609aa5250 |
| 2243 | (do not change this comment) */ |