|
265
|
1 /* Substitute for and wrapper around <unistd.h>.
|
|
|
2 Copyright (C) 2003-2009 Free Software Foundation, Inc.
|
|
|
3
|
|
|
4 This program is free software; you can redistribute it and/or modify
|
|
|
5 it under the terms of the GNU General Public License as published by
|
|
|
6 the Free Software Foundation; either version 2, or (at your option)
|
|
|
7 any later version.
|
|
|
8
|
|
|
9 This program is distributed in the hope that it will be useful,
|
|
|
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
12 GNU General Public License for more details.
|
|
|
13
|
|
|
14 You should have received a copy of the GNU General Public License
|
|
|
15 along with this program; if not, write to the Free Software Foundation,
|
|
|
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
|
|
|
17
|
|
|
18 #ifndef _GL_UNISTD_H
|
|
|
19
|
|
|
20 #if __GNUC__ >= 3
|
|
|
21 @PRAGMA_SYSTEM_HEADER@
|
|
|
22 #endif
|
|
|
23
|
|
|
24 /* The include_next requires a split double-inclusion guard. */
|
|
|
25 #if @HAVE_UNISTD_H@
|
|
|
26 # @INCLUDE_NEXT@ @NEXT_UNISTD_H@
|
|
|
27 #endif
|
|
|
28
|
|
|
29 #ifndef _GL_UNISTD_H
|
|
|
30 #define _GL_UNISTD_H
|
|
|
31
|
|
|
32 /* mingw doesn't define the SEEK_* or *_FILENO macros in <unistd.h>. */
|
|
|
33 #if !(defined SEEK_CUR && defined SEEK_END && defined SEEK_SET)
|
|
|
34 # include <stdio.h>
|
|
|
35 #endif
|
|
|
36
|
|
|
37 /* mingw fails to declare _exit in <unistd.h>. */
|
|
|
38 /* mingw, BeOS, Haiku declare environ in <stdlib.h>, not in <unistd.h>. */
|
|
|
39 #include <stdlib.h>
|
|
|
40
|
|
|
41 #if @GNULIB_WRITE@ && @REPLACE_WRITE@ && @GNULIB_UNISTD_H_SIGPIPE@
|
|
|
42 /* Get ssize_t. */
|
|
|
43 # include <sys/types.h>
|
|
|
44 #endif
|
|
|
45
|
|
|
46 #if @GNULIB_GETHOSTNAME@
|
|
|
47 /* Get all possible declarations of gethostname(). */
|
|
|
48 # if @UNISTD_H_HAVE_WINSOCK2_H@
|
|
|
49 # include <winsock2.h>
|
|
|
50 # if !defined _GL_SYS_SOCKET_H
|
|
|
51 # undef socket
|
|
|
52 # define socket socket_used_without_including_sys_socket_h
|
|
|
53 # undef connect
|
|
|
54 # define connect connect_used_without_including_sys_socket_h
|
|
|
55 # undef accept
|
|
|
56 # define accept accept_used_without_including_sys_socket_h
|
|
|
57 # undef bind
|
|
|
58 # define bind bind_used_without_including_sys_socket_h
|
|
|
59 # undef getpeername
|
|
|
60 # define getpeername getpeername_used_without_including_sys_socket_h
|
|
|
61 # undef getsockname
|
|
|
62 # define getsockname getsockname_used_without_including_sys_socket_h
|
|
|
63 # undef getsockopt
|
|
|
64 # define getsockopt getsockopt_used_without_including_sys_socket_h
|
|
|
65 # undef listen
|
|
|
66 # define listen listen_used_without_including_sys_socket_h
|
|
|
67 # undef recv
|
|
|
68 # define recv recv_used_without_including_sys_socket_h
|
|
|
69 # undef send
|
|
|
70 # define send send_used_without_including_sys_socket_h
|
|
|
71 # undef recvfrom
|
|
|
72 # define recvfrom recvfrom_used_without_including_sys_socket_h
|
|
|
73 # undef sendto
|
|
|
74 # define sendto sendto_used_without_including_sys_socket_h
|
|
|
75 # undef setsockopt
|
|
|
76 # define setsockopt setsockopt_used_without_including_sys_socket_h
|
|
|
77 # undef shutdown
|
|
|
78 # define shutdown shutdown_used_without_including_sys_socket_h
|
|
|
79 # endif
|
|
|
80 # if !defined _GL_SYS_SELECT_H
|
|
|
81 # undef select
|
|
|
82 # define select select_used_without_including_sys_select_h
|
|
|
83 # endif
|
|
|
84 # endif
|
|
|
85 #endif
|
|
|
86
|
|
|
87 /* The definition of GL_LINK_WARNING is copied here. */
|
|
|
88
|
|
|
89
|
|
|
90 /* OS/2 EMX lacks these macros. */
|
|
|
91 #ifndef STDIN_FILENO
|
|
|
92 # define STDIN_FILENO 0
|
|
|
93 #endif
|
|
|
94 #ifndef STDOUT_FILENO
|
|
|
95 # define STDOUT_FILENO 1
|
|
|
96 #endif
|
|
|
97 #ifndef STDERR_FILENO
|
|
|
98 # define STDERR_FILENO 2
|
|
|
99 #endif
|
|
|
100
|
|
|
101 /* Declare overridden functions. */
|
|
|
102
|
|
|
103 #ifdef __cplusplus
|
|
|
104 extern "C" {
|
|
|
105 #endif
|
|
|
106
|
|
|
107
|
|
|
108 #if @GNULIB_CHOWN@
|
|
|
109 # if @REPLACE_CHOWN@
|
|
|
110 # ifndef REPLACE_CHOWN
|
|
|
111 # define REPLACE_CHOWN 1
|
|
|
112 # endif
|
|
|
113 # if REPLACE_CHOWN
|
|
|
114 /* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
|
|
|
115 to GID (if GID is not -1). Follow symbolic links.
|
|
|
116 Return 0 if successful, otherwise -1 and errno set.
|
|
|
117 See the POSIX:2001 specification
|
|
|
118 <http://www.opengroup.org/susv3xsh/chown.html>. */
|
|
|
119 # define chown rpl_chown
|
|
|
120 extern int chown (const char *file, uid_t uid, gid_t gid);
|
|
|
121 # endif
|
|
|
122 # endif
|
|
|
123 #elif defined GNULIB_POSIXCHECK
|
|
|
124 # undef chown
|
|
|
125 # define chown(f,u,g) \
|
|
|
126 (GL_LINK_WARNING ("chown fails to follow symlinks on some systems and " \
|
|
|
127 "doesn't treat a uid or gid of -1 on some systems - " \
|
|
|
128 "use gnulib module chown for portability"), \
|
|
|
129 chown (f, u, g))
|
|
|
130 #endif
|
|
|
131
|
|
|
132
|
|
|
133 #if @GNULIB_CLOSE@
|
|
|
134 # if @REPLACE_CLOSE@
|
|
|
135 /* Automatically included by modules that need a replacement for close. */
|
|
|
136 # undef close
|
|
|
137 # define close rpl_close
|
|
|
138 extern int close (int);
|
|
|
139 # endif
|
|
|
140 #elif @UNISTD_H_HAVE_WINSOCK2_H@
|
|
|
141 # undef close
|
|
|
142 # define close close_used_without_requesting_gnulib_module_close
|
|
|
143 #elif defined GNULIB_POSIXCHECK
|
|
|
144 # undef close
|
|
|
145 # define close(f) \
|
|
|
146 (GL_LINK_WARNING ("close does not portably work on sockets - " \
|
|
|
147 "use gnulib module close for portability"), \
|
|
|
148 close (f))
|
|
|
149 #endif
|
|
|
150
|
|
|
151
|
|
|
152 #if @GNULIB_DUP2@
|
|
|
153 # if !@HAVE_DUP2@
|
|
|
154 /* Copy the file descriptor OLDFD into file descriptor NEWFD. Do nothing if
|
|
|
155 NEWFD = OLDFD, otherwise close NEWFD first if it is open.
|
|
|
156 Return 0 if successful, otherwise -1 and errno set.
|
|
|
157 See the POSIX:2001 specification
|
|
|
158 <http://www.opengroup.org/susv3xsh/dup2.html>. */
|
|
|
159 extern int dup2 (int oldfd, int newfd);
|
|
|
160 # endif
|
|
|
161 #elif defined GNULIB_POSIXCHECK
|
|
|
162 # undef dup2
|
|
|
163 # define dup2(o,n) \
|
|
|
164 (GL_LINK_WARNING ("dup2 is unportable - " \
|
|
|
165 "use gnulib module dup2 for portability"), \
|
|
|
166 dup2 (o, n))
|
|
|
167 #endif
|
|
|
168
|
|
|
169
|
|
|
170 #if @GNULIB_ENVIRON@
|
|
|
171 # if !@HAVE_DECL_ENVIRON@
|
|
|
172 /* Set of environment variables and values. An array of strings of the form
|
|
|
173 "VARIABLE=VALUE", terminated with a NULL. */
|
|
|
174 # if defined __APPLE__ && defined __MACH__
|
|
|
175 # include <crt_externs.h>
|
|
|
176 # define environ (*_NSGetEnviron ())
|
|
|
177 # else
|
|
|
178 extern char **environ;
|
|
|
179 # endif
|
|
|
180 # endif
|
|
|
181 #elif defined GNULIB_POSIXCHECK
|
|
|
182 # undef environ
|
|
|
183 # define environ \
|
|
|
184 (GL_LINK_WARNING ("environ is unportable - " \
|
|
|
185 "use gnulib module environ for portability"), \
|
|
|
186 environ)
|
|
|
187 #endif
|
|
|
188
|
|
|
189
|
|
|
190 #if @GNULIB_EUIDACCESS@
|
|
|
191 # if !@HAVE_EUIDACCESS@
|
|
|
192 /* Like access(), except that is uses the effective user id and group id of
|
|
|
193 the current process. */
|
|
|
194 extern int euidaccess (const char *filename, int mode);
|
|
|
195 # endif
|
|
|
196 #elif defined GNULIB_POSIXCHECK
|
|
|
197 # undef euidaccess
|
|
|
198 # define euidaccess(f,m) \
|
|
|
199 (GL_LINK_WARNING ("euidaccess is unportable - " \
|
|
|
200 "use gnulib module euidaccess for portability"), \
|
|
|
201 euidaccess (f, m))
|
|
|
202 #endif
|
|
|
203
|
|
|
204
|
|
|
205 #if @GNULIB_FCHDIR@
|
|
|
206 # if @REPLACE_FCHDIR@
|
|
|
207
|
|
|
208 /* Change the process' current working directory to the directory on which
|
|
|
209 the given file descriptor is open.
|
|
|
210 Return 0 if successful, otherwise -1 and errno set.
|
|
|
211 See the POSIX:2001 specification
|
|
|
212 <http://www.opengroup.org/susv3xsh/fchdir.html>. */
|
|
|
213 extern int fchdir (int /*fd*/);
|
|
|
214
|
|
|
215 # define dup rpl_dup
|
|
|
216 extern int dup (int);
|
|
|
217 # define dup2 rpl_dup2
|
|
|
218 extern int dup2 (int, int);
|
|
|
219
|
|
|
220 # endif
|
|
|
221 #elif defined GNULIB_POSIXCHECK
|
|
|
222 # undef fchdir
|
|
|
223 # define fchdir(f) \
|
|
|
224 (GL_LINK_WARNING ("fchdir is unportable - " \
|
|
|
225 "use gnulib module fchdir for portability"), \
|
|
|
226 fchdir (f))
|
|
|
227 #endif
|
|
|
228
|
|
|
229
|
|
|
230 #if @GNULIB_FSYNC@
|
|
|
231 /* Synchronize changes to a file.
|
|
|
232 Return 0 if successful, otherwise -1 and errno set.
|
|
|
233 See POSIX:2001 specification
|
|
|
234 <http://www.opengroup.org/susv3xsh/fsync.html>. */
|
|
|
235 # if !@HAVE_FSYNC@
|
|
|
236 extern int fsync (int fd);
|
|
|
237 # endif
|
|
|
238 #elif defined GNULIB_POSIXCHECK
|
|
|
239 # undef fsync
|
|
|
240 # define fsync(fd) \
|
|
|
241 (GL_LINK_WARNING ("fsync is unportable - " \
|
|
|
242 "use gnulib module fsync for portability"), \
|
|
|
243 fsync (fd))
|
|
|
244 #endif
|
|
|
245
|
|
|
246
|
|
|
247 #if @GNULIB_FTRUNCATE@
|
|
|
248 # if !@HAVE_FTRUNCATE@
|
|
|
249 /* Change the size of the file to which FD is opened to become equal to LENGTH.
|
|
|
250 Return 0 if successful, otherwise -1 and errno set.
|
|
|
251 See the POSIX:2001 specification
|
|
|
252 <http://www.opengroup.org/susv3xsh/ftruncate.html>. */
|
|
|
253 extern int ftruncate (int fd, off_t length);
|
|
|
254 # endif
|
|
|
255 #elif defined GNULIB_POSIXCHECK
|
|
|
256 # undef ftruncate
|
|
|
257 # define ftruncate(f,l) \
|
|
|
258 (GL_LINK_WARNING ("ftruncate is unportable - " \
|
|
|
259 "use gnulib module ftruncate for portability"), \
|
|
|
260 ftruncate (f, l))
|
|
|
261 #endif
|
|
|
262
|
|
|
263
|
|
|
264 #if @GNULIB_GETCWD@
|
|
|
265 /* Include the headers that might declare getcwd so that they will not
|
|
|
266 cause confusion if included after this file. */
|
|
|
267 # include <stdlib.h>
|
|
|
268 # if @REPLACE_GETCWD@
|
|
|
269 /* Get the name of the current working directory, and put it in SIZE bytes
|
|
|
270 of BUF.
|
|
|
271 Return BUF if successful, or NULL if the directory couldn't be determined
|
|
|
272 or SIZE was too small.
|
|
|
273 See the POSIX:2001 specification
|
|
|
274 <http://www.opengroup.org/susv3xsh/getcwd.html>.
|
|
|
275 Additionally, the gnulib module 'getcwd' guarantees the following GNU
|
|
|
276 extension: If BUF is NULL, an array is allocated with 'malloc'; the array
|
|
|
277 is SIZE bytes long, unless SIZE == 0, in which case it is as big as
|
|
|
278 necessary. */
|
|
|
279 # define getcwd rpl_getcwd
|
|
|
280 extern char * getcwd (char *buf, size_t size);
|
|
|
281 # endif
|
|
|
282 #elif defined GNULIB_POSIXCHECK
|
|
|
283 # undef getcwd
|
|
|
284 # define getcwd(b,s) \
|
|
|
285 (GL_LINK_WARNING ("getcwd is unportable - " \
|
|
|
286 "use gnulib module getcwd for portability"), \
|
|
|
287 getcwd (b, s))
|
|
|
288 #endif
|
|
|
289
|
|
|
290
|
|
|
291 #if @GNULIB_GETDOMAINNAME@
|
|
|
292 /* Return the NIS domain name of the machine.
|
|
|
293 WARNING! The NIS domain name is unrelated to the fully qualified host name
|
|
|
294 of the machine. It is also unrelated to email addresses.
|
|
|
295 WARNING! The NIS domain name is usually the empty string or "(none)" when
|
|
|
296 not using NIS.
|
|
|
297
|
|
|
298 Put up to LEN bytes of the NIS domain name into NAME.
|
|
|
299 Null terminate it if the name is shorter than LEN.
|
|
|
300 If the NIS domain name is longer than LEN, set errno = EINVAL and return -1.
|
|
|
301 Return 0 if successful, otherwise set errno and return -1. */
|
|
|
302 # if !@HAVE_GETDOMAINNAME@
|
|
|
303 extern int getdomainname(char *name, size_t len);
|
|
|
304 # endif
|
|
|
305 #elif defined GNULIB_POSIXCHECK
|
|
|
306 # undef getdomainname
|
|
|
307 # define getdomainname(n,l) \
|
|
|
308 (GL_LINK_WARNING ("getdomainname is unportable - " \
|
|
|
309 "use gnulib module getdomainname for portability"), \
|
|
|
310 getdomainname (n, l))
|
|
|
311 #endif
|
|
|
312
|
|
|
313
|
|
|
314 #if @GNULIB_GETDTABLESIZE@
|
|
|
315 # if !@HAVE_GETDTABLESIZE@
|
|
|
316 /* Return the maximum number of file descriptors in the current process. */
|
|
|
317 extern int getdtablesize (void);
|
|
|
318 # endif
|
|
|
319 #elif defined GNULIB_POSIXCHECK
|
|
|
320 # undef getdtablesize
|
|
|
321 # define getdtablesize() \
|
|
|
322 (GL_LINK_WARNING ("getdtablesize is unportable - " \
|
|
|
323 "use gnulib module getdtablesize for portability"), \
|
|
|
324 getdtablesize ())
|
|
|
325 #endif
|
|
|
326
|
|
|
327
|
|
|
328 #if @GNULIB_GETHOSTNAME@
|
|
|
329 /* Return the standard host name of the machine.
|
|
|
330 WARNING! The host name may or may not be fully qualified.
|
|
|
331
|
|
|
332 Put up to LEN bytes of the host name into NAME.
|
|
|
333 Null terminate it if the name is shorter than LEN.
|
|
|
334 If the host name is longer than LEN, set errno = EINVAL and return -1.
|
|
|
335 Return 0 if successful, otherwise set errno and return -1. */
|
|
|
336 # if @UNISTD_H_HAVE_WINSOCK2_H@
|
|
|
337 # undef gethostname
|
|
|
338 # define gethostname rpl_gethostname
|
|
|
339 # endif
|
|
|
340 # if @UNISTD_H_HAVE_WINSOCK2_H@ || !@HAVE_GETHOSTNAME@
|
|
|
341 extern int gethostname(char *name, size_t len);
|
|
|
342 # endif
|
|
|
343 #elif @UNISTD_H_HAVE_WINSOCK2_H@
|
|
|
344 # undef gethostname
|
|
|
345 # define gethostname gethostname_used_without_requesting_gnulib_module_gethostname
|
|
|
346 #elif defined GNULIB_POSIXCHECK
|
|
|
347 # undef gethostname
|
|
|
348 # define gethostname(n,l) \
|
|
|
349 (GL_LINK_WARNING ("gethostname is unportable - " \
|
|
|
350 "use gnulib module gethostname for portability"), \
|
|
|
351 gethostname (n, l))
|
|
|
352 #endif
|
|
|
353
|
|
|
354
|
|
|
355 #if @GNULIB_GETLOGIN_R@
|
|
|
356 /* Copies the user's login name to NAME.
|
|
|
357 The array pointed to by NAME has room for SIZE bytes.
|
|
|
358
|
|
|
359 Returns 0 if successful. Upon error, an error number is returned, or -1 in
|
|
|
360 the case that the login name cannot be found but no specific error is
|
|
|
361 provided (this case is hopefully rare but is left open by the POSIX spec).
|
|
|
362
|
|
|
363 See <http://www.opengroup.org/susv3xsh/getlogin.html>.
|
|
|
364 */
|
|
|
365 # if !@HAVE_DECL_GETLOGIN_R@
|
|
|
366 # include <stddef.h>
|
|
|
367 extern int getlogin_r (char *name, size_t size);
|
|
|
368 # endif
|
|
|
369 #elif defined GNULIB_POSIXCHECK
|
|
|
370 # undef getlogin_r
|
|
|
371 # define getlogin_r(n,s) \
|
|
|
372 (GL_LINK_WARNING ("getlogin_r is unportable - " \
|
|
|
373 "use gnulib module getlogin_r for portability"), \
|
|
|
374 getlogin_r (n, s))
|
|
|
375 #endif
|
|
|
376
|
|
|
377
|
|
|
378 #if @GNULIB_GETPAGESIZE@
|
|
|
379 # if @REPLACE_GETPAGESIZE@
|
|
|
380 # define getpagesize rpl_getpagesize
|
|
|
381 extern int getpagesize (void);
|
|
|
382 # elif !@HAVE_GETPAGESIZE@
|
|
|
383 /* This is for POSIX systems. */
|
|
|
384 # if !defined getpagesize && defined _SC_PAGESIZE
|
|
|
385 # if ! (defined __VMS && __VMS_VER < 70000000)
|
|
|
386 # define getpagesize() sysconf (_SC_PAGESIZE)
|
|
|
387 # endif
|
|
|
388 # endif
|
|
|
389 /* This is for older VMS. */
|
|
|
390 # if !defined getpagesize && defined __VMS
|
|
|
391 # ifdef __ALPHA
|
|
|
392 # define getpagesize() 8192
|
|
|
393 # else
|
|
|
394 # define getpagesize() 512
|
|
|
395 # endif
|
|
|
396 # endif
|
|
|
397 /* This is for BeOS. */
|
|
|
398 # if !defined getpagesize && @HAVE_OS_H@
|
|
|
399 # include <OS.h>
|
|
|
400 # if defined B_PAGE_SIZE
|
|
|
401 # define getpagesize() B_PAGE_SIZE
|
|
|
402 # endif
|
|
|
403 # endif
|
|
|
404 /* This is for AmigaOS4.0. */
|
|
|
405 # if !defined getpagesize && defined __amigaos4__
|
|
|
406 # define getpagesize() 2048
|
|
|
407 # endif
|
|
|
408 /* This is for older Unix systems. */
|
|
|
409 # if !defined getpagesize && @HAVE_SYS_PARAM_H@
|
|
|
410 # include <sys/param.h>
|
|
|
411 # ifdef EXEC_PAGESIZE
|
|
|
412 # define getpagesize() EXEC_PAGESIZE
|
|
|
413 # else
|
|
|
414 # ifdef NBPG
|
|
|
415 # ifndef CLSIZE
|
|
|
416 # define CLSIZE 1
|
|
|
417 # endif
|
|
|
418 # define getpagesize() (NBPG * CLSIZE)
|
|
|
419 # else
|
|
|
420 # ifdef NBPC
|
|
|
421 # define getpagesize() NBPC
|
|
|
422 # endif
|
|
|
423 # endif
|
|
|
424 # endif
|
|
|
425 # endif
|
|
|
426 # endif
|
|
|
427 #elif defined GNULIB_POSIXCHECK
|
|
|
428 # undef getpagesize
|
|
|
429 # define getpagesize() \
|
|
|
430 (GL_LINK_WARNING ("getpagesize is unportable - " \
|
|
|
431 "use gnulib module getpagesize for portability"), \
|
|
|
432 getpagesize ())
|
|
|
433 #endif
|
|
|
434
|
|
|
435
|
|
|
436 #if @GNULIB_GETUSERSHELL@
|
|
|
437 # if !@HAVE_GETUSERSHELL@
|
|
|
438 /* Return the next valid login shell on the system, or NULL when the end of
|
|
|
439 the list has been reached. */
|
|
|
440 extern char *getusershell (void);
|
|
|
441 /* Rewind to pointer that is advanced at each getusershell() call. */
|
|
|
442 extern void setusershell (void);
|
|
|
443 /* Free the pointer that is advanced at each getusershell() call and
|
|
|
444 associated resources. */
|
|
|
445 extern void endusershell (void);
|
|
|
446 # endif
|
|
|
447 #elif defined GNULIB_POSIXCHECK
|
|
|
448 # undef getusershell
|
|
|
449 # define getusershell() \
|
|
|
450 (GL_LINK_WARNING ("getusershell is unportable - " \
|
|
|
451 "use gnulib module getusershell for portability"), \
|
|
|
452 getusershell ())
|
|
|
453 # undef setusershell
|
|
|
454 # define setusershell() \
|
|
|
455 (GL_LINK_WARNING ("setusershell is unportable - " \
|
|
|
456 "use gnulib module getusershell for portability"), \
|
|
|
457 setusershell ())
|
|
|
458 # undef endusershell
|
|
|
459 # define endusershell() \
|
|
|
460 (GL_LINK_WARNING ("endusershell is unportable - " \
|
|
|
461 "use gnulib module getusershell for portability"), \
|
|
|
462 endusershell ())
|
|
|
463 #endif
|
|
|
464
|
|
|
465
|
|
|
466 #if @GNULIB_LCHOWN@
|
|
|
467 # if @REPLACE_LCHOWN@
|
|
|
468 /* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
|
|
|
469 to GID (if GID is not -1). Do not follow symbolic links.
|
|
|
470 Return 0 if successful, otherwise -1 and errno set.
|
|
|
471 See the POSIX:2001 specification
|
|
|
472 <http://www.opengroup.org/susv3xsh/lchown.html>. */
|
|
|
473 # define lchown rpl_lchown
|
|
|
474 extern int lchown (char const *file, uid_t owner, gid_t group);
|
|
|
475 # endif
|
|
|
476 #elif defined GNULIB_POSIXCHECK
|
|
|
477 # undef lchown
|
|
|
478 # define lchown(f,u,g) \
|
|
|
479 (GL_LINK_WARNING ("lchown is unportable to pre-POSIX.1-2001 " \
|
|
|
480 "systems - use gnulib module lchown for portability"), \
|
|
|
481 lchown (f, u, g))
|
|
|
482 #endif
|
|
|
483
|
|
|
484
|
|
|
485 #if @GNULIB_LINK@
|
|
|
486 /* Create a new hard link for an existing file.
|
|
|
487 Return 0 if successful, otherwise -1 and errno set.
|
|
|
488 See POSIX:2001 specification
|
|
|
489 <http://www.opengroup.org/susv3xsh/link.html>. */
|
|
|
490 # if !@HAVE_LINK@
|
|
|
491 extern int link (const char *path1, const char *path2);
|
|
|
492 # endif
|
|
|
493 #elif defined GNULIB_POSIXCHECK
|
|
|
494 # undef link
|
|
|
495 # define link(path1,path2) \
|
|
|
496 (GL_LINK_WARNING ("link is unportable - " \
|
|
|
497 "use gnulib module link for portability"), \
|
|
|
498 link (path1, path2))
|
|
|
499 #endif
|
|
|
500
|
|
|
501
|
|
|
502 #if @GNULIB_LSEEK@
|
|
|
503 # if @REPLACE_LSEEK@
|
|
|
504 /* Set the offset of FD relative to SEEK_SET, SEEK_CUR, or SEEK_END.
|
|
|
505 Return the new offset if successful, otherwise -1 and errno set.
|
|
|
506 See the POSIX:2001 specification
|
|
|
507 <http://www.opengroup.org/susv3xsh/lseek.html>. */
|
|
|
508 # define lseek rpl_lseek
|
|
|
509 extern off_t lseek (int fd, off_t offset, int whence);
|
|
|
510 # endif
|
|
|
511 #elif defined GNULIB_POSIXCHECK
|
|
|
512 # undef lseek
|
|
|
513 # define lseek(f,o,w) \
|
|
|
514 (GL_LINK_WARNING ("lseek does not fail with ESPIPE on pipes on some " \
|
|
|
515 "systems - use gnulib module lseek for portability"), \
|
|
|
516 lseek (f, o, w))
|
|
|
517 #endif
|
|
|
518
|
|
|
519
|
|
|
520 #if @GNULIB_READLINK@
|
|
|
521 /* Read the contents of the symbolic link FILE and place the first BUFSIZE
|
|
|
522 bytes of it into BUF. Return the number of bytes placed into BUF if
|
|
|
523 successful, otherwise -1 and errno set.
|
|
|
524 See the POSIX:2001 specification
|
|
|
525 <http://www.opengroup.org/susv3xsh/readlink.html>. */
|
|
|
526 # if !@HAVE_READLINK@
|
|
|
527 # include <stddef.h>
|
|
|
528 extern int readlink (const char *file, char *buf, size_t bufsize);
|
|
|
529 # endif
|
|
|
530 #elif defined GNULIB_POSIXCHECK
|
|
|
531 # undef readlink
|
|
|
532 # define readlink(f,b,s) \
|
|
|
533 (GL_LINK_WARNING ("readlink is unportable - " \
|
|
|
534 "use gnulib module readlink for portability"), \
|
|
|
535 readlink (f, b, s))
|
|
|
536 #endif
|
|
|
537
|
|
|
538
|
|
|
539 #if @GNULIB_SLEEP@
|
|
|
540 /* Pause the execution of the current thread for N seconds.
|
|
|
541 Returns the number of seconds left to sleep.
|
|
|
542 See the POSIX:2001 specification
|
|
|
543 <http://www.opengroup.org/susv3xsh/sleep.html>. */
|
|
|
544 # if !@HAVE_SLEEP@
|
|
|
545 extern unsigned int sleep (unsigned int n);
|
|
|
546 # endif
|
|
|
547 #elif defined GNULIB_POSIXCHECK
|
|
|
548 # undef sleep
|
|
|
549 # define sleep(n) \
|
|
|
550 (GL_LINK_WARNING ("sleep is unportable - " \
|
|
|
551 "use gnulib module sleep for portability"), \
|
|
|
552 sleep (n))
|
|
|
553 #endif
|
|
|
554
|
|
|
555
|
|
|
556 #if @GNULIB_WRITE@ && @REPLACE_WRITE@ && @GNULIB_UNISTD_H_SIGPIPE@
|
|
|
557 /* Write up to COUNT bytes starting at BUF to file descriptor FD.
|
|
|
558 See the POSIX:2001 specification
|
|
|
559 <http://www.opengroup.org/susv3xsh/write.html>. */
|
|
|
560 # undef write
|
|
|
561 # define write rpl_write
|
|
|
562 extern ssize_t write (int fd, const void *buf, size_t count);
|
|
|
563 #endif
|
|
|
564
|
|
|
565
|
|
|
566 #ifdef FCHDIR_REPLACEMENT
|
|
|
567 /* gnulib internal function. */
|
|
|
568 extern void _gl_unregister_fd (int fd);
|
|
|
569 #endif
|
|
|
570
|
|
|
571
|
|
|
572 #ifdef __cplusplus
|
|
|
573 }
|
|
|
574 #endif
|
|
|
575
|
|
|
576
|
|
|
577 #endif /* _GL_UNISTD_H */
|
|
|
578 #endif /* _GL_UNISTD_H */
|
