1 /* Like <fcntl.h>, but with non-working flags defined to 0.
2
3 Copyright (C) 2006-2022 Free Software Foundation, Inc.
4
5 This file is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
9
10 This file 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 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
17
18 /* written by Paul Eggert */
19
20 #if __GNUC__ >= 3
21 @PRAGMA_SYSTEM_HEADER@
22 #endif
23 @PRAGMA_COLUMNS@
24
25 #if defined __need_system_fcntl_h
26 /* Special invocation convention. */
27
28 /* Needed before <sys/stat.h>.
29 May also define off_t to a 64-bit type on native Windows. */
30 #include <sys/types.h>
31 /* On some systems other than glibc, <sys/stat.h> is a prerequisite of
32 <fcntl.h>. On glibc systems, we would like to avoid namespace pollution.
33 But on glibc systems, <fcntl.h> includes <sys/stat.h> inside an
34 extern "C" { ... } block, which leads to errors in C++ mode with the
35 overridden <sys/stat.h> from gnulib. These errors are known to be gone
36 with g++ version >= 4.3. */
37 #if !(defined __GLIBC__ || defined __UCLIBC__) || (defined __cplusplus && defined GNULIB_NAMESPACE && (defined __ICC || !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))))
38 # include <sys/stat.h>
39 #endif
40 #@INCLUDE_NEXT@ @NEXT_FCNTL_H@
41
42 /* Native Windows platforms declare open(), creat() in <io.h>. */
43 #if (@GNULIB_CREAT@ || @GNULIB_OPEN@ || defined GNULIB_POSIXCHECK) \
44 && (defined _WIN32 && ! defined __CYGWIN__)
45 # include <io.h>
46 #endif
47
48 #else
49 /* Normal invocation convention. */
50
51 #ifndef _@GUARD_PREFIX@_FCNTL_H
52
53 /* Needed before <sys/stat.h>.
54 May also define off_t to a 64-bit type on native Windows. */
55 #include <sys/types.h>
56 /* On some systems other than glibc, <sys/stat.h> is a prerequisite of
57 <fcntl.h>. On glibc systems, we would like to avoid namespace pollution.
58 But on glibc systems, <fcntl.h> includes <sys/stat.h> inside an
59 extern "C" { ... } block, which leads to errors in C++ mode with the
60 overridden <sys/stat.h> from gnulib. These errors are known to be gone
61 with g++ version >= 4.3. */
62 #if !(defined __GLIBC__ || defined __UCLIBC__) || (defined __cplusplus && defined GNULIB_NAMESPACE && (defined __ICC || !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))))
63 # include <sys/stat.h>
64 #endif
65 /* The include_next requires a split double-inclusion guard. */
66 #@INCLUDE_NEXT@ @NEXT_FCNTL_H@
67
68 /* Native Windows platforms declare open(), creat() in <io.h>. */
69 #if (@GNULIB_CREAT@ || @GNULIB_OPEN@ || defined GNULIB_POSIXCHECK) \
70 && (defined _WIN32 && ! defined __CYGWIN__)
71 # include <io.h>
72 #endif
73
74 #ifndef _@GUARD_PREFIX@_FCNTL_H
75 #define _@GUARD_PREFIX@_FCNTL_H
76
77 #ifndef __GLIBC__ /* Avoid namespace pollution on glibc systems. */
78 # include <unistd.h>
79 #endif
80
81
82 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
83
84 /* The definition of _GL_ARG_NONNULL is copied here. */
85
86 /* The definition of _GL_WARN_ON_USE is copied here. */
87
88
89 /* Declare overridden functions. */
90
91 #if @GNULIB_CREAT@
92 # if @REPLACE_CREAT@
93 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
94 # undef creat
95 # define creat rpl_creat
96 # endif
97 _GL_FUNCDECL_RPL (creat, int, (const char *filename, mode_t mode)
98 _GL_ARG_NONNULL ((1)));
99 _GL_CXXALIAS_RPL (creat, int, (const char *filename, mode_t mode));
100 # elif defined _WIN32 && !defined __CYGWIN__
101 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
102 # undef creat
103 # define creat _creat
104 # endif
105 _GL_CXXALIAS_MDA (creat, int, (const char *filename, mode_t mode));
106 # else
107 _GL_CXXALIAS_SYS (creat, int, (const char *filename, mode_t mode));
108 # endif
109 _GL_CXXALIASWARN (creat);
110 #elif defined GNULIB_POSIXCHECK
111 # undef creat
112 /* Assume creat is always declared. */
113 _GL_WARN_ON_USE (creat, "creat is not always POSIX compliant - "
114 "use gnulib module creat for portability");
115 #elif @GNULIB_MDA_CREAT@
116 /* On native Windows, map 'creat' to '_creat', so that -loldnames is not
117 required. In C++ with GNULIB_NAMESPACE, avoid differences between
118 platforms by defining GNULIB_NAMESPACE::creat always. */
119 # if defined _WIN32 && !defined __CYGWIN__
120 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
121 # undef creat
122 # define creat _creat
123 # endif
124 /* Need to cast, because in mingw the last argument is 'int mode'. */
125 _GL_CXXALIAS_MDA_CAST (creat, int, (const char *filename, mode_t mode));
126 # else
127 _GL_CXXALIAS_SYS (creat, int, (const char *filename, mode_t mode));
128 # endif
129 _GL_CXXALIASWARN (creat);
130 #endif
131
132 #if @GNULIB_FCNTL@
133 # if @REPLACE_FCNTL@
134 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
135 # undef fcntl
136 # define fcntl rpl_fcntl
137 # endif
138 _GL_FUNCDECL_RPL (fcntl, int, (int fd, int action, ...));
139 _GL_CXXALIAS_RPL (fcntl, int, (int fd, int action, ...));
140 # if !GNULIB_defined_rpl_fcntl
141 # define GNULIB_defined_rpl_fcntl 1
142 # endif
143 # else
144 # if !@HAVE_FCNTL@
145 _GL_FUNCDECL_SYS (fcntl, int, (int fd, int action, ...));
146 # if !GNULIB_defined_fcntl
147 # define GNULIB_defined_fcntl 1
148 # endif
149 # endif
150 _GL_CXXALIAS_SYS (fcntl, int, (int fd, int action, ...));
151 # endif
152 _GL_CXXALIASWARN (fcntl);
153 #elif defined GNULIB_POSIXCHECK
154 # undef fcntl
155 # if HAVE_RAW_DECL_FCNTL
156 _GL_WARN_ON_USE (fcntl, "fcntl is not always POSIX compliant - "
157 "use gnulib module fcntl for portability");
158 # endif
159 #endif
160
161 #if @GNULIB_OPEN@
162 # if @REPLACE_OPEN@
163 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
164 # undef open
165 # define open rpl_open
166 # endif
167 _GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...)
168 _GL_ARG_NONNULL ((1)));
169 _GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...));
170 # elif defined _WIN32 && !defined __CYGWIN__
171 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
172 # undef open
173 # define open _open
174 # endif
175 _GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...));
176 # else
177 _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
178 # endif
179 /* On HP-UX 11, in C++ mode, open() is defined as an inline function with a
180 default argument. _GL_CXXALIASWARN does not work in this case. */
181 # if !defined __hpux
182 _GL_CXXALIASWARN (open);
183 # endif
184 #elif defined GNULIB_POSIXCHECK
185 # undef open
186 /* Assume open is always declared. */
187 _GL_WARN_ON_USE (open, "open is not always POSIX compliant - "
188 "use gnulib module open for portability");
189 #elif @GNULIB_MDA_OPEN@
190 /* On native Windows, map 'open' to '_open', so that -loldnames is not
191 required. In C++ with GNULIB_NAMESPACE, avoid differences between
192 platforms by defining GNULIB_NAMESPACE::open always. */
193 # if defined _WIN32 && !defined __CYGWIN__
194 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
195 # undef open
196 # define open _open
197 # endif
198 _GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...));
199 # else
200 _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
201 # endif
202 # if !defined __hpux
203 _GL_CXXALIASWARN (open);
204 # endif
205 #endif
206
207 #if @GNULIB_OPENAT@
208 # if @REPLACE_OPENAT@
209 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
210 # undef openat
211 # define openat rpl_openat
212 # endif
213 _GL_FUNCDECL_RPL (openat, int,
214 (int fd, char const *file, int flags, /* mode_t mode */ ...)
215 _GL_ARG_NONNULL ((2)));
216 _GL_CXXALIAS_RPL (openat, int,
217 (int fd, char const *file, int flags, /* mode_t mode */ ...));
218 # else
219 # if !@HAVE_OPENAT@
220 _GL_FUNCDECL_SYS (openat, int,
221 (int fd, char const *file, int flags, /* mode_t mode */ ...)
222 _GL_ARG_NONNULL ((2)));
223 # endif
224 _GL_CXXALIAS_SYS (openat, int,
225 (int fd, char const *file, int flags, /* mode_t mode */ ...));
226 # endif
227 _GL_CXXALIASWARN (openat);
228 #elif defined GNULIB_POSIXCHECK
229 # undef openat
230 # if HAVE_RAW_DECL_OPENAT
231 _GL_WARN_ON_USE (openat, "openat is not portable - "
232 "use gnulib module openat for portability");
233 # endif
234 #endif
235
236
237 /* Fix up the FD_* macros, only known to be missing on mingw. */
238
239 #ifndef FD_CLOEXEC
240 # define FD_CLOEXEC 1
241 #endif
242
243 /* Fix up the supported F_* macros. Intentionally leave other F_*
244 macros undefined. Only known to be missing on mingw. */
245
246 #ifndef F_DUPFD_CLOEXEC
247 # define F_DUPFD_CLOEXEC 0x40000000
248 /* Witness variable: 1 if gnulib defined F_DUPFD_CLOEXEC, 0 otherwise. */
249 # define GNULIB_defined_F_DUPFD_CLOEXEC 1
250 #else
251 # define GNULIB_defined_F_DUPFD_CLOEXEC 0
252 #endif
253
254 #ifndef F_DUPFD
255 # define F_DUPFD 1
256 #endif
257
258 #ifndef F_GETFD
259 # define F_GETFD 2
260 #endif
261
262 /* Fix up the O_* macros. */
263
264 /* AIX 7.1 with XL C 12.1 defines O_CLOEXEC, O_NOFOLLOW, and O_TTY_INIT
265 to values outside 'int' range, so omit these misdefinitions.
266 But avoid namespace pollution on non-AIX systems. */
267 #ifdef _AIX
268 # include <limits.h>
269 # if defined O_CLOEXEC && ! (INT_MIN <= O_CLOEXEC && O_CLOEXEC <= INT_MAX)
270 # undef O_CLOEXEC
271 # endif
272 # if defined O_NOFOLLOW && ! (INT_MIN <= O_NOFOLLOW && O_NOFOLLOW <= INT_MAX)
273 # undef O_NOFOLLOW
274 # endif
275 # if defined O_TTY_INIT && ! (INT_MIN <= O_TTY_INIT && O_TTY_INIT <= INT_MAX)
276 # undef O_TTY_INIT
277 # endif
278 #endif
279
280 #if !defined O_DIRECT && defined O_DIRECTIO
281 /* Tru64 spells it 'O_DIRECTIO'. */
282 # define O_DIRECT O_DIRECTIO
283 #endif
284
285 #if !defined O_CLOEXEC && defined O_NOINHERIT
286 /* Mingw spells it 'O_NOINHERIT'. */
287 # define O_CLOEXEC O_NOINHERIT
288 #endif
289
290 #ifndef O_CLOEXEC
291 # define O_CLOEXEC 0x40000000 /* Try to not collide with system O_* flags. */
292 # define GNULIB_defined_O_CLOEXEC 1
293 #else
294 # define GNULIB_defined_O_CLOEXEC 0
295 #endif
296
297 #ifndef O_DIRECT
298 # define O_DIRECT 0
299 #endif
300
301 #ifndef O_DIRECTORY
302 # define O_DIRECTORY 0
303 #endif
304
305 #ifndef O_DSYNC
306 # define O_DSYNC 0
307 #endif
308
309 #ifndef O_EXEC
310 # define O_EXEC O_RDONLY /* This is often close enough in older systems. */
311 #endif
312
313 #ifndef O_IGNORE_CTTY
314 # define O_IGNORE_CTTY 0
315 #endif
316
317 #ifndef O_NDELAY
318 # define O_NDELAY 0
319 #endif
320
321 #ifndef O_NOATIME
322 # define O_NOATIME 0
323 #endif
324
325 #ifndef O_NONBLOCK
326 # define O_NONBLOCK O_NDELAY
327 #endif
328
329 /* If the gnulib module 'nonblocking' is in use, guarantee a working non-zero
330 value of O_NONBLOCK. Otherwise, O_NONBLOCK is defined (above) to O_NDELAY
331 or to 0 as fallback. */
332 #if @GNULIB_NONBLOCKING@
333 # if O_NONBLOCK
334 # define GNULIB_defined_O_NONBLOCK 0
335 # else
336 # define GNULIB_defined_O_NONBLOCK 1
337 # undef O_NONBLOCK
338 # define O_NONBLOCK 0x40000000
339 # endif
340 #endif
341
342 #ifndef O_NOCTTY
343 # define O_NOCTTY 0
344 #endif
345
346 #ifndef O_NOFOLLOW
347 # define O_NOFOLLOW 0
348 #endif
349
350 #ifndef O_NOLINK
351 # define O_NOLINK 0
352 #endif
353
354 #ifndef O_NOLINKS
355 # define O_NOLINKS 0
356 #endif
357
358 #ifndef O_NOTRANS
359 # define O_NOTRANS 0
360 #endif
361
362 #ifndef O_RSYNC
363 # define O_RSYNC 0
364 #endif
365
366 #ifndef O_SEARCH
367 # define O_SEARCH O_RDONLY /* This is often close enough in older systems. */
368 #endif
369
370 #ifndef O_SYNC
371 # define O_SYNC 0
372 #endif
373
374 #ifndef O_TTY_INIT
375 # define O_TTY_INIT 0
376 #endif
377
378 #if ~O_ACCMODE & (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
379 # undef O_ACCMODE
380 # define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
381 #endif
382
383 /* For systems that distinguish between text and binary I/O.
384 O_BINARY is usually declared in fcntl.h */
385 #if !defined O_BINARY && defined _O_BINARY
386 /* For MSC-compatible compilers. */
387 # define O_BINARY _O_BINARY
388 # define O_TEXT _O_TEXT
389 #endif
390
391 #if defined __BEOS__ || defined __HAIKU__
392 /* BeOS 5 and Haiku have O_BINARY and O_TEXT, but they have no effect. */
393 # undef O_BINARY
394 # undef O_TEXT
395 #endif
396
397 #ifndef O_BINARY
398 # define O_BINARY 0
399 # define O_TEXT 0
400 #endif
401
402 /* Fix up the AT_* macros. */
403
404 /* Work around a bug in Solaris 9 and 10: AT_FDCWD is positive. Its
405 value exceeds INT_MAX, so its use as an int doesn't conform to the
406 C standard, and GCC and Sun C complain in some cases. If the bug
407 is present, undef AT_FDCWD here, so it can be redefined below. */
408 #if 0 < AT_FDCWD && AT_FDCWD == 0xffd19553
409 # undef AT_FDCWD
410 #endif
411
412 /* Use the same bit pattern as Solaris 9, but with the proper
413 signedness. The bit pattern is important, in case this actually is
414 Solaris with the above workaround. */
415 #ifndef AT_FDCWD
416 # define AT_FDCWD (-3041965)
417 #endif
418
419 /* Use the same values as Solaris 9. This shouldn't matter, but
420 there's no real reason to differ. */
421 #ifndef AT_SYMLINK_NOFOLLOW
422 # define AT_SYMLINK_NOFOLLOW 4096
423 #endif
424
425 #ifndef AT_REMOVEDIR
426 # define AT_REMOVEDIR 1
427 #endif
428
429 /* Solaris 9 lacks these two, so just pick unique values. */
430 #ifndef AT_SYMLINK_FOLLOW
431 # define AT_SYMLINK_FOLLOW 2
432 #endif
433
434 #ifndef AT_EACCESS
435 # define AT_EACCESS 4
436 #endif
437
438 /* Ignore this flag if not supported. */
439 #ifndef AT_NO_AUTOMOUNT
440 # define AT_NO_AUTOMOUNT 0
441 #endif
442
443 #endif /* _@GUARD_PREFIX@_FCNTL_H */
444 #endif /* _@GUARD_PREFIX@_FCNTL_H */
445 #endif