1 /* Like <fcntl.h>, but with non-working flags defined to 0.
3 Copyright (C) 2006-2020 Free Software Foundation, Inc.
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 <https://www.gnu.org/licenses/>. */
18 /* written by Paul Eggert */
21 @PRAGMA_SYSTEM_HEADER@
25 #if defined __need_system_fcntl_h
26 /* Special invocation convention. */
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>
40 #@INCLUDE_NEXT@ @NEXT_FCNTL_H@
42 /* Native Windows platforms declare open(), creat() in <io.h>. */
43 #if (@GNULIB_CREAT@ || @GNULIB_OPEN@ || defined GNULIB_POSIXCHECK) \
44 && (defined _WIN32 && ! defined __CYGWIN__)
49 /* Normal invocation convention. */
51 #ifndef _@GUARD_PREFIX@_FCNTL_H
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>
65 /* The include_next requires a split double-inclusion guard. */
66 #@INCLUDE_NEXT@ @NEXT_FCNTL_H@
68 /* Native Windows platforms declare open(), creat() in <io.h>. */
69 #if (@GNULIB_CREAT@ || @GNULIB_OPEN@ || defined GNULIB_POSIXCHECK) \
70 && (defined _WIN32 && ! defined __CYGWIN__)
74 #ifndef _@GUARD_PREFIX@_FCNTL_H
75 #define _@GUARD_PREFIX@_FCNTL_H
77 #ifndef __GLIBC__ /* Avoid namespace pollution on glibc systems. */
82 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
84 /* The definition of _GL_ARG_NONNULL is copied here. */
86 /* The definition of _GL_WARN_ON_USE is copied here. */
89 /* Declare overridden functions. */
93 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
95 # define creat rpl_creat
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)
103 # define creat _creat
105 _GL_CXXALIAS_MDA (creat
, int, (const char *filename
, mode_t mode
));
107 _GL_CXXALIAS_SYS (creat
, int, (const char *filename
, mode_t mode
));
109 _GL_CXXALIASWARN (creat
);
110 #elif defined GNULIB_POSIXCHECK
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");
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)
122 # define creat _creat
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
));
127 _GL_CXXALIAS_SYS (creat
, int, (const char *filename
, mode_t mode
));
129 _GL_CXXALIASWARN (creat
);
134 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
136 # define fcntl rpl_fcntl
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
145 _GL_FUNCDECL_SYS (fcntl
, int, (int fd
, int action
, ...));
146 # if !GNULIB_defined_fcntl
147 # define GNULIB_defined_fcntl 1
150 _GL_CXXALIAS_SYS (fcntl
, int, (int fd
, int action
, ...));
152 _GL_CXXALIASWARN (fcntl
);
153 #elif defined GNULIB_POSIXCHECK
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");
163 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
165 # define open rpl_open
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)
175 _GL_CXXALIAS_MDA (open
, int, (const char *filename
, int flags
, ...));
177 _GL_CXXALIAS_SYS (open
, int, (const char *filename
, int flags
, ...));
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. */
182 _GL_CXXALIASWARN (open
);
184 #elif defined GNULIB_POSIXCHECK
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");
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)
198 _GL_CXXALIAS_MDA (open
, int, (const char *filename
, int flags
, ...));
200 _GL_CXXALIAS_SYS (open
, int, (const char *filename
, int flags
, ...));
203 _GL_CXXALIASWARN (open
);
208 # if @REPLACE_OPENAT@
209 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
211 # define openat rpl_openat
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 */ ...));
220 _GL_FUNCDECL_SYS (openat
, int,
221 (int fd
, char const *file
, int flags
, /* mode_t mode */ ...)
222 _GL_ARG_NONNULL ((2)));
224 _GL_CXXALIAS_SYS (openat
, int,
225 (int fd
, char const *file
, int flags
, /* mode_t mode */ ...));
227 _GL_CXXALIASWARN (openat
);
228 #elif defined GNULIB_POSIXCHECK
230 # if HAVE_RAW_DECL_OPENAT
231 _GL_WARN_ON_USE (openat
, "openat is not portable - "
232 "use gnulib module openat for portability");
237 /* Fix up the FD_* macros, only known to be missing on mingw. */
240 # define FD_CLOEXEC 1
243 /* Fix up the supported F_* macros. Intentionally leave other F_*
244 macros undefined. Only known to be missing on mingw. */
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
251 # define GNULIB_defined_F_DUPFD_CLOEXEC 0
262 /* Fix up the O_* macros. */
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. */
269 # if defined O_CLOEXEC && ! (INT_MIN <= O_CLOEXEC && O_CLOEXEC <= INT_MAX)
272 # if defined O_NOFOLLOW && ! (INT_MIN <= O_NOFOLLOW && O_NOFOLLOW <= INT_MAX)
275 # if defined O_TTY_INIT && ! (INT_MIN <= O_TTY_INIT && O_TTY_INIT <= INT_MAX)
280 #if !defined O_DIRECT && defined O_DIRECTIO
281 /* Tru64 spells it 'O_DIRECTIO'. */
282 # define O_DIRECT O_DIRECTIO
285 #if !defined O_CLOEXEC && defined O_NOINHERIT
286 /* Mingw spells it 'O_NOINHERIT'. */
287 # define O_CLOEXEC O_NOINHERIT
291 # define O_CLOEXEC 0x40000000 /* Try to not collide with system O_* flags. */
292 # define GNULIB_defined_O_CLOEXEC 1
294 # define GNULIB_defined_O_CLOEXEC 0
302 # define O_DIRECTORY 0
310 # define O_EXEC O_RDONLY /* This is often close enough in older systems. */
313 #ifndef O_IGNORE_CTTY
314 # define O_IGNORE_CTTY 0
326 # define O_NONBLOCK O_NDELAY
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@
334 # define GNULIB_defined_O_NONBLOCK 0
336 # define GNULIB_defined_O_NONBLOCK 1
338 # define O_NONBLOCK 0x40000000
347 # define O_NOFOLLOW 0
367 # define O_SEARCH O_RDONLY /* This is often close enough in older systems. */
375 # define O_TTY_INIT 0
378 #if ~O_ACCMODE & (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
380 # define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
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
391 #if defined __BEOS__ || defined __HAIKU__
392 /* BeOS 5 and Haiku have O_BINARY and O_TEXT, but they have no effect. */
402 /* Fix up the AT_* macros. */
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
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. */
416 # define AT_FDCWD (-3041965)
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
426 # define AT_REMOVEDIR 1
429 /* Solaris 9 lacks these two, so just pick unique values. */
430 #ifndef AT_SYMLINK_FOLLOW
431 # define AT_SYMLINK_FOLLOW 2
435 # define AT_EACCESS 4
439 #endif /* _@GUARD_PREFIX@_FCNTL_H */
440 #endif /* _@GUARD_PREFIX@_FCNTL_H */