Mercurial > hg > CbC > CbC_gcc
annotate libiberty/pex-win32.c @ 55:77e2b8dfacca gcc-4.4.5
update it from 4.4.3 to 4.5.0
| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Fri, 12 Feb 2010 23:39:51 +0900 |
| parents | a06113de4d67 |
| children | 04ced10e8804 |
| 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. | |
| 3 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006 | |
| 4 Free Software Foundation, Inc. | |
| 5 | |
| 6 This file is part of the libiberty library. | |
| 7 Libiberty is free software; you can redistribute it and/or | |
| 8 modify it under the terms of the GNU Library General Public | |
| 9 License as published by the Free Software Foundation; either | |
| 10 version 2 of the License, or (at your option) any later version. | |
| 11 | |
| 12 Libiberty 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 GNU | |
| 15 Library General Public License for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU Library General Public | |
| 18 License along with libiberty; see the file COPYING.LIB. If not, | |
| 19 write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, | |
| 20 Boston, MA 02110-1301, USA. */ | |
| 21 | |
| 22 #include "pex-common.h" | |
| 23 | |
| 24 #include <windows.h> | |
| 25 | |
| 26 #ifdef HAVE_STDLIB_H | |
| 27 #include <stdlib.h> | |
| 28 #endif | |
| 29 #ifdef HAVE_STRING_H | |
| 30 #include <string.h> | |
| 31 #endif | |
| 32 #ifdef HAVE_UNISTD_H | |
| 33 #include <unistd.h> | |
| 34 #endif | |
| 35 #ifdef HAVE_SYS_WAIT_H | |
| 36 #include <sys/wait.h> | |
| 37 #endif | |
| 38 | |
| 39 #include <assert.h> | |
| 40 #include <process.h> | |
| 41 #include <io.h> | |
| 42 #include <fcntl.h> | |
| 43 #include <signal.h> | |
| 44 #include <sys/stat.h> | |
| 45 #include <errno.h> | |
| 46 #include <ctype.h> | |
| 47 | |
| 48 /* mingw32 headers may not define the following. */ | |
| 49 | |
| 50 #ifndef _P_WAIT | |
| 51 # define _P_WAIT 0 | |
| 52 # define _P_NOWAIT 1 | |
| 53 # define _P_OVERLAY 2 | |
| 54 # define _P_NOWAITO 3 | |
| 55 # define _P_DETACH 4 | |
| 56 | |
| 57 # define WAIT_CHILD 0 | |
| 58 # define WAIT_GRANDCHILD 1 | |
| 59 #endif | |
| 60 | |
| 61 #define MINGW_NAME "Minimalist GNU for Windows" | |
| 62 #define MINGW_NAME_LEN (sizeof(MINGW_NAME) - 1) | |
| 63 | |
| 64 extern char *stpcpy (char *dst, const char *src); | |
| 65 | |
| 66 /* Ensure that the executable pathname uses Win32 backslashes. This | |
| 67 is not necessary on NT, but on W9x, forward slashes causes | |
| 68 failure of spawn* and exec* functions (and probably any function | |
| 69 that calls CreateProcess) *iff* the executable pathname (argv[0]) | |
| 70 is a quoted string. And quoting is necessary in case a pathname | |
| 71 contains embedded white space. You can't win. */ | |
| 72 static void | |
| 73 backslashify (char *s) | |
| 74 { | |
| 75 while ((s = strchr (s, '/')) != NULL) | |
| 76 *s = '\\'; | |
| 77 return; | |
| 78 } | |
| 79 | |
| 80 static int pex_win32_open_read (struct pex_obj *, const char *, int); | |
| 81 static int pex_win32_open_write (struct pex_obj *, const char *, int); | |
| 82 static pid_t pex_win32_exec_child (struct pex_obj *, int, const char *, | |
| 83 char * const *, char * const *, | |
| 84 int, int, int, int, | |
| 85 const char **, int *); | |
| 86 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
|
87 static pid_t pex_win32_wait (struct pex_obj *, pid_t, int *, |
| 0 | 88 struct pex_time *, int, const char **, int *); |
| 89 static int pex_win32_pipe (struct pex_obj *, int *, int); | |
| 90 static FILE *pex_win32_fdopenr (struct pex_obj *, int, int); | |
| 91 static FILE *pex_win32_fdopenw (struct pex_obj *, int, int); | |
| 92 | |
| 93 /* The list of functions we pass to the common routines. */ | |
| 94 | |
| 95 const struct pex_funcs funcs = | |
| 96 { | |
| 97 pex_win32_open_read, | |
| 98 pex_win32_open_write, | |
| 99 pex_win32_exec_child, | |
| 100 pex_win32_close, | |
| 101 pex_win32_wait, | |
| 102 pex_win32_pipe, | |
| 103 pex_win32_fdopenr, | |
| 104 pex_win32_fdopenw, | |
| 105 NULL /* cleanup */ | |
| 106 }; | |
| 107 | |
| 108 /* Return a newly initialized pex_obj structure. */ | |
| 109 | |
| 110 struct pex_obj * | |
| 111 pex_init (int flags, const char *pname, const char *tempbase) | |
| 112 { | |
| 113 return pex_init_common (flags, pname, tempbase, &funcs); | |
| 114 } | |
| 115 | |
| 116 /* Open a file for reading. */ | |
| 117 | |
| 118 static int | |
| 119 pex_win32_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name, | |
| 120 int binary) | |
| 121 { | |
| 122 return _open (name, _O_RDONLY | (binary ? _O_BINARY : _O_TEXT)); | |
| 123 } | |
| 124 | |
| 125 /* Open a file for writing. */ | |
| 126 | |
| 127 static int | |
| 128 pex_win32_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name, | |
| 129 int binary) | |
| 130 { | |
| 131 /* Note that we can't use O_EXCL here because gcc may have already | |
| 132 created the temporary file via make_temp_file. */ | |
| 133 return _open (name, | |
| 134 (_O_WRONLY | _O_CREAT | _O_TRUNC | |
| 135 | (binary ? _O_BINARY : _O_TEXT)), | |
| 136 _S_IREAD | _S_IWRITE); | |
| 137 } | |
| 138 | |
| 139 /* Close a file. */ | |
| 140 | |
| 141 static int | |
| 142 pex_win32_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd) | |
| 143 { | |
| 144 return _close (fd); | |
| 145 } | |
| 146 | |
| 147 #ifdef USE_MINGW_MSYS | |
| 148 static const char *mingw_keys[] = {"SOFTWARE", "Microsoft", "Windows", "CurrentVersion", "Uninstall", NULL}; | |
| 149 | |
| 150 /* Tack the executable on the end of a (possibly slash terminated) buffer | |
| 151 and convert everything to \. */ | |
| 152 static const char * | |
| 153 tack_on_executable (char *buf, const char *executable) | |
| 154 { | |
| 155 char *p = strchr (buf, '\0'); | |
| 156 if (p > buf && (p[-1] == '\\' || p[-1] == '/')) | |
| 157 p[-1] = '\0'; | |
| 158 backslashify (strcat (buf, executable)); | |
| 159 return buf; | |
| 160 } | |
| 161 | |
| 162 /* Walk down a registry hierarchy until the end. Return the key. */ | |
| 163 static HKEY | |
| 164 openkey (HKEY hStart, const char *keys[]) | |
| 165 { | |
| 166 HKEY hKey, hTmp; | |
| 167 for (hKey = hStart; *keys; keys++) | |
| 168 { | |
| 169 LONG res; | |
| 170 hTmp = hKey; | |
| 171 res = RegOpenKey (hTmp, *keys, &hKey); | |
| 172 | |
| 173 if (hTmp != HKEY_LOCAL_MACHINE) | |
| 174 RegCloseKey (hTmp); | |
| 175 | |
| 176 if (res != ERROR_SUCCESS) | |
| 177 return NULL; | |
| 178 } | |
| 179 return hKey; | |
| 180 } | |
| 181 | |
| 182 /* Return the "mingw root" as derived from the mingw uninstall information. */ | |
| 183 static const char * | |
| 184 mingw_rootify (const char *executable) | |
| 185 { | |
| 186 HKEY hKey, hTmp; | |
| 187 DWORD maxlen; | |
| 188 char *namebuf, *foundbuf; | |
| 189 DWORD i; | |
| 190 LONG res; | |
| 191 | |
| 192 /* Open the uninstall "directory". */ | |
| 193 hKey = openkey (HKEY_LOCAL_MACHINE, mingw_keys); | |
| 194 | |
| 195 /* Not found. */ | |
| 196 if (!hKey) | |
| 197 return executable; | |
| 198 | |
| 199 /* Need to enumerate all of the keys here looking for one the most recent | |
| 200 one for MinGW. */ | |
| 201 if (RegQueryInfoKey (hKey, NULL, NULL, NULL, NULL, &maxlen, NULL, NULL, | |
| 202 NULL, NULL, NULL, NULL) != ERROR_SUCCESS) | |
| 203 { | |
| 204 RegCloseKey (hKey); | |
| 205 return executable; | |
| 206 } | |
| 207 namebuf = XNEWVEC (char, ++maxlen); | |
| 208 foundbuf = XNEWVEC (char, maxlen); | |
| 209 foundbuf[0] = '\0'; | |
| 210 if (!namebuf || !foundbuf) | |
| 211 { | |
| 212 RegCloseKey (hKey); | |
| 213 if (namebuf) | |
| 214 free (namebuf); | |
| 215 if (foundbuf) | |
| 216 free (foundbuf); | |
| 217 return executable; | |
| 218 } | |
| 219 | |
| 220 /* Look through all of the keys for one that begins with Minimal GNU... | |
| 221 Try to get the latest version by doing a string compare although that | |
| 222 string never really works with version number sorting. */ | |
| 223 for (i = 0; RegEnumKey (hKey, i, namebuf, maxlen) == ERROR_SUCCESS; i++) | |
| 224 { | |
| 225 int match = strcasecmp (namebuf, MINGW_NAME); | |
| 226 if (match < 0) | |
| 227 continue; | |
| 228 if (match > 0 && strncasecmp (namebuf, MINGW_NAME, MINGW_NAME_LEN) > 0) | |
| 229 continue; | |
| 230 if (strcasecmp (namebuf, foundbuf) > 0) | |
| 231 strcpy (foundbuf, namebuf); | |
| 232 } | |
| 233 free (namebuf); | |
| 234 | |
| 235 /* If foundbuf is empty, we didn't find anything. Punt. */ | |
| 236 if (!foundbuf[0]) | |
| 237 { | |
| 238 free (foundbuf); | |
| 239 RegCloseKey (hKey); | |
| 240 return executable; | |
| 241 } | |
| 242 | |
| 243 /* Open the key that we wanted */ | |
| 244 res = RegOpenKey (hKey, foundbuf, &hTmp); | |
| 245 RegCloseKey (hKey); | |
| 246 free (foundbuf); | |
| 247 | |
| 248 /* Don't know why this would fail, but you gotta check */ | |
| 249 if (res != ERROR_SUCCESS) | |
| 250 return executable; | |
| 251 | |
| 252 maxlen = 0; | |
| 253 /* Get the length of the value pointed to by InstallLocation */ | |
| 254 if (RegQueryValueEx (hTmp, "InstallLocation", 0, NULL, NULL, | |
| 255 &maxlen) != ERROR_SUCCESS || maxlen == 0) | |
| 256 { | |
| 257 RegCloseKey (hTmp); | |
| 258 return executable; | |
| 259 } | |
| 260 | |
| 261 /* Allocate space for the install location */ | |
| 262 foundbuf = XNEWVEC (char, maxlen + strlen (executable)); | |
| 263 if (!foundbuf) | |
| 264 { | |
| 265 free (foundbuf); | |
| 266 RegCloseKey (hTmp); | |
| 267 } | |
| 268 | |
| 269 /* Read the install location into the buffer */ | |
| 270 res = RegQueryValueEx (hTmp, "InstallLocation", 0, NULL, (LPBYTE) foundbuf, | |
| 271 &maxlen); | |
| 272 RegCloseKey (hTmp); | |
| 273 if (res != ERROR_SUCCESS) | |
| 274 { | |
| 275 free (foundbuf); | |
| 276 return executable; | |
| 277 } | |
| 278 | |
| 279 /* Concatenate the install location and the executable, turn all slashes | |
| 280 to backslashes, and return that. */ | |
| 281 return tack_on_executable (foundbuf, executable); | |
| 282 } | |
| 283 | |
| 284 /* Read the install location of msys from it's installation file and | |
| 285 rootify the executable based on that. */ | |
| 286 static const char * | |
| 287 msys_rootify (const char *executable) | |
| 288 { | |
| 289 size_t bufsize = 64; | |
| 290 size_t execlen = strlen (executable) + 1; | |
| 291 char *buf; | |
| 292 DWORD res = 0; | |
| 293 for (;;) | |
| 294 { | |
| 295 buf = XNEWVEC (char, bufsize + execlen); | |
| 296 if (!buf) | |
| 297 break; | |
| 298 res = GetPrivateProfileString ("InstallSettings", "InstallPath", NULL, | |
| 299 buf, bufsize, "msys.ini"); | |
| 300 if (!res) | |
| 301 break; | |
| 302 if (strlen (buf) < bufsize) | |
| 303 break; | |
| 304 res = 0; | |
| 305 free (buf); | |
| 306 bufsize *= 2; | |
| 307 if (bufsize > 65536) | |
| 308 { | |
| 309 buf = NULL; | |
| 310 break; | |
| 311 } | |
| 312 } | |
| 313 | |
| 314 if (res) | |
| 315 return tack_on_executable (buf, executable); | |
| 316 | |
| 317 /* failed */ | |
| 318 if (buf) | |
| 319 free (buf); | |
| 320 return executable; | |
| 321 } | |
| 322 #endif | |
| 323 | |
| 324 /* Return the number of arguments in an argv array, not including the null | |
| 325 terminating argument. */ | |
| 326 | |
| 327 static int | |
| 328 argv_to_argc (char *const *argv) | |
| 329 { | |
| 330 char *const *i = argv; | |
| 331 while (*i) | |
| 332 i++; | |
| 333 return i - argv; | |
| 334 } | |
| 335 | |
| 336 /* Return a Windows command-line from ARGV. It is the caller's | |
| 337 responsibility to free the string returned. */ | |
| 338 | |
| 339 static char * | |
| 340 argv_to_cmdline (char *const *argv) | |
| 341 { | |
| 342 char *cmdline; | |
| 343 char *p; | |
| 344 size_t cmdline_len; | |
| 345 int i, j, k; | |
| 346 | |
| 347 cmdline_len = 0; | |
| 348 for (i = 0; argv[i]; i++) | |
| 349 { | |
| 350 /* We quote every last argument. This simplifies the problem; | |
| 351 we need only escape embedded double-quotes and immediately | |
| 352 preceeding backslash characters. A sequence of backslach characters | |
| 353 that is not follwed by a double quote character will not be | |
| 354 escaped. */ | |
| 355 for (j = 0; argv[i][j]; j++) | |
| 356 { | |
| 357 if (argv[i][j] == '"') | |
| 358 { | |
| 359 /* Escape preceeding backslashes. */ | |
| 360 for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
| 361 cmdline_len++; | |
| 362 /* Escape the qote character. */ | |
| 363 cmdline_len++; | |
| 364 } | |
| 365 } | |
| 366 /* Trailing backslashes also need to be escaped because they will be | |
| 367 followed by the terminating quote. */ | |
| 368 for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
| 369 cmdline_len++; | |
| 370 cmdline_len += j; | |
| 371 cmdline_len += 3; /* for leading and trailing quotes and space */ | |
| 372 } | |
| 373 cmdline = XNEWVEC (char, cmdline_len); | |
| 374 p = cmdline; | |
| 375 for (i = 0; argv[i]; i++) | |
| 376 { | |
| 377 *p++ = '"'; | |
| 378 for (j = 0; argv[i][j]; j++) | |
| 379 { | |
| 380 if (argv[i][j] == '"') | |
| 381 { | |
| 382 for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
| 383 *p++ = '\\'; | |
| 384 *p++ = '\\'; | |
| 385 } | |
| 386 *p++ = argv[i][j]; | |
| 387 } | |
| 388 for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
| 389 *p++ = '\\'; | |
| 390 *p++ = '"'; | |
| 391 *p++ = ' '; | |
| 392 } | |
| 393 p[-1] = '\0'; | |
| 394 return cmdline; | |
| 395 } | |
| 396 | |
| 397 /* We'll try the passed filename with all the known standard | |
| 398 extensions, and then without extension. We try no extension | |
| 399 last so that we don't try to run some random extension-less | |
| 400 file that might be hanging around. We try both extension | |
| 401 and no extension so that we don't need any fancy logic | |
| 402 to determine if a file has extension. */ | |
| 403 static const char *const | |
| 404 std_suffixes[] = { | |
| 405 ".com", | |
| 406 ".exe", | |
| 407 ".bat", | |
| 408 ".cmd", | |
| 409 "", | |
| 410 0 | |
| 411 }; | |
| 412 | |
| 413 /* Returns the full path to PROGRAM. If SEARCH is true, look for | |
| 414 PROGRAM in each directory in PATH. */ | |
| 415 | |
| 416 static char * | |
| 417 find_executable (const char *program, BOOL search) | |
| 418 { | |
| 419 char *full_executable; | |
| 420 char *e; | |
| 421 size_t fe_len; | |
| 422 const char *path = 0; | |
| 423 const char *const *ext; | |
| 424 const char *p, *q; | |
| 425 size_t proglen = strlen (program); | |
| 426 int has_slash = (strchr (program, '/') || strchr (program, '\\')); | |
| 427 HANDLE h; | |
| 428 | |
| 429 if (has_slash) | |
| 430 search = FALSE; | |
| 431 | |
| 432 if (search) | |
| 433 path = getenv ("PATH"); | |
| 434 if (!path) | |
| 435 path = ""; | |
| 436 | |
| 437 fe_len = 0; | |
| 438 for (p = path; *p; p = q) | |
| 439 { | |
| 440 q = p; | |
| 441 while (*q != ';' && *q != '\0') | |
| 442 q++; | |
| 443 if ((size_t)(q - p) > fe_len) | |
| 444 fe_len = q - p; | |
| 445 if (*q == ';') | |
| 446 q++; | |
| 447 } | |
| 448 fe_len = fe_len + 1 + proglen + 5 /* space for extension */; | |
| 449 full_executable = XNEWVEC (char, fe_len); | |
| 450 | |
| 451 p = path; | |
| 452 do | |
| 453 { | |
| 454 q = p; | |
| 455 while (*q != ';' && *q != '\0') | |
| 456 q++; | |
| 457 | |
| 458 e = full_executable; | |
| 459 memcpy (e, p, q - p); | |
| 460 e += (q - p); | |
| 461 if (q - p) | |
| 462 *e++ = '\\'; | |
| 463 strcpy (e, program); | |
| 464 | |
| 465 if (*q == ';') | |
| 466 q++; | |
| 467 | |
| 468 for (e = full_executable; *e; e++) | |
| 469 if (*e == '/') | |
| 470 *e = '\\'; | |
| 471 | |
| 472 /* At this point, e points to the terminating NUL character for | |
| 473 full_executable. */ | |
| 474 for (ext = std_suffixes; *ext; ext++) | |
| 475 { | |
| 476 /* Remove any current extension. */ | |
| 477 *e = '\0'; | |
| 478 /* Add the new one. */ | |
| 479 strcat (full_executable, *ext); | |
| 480 | |
| 481 /* Attempt to open this file. */ | |
| 482 h = CreateFile (full_executable, GENERIC_READ, | |
| 483 FILE_SHARE_READ | FILE_SHARE_WRITE, | |
| 484 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); | |
| 485 if (h != INVALID_HANDLE_VALUE) | |
| 486 goto found; | |
| 487 } | |
| 488 p = q; | |
| 489 } | |
| 490 while (*p); | |
| 491 free (full_executable); | |
| 492 return 0; | |
| 493 | |
| 494 found: | |
| 495 CloseHandle (h); | |
| 496 return full_executable; | |
| 497 } | |
| 498 | |
| 499 /* Low-level process creation function and helper. */ | |
| 500 | |
| 501 static int | |
| 502 env_compare (const void *a_ptr, const void *b_ptr) | |
| 503 { | |
| 504 const char *a; | |
| 505 const char *b; | |
| 506 unsigned char c1; | |
| 507 unsigned char c2; | |
| 508 | |
| 509 a = *(const char **) a_ptr; | |
| 510 b = *(const char **) b_ptr; | |
| 511 | |
| 512 /* a and b will be of the form: VAR=VALUE | |
| 513 We compare only the variable name part here using a case-insensitive | |
| 514 comparison algorithm. It might appear that in fact strcasecmp () can | |
| 515 take the place of this whole function, and indeed it could, save for | |
| 516 the fact that it would fail in cases such as comparing A1=foo and | |
| 517 A=bar (because 1 is less than = in the ASCII character set). | |
| 518 (Environment variables containing no numbers would work in such a | |
| 519 scenario.) */ | |
| 520 | |
| 521 do | |
| 522 { | |
| 523 c1 = (unsigned char) tolower (*a++); | |
| 524 c2 = (unsigned char) tolower (*b++); | |
| 525 | |
| 526 if (c1 == '=') | |
| 527 c1 = '\0'; | |
| 528 | |
| 529 if (c2 == '=') | |
| 530 c2 = '\0'; | |
| 531 } | |
| 532 while (c1 == c2 && c1 != '\0'); | |
| 533 | |
| 534 return c1 - c2; | |
| 535 } | |
| 536 | |
| 537 /* Execute a Windows executable as a child process. This will fail if the | |
| 538 * target is not actually an executable, such as if it is a shell script. */ | |
| 539 | |
| 540 static pid_t | |
| 541 win32_spawn (const char *executable, | |
| 542 BOOL search, | |
| 543 char *const *argv, | |
| 544 char *const *env, /* array of strings of the form: VAR=VALUE */ | |
| 545 DWORD dwCreationFlags, | |
| 546 LPSTARTUPINFO si, | |
| 547 LPPROCESS_INFORMATION pi) | |
| 548 { | |
| 549 char *full_executable; | |
| 550 char *cmdline; | |
| 551 char **env_copy; | |
| 552 char *env_block = NULL; | |
| 553 | |
| 554 full_executable = NULL; | |
| 555 cmdline = NULL; | |
| 556 | |
| 557 if (env) | |
| 558 { | |
| 559 int env_size; | |
| 560 | |
| 561 /* Count the number of environment bindings supplied. */ | |
| 562 for (env_size = 0; env[env_size]; env_size++) | |
| 563 continue; | |
| 564 | |
| 565 /* Assemble an environment block, if required. This consists of | |
| 566 VAR=VALUE strings juxtaposed (with one null character between each | |
| 567 pair) and an additional null at the end. */ | |
| 568 if (env_size > 0) | |
| 569 { | |
| 570 int var; | |
| 571 int total_size = 1; /* 1 is for the final null. */ | |
| 572 char *bufptr; | |
| 573 | |
| 574 /* Windows needs the members of the block to be sorted by variable | |
| 575 name. */ | |
| 576 env_copy = (char **) alloca (sizeof (char *) * env_size); | |
| 577 memcpy (env_copy, env, sizeof (char *) * env_size); | |
| 578 qsort (env_copy, env_size, sizeof (char *), env_compare); | |
| 579 | |
| 580 for (var = 0; var < env_size; var++) | |
| 581 total_size += strlen (env[var]) + 1; | |
| 582 | |
| 583 env_block = XNEWVEC (char, total_size); | |
| 584 bufptr = env_block; | |
| 585 for (var = 0; var < env_size; var++) | |
| 586 bufptr = stpcpy (bufptr, env_copy[var]) + 1; | |
| 587 | |
| 588 *bufptr = '\0'; | |
| 589 } | |
| 590 } | |
| 591 | |
| 592 full_executable = find_executable (executable, search); | |
| 593 if (!full_executable) | |
| 594 goto error; | |
| 595 cmdline = argv_to_cmdline (argv); | |
| 596 if (!cmdline) | |
| 597 goto error; | |
| 598 | |
| 599 /* Create the child process. */ | |
| 600 if (!CreateProcess (full_executable, cmdline, | |
| 601 /*lpProcessAttributes=*/NULL, | |
| 602 /*lpThreadAttributes=*/NULL, | |
| 603 /*bInheritHandles=*/TRUE, | |
| 604 dwCreationFlags, | |
| 605 (LPVOID) env_block, | |
| 606 /*lpCurrentDirectory=*/NULL, | |
| 607 si, | |
| 608 pi)) | |
| 609 { | |
| 610 if (env_block) | |
| 611 free (env_block); | |
| 612 | |
| 613 free (full_executable); | |
| 614 | |
| 615 return (pid_t) -1; | |
| 616 } | |
| 617 | |
| 618 /* Clean up. */ | |
| 619 CloseHandle (pi->hThread); | |
| 620 free (full_executable); | |
| 621 if (env_block) | |
| 622 free (env_block); | |
| 623 | |
| 624 return (pid_t) pi->hProcess; | |
| 625 | |
| 626 error: | |
| 627 if (env_block) | |
| 628 free (env_block); | |
| 629 if (cmdline) | |
| 630 free (cmdline); | |
| 631 if (full_executable) | |
| 632 free (full_executable); | |
| 633 | |
| 634 return (pid_t) -1; | |
| 635 } | |
| 636 | |
| 637 /* Spawn a script. This simulates the Unix script execution mechanism. | |
| 638 This function is called as a fallback if win32_spawn fails. */ | |
| 639 | |
| 640 static pid_t | |
| 641 spawn_script (const char *executable, char *const *argv, | |
| 642 char* const *env, | |
| 643 DWORD dwCreationFlags, | |
| 644 LPSTARTUPINFO si, | |
| 645 LPPROCESS_INFORMATION pi) | |
| 646 { | |
| 647 pid_t pid = (pid_t) -1; | |
| 648 int save_errno = errno; | |
| 649 int fd = _open (executable, _O_RDONLY); | |
| 650 | |
| 651 /* Try to open script, check header format, extract interpreter path, | |
| 652 and spawn script using that interpretter. */ | |
| 653 if (fd >= 0) | |
| 654 { | |
| 655 char buf[MAX_PATH + 5]; | |
| 656 int len = _read (fd, buf, sizeof (buf) - 1); | |
| 657 _close (fd); | |
| 658 if (len > 3) | |
| 659 { | |
| 660 char *eol; | |
| 661 buf[len] = '\0'; | |
| 662 eol = strchr (buf, '\n'); | |
| 663 if (eol && strncmp (buf, "#!", 2) == 0) | |
| 664 { | |
| 665 | |
| 666 /* Header format is OK. */ | |
| 667 char *executable1; | |
| 668 int new_argc; | |
| 669 const char **avhere; | |
| 670 | |
| 671 /* Extract interpreter path. */ | |
| 672 do | |
| 673 *eol = '\0'; | |
| 674 while (*--eol == '\r' || *eol == ' ' || *eol == '\t'); | |
| 675 for (executable1 = buf + 2; *executable1 == ' ' || *executable1 == '\t'; executable1++) | |
| 676 continue; | |
| 677 backslashify (executable1); | |
| 678 | |
| 679 /* Duplicate argv, prepending the interpreter path. */ | |
| 680 new_argc = argv_to_argc (argv) + 1; | |
| 681 avhere = XNEWVEC (const char *, new_argc + 1); | |
| 682 *avhere = executable1; | |
| 683 memcpy (avhere + 1, argv, new_argc * sizeof(*argv)); | |
| 684 argv = (char *const *)avhere; | |
| 685 | |
| 686 /* Spawn the child. */ | |
| 687 #ifndef USE_MINGW_MSYS | |
| 688 executable = strrchr (executable1, '\\') + 1; | |
| 689 if (!executable) | |
| 690 executable = executable1; | |
| 691 pid = win32_spawn (executable, TRUE, argv, env, | |
| 692 dwCreationFlags, si, pi); | |
| 693 #else | |
| 694 if (strchr (executable1, '\\') == NULL) | |
| 695 pid = win32_spawn (executable1, TRUE, argv, env, | |
| 696 dwCreationFlags, si, pi); | |
| 697 else if (executable1[0] != '\\') | |
| 698 pid = win32_spawn (executable1, FALSE, argv, env, | |
| 699 dwCreationFlags, si, pi); | |
| 700 else | |
| 701 { | |
| 702 const char *newex = mingw_rootify (executable1); | |
| 703 *avhere = newex; | |
| 704 pid = win32_spawn (newex, FALSE, argv, env, | |
| 705 dwCreationFlags, si, pi); | |
| 706 if (executable1 != newex) | |
| 707 free ((char *) newex); | |
|
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708 if (pid == (pid_t) -1) |
| 0 | 709 { |
| 710 newex = msys_rootify (executable1); | |
| 711 if (newex != executable1) | |
| 712 { | |
| 713 *avhere = newex; | |
| 714 pid = win32_spawn (newex, FALSE, argv, env, | |
| 715 dwCreationFlags, si, pi); | |
| 716 free ((char *) newex); | |
| 717 } | |
| 718 } | |
| 719 } | |
| 720 #endif | |
| 721 free (avhere); | |
| 722 } | |
| 723 } | |
| 724 } | |
|
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725 if (pid == (pid_t) -1) |
| 0 | 726 errno = save_errno; |
| 727 return pid; | |
| 728 } | |
| 729 | |
| 730 /* Execute a child. */ | |
| 731 | |
| 732 static pid_t | |
| 733 pex_win32_exec_child (struct pex_obj *obj ATTRIBUTE_UNUSED, int flags, | |
| 734 const char *executable, char * const * argv, | |
| 735 char* const* env, | |
| 736 int in, int out, int errdes, | |
| 737 int toclose ATTRIBUTE_UNUSED, | |
| 738 const char **errmsg, | |
| 739 int *err) | |
| 740 { | |
| 741 pid_t pid; | |
| 742 HANDLE stdin_handle; | |
| 743 HANDLE stdout_handle; | |
| 744 HANDLE stderr_handle; | |
| 745 DWORD dwCreationFlags; | |
| 746 OSVERSIONINFO version_info; | |
| 747 STARTUPINFO si; | |
| 748 PROCESS_INFORMATION pi; | |
|
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749 int orig_out, orig_in, orig_err; |
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750 BOOL separate_stderr = !(flags & PEX_STDERR_TO_STDOUT); |
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751 |
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752 /* Ensure we have inheritable descriptors to pass to the child, and close the |
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753 original descriptors. */ |
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754 orig_in = in; |
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755 in = _dup (orig_in); |
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756 if (orig_in != STDIN_FILENO) |
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757 _close (orig_in); |
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758 |
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759 orig_out = out; |
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760 out = _dup (orig_out); |
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761 if (orig_out != STDOUT_FILENO) |
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762 _close (orig_out); |
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763 |
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764 if (separate_stderr) |
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765 { |
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766 orig_err = errdes; |
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767 errdes = _dup (orig_err); |
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768 if (orig_err != STDERR_FILENO) |
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769 _close (orig_err); |
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770 } |
| 0 | 771 |
| 772 stdin_handle = INVALID_HANDLE_VALUE; | |
| 773 stdout_handle = INVALID_HANDLE_VALUE; | |
| 774 stderr_handle = INVALID_HANDLE_VALUE; | |
| 775 | |
| 776 stdin_handle = (HANDLE) _get_osfhandle (in); | |
| 777 stdout_handle = (HANDLE) _get_osfhandle (out); | |
|
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778 if (separate_stderr) |
| 0 | 779 stderr_handle = (HANDLE) _get_osfhandle (errdes); |
| 780 else | |
| 781 stderr_handle = stdout_handle; | |
| 782 | |
| 783 /* Determine the version of Windows we are running on. */ | |
| 784 version_info.dwOSVersionInfoSize = sizeof (version_info); | |
| 785 GetVersionEx (&version_info); | |
| 786 if (version_info.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) | |
| 787 /* On Windows 95/98/ME the CREATE_NO_WINDOW flag is not | |
| 788 supported, so we cannot avoid creating a console window. */ | |
| 789 dwCreationFlags = 0; | |
| 790 else | |
| 791 { | |
| 792 HANDLE conout_handle; | |
| 793 | |
| 794 /* Determine whether or not we have an associated console. */ | |
| 795 conout_handle = CreateFile("CONOUT$", | |
| 796 GENERIC_WRITE, | |
| 797 FILE_SHARE_WRITE, | |
| 798 /*lpSecurityAttributes=*/NULL, | |
| 799 OPEN_EXISTING, | |
| 800 FILE_ATTRIBUTE_NORMAL, | |
| 801 /*hTemplateFile=*/NULL); | |
| 802 if (conout_handle == INVALID_HANDLE_VALUE) | |
| 803 /* There is no console associated with this process. Since | |
| 804 the child is a console process, the OS would normally | |
| 805 create a new console Window for the child. Since we'll be | |
| 806 redirecting the child's standard streams, we do not need | |
| 807 the console window. */ | |
| 808 dwCreationFlags = CREATE_NO_WINDOW; | |
| 809 else | |
| 810 { | |
| 811 /* There is a console associated with the process, so the OS | |
| 812 will not create a new console. And, if we use | |
| 813 CREATE_NO_WINDOW in this situation, the child will have | |
| 814 no associated console. Therefore, if the child's | |
| 815 standard streams are connected to the console, the output | |
| 816 will be discarded. */ | |
| 817 CloseHandle(conout_handle); | |
| 818 dwCreationFlags = 0; | |
| 819 } | |
| 820 } | |
| 821 | |
| 822 /* Since the child will be a console process, it will, by default, | |
| 823 connect standard input/output to its console. However, we want | |
| 824 the child to use the handles specifically designated above. In | |
| 825 addition, if there is no console (such as when we are running in | |
| 826 a Cygwin X window), then we must redirect the child's | |
| 827 input/output, as there is no console for the child to use. */ | |
| 828 memset (&si, 0, sizeof (si)); | |
| 829 si.cb = sizeof (si); | |
| 830 si.dwFlags = STARTF_USESTDHANDLES; | |
| 831 si.hStdInput = stdin_handle; | |
| 832 si.hStdOutput = stdout_handle; | |
| 833 si.hStdError = stderr_handle; | |
| 834 | |
| 835 /* Create the child process. */ | |
| 836 pid = win32_spawn (executable, (flags & PEX_SEARCH) != 0, | |
| 837 argv, env, dwCreationFlags, &si, &pi); | |
| 838 if (pid == (pid_t) -1) | |
| 839 pid = spawn_script (executable, argv, env, dwCreationFlags, | |
| 840 &si, &pi); | |
| 841 if (pid == (pid_t) -1) | |
| 842 { | |
| 843 *err = ENOENT; | |
| 844 *errmsg = "CreateProcess"; | |
| 845 } | |
| 846 | |
|
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847 /* Close the standard input, standard output and standard error handles |
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848 in the parent. */ |
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849 |
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850 _close (in); |
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851 _close (out); |
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852 if (separate_stderr) |
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853 _close (errdes); |
| 0 | 854 |
| 855 return pid; | |
| 856 } | |
| 857 | |
| 858 /* Wait for a child process to complete. MS CRTDLL doesn't return | |
| 859 enough information in status to decide if the child exited due to a | |
| 860 signal or not, rather it simply returns an integer with the exit | |
| 861 code of the child; eg., if the child exited with an abort() call | |
| 862 and didn't have a handler for SIGABRT, it simply returns with | |
| 863 status == 3. We fix the status code to conform to the usual WIF* | |
| 864 macros. Note that WIFSIGNALED will never be true under CRTDLL. */ | |
| 865 | |
|
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866 static pid_t |
| 0 | 867 pex_win32_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, |
| 868 int *status, struct pex_time *time, int done ATTRIBUTE_UNUSED, | |
| 869 const char **errmsg, int *err) | |
| 870 { | |
| 871 DWORD termstat; | |
| 872 HANDLE h; | |
| 873 | |
| 874 if (time != NULL) | |
| 875 memset (time, 0, sizeof *time); | |
| 876 | |
| 877 h = (HANDLE) pid; | |
| 878 | |
| 879 /* FIXME: If done is non-zero, we should probably try to kill the | |
| 880 process. */ | |
| 881 if (WaitForSingleObject (h, INFINITE) != WAIT_OBJECT_0) | |
| 882 { | |
| 883 CloseHandle (h); | |
| 884 *err = ECHILD; | |
| 885 *errmsg = "WaitForSingleObject"; | |
| 886 return -1; | |
| 887 } | |
| 888 | |
| 889 GetExitCodeProcess (h, &termstat); | |
| 890 CloseHandle (h); | |
| 891 | |
| 892 /* A value of 3 indicates that the child caught a signal, but not | |
| 893 which one. Since only SIGABRT, SIGFPE and SIGINT do anything, we | |
| 894 report SIGABRT. */ | |
| 895 if (termstat == 3) | |
| 896 *status = SIGABRT; | |
| 897 else | |
| 898 *status = (termstat & 0xff) << 8; | |
| 899 | |
| 900 return 0; | |
| 901 } | |
| 902 | |
| 903 /* Create a pipe. */ | |
| 904 | |
| 905 static int | |
| 906 pex_win32_pipe (struct pex_obj *obj ATTRIBUTE_UNUSED, int *p, | |
| 907 int binary) | |
| 908 { | |
|
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909 return _pipe (p, 256, (binary ? _O_BINARY : _O_TEXT) | _O_NOINHERIT); |
| 0 | 910 } |
| 911 | |
| 912 /* Get a FILE pointer to read from a file descriptor. */ | |
| 913 | |
| 914 static FILE * | |
| 915 pex_win32_fdopenr (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, | |
| 916 int binary) | |
| 917 { | |
|
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918 HANDLE h = (HANDLE) _get_osfhandle (fd); |
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919 if (h == INVALID_HANDLE_VALUE) |
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920 return NULL; |
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921 if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) |
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922 return NULL; |
| 0 | 923 return fdopen (fd, binary ? "rb" : "r"); |
| 924 } | |
| 925 | |
| 926 static FILE * | |
| 927 pex_win32_fdopenw (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, | |
| 928 int binary) | |
| 929 { | |
| 930 HANDLE h = (HANDLE) _get_osfhandle (fd); | |
| 931 if (h == INVALID_HANDLE_VALUE) | |
| 932 return NULL; | |
| 933 if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) | |
| 934 return NULL; | |
| 935 return fdopen (fd, binary ? "wb" : "w"); | |
| 936 } | |
| 937 | |
| 938 #ifdef MAIN | |
| 939 #include <stdio.h> | |
| 940 | |
| 941 int | |
| 942 main (int argc ATTRIBUTE_UNUSED, char **argv) | |
| 943 { | |
| 944 char const *errmsg; | |
| 945 int err; | |
| 946 argv++; | |
| 947 printf ("%ld\n", (long) pex_win32_exec_child (NULL, PEX_SEARCH, argv[0], argv, NULL, 0, 0, 1, 2, &errmsg, &err)); | |
| 948 exit (0); | |
| 949 } | |
| 950 #endif |