Commit | Line | Data |
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5a17353c DD |
1 | /* Utilities to execute a program in a subprocess (possibly linked by pipes |
2 | with other subprocesses), and wait for it. Generic Win32 specialization. | |
3ac01eb2 | 3 | Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006 |
5a17353c DD |
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, | |
979c05d3 NC |
19 | write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
5a17353c DD |
21 | |
22 | #include "pex-common.h" | |
23 | ||
f59e96e0 DD |
24 | #include <windows.h> |
25 | ||
b109e79a ILT |
26 | #ifdef HAVE_STDLIB_H |
27 | #include <stdlib.h> | |
28 | #endif | |
5a17353c DD |
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 | ||
014a8caf | 39 | #include <assert.h> |
5a17353c DD |
40 | #include <process.h> |
41 | #include <io.h> | |
42 | #include <fcntl.h> | |
43 | #include <signal.h> | |
b109e79a | 44 | #include <sys/stat.h> |
8e1e9959 | 45 | #include <errno.h> |
014a8caf | 46 | #include <ctype.h> |
5a17353c DD |
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 | ||
f59e96e0 DD |
61 | #define MINGW_NAME "Minimalist GNU for Windows" |
62 | #define MINGW_NAME_LEN (sizeof(MINGW_NAME) - 1) | |
63 | ||
014a8caf DD |
64 | extern char *stpcpy (char *dst, const char *src); |
65 | ||
f59e96e0 DD |
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 | ||
b109e79a ILT |
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); | |
29d89e07 | 82 | static pid_t pex_win32_exec_child (struct pex_obj *, int, const char *, |
014a8caf | 83 | char * const *, char * const *, |
cb6c09ac | 84 | int, int, int, int, |
b109e79a ILT |
85 | const char **, int *); |
86 | static int pex_win32_close (struct pex_obj *, int); | |
587c6b96 | 87 | static pid_t pex_win32_wait (struct pex_obj *, pid_t, int *, |
b109e79a ILT |
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); | |
3db2e6dd | 91 | static FILE *pex_win32_fdopenw (struct pex_obj *, int, int); |
b109e79a ILT |
92 | |
93 | /* The list of functions we pass to the common routines. */ | |
94 | ||
95 | const struct pex_funcs funcs = | |
5a17353c | 96 | { |
b109e79a ILT |
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, | |
3db2e6dd | 104 | pex_win32_fdopenw, |
b109e79a ILT |
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 | ||
f59e96e0 DD |
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); | |
4ff224cb DD |
213 | free (namebuf); |
214 | free (foundbuf); | |
f59e96e0 DD |
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 */ | |
4ff224cb | 316 | free (buf); |
f59e96e0 DD |
317 | return executable; |
318 | } | |
319 | #endif | |
320 | ||
bd8aab1c DD |
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 | ||
8e1e9959 DD |
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; | |
f69123aa | 343 | int needs_quotes; |
8e1e9959 DD |
344 | |
345 | cmdline_len = 0; | |
346 | for (i = 0; argv[i]; i++) | |
347 | { | |
f69123aa KT |
348 | /* We only quote arguments that contain spaces, \t or " characters to |
349 | prevent wasting 2 chars per argument of the CreateProcess 32k char | |
350 | limit. We need only escape embedded double-quotes and immediately | |
8e1e9959 DD |
351 | preceeding backslash characters. A sequence of backslach characters |
352 | that is not follwed by a double quote character will not be | |
353 | escaped. */ | |
f69123aa | 354 | needs_quotes = 0; |
8e1e9959 DD |
355 | for (j = 0; argv[i][j]; j++) |
356 | { | |
f69123aa KT |
357 | if (argv[i][j] == ' ' || argv[i][j] == '\t' || argv[i][j] == '"') |
358 | { | |
359 | needs_quotes = 1; | |
360 | } | |
361 | ||
8e1e9959 DD |
362 | if (argv[i][j] == '"') |
363 | { | |
364 | /* Escape preceeding backslashes. */ | |
365 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
366 | cmdline_len++; | |
367 | /* Escape the qote character. */ | |
368 | cmdline_len++; | |
369 | } | |
370 | } | |
371 | /* Trailing backslashes also need to be escaped because they will be | |
372 | followed by the terminating quote. */ | |
f69123aa KT |
373 | if (needs_quotes) |
374 | { | |
375 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
376 | cmdline_len++; | |
377 | } | |
8e1e9959 | 378 | cmdline_len += j; |
f69123aa KT |
379 | /* for leading and trailing quotes and space */ |
380 | cmdline_len += needs_quotes * 2 + 1; | |
8e1e9959 | 381 | } |
3ac01eb2 | 382 | cmdline = XNEWVEC (char, cmdline_len); |
8e1e9959 DD |
383 | p = cmdline; |
384 | for (i = 0; argv[i]; i++) | |
385 | { | |
f69123aa KT |
386 | needs_quotes = 0; |
387 | for (j = 0; argv[i][j]; j++) | |
388 | { | |
389 | if (argv[i][j] == ' ' || argv[i][j] == '\t' || argv[i][j] == '"') | |
390 | { | |
391 | needs_quotes = 1; | |
392 | break; | |
393 | } | |
394 | } | |
395 | ||
396 | if (needs_quotes) | |
397 | { | |
398 | *p++ = '"'; | |
399 | } | |
8e1e9959 DD |
400 | for (j = 0; argv[i][j]; j++) |
401 | { | |
402 | if (argv[i][j] == '"') | |
403 | { | |
404 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
405 | *p++ = '\\'; | |
406 | *p++ = '\\'; | |
407 | } | |
408 | *p++ = argv[i][j]; | |
409 | } | |
f69123aa KT |
410 | if (needs_quotes) |
411 | { | |
412 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
413 | *p++ = '\\'; | |
414 | *p++ = '"'; | |
415 | } | |
8e1e9959 DD |
416 | *p++ = ' '; |
417 | } | |
418 | p[-1] = '\0'; | |
419 | return cmdline; | |
420 | } | |
421 | ||
fb347196 VP |
422 | /* We'll try the passed filename with all the known standard |
423 | extensions, and then without extension. We try no extension | |
424 | last so that we don't try to run some random extension-less | |
425 | file that might be hanging around. We try both extension | |
426 | and no extension so that we don't need any fancy logic | |
427 | to determine if a file has extension. */ | |
8e1e9959 DD |
428 | static const char *const |
429 | std_suffixes[] = { | |
430 | ".com", | |
431 | ".exe", | |
432 | ".bat", | |
433 | ".cmd", | |
8e1e9959 DD |
434 | "", |
435 | 0 | |
436 | }; | |
437 | ||
438 | /* Returns the full path to PROGRAM. If SEARCH is true, look for | |
439 | PROGRAM in each directory in PATH. */ | |
440 | ||
441 | static char * | |
442 | find_executable (const char *program, BOOL search) | |
443 | { | |
444 | char *full_executable; | |
445 | char *e; | |
446 | size_t fe_len; | |
447 | const char *path = 0; | |
448 | const char *const *ext; | |
449 | const char *p, *q; | |
450 | size_t proglen = strlen (program); | |
8e1e9959 DD |
451 | int has_slash = (strchr (program, '/') || strchr (program, '\\')); |
452 | HANDLE h; | |
453 | ||
454 | if (has_slash) | |
455 | search = FALSE; | |
456 | ||
457 | if (search) | |
458 | path = getenv ("PATH"); | |
459 | if (!path) | |
460 | path = ""; | |
461 | ||
462 | fe_len = 0; | |
463 | for (p = path; *p; p = q) | |
464 | { | |
465 | q = p; | |
466 | while (*q != ';' && *q != '\0') | |
467 | q++; | |
468 | if ((size_t)(q - p) > fe_len) | |
469 | fe_len = q - p; | |
470 | if (*q == ';') | |
471 | q++; | |
472 | } | |
fb347196 | 473 | fe_len = fe_len + 1 + proglen + 5 /* space for extension */; |
3ac01eb2 | 474 | full_executable = XNEWVEC (char, fe_len); |
8e1e9959 DD |
475 | |
476 | p = path; | |
477 | do | |
478 | { | |
479 | q = p; | |
480 | while (*q != ';' && *q != '\0') | |
481 | q++; | |
482 | ||
483 | e = full_executable; | |
484 | memcpy (e, p, q - p); | |
485 | e += (q - p); | |
486 | if (q - p) | |
487 | *e++ = '\\'; | |
488 | strcpy (e, program); | |
489 | ||
490 | if (*q == ';') | |
491 | q++; | |
492 | ||
493 | for (e = full_executable; *e; e++) | |
494 | if (*e == '/') | |
495 | *e = '\\'; | |
496 | ||
497 | /* At this point, e points to the terminating NUL character for | |
498 | full_executable. */ | |
fb347196 | 499 | for (ext = std_suffixes; *ext; ext++) |
8e1e9959 DD |
500 | { |
501 | /* Remove any current extension. */ | |
502 | *e = '\0'; | |
503 | /* Add the new one. */ | |
504 | strcat (full_executable, *ext); | |
505 | ||
506 | /* Attempt to open this file. */ | |
507 | h = CreateFile (full_executable, GENERIC_READ, | |
508 | FILE_SHARE_READ | FILE_SHARE_WRITE, | |
509 | 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); | |
510 | if (h != INVALID_HANDLE_VALUE) | |
511 | goto found; | |
512 | } | |
513 | p = q; | |
514 | } | |
515 | while (*p); | |
516 | free (full_executable); | |
517 | return 0; | |
518 | ||
519 | found: | |
520 | CloseHandle (h); | |
521 | return full_executable; | |
522 | } | |
523 | ||
014a8caf DD |
524 | /* Low-level process creation function and helper. */ |
525 | ||
526 | static int | |
527 | env_compare (const void *a_ptr, const void *b_ptr) | |
528 | { | |
529 | const char *a; | |
530 | const char *b; | |
531 | unsigned char c1; | |
532 | unsigned char c2; | |
533 | ||
534 | a = *(const char **) a_ptr; | |
535 | b = *(const char **) b_ptr; | |
536 | ||
537 | /* a and b will be of the form: VAR=VALUE | |
538 | We compare only the variable name part here using a case-insensitive | |
539 | comparison algorithm. It might appear that in fact strcasecmp () can | |
540 | take the place of this whole function, and indeed it could, save for | |
541 | the fact that it would fail in cases such as comparing A1=foo and | |
542 | A=bar (because 1 is less than = in the ASCII character set). | |
543 | (Environment variables containing no numbers would work in such a | |
544 | scenario.) */ | |
545 | ||
546 | do | |
547 | { | |
548 | c1 = (unsigned char) tolower (*a++); | |
549 | c2 = (unsigned char) tolower (*b++); | |
550 | ||
551 | if (c1 == '=') | |
552 | c1 = '\0'; | |
553 | ||
554 | if (c2 == '=') | |
555 | c2 = '\0'; | |
556 | } | |
557 | while (c1 == c2 && c1 != '\0'); | |
558 | ||
559 | return c1 - c2; | |
560 | } | |
8e1e9959 | 561 | |
bd8aab1c DD |
562 | /* Execute a Windows executable as a child process. This will fail if the |
563 | * target is not actually an executable, such as if it is a shell script. */ | |
564 | ||
29d89e07 | 565 | static pid_t |
8e1e9959 DD |
566 | win32_spawn (const char *executable, |
567 | BOOL search, | |
568 | char *const *argv, | |
014a8caf | 569 | char *const *env, /* array of strings of the form: VAR=VALUE */ |
8e1e9959 DD |
570 | DWORD dwCreationFlags, |
571 | LPSTARTUPINFO si, | |
572 | LPPROCESS_INFORMATION pi) | |
573 | { | |
574 | char *full_executable; | |
575 | char *cmdline; | |
014a8caf DD |
576 | char **env_copy; |
577 | char *env_block = NULL; | |
8e1e9959 DD |
578 | |
579 | full_executable = NULL; | |
580 | cmdline = NULL; | |
581 | ||
014a8caf DD |
582 | if (env) |
583 | { | |
584 | int env_size; | |
585 | ||
586 | /* Count the number of environment bindings supplied. */ | |
587 | for (env_size = 0; env[env_size]; env_size++) | |
588 | continue; | |
589 | ||
590 | /* Assemble an environment block, if required. This consists of | |
591 | VAR=VALUE strings juxtaposed (with one null character between each | |
592 | pair) and an additional null at the end. */ | |
593 | if (env_size > 0) | |
594 | { | |
595 | int var; | |
596 | int total_size = 1; /* 1 is for the final null. */ | |
597 | char *bufptr; | |
598 | ||
599 | /* Windows needs the members of the block to be sorted by variable | |
600 | name. */ | |
3ac01eb2 | 601 | env_copy = (char **) alloca (sizeof (char *) * env_size); |
014a8caf DD |
602 | memcpy (env_copy, env, sizeof (char *) * env_size); |
603 | qsort (env_copy, env_size, sizeof (char *), env_compare); | |
604 | ||
605 | for (var = 0; var < env_size; var++) | |
606 | total_size += strlen (env[var]) + 1; | |
607 | ||
3ac01eb2 | 608 | env_block = XNEWVEC (char, total_size); |
014a8caf DD |
609 | bufptr = env_block; |
610 | for (var = 0; var < env_size; var++) | |
611 | bufptr = stpcpy (bufptr, env_copy[var]) + 1; | |
612 | ||
613 | *bufptr = '\0'; | |
614 | } | |
615 | } | |
616 | ||
8e1e9959 DD |
617 | full_executable = find_executable (executable, search); |
618 | if (!full_executable) | |
619 | goto error; | |
620 | cmdline = argv_to_cmdline (argv); | |
621 | if (!cmdline) | |
622 | goto error; | |
623 | ||
624 | /* Create the child process. */ | |
625 | if (!CreateProcess (full_executable, cmdline, | |
626 | /*lpProcessAttributes=*/NULL, | |
627 | /*lpThreadAttributes=*/NULL, | |
628 | /*bInheritHandles=*/TRUE, | |
629 | dwCreationFlags, | |
014a8caf | 630 | (LPVOID) env_block, |
8e1e9959 DD |
631 | /*lpCurrentDirectory=*/NULL, |
632 | si, | |
633 | pi)) | |
634 | { | |
4ff224cb | 635 | free (env_block); |
014a8caf | 636 | |
8e1e9959 | 637 | free (full_executable); |
014a8caf | 638 | |
29d89e07 | 639 | return (pid_t) -1; |
8e1e9959 DD |
640 | } |
641 | ||
642 | /* Clean up. */ | |
643 | CloseHandle (pi->hThread); | |
644 | free (full_executable); | |
4ff224cb | 645 | free (env_block); |
8e1e9959 | 646 | |
29d89e07 | 647 | return (pid_t) pi->hProcess; |
8e1e9959 DD |
648 | |
649 | error: | |
4ff224cb DD |
650 | free (env_block); |
651 | free (cmdline); | |
652 | free (full_executable); | |
014a8caf | 653 | |
29d89e07 | 654 | return (pid_t) -1; |
8e1e9959 DD |
655 | } |
656 | ||
bd8aab1c DD |
657 | /* Spawn a script. This simulates the Unix script execution mechanism. |
658 | This function is called as a fallback if win32_spawn fails. */ | |
659 | ||
29d89e07 | 660 | static pid_t |
8e1e9959 | 661 | spawn_script (const char *executable, char *const *argv, |
014a8caf | 662 | char* const *env, |
8e1e9959 DD |
663 | DWORD dwCreationFlags, |
664 | LPSTARTUPINFO si, | |
665 | LPPROCESS_INFORMATION pi) | |
f59e96e0 | 666 | { |
29d89e07 | 667 | pid_t pid = (pid_t) -1; |
f59e96e0 DD |
668 | int save_errno = errno; |
669 | int fd = _open (executable, _O_RDONLY); | |
670 | ||
bd8aab1c DD |
671 | /* Try to open script, check header format, extract interpreter path, |
672 | and spawn script using that interpretter. */ | |
f59e96e0 DD |
673 | if (fd >= 0) |
674 | { | |
675 | char buf[MAX_PATH + 5]; | |
676 | int len = _read (fd, buf, sizeof (buf) - 1); | |
677 | _close (fd); | |
678 | if (len > 3) | |
679 | { | |
680 | char *eol; | |
681 | buf[len] = '\0'; | |
682 | eol = strchr (buf, '\n'); | |
683 | if (eol && strncmp (buf, "#!", 2) == 0) | |
684 | { | |
bd8aab1c DD |
685 | |
686 | /* Header format is OK. */ | |
f59e96e0 | 687 | char *executable1; |
bd8aab1c DD |
688 | int new_argc; |
689 | const char **avhere; | |
690 | ||
691 | /* Extract interpreter path. */ | |
f59e96e0 DD |
692 | do |
693 | *eol = '\0'; | |
694 | while (*--eol == '\r' || *eol == ' ' || *eol == '\t'); | |
695 | for (executable1 = buf + 2; *executable1 == ' ' || *executable1 == '\t'; executable1++) | |
696 | continue; | |
f59e96e0 | 697 | backslashify (executable1); |
bd8aab1c DD |
698 | |
699 | /* Duplicate argv, prepending the interpreter path. */ | |
700 | new_argc = argv_to_argc (argv) + 1; | |
701 | avhere = XNEWVEC (const char *, new_argc + 1); | |
f59e96e0 | 702 | *avhere = executable1; |
bd8aab1c DD |
703 | memcpy (avhere + 1, argv, new_argc * sizeof(*argv)); |
704 | argv = (char *const *)avhere; | |
705 | ||
706 | /* Spawn the child. */ | |
f59e96e0 DD |
707 | #ifndef USE_MINGW_MSYS |
708 | executable = strrchr (executable1, '\\') + 1; | |
709 | if (!executable) | |
710 | executable = executable1; | |
014a8caf | 711 | pid = win32_spawn (executable, TRUE, argv, env, |
8e1e9959 | 712 | dwCreationFlags, si, pi); |
f59e96e0 DD |
713 | #else |
714 | if (strchr (executable1, '\\') == NULL) | |
014a8caf | 715 | pid = win32_spawn (executable1, TRUE, argv, env, |
8e1e9959 | 716 | dwCreationFlags, si, pi); |
f59e96e0 | 717 | else if (executable1[0] != '\\') |
014a8caf | 718 | pid = win32_spawn (executable1, FALSE, argv, env, |
8e1e9959 | 719 | dwCreationFlags, si, pi); |
f59e96e0 DD |
720 | else |
721 | { | |
722 | const char *newex = mingw_rootify (executable1); | |
723 | *avhere = newex; | |
014a8caf | 724 | pid = win32_spawn (newex, FALSE, argv, env, |
8e1e9959 | 725 | dwCreationFlags, si, pi); |
f59e96e0 DD |
726 | if (executable1 != newex) |
727 | free ((char *) newex); | |
587c6b96 | 728 | if (pid == (pid_t) -1) |
f59e96e0 DD |
729 | { |
730 | newex = msys_rootify (executable1); | |
731 | if (newex != executable1) | |
732 | { | |
733 | *avhere = newex; | |
014a8caf | 734 | pid = win32_spawn (newex, FALSE, argv, env, |
8e1e9959 | 735 | dwCreationFlags, si, pi); |
f59e96e0 DD |
736 | free ((char *) newex); |
737 | } | |
738 | } | |
739 | } | |
740 | #endif | |
bd8aab1c | 741 | free (avhere); |
f59e96e0 DD |
742 | } |
743 | } | |
744 | } | |
587c6b96 | 745 | if (pid == (pid_t) -1) |
f59e96e0 DD |
746 | errno = save_errno; |
747 | return pid; | |
748 | } | |
749 | ||
b109e79a ILT |
750 | /* Execute a child. */ |
751 | ||
29d89e07 | 752 | static pid_t |
b109e79a ILT |
753 | pex_win32_exec_child (struct pex_obj *obj ATTRIBUTE_UNUSED, int flags, |
754 | const char *executable, char * const * argv, | |
014a8caf | 755 | char* const* env, |
cb6c09ac DD |
756 | int in, int out, int errdes, |
757 | int toclose ATTRIBUTE_UNUSED, | |
758 | const char **errmsg, | |
b109e79a ILT |
759 | int *err) |
760 | { | |
29d89e07 | 761 | pid_t pid; |
8e1e9959 DD |
762 | HANDLE stdin_handle; |
763 | HANDLE stdout_handle; | |
764 | HANDLE stderr_handle; | |
765 | DWORD dwCreationFlags; | |
766 | OSVERSIONINFO version_info; | |
767 | STARTUPINFO si; | |
768 | PROCESS_INFORMATION pi; | |
59cdf842 JB |
769 | int orig_out, orig_in, orig_err; |
770 | BOOL separate_stderr = !(flags & PEX_STDERR_TO_STDOUT); | |
771 | ||
9974286e | 772 | /* Ensure we have inheritable descriptors to pass to the child. */ |
59cdf842 JB |
773 | orig_in = in; |
774 | in = _dup (orig_in); | |
59cdf842 JB |
775 | |
776 | orig_out = out; | |
777 | out = _dup (orig_out); | |
59cdf842 JB |
778 | |
779 | if (separate_stderr) | |
780 | { | |
781 | orig_err = errdes; | |
782 | errdes = _dup (orig_err); | |
59cdf842 | 783 | } |
8e1e9959 DD |
784 | |
785 | stdin_handle = INVALID_HANDLE_VALUE; | |
786 | stdout_handle = INVALID_HANDLE_VALUE; | |
787 | stderr_handle = INVALID_HANDLE_VALUE; | |
788 | ||
789 | stdin_handle = (HANDLE) _get_osfhandle (in); | |
790 | stdout_handle = (HANDLE) _get_osfhandle (out); | |
59cdf842 | 791 | if (separate_stderr) |
8e1e9959 DD |
792 | stderr_handle = (HANDLE) _get_osfhandle (errdes); |
793 | else | |
794 | stderr_handle = stdout_handle; | |
795 | ||
796 | /* Determine the version of Windows we are running on. */ | |
797 | version_info.dwOSVersionInfoSize = sizeof (version_info); | |
798 | GetVersionEx (&version_info); | |
799 | if (version_info.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) | |
800 | /* On Windows 95/98/ME the CREATE_NO_WINDOW flag is not | |
801 | supported, so we cannot avoid creating a console window. */ | |
802 | dwCreationFlags = 0; | |
803 | else | |
5a17353c | 804 | { |
8e1e9959 DD |
805 | HANDLE conout_handle; |
806 | ||
807 | /* Determine whether or not we have an associated console. */ | |
808 | conout_handle = CreateFile("CONOUT$", | |
809 | GENERIC_WRITE, | |
810 | FILE_SHARE_WRITE, | |
811 | /*lpSecurityAttributes=*/NULL, | |
812 | OPEN_EXISTING, | |
813 | FILE_ATTRIBUTE_NORMAL, | |
814 | /*hTemplateFile=*/NULL); | |
815 | if (conout_handle == INVALID_HANDLE_VALUE) | |
816 | /* There is no console associated with this process. Since | |
817 | the child is a console process, the OS would normally | |
818 | create a new console Window for the child. Since we'll be | |
819 | redirecting the child's standard streams, we do not need | |
820 | the console window. */ | |
821 | dwCreationFlags = CREATE_NO_WINDOW; | |
822 | else | |
b109e79a | 823 | { |
8e1e9959 DD |
824 | /* There is a console associated with the process, so the OS |
825 | will not create a new console. And, if we use | |
826 | CREATE_NO_WINDOW in this situation, the child will have | |
827 | no associated console. Therefore, if the child's | |
828 | standard streams are connected to the console, the output | |
829 | will be discarded. */ | |
830 | CloseHandle(conout_handle); | |
831 | dwCreationFlags = 0; | |
b109e79a | 832 | } |
5a17353c DD |
833 | } |
834 | ||
8e1e9959 DD |
835 | /* Since the child will be a console process, it will, by default, |
836 | connect standard input/output to its console. However, we want | |
837 | the child to use the handles specifically designated above. In | |
838 | addition, if there is no console (such as when we are running in | |
839 | a Cygwin X window), then we must redirect the child's | |
840 | input/output, as there is no console for the child to use. */ | |
841 | memset (&si, 0, sizeof (si)); | |
842 | si.cb = sizeof (si); | |
843 | si.dwFlags = STARTF_USESTDHANDLES; | |
844 | si.hStdInput = stdin_handle; | |
845 | si.hStdOutput = stdout_handle; | |
846 | si.hStdError = stderr_handle; | |
847 | ||
848 | /* Create the child process. */ | |
849 | pid = win32_spawn (executable, (flags & PEX_SEARCH) != 0, | |
014a8caf | 850 | argv, env, dwCreationFlags, &si, &pi); |
29d89e07 | 851 | if (pid == (pid_t) -1) |
014a8caf DD |
852 | pid = spawn_script (executable, argv, env, dwCreationFlags, |
853 | &si, &pi); | |
29d89e07 | 854 | if (pid == (pid_t) -1) |
5a17353c | 855 | { |
8e1e9959 DD |
856 | *err = ENOENT; |
857 | *errmsg = "CreateProcess"; | |
5a17353c DD |
858 | } |
859 | ||
9974286e DD |
860 | /* If the child was created successfully, close the original file |
861 | descriptors. If the process creation fails, these are closed by | |
862 | pex_run_in_environment instead. We must not close them twice as | |
863 | that seems to cause a Windows exception. */ | |
864 | ||
865 | if (pid != (pid_t) -1) | |
866 | { | |
867 | if (orig_in != STDIN_FILENO) | |
868 | _close (orig_in); | |
869 | if (orig_out != STDOUT_FILENO) | |
870 | _close (orig_out); | |
871 | if (separate_stderr | |
872 | && orig_err != STDERR_FILENO) | |
873 | _close (orig_err); | |
874 | } | |
875 | ||
59cdf842 JB |
876 | /* Close the standard input, standard output and standard error handles |
877 | in the parent. */ | |
878 | ||
ed20019d JB |
879 | _close (in); |
880 | _close (out); | |
881 | if (separate_stderr) | |
59cdf842 | 882 | _close (errdes); |
5a17353c DD |
883 | |
884 | return pid; | |
885 | } | |
886 | ||
b109e79a ILT |
887 | /* Wait for a child process to complete. MS CRTDLL doesn't return |
888 | enough information in status to decide if the child exited due to a | |
889 | signal or not, rather it simply returns an integer with the exit | |
890 | code of the child; eg., if the child exited with an abort() call | |
891 | and didn't have a handler for SIGABRT, it simply returns with | |
892 | status == 3. We fix the status code to conform to the usual WIF* | |
893 | macros. Note that WIFSIGNALED will never be true under CRTDLL. */ | |
894 | ||
587c6b96 | 895 | static pid_t |
29d89e07 | 896 | pex_win32_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, |
b109e79a ILT |
897 | int *status, struct pex_time *time, int done ATTRIBUTE_UNUSED, |
898 | const char **errmsg, int *err) | |
5a17353c | 899 | { |
8e1e9959 DD |
900 | DWORD termstat; |
901 | HANDLE h; | |
5a17353c | 902 | |
b109e79a ILT |
903 | if (time != NULL) |
904 | memset (time, 0, sizeof *time); | |
905 | ||
8e1e9959 DD |
906 | h = (HANDLE) pid; |
907 | ||
b109e79a ILT |
908 | /* FIXME: If done is non-zero, we should probably try to kill the |
909 | process. */ | |
8e1e9959 | 910 | if (WaitForSingleObject (h, INFINITE) != WAIT_OBJECT_0) |
b109e79a | 911 | { |
8e1e9959 DD |
912 | CloseHandle (h); |
913 | *err = ECHILD; | |
914 | *errmsg = "WaitForSingleObject"; | |
b109e79a ILT |
915 | return -1; |
916 | } | |
5a17353c | 917 | |
8e1e9959 DD |
918 | GetExitCodeProcess (h, &termstat); |
919 | CloseHandle (h); | |
920 | ||
921 | /* A value of 3 indicates that the child caught a signal, but not | |
922 | which one. Since only SIGABRT, SIGFPE and SIGINT do anything, we | |
923 | report SIGABRT. */ | |
5a17353c DD |
924 | if (termstat == 3) |
925 | *status = SIGABRT; | |
926 | else | |
8e1e9959 | 927 | *status = (termstat & 0xff) << 8; |
5a17353c | 928 | |
b109e79a ILT |
929 | return 0; |
930 | } | |
931 | ||
932 | /* Create a pipe. */ | |
933 | ||
934 | static int | |
935 | pex_win32_pipe (struct pex_obj *obj ATTRIBUTE_UNUSED, int *p, | |
936 | int binary) | |
937 | { | |
59cdf842 | 938 | return _pipe (p, 256, (binary ? _O_BINARY : _O_TEXT) | _O_NOINHERIT); |
b109e79a ILT |
939 | } |
940 | ||
941 | /* Get a FILE pointer to read from a file descriptor. */ | |
942 | ||
943 | static FILE * | |
944 | pex_win32_fdopenr (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, | |
945 | int binary) | |
946 | { | |
b69c3c55 KT |
947 | HANDLE h = (HANDLE) _get_osfhandle (fd); |
948 | if (h == INVALID_HANDLE_VALUE) | |
949 | return NULL; | |
950 | if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) | |
951 | return NULL; | |
b109e79a | 952 | return fdopen (fd, binary ? "rb" : "r"); |
5a17353c | 953 | } |
f59e96e0 | 954 | |
3db2e6dd DD |
955 | static FILE * |
956 | pex_win32_fdopenw (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, | |
957 | int binary) | |
958 | { | |
959 | HANDLE h = (HANDLE) _get_osfhandle (fd); | |
960 | if (h == INVALID_HANDLE_VALUE) | |
961 | return NULL; | |
962 | if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) | |
963 | return NULL; | |
964 | return fdopen (fd, binary ? "wb" : "w"); | |
965 | } | |
966 | ||
f59e96e0 DD |
967 | #ifdef MAIN |
968 | #include <stdio.h> | |
969 | ||
970 | int | |
971 | main (int argc ATTRIBUTE_UNUSED, char **argv) | |
972 | { | |
973 | char const *errmsg; | |
974 | int err; | |
975 | argv++; | |
29d89e07 | 976 | printf ("%ld\n", (long) pex_win32_exec_child (NULL, PEX_SEARCH, argv[0], argv, NULL, 0, 0, 1, 2, &errmsg, &err)); |
f59e96e0 DD |
977 | exit (0); |
978 | } | |
979 | #endif |