| 1 | /* Process support for GNU Emacs on the Microsoft Windows API. |
| 2 | |
| 3 | Copyright (C) 1992, 1995, 1999-2013 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GNU Emacs. |
| 6 | |
| 7 | GNU Emacs is free software: you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation, either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | GNU Emacs is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | /* |
| 21 | Drew Bliss Oct 14, 1993 |
| 22 | Adapted from alarm.c by Tim Fleehart |
| 23 | */ |
| 24 | |
| 25 | #include <mingw_time.h> |
| 26 | #include <stdio.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <errno.h> |
| 29 | #include <ctype.h> |
| 30 | #include <io.h> |
| 31 | #include <fcntl.h> |
| 32 | #include <signal.h> |
| 33 | #include <sys/file.h> |
| 34 | #include <mbstring.h> |
| 35 | |
| 36 | /* must include CRT headers *before* config.h */ |
| 37 | #include <config.h> |
| 38 | |
| 39 | #undef signal |
| 40 | #undef wait |
| 41 | #undef spawnve |
| 42 | #undef select |
| 43 | #undef kill |
| 44 | |
| 45 | #include <windows.h> |
| 46 | #if defined(__GNUC__) && !defined(__MINGW64__) |
| 47 | /* This definition is missing from mingw.org headers, but not MinGW64 |
| 48 | headers. */ |
| 49 | extern BOOL WINAPI IsValidLocale (LCID, DWORD); |
| 50 | #endif |
| 51 | |
| 52 | #ifdef HAVE_LANGINFO_CODESET |
| 53 | #include <nl_types.h> |
| 54 | #include <langinfo.h> |
| 55 | #endif |
| 56 | |
| 57 | #include "lisp.h" |
| 58 | #include "w32.h" |
| 59 | #include "w32common.h" |
| 60 | #include "w32heap.h" |
| 61 | #include "systime.h" |
| 62 | #include "syswait.h" |
| 63 | #include "process.h" |
| 64 | #include "syssignal.h" |
| 65 | #include "w32term.h" |
| 66 | #include "dispextern.h" /* for xstrcasecmp */ |
| 67 | #include "coding.h" |
| 68 | |
| 69 | #define RVA_TO_PTR(var,section,filedata) \ |
| 70 | ((void *)((section)->PointerToRawData \ |
| 71 | + ((DWORD_PTR)(var) - (section)->VirtualAddress) \ |
| 72 | + (filedata).file_base)) |
| 73 | |
| 74 | Lisp_Object Qhigh, Qlow; |
| 75 | |
| 76 | /* Signal handlers...SIG_DFL == 0 so this is initialized correctly. */ |
| 77 | static signal_handler sig_handlers[NSIG]; |
| 78 | |
| 79 | static sigset_t sig_mask; |
| 80 | |
| 81 | static CRITICAL_SECTION crit_sig; |
| 82 | |
| 83 | /* Improve on the CRT 'signal' implementation so that we could record |
| 84 | the SIGCHLD handler and fake interval timers. */ |
| 85 | signal_handler |
| 86 | sys_signal (int sig, signal_handler handler) |
| 87 | { |
| 88 | signal_handler old; |
| 89 | |
| 90 | /* SIGCHLD is needed for supporting subprocesses, see sys_kill |
| 91 | below. SIGALRM and SIGPROF are used by setitimer. All the |
| 92 | others are the only ones supported by the MS runtime. */ |
| 93 | if (!(sig == SIGCHLD || sig == SIGSEGV || sig == SIGILL |
| 94 | || sig == SIGFPE || sig == SIGABRT || sig == SIGTERM |
| 95 | || sig == SIGALRM || sig == SIGPROF)) |
| 96 | { |
| 97 | errno = EINVAL; |
| 98 | return SIG_ERR; |
| 99 | } |
| 100 | old = sig_handlers[sig]; |
| 101 | /* SIGABRT is treated specially because w32.c installs term_ntproc |
| 102 | as its handler, so we don't want to override that afterwards. |
| 103 | Aborting Emacs works specially anyway: either by calling |
| 104 | emacs_abort directly or through terminate_due_to_signal, which |
| 105 | calls emacs_abort through emacs_raise. */ |
| 106 | if (!(sig == SIGABRT && old == term_ntproc)) |
| 107 | { |
| 108 | sig_handlers[sig] = handler; |
| 109 | if (!(sig == SIGCHLD || sig == SIGALRM || sig == SIGPROF)) |
| 110 | signal (sig, handler); |
| 111 | } |
| 112 | return old; |
| 113 | } |
| 114 | |
| 115 | /* Emulate sigaction. */ |
| 116 | int |
| 117 | sigaction (int sig, const struct sigaction *act, struct sigaction *oact) |
| 118 | { |
| 119 | signal_handler old = SIG_DFL; |
| 120 | int retval = 0; |
| 121 | |
| 122 | if (act) |
| 123 | old = sys_signal (sig, act->sa_handler); |
| 124 | else if (oact) |
| 125 | old = sig_handlers[sig]; |
| 126 | |
| 127 | if (old == SIG_ERR) |
| 128 | { |
| 129 | errno = EINVAL; |
| 130 | retval = -1; |
| 131 | } |
| 132 | if (oact) |
| 133 | { |
| 134 | oact->sa_handler = old; |
| 135 | oact->sa_flags = 0; |
| 136 | oact->sa_mask = empty_mask; |
| 137 | } |
| 138 | return retval; |
| 139 | } |
| 140 | |
| 141 | /* Emulate signal sets and blocking of signals used by timers. */ |
| 142 | |
| 143 | int |
| 144 | sigemptyset (sigset_t *set) |
| 145 | { |
| 146 | *set = 0; |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | int |
| 151 | sigaddset (sigset_t *set, int signo) |
| 152 | { |
| 153 | if (!set) |
| 154 | { |
| 155 | errno = EINVAL; |
| 156 | return -1; |
| 157 | } |
| 158 | if (signo < 0 || signo >= NSIG) |
| 159 | { |
| 160 | errno = EINVAL; |
| 161 | return -1; |
| 162 | } |
| 163 | |
| 164 | *set |= (1U << signo); |
| 165 | |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | int |
| 170 | sigfillset (sigset_t *set) |
| 171 | { |
| 172 | if (!set) |
| 173 | { |
| 174 | errno = EINVAL; |
| 175 | return -1; |
| 176 | } |
| 177 | |
| 178 | *set = 0xFFFFFFFF; |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | int |
| 183 | sigprocmask (int how, const sigset_t *set, sigset_t *oset) |
| 184 | { |
| 185 | if (!(how == SIG_BLOCK || how == SIG_UNBLOCK || how == SIG_SETMASK)) |
| 186 | { |
| 187 | errno = EINVAL; |
| 188 | return -1; |
| 189 | } |
| 190 | |
| 191 | if (oset) |
| 192 | *oset = sig_mask; |
| 193 | |
| 194 | if (!set) |
| 195 | return 0; |
| 196 | |
| 197 | switch (how) |
| 198 | { |
| 199 | case SIG_BLOCK: |
| 200 | sig_mask |= *set; |
| 201 | break; |
| 202 | case SIG_SETMASK: |
| 203 | sig_mask = *set; |
| 204 | break; |
| 205 | case SIG_UNBLOCK: |
| 206 | /* FIXME: Catch signals that are blocked and reissue them when |
| 207 | they are unblocked. Important for SIGALRM and SIGPROF only. */ |
| 208 | sig_mask &= ~(*set); |
| 209 | break; |
| 210 | } |
| 211 | |
| 212 | return 0; |
| 213 | } |
| 214 | |
| 215 | int |
| 216 | pthread_sigmask (int how, const sigset_t *set, sigset_t *oset) |
| 217 | { |
| 218 | if (sigprocmask (how, set, oset) == -1) |
| 219 | return EINVAL; |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | int |
| 224 | sigismember (const sigset_t *set, int signo) |
| 225 | { |
| 226 | if (signo < 0 || signo >= NSIG) |
| 227 | { |
| 228 | errno = EINVAL; |
| 229 | return -1; |
| 230 | } |
| 231 | if (signo > sizeof (*set) * BITS_PER_CHAR) |
| 232 | emacs_abort (); |
| 233 | |
| 234 | return (*set & (1U << signo)) != 0; |
| 235 | } |
| 236 | |
| 237 | pid_t |
| 238 | getpgrp (void) |
| 239 | { |
| 240 | return getpid (); |
| 241 | } |
| 242 | |
| 243 | pid_t |
| 244 | tcgetpgrp (int fd) |
| 245 | { |
| 246 | return getpid (); |
| 247 | } |
| 248 | |
| 249 | int |
| 250 | setpgid (pid_t pid, pid_t pgid) |
| 251 | { |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | pid_t |
| 256 | setsid (void) |
| 257 | { |
| 258 | return getpid (); |
| 259 | } |
| 260 | |
| 261 | /* Emulations of interval timers. |
| 262 | |
| 263 | Limitations: only ITIMER_REAL and ITIMER_PROF are supported. |
| 264 | |
| 265 | Implementation: a separate thread is started for each timer type, |
| 266 | the thread calls the appropriate signal handler when the timer |
| 267 | expires, after stopping the thread which installed the timer. */ |
| 268 | |
| 269 | struct itimer_data { |
| 270 | volatile ULONGLONG expire; |
| 271 | volatile ULONGLONG reload; |
| 272 | volatile int terminate; |
| 273 | int type; |
| 274 | HANDLE caller_thread; |
| 275 | HANDLE timer_thread; |
| 276 | }; |
| 277 | |
| 278 | static ULONGLONG ticks_now; |
| 279 | static struct itimer_data real_itimer, prof_itimer; |
| 280 | static ULONGLONG clocks_min; |
| 281 | /* If non-zero, itimers are disabled. Used during shutdown, when we |
| 282 | delete the critical sections used by the timer threads. */ |
| 283 | static int disable_itimers; |
| 284 | |
| 285 | static CRITICAL_SECTION crit_real, crit_prof; |
| 286 | |
| 287 | /* GetThreadTimes is not available on Windows 9X and possibly also on 2K. */ |
| 288 | typedef BOOL (WINAPI *GetThreadTimes_Proc) ( |
| 289 | HANDLE hThread, |
| 290 | LPFILETIME lpCreationTime, |
| 291 | LPFILETIME lpExitTime, |
| 292 | LPFILETIME lpKernelTime, |
| 293 | LPFILETIME lpUserTime); |
| 294 | |
| 295 | static GetThreadTimes_Proc s_pfn_Get_Thread_Times; |
| 296 | |
| 297 | #define MAX_SINGLE_SLEEP 30 |
| 298 | #define TIMER_TICKS_PER_SEC 1000 |
| 299 | |
| 300 | /* Return a suitable time value, in 1-ms units, for THREAD, a handle |
| 301 | to a thread. If THREAD is NULL or an invalid handle, return the |
| 302 | current wall-clock time since January 1, 1601 (UTC). Otherwise, |
| 303 | return the sum of kernel and user times used by THREAD since it was |
| 304 | created, plus its creation time. */ |
| 305 | static ULONGLONG |
| 306 | w32_get_timer_time (HANDLE thread) |
| 307 | { |
| 308 | ULONGLONG retval; |
| 309 | int use_system_time = 1; |
| 310 | /* The functions below return times in 100-ns units. */ |
| 311 | const int tscale = 10 * TIMER_TICKS_PER_SEC; |
| 312 | |
| 313 | if (thread && thread != INVALID_HANDLE_VALUE |
| 314 | && s_pfn_Get_Thread_Times != NULL) |
| 315 | { |
| 316 | FILETIME creation_ftime, exit_ftime, kernel_ftime, user_ftime; |
| 317 | ULARGE_INTEGER temp_creation, temp_kernel, temp_user; |
| 318 | |
| 319 | if (s_pfn_Get_Thread_Times (thread, &creation_ftime, &exit_ftime, |
| 320 | &kernel_ftime, &user_ftime)) |
| 321 | { |
| 322 | use_system_time = 0; |
| 323 | temp_creation.LowPart = creation_ftime.dwLowDateTime; |
| 324 | temp_creation.HighPart = creation_ftime.dwHighDateTime; |
| 325 | temp_kernel.LowPart = kernel_ftime.dwLowDateTime; |
| 326 | temp_kernel.HighPart = kernel_ftime.dwHighDateTime; |
| 327 | temp_user.LowPart = user_ftime.dwLowDateTime; |
| 328 | temp_user.HighPart = user_ftime.dwHighDateTime; |
| 329 | retval = |
| 330 | temp_creation.QuadPart / tscale + temp_kernel.QuadPart / tscale |
| 331 | + temp_user.QuadPart / tscale; |
| 332 | } |
| 333 | else |
| 334 | DebPrint (("GetThreadTimes failed with error code %lu\n", |
| 335 | GetLastError ())); |
| 336 | } |
| 337 | |
| 338 | if (use_system_time) |
| 339 | { |
| 340 | FILETIME current_ftime; |
| 341 | ULARGE_INTEGER temp; |
| 342 | |
| 343 | GetSystemTimeAsFileTime (¤t_ftime); |
| 344 | |
| 345 | temp.LowPart = current_ftime.dwLowDateTime; |
| 346 | temp.HighPart = current_ftime.dwHighDateTime; |
| 347 | |
| 348 | retval = temp.QuadPart / tscale; |
| 349 | } |
| 350 | |
| 351 | return retval; |
| 352 | } |
| 353 | |
| 354 | /* Thread function for a timer thread. */ |
| 355 | static DWORD WINAPI |
| 356 | timer_loop (LPVOID arg) |
| 357 | { |
| 358 | struct itimer_data *itimer = (struct itimer_data *)arg; |
| 359 | int which = itimer->type; |
| 360 | int sig = (which == ITIMER_REAL) ? SIGALRM : SIGPROF; |
| 361 | CRITICAL_SECTION *crit = (which == ITIMER_REAL) ? &crit_real : &crit_prof; |
| 362 | const DWORD max_sleep = MAX_SINGLE_SLEEP * 1000 / TIMER_TICKS_PER_SEC; |
| 363 | HANDLE hth = (which == ITIMER_REAL) ? NULL : itimer->caller_thread; |
| 364 | |
| 365 | while (1) |
| 366 | { |
| 367 | DWORD sleep_time; |
| 368 | signal_handler handler; |
| 369 | ULONGLONG now, expire, reload; |
| 370 | |
| 371 | /* Load new values if requested by setitimer. */ |
| 372 | EnterCriticalSection (crit); |
| 373 | expire = itimer->expire; |
| 374 | reload = itimer->reload; |
| 375 | LeaveCriticalSection (crit); |
| 376 | if (itimer->terminate) |
| 377 | return 0; |
| 378 | |
| 379 | if (expire == 0) |
| 380 | { |
| 381 | /* We are idle. */ |
| 382 | Sleep (max_sleep); |
| 383 | continue; |
| 384 | } |
| 385 | |
| 386 | if (expire > (now = w32_get_timer_time (hth))) |
| 387 | sleep_time = expire - now; |
| 388 | else |
| 389 | sleep_time = 0; |
| 390 | /* Don't sleep too long at a time, to be able to see the |
| 391 | termination flag without too long a delay. */ |
| 392 | while (sleep_time > max_sleep) |
| 393 | { |
| 394 | if (itimer->terminate) |
| 395 | return 0; |
| 396 | Sleep (max_sleep); |
| 397 | EnterCriticalSection (crit); |
| 398 | expire = itimer->expire; |
| 399 | LeaveCriticalSection (crit); |
| 400 | sleep_time = |
| 401 | (expire > (now = w32_get_timer_time (hth))) ? expire - now : 0; |
| 402 | } |
| 403 | if (itimer->terminate) |
| 404 | return 0; |
| 405 | if (sleep_time > 0) |
| 406 | { |
| 407 | Sleep (sleep_time * 1000 / TIMER_TICKS_PER_SEC); |
| 408 | /* Always sleep past the expiration time, to make sure we |
| 409 | never call the handler _before_ the expiration time, |
| 410 | always slightly after it. Sleep(5) makes sure we don't |
| 411 | hog the CPU by calling 'w32_get_timer_time' with high |
| 412 | frequency, and also let other threads work. */ |
| 413 | while (w32_get_timer_time (hth) < expire) |
| 414 | Sleep (5); |
| 415 | } |
| 416 | |
| 417 | EnterCriticalSection (crit); |
| 418 | expire = itimer->expire; |
| 419 | LeaveCriticalSection (crit); |
| 420 | if (expire == 0) |
| 421 | continue; |
| 422 | |
| 423 | /* Time's up. */ |
| 424 | handler = sig_handlers[sig]; |
| 425 | if (!(handler == SIG_DFL || handler == SIG_IGN || handler == SIG_ERR) |
| 426 | /* FIXME: Don't ignore masked signals. Instead, record that |
| 427 | they happened and reissue them when the signal is |
| 428 | unblocked. */ |
| 429 | && !sigismember (&sig_mask, sig) |
| 430 | /* Simulate masking of SIGALRM and SIGPROF when processing |
| 431 | fatal signals. */ |
| 432 | && !fatal_error_in_progress |
| 433 | && itimer->caller_thread) |
| 434 | { |
| 435 | /* Simulate a signal delivered to the thread which installed |
| 436 | the timer, by suspending that thread while the handler |
| 437 | runs. */ |
| 438 | HANDLE th = itimer->caller_thread; |
| 439 | DWORD result = SuspendThread (th); |
| 440 | |
| 441 | if (result == (DWORD)-1) |
| 442 | return 2; |
| 443 | |
| 444 | handler (sig); |
| 445 | ResumeThread (th); |
| 446 | } |
| 447 | |
| 448 | /* Update expiration time and loop. */ |
| 449 | EnterCriticalSection (crit); |
| 450 | expire = itimer->expire; |
| 451 | if (expire == 0) |
| 452 | { |
| 453 | LeaveCriticalSection (crit); |
| 454 | continue; |
| 455 | } |
| 456 | reload = itimer->reload; |
| 457 | if (reload > 0) |
| 458 | { |
| 459 | now = w32_get_timer_time (hth); |
| 460 | if (expire <= now) |
| 461 | { |
| 462 | ULONGLONG lag = now - expire; |
| 463 | |
| 464 | /* If we missed some opportunities (presumably while |
| 465 | sleeping or while the signal handler ran), skip |
| 466 | them. */ |
| 467 | if (lag > reload) |
| 468 | expire = now - (lag % reload); |
| 469 | |
| 470 | expire += reload; |
| 471 | } |
| 472 | } |
| 473 | else |
| 474 | expire = 0; /* become idle */ |
| 475 | itimer->expire = expire; |
| 476 | LeaveCriticalSection (crit); |
| 477 | } |
| 478 | return 0; |
| 479 | } |
| 480 | |
| 481 | static void |
| 482 | stop_timer_thread (int which) |
| 483 | { |
| 484 | struct itimer_data *itimer = |
| 485 | (which == ITIMER_REAL) ? &real_itimer : &prof_itimer; |
| 486 | int i; |
| 487 | DWORD err, exit_code = 255; |
| 488 | BOOL status; |
| 489 | |
| 490 | /* Signal the thread that it should terminate. */ |
| 491 | itimer->terminate = 1; |
| 492 | |
| 493 | if (itimer->timer_thread == NULL) |
| 494 | return; |
| 495 | |
| 496 | /* Wait for the timer thread to terminate voluntarily, then kill it |
| 497 | if it doesn't. This loop waits twice more than the maximum |
| 498 | amount of time a timer thread sleeps, see above. */ |
| 499 | for (i = 0; i < MAX_SINGLE_SLEEP / 5; i++) |
| 500 | { |
| 501 | if (!((status = GetExitCodeThread (itimer->timer_thread, &exit_code)) |
| 502 | && exit_code == STILL_ACTIVE)) |
| 503 | break; |
| 504 | Sleep (10); |
| 505 | } |
| 506 | if ((status == FALSE && (err = GetLastError ()) == ERROR_INVALID_HANDLE) |
| 507 | || exit_code == STILL_ACTIVE) |
| 508 | { |
| 509 | if (!(status == FALSE && err == ERROR_INVALID_HANDLE)) |
| 510 | TerminateThread (itimer->timer_thread, 0); |
| 511 | } |
| 512 | |
| 513 | /* Clean up. */ |
| 514 | CloseHandle (itimer->timer_thread); |
| 515 | itimer->timer_thread = NULL; |
| 516 | if (itimer->caller_thread) |
| 517 | { |
| 518 | CloseHandle (itimer->caller_thread); |
| 519 | itimer->caller_thread = NULL; |
| 520 | } |
| 521 | } |
| 522 | |
| 523 | /* This is called at shutdown time from term_ntproc. */ |
| 524 | void |
| 525 | term_timers (void) |
| 526 | { |
| 527 | if (real_itimer.timer_thread) |
| 528 | stop_timer_thread (ITIMER_REAL); |
| 529 | if (prof_itimer.timer_thread) |
| 530 | stop_timer_thread (ITIMER_PROF); |
| 531 | |
| 532 | /* We are going to delete the critical sections, so timers cannot |
| 533 | work after this. */ |
| 534 | disable_itimers = 1; |
| 535 | |
| 536 | DeleteCriticalSection (&crit_real); |
| 537 | DeleteCriticalSection (&crit_prof); |
| 538 | DeleteCriticalSection (&crit_sig); |
| 539 | } |
| 540 | |
| 541 | /* This is called at initialization time from init_ntproc. */ |
| 542 | void |
| 543 | init_timers (void) |
| 544 | { |
| 545 | /* GetThreadTimes is not available on all versions of Windows, so |
| 546 | need to probe for its availability dynamically, and call it |
| 547 | through a pointer. */ |
| 548 | s_pfn_Get_Thread_Times = NULL; /* in case dumped Emacs comes with a value */ |
| 549 | if (os_subtype != OS_9X) |
| 550 | s_pfn_Get_Thread_Times = |
| 551 | (GetThreadTimes_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 552 | "GetThreadTimes"); |
| 553 | |
| 554 | /* Make sure we start with zeroed out itimer structures, since |
| 555 | dumping may have left there traces of threads long dead. */ |
| 556 | memset (&real_itimer, 0, sizeof real_itimer); |
| 557 | memset (&prof_itimer, 0, sizeof prof_itimer); |
| 558 | |
| 559 | InitializeCriticalSection (&crit_real); |
| 560 | InitializeCriticalSection (&crit_prof); |
| 561 | InitializeCriticalSection (&crit_sig); |
| 562 | |
| 563 | disable_itimers = 0; |
| 564 | } |
| 565 | |
| 566 | static int |
| 567 | start_timer_thread (int which) |
| 568 | { |
| 569 | DWORD exit_code; |
| 570 | HANDLE th; |
| 571 | struct itimer_data *itimer = |
| 572 | (which == ITIMER_REAL) ? &real_itimer : &prof_itimer; |
| 573 | |
| 574 | if (itimer->timer_thread |
| 575 | && GetExitCodeThread (itimer->timer_thread, &exit_code) |
| 576 | && exit_code == STILL_ACTIVE) |
| 577 | return 0; |
| 578 | |
| 579 | /* Clean up after possibly exited thread. */ |
| 580 | if (itimer->timer_thread) |
| 581 | { |
| 582 | CloseHandle (itimer->timer_thread); |
| 583 | itimer->timer_thread = NULL; |
| 584 | } |
| 585 | if (itimer->caller_thread) |
| 586 | { |
| 587 | CloseHandle (itimer->caller_thread); |
| 588 | itimer->caller_thread = NULL; |
| 589 | } |
| 590 | |
| 591 | /* Start a new thread. */ |
| 592 | if (!DuplicateHandle (GetCurrentProcess (), GetCurrentThread (), |
| 593 | GetCurrentProcess (), &th, 0, FALSE, |
| 594 | DUPLICATE_SAME_ACCESS)) |
| 595 | { |
| 596 | errno = ESRCH; |
| 597 | return -1; |
| 598 | } |
| 599 | itimer->terminate = 0; |
| 600 | itimer->type = which; |
| 601 | itimer->caller_thread = th; |
| 602 | /* Request that no more than 64KB of stack be reserved for this |
| 603 | thread, to avoid reserving too much memory, which would get in |
| 604 | the way of threads we start to wait for subprocesses. See also |
| 605 | new_child below. */ |
| 606 | itimer->timer_thread = CreateThread (NULL, 64 * 1024, timer_loop, |
| 607 | (void *)itimer, 0x00010000, NULL); |
| 608 | |
| 609 | if (!itimer->timer_thread) |
| 610 | { |
| 611 | CloseHandle (itimer->caller_thread); |
| 612 | itimer->caller_thread = NULL; |
| 613 | errno = EAGAIN; |
| 614 | return -1; |
| 615 | } |
| 616 | |
| 617 | /* This is needed to make sure that the timer thread running for |
| 618 | profiling gets CPU as soon as the Sleep call terminates. */ |
| 619 | if (which == ITIMER_PROF) |
| 620 | SetThreadPriority (itimer->timer_thread, THREAD_PRIORITY_TIME_CRITICAL); |
| 621 | |
| 622 | return 0; |
| 623 | } |
| 624 | |
| 625 | /* Most of the code of getitimer and setitimer (but not of their |
| 626 | subroutines) was shamelessly stolen from itimer.c in the DJGPP |
| 627 | library, see www.delorie.com/djgpp. */ |
| 628 | int |
| 629 | getitimer (int which, struct itimerval *value) |
| 630 | { |
| 631 | volatile ULONGLONG *t_expire; |
| 632 | volatile ULONGLONG *t_reload; |
| 633 | ULONGLONG expire, reload; |
| 634 | __int64 usecs; |
| 635 | CRITICAL_SECTION *crit; |
| 636 | struct itimer_data *itimer; |
| 637 | |
| 638 | if (disable_itimers) |
| 639 | return -1; |
| 640 | |
| 641 | if (!value) |
| 642 | { |
| 643 | errno = EFAULT; |
| 644 | return -1; |
| 645 | } |
| 646 | |
| 647 | if (which != ITIMER_REAL && which != ITIMER_PROF) |
| 648 | { |
| 649 | errno = EINVAL; |
| 650 | return -1; |
| 651 | } |
| 652 | |
| 653 | itimer = (which == ITIMER_REAL) ? &real_itimer : &prof_itimer; |
| 654 | |
| 655 | ticks_now = w32_get_timer_time ((which == ITIMER_REAL) |
| 656 | ? NULL |
| 657 | : GetCurrentThread ()); |
| 658 | |
| 659 | t_expire = &itimer->expire; |
| 660 | t_reload = &itimer->reload; |
| 661 | crit = (which == ITIMER_REAL) ? &crit_real : &crit_prof; |
| 662 | |
| 663 | EnterCriticalSection (crit); |
| 664 | reload = *t_reload; |
| 665 | expire = *t_expire; |
| 666 | LeaveCriticalSection (crit); |
| 667 | |
| 668 | if (expire) |
| 669 | expire -= ticks_now; |
| 670 | |
| 671 | value->it_value.tv_sec = expire / TIMER_TICKS_PER_SEC; |
| 672 | usecs = |
| 673 | (expire % TIMER_TICKS_PER_SEC) * (__int64)1000000 / TIMER_TICKS_PER_SEC; |
| 674 | value->it_value.tv_usec = usecs; |
| 675 | value->it_interval.tv_sec = reload / TIMER_TICKS_PER_SEC; |
| 676 | usecs = |
| 677 | (reload % TIMER_TICKS_PER_SEC) * (__int64)1000000 / TIMER_TICKS_PER_SEC; |
| 678 | value->it_interval.tv_usec= usecs; |
| 679 | |
| 680 | return 0; |
| 681 | } |
| 682 | |
| 683 | int |
| 684 | setitimer(int which, struct itimerval *value, struct itimerval *ovalue) |
| 685 | { |
| 686 | volatile ULONGLONG *t_expire, *t_reload; |
| 687 | ULONGLONG expire, reload, expire_old, reload_old; |
| 688 | __int64 usecs; |
| 689 | CRITICAL_SECTION *crit; |
| 690 | struct itimerval tem, *ptem; |
| 691 | |
| 692 | if (disable_itimers) |
| 693 | return -1; |
| 694 | |
| 695 | /* Posix systems expect timer values smaller than the resolution of |
| 696 | the system clock be rounded up to the clock resolution. First |
| 697 | time we are called, measure the clock tick resolution. */ |
| 698 | if (!clocks_min) |
| 699 | { |
| 700 | ULONGLONG t1, t2; |
| 701 | |
| 702 | for (t1 = w32_get_timer_time (NULL); |
| 703 | (t2 = w32_get_timer_time (NULL)) == t1; ) |
| 704 | ; |
| 705 | clocks_min = t2 - t1; |
| 706 | } |
| 707 | |
| 708 | if (ovalue) |
| 709 | ptem = ovalue; |
| 710 | else |
| 711 | ptem = &tem; |
| 712 | |
| 713 | if (getitimer (which, ptem)) /* also sets ticks_now */ |
| 714 | return -1; /* errno already set */ |
| 715 | |
| 716 | t_expire = |
| 717 | (which == ITIMER_REAL) ? &real_itimer.expire : &prof_itimer.expire; |
| 718 | t_reload = |
| 719 | (which == ITIMER_REAL) ? &real_itimer.reload : &prof_itimer.reload; |
| 720 | |
| 721 | crit = (which == ITIMER_REAL) ? &crit_real : &crit_prof; |
| 722 | |
| 723 | if (!value |
| 724 | || (value->it_value.tv_sec == 0 && value->it_value.tv_usec == 0)) |
| 725 | { |
| 726 | EnterCriticalSection (crit); |
| 727 | /* Disable the timer. */ |
| 728 | *t_expire = 0; |
| 729 | *t_reload = 0; |
| 730 | LeaveCriticalSection (crit); |
| 731 | return 0; |
| 732 | } |
| 733 | |
| 734 | reload = value->it_interval.tv_sec * TIMER_TICKS_PER_SEC; |
| 735 | |
| 736 | usecs = value->it_interval.tv_usec; |
| 737 | if (value->it_interval.tv_sec == 0 |
| 738 | && usecs && usecs * TIMER_TICKS_PER_SEC < clocks_min * 1000000) |
| 739 | reload = clocks_min; |
| 740 | else |
| 741 | { |
| 742 | usecs *= TIMER_TICKS_PER_SEC; |
| 743 | reload += usecs / 1000000; |
| 744 | } |
| 745 | |
| 746 | expire = value->it_value.tv_sec * TIMER_TICKS_PER_SEC; |
| 747 | usecs = value->it_value.tv_usec; |
| 748 | if (value->it_value.tv_sec == 0 |
| 749 | && usecs * TIMER_TICKS_PER_SEC < clocks_min * 1000000) |
| 750 | expire = clocks_min; |
| 751 | else |
| 752 | { |
| 753 | usecs *= TIMER_TICKS_PER_SEC; |
| 754 | expire += usecs / 1000000; |
| 755 | } |
| 756 | |
| 757 | expire += ticks_now; |
| 758 | |
| 759 | EnterCriticalSection (crit); |
| 760 | expire_old = *t_expire; |
| 761 | reload_old = *t_reload; |
| 762 | if (!(expire == expire_old && reload == reload_old)) |
| 763 | { |
| 764 | *t_reload = reload; |
| 765 | *t_expire = expire; |
| 766 | } |
| 767 | LeaveCriticalSection (crit); |
| 768 | |
| 769 | return start_timer_thread (which); |
| 770 | } |
| 771 | |
| 772 | int |
| 773 | alarm (int seconds) |
| 774 | { |
| 775 | #ifdef HAVE_SETITIMER |
| 776 | struct itimerval new_values, old_values; |
| 777 | |
| 778 | new_values.it_value.tv_sec = seconds; |
| 779 | new_values.it_value.tv_usec = 0; |
| 780 | new_values.it_interval.tv_sec = new_values.it_interval.tv_usec = 0; |
| 781 | |
| 782 | if (setitimer (ITIMER_REAL, &new_values, &old_values) < 0) |
| 783 | return 0; |
| 784 | return old_values.it_value.tv_sec; |
| 785 | #else |
| 786 | return seconds; |
| 787 | #endif |
| 788 | } |
| 789 | |
| 790 | /* Defined in <process.h> which conflicts with the local copy */ |
| 791 | #define _P_NOWAIT 1 |
| 792 | |
| 793 | /* Child process management list. */ |
| 794 | int child_proc_count = 0; |
| 795 | child_process child_procs[ MAX_CHILDREN ]; |
| 796 | |
| 797 | static DWORD WINAPI reader_thread (void *arg); |
| 798 | |
| 799 | /* Find an unused process slot. */ |
| 800 | child_process * |
| 801 | new_child (void) |
| 802 | { |
| 803 | child_process *cp; |
| 804 | DWORD id; |
| 805 | |
| 806 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
| 807 | if (!CHILD_ACTIVE (cp) && cp->procinfo.hProcess == NULL) |
| 808 | goto Initialize; |
| 809 | if (child_proc_count == MAX_CHILDREN) |
| 810 | { |
| 811 | int i = 0; |
| 812 | child_process *dead_cp = NULL; |
| 813 | |
| 814 | DebPrint (("new_child: No vacant slots, looking for dead processes\n")); |
| 815 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
| 816 | if (!CHILD_ACTIVE (cp) && cp->procinfo.hProcess) |
| 817 | { |
| 818 | DWORD status = 0; |
| 819 | |
| 820 | if (!GetExitCodeProcess (cp->procinfo.hProcess, &status)) |
| 821 | { |
| 822 | DebPrint (("new_child.GetExitCodeProcess: error %lu for PID %lu\n", |
| 823 | GetLastError (), cp->procinfo.dwProcessId)); |
| 824 | status = STILL_ACTIVE; |
| 825 | } |
| 826 | if (status != STILL_ACTIVE |
| 827 | || WaitForSingleObject (cp->procinfo.hProcess, 0) == WAIT_OBJECT_0) |
| 828 | { |
| 829 | DebPrint (("new_child: Freeing slot of dead process %d, fd %d\n", |
| 830 | cp->procinfo.dwProcessId, cp->fd)); |
| 831 | CloseHandle (cp->procinfo.hProcess); |
| 832 | cp->procinfo.hProcess = NULL; |
| 833 | CloseHandle (cp->procinfo.hThread); |
| 834 | cp->procinfo.hThread = NULL; |
| 835 | /* Free up to 2 dead slots at a time, so that if we |
| 836 | have a lot of them, they will eventually all be |
| 837 | freed when the tornado ends. */ |
| 838 | if (i == 0) |
| 839 | dead_cp = cp; |
| 840 | else |
| 841 | break; |
| 842 | i++; |
| 843 | } |
| 844 | } |
| 845 | if (dead_cp) |
| 846 | { |
| 847 | cp = dead_cp; |
| 848 | goto Initialize; |
| 849 | } |
| 850 | } |
| 851 | if (child_proc_count == MAX_CHILDREN) |
| 852 | return NULL; |
| 853 | cp = &child_procs[child_proc_count++]; |
| 854 | |
| 855 | Initialize: |
| 856 | /* Last opportunity to avoid leaking handles before we forget them |
| 857 | for good. */ |
| 858 | if (cp->procinfo.hProcess) |
| 859 | CloseHandle (cp->procinfo.hProcess); |
| 860 | if (cp->procinfo.hThread) |
| 861 | CloseHandle (cp->procinfo.hThread); |
| 862 | memset (cp, 0, sizeof (*cp)); |
| 863 | cp->fd = -1; |
| 864 | cp->pid = -1; |
| 865 | cp->procinfo.hProcess = NULL; |
| 866 | cp->status = STATUS_READ_ERROR; |
| 867 | |
| 868 | /* use manual reset event so that select() will function properly */ |
| 869 | cp->char_avail = CreateEvent (NULL, TRUE, FALSE, NULL); |
| 870 | if (cp->char_avail) |
| 871 | { |
| 872 | cp->char_consumed = CreateEvent (NULL, FALSE, FALSE, NULL); |
| 873 | if (cp->char_consumed) |
| 874 | { |
| 875 | /* The 0x00010000 flag is STACK_SIZE_PARAM_IS_A_RESERVATION. |
| 876 | It means that the 64K stack we are requesting in the 2nd |
| 877 | argument is how much memory should be reserved for the |
| 878 | stack. If we don't use this flag, the memory requested |
| 879 | by the 2nd argument is the amount actually _committed_, |
| 880 | but Windows reserves 8MB of memory for each thread's |
| 881 | stack. (The 8MB figure comes from the -stack |
| 882 | command-line argument we pass to the linker when building |
| 883 | Emacs, but that's because we need a large stack for |
| 884 | Emacs's main thread.) Since we request 2GB of reserved |
| 885 | memory at startup (see w32heap.c), which is close to the |
| 886 | maximum memory available for a 32-bit process on Windows, |
| 887 | the 8MB reservation for each thread causes failures in |
| 888 | starting subprocesses, because we create a thread running |
| 889 | reader_thread for each subprocess. As 8MB of stack is |
| 890 | way too much for reader_thread, forcing Windows to |
| 891 | reserve less wins the day. */ |
| 892 | cp->thrd = CreateThread (NULL, 64 * 1024, reader_thread, cp, |
| 893 | 0x00010000, &id); |
| 894 | if (cp->thrd) |
| 895 | return cp; |
| 896 | } |
| 897 | } |
| 898 | delete_child (cp); |
| 899 | return NULL; |
| 900 | } |
| 901 | |
| 902 | void |
| 903 | delete_child (child_process *cp) |
| 904 | { |
| 905 | int i; |
| 906 | |
| 907 | /* Should not be deleting a child that is still needed. */ |
| 908 | for (i = 0; i < MAXDESC; i++) |
| 909 | if (fd_info[i].cp == cp) |
| 910 | emacs_abort (); |
| 911 | |
| 912 | if (!CHILD_ACTIVE (cp) && cp->procinfo.hProcess == NULL) |
| 913 | return; |
| 914 | |
| 915 | /* reap thread if necessary */ |
| 916 | if (cp->thrd) |
| 917 | { |
| 918 | DWORD rc; |
| 919 | |
| 920 | if (GetExitCodeThread (cp->thrd, &rc) && rc == STILL_ACTIVE) |
| 921 | { |
| 922 | /* let the thread exit cleanly if possible */ |
| 923 | cp->status = STATUS_READ_ERROR; |
| 924 | SetEvent (cp->char_consumed); |
| 925 | #if 0 |
| 926 | /* We used to forcibly terminate the thread here, but it |
| 927 | is normally unnecessary, and in abnormal cases, the worst that |
| 928 | will happen is we have an extra idle thread hanging around |
| 929 | waiting for the zombie process. */ |
| 930 | if (WaitForSingleObject (cp->thrd, 1000) != WAIT_OBJECT_0) |
| 931 | { |
| 932 | DebPrint (("delete_child.WaitForSingleObject (thread) failed " |
| 933 | "with %lu for fd %ld\n", GetLastError (), cp->fd)); |
| 934 | TerminateThread (cp->thrd, 0); |
| 935 | } |
| 936 | #endif |
| 937 | } |
| 938 | CloseHandle (cp->thrd); |
| 939 | cp->thrd = NULL; |
| 940 | } |
| 941 | if (cp->char_avail) |
| 942 | { |
| 943 | CloseHandle (cp->char_avail); |
| 944 | cp->char_avail = NULL; |
| 945 | } |
| 946 | if (cp->char_consumed) |
| 947 | { |
| 948 | CloseHandle (cp->char_consumed); |
| 949 | cp->char_consumed = NULL; |
| 950 | } |
| 951 | |
| 952 | /* update child_proc_count (highest numbered slot in use plus one) */ |
| 953 | if (cp == child_procs + child_proc_count - 1) |
| 954 | { |
| 955 | for (i = child_proc_count-1; i >= 0; i--) |
| 956 | if (CHILD_ACTIVE (&child_procs[i]) |
| 957 | || child_procs[i].procinfo.hProcess != NULL) |
| 958 | { |
| 959 | child_proc_count = i + 1; |
| 960 | break; |
| 961 | } |
| 962 | } |
| 963 | if (i < 0) |
| 964 | child_proc_count = 0; |
| 965 | } |
| 966 | |
| 967 | /* Find a child by pid. */ |
| 968 | static child_process * |
| 969 | find_child_pid (DWORD pid) |
| 970 | { |
| 971 | child_process *cp; |
| 972 | |
| 973 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
| 974 | if ((CHILD_ACTIVE (cp) || cp->procinfo.hProcess != NULL) |
| 975 | && pid == cp->pid) |
| 976 | return cp; |
| 977 | return NULL; |
| 978 | } |
| 979 | |
| 980 | void |
| 981 | release_listen_threads (void) |
| 982 | { |
| 983 | int i; |
| 984 | |
| 985 | for (i = child_proc_count - 1; i >= 0; i--) |
| 986 | { |
| 987 | if (CHILD_ACTIVE (&child_procs[i]) |
| 988 | && (fd_info[child_procs[i].fd].flags & FILE_LISTEN)) |
| 989 | child_procs[i].status = STATUS_READ_ERROR; |
| 990 | } |
| 991 | } |
| 992 | |
| 993 | /* Thread proc for child process and socket reader threads. Each thread |
| 994 | is normally blocked until woken by select() to check for input by |
| 995 | reading one char. When the read completes, char_avail is signaled |
| 996 | to wake up the select emulator and the thread blocks itself again. */ |
| 997 | static DWORD WINAPI |
| 998 | reader_thread (void *arg) |
| 999 | { |
| 1000 | child_process *cp; |
| 1001 | |
| 1002 | /* Our identity */ |
| 1003 | cp = (child_process *)arg; |
| 1004 | |
| 1005 | /* We have to wait for the go-ahead before we can start */ |
| 1006 | if (cp == NULL |
| 1007 | || WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0 |
| 1008 | || cp->fd < 0) |
| 1009 | return 1; |
| 1010 | |
| 1011 | for (;;) |
| 1012 | { |
| 1013 | int rc; |
| 1014 | |
| 1015 | if (cp->fd >= 0 && fd_info[cp->fd].flags & FILE_LISTEN) |
| 1016 | rc = _sys_wait_accept (cp->fd); |
| 1017 | else |
| 1018 | rc = _sys_read_ahead (cp->fd); |
| 1019 | |
| 1020 | /* Don't bother waiting for the event if we already have been |
| 1021 | told to exit by delete_child. */ |
| 1022 | if (cp->status == STATUS_READ_ERROR || !cp->char_avail) |
| 1023 | break; |
| 1024 | |
| 1025 | /* The name char_avail is a misnomer - it really just means the |
| 1026 | read-ahead has completed, whether successfully or not. */ |
| 1027 | if (!SetEvent (cp->char_avail)) |
| 1028 | { |
| 1029 | DebPrint (("reader_thread.SetEvent(0x%x) failed with %lu for fd %ld (PID %d)\n", |
| 1030 | (DWORD_PTR)cp->char_avail, GetLastError (), |
| 1031 | cp->fd, cp->pid)); |
| 1032 | return 1; |
| 1033 | } |
| 1034 | |
| 1035 | if (rc == STATUS_READ_ERROR) |
| 1036 | return 1; |
| 1037 | |
| 1038 | /* If the read died, the child has died so let the thread die */ |
| 1039 | if (rc == STATUS_READ_FAILED) |
| 1040 | break; |
| 1041 | |
| 1042 | /* Don't bother waiting for the acknowledge if we already have |
| 1043 | been told to exit by delete_child. */ |
| 1044 | if (cp->status == STATUS_READ_ERROR || !cp->char_consumed) |
| 1045 | break; |
| 1046 | |
| 1047 | /* Wait until our input is acknowledged before reading again */ |
| 1048 | if (WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0) |
| 1049 | { |
| 1050 | DebPrint (("reader_thread.WaitForSingleObject failed with " |
| 1051 | "%lu for fd %ld\n", GetLastError (), cp->fd)); |
| 1052 | break; |
| 1053 | } |
| 1054 | /* delete_child sets status to STATUS_READ_ERROR when it wants |
| 1055 | us to exit. */ |
| 1056 | if (cp->status == STATUS_READ_ERROR) |
| 1057 | break; |
| 1058 | } |
| 1059 | return 0; |
| 1060 | } |
| 1061 | |
| 1062 | /* To avoid Emacs changing directory, we just record here the |
| 1063 | directory the new process should start in. This is set just before |
| 1064 | calling sys_spawnve, and is not generally valid at any other time. |
| 1065 | Note that this directory's name is UTF-8 encoded. */ |
| 1066 | static char * process_dir; |
| 1067 | |
| 1068 | static BOOL |
| 1069 | create_child (char *exe, char *cmdline, char *env, int is_gui_app, |
| 1070 | pid_t * pPid, child_process *cp) |
| 1071 | { |
| 1072 | STARTUPINFO start; |
| 1073 | SECURITY_ATTRIBUTES sec_attrs; |
| 1074 | #if 0 |
| 1075 | SECURITY_DESCRIPTOR sec_desc; |
| 1076 | #endif |
| 1077 | DWORD flags; |
| 1078 | char dir[ MAX_PATH ]; |
| 1079 | char *p; |
| 1080 | |
| 1081 | if (cp == NULL) emacs_abort (); |
| 1082 | |
| 1083 | memset (&start, 0, sizeof (start)); |
| 1084 | start.cb = sizeof (start); |
| 1085 | |
| 1086 | #ifdef HAVE_NTGUI |
| 1087 | if (NILP (Vw32_start_process_show_window) && !is_gui_app) |
| 1088 | start.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; |
| 1089 | else |
| 1090 | start.dwFlags = STARTF_USESTDHANDLES; |
| 1091 | start.wShowWindow = SW_HIDE; |
| 1092 | |
| 1093 | start.hStdInput = GetStdHandle (STD_INPUT_HANDLE); |
| 1094 | start.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE); |
| 1095 | start.hStdError = GetStdHandle (STD_ERROR_HANDLE); |
| 1096 | #endif /* HAVE_NTGUI */ |
| 1097 | |
| 1098 | #if 0 |
| 1099 | /* Explicitly specify no security */ |
| 1100 | if (!InitializeSecurityDescriptor (&sec_desc, SECURITY_DESCRIPTOR_REVISION)) |
| 1101 | goto EH_Fail; |
| 1102 | if (!SetSecurityDescriptorDacl (&sec_desc, TRUE, NULL, FALSE)) |
| 1103 | goto EH_Fail; |
| 1104 | #endif |
| 1105 | sec_attrs.nLength = sizeof (sec_attrs); |
| 1106 | sec_attrs.lpSecurityDescriptor = NULL /* &sec_desc */; |
| 1107 | sec_attrs.bInheritHandle = FALSE; |
| 1108 | |
| 1109 | filename_to_ansi (process_dir, dir); |
| 1110 | /* Can't use unixtodos_filename here, since that needs its file name |
| 1111 | argument encoded in UTF-8. OTOH, process_dir, which _is_ in |
| 1112 | UTF-8, points, to the directory computed by our caller, and we |
| 1113 | don't want to modify that, either. */ |
| 1114 | for (p = dir; *p; p = CharNextA (p)) |
| 1115 | if (*p == '/') |
| 1116 | *p = '\\'; |
| 1117 | |
| 1118 | flags = (!NILP (Vw32_start_process_share_console) |
| 1119 | ? CREATE_NEW_PROCESS_GROUP |
| 1120 | : CREATE_NEW_CONSOLE); |
| 1121 | if (NILP (Vw32_start_process_inherit_error_mode)) |
| 1122 | flags |= CREATE_DEFAULT_ERROR_MODE; |
| 1123 | if (!CreateProcessA (exe, cmdline, &sec_attrs, NULL, TRUE, |
| 1124 | flags, env, dir, &start, &cp->procinfo)) |
| 1125 | goto EH_Fail; |
| 1126 | |
| 1127 | cp->pid = (int) cp->procinfo.dwProcessId; |
| 1128 | |
| 1129 | /* Hack for Windows 95, which assigns large (ie negative) pids */ |
| 1130 | if (cp->pid < 0) |
| 1131 | cp->pid = -cp->pid; |
| 1132 | |
| 1133 | *pPid = cp->pid; |
| 1134 | |
| 1135 | return TRUE; |
| 1136 | |
| 1137 | EH_Fail: |
| 1138 | DebPrint (("create_child.CreateProcess failed: %ld\n", GetLastError ());); |
| 1139 | return FALSE; |
| 1140 | } |
| 1141 | |
| 1142 | /* create_child doesn't know what emacs's file handle will be for waiting |
| 1143 | on output from the child, so we need to make this additional call |
| 1144 | to register the handle with the process |
| 1145 | This way the select emulator knows how to match file handles with |
| 1146 | entries in child_procs. */ |
| 1147 | void |
| 1148 | register_child (pid_t pid, int fd) |
| 1149 | { |
| 1150 | child_process *cp; |
| 1151 | |
| 1152 | cp = find_child_pid ((DWORD)pid); |
| 1153 | if (cp == NULL) |
| 1154 | { |
| 1155 | DebPrint (("register_child unable to find pid %lu\n", pid)); |
| 1156 | return; |
| 1157 | } |
| 1158 | |
| 1159 | #ifdef FULL_DEBUG |
| 1160 | DebPrint (("register_child registered fd %d with pid %lu\n", fd, pid)); |
| 1161 | #endif |
| 1162 | |
| 1163 | cp->fd = fd; |
| 1164 | |
| 1165 | /* thread is initially blocked until select is called; set status so |
| 1166 | that select will release thread */ |
| 1167 | cp->status = STATUS_READ_ACKNOWLEDGED; |
| 1168 | |
| 1169 | /* attach child_process to fd_info */ |
| 1170 | if (fd_info[fd].cp != NULL) |
| 1171 | { |
| 1172 | DebPrint (("register_child: fd_info[%d] apparently in use!\n", fd)); |
| 1173 | emacs_abort (); |
| 1174 | } |
| 1175 | |
| 1176 | fd_info[fd].cp = cp; |
| 1177 | } |
| 1178 | |
| 1179 | /* Called from waitpid when a process exits. */ |
| 1180 | static void |
| 1181 | reap_subprocess (child_process *cp) |
| 1182 | { |
| 1183 | if (cp->procinfo.hProcess) |
| 1184 | { |
| 1185 | /* Reap the process */ |
| 1186 | #ifdef FULL_DEBUG |
| 1187 | /* Process should have already died before we are called. */ |
| 1188 | if (WaitForSingleObject (cp->procinfo.hProcess, 0) != WAIT_OBJECT_0) |
| 1189 | DebPrint (("reap_subprocess: child for fd %d has not died yet!", cp->fd)); |
| 1190 | #endif |
| 1191 | CloseHandle (cp->procinfo.hProcess); |
| 1192 | cp->procinfo.hProcess = NULL; |
| 1193 | CloseHandle (cp->procinfo.hThread); |
| 1194 | cp->procinfo.hThread = NULL; |
| 1195 | } |
| 1196 | |
| 1197 | /* If cp->fd was not closed yet, we might be still reading the |
| 1198 | process output, so don't free its resources just yet. The call |
| 1199 | to delete_child on behalf of this subprocess will be made by |
| 1200 | sys_read when the subprocess output is fully read. */ |
| 1201 | if (cp->fd < 0) |
| 1202 | delete_child (cp); |
| 1203 | } |
| 1204 | |
| 1205 | /* Wait for a child process specified by PID, or for any of our |
| 1206 | existing child processes (if PID is nonpositive) to die. When it |
| 1207 | does, close its handle. Return the pid of the process that died |
| 1208 | and fill in STATUS if non-NULL. */ |
| 1209 | |
| 1210 | pid_t |
| 1211 | waitpid (pid_t pid, int *status, int options) |
| 1212 | { |
| 1213 | DWORD active, retval; |
| 1214 | int nh; |
| 1215 | child_process *cp, *cps[MAX_CHILDREN]; |
| 1216 | HANDLE wait_hnd[MAX_CHILDREN]; |
| 1217 | DWORD timeout_ms; |
| 1218 | int dont_wait = (options & WNOHANG) != 0; |
| 1219 | |
| 1220 | nh = 0; |
| 1221 | /* According to Posix: |
| 1222 | |
| 1223 | PID = -1 means status is requested for any child process. |
| 1224 | |
| 1225 | PID > 0 means status is requested for a single child process |
| 1226 | whose pid is PID. |
| 1227 | |
| 1228 | PID = 0 means status is requested for any child process whose |
| 1229 | process group ID is equal to that of the calling process. But |
| 1230 | since Windows has only a limited support for process groups (only |
| 1231 | for console processes and only for the purposes of passing |
| 1232 | Ctrl-BREAK signal to them), and since we have no documented way |
| 1233 | of determining whether a given process belongs to our group, we |
| 1234 | treat 0 as -1. |
| 1235 | |
| 1236 | PID < -1 means status is requested for any child process whose |
| 1237 | process group ID is equal to the absolute value of PID. Again, |
| 1238 | since we don't support process groups, we treat that as -1. */ |
| 1239 | if (pid > 0) |
| 1240 | { |
| 1241 | int our_child = 0; |
| 1242 | |
| 1243 | /* We are requested to wait for a specific child. */ |
| 1244 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
| 1245 | { |
| 1246 | /* Some child_procs might be sockets; ignore them. Also |
| 1247 | ignore subprocesses whose output is not yet completely |
| 1248 | read. */ |
| 1249 | if (CHILD_ACTIVE (cp) |
| 1250 | && cp->procinfo.hProcess |
| 1251 | && cp->pid == pid) |
| 1252 | { |
| 1253 | our_child = 1; |
| 1254 | break; |
| 1255 | } |
| 1256 | } |
| 1257 | if (our_child) |
| 1258 | { |
| 1259 | if (cp->fd < 0 || (fd_info[cp->fd].flags & FILE_AT_EOF) != 0) |
| 1260 | { |
| 1261 | wait_hnd[nh] = cp->procinfo.hProcess; |
| 1262 | cps[nh] = cp; |
| 1263 | nh++; |
| 1264 | } |
| 1265 | else if (dont_wait) |
| 1266 | { |
| 1267 | /* PID specifies our subprocess, but its status is not |
| 1268 | yet available. */ |
| 1269 | return 0; |
| 1270 | } |
| 1271 | } |
| 1272 | if (nh == 0) |
| 1273 | { |
| 1274 | /* No such child process, or nothing to wait for, so fail. */ |
| 1275 | errno = ECHILD; |
| 1276 | return -1; |
| 1277 | } |
| 1278 | } |
| 1279 | else |
| 1280 | { |
| 1281 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
| 1282 | { |
| 1283 | if (CHILD_ACTIVE (cp) |
| 1284 | && cp->procinfo.hProcess |
| 1285 | && (cp->fd < 0 || (fd_info[cp->fd].flags & FILE_AT_EOF) != 0)) |
| 1286 | { |
| 1287 | wait_hnd[nh] = cp->procinfo.hProcess; |
| 1288 | cps[nh] = cp; |
| 1289 | nh++; |
| 1290 | } |
| 1291 | } |
| 1292 | if (nh == 0) |
| 1293 | { |
| 1294 | /* Nothing to wait on, so fail. */ |
| 1295 | errno = ECHILD; |
| 1296 | return -1; |
| 1297 | } |
| 1298 | } |
| 1299 | |
| 1300 | if (dont_wait) |
| 1301 | timeout_ms = 0; |
| 1302 | else |
| 1303 | timeout_ms = 1000; /* check for quit about once a second. */ |
| 1304 | |
| 1305 | do |
| 1306 | { |
| 1307 | QUIT; |
| 1308 | active = WaitForMultipleObjects (nh, wait_hnd, FALSE, timeout_ms); |
| 1309 | } while (active == WAIT_TIMEOUT && !dont_wait); |
| 1310 | |
| 1311 | if (active == WAIT_FAILED) |
| 1312 | { |
| 1313 | errno = EBADF; |
| 1314 | return -1; |
| 1315 | } |
| 1316 | else if (active == WAIT_TIMEOUT && dont_wait) |
| 1317 | { |
| 1318 | /* PID specifies our subprocess, but it didn't exit yet, so its |
| 1319 | status is not yet available. */ |
| 1320 | #ifdef FULL_DEBUG |
| 1321 | DebPrint (("Wait: PID %d not reap yet\n", cp->pid)); |
| 1322 | #endif |
| 1323 | return 0; |
| 1324 | } |
| 1325 | else if (active >= WAIT_OBJECT_0 |
| 1326 | && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) |
| 1327 | { |
| 1328 | active -= WAIT_OBJECT_0; |
| 1329 | } |
| 1330 | else if (active >= WAIT_ABANDONED_0 |
| 1331 | && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) |
| 1332 | { |
| 1333 | active -= WAIT_ABANDONED_0; |
| 1334 | } |
| 1335 | else |
| 1336 | emacs_abort (); |
| 1337 | |
| 1338 | if (!GetExitCodeProcess (wait_hnd[active], &retval)) |
| 1339 | { |
| 1340 | DebPrint (("Wait.GetExitCodeProcess failed with %lu\n", |
| 1341 | GetLastError ())); |
| 1342 | retval = 1; |
| 1343 | } |
| 1344 | if (retval == STILL_ACTIVE) |
| 1345 | { |
| 1346 | /* Should never happen. */ |
| 1347 | DebPrint (("Wait.WaitForMultipleObjects returned an active process\n")); |
| 1348 | if (pid > 0 && dont_wait) |
| 1349 | return 0; |
| 1350 | errno = EINVAL; |
| 1351 | return -1; |
| 1352 | } |
| 1353 | |
| 1354 | /* Massage the exit code from the process to match the format expected |
| 1355 | by the WIFSTOPPED et al macros in syswait.h. Only WIFSIGNALED and |
| 1356 | WIFEXITED are supported; WIFSTOPPED doesn't make sense under NT. */ |
| 1357 | |
| 1358 | if (retval == STATUS_CONTROL_C_EXIT) |
| 1359 | retval = SIGINT; |
| 1360 | else |
| 1361 | retval <<= 8; |
| 1362 | |
| 1363 | if (pid > 0 && active != 0) |
| 1364 | emacs_abort (); |
| 1365 | cp = cps[active]; |
| 1366 | pid = cp->pid; |
| 1367 | #ifdef FULL_DEBUG |
| 1368 | DebPrint (("Wait signaled with process pid %d\n", cp->pid)); |
| 1369 | #endif |
| 1370 | |
| 1371 | if (status) |
| 1372 | *status = retval; |
| 1373 | reap_subprocess (cp); |
| 1374 | |
| 1375 | return pid; |
| 1376 | } |
| 1377 | |
| 1378 | /* Old versions of w32api headers don't have separate 32-bit and |
| 1379 | 64-bit defines, but the one they have matches the 32-bit variety. */ |
| 1380 | #ifndef IMAGE_NT_OPTIONAL_HDR32_MAGIC |
| 1381 | # define IMAGE_NT_OPTIONAL_HDR32_MAGIC IMAGE_NT_OPTIONAL_HDR_MAGIC |
| 1382 | # define IMAGE_OPTIONAL_HEADER32 IMAGE_OPTIONAL_HEADER |
| 1383 | #endif |
| 1384 | |
| 1385 | /* Implementation note: This function works with file names encoded in |
| 1386 | the current ANSI codepage. */ |
| 1387 | static void |
| 1388 | w32_executable_type (char * filename, |
| 1389 | int * is_dos_app, |
| 1390 | int * is_cygnus_app, |
| 1391 | int * is_gui_app) |
| 1392 | { |
| 1393 | file_data executable; |
| 1394 | char * p; |
| 1395 | |
| 1396 | /* Default values in case we can't tell for sure. */ |
| 1397 | *is_dos_app = FALSE; |
| 1398 | *is_cygnus_app = FALSE; |
| 1399 | *is_gui_app = FALSE; |
| 1400 | |
| 1401 | if (!open_input_file (&executable, filename)) |
| 1402 | return; |
| 1403 | |
| 1404 | p = strrchr (filename, '.'); |
| 1405 | |
| 1406 | /* We can only identify DOS .com programs from the extension. */ |
| 1407 | if (p && xstrcasecmp (p, ".com") == 0) |
| 1408 | *is_dos_app = TRUE; |
| 1409 | else if (p && (xstrcasecmp (p, ".bat") == 0 |
| 1410 | || xstrcasecmp (p, ".cmd") == 0)) |
| 1411 | { |
| 1412 | /* A DOS shell script - it appears that CreateProcess is happy to |
| 1413 | accept this (somewhat surprisingly); presumably it looks at |
| 1414 | COMSPEC to determine what executable to actually invoke. |
| 1415 | Therefore, we have to do the same here as well. */ |
| 1416 | /* Actually, I think it uses the program association for that |
| 1417 | extension, which is defined in the registry. */ |
| 1418 | p = egetenv ("COMSPEC"); |
| 1419 | if (p) |
| 1420 | w32_executable_type (p, is_dos_app, is_cygnus_app, is_gui_app); |
| 1421 | } |
| 1422 | else |
| 1423 | { |
| 1424 | /* Look for DOS .exe signature - if found, we must also check that |
| 1425 | it isn't really a 16- or 32-bit Windows exe, since both formats |
| 1426 | start with a DOS program stub. Note that 16-bit Windows |
| 1427 | executables use the OS/2 1.x format. */ |
| 1428 | |
| 1429 | IMAGE_DOS_HEADER * dos_header; |
| 1430 | IMAGE_NT_HEADERS * nt_header; |
| 1431 | |
| 1432 | dos_header = (PIMAGE_DOS_HEADER) executable.file_base; |
| 1433 | if (dos_header->e_magic != IMAGE_DOS_SIGNATURE) |
| 1434 | goto unwind; |
| 1435 | |
| 1436 | nt_header = (PIMAGE_NT_HEADERS) ((unsigned char *) dos_header + dos_header->e_lfanew); |
| 1437 | |
| 1438 | if ((char *) nt_header > (char *) dos_header + executable.size) |
| 1439 | { |
| 1440 | /* Some dos headers (pkunzip) have bogus e_lfanew fields. */ |
| 1441 | *is_dos_app = TRUE; |
| 1442 | } |
| 1443 | else if (nt_header->Signature != IMAGE_NT_SIGNATURE |
| 1444 | && LOWORD (nt_header->Signature) != IMAGE_OS2_SIGNATURE) |
| 1445 | { |
| 1446 | *is_dos_app = TRUE; |
| 1447 | } |
| 1448 | else if (nt_header->Signature == IMAGE_NT_SIGNATURE) |
| 1449 | { |
| 1450 | IMAGE_DATA_DIRECTORY *data_dir = NULL; |
| 1451 | if (nt_header->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC) |
| 1452 | { |
| 1453 | /* Ensure we are using the 32 bit structure. */ |
| 1454 | IMAGE_OPTIONAL_HEADER32 *opt |
| 1455 | = (IMAGE_OPTIONAL_HEADER32*) &(nt_header->OptionalHeader); |
| 1456 | data_dir = opt->DataDirectory; |
| 1457 | *is_gui_app = (opt->Subsystem == IMAGE_SUBSYSTEM_WINDOWS_GUI); |
| 1458 | } |
| 1459 | /* MingW 3.12 has the required 64 bit structs, but in case older |
| 1460 | versions don't, only check 64 bit exes if we know how. */ |
| 1461 | #ifdef IMAGE_NT_OPTIONAL_HDR64_MAGIC |
| 1462 | else if (nt_header->OptionalHeader.Magic |
| 1463 | == IMAGE_NT_OPTIONAL_HDR64_MAGIC) |
| 1464 | { |
| 1465 | IMAGE_OPTIONAL_HEADER64 *opt |
| 1466 | = (IMAGE_OPTIONAL_HEADER64*) &(nt_header->OptionalHeader); |
| 1467 | data_dir = opt->DataDirectory; |
| 1468 | *is_gui_app = (opt->Subsystem == IMAGE_SUBSYSTEM_WINDOWS_GUI); |
| 1469 | } |
| 1470 | #endif |
| 1471 | if (data_dir) |
| 1472 | { |
| 1473 | /* Look for cygwin.dll in DLL import list. */ |
| 1474 | IMAGE_DATA_DIRECTORY import_dir = |
| 1475 | data_dir[IMAGE_DIRECTORY_ENTRY_IMPORT]; |
| 1476 | IMAGE_IMPORT_DESCRIPTOR * imports; |
| 1477 | IMAGE_SECTION_HEADER * section; |
| 1478 | |
| 1479 | section = rva_to_section (import_dir.VirtualAddress, nt_header); |
| 1480 | imports = RVA_TO_PTR (import_dir.VirtualAddress, section, |
| 1481 | executable); |
| 1482 | |
| 1483 | for ( ; imports->Name; imports++) |
| 1484 | { |
| 1485 | char * dllname = RVA_TO_PTR (imports->Name, section, |
| 1486 | executable); |
| 1487 | |
| 1488 | /* The exact name of the cygwin dll has changed with |
| 1489 | various releases, but hopefully this will be reasonably |
| 1490 | future proof. */ |
| 1491 | if (strncmp (dllname, "cygwin", 6) == 0) |
| 1492 | { |
| 1493 | *is_cygnus_app = TRUE; |
| 1494 | break; |
| 1495 | } |
| 1496 | } |
| 1497 | } |
| 1498 | } |
| 1499 | } |
| 1500 | |
| 1501 | unwind: |
| 1502 | close_file_data (&executable); |
| 1503 | } |
| 1504 | |
| 1505 | static int |
| 1506 | compare_env (const void *strp1, const void *strp2) |
| 1507 | { |
| 1508 | const char *str1 = *(const char **)strp1, *str2 = *(const char **)strp2; |
| 1509 | |
| 1510 | while (*str1 && *str2 && *str1 != '=' && *str2 != '=') |
| 1511 | { |
| 1512 | /* Sort order in command.com/cmd.exe is based on uppercasing |
| 1513 | names, so do the same here. */ |
| 1514 | if (toupper (*str1) > toupper (*str2)) |
| 1515 | return 1; |
| 1516 | else if (toupper (*str1) < toupper (*str2)) |
| 1517 | return -1; |
| 1518 | str1++, str2++; |
| 1519 | } |
| 1520 | |
| 1521 | if (*str1 == '=' && *str2 == '=') |
| 1522 | return 0; |
| 1523 | else if (*str1 == '=') |
| 1524 | return -1; |
| 1525 | else |
| 1526 | return 1; |
| 1527 | } |
| 1528 | |
| 1529 | static void |
| 1530 | merge_and_sort_env (char **envp1, char **envp2, char **new_envp) |
| 1531 | { |
| 1532 | char **optr, **nptr; |
| 1533 | int num; |
| 1534 | |
| 1535 | nptr = new_envp; |
| 1536 | optr = envp1; |
| 1537 | while (*optr) |
| 1538 | *nptr++ = *optr++; |
| 1539 | num = optr - envp1; |
| 1540 | |
| 1541 | optr = envp2; |
| 1542 | while (*optr) |
| 1543 | *nptr++ = *optr++; |
| 1544 | num += optr - envp2; |
| 1545 | |
| 1546 | qsort (new_envp, num, sizeof (char *), compare_env); |
| 1547 | |
| 1548 | *nptr = NULL; |
| 1549 | } |
| 1550 | |
| 1551 | /* When a new child process is created we need to register it in our list, |
| 1552 | so intercept spawn requests. */ |
| 1553 | int |
| 1554 | sys_spawnve (int mode, char *cmdname, char **argv, char **envp) |
| 1555 | { |
| 1556 | Lisp_Object program, full; |
| 1557 | char *cmdline, *env, *parg, **targ; |
| 1558 | int arglen, numenv; |
| 1559 | pid_t pid; |
| 1560 | child_process *cp; |
| 1561 | int is_dos_app, is_cygnus_app, is_gui_app; |
| 1562 | int do_quoting = 0; |
| 1563 | /* We pass our process ID to our children by setting up an environment |
| 1564 | variable in their environment. */ |
| 1565 | char ppid_env_var_buffer[64]; |
| 1566 | char *extra_env[] = {ppid_env_var_buffer, NULL}; |
| 1567 | /* These are the characters that cause an argument to need quoting. |
| 1568 | Arguments with whitespace characters need quoting to prevent the |
| 1569 | argument being split into two or more. Arguments with wildcards |
| 1570 | are also quoted, for consistency with posix platforms, where wildcards |
| 1571 | are not expanded if we run the program directly without a shell. |
| 1572 | Some extra whitespace characters need quoting in Cygwin programs, |
| 1573 | so this list is conditionally modified below. */ |
| 1574 | char *sepchars = " \t*?"; |
| 1575 | /* This is for native w32 apps; modified below for Cygwin apps. */ |
| 1576 | char escape_char = '\\'; |
| 1577 | char cmdname_a[MAX_PATH]; |
| 1578 | |
| 1579 | /* We don't care about the other modes */ |
| 1580 | if (mode != _P_NOWAIT) |
| 1581 | { |
| 1582 | errno = EINVAL; |
| 1583 | return -1; |
| 1584 | } |
| 1585 | |
| 1586 | /* Handle executable names without an executable suffix. The caller |
| 1587 | already searched exec-path and verified the file is executable, |
| 1588 | but start-process doesn't do that for file names that are already |
| 1589 | absolute. So we double-check this here, just in case. */ |
| 1590 | if (faccessat (AT_FDCWD, cmdname, X_OK, AT_EACCESS) != 0) |
| 1591 | { |
| 1592 | struct gcpro gcpro1; |
| 1593 | |
| 1594 | program = build_string (cmdname); |
| 1595 | full = Qnil; |
| 1596 | GCPRO1 (program); |
| 1597 | openp (Vexec_path, program, Vexec_suffixes, &full, make_number (X_OK), 0); |
| 1598 | UNGCPRO; |
| 1599 | if (NILP (full)) |
| 1600 | { |
| 1601 | errno = EINVAL; |
| 1602 | return -1; |
| 1603 | } |
| 1604 | program = ENCODE_FILE (full); |
| 1605 | cmdname = SDATA (program); |
| 1606 | } |
| 1607 | |
| 1608 | /* make sure argv[0] and cmdname are both in DOS format */ |
| 1609 | unixtodos_filename (cmdname); |
| 1610 | /* argv[0] was encoded by caller using ENCODE_FILE, so it is in |
| 1611 | UTF-8. All the other arguments are encoded by ENCODE_SYSTEM or |
| 1612 | some such, and are in some ANSI codepage. We need to have |
| 1613 | argv[0] encoded in ANSI codepage. */ |
| 1614 | filename_to_ansi (cmdname, cmdname_a); |
| 1615 | /* We explicitly require that the command's file name be encodable |
| 1616 | in the current ANSI codepage, because we will be invoking it via |
| 1617 | the ANSI APIs. */ |
| 1618 | if (_mbspbrk (cmdname_a, "?")) |
| 1619 | { |
| 1620 | errno = ENOENT; |
| 1621 | return -1; |
| 1622 | } |
| 1623 | /* From here on, CMDNAME is an ANSI-encoded string. */ |
| 1624 | cmdname = cmdname_a; |
| 1625 | argv[0] = cmdname; |
| 1626 | |
| 1627 | /* Determine whether program is a 16-bit DOS executable, or a 32-bit Windows |
| 1628 | executable that is implicitly linked to the Cygnus dll (implying it |
| 1629 | was compiled with the Cygnus GNU toolchain and hence relies on |
| 1630 | cygwin.dll to parse the command line - we use this to decide how to |
| 1631 | escape quote chars in command line args that must be quoted). |
| 1632 | |
| 1633 | Also determine whether it is a GUI app, so that we don't hide its |
| 1634 | initial window unless specifically requested. */ |
| 1635 | w32_executable_type (cmdname, &is_dos_app, &is_cygnus_app, &is_gui_app); |
| 1636 | |
| 1637 | /* On Windows 95, if cmdname is a DOS app, we invoke a helper |
| 1638 | application to start it by specifying the helper app as cmdname, |
| 1639 | while leaving the real app name as argv[0]. */ |
| 1640 | if (is_dos_app) |
| 1641 | { |
| 1642 | char *p; |
| 1643 | |
| 1644 | cmdname = alloca (MAX_PATH); |
| 1645 | if (egetenv ("CMDPROXY")) |
| 1646 | strcpy (cmdname, egetenv ("CMDPROXY")); |
| 1647 | else |
| 1648 | { |
| 1649 | strcpy (cmdname, SDATA (Vinvocation_directory)); |
| 1650 | strcat (cmdname, "cmdproxy.exe"); |
| 1651 | } |
| 1652 | |
| 1653 | /* Can't use unixtodos_filename here, since that needs its file |
| 1654 | name argument encoded in UTF-8. */ |
| 1655 | for (p = cmdname; *p; p = CharNextA (p)) |
| 1656 | if (*p == '/') |
| 1657 | *p = '\\'; |
| 1658 | } |
| 1659 | |
| 1660 | /* we have to do some conjuring here to put argv and envp into the |
| 1661 | form CreateProcess wants... argv needs to be a space separated/null |
| 1662 | terminated list of parameters, and envp is a null |
| 1663 | separated/double-null terminated list of parameters. |
| 1664 | |
| 1665 | Additionally, zero-length args and args containing whitespace or |
| 1666 | quote chars need to be wrapped in double quotes - for this to work, |
| 1667 | embedded quotes need to be escaped as well. The aim is to ensure |
| 1668 | the child process reconstructs the argv array we start with |
| 1669 | exactly, so we treat quotes at the beginning and end of arguments |
| 1670 | as embedded quotes. |
| 1671 | |
| 1672 | The w32 GNU-based library from Cygnus doubles quotes to escape |
| 1673 | them, while MSVC uses backslash for escaping. (Actually the MSVC |
| 1674 | startup code does attempt to recognize doubled quotes and accept |
| 1675 | them, but gets it wrong and ends up requiring three quotes to get a |
| 1676 | single embedded quote!) So by default we decide whether to use |
| 1677 | quote or backslash as the escape character based on whether the |
| 1678 | binary is apparently a Cygnus compiled app. |
| 1679 | |
| 1680 | Note that using backslash to escape embedded quotes requires |
| 1681 | additional special handling if an embedded quote is already |
| 1682 | preceded by backslash, or if an arg requiring quoting ends with |
| 1683 | backslash. In such cases, the run of escape characters needs to be |
| 1684 | doubled. For consistency, we apply this special handling as long |
| 1685 | as the escape character is not quote. |
| 1686 | |
| 1687 | Since we have no idea how large argv and envp are likely to be we |
| 1688 | figure out list lengths on the fly and allocate them. */ |
| 1689 | |
| 1690 | if (!NILP (Vw32_quote_process_args)) |
| 1691 | { |
| 1692 | do_quoting = 1; |
| 1693 | /* Override escape char by binding w32-quote-process-args to |
| 1694 | desired character, or use t for auto-selection. */ |
| 1695 | if (INTEGERP (Vw32_quote_process_args)) |
| 1696 | escape_char = XINT (Vw32_quote_process_args); |
| 1697 | else |
| 1698 | escape_char = is_cygnus_app ? '"' : '\\'; |
| 1699 | } |
| 1700 | |
| 1701 | /* Cygwin apps needs quoting a bit more often. */ |
| 1702 | if (escape_char == '"') |
| 1703 | sepchars = "\r\n\t\f '"; |
| 1704 | |
| 1705 | /* do argv... */ |
| 1706 | arglen = 0; |
| 1707 | targ = argv; |
| 1708 | while (*targ) |
| 1709 | { |
| 1710 | char * p = *targ; |
| 1711 | int need_quotes = 0; |
| 1712 | int escape_char_run = 0; |
| 1713 | |
| 1714 | if (*p == 0) |
| 1715 | need_quotes = 1; |
| 1716 | for ( ; *p; p++) |
| 1717 | { |
| 1718 | if (escape_char == '"' && *p == '\\') |
| 1719 | /* If it's a Cygwin app, \ needs to be escaped. */ |
| 1720 | arglen++; |
| 1721 | else if (*p == '"') |
| 1722 | { |
| 1723 | /* allow for embedded quotes to be escaped */ |
| 1724 | arglen++; |
| 1725 | need_quotes = 1; |
| 1726 | /* handle the case where the embedded quote is already escaped */ |
| 1727 | if (escape_char_run > 0) |
| 1728 | { |
| 1729 | /* To preserve the arg exactly, we need to double the |
| 1730 | preceding escape characters (plus adding one to |
| 1731 | escape the quote character itself). */ |
| 1732 | arglen += escape_char_run; |
| 1733 | } |
| 1734 | } |
| 1735 | else if (strchr (sepchars, *p) != NULL) |
| 1736 | { |
| 1737 | need_quotes = 1; |
| 1738 | } |
| 1739 | |
| 1740 | if (*p == escape_char && escape_char != '"') |
| 1741 | escape_char_run++; |
| 1742 | else |
| 1743 | escape_char_run = 0; |
| 1744 | } |
| 1745 | if (need_quotes) |
| 1746 | { |
| 1747 | arglen += 2; |
| 1748 | /* handle the case where the arg ends with an escape char - we |
| 1749 | must not let the enclosing quote be escaped. */ |
| 1750 | if (escape_char_run > 0) |
| 1751 | arglen += escape_char_run; |
| 1752 | } |
| 1753 | arglen += strlen (*targ++) + 1; |
| 1754 | } |
| 1755 | cmdline = alloca (arglen); |
| 1756 | targ = argv; |
| 1757 | parg = cmdline; |
| 1758 | while (*targ) |
| 1759 | { |
| 1760 | char * p = *targ; |
| 1761 | int need_quotes = 0; |
| 1762 | |
| 1763 | if (*p == 0) |
| 1764 | need_quotes = 1; |
| 1765 | |
| 1766 | if (do_quoting) |
| 1767 | { |
| 1768 | for ( ; *p; p++) |
| 1769 | if ((strchr (sepchars, *p) != NULL) || *p == '"') |
| 1770 | need_quotes = 1; |
| 1771 | } |
| 1772 | if (need_quotes) |
| 1773 | { |
| 1774 | int escape_char_run = 0; |
| 1775 | char * first; |
| 1776 | char * last; |
| 1777 | |
| 1778 | p = *targ; |
| 1779 | first = p; |
| 1780 | last = p + strlen (p) - 1; |
| 1781 | *parg++ = '"'; |
| 1782 | #if 0 |
| 1783 | /* This version does not escape quotes if they occur at the |
| 1784 | beginning or end of the arg - this could lead to incorrect |
| 1785 | behavior when the arg itself represents a command line |
| 1786 | containing quoted args. I believe this was originally done |
| 1787 | as a hack to make some things work, before |
| 1788 | `w32-quote-process-args' was added. */ |
| 1789 | while (*p) |
| 1790 | { |
| 1791 | if (*p == '"' && p > first && p < last) |
| 1792 | *parg++ = escape_char; /* escape embedded quotes */ |
| 1793 | *parg++ = *p++; |
| 1794 | } |
| 1795 | #else |
| 1796 | for ( ; *p; p++) |
| 1797 | { |
| 1798 | if (*p == '"') |
| 1799 | { |
| 1800 | /* double preceding escape chars if any */ |
| 1801 | while (escape_char_run > 0) |
| 1802 | { |
| 1803 | *parg++ = escape_char; |
| 1804 | escape_char_run--; |
| 1805 | } |
| 1806 | /* escape all quote chars, even at beginning or end */ |
| 1807 | *parg++ = escape_char; |
| 1808 | } |
| 1809 | else if (escape_char == '"' && *p == '\\') |
| 1810 | *parg++ = '\\'; |
| 1811 | *parg++ = *p; |
| 1812 | |
| 1813 | if (*p == escape_char && escape_char != '"') |
| 1814 | escape_char_run++; |
| 1815 | else |
| 1816 | escape_char_run = 0; |
| 1817 | } |
| 1818 | /* double escape chars before enclosing quote */ |
| 1819 | while (escape_char_run > 0) |
| 1820 | { |
| 1821 | *parg++ = escape_char; |
| 1822 | escape_char_run--; |
| 1823 | } |
| 1824 | #endif |
| 1825 | *parg++ = '"'; |
| 1826 | } |
| 1827 | else |
| 1828 | { |
| 1829 | strcpy (parg, *targ); |
| 1830 | parg += strlen (*targ); |
| 1831 | } |
| 1832 | *parg++ = ' '; |
| 1833 | targ++; |
| 1834 | } |
| 1835 | *--parg = '\0'; |
| 1836 | |
| 1837 | /* and envp... */ |
| 1838 | arglen = 1; |
| 1839 | targ = envp; |
| 1840 | numenv = 1; /* for end null */ |
| 1841 | while (*targ) |
| 1842 | { |
| 1843 | arglen += strlen (*targ++) + 1; |
| 1844 | numenv++; |
| 1845 | } |
| 1846 | /* extra env vars... */ |
| 1847 | sprintf (ppid_env_var_buffer, "EM_PARENT_PROCESS_ID=%lu", |
| 1848 | GetCurrentProcessId ()); |
| 1849 | arglen += strlen (ppid_env_var_buffer) + 1; |
| 1850 | numenv++; |
| 1851 | |
| 1852 | /* merge env passed in and extra env into one, and sort it. */ |
| 1853 | targ = (char **) alloca (numenv * sizeof (char *)); |
| 1854 | merge_and_sort_env (envp, extra_env, targ); |
| 1855 | |
| 1856 | /* concatenate env entries. */ |
| 1857 | env = alloca (arglen); |
| 1858 | parg = env; |
| 1859 | while (*targ) |
| 1860 | { |
| 1861 | strcpy (parg, *targ); |
| 1862 | parg += strlen (*targ++); |
| 1863 | *parg++ = '\0'; |
| 1864 | } |
| 1865 | *parg++ = '\0'; |
| 1866 | *parg = '\0'; |
| 1867 | |
| 1868 | cp = new_child (); |
| 1869 | if (cp == NULL) |
| 1870 | { |
| 1871 | errno = EAGAIN; |
| 1872 | return -1; |
| 1873 | } |
| 1874 | |
| 1875 | /* Now create the process. */ |
| 1876 | if (!create_child (cmdname, cmdline, env, is_gui_app, &pid, cp)) |
| 1877 | { |
| 1878 | delete_child (cp); |
| 1879 | errno = ENOEXEC; |
| 1880 | return -1; |
| 1881 | } |
| 1882 | |
| 1883 | return pid; |
| 1884 | } |
| 1885 | |
| 1886 | /* Emulate the select call |
| 1887 | Wait for available input on any of the given rfds, or timeout if |
| 1888 | a timeout is given and no input is detected |
| 1889 | wfds and efds are not supported and must be NULL. |
| 1890 | |
| 1891 | For simplicity, we detect the death of child processes here and |
| 1892 | synchronously call the SIGCHLD handler. Since it is possible for |
| 1893 | children to be created without a corresponding pipe handle from which |
| 1894 | to read output, we wait separately on the process handles as well as |
| 1895 | the char_avail events for each process pipe. We only call |
| 1896 | wait/reap_process when the process actually terminates. |
| 1897 | |
| 1898 | To reduce the number of places in which Emacs can be hung such that |
| 1899 | C-g is not able to interrupt it, we always wait on interrupt_handle |
| 1900 | (which is signaled by the input thread when C-g is detected). If we |
| 1901 | detect that we were woken up by C-g, we return -1 with errno set to |
| 1902 | EINTR as on Unix. */ |
| 1903 | |
| 1904 | /* From w32console.c */ |
| 1905 | extern HANDLE keyboard_handle; |
| 1906 | |
| 1907 | /* From w32xfns.c */ |
| 1908 | extern HANDLE interrupt_handle; |
| 1909 | |
| 1910 | /* From process.c */ |
| 1911 | extern int proc_buffered_char[]; |
| 1912 | |
| 1913 | int |
| 1914 | sys_select (int nfds, SELECT_TYPE *rfds, SELECT_TYPE *wfds, SELECT_TYPE *efds, |
| 1915 | struct timespec *timeout, void *ignored) |
| 1916 | { |
| 1917 | SELECT_TYPE orfds; |
| 1918 | DWORD timeout_ms, start_time; |
| 1919 | int i, nh, nc, nr; |
| 1920 | DWORD active; |
| 1921 | child_process *cp, *cps[MAX_CHILDREN]; |
| 1922 | HANDLE wait_hnd[MAXDESC + MAX_CHILDREN]; |
| 1923 | int fdindex[MAXDESC]; /* mapping from wait handles back to descriptors */ |
| 1924 | |
| 1925 | timeout_ms = |
| 1926 | timeout ? (timeout->tv_sec * 1000 + timeout->tv_nsec / 1000000) : INFINITE; |
| 1927 | |
| 1928 | /* If the descriptor sets are NULL but timeout isn't, then just Sleep. */ |
| 1929 | if (rfds == NULL && wfds == NULL && efds == NULL && timeout != NULL) |
| 1930 | { |
| 1931 | Sleep (timeout_ms); |
| 1932 | return 0; |
| 1933 | } |
| 1934 | |
| 1935 | /* Otherwise, we only handle rfds, so fail otherwise. */ |
| 1936 | if (rfds == NULL || wfds != NULL || efds != NULL) |
| 1937 | { |
| 1938 | errno = EINVAL; |
| 1939 | return -1; |
| 1940 | } |
| 1941 | |
| 1942 | orfds = *rfds; |
| 1943 | FD_ZERO (rfds); |
| 1944 | nr = 0; |
| 1945 | |
| 1946 | /* If interrupt_handle is available and valid, always wait on it, to |
| 1947 | detect C-g (quit). */ |
| 1948 | nh = 0; |
| 1949 | if (interrupt_handle && interrupt_handle != INVALID_HANDLE_VALUE) |
| 1950 | { |
| 1951 | wait_hnd[0] = interrupt_handle; |
| 1952 | fdindex[0] = -1; |
| 1953 | nh++; |
| 1954 | } |
| 1955 | |
| 1956 | /* Build a list of pipe handles to wait on. */ |
| 1957 | for (i = 0; i < nfds; i++) |
| 1958 | if (FD_ISSET (i, &orfds)) |
| 1959 | { |
| 1960 | if (i == 0) |
| 1961 | { |
| 1962 | if (keyboard_handle) |
| 1963 | { |
| 1964 | /* Handle stdin specially */ |
| 1965 | wait_hnd[nh] = keyboard_handle; |
| 1966 | fdindex[nh] = i; |
| 1967 | nh++; |
| 1968 | } |
| 1969 | |
| 1970 | /* Check for any emacs-generated input in the queue since |
| 1971 | it won't be detected in the wait */ |
| 1972 | if (detect_input_pending ()) |
| 1973 | { |
| 1974 | FD_SET (i, rfds); |
| 1975 | return 1; |
| 1976 | } |
| 1977 | else if (noninteractive) |
| 1978 | { |
| 1979 | if (handle_file_notifications (NULL)) |
| 1980 | return 1; |
| 1981 | } |
| 1982 | } |
| 1983 | else |
| 1984 | { |
| 1985 | /* Child process and socket/comm port input. */ |
| 1986 | cp = fd_info[i].cp; |
| 1987 | if (cp) |
| 1988 | { |
| 1989 | int current_status = cp->status; |
| 1990 | |
| 1991 | if (current_status == STATUS_READ_ACKNOWLEDGED) |
| 1992 | { |
| 1993 | /* Tell reader thread which file handle to use. */ |
| 1994 | cp->fd = i; |
| 1995 | /* Wake up the reader thread for this process */ |
| 1996 | cp->status = STATUS_READ_READY; |
| 1997 | if (!SetEvent (cp->char_consumed)) |
| 1998 | DebPrint (("sys_select.SetEvent failed with " |
| 1999 | "%lu for fd %ld\n", GetLastError (), i)); |
| 2000 | } |
| 2001 | |
| 2002 | #ifdef CHECK_INTERLOCK |
| 2003 | /* slightly crude cross-checking of interlock between threads */ |
| 2004 | |
| 2005 | current_status = cp->status; |
| 2006 | if (WaitForSingleObject (cp->char_avail, 0) == WAIT_OBJECT_0) |
| 2007 | { |
| 2008 | /* char_avail has been signaled, so status (which may |
| 2009 | have changed) should indicate read has completed |
| 2010 | but has not been acknowledged. */ |
| 2011 | current_status = cp->status; |
| 2012 | if (current_status != STATUS_READ_SUCCEEDED |
| 2013 | && current_status != STATUS_READ_FAILED) |
| 2014 | DebPrint (("char_avail set, but read not completed: status %d\n", |
| 2015 | current_status)); |
| 2016 | } |
| 2017 | else |
| 2018 | { |
| 2019 | /* char_avail has not been signaled, so status should |
| 2020 | indicate that read is in progress; small possibility |
| 2021 | that read has completed but event wasn't yet signaled |
| 2022 | when we tested it (because a context switch occurred |
| 2023 | or if running on separate CPUs). */ |
| 2024 | if (current_status != STATUS_READ_READY |
| 2025 | && current_status != STATUS_READ_IN_PROGRESS |
| 2026 | && current_status != STATUS_READ_SUCCEEDED |
| 2027 | && current_status != STATUS_READ_FAILED) |
| 2028 | DebPrint (("char_avail reset, but read status is bad: %d\n", |
| 2029 | current_status)); |
| 2030 | } |
| 2031 | #endif |
| 2032 | wait_hnd[nh] = cp->char_avail; |
| 2033 | fdindex[nh] = i; |
| 2034 | if (!wait_hnd[nh]) emacs_abort (); |
| 2035 | nh++; |
| 2036 | #ifdef FULL_DEBUG |
| 2037 | DebPrint (("select waiting on child %d fd %d\n", |
| 2038 | cp-child_procs, i)); |
| 2039 | #endif |
| 2040 | } |
| 2041 | else |
| 2042 | { |
| 2043 | /* Unable to find something to wait on for this fd, skip */ |
| 2044 | |
| 2045 | /* Note that this is not a fatal error, and can in fact |
| 2046 | happen in unusual circumstances. Specifically, if |
| 2047 | sys_spawnve fails, eg. because the program doesn't |
| 2048 | exist, and debug-on-error is t so Fsignal invokes a |
| 2049 | nested input loop, then the process output pipe is |
| 2050 | still included in input_wait_mask with no child_proc |
| 2051 | associated with it. (It is removed when the debugger |
| 2052 | exits the nested input loop and the error is thrown.) */ |
| 2053 | |
| 2054 | DebPrint (("sys_select: fd %ld is invalid! ignoring\n", i)); |
| 2055 | } |
| 2056 | } |
| 2057 | } |
| 2058 | |
| 2059 | count_children: |
| 2060 | /* Add handles of child processes. */ |
| 2061 | nc = 0; |
| 2062 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
| 2063 | /* Some child_procs might be sockets; ignore them. Also some |
| 2064 | children may have died already, but we haven't finished reading |
| 2065 | the process output; ignore them too. */ |
| 2066 | if ((CHILD_ACTIVE (cp) && cp->procinfo.hProcess) |
| 2067 | && (cp->fd < 0 |
| 2068 | || (fd_info[cp->fd].flags & FILE_SEND_SIGCHLD) == 0 |
| 2069 | || (fd_info[cp->fd].flags & FILE_AT_EOF) != 0) |
| 2070 | ) |
| 2071 | { |
| 2072 | wait_hnd[nh + nc] = cp->procinfo.hProcess; |
| 2073 | cps[nc] = cp; |
| 2074 | nc++; |
| 2075 | } |
| 2076 | |
| 2077 | /* Nothing to look for, so we didn't find anything */ |
| 2078 | if (nh + nc == 0) |
| 2079 | { |
| 2080 | if (timeout) |
| 2081 | Sleep (timeout_ms); |
| 2082 | if (noninteractive) |
| 2083 | { |
| 2084 | if (handle_file_notifications (NULL)) |
| 2085 | return 1; |
| 2086 | } |
| 2087 | return 0; |
| 2088 | } |
| 2089 | |
| 2090 | start_time = GetTickCount (); |
| 2091 | |
| 2092 | /* Wait for input or child death to be signaled. If user input is |
| 2093 | allowed, then also accept window messages. */ |
| 2094 | if (FD_ISSET (0, &orfds)) |
| 2095 | active = MsgWaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms, |
| 2096 | QS_ALLINPUT); |
| 2097 | else |
| 2098 | active = WaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms); |
| 2099 | |
| 2100 | if (active == WAIT_FAILED) |
| 2101 | { |
| 2102 | DebPrint (("select.WaitForMultipleObjects (%d, %lu) failed with %lu\n", |
| 2103 | nh + nc, timeout_ms, GetLastError ())); |
| 2104 | /* don't return EBADF - this causes wait_reading_process_output to |
| 2105 | abort; WAIT_FAILED is returned when single-stepping under |
| 2106 | Windows 95 after switching thread focus in debugger, and |
| 2107 | possibly at other times. */ |
| 2108 | errno = EINTR; |
| 2109 | return -1; |
| 2110 | } |
| 2111 | else if (active == WAIT_TIMEOUT) |
| 2112 | { |
| 2113 | if (noninteractive) |
| 2114 | { |
| 2115 | if (handle_file_notifications (NULL)) |
| 2116 | return 1; |
| 2117 | } |
| 2118 | return 0; |
| 2119 | } |
| 2120 | else if (active >= WAIT_OBJECT_0 |
| 2121 | && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) |
| 2122 | { |
| 2123 | active -= WAIT_OBJECT_0; |
| 2124 | } |
| 2125 | else if (active >= WAIT_ABANDONED_0 |
| 2126 | && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) |
| 2127 | { |
| 2128 | active -= WAIT_ABANDONED_0; |
| 2129 | } |
| 2130 | else |
| 2131 | emacs_abort (); |
| 2132 | |
| 2133 | /* Loop over all handles after active (now officially documented as |
| 2134 | being the first signaled handle in the array). We do this to |
| 2135 | ensure fairness, so that all channels with data available will be |
| 2136 | processed - otherwise higher numbered channels could be starved. */ |
| 2137 | do |
| 2138 | { |
| 2139 | if (active == nh + nc) |
| 2140 | { |
| 2141 | /* There are messages in the lisp thread's queue; we must |
| 2142 | drain the queue now to ensure they are processed promptly, |
| 2143 | because if we don't do so, we will not be woken again until |
| 2144 | further messages arrive. |
| 2145 | |
| 2146 | NB. If ever we allow window message procedures to callback |
| 2147 | into lisp, we will need to ensure messages are dispatched |
| 2148 | at a safe time for lisp code to be run (*), and we may also |
| 2149 | want to provide some hooks in the dispatch loop to cater |
| 2150 | for modeless dialogs created by lisp (ie. to register |
| 2151 | window handles to pass to IsDialogMessage). |
| 2152 | |
| 2153 | (*) Note that MsgWaitForMultipleObjects above is an |
| 2154 | internal dispatch point for messages that are sent to |
| 2155 | windows created by this thread. */ |
| 2156 | if (drain_message_queue () |
| 2157 | /* If drain_message_queue returns non-zero, that means |
| 2158 | we received a WM_EMACS_FILENOTIFY message. If this |
| 2159 | is a TTY frame, we must signal the caller that keyboard |
| 2160 | input is available, so that w32_console_read_socket |
| 2161 | will be called to pick up the notifications. If we |
| 2162 | don't do that, file notifications will only work when |
| 2163 | the Emacs TTY frame has focus. */ |
| 2164 | && FRAME_TERMCAP_P (SELECTED_FRAME ()) |
| 2165 | /* they asked for stdin reads */ |
| 2166 | && FD_ISSET (0, &orfds) |
| 2167 | /* the stdin handle is valid */ |
| 2168 | && keyboard_handle) |
| 2169 | { |
| 2170 | FD_SET (0, rfds); |
| 2171 | if (nr == 0) |
| 2172 | nr = 1; |
| 2173 | } |
| 2174 | } |
| 2175 | else if (active >= nh) |
| 2176 | { |
| 2177 | cp = cps[active - nh]; |
| 2178 | |
| 2179 | /* We cannot always signal SIGCHLD immediately; if we have not |
| 2180 | finished reading the process output, we must delay sending |
| 2181 | SIGCHLD until we do. */ |
| 2182 | |
| 2183 | if (cp->fd >= 0 && (fd_info[cp->fd].flags & FILE_AT_EOF) == 0) |
| 2184 | fd_info[cp->fd].flags |= FILE_SEND_SIGCHLD; |
| 2185 | /* SIG_DFL for SIGCHLD is ignore */ |
| 2186 | else if (sig_handlers[SIGCHLD] != SIG_DFL && |
| 2187 | sig_handlers[SIGCHLD] != SIG_IGN) |
| 2188 | { |
| 2189 | #ifdef FULL_DEBUG |
| 2190 | DebPrint (("select calling SIGCHLD handler for pid %d\n", |
| 2191 | cp->pid)); |
| 2192 | #endif |
| 2193 | sig_handlers[SIGCHLD] (SIGCHLD); |
| 2194 | } |
| 2195 | } |
| 2196 | else if (fdindex[active] == -1) |
| 2197 | { |
| 2198 | /* Quit (C-g) was detected. */ |
| 2199 | errno = EINTR; |
| 2200 | return -1; |
| 2201 | } |
| 2202 | else if (fdindex[active] == 0) |
| 2203 | { |
| 2204 | /* Keyboard input available */ |
| 2205 | FD_SET (0, rfds); |
| 2206 | nr++; |
| 2207 | } |
| 2208 | else |
| 2209 | { |
| 2210 | /* must be a socket or pipe - read ahead should have |
| 2211 | completed, either succeeding or failing. */ |
| 2212 | FD_SET (fdindex[active], rfds); |
| 2213 | nr++; |
| 2214 | } |
| 2215 | |
| 2216 | /* Even though wait_reading_process_output only reads from at most |
| 2217 | one channel, we must process all channels here so that we reap |
| 2218 | all children that have died. */ |
| 2219 | while (++active < nh + nc) |
| 2220 | if (WaitForSingleObject (wait_hnd[active], 0) == WAIT_OBJECT_0) |
| 2221 | break; |
| 2222 | } while (active < nh + nc); |
| 2223 | |
| 2224 | if (noninteractive) |
| 2225 | { |
| 2226 | if (handle_file_notifications (NULL)) |
| 2227 | nr++; |
| 2228 | } |
| 2229 | |
| 2230 | /* If no input has arrived and timeout hasn't expired, wait again. */ |
| 2231 | if (nr == 0) |
| 2232 | { |
| 2233 | DWORD elapsed = GetTickCount () - start_time; |
| 2234 | |
| 2235 | if (timeout_ms > elapsed) /* INFINITE is MAX_UINT */ |
| 2236 | { |
| 2237 | if (timeout_ms != INFINITE) |
| 2238 | timeout_ms -= elapsed; |
| 2239 | goto count_children; |
| 2240 | } |
| 2241 | } |
| 2242 | |
| 2243 | return nr; |
| 2244 | } |
| 2245 | |
| 2246 | /* Substitute for certain kill () operations */ |
| 2247 | |
| 2248 | static BOOL CALLBACK |
| 2249 | find_child_console (HWND hwnd, LPARAM arg) |
| 2250 | { |
| 2251 | child_process * cp = (child_process *) arg; |
| 2252 | DWORD thread_id; |
| 2253 | DWORD process_id; |
| 2254 | |
| 2255 | thread_id = GetWindowThreadProcessId (hwnd, &process_id); |
| 2256 | if (process_id == cp->procinfo.dwProcessId) |
| 2257 | { |
| 2258 | char window_class[32]; |
| 2259 | |
| 2260 | GetClassName (hwnd, window_class, sizeof (window_class)); |
| 2261 | if (strcmp (window_class, |
| 2262 | (os_subtype == OS_9X) |
| 2263 | ? "tty" |
| 2264 | : "ConsoleWindowClass") == 0) |
| 2265 | { |
| 2266 | cp->hwnd = hwnd; |
| 2267 | return FALSE; |
| 2268 | } |
| 2269 | } |
| 2270 | /* keep looking */ |
| 2271 | return TRUE; |
| 2272 | } |
| 2273 | |
| 2274 | /* Emulate 'kill', but only for other processes. */ |
| 2275 | int |
| 2276 | sys_kill (pid_t pid, int sig) |
| 2277 | { |
| 2278 | child_process *cp; |
| 2279 | HANDLE proc_hand; |
| 2280 | int need_to_free = 0; |
| 2281 | int rc = 0; |
| 2282 | |
| 2283 | /* Each process is in its own process group. */ |
| 2284 | if (pid < 0) |
| 2285 | pid = -pid; |
| 2286 | |
| 2287 | /* Only handle signals that will result in the process dying */ |
| 2288 | if (sig != 0 |
| 2289 | && sig != SIGINT && sig != SIGKILL && sig != SIGQUIT && sig != SIGHUP) |
| 2290 | { |
| 2291 | errno = EINVAL; |
| 2292 | return -1; |
| 2293 | } |
| 2294 | |
| 2295 | if (sig == 0) |
| 2296 | { |
| 2297 | /* It will take _some_ time before PID 4 or less on Windows will |
| 2298 | be Emacs... */ |
| 2299 | if (pid <= 4) |
| 2300 | { |
| 2301 | errno = EPERM; |
| 2302 | return -1; |
| 2303 | } |
| 2304 | proc_hand = OpenProcess (PROCESS_QUERY_INFORMATION, 0, pid); |
| 2305 | if (proc_hand == NULL) |
| 2306 | { |
| 2307 | DWORD err = GetLastError (); |
| 2308 | |
| 2309 | switch (err) |
| 2310 | { |
| 2311 | case ERROR_ACCESS_DENIED: /* existing process, but access denied */ |
| 2312 | errno = EPERM; |
| 2313 | return -1; |
| 2314 | case ERROR_INVALID_PARAMETER: /* process PID does not exist */ |
| 2315 | errno = ESRCH; |
| 2316 | return -1; |
| 2317 | } |
| 2318 | } |
| 2319 | else |
| 2320 | CloseHandle (proc_hand); |
| 2321 | return 0; |
| 2322 | } |
| 2323 | |
| 2324 | cp = find_child_pid (pid); |
| 2325 | if (cp == NULL) |
| 2326 | { |
| 2327 | /* We were passed a PID of something other than our subprocess. |
| 2328 | If that is our own PID, we will send to ourself a message to |
| 2329 | close the selected frame, which does not necessarily |
| 2330 | terminates Emacs. But then we are not supposed to call |
| 2331 | sys_kill with our own PID. */ |
| 2332 | proc_hand = OpenProcess (PROCESS_TERMINATE, 0, pid); |
| 2333 | if (proc_hand == NULL) |
| 2334 | { |
| 2335 | errno = EPERM; |
| 2336 | return -1; |
| 2337 | } |
| 2338 | need_to_free = 1; |
| 2339 | } |
| 2340 | else |
| 2341 | { |
| 2342 | proc_hand = cp->procinfo.hProcess; |
| 2343 | pid = cp->procinfo.dwProcessId; |
| 2344 | |
| 2345 | /* Try to locate console window for process. */ |
| 2346 | EnumWindows (find_child_console, (LPARAM) cp); |
| 2347 | } |
| 2348 | |
| 2349 | if (sig == SIGINT || sig == SIGQUIT) |
| 2350 | { |
| 2351 | if (NILP (Vw32_start_process_share_console) && cp && cp->hwnd) |
| 2352 | { |
| 2353 | BYTE control_scan_code = (BYTE) MapVirtualKey (VK_CONTROL, 0); |
| 2354 | /* Fake Ctrl-C for SIGINT, and Ctrl-Break for SIGQUIT. */ |
| 2355 | BYTE vk_break_code = (sig == SIGINT) ? 'C' : VK_CANCEL; |
| 2356 | BYTE break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0); |
| 2357 | HWND foreground_window; |
| 2358 | |
| 2359 | if (break_scan_code == 0) |
| 2360 | { |
| 2361 | /* Fake Ctrl-C for SIGQUIT if we can't manage Ctrl-Break. */ |
| 2362 | vk_break_code = 'C'; |
| 2363 | break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0); |
| 2364 | } |
| 2365 | |
| 2366 | foreground_window = GetForegroundWindow (); |
| 2367 | if (foreground_window) |
| 2368 | { |
| 2369 | /* NT 5.0, and apparently also Windows 98, will not allow |
| 2370 | a Window to be set to foreground directly without the |
| 2371 | user's involvement. The workaround is to attach |
| 2372 | ourselves to the thread that owns the foreground |
| 2373 | window, since that is the only thread that can set the |
| 2374 | foreground window. */ |
| 2375 | DWORD foreground_thread, child_thread; |
| 2376 | foreground_thread = |
| 2377 | GetWindowThreadProcessId (foreground_window, NULL); |
| 2378 | if (foreground_thread == GetCurrentThreadId () |
| 2379 | || !AttachThreadInput (GetCurrentThreadId (), |
| 2380 | foreground_thread, TRUE)) |
| 2381 | foreground_thread = 0; |
| 2382 | |
| 2383 | child_thread = GetWindowThreadProcessId (cp->hwnd, NULL); |
| 2384 | if (child_thread == GetCurrentThreadId () |
| 2385 | || !AttachThreadInput (GetCurrentThreadId (), |
| 2386 | child_thread, TRUE)) |
| 2387 | child_thread = 0; |
| 2388 | |
| 2389 | /* Set the foreground window to the child. */ |
| 2390 | if (SetForegroundWindow (cp->hwnd)) |
| 2391 | { |
| 2392 | /* Generate keystrokes as if user had typed Ctrl-Break or |
| 2393 | Ctrl-C. */ |
| 2394 | keybd_event (VK_CONTROL, control_scan_code, 0, 0); |
| 2395 | keybd_event (vk_break_code, break_scan_code, |
| 2396 | (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY), 0); |
| 2397 | keybd_event (vk_break_code, break_scan_code, |
| 2398 | (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY) |
| 2399 | | KEYEVENTF_KEYUP, 0); |
| 2400 | keybd_event (VK_CONTROL, control_scan_code, |
| 2401 | KEYEVENTF_KEYUP, 0); |
| 2402 | |
| 2403 | /* Sleep for a bit to give time for Emacs frame to respond |
| 2404 | to focus change events (if Emacs was active app). */ |
| 2405 | Sleep (100); |
| 2406 | |
| 2407 | SetForegroundWindow (foreground_window); |
| 2408 | } |
| 2409 | /* Detach from the foreground and child threads now that |
| 2410 | the foreground switching is over. */ |
| 2411 | if (foreground_thread) |
| 2412 | AttachThreadInput (GetCurrentThreadId (), |
| 2413 | foreground_thread, FALSE); |
| 2414 | if (child_thread) |
| 2415 | AttachThreadInput (GetCurrentThreadId (), |
| 2416 | child_thread, FALSE); |
| 2417 | } |
| 2418 | } |
| 2419 | /* Ctrl-Break is NT equivalent of SIGINT. */ |
| 2420 | else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid)) |
| 2421 | { |
| 2422 | DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d " |
| 2423 | "for pid %lu\n", GetLastError (), pid)); |
| 2424 | errno = EINVAL; |
| 2425 | rc = -1; |
| 2426 | } |
| 2427 | } |
| 2428 | else |
| 2429 | { |
| 2430 | if (NILP (Vw32_start_process_share_console) && cp && cp->hwnd) |
| 2431 | { |
| 2432 | #if 1 |
| 2433 | if (os_subtype == OS_9X) |
| 2434 | { |
| 2435 | /* |
| 2436 | Another possibility is to try terminating the VDM out-right by |
| 2437 | calling the Shell VxD (id 0x17) V86 interface, function #4 |
| 2438 | "SHELL_Destroy_VM", ie. |
| 2439 | |
| 2440 | mov edx,4 |
| 2441 | mov ebx,vm_handle |
| 2442 | call shellapi |
| 2443 | |
| 2444 | First need to determine the current VM handle, and then arrange for |
| 2445 | the shellapi call to be made from the system vm (by using |
| 2446 | Switch_VM_and_callback). |
| 2447 | |
| 2448 | Could try to invoke DestroyVM through CallVxD. |
| 2449 | |
| 2450 | */ |
| 2451 | #if 0 |
| 2452 | /* On Windows 95, posting WM_QUIT causes the 16-bit subsystem |
| 2453 | to hang when cmdproxy is used in conjunction with |
| 2454 | command.com for an interactive shell. Posting |
| 2455 | WM_CLOSE pops up a dialog that, when Yes is selected, |
| 2456 | does the same thing. TerminateProcess is also less |
| 2457 | than ideal in that subprocesses tend to stick around |
| 2458 | until the machine is shutdown, but at least it |
| 2459 | doesn't freeze the 16-bit subsystem. */ |
| 2460 | PostMessage (cp->hwnd, WM_QUIT, 0xff, 0); |
| 2461 | #endif |
| 2462 | if (!TerminateProcess (proc_hand, 0xff)) |
| 2463 | { |
| 2464 | DebPrint (("sys_kill.TerminateProcess returned %d " |
| 2465 | "for pid %lu\n", GetLastError (), pid)); |
| 2466 | errno = EINVAL; |
| 2467 | rc = -1; |
| 2468 | } |
| 2469 | } |
| 2470 | else |
| 2471 | #endif |
| 2472 | PostMessage (cp->hwnd, WM_CLOSE, 0, 0); |
| 2473 | } |
| 2474 | /* Kill the process. On W32 this doesn't kill child processes |
| 2475 | so it doesn't work very well for shells which is why it's not |
| 2476 | used in every case. */ |
| 2477 | else if (!TerminateProcess (proc_hand, 0xff)) |
| 2478 | { |
| 2479 | DebPrint (("sys_kill.TerminateProcess returned %d " |
| 2480 | "for pid %lu\n", GetLastError (), pid)); |
| 2481 | errno = EINVAL; |
| 2482 | rc = -1; |
| 2483 | } |
| 2484 | } |
| 2485 | |
| 2486 | if (need_to_free) |
| 2487 | CloseHandle (proc_hand); |
| 2488 | |
| 2489 | return rc; |
| 2490 | } |
| 2491 | |
| 2492 | /* The following two routines are used to manipulate stdin, stdout, and |
| 2493 | stderr of our child processes. |
| 2494 | |
| 2495 | Assuming that in, out, and err are *not* inheritable, we make them |
| 2496 | stdin, stdout, and stderr of the child as follows: |
| 2497 | |
| 2498 | - Save the parent's current standard handles. |
| 2499 | - Set the std handles to inheritable duplicates of the ones being passed in. |
| 2500 | (Note that _get_osfhandle() is an io.h procedure that retrieves the |
| 2501 | NT file handle for a crt file descriptor.) |
| 2502 | - Spawn the child, which inherits in, out, and err as stdin, |
| 2503 | stdout, and stderr. (see Spawnve) |
| 2504 | - Close the std handles passed to the child. |
| 2505 | - Reset the parent's standard handles to the saved handles. |
| 2506 | (see reset_standard_handles) |
| 2507 | We assume that the caller closes in, out, and err after calling us. */ |
| 2508 | |
| 2509 | void |
| 2510 | prepare_standard_handles (int in, int out, int err, HANDLE handles[3]) |
| 2511 | { |
| 2512 | HANDLE parent; |
| 2513 | HANDLE newstdin, newstdout, newstderr; |
| 2514 | |
| 2515 | parent = GetCurrentProcess (); |
| 2516 | |
| 2517 | handles[0] = GetStdHandle (STD_INPUT_HANDLE); |
| 2518 | handles[1] = GetStdHandle (STD_OUTPUT_HANDLE); |
| 2519 | handles[2] = GetStdHandle (STD_ERROR_HANDLE); |
| 2520 | |
| 2521 | /* make inheritable copies of the new handles */ |
| 2522 | if (!DuplicateHandle (parent, |
| 2523 | (HANDLE) _get_osfhandle (in), |
| 2524 | parent, |
| 2525 | &newstdin, |
| 2526 | 0, |
| 2527 | TRUE, |
| 2528 | DUPLICATE_SAME_ACCESS)) |
| 2529 | report_file_error ("Duplicating input handle for child", Qnil); |
| 2530 | |
| 2531 | if (!DuplicateHandle (parent, |
| 2532 | (HANDLE) _get_osfhandle (out), |
| 2533 | parent, |
| 2534 | &newstdout, |
| 2535 | 0, |
| 2536 | TRUE, |
| 2537 | DUPLICATE_SAME_ACCESS)) |
| 2538 | report_file_error ("Duplicating output handle for child", Qnil); |
| 2539 | |
| 2540 | if (!DuplicateHandle (parent, |
| 2541 | (HANDLE) _get_osfhandle (err), |
| 2542 | parent, |
| 2543 | &newstderr, |
| 2544 | 0, |
| 2545 | TRUE, |
| 2546 | DUPLICATE_SAME_ACCESS)) |
| 2547 | report_file_error ("Duplicating error handle for child", Qnil); |
| 2548 | |
| 2549 | /* and store them as our std handles */ |
| 2550 | if (!SetStdHandle (STD_INPUT_HANDLE, newstdin)) |
| 2551 | report_file_error ("Changing stdin handle", Qnil); |
| 2552 | |
| 2553 | if (!SetStdHandle (STD_OUTPUT_HANDLE, newstdout)) |
| 2554 | report_file_error ("Changing stdout handle", Qnil); |
| 2555 | |
| 2556 | if (!SetStdHandle (STD_ERROR_HANDLE, newstderr)) |
| 2557 | report_file_error ("Changing stderr handle", Qnil); |
| 2558 | } |
| 2559 | |
| 2560 | void |
| 2561 | reset_standard_handles (int in, int out, int err, HANDLE handles[3]) |
| 2562 | { |
| 2563 | /* close the duplicated handles passed to the child */ |
| 2564 | CloseHandle (GetStdHandle (STD_INPUT_HANDLE)); |
| 2565 | CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE)); |
| 2566 | CloseHandle (GetStdHandle (STD_ERROR_HANDLE)); |
| 2567 | |
| 2568 | /* now restore parent's saved std handles */ |
| 2569 | SetStdHandle (STD_INPUT_HANDLE, handles[0]); |
| 2570 | SetStdHandle (STD_OUTPUT_HANDLE, handles[1]); |
| 2571 | SetStdHandle (STD_ERROR_HANDLE, handles[2]); |
| 2572 | } |
| 2573 | |
| 2574 | void |
| 2575 | set_process_dir (char * dir) |
| 2576 | { |
| 2577 | process_dir = dir; |
| 2578 | } |
| 2579 | |
| 2580 | /* To avoid problems with winsock implementations that work over dial-up |
| 2581 | connections causing or requiring a connection to exist while Emacs is |
| 2582 | running, Emacs no longer automatically loads winsock on startup if it |
| 2583 | is present. Instead, it will be loaded when open-network-stream is |
| 2584 | first called. |
| 2585 | |
| 2586 | To allow full control over when winsock is loaded, we provide these |
| 2587 | two functions to dynamically load and unload winsock. This allows |
| 2588 | dial-up users to only be connected when they actually need to use |
| 2589 | socket services. */ |
| 2590 | |
| 2591 | /* From w32.c */ |
| 2592 | extern HANDLE winsock_lib; |
| 2593 | extern BOOL term_winsock (void); |
| 2594 | extern BOOL init_winsock (int load_now); |
| 2595 | |
| 2596 | DEFUN ("w32-has-winsock", Fw32_has_winsock, Sw32_has_winsock, 0, 1, 0, |
| 2597 | doc: /* Test for presence of the Windows socket library `winsock'. |
| 2598 | Returns non-nil if winsock support is present, nil otherwise. |
| 2599 | |
| 2600 | If the optional argument LOAD-NOW is non-nil, the winsock library is |
| 2601 | also loaded immediately if not already loaded. If winsock is loaded, |
| 2602 | the winsock local hostname is returned (since this may be different from |
| 2603 | the value of `system-name' and should supplant it), otherwise t is |
| 2604 | returned to indicate winsock support is present. */) |
| 2605 | (Lisp_Object load_now) |
| 2606 | { |
| 2607 | int have_winsock; |
| 2608 | |
| 2609 | have_winsock = init_winsock (!NILP (load_now)); |
| 2610 | if (have_winsock) |
| 2611 | { |
| 2612 | if (winsock_lib != NULL) |
| 2613 | { |
| 2614 | /* Return new value for system-name. The best way to do this |
| 2615 | is to call init_system_name, saving and restoring the |
| 2616 | original value to avoid side-effects. */ |
| 2617 | Lisp_Object orig_hostname = Vsystem_name; |
| 2618 | Lisp_Object hostname; |
| 2619 | |
| 2620 | init_system_name (); |
| 2621 | hostname = Vsystem_name; |
| 2622 | Vsystem_name = orig_hostname; |
| 2623 | return hostname; |
| 2624 | } |
| 2625 | return Qt; |
| 2626 | } |
| 2627 | return Qnil; |
| 2628 | } |
| 2629 | |
| 2630 | DEFUN ("w32-unload-winsock", Fw32_unload_winsock, Sw32_unload_winsock, |
| 2631 | 0, 0, 0, |
| 2632 | doc: /* Unload the Windows socket library `winsock' if loaded. |
| 2633 | This is provided to allow dial-up socket connections to be disconnected |
| 2634 | when no longer needed. Returns nil without unloading winsock if any |
| 2635 | socket connections still exist. */) |
| 2636 | (void) |
| 2637 | { |
| 2638 | return term_winsock () ? Qt : Qnil; |
| 2639 | } |
| 2640 | |
| 2641 | \f |
| 2642 | /* Some miscellaneous functions that are Windows specific, but not GUI |
| 2643 | specific (ie. are applicable in terminal or batch mode as well). */ |
| 2644 | |
| 2645 | DEFUN ("w32-short-file-name", Fw32_short_file_name, Sw32_short_file_name, 1, 1, 0, |
| 2646 | doc: /* Return the short file name version (8.3) of the full path of FILENAME. |
| 2647 | If FILENAME does not exist, return nil. |
| 2648 | All path elements in FILENAME are converted to their short names. */) |
| 2649 | (Lisp_Object filename) |
| 2650 | { |
| 2651 | char shortname[MAX_PATH]; |
| 2652 | |
| 2653 | CHECK_STRING (filename); |
| 2654 | |
| 2655 | /* first expand it. */ |
| 2656 | filename = Fexpand_file_name (filename, Qnil); |
| 2657 | |
| 2658 | /* luckily, this returns the short version of each element in the path. */ |
| 2659 | if (w32_get_short_filename (SDATA (ENCODE_FILE (filename)), |
| 2660 | shortname, MAX_PATH) == 0) |
| 2661 | return Qnil; |
| 2662 | |
| 2663 | dostounix_filename (shortname); |
| 2664 | |
| 2665 | /* No need to DECODE_FILE, because 8.3 names are pure ASCII. */ |
| 2666 | return build_string (shortname); |
| 2667 | } |
| 2668 | |
| 2669 | |
| 2670 | DEFUN ("w32-long-file-name", Fw32_long_file_name, Sw32_long_file_name, |
| 2671 | 1, 1, 0, |
| 2672 | doc: /* Return the long file name version of the full path of FILENAME. |
| 2673 | If FILENAME does not exist, return nil. |
| 2674 | All path elements in FILENAME are converted to their long names. */) |
| 2675 | (Lisp_Object filename) |
| 2676 | { |
| 2677 | char longname[ MAX_UTF8_PATH ]; |
| 2678 | int drive_only = 0; |
| 2679 | |
| 2680 | CHECK_STRING (filename); |
| 2681 | |
| 2682 | if (SBYTES (filename) == 2 |
| 2683 | && *(SDATA (filename) + 1) == ':') |
| 2684 | drive_only = 1; |
| 2685 | |
| 2686 | /* first expand it. */ |
| 2687 | filename = Fexpand_file_name (filename, Qnil); |
| 2688 | |
| 2689 | if (!w32_get_long_filename (SDATA (ENCODE_FILE (filename)), longname, |
| 2690 | MAX_UTF8_PATH)) |
| 2691 | return Qnil; |
| 2692 | |
| 2693 | dostounix_filename (longname); |
| 2694 | |
| 2695 | /* If we were passed only a drive, make sure that a slash is not appended |
| 2696 | for consistency with directories. Allow for drive mapping via SUBST |
| 2697 | in case expand-file-name is ever changed to expand those. */ |
| 2698 | if (drive_only && longname[1] == ':' && longname[2] == '/' && !longname[3]) |
| 2699 | longname[2] = '\0'; |
| 2700 | |
| 2701 | return DECODE_FILE (build_unibyte_string (longname)); |
| 2702 | } |
| 2703 | |
| 2704 | DEFUN ("w32-set-process-priority", Fw32_set_process_priority, |
| 2705 | Sw32_set_process_priority, 2, 2, 0, |
| 2706 | doc: /* Set the priority of PROCESS to PRIORITY. |
| 2707 | If PROCESS is nil, the priority of Emacs is changed, otherwise the |
| 2708 | priority of the process whose pid is PROCESS is changed. |
| 2709 | PRIORITY should be one of the symbols high, normal, or low; |
| 2710 | any other symbol will be interpreted as normal. |
| 2711 | |
| 2712 | If successful, the return value is t, otherwise nil. */) |
| 2713 | (Lisp_Object process, Lisp_Object priority) |
| 2714 | { |
| 2715 | HANDLE proc_handle = GetCurrentProcess (); |
| 2716 | DWORD priority_class = NORMAL_PRIORITY_CLASS; |
| 2717 | Lisp_Object result = Qnil; |
| 2718 | |
| 2719 | CHECK_SYMBOL (priority); |
| 2720 | |
| 2721 | if (!NILP (process)) |
| 2722 | { |
| 2723 | DWORD pid; |
| 2724 | child_process *cp; |
| 2725 | |
| 2726 | CHECK_NUMBER (process); |
| 2727 | |
| 2728 | /* Allow pid to be an internally generated one, or one obtained |
| 2729 | externally. This is necessary because real pids on Windows 95 are |
| 2730 | negative. */ |
| 2731 | |
| 2732 | pid = XINT (process); |
| 2733 | cp = find_child_pid (pid); |
| 2734 | if (cp != NULL) |
| 2735 | pid = cp->procinfo.dwProcessId; |
| 2736 | |
| 2737 | proc_handle = OpenProcess (PROCESS_SET_INFORMATION, FALSE, pid); |
| 2738 | } |
| 2739 | |
| 2740 | if (EQ (priority, Qhigh)) |
| 2741 | priority_class = HIGH_PRIORITY_CLASS; |
| 2742 | else if (EQ (priority, Qlow)) |
| 2743 | priority_class = IDLE_PRIORITY_CLASS; |
| 2744 | |
| 2745 | if (proc_handle != NULL) |
| 2746 | { |
| 2747 | if (SetPriorityClass (proc_handle, priority_class)) |
| 2748 | result = Qt; |
| 2749 | if (!NILP (process)) |
| 2750 | CloseHandle (proc_handle); |
| 2751 | } |
| 2752 | |
| 2753 | return result; |
| 2754 | } |
| 2755 | |
| 2756 | #ifdef HAVE_LANGINFO_CODESET |
| 2757 | /* Emulation of nl_langinfo. Used in fns.c:Flocale_info. */ |
| 2758 | char * |
| 2759 | nl_langinfo (nl_item item) |
| 2760 | { |
| 2761 | /* Conversion of Posix item numbers to their Windows equivalents. */ |
| 2762 | static const LCTYPE w32item[] = { |
| 2763 | LOCALE_IDEFAULTANSICODEPAGE, |
| 2764 | LOCALE_SDAYNAME1, LOCALE_SDAYNAME2, LOCALE_SDAYNAME3, |
| 2765 | LOCALE_SDAYNAME4, LOCALE_SDAYNAME5, LOCALE_SDAYNAME6, LOCALE_SDAYNAME7, |
| 2766 | LOCALE_SMONTHNAME1, LOCALE_SMONTHNAME2, LOCALE_SMONTHNAME3, |
| 2767 | LOCALE_SMONTHNAME4, LOCALE_SMONTHNAME5, LOCALE_SMONTHNAME6, |
| 2768 | LOCALE_SMONTHNAME7, LOCALE_SMONTHNAME8, LOCALE_SMONTHNAME9, |
| 2769 | LOCALE_SMONTHNAME10, LOCALE_SMONTHNAME11, LOCALE_SMONTHNAME12 |
| 2770 | }; |
| 2771 | |
| 2772 | static char *nl_langinfo_buf = NULL; |
| 2773 | static int nl_langinfo_len = 0; |
| 2774 | |
| 2775 | if (nl_langinfo_len <= 0) |
| 2776 | nl_langinfo_buf = xmalloc (nl_langinfo_len = 1); |
| 2777 | |
| 2778 | if (item < 0 || item >= _NL_NUM) |
| 2779 | nl_langinfo_buf[0] = 0; |
| 2780 | else |
| 2781 | { |
| 2782 | LCID cloc = GetThreadLocale (); |
| 2783 | int need_len = GetLocaleInfo (cloc, w32item[item] | LOCALE_USE_CP_ACP, |
| 2784 | NULL, 0); |
| 2785 | |
| 2786 | if (need_len <= 0) |
| 2787 | nl_langinfo_buf[0] = 0; |
| 2788 | else |
| 2789 | { |
| 2790 | if (item == CODESET) |
| 2791 | { |
| 2792 | need_len += 2; /* for the "cp" prefix */ |
| 2793 | if (need_len < 8) /* for the case we call GetACP */ |
| 2794 | need_len = 8; |
| 2795 | } |
| 2796 | if (nl_langinfo_len <= need_len) |
| 2797 | nl_langinfo_buf = xrealloc (nl_langinfo_buf, |
| 2798 | nl_langinfo_len = need_len); |
| 2799 | if (!GetLocaleInfo (cloc, w32item[item] | LOCALE_USE_CP_ACP, |
| 2800 | nl_langinfo_buf, nl_langinfo_len)) |
| 2801 | nl_langinfo_buf[0] = 0; |
| 2802 | else if (item == CODESET) |
| 2803 | { |
| 2804 | if (strcmp (nl_langinfo_buf, "0") == 0 /* CP_ACP */ |
| 2805 | || strcmp (nl_langinfo_buf, "1") == 0) /* CP_OEMCP */ |
| 2806 | sprintf (nl_langinfo_buf, "cp%u", GetACP ()); |
| 2807 | else |
| 2808 | { |
| 2809 | memmove (nl_langinfo_buf + 2, nl_langinfo_buf, |
| 2810 | strlen (nl_langinfo_buf) + 1); |
| 2811 | nl_langinfo_buf[0] = 'c'; |
| 2812 | nl_langinfo_buf[1] = 'p'; |
| 2813 | } |
| 2814 | } |
| 2815 | } |
| 2816 | } |
| 2817 | return nl_langinfo_buf; |
| 2818 | } |
| 2819 | #endif /* HAVE_LANGINFO_CODESET */ |
| 2820 | |
| 2821 | DEFUN ("w32-get-locale-info", Fw32_get_locale_info, |
| 2822 | Sw32_get_locale_info, 1, 2, 0, |
| 2823 | doc: /* Return information about the Windows locale LCID. |
| 2824 | By default, return a three letter locale code which encodes the default |
| 2825 | language as the first two characters, and the country or regional variant |
| 2826 | as the third letter. For example, ENU refers to `English (United States)', |
| 2827 | while ENC means `English (Canadian)'. |
| 2828 | |
| 2829 | If the optional argument LONGFORM is t, the long form of the locale |
| 2830 | name is returned, e.g. `English (United States)' instead; if LONGFORM |
| 2831 | is a number, it is interpreted as an LCTYPE constant and the corresponding |
| 2832 | locale information is returned. |
| 2833 | |
| 2834 | If LCID (a 16-bit number) is not a valid locale, the result is nil. */) |
| 2835 | (Lisp_Object lcid, Lisp_Object longform) |
| 2836 | { |
| 2837 | int got_abbrev; |
| 2838 | int got_full; |
| 2839 | char abbrev_name[32] = { 0 }; |
| 2840 | char full_name[256] = { 0 }; |
| 2841 | |
| 2842 | CHECK_NUMBER (lcid); |
| 2843 | |
| 2844 | if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED)) |
| 2845 | return Qnil; |
| 2846 | |
| 2847 | if (NILP (longform)) |
| 2848 | { |
| 2849 | got_abbrev = GetLocaleInfo (XINT (lcid), |
| 2850 | LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP, |
| 2851 | abbrev_name, sizeof (abbrev_name)); |
| 2852 | if (got_abbrev) |
| 2853 | return build_string (abbrev_name); |
| 2854 | } |
| 2855 | else if (EQ (longform, Qt)) |
| 2856 | { |
| 2857 | got_full = GetLocaleInfo (XINT (lcid), |
| 2858 | LOCALE_SLANGUAGE | LOCALE_USE_CP_ACP, |
| 2859 | full_name, sizeof (full_name)); |
| 2860 | if (got_full) |
| 2861 | return DECODE_SYSTEM (build_string (full_name)); |
| 2862 | } |
| 2863 | else if (NUMBERP (longform)) |
| 2864 | { |
| 2865 | got_full = GetLocaleInfo (XINT (lcid), |
| 2866 | XINT (longform), |
| 2867 | full_name, sizeof (full_name)); |
| 2868 | /* GetLocaleInfo's return value includes the terminating null |
| 2869 | character, when the returned information is a string, whereas |
| 2870 | make_unibyte_string needs the string length without the |
| 2871 | terminating null. */ |
| 2872 | if (got_full) |
| 2873 | return make_unibyte_string (full_name, got_full - 1); |
| 2874 | } |
| 2875 | |
| 2876 | return Qnil; |
| 2877 | } |
| 2878 | |
| 2879 | |
| 2880 | DEFUN ("w32-get-current-locale-id", Fw32_get_current_locale_id, |
| 2881 | Sw32_get_current_locale_id, 0, 0, 0, |
| 2882 | doc: /* Return Windows locale id for current locale setting. |
| 2883 | This is a numerical value; use `w32-get-locale-info' to convert to a |
| 2884 | human-readable form. */) |
| 2885 | (void) |
| 2886 | { |
| 2887 | return make_number (GetThreadLocale ()); |
| 2888 | } |
| 2889 | |
| 2890 | static DWORD |
| 2891 | int_from_hex (char * s) |
| 2892 | { |
| 2893 | DWORD val = 0; |
| 2894 | static char hex[] = "0123456789abcdefABCDEF"; |
| 2895 | char * p; |
| 2896 | |
| 2897 | while (*s && (p = strchr (hex, *s)) != NULL) |
| 2898 | { |
| 2899 | unsigned digit = p - hex; |
| 2900 | if (digit > 15) |
| 2901 | digit -= 6; |
| 2902 | val = val * 16 + digit; |
| 2903 | s++; |
| 2904 | } |
| 2905 | return val; |
| 2906 | } |
| 2907 | |
| 2908 | /* We need to build a global list, since the EnumSystemLocale callback |
| 2909 | function isn't given a context pointer. */ |
| 2910 | Lisp_Object Vw32_valid_locale_ids; |
| 2911 | |
| 2912 | static BOOL CALLBACK |
| 2913 | enum_locale_fn (LPTSTR localeNum) |
| 2914 | { |
| 2915 | DWORD id = int_from_hex (localeNum); |
| 2916 | Vw32_valid_locale_ids = Fcons (make_number (id), Vw32_valid_locale_ids); |
| 2917 | return TRUE; |
| 2918 | } |
| 2919 | |
| 2920 | DEFUN ("w32-get-valid-locale-ids", Fw32_get_valid_locale_ids, |
| 2921 | Sw32_get_valid_locale_ids, 0, 0, 0, |
| 2922 | doc: /* Return list of all valid Windows locale ids. |
| 2923 | Each id is a numerical value; use `w32-get-locale-info' to convert to a |
| 2924 | human-readable form. */) |
| 2925 | (void) |
| 2926 | { |
| 2927 | Vw32_valid_locale_ids = Qnil; |
| 2928 | |
| 2929 | EnumSystemLocales (enum_locale_fn, LCID_SUPPORTED); |
| 2930 | |
| 2931 | Vw32_valid_locale_ids = Fnreverse (Vw32_valid_locale_ids); |
| 2932 | return Vw32_valid_locale_ids; |
| 2933 | } |
| 2934 | |
| 2935 | |
| 2936 | DEFUN ("w32-get-default-locale-id", Fw32_get_default_locale_id, Sw32_get_default_locale_id, 0, 1, 0, |
| 2937 | doc: /* Return Windows locale id for default locale setting. |
| 2938 | By default, the system default locale setting is returned; if the optional |
| 2939 | parameter USERP is non-nil, the user default locale setting is returned. |
| 2940 | This is a numerical value; use `w32-get-locale-info' to convert to a |
| 2941 | human-readable form. */) |
| 2942 | (Lisp_Object userp) |
| 2943 | { |
| 2944 | if (NILP (userp)) |
| 2945 | return make_number (GetSystemDefaultLCID ()); |
| 2946 | return make_number (GetUserDefaultLCID ()); |
| 2947 | } |
| 2948 | |
| 2949 | |
| 2950 | DEFUN ("w32-set-current-locale", Fw32_set_current_locale, Sw32_set_current_locale, 1, 1, 0, |
| 2951 | doc: /* Make Windows locale LCID be the current locale setting for Emacs. |
| 2952 | If successful, the new locale id is returned, otherwise nil. */) |
| 2953 | (Lisp_Object lcid) |
| 2954 | { |
| 2955 | CHECK_NUMBER (lcid); |
| 2956 | |
| 2957 | if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED)) |
| 2958 | return Qnil; |
| 2959 | |
| 2960 | if (!SetThreadLocale (XINT (lcid))) |
| 2961 | return Qnil; |
| 2962 | |
| 2963 | /* Need to set input thread locale if present. */ |
| 2964 | if (dwWindowsThreadId) |
| 2965 | /* Reply is not needed. */ |
| 2966 | PostThreadMessage (dwWindowsThreadId, WM_EMACS_SETLOCALE, XINT (lcid), 0); |
| 2967 | |
| 2968 | return make_number (GetThreadLocale ()); |
| 2969 | } |
| 2970 | |
| 2971 | |
| 2972 | /* We need to build a global list, since the EnumCodePages callback |
| 2973 | function isn't given a context pointer. */ |
| 2974 | Lisp_Object Vw32_valid_codepages; |
| 2975 | |
| 2976 | static BOOL CALLBACK |
| 2977 | enum_codepage_fn (LPTSTR codepageNum) |
| 2978 | { |
| 2979 | DWORD id = atoi (codepageNum); |
| 2980 | Vw32_valid_codepages = Fcons (make_number (id), Vw32_valid_codepages); |
| 2981 | return TRUE; |
| 2982 | } |
| 2983 | |
| 2984 | DEFUN ("w32-get-valid-codepages", Fw32_get_valid_codepages, |
| 2985 | Sw32_get_valid_codepages, 0, 0, 0, |
| 2986 | doc: /* Return list of all valid Windows codepages. */) |
| 2987 | (void) |
| 2988 | { |
| 2989 | Vw32_valid_codepages = Qnil; |
| 2990 | |
| 2991 | EnumSystemCodePages (enum_codepage_fn, CP_SUPPORTED); |
| 2992 | |
| 2993 | Vw32_valid_codepages = Fnreverse (Vw32_valid_codepages); |
| 2994 | return Vw32_valid_codepages; |
| 2995 | } |
| 2996 | |
| 2997 | |
| 2998 | DEFUN ("w32-get-console-codepage", Fw32_get_console_codepage, |
| 2999 | Sw32_get_console_codepage, 0, 0, 0, |
| 3000 | doc: /* Return current Windows codepage for console input. */) |
| 3001 | (void) |
| 3002 | { |
| 3003 | return make_number (GetConsoleCP ()); |
| 3004 | } |
| 3005 | |
| 3006 | |
| 3007 | DEFUN ("w32-set-console-codepage", Fw32_set_console_codepage, |
| 3008 | Sw32_set_console_codepage, 1, 1, 0, |
| 3009 | doc: /* Make Windows codepage CP be the codepage for Emacs tty keyboard input. |
| 3010 | This codepage setting affects keyboard input in tty mode. |
| 3011 | If successful, the new CP is returned, otherwise nil. */) |
| 3012 | (Lisp_Object cp) |
| 3013 | { |
| 3014 | CHECK_NUMBER (cp); |
| 3015 | |
| 3016 | if (!IsValidCodePage (XINT (cp))) |
| 3017 | return Qnil; |
| 3018 | |
| 3019 | if (!SetConsoleCP (XINT (cp))) |
| 3020 | return Qnil; |
| 3021 | |
| 3022 | return make_number (GetConsoleCP ()); |
| 3023 | } |
| 3024 | |
| 3025 | |
| 3026 | DEFUN ("w32-get-console-output-codepage", Fw32_get_console_output_codepage, |
| 3027 | Sw32_get_console_output_codepage, 0, 0, 0, |
| 3028 | doc: /* Return current Windows codepage for console output. */) |
| 3029 | (void) |
| 3030 | { |
| 3031 | return make_number (GetConsoleOutputCP ()); |
| 3032 | } |
| 3033 | |
| 3034 | |
| 3035 | DEFUN ("w32-set-console-output-codepage", Fw32_set_console_output_codepage, |
| 3036 | Sw32_set_console_output_codepage, 1, 1, 0, |
| 3037 | doc: /* Make Windows codepage CP be the codepage for Emacs console output. |
| 3038 | This codepage setting affects display in tty mode. |
| 3039 | If successful, the new CP is returned, otherwise nil. */) |
| 3040 | (Lisp_Object cp) |
| 3041 | { |
| 3042 | CHECK_NUMBER (cp); |
| 3043 | |
| 3044 | if (!IsValidCodePage (XINT (cp))) |
| 3045 | return Qnil; |
| 3046 | |
| 3047 | if (!SetConsoleOutputCP (XINT (cp))) |
| 3048 | return Qnil; |
| 3049 | |
| 3050 | return make_number (GetConsoleOutputCP ()); |
| 3051 | } |
| 3052 | |
| 3053 | |
| 3054 | DEFUN ("w32-get-codepage-charset", Fw32_get_codepage_charset, |
| 3055 | Sw32_get_codepage_charset, 1, 1, 0, |
| 3056 | doc: /* Return charset ID corresponding to codepage CP. |
| 3057 | Returns nil if the codepage is not valid. */) |
| 3058 | (Lisp_Object cp) |
| 3059 | { |
| 3060 | CHARSETINFO info; |
| 3061 | |
| 3062 | CHECK_NUMBER (cp); |
| 3063 | |
| 3064 | if (!IsValidCodePage (XINT (cp))) |
| 3065 | return Qnil; |
| 3066 | |
| 3067 | if (TranslateCharsetInfo ((DWORD *) XINT (cp), &info, TCI_SRCCODEPAGE)) |
| 3068 | return make_number (info.ciCharset); |
| 3069 | |
| 3070 | return Qnil; |
| 3071 | } |
| 3072 | |
| 3073 | |
| 3074 | DEFUN ("w32-get-valid-keyboard-layouts", Fw32_get_valid_keyboard_layouts, |
| 3075 | Sw32_get_valid_keyboard_layouts, 0, 0, 0, |
| 3076 | doc: /* Return list of Windows keyboard languages and layouts. |
| 3077 | The return value is a list of pairs of language id and layout id. */) |
| 3078 | (void) |
| 3079 | { |
| 3080 | int num_layouts = GetKeyboardLayoutList (0, NULL); |
| 3081 | HKL * layouts = (HKL *) alloca (num_layouts * sizeof (HKL)); |
| 3082 | Lisp_Object obj = Qnil; |
| 3083 | |
| 3084 | if (GetKeyboardLayoutList (num_layouts, layouts) == num_layouts) |
| 3085 | { |
| 3086 | while (--num_layouts >= 0) |
| 3087 | { |
| 3088 | HKL kl = layouts[num_layouts]; |
| 3089 | |
| 3090 | obj = Fcons (Fcons (make_number (LOWORD (kl)), |
| 3091 | make_number (HIWORD (kl))), |
| 3092 | obj); |
| 3093 | } |
| 3094 | } |
| 3095 | |
| 3096 | return obj; |
| 3097 | } |
| 3098 | |
| 3099 | |
| 3100 | DEFUN ("w32-get-keyboard-layout", Fw32_get_keyboard_layout, |
| 3101 | Sw32_get_keyboard_layout, 0, 0, 0, |
| 3102 | doc: /* Return current Windows keyboard language and layout. |
| 3103 | The return value is the cons of the language id and the layout id. */) |
| 3104 | (void) |
| 3105 | { |
| 3106 | HKL kl = GetKeyboardLayout (dwWindowsThreadId); |
| 3107 | |
| 3108 | return Fcons (make_number (LOWORD (kl)), |
| 3109 | make_number (HIWORD (kl))); |
| 3110 | } |
| 3111 | |
| 3112 | |
| 3113 | DEFUN ("w32-set-keyboard-layout", Fw32_set_keyboard_layout, |
| 3114 | Sw32_set_keyboard_layout, 1, 1, 0, |
| 3115 | doc: /* Make LAYOUT be the current keyboard layout for Emacs. |
| 3116 | The keyboard layout setting affects interpretation of keyboard input. |
| 3117 | If successful, the new layout id is returned, otherwise nil. */) |
| 3118 | (Lisp_Object layout) |
| 3119 | { |
| 3120 | HKL kl; |
| 3121 | |
| 3122 | CHECK_CONS (layout); |
| 3123 | CHECK_NUMBER_CAR (layout); |
| 3124 | CHECK_NUMBER_CDR (layout); |
| 3125 | |
| 3126 | kl = (HKL) ((XINT (XCAR (layout)) & 0xffff) |
| 3127 | | (XINT (XCDR (layout)) << 16)); |
| 3128 | |
| 3129 | /* Synchronize layout with input thread. */ |
| 3130 | if (dwWindowsThreadId) |
| 3131 | { |
| 3132 | if (PostThreadMessage (dwWindowsThreadId, WM_EMACS_SETKEYBOARDLAYOUT, |
| 3133 | (WPARAM) kl, 0)) |
| 3134 | { |
| 3135 | MSG msg; |
| 3136 | GetMessage (&msg, NULL, WM_EMACS_DONE, WM_EMACS_DONE); |
| 3137 | |
| 3138 | if (msg.wParam == 0) |
| 3139 | return Qnil; |
| 3140 | } |
| 3141 | } |
| 3142 | else if (!ActivateKeyboardLayout (kl, 0)) |
| 3143 | return Qnil; |
| 3144 | |
| 3145 | return Fw32_get_keyboard_layout (); |
| 3146 | } |
| 3147 | |
| 3148 | \f |
| 3149 | void |
| 3150 | syms_of_ntproc (void) |
| 3151 | { |
| 3152 | DEFSYM (Qhigh, "high"); |
| 3153 | DEFSYM (Qlow, "low"); |
| 3154 | |
| 3155 | defsubr (&Sw32_has_winsock); |
| 3156 | defsubr (&Sw32_unload_winsock); |
| 3157 | |
| 3158 | defsubr (&Sw32_short_file_name); |
| 3159 | defsubr (&Sw32_long_file_name); |
| 3160 | defsubr (&Sw32_set_process_priority); |
| 3161 | defsubr (&Sw32_get_locale_info); |
| 3162 | defsubr (&Sw32_get_current_locale_id); |
| 3163 | defsubr (&Sw32_get_default_locale_id); |
| 3164 | defsubr (&Sw32_get_valid_locale_ids); |
| 3165 | defsubr (&Sw32_set_current_locale); |
| 3166 | |
| 3167 | defsubr (&Sw32_get_console_codepage); |
| 3168 | defsubr (&Sw32_set_console_codepage); |
| 3169 | defsubr (&Sw32_get_console_output_codepage); |
| 3170 | defsubr (&Sw32_set_console_output_codepage); |
| 3171 | defsubr (&Sw32_get_valid_codepages); |
| 3172 | defsubr (&Sw32_get_codepage_charset); |
| 3173 | |
| 3174 | defsubr (&Sw32_get_valid_keyboard_layouts); |
| 3175 | defsubr (&Sw32_get_keyboard_layout); |
| 3176 | defsubr (&Sw32_set_keyboard_layout); |
| 3177 | |
| 3178 | DEFVAR_LISP ("w32-quote-process-args", Vw32_quote_process_args, |
| 3179 | doc: /* Non-nil enables quoting of process arguments to ensure correct parsing. |
| 3180 | Because Windows does not directly pass argv arrays to child processes, |
| 3181 | programs have to reconstruct the argv array by parsing the command |
| 3182 | line string. For an argument to contain a space, it must be enclosed |
| 3183 | in double quotes or it will be parsed as multiple arguments. |
| 3184 | |
| 3185 | If the value is a character, that character will be used to escape any |
| 3186 | quote characters that appear, otherwise a suitable escape character |
| 3187 | will be chosen based on the type of the program. */); |
| 3188 | Vw32_quote_process_args = Qt; |
| 3189 | |
| 3190 | DEFVAR_LISP ("w32-start-process-show-window", |
| 3191 | Vw32_start_process_show_window, |
| 3192 | doc: /* When nil, new child processes hide their windows. |
| 3193 | When non-nil, they show their window in the method of their choice. |
| 3194 | This variable doesn't affect GUI applications, which will never be hidden. */); |
| 3195 | Vw32_start_process_show_window = Qnil; |
| 3196 | |
| 3197 | DEFVAR_LISP ("w32-start-process-share-console", |
| 3198 | Vw32_start_process_share_console, |
| 3199 | doc: /* When nil, new child processes are given a new console. |
| 3200 | When non-nil, they share the Emacs console; this has the limitation of |
| 3201 | allowing only one DOS subprocess to run at a time (whether started directly |
| 3202 | or indirectly by Emacs), and preventing Emacs from cleanly terminating the |
| 3203 | subprocess group, but may allow Emacs to interrupt a subprocess that doesn't |
| 3204 | otherwise respond to interrupts from Emacs. */); |
| 3205 | Vw32_start_process_share_console = Qnil; |
| 3206 | |
| 3207 | DEFVAR_LISP ("w32-start-process-inherit-error-mode", |
| 3208 | Vw32_start_process_inherit_error_mode, |
| 3209 | doc: /* When nil, new child processes revert to the default error mode. |
| 3210 | When non-nil, they inherit their error mode setting from Emacs, which stops |
| 3211 | them blocking when trying to access unmounted drives etc. */); |
| 3212 | Vw32_start_process_inherit_error_mode = Qt; |
| 3213 | |
| 3214 | DEFVAR_INT ("w32-pipe-read-delay", w32_pipe_read_delay, |
| 3215 | doc: /* Forced delay before reading subprocess output. |
| 3216 | This is done to improve the buffering of subprocess output, by |
| 3217 | avoiding the inefficiency of frequently reading small amounts of data. |
| 3218 | |
| 3219 | If positive, the value is the number of milliseconds to sleep before |
| 3220 | reading the subprocess output. If negative, the magnitude is the number |
| 3221 | of time slices to wait (effectively boosting the priority of the child |
| 3222 | process temporarily). A value of zero disables waiting entirely. */); |
| 3223 | w32_pipe_read_delay = 50; |
| 3224 | |
| 3225 | DEFVAR_LISP ("w32-downcase-file-names", Vw32_downcase_file_names, |
| 3226 | doc: /* Non-nil means convert all-upper case file names to lower case. |
| 3227 | This applies when performing completions and file name expansion. |
| 3228 | Note that the value of this setting also affects remote file names, |
| 3229 | so you probably don't want to set to non-nil if you use case-sensitive |
| 3230 | filesystems via ange-ftp. */); |
| 3231 | Vw32_downcase_file_names = Qnil; |
| 3232 | |
| 3233 | #if 0 |
| 3234 | DEFVAR_LISP ("w32-generate-fake-inodes", Vw32_generate_fake_inodes, |
| 3235 | doc: /* Non-nil means attempt to fake realistic inode values. |
| 3236 | This works by hashing the truename of files, and should detect |
| 3237 | aliasing between long and short (8.3 DOS) names, but can have |
| 3238 | false positives because of hash collisions. Note that determining |
| 3239 | the truename of a file can be slow. */); |
| 3240 | Vw32_generate_fake_inodes = Qnil; |
| 3241 | #endif |
| 3242 | |
| 3243 | DEFVAR_LISP ("w32-get-true-file-attributes", Vw32_get_true_file_attributes, |
| 3244 | doc: /* Non-nil means determine accurate file attributes in `file-attributes'. |
| 3245 | This option controls whether to issue additional system calls to determine |
| 3246 | accurate link counts, file type, and ownership information. It is more |
| 3247 | useful for files on NTFS volumes, where hard links and file security are |
| 3248 | supported, than on volumes of the FAT family. |
| 3249 | |
| 3250 | Without these system calls, link count will always be reported as 1 and file |
| 3251 | ownership will be attributed to the current user. |
| 3252 | The default value `local' means only issue these system calls for files |
| 3253 | on local fixed drives. A value of nil means never issue them. |
| 3254 | Any other non-nil value means do this even on remote and removable drives |
| 3255 | where the performance impact may be noticeable even on modern hardware. */); |
| 3256 | Vw32_get_true_file_attributes = Qlocal; |
| 3257 | |
| 3258 | staticpro (&Vw32_valid_locale_ids); |
| 3259 | staticpro (&Vw32_valid_codepages); |
| 3260 | } |
| 3261 | /* end of w32proc.c */ |