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 | 80 | static int pex_win32_open_read (struct pex_obj *, const char *, int); |
b55f9678 | 81 | static int pex_win32_open_write (struct pex_obj *, const char *, int, 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, | |
b55f9678 | 129 | int binary, int append) |
b109e79a ILT |
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. */ | |
b55f9678 IB |
133 | if (append) |
134 | return -1; | |
b109e79a ILT |
135 | return _open (name, |
136 | (_O_WRONLY | _O_CREAT | _O_TRUNC | |
137 | | (binary ? _O_BINARY : _O_TEXT)), | |
138 | _S_IREAD | _S_IWRITE); | |
139 | } | |
140 | ||
141 | /* Close a file. */ | |
142 | ||
143 | static int | |
144 | pex_win32_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd) | |
145 | { | |
146 | return _close (fd); | |
147 | } | |
148 | ||
f59e96e0 DD |
149 | #ifdef USE_MINGW_MSYS |
150 | static const char *mingw_keys[] = {"SOFTWARE", "Microsoft", "Windows", "CurrentVersion", "Uninstall", NULL}; | |
151 | ||
152 | /* Tack the executable on the end of a (possibly slash terminated) buffer | |
153 | and convert everything to \. */ | |
154 | static const char * | |
155 | tack_on_executable (char *buf, const char *executable) | |
156 | { | |
157 | char *p = strchr (buf, '\0'); | |
158 | if (p > buf && (p[-1] == '\\' || p[-1] == '/')) | |
159 | p[-1] = '\0'; | |
160 | backslashify (strcat (buf, executable)); | |
161 | return buf; | |
162 | } | |
163 | ||
164 | /* Walk down a registry hierarchy until the end. Return the key. */ | |
165 | static HKEY | |
166 | openkey (HKEY hStart, const char *keys[]) | |
167 | { | |
168 | HKEY hKey, hTmp; | |
169 | for (hKey = hStart; *keys; keys++) | |
170 | { | |
171 | LONG res; | |
172 | hTmp = hKey; | |
173 | res = RegOpenKey (hTmp, *keys, &hKey); | |
174 | ||
175 | if (hTmp != HKEY_LOCAL_MACHINE) | |
176 | RegCloseKey (hTmp); | |
177 | ||
178 | if (res != ERROR_SUCCESS) | |
179 | return NULL; | |
180 | } | |
181 | return hKey; | |
182 | } | |
183 | ||
184 | /* Return the "mingw root" as derived from the mingw uninstall information. */ | |
185 | static const char * | |
186 | mingw_rootify (const char *executable) | |
187 | { | |
188 | HKEY hKey, hTmp; | |
189 | DWORD maxlen; | |
190 | char *namebuf, *foundbuf; | |
191 | DWORD i; | |
192 | LONG res; | |
193 | ||
194 | /* Open the uninstall "directory". */ | |
195 | hKey = openkey (HKEY_LOCAL_MACHINE, mingw_keys); | |
196 | ||
197 | /* Not found. */ | |
198 | if (!hKey) | |
199 | return executable; | |
200 | ||
201 | /* Need to enumerate all of the keys here looking for one the most recent | |
202 | one for MinGW. */ | |
203 | if (RegQueryInfoKey (hKey, NULL, NULL, NULL, NULL, &maxlen, NULL, NULL, | |
204 | NULL, NULL, NULL, NULL) != ERROR_SUCCESS) | |
205 | { | |
206 | RegCloseKey (hKey); | |
207 | return executable; | |
208 | } | |
209 | namebuf = XNEWVEC (char, ++maxlen); | |
210 | foundbuf = XNEWVEC (char, maxlen); | |
211 | foundbuf[0] = '\0'; | |
212 | if (!namebuf || !foundbuf) | |
213 | { | |
214 | RegCloseKey (hKey); | |
4ff224cb DD |
215 | free (namebuf); |
216 | free (foundbuf); | |
f59e96e0 DD |
217 | return executable; |
218 | } | |
219 | ||
220 | /* Look through all of the keys for one that begins with Minimal GNU... | |
221 | Try to get the latest version by doing a string compare although that | |
222 | string never really works with version number sorting. */ | |
223 | for (i = 0; RegEnumKey (hKey, i, namebuf, maxlen) == ERROR_SUCCESS; i++) | |
224 | { | |
225 | int match = strcasecmp (namebuf, MINGW_NAME); | |
226 | if (match < 0) | |
227 | continue; | |
228 | if (match > 0 && strncasecmp (namebuf, MINGW_NAME, MINGW_NAME_LEN) > 0) | |
229 | continue; | |
230 | if (strcasecmp (namebuf, foundbuf) > 0) | |
231 | strcpy (foundbuf, namebuf); | |
232 | } | |
233 | free (namebuf); | |
234 | ||
235 | /* If foundbuf is empty, we didn't find anything. Punt. */ | |
236 | if (!foundbuf[0]) | |
237 | { | |
238 | free (foundbuf); | |
239 | RegCloseKey (hKey); | |
240 | return executable; | |
241 | } | |
242 | ||
243 | /* Open the key that we wanted */ | |
244 | res = RegOpenKey (hKey, foundbuf, &hTmp); | |
245 | RegCloseKey (hKey); | |
246 | free (foundbuf); | |
247 | ||
248 | /* Don't know why this would fail, but you gotta check */ | |
249 | if (res != ERROR_SUCCESS) | |
250 | return executable; | |
251 | ||
252 | maxlen = 0; | |
253 | /* Get the length of the value pointed to by InstallLocation */ | |
254 | if (RegQueryValueEx (hTmp, "InstallLocation", 0, NULL, NULL, | |
255 | &maxlen) != ERROR_SUCCESS || maxlen == 0) | |
256 | { | |
257 | RegCloseKey (hTmp); | |
258 | return executable; | |
259 | } | |
260 | ||
261 | /* Allocate space for the install location */ | |
262 | foundbuf = XNEWVEC (char, maxlen + strlen (executable)); | |
263 | if (!foundbuf) | |
264 | { | |
265 | free (foundbuf); | |
266 | RegCloseKey (hTmp); | |
267 | } | |
268 | ||
269 | /* Read the install location into the buffer */ | |
270 | res = RegQueryValueEx (hTmp, "InstallLocation", 0, NULL, (LPBYTE) foundbuf, | |
271 | &maxlen); | |
272 | RegCloseKey (hTmp); | |
273 | if (res != ERROR_SUCCESS) | |
274 | { | |
275 | free (foundbuf); | |
276 | return executable; | |
277 | } | |
278 | ||
279 | /* Concatenate the install location and the executable, turn all slashes | |
280 | to backslashes, and return that. */ | |
281 | return tack_on_executable (foundbuf, executable); | |
282 | } | |
283 | ||
284 | /* Read the install location of msys from it's installation file and | |
285 | rootify the executable based on that. */ | |
286 | static const char * | |
287 | msys_rootify (const char *executable) | |
288 | { | |
289 | size_t bufsize = 64; | |
290 | size_t execlen = strlen (executable) + 1; | |
291 | char *buf; | |
292 | DWORD res = 0; | |
293 | for (;;) | |
294 | { | |
295 | buf = XNEWVEC (char, bufsize + execlen); | |
296 | if (!buf) | |
297 | break; | |
298 | res = GetPrivateProfileString ("InstallSettings", "InstallPath", NULL, | |
299 | buf, bufsize, "msys.ini"); | |
300 | if (!res) | |
301 | break; | |
302 | if (strlen (buf) < bufsize) | |
303 | break; | |
304 | res = 0; | |
305 | free (buf); | |
306 | bufsize *= 2; | |
307 | if (bufsize > 65536) | |
308 | { | |
309 | buf = NULL; | |
310 | break; | |
311 | } | |
312 | } | |
313 | ||
314 | if (res) | |
315 | return tack_on_executable (buf, executable); | |
316 | ||
317 | /* failed */ | |
4ff224cb | 318 | free (buf); |
f59e96e0 DD |
319 | return executable; |
320 | } | |
321 | #endif | |
322 | ||
bd8aab1c DD |
323 | /* Return the number of arguments in an argv array, not including the null |
324 | terminating argument. */ | |
325 | ||
326 | static int | |
327 | argv_to_argc (char *const *argv) | |
328 | { | |
329 | char *const *i = argv; | |
330 | while (*i) | |
331 | i++; | |
332 | return i - argv; | |
333 | } | |
334 | ||
8e1e9959 DD |
335 | /* Return a Windows command-line from ARGV. It is the caller's |
336 | responsibility to free the string returned. */ | |
337 | ||
338 | static char * | |
339 | argv_to_cmdline (char *const *argv) | |
340 | { | |
341 | char *cmdline; | |
342 | char *p; | |
343 | size_t cmdline_len; | |
344 | int i, j, k; | |
f69123aa | 345 | int needs_quotes; |
8e1e9959 DD |
346 | |
347 | cmdline_len = 0; | |
348 | for (i = 0; argv[i]; i++) | |
349 | { | |
f69123aa KT |
350 | /* We only quote arguments that contain spaces, \t or " characters to |
351 | prevent wasting 2 chars per argument of the CreateProcess 32k char | |
352 | limit. We need only escape embedded double-quotes and immediately | |
8e1e9959 DD |
353 | preceeding backslash characters. A sequence of backslach characters |
354 | that is not follwed by a double quote character will not be | |
355 | escaped. */ | |
f69123aa | 356 | needs_quotes = 0; |
8e1e9959 DD |
357 | for (j = 0; argv[i][j]; j++) |
358 | { | |
f69123aa KT |
359 | if (argv[i][j] == ' ' || argv[i][j] == '\t' || argv[i][j] == '"') |
360 | { | |
361 | needs_quotes = 1; | |
362 | } | |
363 | ||
8e1e9959 DD |
364 | if (argv[i][j] == '"') |
365 | { | |
366 | /* Escape preceeding backslashes. */ | |
367 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
368 | cmdline_len++; | |
369 | /* Escape the qote character. */ | |
370 | cmdline_len++; | |
371 | } | |
372 | } | |
41f225de NC |
373 | if (j == 0) |
374 | needs_quotes = 1; | |
8e1e9959 DD |
375 | /* Trailing backslashes also need to be escaped because they will be |
376 | followed by the terminating quote. */ | |
f69123aa KT |
377 | if (needs_quotes) |
378 | { | |
379 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
380 | cmdline_len++; | |
381 | } | |
8e1e9959 | 382 | cmdline_len += j; |
f69123aa KT |
383 | /* for leading and trailing quotes and space */ |
384 | cmdline_len += needs_quotes * 2 + 1; | |
8e1e9959 | 385 | } |
3ac01eb2 | 386 | cmdline = XNEWVEC (char, cmdline_len); |
8e1e9959 DD |
387 | p = cmdline; |
388 | for (i = 0; argv[i]; i++) | |
389 | { | |
f69123aa KT |
390 | needs_quotes = 0; |
391 | for (j = 0; argv[i][j]; j++) | |
392 | { | |
393 | if (argv[i][j] == ' ' || argv[i][j] == '\t' || argv[i][j] == '"') | |
394 | { | |
395 | needs_quotes = 1; | |
396 | break; | |
397 | } | |
398 | } | |
41f225de NC |
399 | if (j == 0) |
400 | needs_quotes = 1; | |
f69123aa KT |
401 | |
402 | if (needs_quotes) | |
403 | { | |
404 | *p++ = '"'; | |
405 | } | |
8e1e9959 DD |
406 | for (j = 0; argv[i][j]; j++) |
407 | { | |
408 | if (argv[i][j] == '"') | |
409 | { | |
410 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
411 | *p++ = '\\'; | |
412 | *p++ = '\\'; | |
413 | } | |
414 | *p++ = argv[i][j]; | |
415 | } | |
f69123aa KT |
416 | if (needs_quotes) |
417 | { | |
418 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
419 | *p++ = '\\'; | |
420 | *p++ = '"'; | |
421 | } | |
8e1e9959 DD |
422 | *p++ = ' '; |
423 | } | |
424 | p[-1] = '\0'; | |
425 | return cmdline; | |
426 | } | |
427 | ||
fb347196 VP |
428 | /* We'll try the passed filename with all the known standard |
429 | extensions, and then without extension. We try no extension | |
430 | last so that we don't try to run some random extension-less | |
431 | file that might be hanging around. We try both extension | |
432 | and no extension so that we don't need any fancy logic | |
433 | to determine if a file has extension. */ | |
8e1e9959 DD |
434 | static const char *const |
435 | std_suffixes[] = { | |
436 | ".com", | |
437 | ".exe", | |
438 | ".bat", | |
439 | ".cmd", | |
8e1e9959 DD |
440 | "", |
441 | 0 | |
442 | }; | |
443 | ||
444 | /* Returns the full path to PROGRAM. If SEARCH is true, look for | |
445 | PROGRAM in each directory in PATH. */ | |
446 | ||
447 | static char * | |
448 | find_executable (const char *program, BOOL search) | |
449 | { | |
450 | char *full_executable; | |
451 | char *e; | |
452 | size_t fe_len; | |
453 | const char *path = 0; | |
454 | const char *const *ext; | |
455 | const char *p, *q; | |
456 | size_t proglen = strlen (program); | |
8e1e9959 DD |
457 | int has_slash = (strchr (program, '/') || strchr (program, '\\')); |
458 | HANDLE h; | |
459 | ||
460 | if (has_slash) | |
461 | search = FALSE; | |
462 | ||
463 | if (search) | |
464 | path = getenv ("PATH"); | |
465 | if (!path) | |
466 | path = ""; | |
467 | ||
468 | fe_len = 0; | |
469 | for (p = path; *p; p = q) | |
470 | { | |
471 | q = p; | |
472 | while (*q != ';' && *q != '\0') | |
473 | q++; | |
474 | if ((size_t)(q - p) > fe_len) | |
475 | fe_len = q - p; | |
476 | if (*q == ';') | |
477 | q++; | |
478 | } | |
fb347196 | 479 | fe_len = fe_len + 1 + proglen + 5 /* space for extension */; |
3ac01eb2 | 480 | full_executable = XNEWVEC (char, fe_len); |
8e1e9959 DD |
481 | |
482 | p = path; | |
483 | do | |
484 | { | |
485 | q = p; | |
486 | while (*q != ';' && *q != '\0') | |
487 | q++; | |
488 | ||
489 | e = full_executable; | |
490 | memcpy (e, p, q - p); | |
491 | e += (q - p); | |
492 | if (q - p) | |
493 | *e++ = '\\'; | |
494 | strcpy (e, program); | |
495 | ||
496 | if (*q == ';') | |
497 | q++; | |
498 | ||
499 | for (e = full_executable; *e; e++) | |
500 | if (*e == '/') | |
501 | *e = '\\'; | |
502 | ||
503 | /* At this point, e points to the terminating NUL character for | |
504 | full_executable. */ | |
fb347196 | 505 | for (ext = std_suffixes; *ext; ext++) |
8e1e9959 DD |
506 | { |
507 | /* Remove any current extension. */ | |
508 | *e = '\0'; | |
509 | /* Add the new one. */ | |
510 | strcat (full_executable, *ext); | |
511 | ||
512 | /* Attempt to open this file. */ | |
513 | h = CreateFile (full_executable, GENERIC_READ, | |
514 | FILE_SHARE_READ | FILE_SHARE_WRITE, | |
515 | 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); | |
516 | if (h != INVALID_HANDLE_VALUE) | |
517 | goto found; | |
518 | } | |
519 | p = q; | |
520 | } | |
521 | while (*p); | |
522 | free (full_executable); | |
523 | return 0; | |
524 | ||
525 | found: | |
526 | CloseHandle (h); | |
527 | return full_executable; | |
528 | } | |
529 | ||
014a8caf DD |
530 | /* Low-level process creation function and helper. */ |
531 | ||
532 | static int | |
533 | env_compare (const void *a_ptr, const void *b_ptr) | |
534 | { | |
535 | const char *a; | |
536 | const char *b; | |
537 | unsigned char c1; | |
538 | unsigned char c2; | |
539 | ||
540 | a = *(const char **) a_ptr; | |
541 | b = *(const char **) b_ptr; | |
542 | ||
543 | /* a and b will be of the form: VAR=VALUE | |
544 | We compare only the variable name part here using a case-insensitive | |
545 | comparison algorithm. It might appear that in fact strcasecmp () can | |
546 | take the place of this whole function, and indeed it could, save for | |
547 | the fact that it would fail in cases such as comparing A1=foo and | |
548 | A=bar (because 1 is less than = in the ASCII character set). | |
549 | (Environment variables containing no numbers would work in such a | |
550 | scenario.) */ | |
551 | ||
552 | do | |
553 | { | |
554 | c1 = (unsigned char) tolower (*a++); | |
555 | c2 = (unsigned char) tolower (*b++); | |
556 | ||
557 | if (c1 == '=') | |
558 | c1 = '\0'; | |
559 | ||
560 | if (c2 == '=') | |
561 | c2 = '\0'; | |
562 | } | |
563 | while (c1 == c2 && c1 != '\0'); | |
564 | ||
565 | return c1 - c2; | |
566 | } | |
8e1e9959 | 567 | |
bd8aab1c DD |
568 | /* Execute a Windows executable as a child process. This will fail if the |
569 | * target is not actually an executable, such as if it is a shell script. */ | |
570 | ||
29d89e07 | 571 | static pid_t |
8e1e9959 DD |
572 | win32_spawn (const char *executable, |
573 | BOOL search, | |
574 | char *const *argv, | |
014a8caf | 575 | char *const *env, /* array of strings of the form: VAR=VALUE */ |
8e1e9959 DD |
576 | DWORD dwCreationFlags, |
577 | LPSTARTUPINFO si, | |
578 | LPPROCESS_INFORMATION pi) | |
579 | { | |
580 | char *full_executable; | |
581 | char *cmdline; | |
014a8caf DD |
582 | char **env_copy; |
583 | char *env_block = NULL; | |
8e1e9959 DD |
584 | |
585 | full_executable = NULL; | |
586 | cmdline = NULL; | |
587 | ||
014a8caf DD |
588 | if (env) |
589 | { | |
590 | int env_size; | |
591 | ||
592 | /* Count the number of environment bindings supplied. */ | |
593 | for (env_size = 0; env[env_size]; env_size++) | |
594 | continue; | |
595 | ||
596 | /* Assemble an environment block, if required. This consists of | |
597 | VAR=VALUE strings juxtaposed (with one null character between each | |
598 | pair) and an additional null at the end. */ | |
599 | if (env_size > 0) | |
600 | { | |
601 | int var; | |
602 | int total_size = 1; /* 1 is for the final null. */ | |
603 | char *bufptr; | |
604 | ||
605 | /* Windows needs the members of the block to be sorted by variable | |
606 | name. */ | |
3ac01eb2 | 607 | env_copy = (char **) alloca (sizeof (char *) * env_size); |
014a8caf DD |
608 | memcpy (env_copy, env, sizeof (char *) * env_size); |
609 | qsort (env_copy, env_size, sizeof (char *), env_compare); | |
610 | ||
611 | for (var = 0; var < env_size; var++) | |
612 | total_size += strlen (env[var]) + 1; | |
613 | ||
3ac01eb2 | 614 | env_block = XNEWVEC (char, total_size); |
014a8caf DD |
615 | bufptr = env_block; |
616 | for (var = 0; var < env_size; var++) | |
617 | bufptr = stpcpy (bufptr, env_copy[var]) + 1; | |
618 | ||
619 | *bufptr = '\0'; | |
620 | } | |
621 | } | |
622 | ||
8e1e9959 DD |
623 | full_executable = find_executable (executable, search); |
624 | if (!full_executable) | |
625 | goto error; | |
626 | cmdline = argv_to_cmdline (argv); | |
627 | if (!cmdline) | |
628 | goto error; | |
629 | ||
630 | /* Create the child process. */ | |
631 | if (!CreateProcess (full_executable, cmdline, | |
632 | /*lpProcessAttributes=*/NULL, | |
633 | /*lpThreadAttributes=*/NULL, | |
634 | /*bInheritHandles=*/TRUE, | |
635 | dwCreationFlags, | |
014a8caf | 636 | (LPVOID) env_block, |
8e1e9959 DD |
637 | /*lpCurrentDirectory=*/NULL, |
638 | si, | |
639 | pi)) | |
640 | { | |
4ff224cb | 641 | free (env_block); |
014a8caf | 642 | |
8e1e9959 | 643 | free (full_executable); |
014a8caf | 644 | |
29d89e07 | 645 | return (pid_t) -1; |
8e1e9959 DD |
646 | } |
647 | ||
648 | /* Clean up. */ | |
649 | CloseHandle (pi->hThread); | |
650 | free (full_executable); | |
4ff224cb | 651 | free (env_block); |
8e1e9959 | 652 | |
29d89e07 | 653 | return (pid_t) pi->hProcess; |
8e1e9959 DD |
654 | |
655 | error: | |
4ff224cb DD |
656 | free (env_block); |
657 | free (cmdline); | |
658 | free (full_executable); | |
014a8caf | 659 | |
29d89e07 | 660 | return (pid_t) -1; |
8e1e9959 DD |
661 | } |
662 | ||
bd8aab1c DD |
663 | /* Spawn a script. This simulates the Unix script execution mechanism. |
664 | This function is called as a fallback if win32_spawn fails. */ | |
665 | ||
29d89e07 | 666 | static pid_t |
8e1e9959 | 667 | spawn_script (const char *executable, char *const *argv, |
014a8caf | 668 | char* const *env, |
8e1e9959 DD |
669 | DWORD dwCreationFlags, |
670 | LPSTARTUPINFO si, | |
671 | LPPROCESS_INFORMATION pi) | |
f59e96e0 | 672 | { |
29d89e07 | 673 | pid_t pid = (pid_t) -1; |
f59e96e0 DD |
674 | int save_errno = errno; |
675 | int fd = _open (executable, _O_RDONLY); | |
676 | ||
bd8aab1c DD |
677 | /* Try to open script, check header format, extract interpreter path, |
678 | and spawn script using that interpretter. */ | |
f59e96e0 DD |
679 | if (fd >= 0) |
680 | { | |
681 | char buf[MAX_PATH + 5]; | |
682 | int len = _read (fd, buf, sizeof (buf) - 1); | |
683 | _close (fd); | |
684 | if (len > 3) | |
685 | { | |
686 | char *eol; | |
687 | buf[len] = '\0'; | |
688 | eol = strchr (buf, '\n'); | |
689 | if (eol && strncmp (buf, "#!", 2) == 0) | |
690 | { | |
bd8aab1c DD |
691 | |
692 | /* Header format is OK. */ | |
f59e96e0 | 693 | char *executable1; |
bd8aab1c DD |
694 | int new_argc; |
695 | const char **avhere; | |
696 | ||
697 | /* Extract interpreter path. */ | |
f59e96e0 DD |
698 | do |
699 | *eol = '\0'; | |
700 | while (*--eol == '\r' || *eol == ' ' || *eol == '\t'); | |
701 | for (executable1 = buf + 2; *executable1 == ' ' || *executable1 == '\t'; executable1++) | |
702 | continue; | |
f59e96e0 | 703 | backslashify (executable1); |
bd8aab1c DD |
704 | |
705 | /* Duplicate argv, prepending the interpreter path. */ | |
706 | new_argc = argv_to_argc (argv) + 1; | |
707 | avhere = XNEWVEC (const char *, new_argc + 1); | |
f59e96e0 | 708 | *avhere = executable1; |
bd8aab1c DD |
709 | memcpy (avhere + 1, argv, new_argc * sizeof(*argv)); |
710 | argv = (char *const *)avhere; | |
711 | ||
712 | /* Spawn the child. */ | |
f59e96e0 DD |
713 | #ifndef USE_MINGW_MSYS |
714 | executable = strrchr (executable1, '\\') + 1; | |
715 | if (!executable) | |
716 | executable = executable1; | |
014a8caf | 717 | pid = win32_spawn (executable, TRUE, argv, env, |
8e1e9959 | 718 | dwCreationFlags, si, pi); |
f59e96e0 DD |
719 | #else |
720 | if (strchr (executable1, '\\') == NULL) | |
014a8caf | 721 | pid = win32_spawn (executable1, TRUE, argv, env, |
8e1e9959 | 722 | dwCreationFlags, si, pi); |
f59e96e0 | 723 | else if (executable1[0] != '\\') |
014a8caf | 724 | pid = win32_spawn (executable1, FALSE, argv, env, |
8e1e9959 | 725 | dwCreationFlags, si, pi); |
f59e96e0 DD |
726 | else |
727 | { | |
728 | const char *newex = mingw_rootify (executable1); | |
729 | *avhere = newex; | |
014a8caf | 730 | pid = win32_spawn (newex, FALSE, argv, env, |
8e1e9959 | 731 | dwCreationFlags, si, pi); |
f59e96e0 DD |
732 | if (executable1 != newex) |
733 | free ((char *) newex); | |
587c6b96 | 734 | if (pid == (pid_t) -1) |
f59e96e0 DD |
735 | { |
736 | newex = msys_rootify (executable1); | |
737 | if (newex != executable1) | |
738 | { | |
739 | *avhere = newex; | |
014a8caf | 740 | pid = win32_spawn (newex, FALSE, argv, env, |
8e1e9959 | 741 | dwCreationFlags, si, pi); |
f59e96e0 DD |
742 | free ((char *) newex); |
743 | } | |
744 | } | |
745 | } | |
746 | #endif | |
bd8aab1c | 747 | free (avhere); |
f59e96e0 DD |
748 | } |
749 | } | |
750 | } | |
587c6b96 | 751 | if (pid == (pid_t) -1) |
f59e96e0 DD |
752 | errno = save_errno; |
753 | return pid; | |
754 | } | |
755 | ||
b109e79a ILT |
756 | /* Execute a child. */ |
757 | ||
29d89e07 | 758 | static pid_t |
b109e79a ILT |
759 | pex_win32_exec_child (struct pex_obj *obj ATTRIBUTE_UNUSED, int flags, |
760 | const char *executable, char * const * argv, | |
014a8caf | 761 | char* const* env, |
cb6c09ac DD |
762 | int in, int out, int errdes, |
763 | int toclose ATTRIBUTE_UNUSED, | |
764 | const char **errmsg, | |
b109e79a ILT |
765 | int *err) |
766 | { | |
29d89e07 | 767 | pid_t pid; |
8e1e9959 DD |
768 | HANDLE stdin_handle; |
769 | HANDLE stdout_handle; | |
770 | HANDLE stderr_handle; | |
771 | DWORD dwCreationFlags; | |
772 | OSVERSIONINFO version_info; | |
773 | STARTUPINFO si; | |
774 | PROCESS_INFORMATION pi; | |
59cdf842 JB |
775 | int orig_out, orig_in, orig_err; |
776 | BOOL separate_stderr = !(flags & PEX_STDERR_TO_STDOUT); | |
777 | ||
9974286e | 778 | /* Ensure we have inheritable descriptors to pass to the child. */ |
59cdf842 JB |
779 | orig_in = in; |
780 | in = _dup (orig_in); | |
59cdf842 JB |
781 | |
782 | orig_out = out; | |
783 | out = _dup (orig_out); | |
59cdf842 JB |
784 | |
785 | if (separate_stderr) | |
786 | { | |
787 | orig_err = errdes; | |
788 | errdes = _dup (orig_err); | |
59cdf842 | 789 | } |
8e1e9959 DD |
790 | |
791 | stdin_handle = INVALID_HANDLE_VALUE; | |
792 | stdout_handle = INVALID_HANDLE_VALUE; | |
793 | stderr_handle = INVALID_HANDLE_VALUE; | |
794 | ||
795 | stdin_handle = (HANDLE) _get_osfhandle (in); | |
796 | stdout_handle = (HANDLE) _get_osfhandle (out); | |
59cdf842 | 797 | if (separate_stderr) |
8e1e9959 DD |
798 | stderr_handle = (HANDLE) _get_osfhandle (errdes); |
799 | else | |
800 | stderr_handle = stdout_handle; | |
801 | ||
802 | /* Determine the version of Windows we are running on. */ | |
803 | version_info.dwOSVersionInfoSize = sizeof (version_info); | |
804 | GetVersionEx (&version_info); | |
805 | if (version_info.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) | |
806 | /* On Windows 95/98/ME the CREATE_NO_WINDOW flag is not | |
807 | supported, so we cannot avoid creating a console window. */ | |
808 | dwCreationFlags = 0; | |
809 | else | |
5a17353c | 810 | { |
8e1e9959 DD |
811 | HANDLE conout_handle; |
812 | ||
813 | /* Determine whether or not we have an associated console. */ | |
814 | conout_handle = CreateFile("CONOUT$", | |
815 | GENERIC_WRITE, | |
816 | FILE_SHARE_WRITE, | |
817 | /*lpSecurityAttributes=*/NULL, | |
818 | OPEN_EXISTING, | |
819 | FILE_ATTRIBUTE_NORMAL, | |
820 | /*hTemplateFile=*/NULL); | |
821 | if (conout_handle == INVALID_HANDLE_VALUE) | |
822 | /* There is no console associated with this process. Since | |
823 | the child is a console process, the OS would normally | |
824 | create a new console Window for the child. Since we'll be | |
825 | redirecting the child's standard streams, we do not need | |
826 | the console window. */ | |
827 | dwCreationFlags = CREATE_NO_WINDOW; | |
828 | else | |
b109e79a | 829 | { |
8e1e9959 DD |
830 | /* There is a console associated with the process, so the OS |
831 | will not create a new console. And, if we use | |
832 | CREATE_NO_WINDOW in this situation, the child will have | |
833 | no associated console. Therefore, if the child's | |
834 | standard streams are connected to the console, the output | |
835 | will be discarded. */ | |
836 | CloseHandle(conout_handle); | |
837 | dwCreationFlags = 0; | |
b109e79a | 838 | } |
5a17353c DD |
839 | } |
840 | ||
8e1e9959 DD |
841 | /* Since the child will be a console process, it will, by default, |
842 | connect standard input/output to its console. However, we want | |
843 | the child to use the handles specifically designated above. In | |
844 | addition, if there is no console (such as when we are running in | |
845 | a Cygwin X window), then we must redirect the child's | |
846 | input/output, as there is no console for the child to use. */ | |
847 | memset (&si, 0, sizeof (si)); | |
848 | si.cb = sizeof (si); | |
849 | si.dwFlags = STARTF_USESTDHANDLES; | |
850 | si.hStdInput = stdin_handle; | |
851 | si.hStdOutput = stdout_handle; | |
852 | si.hStdError = stderr_handle; | |
853 | ||
854 | /* Create the child process. */ | |
855 | pid = win32_spawn (executable, (flags & PEX_SEARCH) != 0, | |
014a8caf | 856 | argv, env, dwCreationFlags, &si, &pi); |
29d89e07 | 857 | if (pid == (pid_t) -1) |
014a8caf DD |
858 | pid = spawn_script (executable, argv, env, dwCreationFlags, |
859 | &si, &pi); | |
29d89e07 | 860 | if (pid == (pid_t) -1) |
5a17353c | 861 | { |
8e1e9959 DD |
862 | *err = ENOENT; |
863 | *errmsg = "CreateProcess"; | |
5a17353c DD |
864 | } |
865 | ||
9974286e DD |
866 | /* If the child was created successfully, close the original file |
867 | descriptors. If the process creation fails, these are closed by | |
868 | pex_run_in_environment instead. We must not close them twice as | |
869 | that seems to cause a Windows exception. */ | |
870 | ||
871 | if (pid != (pid_t) -1) | |
872 | { | |
873 | if (orig_in != STDIN_FILENO) | |
874 | _close (orig_in); | |
875 | if (orig_out != STDOUT_FILENO) | |
876 | _close (orig_out); | |
877 | if (separate_stderr | |
878 | && orig_err != STDERR_FILENO) | |
879 | _close (orig_err); | |
880 | } | |
881 | ||
59cdf842 JB |
882 | /* Close the standard input, standard output and standard error handles |
883 | in the parent. */ | |
884 | ||
ed20019d JB |
885 | _close (in); |
886 | _close (out); | |
887 | if (separate_stderr) | |
59cdf842 | 888 | _close (errdes); |
5a17353c DD |
889 | |
890 | return pid; | |
891 | } | |
892 | ||
b109e79a ILT |
893 | /* Wait for a child process to complete. MS CRTDLL doesn't return |
894 | enough information in status to decide if the child exited due to a | |
895 | signal or not, rather it simply returns an integer with the exit | |
896 | code of the child; eg., if the child exited with an abort() call | |
897 | and didn't have a handler for SIGABRT, it simply returns with | |
898 | status == 3. We fix the status code to conform to the usual WIF* | |
899 | macros. Note that WIFSIGNALED will never be true under CRTDLL. */ | |
900 | ||
587c6b96 | 901 | static pid_t |
29d89e07 | 902 | pex_win32_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, |
b109e79a ILT |
903 | int *status, struct pex_time *time, int done ATTRIBUTE_UNUSED, |
904 | const char **errmsg, int *err) | |
5a17353c | 905 | { |
8e1e9959 DD |
906 | DWORD termstat; |
907 | HANDLE h; | |
5a17353c | 908 | |
b109e79a ILT |
909 | if (time != NULL) |
910 | memset (time, 0, sizeof *time); | |
911 | ||
8e1e9959 DD |
912 | h = (HANDLE) pid; |
913 | ||
b109e79a ILT |
914 | /* FIXME: If done is non-zero, we should probably try to kill the |
915 | process. */ | |
8e1e9959 | 916 | if (WaitForSingleObject (h, INFINITE) != WAIT_OBJECT_0) |
b109e79a | 917 | { |
8e1e9959 DD |
918 | CloseHandle (h); |
919 | *err = ECHILD; | |
920 | *errmsg = "WaitForSingleObject"; | |
b109e79a ILT |
921 | return -1; |
922 | } | |
5a17353c | 923 | |
8e1e9959 DD |
924 | GetExitCodeProcess (h, &termstat); |
925 | CloseHandle (h); | |
926 | ||
927 | /* A value of 3 indicates that the child caught a signal, but not | |
928 | which one. Since only SIGABRT, SIGFPE and SIGINT do anything, we | |
929 | report SIGABRT. */ | |
5a17353c DD |
930 | if (termstat == 3) |
931 | *status = SIGABRT; | |
932 | else | |
8e1e9959 | 933 | *status = (termstat & 0xff) << 8; |
5a17353c | 934 | |
b109e79a ILT |
935 | return 0; |
936 | } | |
937 | ||
938 | /* Create a pipe. */ | |
939 | ||
940 | static int | |
941 | pex_win32_pipe (struct pex_obj *obj ATTRIBUTE_UNUSED, int *p, | |
942 | int binary) | |
943 | { | |
59cdf842 | 944 | return _pipe (p, 256, (binary ? _O_BINARY : _O_TEXT) | _O_NOINHERIT); |
b109e79a ILT |
945 | } |
946 | ||
947 | /* Get a FILE pointer to read from a file descriptor. */ | |
948 | ||
949 | static FILE * | |
950 | pex_win32_fdopenr (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, | |
951 | int binary) | |
952 | { | |
b69c3c55 KT |
953 | HANDLE h = (HANDLE) _get_osfhandle (fd); |
954 | if (h == INVALID_HANDLE_VALUE) | |
955 | return NULL; | |
956 | if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) | |
957 | return NULL; | |
b109e79a | 958 | return fdopen (fd, binary ? "rb" : "r"); |
5a17353c | 959 | } |
f59e96e0 | 960 | |
3db2e6dd DD |
961 | static FILE * |
962 | pex_win32_fdopenw (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, | |
963 | int binary) | |
964 | { | |
965 | HANDLE h = (HANDLE) _get_osfhandle (fd); | |
966 | if (h == INVALID_HANDLE_VALUE) | |
967 | return NULL; | |
968 | if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) | |
969 | return NULL; | |
970 | return fdopen (fd, binary ? "wb" : "w"); | |
971 | } | |
972 | ||
f59e96e0 DD |
973 | #ifdef MAIN |
974 | #include <stdio.h> | |
975 | ||
976 | int | |
977 | main (int argc ATTRIBUTE_UNUSED, char **argv) | |
978 | { | |
979 | char const *errmsg; | |
980 | int err; | |
981 | argv++; | |
29d89e07 | 982 | printf ("%ld\n", (long) pex_win32_exec_child (NULL, PEX_SEARCH, argv[0], argv, NULL, 0, 0, 1, 2, &errmsg, &err)); |
f59e96e0 DD |
983 | exit (0); |
984 | } | |
985 | #endif |