| 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); |
| 87 | static pid_t pex_win32_wait (struct pex_obj *, pid_t, int *, |
| 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 | free (namebuf); |
| 214 | free (foundbuf); |
| 215 | return executable; |
| 216 | } |
| 217 | |
| 218 | /* Look through all of the keys for one that begins with Minimal GNU... |
| 219 | Try to get the latest version by doing a string compare although that |
| 220 | string never really works with version number sorting. */ |
| 221 | for (i = 0; RegEnumKey (hKey, i, namebuf, maxlen) == ERROR_SUCCESS; i++) |
| 222 | { |
| 223 | int match = strcasecmp (namebuf, MINGW_NAME); |
| 224 | if (match < 0) |
| 225 | continue; |
| 226 | if (match > 0 && strncasecmp (namebuf, MINGW_NAME, MINGW_NAME_LEN) > 0) |
| 227 | continue; |
| 228 | if (strcasecmp (namebuf, foundbuf) > 0) |
| 229 | strcpy (foundbuf, namebuf); |
| 230 | } |
| 231 | free (namebuf); |
| 232 | |
| 233 | /* If foundbuf is empty, we didn't find anything. Punt. */ |
| 234 | if (!foundbuf[0]) |
| 235 | { |
| 236 | free (foundbuf); |
| 237 | RegCloseKey (hKey); |
| 238 | return executable; |
| 239 | } |
| 240 | |
| 241 | /* Open the key that we wanted */ |
| 242 | res = RegOpenKey (hKey, foundbuf, &hTmp); |
| 243 | RegCloseKey (hKey); |
| 244 | free (foundbuf); |
| 245 | |
| 246 | /* Don't know why this would fail, but you gotta check */ |
| 247 | if (res != ERROR_SUCCESS) |
| 248 | return executable; |
| 249 | |
| 250 | maxlen = 0; |
| 251 | /* Get the length of the value pointed to by InstallLocation */ |
| 252 | if (RegQueryValueEx (hTmp, "InstallLocation", 0, NULL, NULL, |
| 253 | &maxlen) != ERROR_SUCCESS || maxlen == 0) |
| 254 | { |
| 255 | RegCloseKey (hTmp); |
| 256 | return executable; |
| 257 | } |
| 258 | |
| 259 | /* Allocate space for the install location */ |
| 260 | foundbuf = XNEWVEC (char, maxlen + strlen (executable)); |
| 261 | if (!foundbuf) |
| 262 | { |
| 263 | free (foundbuf); |
| 264 | RegCloseKey (hTmp); |
| 265 | } |
| 266 | |
| 267 | /* Read the install location into the buffer */ |
| 268 | res = RegQueryValueEx (hTmp, "InstallLocation", 0, NULL, (LPBYTE) foundbuf, |
| 269 | &maxlen); |
| 270 | RegCloseKey (hTmp); |
| 271 | if (res != ERROR_SUCCESS) |
| 272 | { |
| 273 | free (foundbuf); |
| 274 | return executable; |
| 275 | } |
| 276 | |
| 277 | /* Concatenate the install location and the executable, turn all slashes |
| 278 | to backslashes, and return that. */ |
| 279 | return tack_on_executable (foundbuf, executable); |
| 280 | } |
| 281 | |
| 282 | /* Read the install location of msys from it's installation file and |
| 283 | rootify the executable based on that. */ |
| 284 | static const char * |
| 285 | msys_rootify (const char *executable) |
| 286 | { |
| 287 | size_t bufsize = 64; |
| 288 | size_t execlen = strlen (executable) + 1; |
| 289 | char *buf; |
| 290 | DWORD res = 0; |
| 291 | for (;;) |
| 292 | { |
| 293 | buf = XNEWVEC (char, bufsize + execlen); |
| 294 | if (!buf) |
| 295 | break; |
| 296 | res = GetPrivateProfileString ("InstallSettings", "InstallPath", NULL, |
| 297 | buf, bufsize, "msys.ini"); |
| 298 | if (!res) |
| 299 | break; |
| 300 | if (strlen (buf) < bufsize) |
| 301 | break; |
| 302 | res = 0; |
| 303 | free (buf); |
| 304 | bufsize *= 2; |
| 305 | if (bufsize > 65536) |
| 306 | { |
| 307 | buf = NULL; |
| 308 | break; |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | if (res) |
| 313 | return tack_on_executable (buf, executable); |
| 314 | |
| 315 | /* failed */ |
| 316 | free (buf); |
| 317 | return executable; |
| 318 | } |
| 319 | #endif |
| 320 | |
| 321 | /* Return the number of arguments in an argv array, not including the null |
| 322 | terminating argument. */ |
| 323 | |
| 324 | static int |
| 325 | argv_to_argc (char *const *argv) |
| 326 | { |
| 327 | char *const *i = argv; |
| 328 | while (*i) |
| 329 | i++; |
| 330 | return i - argv; |
| 331 | } |
| 332 | |
| 333 | /* Return a Windows command-line from ARGV. It is the caller's |
| 334 | responsibility to free the string returned. */ |
| 335 | |
| 336 | static char * |
| 337 | argv_to_cmdline (char *const *argv) |
| 338 | { |
| 339 | char *cmdline; |
| 340 | char *p; |
| 341 | size_t cmdline_len; |
| 342 | int i, j, k; |
| 343 | |
| 344 | cmdline_len = 0; |
| 345 | for (i = 0; argv[i]; i++) |
| 346 | { |
| 347 | /* We quote every last argument. This simplifies the problem; |
| 348 | we need only escape embedded double-quotes and immediately |
| 349 | preceeding backslash characters. A sequence of backslach characters |
| 350 | that is not follwed by a double quote character will not be |
| 351 | escaped. */ |
| 352 | for (j = 0; argv[i][j]; j++) |
| 353 | { |
| 354 | if (argv[i][j] == '"') |
| 355 | { |
| 356 | /* Escape preceeding backslashes. */ |
| 357 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) |
| 358 | cmdline_len++; |
| 359 | /* Escape the qote character. */ |
| 360 | cmdline_len++; |
| 361 | } |
| 362 | } |
| 363 | /* Trailing backslashes also need to be escaped because they will be |
| 364 | followed by the terminating quote. */ |
| 365 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) |
| 366 | cmdline_len++; |
| 367 | cmdline_len += j; |
| 368 | cmdline_len += 3; /* for leading and trailing quotes and space */ |
| 369 | } |
| 370 | cmdline = XNEWVEC (char, cmdline_len); |
| 371 | p = cmdline; |
| 372 | for (i = 0; argv[i]; i++) |
| 373 | { |
| 374 | *p++ = '"'; |
| 375 | for (j = 0; argv[i][j]; j++) |
| 376 | { |
| 377 | if (argv[i][j] == '"') |
| 378 | { |
| 379 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) |
| 380 | *p++ = '\\'; |
| 381 | *p++ = '\\'; |
| 382 | } |
| 383 | *p++ = argv[i][j]; |
| 384 | } |
| 385 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) |
| 386 | *p++ = '\\'; |
| 387 | *p++ = '"'; |
| 388 | *p++ = ' '; |
| 389 | } |
| 390 | p[-1] = '\0'; |
| 391 | return cmdline; |
| 392 | } |
| 393 | |
| 394 | /* We'll try the passed filename with all the known standard |
| 395 | extensions, and then without extension. We try no extension |
| 396 | last so that we don't try to run some random extension-less |
| 397 | file that might be hanging around. We try both extension |
| 398 | and no extension so that we don't need any fancy logic |
| 399 | to determine if a file has extension. */ |
| 400 | static const char *const |
| 401 | std_suffixes[] = { |
| 402 | ".com", |
| 403 | ".exe", |
| 404 | ".bat", |
| 405 | ".cmd", |
| 406 | "", |
| 407 | 0 |
| 408 | }; |
| 409 | |
| 410 | /* Returns the full path to PROGRAM. If SEARCH is true, look for |
| 411 | PROGRAM in each directory in PATH. */ |
| 412 | |
| 413 | static char * |
| 414 | find_executable (const char *program, BOOL search) |
| 415 | { |
| 416 | char *full_executable; |
| 417 | char *e; |
| 418 | size_t fe_len; |
| 419 | const char *path = 0; |
| 420 | const char *const *ext; |
| 421 | const char *p, *q; |
| 422 | size_t proglen = strlen (program); |
| 423 | int has_slash = (strchr (program, '/') || strchr (program, '\\')); |
| 424 | HANDLE h; |
| 425 | |
| 426 | if (has_slash) |
| 427 | search = FALSE; |
| 428 | |
| 429 | if (search) |
| 430 | path = getenv ("PATH"); |
| 431 | if (!path) |
| 432 | path = ""; |
| 433 | |
| 434 | fe_len = 0; |
| 435 | for (p = path; *p; p = q) |
| 436 | { |
| 437 | q = p; |
| 438 | while (*q != ';' && *q != '\0') |
| 439 | q++; |
| 440 | if ((size_t)(q - p) > fe_len) |
| 441 | fe_len = q - p; |
| 442 | if (*q == ';') |
| 443 | q++; |
| 444 | } |
| 445 | fe_len = fe_len + 1 + proglen + 5 /* space for extension */; |
| 446 | full_executable = XNEWVEC (char, fe_len); |
| 447 | |
| 448 | p = path; |
| 449 | do |
| 450 | { |
| 451 | q = p; |
| 452 | while (*q != ';' && *q != '\0') |
| 453 | q++; |
| 454 | |
| 455 | e = full_executable; |
| 456 | memcpy (e, p, q - p); |
| 457 | e += (q - p); |
| 458 | if (q - p) |
| 459 | *e++ = '\\'; |
| 460 | strcpy (e, program); |
| 461 | |
| 462 | if (*q == ';') |
| 463 | q++; |
| 464 | |
| 465 | for (e = full_executable; *e; e++) |
| 466 | if (*e == '/') |
| 467 | *e = '\\'; |
| 468 | |
| 469 | /* At this point, e points to the terminating NUL character for |
| 470 | full_executable. */ |
| 471 | for (ext = std_suffixes; *ext; ext++) |
| 472 | { |
| 473 | /* Remove any current extension. */ |
| 474 | *e = '\0'; |
| 475 | /* Add the new one. */ |
| 476 | strcat (full_executable, *ext); |
| 477 | |
| 478 | /* Attempt to open this file. */ |
| 479 | h = CreateFile (full_executable, GENERIC_READ, |
| 480 | FILE_SHARE_READ | FILE_SHARE_WRITE, |
| 481 | 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); |
| 482 | if (h != INVALID_HANDLE_VALUE) |
| 483 | goto found; |
| 484 | } |
| 485 | p = q; |
| 486 | } |
| 487 | while (*p); |
| 488 | free (full_executable); |
| 489 | return 0; |
| 490 | |
| 491 | found: |
| 492 | CloseHandle (h); |
| 493 | return full_executable; |
| 494 | } |
| 495 | |
| 496 | /* Low-level process creation function and helper. */ |
| 497 | |
| 498 | static int |
| 499 | env_compare (const void *a_ptr, const void *b_ptr) |
| 500 | { |
| 501 | const char *a; |
| 502 | const char *b; |
| 503 | unsigned char c1; |
| 504 | unsigned char c2; |
| 505 | |
| 506 | a = *(const char **) a_ptr; |
| 507 | b = *(const char **) b_ptr; |
| 508 | |
| 509 | /* a and b will be of the form: VAR=VALUE |
| 510 | We compare only the variable name part here using a case-insensitive |
| 511 | comparison algorithm. It might appear that in fact strcasecmp () can |
| 512 | take the place of this whole function, and indeed it could, save for |
| 513 | the fact that it would fail in cases such as comparing A1=foo and |
| 514 | A=bar (because 1 is less than = in the ASCII character set). |
| 515 | (Environment variables containing no numbers would work in such a |
| 516 | scenario.) */ |
| 517 | |
| 518 | do |
| 519 | { |
| 520 | c1 = (unsigned char) tolower (*a++); |
| 521 | c2 = (unsigned char) tolower (*b++); |
| 522 | |
| 523 | if (c1 == '=') |
| 524 | c1 = '\0'; |
| 525 | |
| 526 | if (c2 == '=') |
| 527 | c2 = '\0'; |
| 528 | } |
| 529 | while (c1 == c2 && c1 != '\0'); |
| 530 | |
| 531 | return c1 - c2; |
| 532 | } |
| 533 | |
| 534 | /* Execute a Windows executable as a child process. This will fail if the |
| 535 | * target is not actually an executable, such as if it is a shell script. */ |
| 536 | |
| 537 | static pid_t |
| 538 | win32_spawn (const char *executable, |
| 539 | BOOL search, |
| 540 | char *const *argv, |
| 541 | char *const *env, /* array of strings of the form: VAR=VALUE */ |
| 542 | DWORD dwCreationFlags, |
| 543 | LPSTARTUPINFO si, |
| 544 | LPPROCESS_INFORMATION pi) |
| 545 | { |
| 546 | char *full_executable; |
| 547 | char *cmdline; |
| 548 | char **env_copy; |
| 549 | char *env_block = NULL; |
| 550 | |
| 551 | full_executable = NULL; |
| 552 | cmdline = NULL; |
| 553 | |
| 554 | if (env) |
| 555 | { |
| 556 | int env_size; |
| 557 | |
| 558 | /* Count the number of environment bindings supplied. */ |
| 559 | for (env_size = 0; env[env_size]; env_size++) |
| 560 | continue; |
| 561 | |
| 562 | /* Assemble an environment block, if required. This consists of |
| 563 | VAR=VALUE strings juxtaposed (with one null character between each |
| 564 | pair) and an additional null at the end. */ |
| 565 | if (env_size > 0) |
| 566 | { |
| 567 | int var; |
| 568 | int total_size = 1; /* 1 is for the final null. */ |
| 569 | char *bufptr; |
| 570 | |
| 571 | /* Windows needs the members of the block to be sorted by variable |
| 572 | name. */ |
| 573 | env_copy = (char **) alloca (sizeof (char *) * env_size); |
| 574 | memcpy (env_copy, env, sizeof (char *) * env_size); |
| 575 | qsort (env_copy, env_size, sizeof (char *), env_compare); |
| 576 | |
| 577 | for (var = 0; var < env_size; var++) |
| 578 | total_size += strlen (env[var]) + 1; |
| 579 | |
| 580 | env_block = XNEWVEC (char, total_size); |
| 581 | bufptr = env_block; |
| 582 | for (var = 0; var < env_size; var++) |
| 583 | bufptr = stpcpy (bufptr, env_copy[var]) + 1; |
| 584 | |
| 585 | *bufptr = '\0'; |
| 586 | } |
| 587 | } |
| 588 | |
| 589 | full_executable = find_executable (executable, search); |
| 590 | if (!full_executable) |
| 591 | goto error; |
| 592 | cmdline = argv_to_cmdline (argv); |
| 593 | if (!cmdline) |
| 594 | goto error; |
| 595 | |
| 596 | /* Create the child process. */ |
| 597 | if (!CreateProcess (full_executable, cmdline, |
| 598 | /*lpProcessAttributes=*/NULL, |
| 599 | /*lpThreadAttributes=*/NULL, |
| 600 | /*bInheritHandles=*/TRUE, |
| 601 | dwCreationFlags, |
| 602 | (LPVOID) env_block, |
| 603 | /*lpCurrentDirectory=*/NULL, |
| 604 | si, |
| 605 | pi)) |
| 606 | { |
| 607 | free (env_block); |
| 608 | |
| 609 | free (full_executable); |
| 610 | |
| 611 | return (pid_t) -1; |
| 612 | } |
| 613 | |
| 614 | /* Clean up. */ |
| 615 | CloseHandle (pi->hThread); |
| 616 | free (full_executable); |
| 617 | free (env_block); |
| 618 | |
| 619 | return (pid_t) pi->hProcess; |
| 620 | |
| 621 | error: |
| 622 | free (env_block); |
| 623 | free (cmdline); |
| 624 | free (full_executable); |
| 625 | |
| 626 | return (pid_t) -1; |
| 627 | } |
| 628 | |
| 629 | /* Spawn a script. This simulates the Unix script execution mechanism. |
| 630 | This function is called as a fallback if win32_spawn fails. */ |
| 631 | |
| 632 | static pid_t |
| 633 | spawn_script (const char *executable, char *const *argv, |
| 634 | char* const *env, |
| 635 | DWORD dwCreationFlags, |
| 636 | LPSTARTUPINFO si, |
| 637 | LPPROCESS_INFORMATION pi) |
| 638 | { |
| 639 | pid_t pid = (pid_t) -1; |
| 640 | int save_errno = errno; |
| 641 | int fd = _open (executable, _O_RDONLY); |
| 642 | |
| 643 | /* Try to open script, check header format, extract interpreter path, |
| 644 | and spawn script using that interpretter. */ |
| 645 | if (fd >= 0) |
| 646 | { |
| 647 | char buf[MAX_PATH + 5]; |
| 648 | int len = _read (fd, buf, sizeof (buf) - 1); |
| 649 | _close (fd); |
| 650 | if (len > 3) |
| 651 | { |
| 652 | char *eol; |
| 653 | buf[len] = '\0'; |
| 654 | eol = strchr (buf, '\n'); |
| 655 | if (eol && strncmp (buf, "#!", 2) == 0) |
| 656 | { |
| 657 | |
| 658 | /* Header format is OK. */ |
| 659 | char *executable1; |
| 660 | int new_argc; |
| 661 | const char **avhere; |
| 662 | |
| 663 | /* Extract interpreter path. */ |
| 664 | do |
| 665 | *eol = '\0'; |
| 666 | while (*--eol == '\r' || *eol == ' ' || *eol == '\t'); |
| 667 | for (executable1 = buf + 2; *executable1 == ' ' || *executable1 == '\t'; executable1++) |
| 668 | continue; |
| 669 | backslashify (executable1); |
| 670 | |
| 671 | /* Duplicate argv, prepending the interpreter path. */ |
| 672 | new_argc = argv_to_argc (argv) + 1; |
| 673 | avhere = XNEWVEC (const char *, new_argc + 1); |
| 674 | *avhere = executable1; |
| 675 | memcpy (avhere + 1, argv, new_argc * sizeof(*argv)); |
| 676 | argv = (char *const *)avhere; |
| 677 | |
| 678 | /* Spawn the child. */ |
| 679 | #ifndef USE_MINGW_MSYS |
| 680 | executable = strrchr (executable1, '\\') + 1; |
| 681 | if (!executable) |
| 682 | executable = executable1; |
| 683 | pid = win32_spawn (executable, TRUE, argv, env, |
| 684 | dwCreationFlags, si, pi); |
| 685 | #else |
| 686 | if (strchr (executable1, '\\') == NULL) |
| 687 | pid = win32_spawn (executable1, TRUE, argv, env, |
| 688 | dwCreationFlags, si, pi); |
| 689 | else if (executable1[0] != '\\') |
| 690 | pid = win32_spawn (executable1, FALSE, argv, env, |
| 691 | dwCreationFlags, si, pi); |
| 692 | else |
| 693 | { |
| 694 | const char *newex = mingw_rootify (executable1); |
| 695 | *avhere = newex; |
| 696 | pid = win32_spawn (newex, FALSE, argv, env, |
| 697 | dwCreationFlags, si, pi); |
| 698 | if (executable1 != newex) |
| 699 | free ((char *) newex); |
| 700 | if (pid == (pid_t) -1) |
| 701 | { |
| 702 | newex = msys_rootify (executable1); |
| 703 | if (newex != executable1) |
| 704 | { |
| 705 | *avhere = newex; |
| 706 | pid = win32_spawn (newex, FALSE, argv, env, |
| 707 | dwCreationFlags, si, pi); |
| 708 | free ((char *) newex); |
| 709 | } |
| 710 | } |
| 711 | } |
| 712 | #endif |
| 713 | free (avhere); |
| 714 | } |
| 715 | } |
| 716 | } |
| 717 | if (pid == (pid_t) -1) |
| 718 | errno = save_errno; |
| 719 | return pid; |
| 720 | } |
| 721 | |
| 722 | /* Execute a child. */ |
| 723 | |
| 724 | static pid_t |
| 725 | pex_win32_exec_child (struct pex_obj *obj ATTRIBUTE_UNUSED, int flags, |
| 726 | const char *executable, char * const * argv, |
| 727 | char* const* env, |
| 728 | int in, int out, int errdes, |
| 729 | int toclose ATTRIBUTE_UNUSED, |
| 730 | const char **errmsg, |
| 731 | int *err) |
| 732 | { |
| 733 | pid_t pid; |
| 734 | HANDLE stdin_handle; |
| 735 | HANDLE stdout_handle; |
| 736 | HANDLE stderr_handle; |
| 737 | DWORD dwCreationFlags; |
| 738 | OSVERSIONINFO version_info; |
| 739 | STARTUPINFO si; |
| 740 | PROCESS_INFORMATION pi; |
| 741 | int orig_out, orig_in, orig_err; |
| 742 | BOOL separate_stderr = !(flags & PEX_STDERR_TO_STDOUT); |
| 743 | |
| 744 | /* Ensure we have inheritable descriptors to pass to the child. */ |
| 745 | orig_in = in; |
| 746 | in = _dup (orig_in); |
| 747 | |
| 748 | orig_out = out; |
| 749 | out = _dup (orig_out); |
| 750 | |
| 751 | if (separate_stderr) |
| 752 | { |
| 753 | orig_err = errdes; |
| 754 | errdes = _dup (orig_err); |
| 755 | } |
| 756 | |
| 757 | stdin_handle = INVALID_HANDLE_VALUE; |
| 758 | stdout_handle = INVALID_HANDLE_VALUE; |
| 759 | stderr_handle = INVALID_HANDLE_VALUE; |
| 760 | |
| 761 | stdin_handle = (HANDLE) _get_osfhandle (in); |
| 762 | stdout_handle = (HANDLE) _get_osfhandle (out); |
| 763 | if (separate_stderr) |
| 764 | stderr_handle = (HANDLE) _get_osfhandle (errdes); |
| 765 | else |
| 766 | stderr_handle = stdout_handle; |
| 767 | |
| 768 | /* Determine the version of Windows we are running on. */ |
| 769 | version_info.dwOSVersionInfoSize = sizeof (version_info); |
| 770 | GetVersionEx (&version_info); |
| 771 | if (version_info.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) |
| 772 | /* On Windows 95/98/ME the CREATE_NO_WINDOW flag is not |
| 773 | supported, so we cannot avoid creating a console window. */ |
| 774 | dwCreationFlags = 0; |
| 775 | else |
| 776 | { |
| 777 | HANDLE conout_handle; |
| 778 | |
| 779 | /* Determine whether or not we have an associated console. */ |
| 780 | conout_handle = CreateFile("CONOUT$", |
| 781 | GENERIC_WRITE, |
| 782 | FILE_SHARE_WRITE, |
| 783 | /*lpSecurityAttributes=*/NULL, |
| 784 | OPEN_EXISTING, |
| 785 | FILE_ATTRIBUTE_NORMAL, |
| 786 | /*hTemplateFile=*/NULL); |
| 787 | if (conout_handle == INVALID_HANDLE_VALUE) |
| 788 | /* There is no console associated with this process. Since |
| 789 | the child is a console process, the OS would normally |
| 790 | create a new console Window for the child. Since we'll be |
| 791 | redirecting the child's standard streams, we do not need |
| 792 | the console window. */ |
| 793 | dwCreationFlags = CREATE_NO_WINDOW; |
| 794 | else |
| 795 | { |
| 796 | /* There is a console associated with the process, so the OS |
| 797 | will not create a new console. And, if we use |
| 798 | CREATE_NO_WINDOW in this situation, the child will have |
| 799 | no associated console. Therefore, if the child's |
| 800 | standard streams are connected to the console, the output |
| 801 | will be discarded. */ |
| 802 | CloseHandle(conout_handle); |
| 803 | dwCreationFlags = 0; |
| 804 | } |
| 805 | } |
| 806 | |
| 807 | /* Since the child will be a console process, it will, by default, |
| 808 | connect standard input/output to its console. However, we want |
| 809 | the child to use the handles specifically designated above. In |
| 810 | addition, if there is no console (such as when we are running in |
| 811 | a Cygwin X window), then we must redirect the child's |
| 812 | input/output, as there is no console for the child to use. */ |
| 813 | memset (&si, 0, sizeof (si)); |
| 814 | si.cb = sizeof (si); |
| 815 | si.dwFlags = STARTF_USESTDHANDLES; |
| 816 | si.hStdInput = stdin_handle; |
| 817 | si.hStdOutput = stdout_handle; |
| 818 | si.hStdError = stderr_handle; |
| 819 | |
| 820 | /* Create the child process. */ |
| 821 | pid = win32_spawn (executable, (flags & PEX_SEARCH) != 0, |
| 822 | argv, env, dwCreationFlags, &si, &pi); |
| 823 | if (pid == (pid_t) -1) |
| 824 | pid = spawn_script (executable, argv, env, dwCreationFlags, |
| 825 | &si, &pi); |
| 826 | if (pid == (pid_t) -1) |
| 827 | { |
| 828 | *err = ENOENT; |
| 829 | *errmsg = "CreateProcess"; |
| 830 | } |
| 831 | |
| 832 | /* If the child was created successfully, close the original file |
| 833 | descriptors. If the process creation fails, these are closed by |
| 834 | pex_run_in_environment instead. We must not close them twice as |
| 835 | that seems to cause a Windows exception. */ |
| 836 | |
| 837 | if (pid != (pid_t) -1) |
| 838 | { |
| 839 | if (orig_in != STDIN_FILENO) |
| 840 | _close (orig_in); |
| 841 | if (orig_out != STDOUT_FILENO) |
| 842 | _close (orig_out); |
| 843 | if (separate_stderr |
| 844 | && orig_err != STDERR_FILENO) |
| 845 | _close (orig_err); |
| 846 | } |
| 847 | |
| 848 | /* Close the standard input, standard output and standard error handles |
| 849 | in the parent. */ |
| 850 | |
| 851 | _close (in); |
| 852 | _close (out); |
| 853 | if (separate_stderr) |
| 854 | _close (errdes); |
| 855 | |
| 856 | return pid; |
| 857 | } |
| 858 | |
| 859 | /* Wait for a child process to complete. MS CRTDLL doesn't return |
| 860 | enough information in status to decide if the child exited due to a |
| 861 | signal or not, rather it simply returns an integer with the exit |
| 862 | code of the child; eg., if the child exited with an abort() call |
| 863 | and didn't have a handler for SIGABRT, it simply returns with |
| 864 | status == 3. We fix the status code to conform to the usual WIF* |
| 865 | macros. Note that WIFSIGNALED will never be true under CRTDLL. */ |
| 866 | |
| 867 | static pid_t |
| 868 | pex_win32_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, |
| 869 | int *status, struct pex_time *time, int done ATTRIBUTE_UNUSED, |
| 870 | const char **errmsg, int *err) |
| 871 | { |
| 872 | DWORD termstat; |
| 873 | HANDLE h; |
| 874 | |
| 875 | if (time != NULL) |
| 876 | memset (time, 0, sizeof *time); |
| 877 | |
| 878 | h = (HANDLE) pid; |
| 879 | |
| 880 | /* FIXME: If done is non-zero, we should probably try to kill the |
| 881 | process. */ |
| 882 | if (WaitForSingleObject (h, INFINITE) != WAIT_OBJECT_0) |
| 883 | { |
| 884 | CloseHandle (h); |
| 885 | *err = ECHILD; |
| 886 | *errmsg = "WaitForSingleObject"; |
| 887 | return -1; |
| 888 | } |
| 889 | |
| 890 | GetExitCodeProcess (h, &termstat); |
| 891 | CloseHandle (h); |
| 892 | |
| 893 | /* A value of 3 indicates that the child caught a signal, but not |
| 894 | which one. Since only SIGABRT, SIGFPE and SIGINT do anything, we |
| 895 | report SIGABRT. */ |
| 896 | if (termstat == 3) |
| 897 | *status = SIGABRT; |
| 898 | else |
| 899 | *status = (termstat & 0xff) << 8; |
| 900 | |
| 901 | return 0; |
| 902 | } |
| 903 | |
| 904 | /* Create a pipe. */ |
| 905 | |
| 906 | static int |
| 907 | pex_win32_pipe (struct pex_obj *obj ATTRIBUTE_UNUSED, int *p, |
| 908 | int binary) |
| 909 | { |
| 910 | return _pipe (p, 256, (binary ? _O_BINARY : _O_TEXT) | _O_NOINHERIT); |
| 911 | } |
| 912 | |
| 913 | /* Get a FILE pointer to read from a file descriptor. */ |
| 914 | |
| 915 | static FILE * |
| 916 | pex_win32_fdopenr (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, |
| 917 | int binary) |
| 918 | { |
| 919 | HANDLE h = (HANDLE) _get_osfhandle (fd); |
| 920 | if (h == INVALID_HANDLE_VALUE) |
| 921 | return NULL; |
| 922 | if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) |
| 923 | return NULL; |
| 924 | return fdopen (fd, binary ? "rb" : "r"); |
| 925 | } |
| 926 | |
| 927 | static FILE * |
| 928 | pex_win32_fdopenw (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, |
| 929 | int binary) |
| 930 | { |
| 931 | HANDLE h = (HANDLE) _get_osfhandle (fd); |
| 932 | if (h == INVALID_HANDLE_VALUE) |
| 933 | return NULL; |
| 934 | if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) |
| 935 | return NULL; |
| 936 | return fdopen (fd, binary ? "wb" : "w"); |
| 937 | } |
| 938 | |
| 939 | #ifdef MAIN |
| 940 | #include <stdio.h> |
| 941 | |
| 942 | int |
| 943 | main (int argc ATTRIBUTE_UNUSED, char **argv) |
| 944 | { |
| 945 | char const *errmsg; |
| 946 | int err; |
| 947 | argv++; |
| 948 | printf ("%ld\n", (long) pex_win32_exec_child (NULL, PEX_SEARCH, argv[0], argv, NULL, 0, 0, 1, 2, &errmsg, &err)); |
| 949 | exit (0); |
| 950 | } |
| 951 | #endif |