1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
|
/* Substitute for and wrapper around <unistd.h>.
Copyright (C) 2004-2007 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifndef _GL_UNISTD_H
/* The include_next requires a split double-inclusion guard. */
#if @HAVE_UNISTD_H@
# @INCLUDE_NEXT@ @NEXT_UNISTD_H@
#endif
#ifndef _GL_UNISTD_H
#define _GL_UNISTD_H
/* mingw doesn't define the SEEK_* macros in <unistd.h>. */
#if !(defined SEEK_CUR && defined SEEK_END && defined SEEK_SET)
# include <stdio.h>
#endif
/* mingw fails to declare _exit in <unistd.h>. */
#include <stdlib.h>
/* The definition of GL_LINK_WARNING is copied here. */
/* Declare overridden functions. */
#ifdef __cplusplus
extern "C" {
#endif
#if @GNULIB_CHOWN@
# if @REPLACE_CHOWN@
# ifndef REPLACE_CHOWN
# define REPLACE_CHOWN 1
# endif
# if REPLACE_CHOWN
/* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
to GID (if GID is not -1). Follow symbolic links.
Return 0 if successful, otherwise -1 and errno set.
See the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/chown.html>. */
# define chown rpl_chown
extern int chown (const char *file, uid_t uid, gid_t gid);
# endif
# endif
#elif defined GNULIB_POSIXCHECK
# undef chown
# define chown(f,u,g) \
(GL_LINK_WARNING ("chown fails to follow symlinks on some systems and " \
"doesn't treat a uid or gid of -1 on some systems - " \
"use gnulib module chown for portability"), \
chown (f, u, g))
#endif
#if @GNULIB_DUP2@
# if !@HAVE_DUP2@
/* Copy the file descriptor OLDFD into file descriptor NEWFD. Do nothing if
NEWFD = OLDFD, otherwise close NEWFD first if it is open.
Return 0 if successful, otherwise -1 and errno set.
See the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/dup2.html>. */
extern int dup2 (int oldfd, int newfd);
# endif
#elif defined GNULIB_POSIXCHECK
# undef dup2
# define dup2(o,n) \
(GL_LINK_WARNING ("dup2 is unportable - " \
"use gnulib module dup2 for portability"), \
dup2 (o, n))
#endif
#if @GNULIB_FCHDIR@
# if @REPLACE_FCHDIR@
/* Change the process' current working directory to the directory on which
the given file descriptor is open.
Return 0 if successful, otherwise -1 and errno set.
See the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/fchdir.html>. */
extern int fchdir (int /*fd*/);
# define close rpl_close
extern int close (int);
# define dup rpl_dup
extern int dup (int);
# define dup2 rpl_dup2
extern int dup2 (int, int);
# endif
#elif defined GNULIB_POSIXCHECK
# undef fchdir
# define fchdir(f) \
(GL_LINK_WARNING ("fchdir is unportable - " \
"use gnulib module fchdir for portability"), \
fchdir (f))
#endif
#if @GNULIB_FTRUNCATE@
# if !@HAVE_FTRUNCATE@
/* Change the size of the file to which FD is opened to become equal to LENGTH.
Return 0 if successful, otherwise -1 and errno set.
See the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/ftruncate.html>. */
extern int ftruncate (int fd, off_t length);
# endif
#elif defined GNULIB_POSIXCHECK
# undef ftruncate
# define ftruncate(f,l) \
(GL_LINK_WARNING ("ftruncate is unportable - " \
"use gnulib module ftruncate for portability"), \
ftruncate (f, l))
#endif
#if @GNULIB_GETCWD@
/* Include the headers that might declare getcwd so that they will not
cause confusion if included after this file. */
# include <stdlib.h>
# if @REPLACE_GETCWD@
/* Get the name of the current working directory, and put it in SIZE bytes
of BUF.
Return BUF if successful, or NULL if the directory couldn't be determined
or SIZE was too small.
See the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/getcwd.html>.
Additionally, the gnulib module 'getcwd' guarantees the following GNU
extension: If BUF is NULL, an array is allocated with 'malloc'; the array
is SIZE bytes long, unless SIZE == 0, in which case it is as big as
necessary. */
# define getcwd rpl_getcwd
extern char * getcwd (char *buf, size_t size);
# endif
#elif defined GNULIB_POSIXCHECK
# undef getcwd
# define getcwd(b,s) \
(GL_LINK_WARNING ("getcwd is unportable - " \
"use gnulib module getcwd for portability"), \
getcwd (b, s))
#endif
#if @GNULIB_GETLOGIN_R@
/* Copies the user's login name to NAME.
The array pointed to by NAME has room for SIZE bytes.
Returns 0 if successful. Upon error, an error number is returned, or -1 in
the case that the login name cannot be found but no specific error is
provided (this case is hopefully rare but is left open by the POSIX spec).
See <http://www.opengroup.org/susv3xsh/getlogin.html>.
*/
# if !@HAVE_DECL_GETLOGIN_R@
# include <stddef.h>
extern int getlogin_r (char *name, size_t size);
# endif
#elif defined GNULIB_POSIXCHECK
# undef getlogin_r
# define getlogin_r(n,s) \
(GL_LINK_WARNING ("getlogin_r is unportable - " \
"use gnulib module getlogin_r for portability"), \
getlogin_r (n, s))
#endif
#if @GNULIB_GETPAGESIZE@
# if @REPLACE_GETPAGESIZE@
# define getpagesize rpl_getpagesize
extern int getpagesize (void);
# elif !@HAVE_GETPAGESIZE@
/* This is for POSIX systems. */
# if !defined getpagesize && defined _SC_PAGESIZE
# if ! (defined __VMS && __VMS_VER < 70000000)
# define getpagesize() sysconf (_SC_PAGESIZE)
# endif
# endif
/* This is for older VMS. */
# if !defined getpagesize && defined __VMS
# ifdef __ALPHA
# define getpagesize() 8192
# else
# define getpagesize() 512
# endif
# endif
/* This is for BeOS. */
# if !defined getpagesize && @HAVE_OS_H@
# include <OS.h>
# if defined B_PAGE_SIZE
# define getpagesize() B_PAGE_SIZE
# endif
# endif
/* This is for AmigaOS4.0. */
# if !defined getpagesize && defined __amigaos4__
# define getpagesize() 2048
# endif
/* This is for older Unix systems. */
# if !defined getpagesize && @HAVE_SYS_PARAM_H@
# include <sys/param.h>
# ifdef EXEC_PAGESIZE
# define getpagesize() EXEC_PAGESIZE
# else
# ifdef NBPG
# ifndef CLSIZE
# define CLSIZE 1
# endif
# define getpagesize() (NBPG * CLSIZE)
# else
# ifdef NBPC
# define getpagesize() NBPC
# endif
# endif
# endif
# endif
# endif
#elif defined GNULIB_POSIXCHECK
# undef getpagesize
# define getpagesize() \
(GL_LINK_WARNING ("getpagesize is unportable - " \
"use gnulib module getpagesize for portability"), \
getpagesize ())
#endif
#if @GNULIB_LCHOWN@
# if @REPLACE_LCHOWN@
/* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
to GID (if GID is not -1). Do not follow symbolic links.
Return 0 if successful, otherwise -1 and errno set.
See the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/lchown.html>. */
# define lchown rpl_lchown
extern int lchown (char const *file, uid_t owner, gid_t group);
# endif
#elif defined GNULIB_POSIXCHECK
# undef lchown
# define lchown(f,u,g) \
(GL_LINK_WARNING ("lchown is unportable to pre-POSIX.1-2001 " \
"systems - use gnulib module lchown for portability"), \
lchown (f, u, g))
#endif
#if @GNULIB_LSEEK@
# if @REPLACE_LSEEK@
/* Set the offset of FD relative to SEEK_SET, SEEK_CUR, or SEEK_END.
Return the new offset if successful, otherwise -1 and errno set.
See the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/lseek.html>. */
# define lseek rpl_lseek
extern off_t lseek (int fd, off_t offset, int whence);
# endif
#elif defined GNULIB_POSIXCHECK
# undef lseek
# define lseek(f,o,w) \
(GL_LINK_WARNING ("lseek does not fail with ESPIPE on pipes on some " \
"systems - use gnulib module lseek for portability"), \
lseek (f, o, w))
#endif
#if @GNULIB_READLINK@
/* Read the contents of the symbolic link FILE and place the first BUFSIZE
bytes of it into BUF. Return the number of bytes placed into BUF if
successful, otherwise -1 and errno set.
See the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/readlink.html>. */
# if !@HAVE_READLINK@
# include <stddef.h>
extern int readlink (const char *file, char *buf, size_t bufsize);
# endif
#elif defined GNULIB_POSIXCHECK
# undef readlink
# define readlink(f,b,s) \
(GL_LINK_WARNING ("readlink is unportable - " \
"use gnulib module readlink for portability"), \
readlink (f, b, s))
#endif
#if @GNULIB_SLEEP@
/* Pause the execution of the current thread for N seconds.
Returns the number of seconds left to sleep.
See the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/sleep.html>. */
# if !@HAVE_SLEEP@
extern unsigned int sleep (unsigned int n);
# endif
#elif defined GNULIB_POSIXCHECK
# undef sleep
# define sleep(n) \
(GL_LINK_WARNING ("sleep is unportable - " \
"use gnulib module sleep for portability"), \
sleep (n))
#endif
#ifdef __cplusplus
}
#endif
#endif /* _GL_UNISTD_H */
#endif /* _GL_UNISTD_H */
|