Mercurial > hg > CbC > CbC_gcc
annotate libiberty/pex-win32.c @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | 77e2b8dfacca |
| children | 84e7813d76e9 |
| rev | line source |
|---|---|
| 0 | 1 /* Utilities to execute a program in a subprocess (possibly linked by pipes |
| 2 with other subprocesses), and wait for it. Generic Win32 specialization. | |
| 111 | 3 Copyright (C) 1996-2017 Free Software Foundation, Inc. |
| 0 | 4 |
| 5 This file is part of the libiberty library. | |
| 6 Libiberty is free software; you can redistribute it and/or | |
| 7 modify it under the terms of the GNU Library General Public | |
| 8 License as published by the Free Software Foundation; either | |
| 9 version 2 of the License, or (at your option) any later version. | |
| 10 | |
| 11 Libiberty is distributed in the hope that it will be useful, | |
| 12 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 Library General Public License for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU Library General Public | |
| 17 License along with libiberty; see the file COPYING.LIB. If not, | |
| 18 write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, | |
| 19 Boston, MA 02110-1301, USA. */ | |
| 20 | |
| 21 #include "pex-common.h" | |
| 22 | |
| 23 #include <windows.h> | |
| 24 | |
| 25 #ifdef HAVE_STDLIB_H | |
| 26 #include <stdlib.h> | |
| 27 #endif | |
| 28 #ifdef HAVE_STRING_H | |
| 29 #include <string.h> | |
| 30 #endif | |
| 31 #ifdef HAVE_UNISTD_H | |
| 32 #include <unistd.h> | |
| 33 #endif | |
| 34 #ifdef HAVE_SYS_WAIT_H | |
| 35 #include <sys/wait.h> | |
| 36 #endif | |
| 37 | |
| 38 #include <assert.h> | |
| 39 #include <process.h> | |
| 40 #include <io.h> | |
| 41 #include <fcntl.h> | |
| 42 #include <signal.h> | |
| 43 #include <sys/stat.h> | |
| 44 #include <errno.h> | |
| 45 #include <ctype.h> | |
| 46 | |
| 47 /* mingw32 headers may not define the following. */ | |
| 48 | |
| 49 #ifndef _P_WAIT | |
| 50 # define _P_WAIT 0 | |
| 51 # define _P_NOWAIT 1 | |
| 52 # define _P_OVERLAY 2 | |
| 53 # define _P_NOWAITO 3 | |
| 54 # define _P_DETACH 4 | |
| 55 | |
| 56 # define WAIT_CHILD 0 | |
| 57 # define WAIT_GRANDCHILD 1 | |
| 58 #endif | |
| 59 | |
| 60 #define MINGW_NAME "Minimalist GNU for Windows" | |
| 61 #define MINGW_NAME_LEN (sizeof(MINGW_NAME) - 1) | |
| 62 | |
| 63 extern char *stpcpy (char *dst, const char *src); | |
| 64 | |
| 65 /* Ensure that the executable pathname uses Win32 backslashes. This | |
| 66 is not necessary on NT, but on W9x, forward slashes causes | |
| 67 failure of spawn* and exec* functions (and probably any function | |
| 68 that calls CreateProcess) *iff* the executable pathname (argv[0]) | |
| 69 is a quoted string. And quoting is necessary in case a pathname | |
| 70 contains embedded white space. You can't win. */ | |
| 71 static void | |
| 72 backslashify (char *s) | |
| 73 { | |
| 74 while ((s = strchr (s, '/')) != NULL) | |
| 75 *s = '\\'; | |
| 76 return; | |
| 77 } | |
| 78 | |
| 79 static int pex_win32_open_read (struct pex_obj *, const char *, int); | |
| 111 | 80 static int pex_win32_open_write (struct pex_obj *, const char *, int, int); |
| 0 | 81 static pid_t pex_win32_exec_child (struct pex_obj *, int, const char *, |
| 82 char * const *, char * const *, | |
| 83 int, int, int, int, | |
| 84 const char **, int *); | |
| 85 static int pex_win32_close (struct pex_obj *, int); | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
86 static pid_t pex_win32_wait (struct pex_obj *, pid_t, int *, |
| 0 | 87 struct pex_time *, int, const char **, int *); |
| 88 static int pex_win32_pipe (struct pex_obj *, int *, int); | |
| 89 static FILE *pex_win32_fdopenr (struct pex_obj *, int, int); | |
| 90 static FILE *pex_win32_fdopenw (struct pex_obj *, int, int); | |
| 91 | |
| 92 /* The list of functions we pass to the common routines. */ | |
| 93 | |
| 94 const struct pex_funcs funcs = | |
| 95 { | |
| 96 pex_win32_open_read, | |
| 97 pex_win32_open_write, | |
| 98 pex_win32_exec_child, | |
| 99 pex_win32_close, | |
| 100 pex_win32_wait, | |
| 101 pex_win32_pipe, | |
| 102 pex_win32_fdopenr, | |
| 103 pex_win32_fdopenw, | |
| 104 NULL /* cleanup */ | |
| 105 }; | |
| 106 | |
| 107 /* Return a newly initialized pex_obj structure. */ | |
| 108 | |
| 109 struct pex_obj * | |
| 110 pex_init (int flags, const char *pname, const char *tempbase) | |
| 111 { | |
| 112 return pex_init_common (flags, pname, tempbase, &funcs); | |
| 113 } | |
| 114 | |
| 115 /* Open a file for reading. */ | |
| 116 | |
| 117 static int | |
| 118 pex_win32_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name, | |
| 119 int binary) | |
| 120 { | |
| 121 return _open (name, _O_RDONLY | (binary ? _O_BINARY : _O_TEXT)); | |
| 122 } | |
| 123 | |
| 124 /* Open a file for writing. */ | |
| 125 | |
| 126 static int | |
| 127 pex_win32_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name, | |
| 111 | 128 int binary, int append) |
| 0 | 129 { |
| 130 /* Note that we can't use O_EXCL here because gcc may have already | |
| 131 created the temporary file via make_temp_file. */ | |
| 111 | 132 if (append) |
| 133 return -1; | |
| 0 | 134 return _open (name, |
| 135 (_O_WRONLY | _O_CREAT | _O_TRUNC | |
| 136 | (binary ? _O_BINARY : _O_TEXT)), | |
| 137 _S_IREAD | _S_IWRITE); | |
| 138 } | |
| 139 | |
| 140 /* Close a file. */ | |
| 141 | |
| 142 static int | |
| 143 pex_win32_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd) | |
| 144 { | |
| 145 return _close (fd); | |
| 146 } | |
| 147 | |
| 148 #ifdef USE_MINGW_MSYS | |
| 149 static const char *mingw_keys[] = {"SOFTWARE", "Microsoft", "Windows", "CurrentVersion", "Uninstall", NULL}; | |
| 150 | |
| 151 /* Tack the executable on the end of a (possibly slash terminated) buffer | |
| 152 and convert everything to \. */ | |
| 153 static const char * | |
| 154 tack_on_executable (char *buf, const char *executable) | |
| 155 { | |
| 156 char *p = strchr (buf, '\0'); | |
| 157 if (p > buf && (p[-1] == '\\' || p[-1] == '/')) | |
| 158 p[-1] = '\0'; | |
| 159 backslashify (strcat (buf, executable)); | |
| 160 return buf; | |
| 161 } | |
| 162 | |
| 163 /* Walk down a registry hierarchy until the end. Return the key. */ | |
| 164 static HKEY | |
| 165 openkey (HKEY hStart, const char *keys[]) | |
| 166 { | |
| 167 HKEY hKey, hTmp; | |
| 168 for (hKey = hStart; *keys; keys++) | |
| 169 { | |
| 170 LONG res; | |
| 171 hTmp = hKey; | |
| 172 res = RegOpenKey (hTmp, *keys, &hKey); | |
| 173 | |
| 174 if (hTmp != HKEY_LOCAL_MACHINE) | |
| 175 RegCloseKey (hTmp); | |
| 176 | |
| 177 if (res != ERROR_SUCCESS) | |
| 178 return NULL; | |
| 179 } | |
| 180 return hKey; | |
| 181 } | |
| 182 | |
| 183 /* Return the "mingw root" as derived from the mingw uninstall information. */ | |
| 184 static const char * | |
| 185 mingw_rootify (const char *executable) | |
| 186 { | |
| 187 HKEY hKey, hTmp; | |
| 188 DWORD maxlen; | |
| 189 char *namebuf, *foundbuf; | |
| 190 DWORD i; | |
| 191 LONG res; | |
| 192 | |
| 193 /* Open the uninstall "directory". */ | |
| 194 hKey = openkey (HKEY_LOCAL_MACHINE, mingw_keys); | |
| 195 | |
| 196 /* Not found. */ | |
| 197 if (!hKey) | |
| 198 return executable; | |
| 199 | |
| 200 /* Need to enumerate all of the keys here looking for one the most recent | |
| 201 one for MinGW. */ | |
| 202 if (RegQueryInfoKey (hKey, NULL, NULL, NULL, NULL, &maxlen, NULL, NULL, | |
| 203 NULL, NULL, NULL, NULL) != ERROR_SUCCESS) | |
| 204 { | |
| 205 RegCloseKey (hKey); | |
| 206 return executable; | |
| 207 } | |
| 208 namebuf = XNEWVEC (char, ++maxlen); | |
| 209 foundbuf = XNEWVEC (char, maxlen); | |
| 210 foundbuf[0] = '\0'; | |
| 211 if (!namebuf || !foundbuf) | |
| 212 { | |
| 213 RegCloseKey (hKey); | |
| 111 | 214 free (namebuf); |
| 215 free (foundbuf); | |
| 0 | 216 return executable; |
| 217 } | |
| 218 | |
| 219 /* Look through all of the keys for one that begins with Minimal GNU... | |
| 220 Try to get the latest version by doing a string compare although that | |
| 221 string never really works with version number sorting. */ | |
| 222 for (i = 0; RegEnumKey (hKey, i, namebuf, maxlen) == ERROR_SUCCESS; i++) | |
| 223 { | |
| 224 int match = strcasecmp (namebuf, MINGW_NAME); | |
| 225 if (match < 0) | |
| 226 continue; | |
| 227 if (match > 0 && strncasecmp (namebuf, MINGW_NAME, MINGW_NAME_LEN) > 0) | |
| 228 continue; | |
| 229 if (strcasecmp (namebuf, foundbuf) > 0) | |
| 230 strcpy (foundbuf, namebuf); | |
| 231 } | |
| 232 free (namebuf); | |
| 233 | |
| 234 /* If foundbuf is empty, we didn't find anything. Punt. */ | |
| 235 if (!foundbuf[0]) | |
| 236 { | |
| 237 free (foundbuf); | |
| 238 RegCloseKey (hKey); | |
| 239 return executable; | |
| 240 } | |
| 241 | |
| 242 /* Open the key that we wanted */ | |
| 243 res = RegOpenKey (hKey, foundbuf, &hTmp); | |
| 244 RegCloseKey (hKey); | |
| 245 free (foundbuf); | |
| 246 | |
| 247 /* Don't know why this would fail, but you gotta check */ | |
| 248 if (res != ERROR_SUCCESS) | |
| 249 return executable; | |
| 250 | |
| 251 maxlen = 0; | |
| 252 /* Get the length of the value pointed to by InstallLocation */ | |
| 253 if (RegQueryValueEx (hTmp, "InstallLocation", 0, NULL, NULL, | |
| 254 &maxlen) != ERROR_SUCCESS || maxlen == 0) | |
| 255 { | |
| 256 RegCloseKey (hTmp); | |
| 257 return executable; | |
| 258 } | |
| 259 | |
| 260 /* Allocate space for the install location */ | |
| 261 foundbuf = XNEWVEC (char, maxlen + strlen (executable)); | |
| 262 if (!foundbuf) | |
| 263 { | |
| 264 free (foundbuf); | |
| 265 RegCloseKey (hTmp); | |
| 266 } | |
| 267 | |
| 268 /* Read the install location into the buffer */ | |
| 269 res = RegQueryValueEx (hTmp, "InstallLocation", 0, NULL, (LPBYTE) foundbuf, | |
| 270 &maxlen); | |
| 271 RegCloseKey (hTmp); | |
| 272 if (res != ERROR_SUCCESS) | |
| 273 { | |
| 274 free (foundbuf); | |
| 275 return executable; | |
| 276 } | |
| 277 | |
| 278 /* Concatenate the install location and the executable, turn all slashes | |
| 279 to backslashes, and return that. */ | |
| 280 return tack_on_executable (foundbuf, executable); | |
| 281 } | |
| 282 | |
| 283 /* Read the install location of msys from it's installation file and | |
| 284 rootify the executable based on that. */ | |
| 285 static const char * | |
| 286 msys_rootify (const char *executable) | |
| 287 { | |
| 288 size_t bufsize = 64; | |
| 289 size_t execlen = strlen (executable) + 1; | |
| 290 char *buf; | |
| 291 DWORD res = 0; | |
| 292 for (;;) | |
| 293 { | |
| 294 buf = XNEWVEC (char, bufsize + execlen); | |
| 295 if (!buf) | |
| 296 break; | |
| 297 res = GetPrivateProfileString ("InstallSettings", "InstallPath", NULL, | |
| 298 buf, bufsize, "msys.ini"); | |
| 299 if (!res) | |
| 300 break; | |
| 301 if (strlen (buf) < bufsize) | |
| 302 break; | |
| 303 res = 0; | |
| 304 free (buf); | |
| 305 bufsize *= 2; | |
| 306 if (bufsize > 65536) | |
| 307 { | |
| 308 buf = NULL; | |
| 309 break; | |
| 310 } | |
| 311 } | |
| 312 | |
| 313 if (res) | |
| 314 return tack_on_executable (buf, executable); | |
| 315 | |
| 316 /* failed */ | |
| 111 | 317 free (buf); |
| 0 | 318 return executable; |
| 319 } | |
| 320 #endif | |
| 321 | |
| 322 /* Return the number of arguments in an argv array, not including the null | |
| 323 terminating argument. */ | |
| 324 | |
| 325 static int | |
| 326 argv_to_argc (char *const *argv) | |
| 327 { | |
| 328 char *const *i = argv; | |
| 329 while (*i) | |
| 330 i++; | |
| 331 return i - argv; | |
| 332 } | |
| 333 | |
| 334 /* Return a Windows command-line from ARGV. It is the caller's | |
| 335 responsibility to free the string returned. */ | |
| 336 | |
| 337 static char * | |
| 338 argv_to_cmdline (char *const *argv) | |
| 339 { | |
| 340 char *cmdline; | |
| 341 char *p; | |
| 342 size_t cmdline_len; | |
| 343 int i, j, k; | |
| 111 | 344 int needs_quotes; |
| 0 | 345 |
| 346 cmdline_len = 0; | |
| 347 for (i = 0; argv[i]; i++) | |
| 348 { | |
| 111 | 349 /* We only quote arguments that contain spaces, \t or " characters to |
| 350 prevent wasting 2 chars per argument of the CreateProcess 32k char | |
| 351 limit. We need only escape embedded double-quotes and immediately | |
| 0 | 352 preceeding backslash characters. A sequence of backslach characters |
| 353 that is not follwed by a double quote character will not be | |
| 354 escaped. */ | |
| 111 | 355 needs_quotes = 0; |
| 0 | 356 for (j = 0; argv[i][j]; j++) |
| 357 { | |
| 111 | 358 if (argv[i][j] == ' ' || argv[i][j] == '\t' || argv[i][j] == '"') |
| 359 { | |
| 360 needs_quotes = 1; | |
| 361 } | |
| 362 | |
| 0 | 363 if (argv[i][j] == '"') |
| 364 { | |
| 365 /* Escape preceeding backslashes. */ | |
| 366 for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
| 367 cmdline_len++; | |
| 368 /* Escape the qote character. */ | |
| 369 cmdline_len++; | |
| 370 } | |
| 371 } | |
| 111 | 372 if (j == 0) |
| 373 needs_quotes = 1; | |
| 0 | 374 /* Trailing backslashes also need to be escaped because they will be |
| 375 followed by the terminating quote. */ | |
| 111 | 376 if (needs_quotes) |
| 377 { | |
| 378 for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
| 379 cmdline_len++; | |
| 380 } | |
| 0 | 381 cmdline_len += j; |
| 111 | 382 /* for leading and trailing quotes and space */ |
| 383 cmdline_len += needs_quotes * 2 + 1; | |
| 0 | 384 } |
| 385 cmdline = XNEWVEC (char, cmdline_len); | |
| 386 p = cmdline; | |
| 387 for (i = 0; argv[i]; i++) | |
| 388 { | |
| 111 | 389 needs_quotes = 0; |
| 390 for (j = 0; argv[i][j]; j++) | |
| 391 { | |
| 392 if (argv[i][j] == ' ' || argv[i][j] == '\t' || argv[i][j] == '"') | |
| 393 { | |
| 394 needs_quotes = 1; | |
| 395 break; | |
| 396 } | |
| 397 } | |
| 398 if (j == 0) | |
| 399 needs_quotes = 1; | |
| 400 | |
| 401 if (needs_quotes) | |
| 402 { | |
| 403 *p++ = '"'; | |
| 404 } | |
| 0 | 405 for (j = 0; argv[i][j]; j++) |
| 406 { | |
| 407 if (argv[i][j] == '"') | |
| 408 { | |
| 409 for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
| 410 *p++ = '\\'; | |
| 411 *p++ = '\\'; | |
| 412 } | |
| 413 *p++ = argv[i][j]; | |
| 414 } | |
| 111 | 415 if (needs_quotes) |
| 416 { | |
| 417 for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
| 418 *p++ = '\\'; | |
| 419 *p++ = '"'; | |
| 420 } | |
| 0 | 421 *p++ = ' '; |
| 422 } | |
| 423 p[-1] = '\0'; | |
| 424 return cmdline; | |
| 425 } | |
| 426 | |
| 427 /* We'll try the passed filename with all the known standard | |
| 428 extensions, and then without extension. We try no extension | |
| 429 last so that we don't try to run some random extension-less | |
| 430 file that might be hanging around. We try both extension | |
| 431 and no extension so that we don't need any fancy logic | |
| 432 to determine if a file has extension. */ | |
| 433 static const char *const | |
| 434 std_suffixes[] = { | |
| 435 ".com", | |
| 436 ".exe", | |
| 437 ".bat", | |
| 438 ".cmd", | |
| 439 "", | |
| 440 0 | |
| 441 }; | |
| 442 | |
| 443 /* Returns the full path to PROGRAM. If SEARCH is true, look for | |
| 444 PROGRAM in each directory in PATH. */ | |
| 445 | |
| 446 static char * | |
| 447 find_executable (const char *program, BOOL search) | |
| 448 { | |
| 449 char *full_executable; | |
| 450 char *e; | |
| 451 size_t fe_len; | |
| 452 const char *path = 0; | |
| 453 const char *const *ext; | |
| 454 const char *p, *q; | |
| 455 size_t proglen = strlen (program); | |
| 456 int has_slash = (strchr (program, '/') || strchr (program, '\\')); | |
| 457 HANDLE h; | |
| 458 | |
| 459 if (has_slash) | |
| 460 search = FALSE; | |
| 461 | |
| 462 if (search) | |
| 463 path = getenv ("PATH"); | |
| 464 if (!path) | |
| 465 path = ""; | |
| 466 | |
| 467 fe_len = 0; | |
| 468 for (p = path; *p; p = q) | |
| 469 { | |
| 470 q = p; | |
| 471 while (*q != ';' && *q != '\0') | |
| 472 q++; | |
| 473 if ((size_t)(q - p) > fe_len) | |
| 474 fe_len = q - p; | |
| 475 if (*q == ';') | |
| 476 q++; | |
| 477 } | |
| 478 fe_len = fe_len + 1 + proglen + 5 /* space for extension */; | |
| 479 full_executable = XNEWVEC (char, fe_len); | |
| 480 | |
| 481 p = path; | |
| 482 do | |
| 483 { | |
| 484 q = p; | |
| 485 while (*q != ';' && *q != '\0') | |
| 486 q++; | |
| 487 | |
| 488 e = full_executable; | |
| 489 memcpy (e, p, q - p); | |
| 490 e += (q - p); | |
| 491 if (q - p) | |
| 492 *e++ = '\\'; | |
| 493 strcpy (e, program); | |
| 494 | |
| 495 if (*q == ';') | |
| 496 q++; | |
| 497 | |
| 498 for (e = full_executable; *e; e++) | |
| 499 if (*e == '/') | |
| 500 *e = '\\'; | |
| 501 | |
| 502 /* At this point, e points to the terminating NUL character for | |
| 503 full_executable. */ | |
| 504 for (ext = std_suffixes; *ext; ext++) | |
| 505 { | |
| 506 /* Remove any current extension. */ | |
| 507 *e = '\0'; | |
| 508 /* Add the new one. */ | |
| 509 strcat (full_executable, *ext); | |
| 510 | |
| 511 /* Attempt to open this file. */ | |
| 512 h = CreateFile (full_executable, GENERIC_READ, | |
| 513 FILE_SHARE_READ | FILE_SHARE_WRITE, | |
| 514 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); | |
| 515 if (h != INVALID_HANDLE_VALUE) | |
| 516 goto found; | |
| 517 } | |
| 518 p = q; | |
| 519 } | |
| 520 while (*p); | |
| 521 free (full_executable); | |
| 522 return 0; | |
| 523 | |
| 524 found: | |
| 525 CloseHandle (h); | |
| 526 return full_executable; | |
| 527 } | |
| 528 | |
| 529 /* Low-level process creation function and helper. */ | |
| 530 | |
| 531 static int | |
| 532 env_compare (const void *a_ptr, const void *b_ptr) | |
| 533 { | |
| 534 const char *a; | |
| 535 const char *b; | |
| 536 unsigned char c1; | |
| 537 unsigned char c2; | |
| 538 | |
| 539 a = *(const char **) a_ptr; | |
| 540 b = *(const char **) b_ptr; | |
| 541 | |
| 542 /* a and b will be of the form: VAR=VALUE | |
| 543 We compare only the variable name part here using a case-insensitive | |
| 544 comparison algorithm. It might appear that in fact strcasecmp () can | |
| 545 take the place of this whole function, and indeed it could, save for | |
| 546 the fact that it would fail in cases such as comparing A1=foo and | |
| 547 A=bar (because 1 is less than = in the ASCII character set). | |
| 548 (Environment variables containing no numbers would work in such a | |
| 549 scenario.) */ | |
| 550 | |
| 551 do | |
| 552 { | |
| 553 c1 = (unsigned char) tolower (*a++); | |
| 554 c2 = (unsigned char) tolower (*b++); | |
| 555 | |
| 556 if (c1 == '=') | |
| 557 c1 = '\0'; | |
| 558 | |
| 559 if (c2 == '=') | |
| 560 c2 = '\0'; | |
| 561 } | |
| 562 while (c1 == c2 && c1 != '\0'); | |
| 563 | |
| 564 return c1 - c2; | |
| 565 } | |
| 566 | |
| 567 /* Execute a Windows executable as a child process. This will fail if the | |
| 568 * target is not actually an executable, such as if it is a shell script. */ | |
| 569 | |
| 570 static pid_t | |
| 571 win32_spawn (const char *executable, | |
| 572 BOOL search, | |
| 573 char *const *argv, | |
| 574 char *const *env, /* array of strings of the form: VAR=VALUE */ | |
| 575 DWORD dwCreationFlags, | |
| 576 LPSTARTUPINFO si, | |
| 577 LPPROCESS_INFORMATION pi) | |
| 578 { | |
| 579 char *full_executable; | |
| 580 char *cmdline; | |
| 581 char **env_copy; | |
| 582 char *env_block = NULL; | |
| 583 | |
| 584 full_executable = NULL; | |
| 585 cmdline = NULL; | |
| 586 | |
| 587 if (env) | |
| 588 { | |
| 589 int env_size; | |
| 590 | |
| 591 /* Count the number of environment bindings supplied. */ | |
| 592 for (env_size = 0; env[env_size]; env_size++) | |
| 593 continue; | |
| 594 | |
| 595 /* Assemble an environment block, if required. This consists of | |
| 596 VAR=VALUE strings juxtaposed (with one null character between each | |
| 597 pair) and an additional null at the end. */ | |
| 598 if (env_size > 0) | |
| 599 { | |
| 600 int var; | |
| 601 int total_size = 1; /* 1 is for the final null. */ | |
| 602 char *bufptr; | |
| 603 | |
| 604 /* Windows needs the members of the block to be sorted by variable | |
| 605 name. */ | |
| 606 env_copy = (char **) alloca (sizeof (char *) * env_size); | |
| 607 memcpy (env_copy, env, sizeof (char *) * env_size); | |
| 608 qsort (env_copy, env_size, sizeof (char *), env_compare); | |
| 609 | |
| 610 for (var = 0; var < env_size; var++) | |
| 611 total_size += strlen (env[var]) + 1; | |
| 612 | |
| 613 env_block = XNEWVEC (char, total_size); | |
| 614 bufptr = env_block; | |
| 615 for (var = 0; var < env_size; var++) | |
| 616 bufptr = stpcpy (bufptr, env_copy[var]) + 1; | |
| 617 | |
| 618 *bufptr = '\0'; | |
| 619 } | |
| 620 } | |
| 621 | |
| 622 full_executable = find_executable (executable, search); | |
| 623 if (!full_executable) | |
| 624 goto error; | |
| 625 cmdline = argv_to_cmdline (argv); | |
| 626 if (!cmdline) | |
| 627 goto error; | |
| 628 | |
| 629 /* Create the child process. */ | |
| 630 if (!CreateProcess (full_executable, cmdline, | |
| 631 /*lpProcessAttributes=*/NULL, | |
| 632 /*lpThreadAttributes=*/NULL, | |
| 633 /*bInheritHandles=*/TRUE, | |
| 634 dwCreationFlags, | |
| 635 (LPVOID) env_block, | |
| 636 /*lpCurrentDirectory=*/NULL, | |
| 637 si, | |
| 638 pi)) | |
| 639 { | |
| 111 | 640 free (env_block); |
| 0 | 641 |
| 642 free (full_executable); | |
| 643 | |
| 644 return (pid_t) -1; | |
| 645 } | |
| 646 | |
| 647 /* Clean up. */ | |
| 648 CloseHandle (pi->hThread); | |
| 649 free (full_executable); | |
| 111 | 650 free (env_block); |
| 0 | 651 |
| 652 return (pid_t) pi->hProcess; | |
| 653 | |
| 654 error: | |
| 111 | 655 free (env_block); |
| 656 free (cmdline); | |
| 657 free (full_executable); | |
| 0 | 658 |
| 659 return (pid_t) -1; | |
| 660 } | |
| 661 | |
| 662 /* Spawn a script. This simulates the Unix script execution mechanism. | |
| 663 This function is called as a fallback if win32_spawn fails. */ | |
| 664 | |
| 665 static pid_t | |
| 666 spawn_script (const char *executable, char *const *argv, | |
| 667 char* const *env, | |
| 668 DWORD dwCreationFlags, | |
| 669 LPSTARTUPINFO si, | |
| 670 LPPROCESS_INFORMATION pi) | |
| 671 { | |
| 672 pid_t pid = (pid_t) -1; | |
| 673 int save_errno = errno; | |
| 674 int fd = _open (executable, _O_RDONLY); | |
| 675 | |
| 676 /* Try to open script, check header format, extract interpreter path, | |
| 677 and spawn script using that interpretter. */ | |
| 678 if (fd >= 0) | |
| 679 { | |
| 680 char buf[MAX_PATH + 5]; | |
| 681 int len = _read (fd, buf, sizeof (buf) - 1); | |
| 682 _close (fd); | |
| 683 if (len > 3) | |
| 684 { | |
| 685 char *eol; | |
| 686 buf[len] = '\0'; | |
| 687 eol = strchr (buf, '\n'); | |
| 688 if (eol && strncmp (buf, "#!", 2) == 0) | |
| 689 { | |
| 690 | |
| 691 /* Header format is OK. */ | |
| 692 char *executable1; | |
| 693 int new_argc; | |
| 694 const char **avhere; | |
| 695 | |
| 696 /* Extract interpreter path. */ | |
| 697 do | |
| 698 *eol = '\0'; | |
| 699 while (*--eol == '\r' || *eol == ' ' || *eol == '\t'); | |
| 700 for (executable1 = buf + 2; *executable1 == ' ' || *executable1 == '\t'; executable1++) | |
| 701 continue; | |
| 702 backslashify (executable1); | |
| 703 | |
| 704 /* Duplicate argv, prepending the interpreter path. */ | |
| 705 new_argc = argv_to_argc (argv) + 1; | |
| 706 avhere = XNEWVEC (const char *, new_argc + 1); | |
| 707 *avhere = executable1; | |
| 708 memcpy (avhere + 1, argv, new_argc * sizeof(*argv)); | |
| 709 argv = (char *const *)avhere; | |
| 710 | |
| 711 /* Spawn the child. */ | |
| 712 #ifndef USE_MINGW_MSYS | |
| 713 executable = strrchr (executable1, '\\') + 1; | |
| 714 if (!executable) | |
| 715 executable = executable1; | |
| 716 pid = win32_spawn (executable, TRUE, argv, env, | |
| 717 dwCreationFlags, si, pi); | |
| 718 #else | |
| 719 if (strchr (executable1, '\\') == NULL) | |
| 720 pid = win32_spawn (executable1, TRUE, argv, env, | |
| 721 dwCreationFlags, si, pi); | |
| 722 else if (executable1[0] != '\\') | |
| 723 pid = win32_spawn (executable1, FALSE, argv, env, | |
| 724 dwCreationFlags, si, pi); | |
| 725 else | |
| 726 { | |
| 727 const char *newex = mingw_rootify (executable1); | |
| 728 *avhere = newex; | |
| 729 pid = win32_spawn (newex, FALSE, argv, env, | |
| 730 dwCreationFlags, si, pi); | |
| 731 if (executable1 != newex) | |
| 732 free ((char *) newex); | |
|
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733 if (pid == (pid_t) -1) |
| 0 | 734 { |
| 735 newex = msys_rootify (executable1); | |
| 736 if (newex != executable1) | |
| 737 { | |
| 738 *avhere = newex; | |
| 739 pid = win32_spawn (newex, FALSE, argv, env, | |
| 740 dwCreationFlags, si, pi); | |
| 741 free ((char *) newex); | |
| 742 } | |
| 743 } | |
| 744 } | |
| 745 #endif | |
| 746 free (avhere); | |
| 747 } | |
| 748 } | |
| 749 } | |
|
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750 if (pid == (pid_t) -1) |
| 0 | 751 errno = save_errno; |
| 752 return pid; | |
| 753 } | |
| 754 | |
| 755 /* Execute a child. */ | |
| 756 | |
| 757 static pid_t | |
| 758 pex_win32_exec_child (struct pex_obj *obj ATTRIBUTE_UNUSED, int flags, | |
| 759 const char *executable, char * const * argv, | |
| 760 char* const* env, | |
| 761 int in, int out, int errdes, | |
| 762 int toclose ATTRIBUTE_UNUSED, | |
| 763 const char **errmsg, | |
| 764 int *err) | |
| 765 { | |
| 766 pid_t pid; | |
| 767 HANDLE stdin_handle; | |
| 768 HANDLE stdout_handle; | |
| 769 HANDLE stderr_handle; | |
| 770 DWORD dwCreationFlags; | |
| 771 OSVERSIONINFO version_info; | |
| 772 STARTUPINFO si; | |
| 773 PROCESS_INFORMATION pi; | |
|
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774 int orig_out, orig_in, orig_err; |
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775 BOOL separate_stderr = !(flags & PEX_STDERR_TO_STDOUT); |
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776 |
| 111 | 777 /* Ensure we have inheritable descriptors to pass to the child. */ |
|
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778 orig_in = in; |
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779 in = _dup (orig_in); |
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780 |
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781 orig_out = out; |
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782 out = _dup (orig_out); |
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783 |
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784 if (separate_stderr) |
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785 { |
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786 orig_err = errdes; |
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787 errdes = _dup (orig_err); |
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788 } |
| 0 | 789 |
| 790 stdin_handle = INVALID_HANDLE_VALUE; | |
| 791 stdout_handle = INVALID_HANDLE_VALUE; | |
| 792 stderr_handle = INVALID_HANDLE_VALUE; | |
| 793 | |
| 794 stdin_handle = (HANDLE) _get_osfhandle (in); | |
| 795 stdout_handle = (HANDLE) _get_osfhandle (out); | |
|
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796 if (separate_stderr) |
| 0 | 797 stderr_handle = (HANDLE) _get_osfhandle (errdes); |
| 798 else | |
| 799 stderr_handle = stdout_handle; | |
| 800 | |
| 801 /* Determine the version of Windows we are running on. */ | |
| 802 version_info.dwOSVersionInfoSize = sizeof (version_info); | |
| 803 GetVersionEx (&version_info); | |
| 804 if (version_info.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) | |
| 805 /* On Windows 95/98/ME the CREATE_NO_WINDOW flag is not | |
| 806 supported, so we cannot avoid creating a console window. */ | |
| 807 dwCreationFlags = 0; | |
| 808 else | |
| 809 { | |
| 810 HANDLE conout_handle; | |
| 811 | |
| 812 /* Determine whether or not we have an associated console. */ | |
| 813 conout_handle = CreateFile("CONOUT$", | |
| 814 GENERIC_WRITE, | |
| 815 FILE_SHARE_WRITE, | |
| 816 /*lpSecurityAttributes=*/NULL, | |
| 817 OPEN_EXISTING, | |
| 818 FILE_ATTRIBUTE_NORMAL, | |
| 819 /*hTemplateFile=*/NULL); | |
| 820 if (conout_handle == INVALID_HANDLE_VALUE) | |
| 821 /* There is no console associated with this process. Since | |
| 822 the child is a console process, the OS would normally | |
| 823 create a new console Window for the child. Since we'll be | |
| 824 redirecting the child's standard streams, we do not need | |
| 825 the console window. */ | |
| 826 dwCreationFlags = CREATE_NO_WINDOW; | |
| 827 else | |
| 828 { | |
| 829 /* There is a console associated with the process, so the OS | |
| 830 will not create a new console. And, if we use | |
| 831 CREATE_NO_WINDOW in this situation, the child will have | |
| 832 no associated console. Therefore, if the child's | |
| 833 standard streams are connected to the console, the output | |
| 834 will be discarded. */ | |
| 835 CloseHandle(conout_handle); | |
| 836 dwCreationFlags = 0; | |
| 837 } | |
| 838 } | |
| 839 | |
| 840 /* Since the child will be a console process, it will, by default, | |
| 841 connect standard input/output to its console. However, we want | |
| 842 the child to use the handles specifically designated above. In | |
| 843 addition, if there is no console (such as when we are running in | |
| 844 a Cygwin X window), then we must redirect the child's | |
| 845 input/output, as there is no console for the child to use. */ | |
| 846 memset (&si, 0, sizeof (si)); | |
| 847 si.cb = sizeof (si); | |
| 848 si.dwFlags = STARTF_USESTDHANDLES; | |
| 849 si.hStdInput = stdin_handle; | |
| 850 si.hStdOutput = stdout_handle; | |
| 851 si.hStdError = stderr_handle; | |
| 852 | |
| 853 /* Create the child process. */ | |
| 854 pid = win32_spawn (executable, (flags & PEX_SEARCH) != 0, | |
| 855 argv, env, dwCreationFlags, &si, &pi); | |
| 856 if (pid == (pid_t) -1) | |
| 857 pid = spawn_script (executable, argv, env, dwCreationFlags, | |
| 858 &si, &pi); | |
| 859 if (pid == (pid_t) -1) | |
| 860 { | |
| 861 *err = ENOENT; | |
| 862 *errmsg = "CreateProcess"; | |
| 863 } | |
| 864 | |
| 111 | 865 /* If the child was created successfully, close the original file |
| 866 descriptors. If the process creation fails, these are closed by | |
| 867 pex_run_in_environment instead. We must not close them twice as | |
| 868 that seems to cause a Windows exception. */ | |
| 869 | |
| 870 if (pid != (pid_t) -1) | |
| 871 { | |
| 872 if (orig_in != STDIN_FILENO) | |
| 873 _close (orig_in); | |
| 874 if (orig_out != STDOUT_FILENO) | |
| 875 _close (orig_out); | |
| 876 if (separate_stderr | |
| 877 && orig_err != STDERR_FILENO) | |
| 878 _close (orig_err); | |
| 879 } | |
| 880 | |
|
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881 /* Close the standard input, standard output and standard error handles |
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882 in the parent. */ |
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883 |
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884 _close (in); |
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885 _close (out); |
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886 if (separate_stderr) |
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887 _close (errdes); |
| 0 | 888 |
| 889 return pid; | |
| 890 } | |
| 891 | |
| 892 /* Wait for a child process to complete. MS CRTDLL doesn't return | |
| 893 enough information in status to decide if the child exited due to a | |
| 894 signal or not, rather it simply returns an integer with the exit | |
| 895 code of the child; eg., if the child exited with an abort() call | |
| 896 and didn't have a handler for SIGABRT, it simply returns with | |
| 897 status == 3. We fix the status code to conform to the usual WIF* | |
| 898 macros. Note that WIFSIGNALED will never be true under CRTDLL. */ | |
| 899 | |
|
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900 static pid_t |
| 0 | 901 pex_win32_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, |
| 902 int *status, struct pex_time *time, int done ATTRIBUTE_UNUSED, | |
| 903 const char **errmsg, int *err) | |
| 904 { | |
| 905 DWORD termstat; | |
| 906 HANDLE h; | |
| 907 | |
| 908 if (time != NULL) | |
| 909 memset (time, 0, sizeof *time); | |
| 910 | |
| 911 h = (HANDLE) pid; | |
| 912 | |
| 913 /* FIXME: If done is non-zero, we should probably try to kill the | |
| 914 process. */ | |
| 915 if (WaitForSingleObject (h, INFINITE) != WAIT_OBJECT_0) | |
| 916 { | |
| 917 CloseHandle (h); | |
| 918 *err = ECHILD; | |
| 919 *errmsg = "WaitForSingleObject"; | |
| 920 return -1; | |
| 921 } | |
| 922 | |
| 923 GetExitCodeProcess (h, &termstat); | |
| 924 CloseHandle (h); | |
| 925 | |
| 926 /* A value of 3 indicates that the child caught a signal, but not | |
| 927 which one. Since only SIGABRT, SIGFPE and SIGINT do anything, we | |
| 928 report SIGABRT. */ | |
| 929 if (termstat == 3) | |
| 930 *status = SIGABRT; | |
| 931 else | |
| 932 *status = (termstat & 0xff) << 8; | |
| 933 | |
| 934 return 0; | |
| 935 } | |
| 936 | |
| 937 /* Create a pipe. */ | |
| 938 | |
| 939 static int | |
| 940 pex_win32_pipe (struct pex_obj *obj ATTRIBUTE_UNUSED, int *p, | |
| 941 int binary) | |
| 942 { | |
|
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943 return _pipe (p, 256, (binary ? _O_BINARY : _O_TEXT) | _O_NOINHERIT); |
| 0 | 944 } |
| 945 | |
| 946 /* Get a FILE pointer to read from a file descriptor. */ | |
| 947 | |
| 948 static FILE * | |
| 949 pex_win32_fdopenr (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, | |
| 950 int binary) | |
| 951 { | |
|
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952 HANDLE h = (HANDLE) _get_osfhandle (fd); |
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953 if (h == INVALID_HANDLE_VALUE) |
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954 return NULL; |
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955 if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) |
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956 return NULL; |
| 0 | 957 return fdopen (fd, binary ? "rb" : "r"); |
| 958 } | |
| 959 | |
| 960 static FILE * | |
| 961 pex_win32_fdopenw (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, | |
| 962 int binary) | |
| 963 { | |
| 964 HANDLE h = (HANDLE) _get_osfhandle (fd); | |
| 965 if (h == INVALID_HANDLE_VALUE) | |
| 966 return NULL; | |
| 967 if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) | |
| 968 return NULL; | |
| 969 return fdopen (fd, binary ? "wb" : "w"); | |
| 970 } | |
| 971 | |
| 972 #ifdef MAIN | |
| 973 #include <stdio.h> | |
| 974 | |
| 975 int | |
| 976 main (int argc ATTRIBUTE_UNUSED, char **argv) | |
| 977 { | |
| 978 char const *errmsg; | |
| 979 int err; | |
| 980 argv++; | |
| 981 printf ("%ld\n", (long) pex_win32_exec_child (NULL, PEX_SEARCH, argv[0], argv, NULL, 0, 0, 1, 2, &errmsg, &err)); | |
| 982 exit (0); | |
| 983 } | |
| 984 #endif |