1 /* Definitions for POSIX spawn interface.
2 Copyright (C) 2000, 2003, 2004, 2008-2009 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 @PRAGMA_SYSTEM_HEADER@
24 /* The include_next requires a split double-inclusion guard. */
26 # @INCLUDE_NEXT@ @NEXT_SPAWN_H@
34 #include <sys/types.h>
40 /* GCC 2.95 and later have "__restrict"; C99 compilers have
41 "restrict", and "configure" may have defined "restrict".
42 Other compilers use __restrict, __restrict__, and _Restrict, and
43 'configure' might #define 'restrict' to those words, so pick a
46 # if 199901L <= __STDC_VERSION__
47 # define _Restrict_ restrict
48 # elif 2 < __GNUC__ || (2 == __GNUC__ && 95 <= __GNUC_MINOR__)
49 # define _Restrict_ __restrict
54 /* gcc 3.1 and up support the [restrict] syntax. Don't trust
55 sys/cdefs.h's definition of __restrict_arr, though, as it
56 mishandles gcc -ansi -pedantic. */
57 #ifndef _Restrict_arr_
58 # if ((199901L <= __STDC_VERSION__ \
59 || ((3 < __GNUC__ || (3 == __GNUC__ && 1 <= __GNUC_MINOR__)) \
60 && !__STRICT_ANSI__)) \
62 # define _Restrict_arr_ _Restrict_
64 # define _Restrict_arr_
68 /* The definition of GL_LINK_WARNING is copied here. */
70 /* The definition of _GL_ARG_NONNULL is copied here. */
73 /* Data structure to contain attributes for thread creation. */
74 #if @REPLACE_POSIX_SPAWN@
75 # define posix_spawnattr_t rpl_posix_spawnattr_t
77 #if @REPLACE_POSIX_SPAWN@ || !@HAVE_POSIX_SPAWNATTR_T@
84 struct sched_param _sp;
91 /* Data structure to contain information about the actions to be
92 performed in the new process with respect to file descriptors. */
93 #if @REPLACE_POSIX_SPAWN@
94 # define posix_spawn_file_actions_t rpl_posix_spawn_file_actions_t
96 #if @REPLACE_POSIX_SPAWN@ || !@HAVE_POSIX_SPAWN_FILE_ACTIONS_T@
101 struct __spawn_action *_actions;
103 } posix_spawn_file_actions_t;
107 /* Flags to be set in the `posix_spawnattr_t'. */
108 #if @REPLACE_POSIX_SPAWN@
109 /* Use the values from the system, for better compatibility. */
110 /* But this implementation does not support AIX extensions. */
111 # undef POSIX_SPAWN_FORK_HANDLERS
113 # define POSIX_SPAWN_RESETIDS 0x01
114 # define POSIX_SPAWN_SETPGROUP 0x02
115 # define POSIX_SPAWN_SETSIGDEF 0x04
116 # define POSIX_SPAWN_SETSIGMASK 0x08
117 # define POSIX_SPAWN_SETSCHEDPARAM 0x10
118 # define POSIX_SPAWN_SETSCHEDULER 0x20
120 /* A GNU extension. Use the next free bit position. */
121 #define POSIX_SPAWN_USEVFORK \
122 ((POSIX_SPAWN_RESETIDS | (POSIX_SPAWN_RESETIDS - 1) \
123 | POSIX_SPAWN_SETPGROUP | (POSIX_SPAWN_SETPGROUP - 1) \
124 | POSIX_SPAWN_SETSIGDEF | (POSIX_SPAWN_SETSIGDEF - 1) \
125 | POSIX_SPAWN_SETSIGMASK | (POSIX_SPAWN_SETSIGMASK - 1) \
126 | POSIX_SPAWN_SETSCHEDPARAM | (POSIX_SPAWN_SETSCHEDPARAM - 1) \
127 | POSIX_SPAWN_SETSCHEDULER | (POSIX_SPAWN_SETSCHEDULER - 1)) \
129 typedef int verify_POSIX_SPAWN_USEVFORK_no_overlap
130 [2 * (((POSIX_SPAWN_RESETIDS | POSIX_SPAWN_SETPGROUP
131 | POSIX_SPAWN_SETSIGDEF | POSIX_SPAWN_SETSIGMASK
132 | POSIX_SPAWN_SETSCHEDPARAM | POSIX_SPAWN_SETSCHEDULER)
133 & POSIX_SPAWN_USEVFORK) == 0) - 1];
141 #if @GNULIB_POSIX_SPAWN@
142 /* Spawn a new process executing PATH with the attributes describes in *ATTRP.
143 Before running the process perform the actions described in FILE-ACTIONS.
145 This function is a possible cancellation points and therefore not
146 marked with __THROW. */
147 # if @REPLACE_POSIX_SPAWN@
148 # define posix_spawn rpl_posix_spawn
150 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
151 extern int posix_spawn (pid_t *_Restrict_ __pid,
152 const char *_Restrict_ __path,
153 const posix_spawn_file_actions_t *_Restrict_ __file_actions,
154 const posix_spawnattr_t *_Restrict_ __attrp,
155 char *const argv[_Restrict_arr_],
156 char *const envp[_Restrict_arr_])
157 _GL_ARG_NONNULL ((2, 5, 6));
159 #elif defined GNULIB_POSIXCHECK
161 # define posix_spawn(a,b,c,d,e,f) \
162 (GL_LINK_WARNING ("posix_spawn is unportable - " \
163 "use gnulib module posix_spawn for portability"), \
164 posix_spawn (a, b, c, d, e, f))
167 #if @GNULIB_POSIX_SPAWNP@
168 /* Similar to `posix_spawn' but search for FILE in the PATH.
170 This function is a possible cancellation points and therefore not
171 marked with __THROW. */
172 # if @REPLACE_POSIX_SPAWN@
173 # define posix_spawnp rpl_posix_spawnp
175 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
176 extern int posix_spawnp (pid_t *__pid, const char *__file,
177 const posix_spawn_file_actions_t *__file_actions,
178 const posix_spawnattr_t *__attrp,
179 char *const argv[], char *const envp[])
180 _GL_ARG_NONNULL ((2, 5, 6));
182 #elif defined GNULIB_POSIXCHECK
184 # define posix_spawnp(a,b,c,d,e,f) \
185 (GL_LINK_WARNING ("posix_spawnp is unportable - " \
186 "use gnulib module posix_spawnp for portability"), \
187 posix_spawnp (a, b, c, d, e, f))
191 #if @GNULIB_POSIX_SPAWNATTR_INIT@
192 /* Initialize data structure with attributes for `spawn' to default values. */
193 # if @REPLACE_POSIX_SPAWN@
194 # define posix_spawnattr_init rpl_posix_spawnattr_init
196 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
197 extern int posix_spawnattr_init (posix_spawnattr_t *__attr)
198 __THROW _GL_ARG_NONNULL ((1));
200 #elif defined GNULIB_POSIXCHECK
201 # undef posix_spawnattr_init
202 # define posix_spawnattr_init(a) \
203 (GL_LINK_WARNING ("posix_spawnattr_init is unportable - " \
204 "use gnulib module posix_spawnattr_init for portability"), \
205 posix_spawnattr_init (a))
208 #if @GNULIB_POSIX_SPAWNATTR_DESTROY@
209 /* Free resources associated with ATTR. */
210 # if @REPLACE_POSIX_SPAWN@
211 # define posix_spawnattr_destroy rpl_posix_spawnattr_destroy
213 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
214 extern int posix_spawnattr_destroy (posix_spawnattr_t *__attr)
215 __THROW _GL_ARG_NONNULL ((1));
217 #elif defined GNULIB_POSIXCHECK
218 # undef posix_spawnattr_destroy
219 # define posix_spawnattr_destroy(a) \
220 (GL_LINK_WARNING ("posix_spawnattr_destroy is unportable - " \
221 "use gnulib module posix_spawnattr_destroy for portability"), \
222 posix_spawnattr_destroy (a))
225 #if @GNULIB_POSIX_SPAWNATTR_GETSIGDEFAULT@
226 /* Store signal mask for signals with default handling from ATTR in
228 # if @REPLACE_POSIX_SPAWN@
229 # define posix_spawnattr_getsigdefault rpl_posix_spawnattr_getsigdefault
231 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
232 extern int posix_spawnattr_getsigdefault (const posix_spawnattr_t *_Restrict_ __attr,
233 sigset_t *_Restrict_ __sigdefault)
234 __THROW _GL_ARG_NONNULL ((1, 2));
236 #elif defined GNULIB_POSIXCHECK
237 # undef posix_spawnattr_getsigdefault
238 # define posix_spawnattr_getsigdefault(a, b) \
239 (GL_LINK_WARNING ("posix_spawnattr_getsigdefault is unportable - " \
240 "use gnulib module posix_spawnattr_getsigdefault for portability"), \
241 posix_spawnattr_getsigdefault (a, b))
244 #if @GNULIB_POSIX_SPAWNATTR_SETSIGDEFAULT@
245 /* Set signal mask for signals with default handling in ATTR to SIGDEFAULT. */
246 # if @REPLACE_POSIX_SPAWN@
247 # define posix_spawnattr_setsigdefault rpl_posix_spawnattr_setsigdefault
249 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
250 extern int posix_spawnattr_setsigdefault (posix_spawnattr_t *_Restrict_ __attr,
251 const sigset_t *_Restrict_ __sigdefault)
252 __THROW _GL_ARG_NONNULL ((1, 2));
254 #elif defined GNULIB_POSIXCHECK
255 # undef posix_spawnattr_setsigdefault
256 # define posix_spawnattr_setsigdefault(a, b) \
257 (GL_LINK_WARNING ("posix_spawnattr_setsigdefault is unportable - " \
258 "use gnulib module posix_spawnattr_setsigdefault for portability"), \
259 posix_spawnattr_setsigdefault (a, b))
262 #if @GNULIB_POSIX_SPAWNATTR_GETSIGMASK@
263 /* Store signal mask for the new process from ATTR in SIGMASK. */
264 # if @REPLACE_POSIX_SPAWN@
265 # define posix_spawnattr_getsigmask rpl_posix_spawnattr_getsigmask
267 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
268 extern int posix_spawnattr_getsigmask (const posix_spawnattr_t *_Restrict_ __attr,
269 sigset_t *_Restrict_ __sigmask)
270 __THROW _GL_ARG_NONNULL ((1, 2));
272 #elif defined GNULIB_POSIXCHECK
273 # undef posix_spawnattr_getsigmask
274 # define posix_spawnattr_getsigmask(a, b) \
275 (GL_LINK_WARNING ("posix_spawnattr_getsigmask is unportable - " \
276 "use gnulib module posix_spawnattr_getsigmask for portability"), \
277 posix_spawnattr_getsigmask (a, b))
280 #if @GNULIB_POSIX_SPAWNATTR_SETSIGMASK@
281 /* Set signal mask for the new process in ATTR to SIGMASK. */
282 # if @REPLACE_POSIX_SPAWN@
283 # define posix_spawnattr_setsigmask rpl_posix_spawnattr_setsigmask
285 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
286 extern int posix_spawnattr_setsigmask (posix_spawnattr_t *_Restrict_ __attr,
287 const sigset_t *_Restrict_ __sigmask)
288 __THROW _GL_ARG_NONNULL ((1, 2));
290 #elif defined GNULIB_POSIXCHECK
291 # undef posix_spawnattr_setsigmask
292 # define posix_spawnattr_setsigmask(a, b) \
293 (GL_LINK_WARNING ("posix_spawnattr_setsigmask is unportable - " \
294 "use gnulib module posix_spawnattr_setsigmask for portability"), \
295 posix_spawnattr_setsigmask (a, b))
298 #if @GNULIB_POSIX_SPAWNATTR_GETFLAGS@
299 /* Get flag word from the attribute structure. */
300 # if @REPLACE_POSIX_SPAWN@
301 # define posix_spawnattr_getflags rpl_posix_spawnattr_getflags
303 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
304 extern int posix_spawnattr_getflags (const posix_spawnattr_t *_Restrict_ __attr,
305 short int *_Restrict_ __flags)
306 __THROW _GL_ARG_NONNULL ((1, 2));
308 #elif defined GNULIB_POSIXCHECK
309 # undef posix_spawnattr_getflags
310 # define posix_spawnattr_getflags(a, b) \
311 (GL_LINK_WARNING ("posix_spawnattr_getflags is unportable - " \
312 "use gnulib module posix_spawnattr_getflags for portability"), \
313 posix_spawnattr_getsigdefault (a, b))
316 #if @GNULIB_POSIX_SPAWNATTR_SETFLAGS@
317 /* Store flags in the attribute structure. */
318 # if @REPLACE_POSIX_SPAWN@
319 # define posix_spawnattr_setflags rpl_posix_spawnattr_setflags
321 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
322 extern int posix_spawnattr_setflags (posix_spawnattr_t *__attr,
324 __THROW _GL_ARG_NONNULL ((1));
326 #elif defined GNULIB_POSIXCHECK
327 # undef posix_spawnattr_setflags
328 # define posix_spawnattr_setflags(a, b) \
329 (GL_LINK_WARNING ("posix_spawnattr_setflags is unportable - " \
330 "use gnulib module posix_spawnattr_setflags for portability"), \
331 posix_spawnattr_getflags (a, b))
334 #if @GNULIB_POSIX_SPAWNATTR_GETPGROUP@
335 /* Get process group ID from the attribute structure. */
336 # if @REPLACE_POSIX_SPAWN@
337 # define posix_spawnattr_getpgroup rpl_posix_spawnattr_getpgroup
339 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
340 extern int posix_spawnattr_getpgroup (const posix_spawnattr_t *_Restrict_ __attr,
341 pid_t *_Restrict_ __pgroup)
342 __THROW _GL_ARG_NONNULL ((1, 2));
344 #elif defined GNULIB_POSIXCHECK
345 # undef posix_spawnattr_getpgroup
346 # define posix_spawnattr_getpgroup(a, b) \
347 (GL_LINK_WARNING ("posix_spawnattr_getpgroup is unportable - " \
348 "use gnulib module posix_spawnattr_getpgroup for portability"), \
349 posix_spawnattr_setflags (a, b))
352 #if @GNULIB_POSIX_SPAWNATTR_SETPGROUP@
353 /* Store process group ID in the attribute structure. */
354 # if @REPLACE_POSIX_SPAWN@
355 # define posix_spawnattr_setpgroup rpl_posix_spawnattr_setpgroup
357 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
358 extern int posix_spawnattr_setpgroup (posix_spawnattr_t *__attr,
360 __THROW _GL_ARG_NONNULL ((1));
362 #elif defined GNULIB_POSIXCHECK
363 # undef posix_spawnattr_setpgroup
364 # define posix_spawnattr_setpgroup(a, b) \
365 (GL_LINK_WARNING ("posix_spawnattr_setpgroup is unportable - " \
366 "use gnulib module posix_spawnattr_setpgroup for portability"), \
367 posix_spawnattr_setflags (a, b))
370 #if @GNULIB_POSIX_SPAWNATTR_GETSCHEDPOLICY@
371 /* Get scheduling policy from the attribute structure. */
372 # if @REPLACE_POSIX_SPAWN@
373 # define posix_spawnattr_getschedpolicy rpl_posix_spawnattr_getschedpolicy
375 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
376 extern int posix_spawnattr_getschedpolicy (const posix_spawnattr_t *_Restrict_ __attr,
377 int *_Restrict_ __schedpolicy)
378 __THROW _GL_ARG_NONNULL ((1, 2));
380 #elif defined GNULIB_POSIXCHECK
381 # undef posix_spawnattr_getschedpolicy
382 # define posix_spawnattr_getschedpolicy(a, b) \
383 (GL_LINK_WARNING ("posix_spawnattr_getschedpolicy is unportable - " \
384 "use gnulib module posix_spawnattr_getschedpolicy for portability"), \
385 posix_spawnattr_getschedpolicy (a, b))
388 #if @GNULIB_POSIX_SPAWNATTR_SETSCHEDPOLICY@
389 /* Store scheduling policy in the attribute structure. */
390 # if @REPLACE_POSIX_SPAWN@
391 # define posix_spawnattr_setschedpolicy rpl_posix_spawnattr_setschedpolicy
393 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
394 extern int posix_spawnattr_setschedpolicy (posix_spawnattr_t *__attr,
396 __THROW _GL_ARG_NONNULL ((1));
398 #elif defined GNULIB_POSIXCHECK
399 # undef posix_spawnattr_setschedpolicy
400 # define posix_spawnattr_setschedpolicy(a, b) \
401 (GL_LINK_WARNING ("posix_spawnattr_setschedpolicy is unportable - " \
402 "use gnulib module posix_spawnattr_setschedpolicy for portability"), \
403 posix_spawnattr_setschedpolicy (a, b))
406 #if @GNULIB_POSIX_SPAWNATTR_GETSCHEDPARAM@
407 /* Get scheduling parameters from the attribute structure. */
408 # if @REPLACE_POSIX_SPAWN@
409 # define posix_spawnattr_getschedparam rpl_posix_spawnattr_getschedparam
411 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
412 extern int posix_spawnattr_getschedparam (const posix_spawnattr_t *_Restrict_ __attr,
413 struct sched_param *_Restrict_ __schedparam)
414 __THROW _GL_ARG_NONNULL ((1, 2));
416 #elif defined GNULIB_POSIXCHECK
417 # undef posix_spawnattr_getschedparam
418 # define posix_spawnattr_getschedparam(a, b) \
419 (GL_LINK_WARNING ("posix_spawnattr_getschedparam is unportable - " \
420 "use gnulib module posix_spawnattr_getschedparam for portability"), \
421 posix_spawnattr_getschedparam (a, b))
424 #if @GNULIB_POSIX_SPAWNATTR_SETSCHEDPARAM@
425 /* Store scheduling parameters in the attribute structure. */
426 # if @REPLACE_POSIX_SPAWN@
427 # define posix_spawnattr_setschedparam rpl_posix_spawnattr_setschedparam
429 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
430 extern int posix_spawnattr_setschedparam (posix_spawnattr_t *_Restrict_ __attr,
431 const struct sched_param *_Restrict_ __schedparam)
432 __THROW _GL_ARG_NONNULL ((1, 2));
434 #elif defined GNULIB_POSIXCHECK
435 # undef posix_spawnattr_setschedparam
436 # define posix_spawnattr_setschedparam(a, b) \
437 (GL_LINK_WARNING ("posix_spawnattr_setschedparam is unportable - " \
438 "use gnulib module posix_spawnattr_setschedparam for portability"), \
439 posix_spawnattr_setschedparam (a, b))
443 #if @GNULIB_POSIX_SPAWN_FILE_ACTIONS_INIT@
444 /* Initialize data structure for file attribute for `spawn' call. */
445 # if @REPLACE_POSIX_SPAWN@
446 # define posix_spawn_file_actions_init rpl_posix_spawn_file_actions_init
448 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
449 extern int posix_spawn_file_actions_init (posix_spawn_file_actions_t *__file_actions)
450 __THROW _GL_ARG_NONNULL ((1));
452 #elif defined GNULIB_POSIXCHECK
453 # undef posix_spawn_file_actions_init
454 # define posix_spawn_file_actions_init(a) \
455 (GL_LINK_WARNING ("posix_spawn_file_actions_init is unportable - " \
456 "use gnulib module posix_spawn_file_actions_init for portability"), \
457 posix_spawn_file_actions_init (a))
460 #if @GNULIB_POSIX_SPAWN_FILE_ACTIONS_DESTROY@
461 /* Free resources associated with FILE-ACTIONS. */
462 # if @REPLACE_POSIX_SPAWN@
463 # define posix_spawn_file_actions_destroy rpl_posix_spawn_file_actions_destroy
465 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
466 extern int posix_spawn_file_actions_destroy (posix_spawn_file_actions_t *__file_actions)
467 __THROW _GL_ARG_NONNULL ((1));
469 #elif defined GNULIB_POSIXCHECK
470 # undef posix_spawn_file_actions_destroy
471 # define posix_spawn_file_actions_destroy(a) \
472 (GL_LINK_WARNING ("posix_spawn_file_actions_destroy is unportable - " \
473 "use gnulib module posix_spawn_file_actions_destroy for portability"), \
474 posix_spawn_file_actions_destroy (a))
477 #if @GNULIB_POSIX_SPAWN_FILE_ACTIONS_ADDOPEN@
478 /* Add an action to FILE-ACTIONS which tells the implementation to call
479 `open' for the given file during the `spawn' call. */
480 # if @REPLACE_POSIX_SPAWN@
481 # define posix_spawn_file_actions_addopen rpl_posix_spawn_file_actions_addopen
483 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
484 extern int posix_spawn_file_actions_addopen (posix_spawn_file_actions_t *_Restrict_ __file_actions,
486 const char *_Restrict_ __path,
487 int __oflag, mode_t __mode)
488 __THROW _GL_ARG_NONNULL ((1, 3));
490 #elif defined GNULIB_POSIXCHECK
491 # undef posix_spawn_file_actions_addopen
492 # define posix_spawn_file_actions_addopen(a, b, c, d, e) \
493 (GL_LINK_WARNING ("posix_spawn_file_actions_addopen is unportable - " \
494 "use gnulib module posix_spawn_file_actions_addopen for portability"), \
495 posix_spawn_file_actions_addopen (a, b, c, d, e))
498 #if @GNULIB_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE@
499 /* Add an action to FILE-ACTIONS which tells the implementation to call
500 `close' for the given file descriptor during the `spawn' call. */
501 # if @REPLACE_POSIX_SPAWN@
502 # define posix_spawn_file_actions_addclose rpl_posix_spawn_file_actions_addclose
504 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
505 extern int posix_spawn_file_actions_addclose (posix_spawn_file_actions_t *__file_actions,
507 __THROW _GL_ARG_NONNULL ((1));
509 #elif defined GNULIB_POSIXCHECK
510 # undef posix_spawn_file_actions_addclose
511 # define posix_spawn_file_actions_addclose(a,b) \
512 (GL_LINK_WARNING ("posix_spawn_file_actions_addclose is unportable - " \
513 "use gnulib module posix_spawn_file_actions_addclose for portability"), \
514 posix_spawn_file_actions_addclose (a, b))
517 #if @GNULIB_POSIX_SPAWN_FILE_ACTIONS_ADDDUP2@
518 /* Add an action to FILE-ACTIONS which tells the implementation to call
519 `dup2' for the given file descriptors during the `spawn' call. */
520 # if @REPLACE_POSIX_SPAWN@
521 # define posix_spawn_file_actions_adddup2 rpl_posix_spawn_file_actions_adddup2
523 # if !@HAVE_POSIX_SPAWN@ || @REPLACE_POSIX_SPAWN@
524 extern int posix_spawn_file_actions_adddup2 (posix_spawn_file_actions_t *__file_actions,
525 int __fd, int __newfd)
526 __THROW _GL_ARG_NONNULL ((1));
528 #elif defined GNULIB_POSIXCHECK
529 # undef posix_spawn_file_actions_adddup2
530 # define posix_spawn_file_actions_adddup2(a,b,c) \
531 (GL_LINK_WARNING ("posix_spawn_file_actions_adddup2 is unportable - " \
532 "use gnulib module posix_spawn_file_actions_adddup2 for portability"), \
533 posix_spawn_file_actions_adddup2 (a, b, c))
542 #endif /* _GL_SPAWN_H */
543 #endif /* _GL_SPAWN_H */