Mercurial > hg > CbC > CbC_gcc
annotate libiberty/pex-win32.c @ 158:494b0b89df80 default tip
...
author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
---|---|
date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 1830386684a0 |
children |
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. | |
145 | 3 Copyright (C) 1996-2020 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 |