1 /* Like <fcntl.h>, but with non-working flags defined to 0.
3 Copyright (C) 2006-2012 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 <http://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 #include <sys/types.h>
29 /* On some systems other than glibc, <sys/stat.h> is a prerequisite of
30 <fcntl.h>. On glibc systems, we would like to avoid namespace pollution.
31 But on glibc systems, <fcntl.h> includes <sys/stat.h> inside an
32 extern "C" { ... } block, which leads to errors in C++ mode with the
33 overridden <sys/stat.h> from gnulib. These errors are known to be gone
34 with g++ version >= 4.3. */
35 #if !(defined __GLIBC__ || defined __UCLIBC__) || (defined __cplusplus && defined GNULIB_NAMESPACE && !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)))
36 # include <sys/stat.h>
38 #@INCLUDE_NEXT@ @NEXT_FCNTL_H@
41 /* Normal invocation convention. */
43 #ifndef _@GUARD_PREFIX@_FCNTL_H
45 #include <sys/types.h>
46 /* On some systems other than glibc, <sys/stat.h> is a prerequisite of
47 <fcntl.h>. On glibc systems, we would like to avoid namespace pollution.
48 But on glibc systems, <fcntl.h> includes <sys/stat.h> inside an
49 extern "C" { ... } block, which leads to errors in C++ mode with the
50 overridden <sys/stat.h> from gnulib. These errors are known to be gone
51 with g++ version >= 4.3. */
52 #if !(defined __GLIBC__ || defined __UCLIBC__) || (defined __cplusplus && defined GNULIB_NAMESPACE && !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)))
53 # include <sys/stat.h>
55 /* The include_next requires a split double-inclusion guard. */
56 #@INCLUDE_NEXT@ @NEXT_FCNTL_H@
58 #ifndef _@GUARD_PREFIX@_FCNTL_H
59 #define _@GUARD_PREFIX@_FCNTL_H
61 #ifndef __GLIBC__ /* Avoid namespace pollution on glibc systems. */
65 /* Native Windows platforms declare open(), creat() in <io.h>. */
66 #if (@GNULIB_OPEN@ || defined GNULIB_POSIXCHECK) \
67 && ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
72 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
74 /* The definition of _GL_ARG_NONNULL is copied here. */
76 /* The definition of _GL_WARN_ON_USE is copied here. */
79 /* Declare overridden functions. */
83 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
85 # define fcntl rpl_fcntl
87 _GL_FUNCDECL_RPL (fcntl, int, (int fd, int action, ...));
88 _GL_CXXALIAS_RPL (fcntl, int, (int fd, int action, ...));
91 _GL_FUNCDECL_SYS (fcntl, int, (int fd, int action, ...));
93 _GL_CXXALIAS_SYS (fcntl, int, (int fd, int action, ...));
95 _GL_CXXALIASWARN (fcntl);
96 #elif defined GNULIB_POSIXCHECK
98 # if HAVE_RAW_DECL_FCNTL
99 _GL_WARN_ON_USE (fcntl, "fcntl is not always POSIX compliant - "
100 "use gnulib module fcntl for portability");
106 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
108 # define open rpl_open
110 _GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...)
111 _GL_ARG_NONNULL ((1)));
112 _GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...));
114 _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
116 /* On HP-UX 11, in C++ mode, open() is defined as an inline function with a
117 default argument. _GL_CXXALIASWARN does not work in this case. */
119 _GL_CXXALIASWARN (open);
121 #elif defined GNULIB_POSIXCHECK
123 /* Assume open is always declared. */
124 _GL_WARN_ON_USE (open, "open is not always POSIX compliant - "
125 "use gnulib module open for portability");
129 # if @REPLACE_OPENAT@
130 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
132 # define openat rpl_openat
134 _GL_FUNCDECL_RPL (openat, int,
135 (int fd, char const *file, int flags, /* mode_t mode */ ...)
136 _GL_ARG_NONNULL ((2)));
137 _GL_CXXALIAS_RPL (openat, int,
138 (int fd, char const *file, int flags, /* mode_t mode */ ...));
141 _GL_FUNCDECL_SYS (openat, int,
142 (int fd, char const *file, int flags, /* mode_t mode */ ...)
143 _GL_ARG_NONNULL ((2)));
145 _GL_CXXALIAS_SYS (openat, int,
146 (int fd, char const *file, int flags, /* mode_t mode */ ...));
148 _GL_CXXALIASWARN (openat);
149 #elif defined GNULIB_POSIXCHECK
151 # if HAVE_RAW_DECL_OPENAT
152 _GL_WARN_ON_USE (openat, "openat is not portable - "
153 "use gnulib module openat for portability");
158 /* Fix up the FD_* macros, only known to be missing on mingw. */
161 # define FD_CLOEXEC 1
164 /* Fix up the supported F_* macros. Intentionally leave other F_*
165 macros undefined. Only known to be missing on mingw. */
167 #ifndef F_DUPFD_CLOEXEC
168 # define F_DUPFD_CLOEXEC 0x40000000
169 /* Witness variable: 1 if gnulib defined F_DUPFD_CLOEXEC, 0 otherwise. */
170 # define GNULIB_defined_F_DUPFD_CLOEXEC 1
172 # define GNULIB_defined_F_DUPFD_CLOEXEC 0
183 /* Fix up the O_* macros. */
185 #if !defined O_DIRECT && defined O_DIRECTIO
186 /* Tru64 spells it 'O_DIRECTIO'. */
187 # define O_DIRECT O_DIRECTIO
190 #if !defined O_CLOEXEC && defined O_NOINHERIT
191 /* Mingw spells it 'O_NOINHERIT'. */
192 # define O_CLOEXEC O_NOINHERIT
204 # define O_DIRECTORY 0
212 # define O_EXEC O_RDONLY /* This is often close enough in older systems. */
224 # define O_NONBLOCK O_NDELAY
227 /* If the gnulib module 'nonblocking' is in use, guarantee a working non-zero
228 value of O_NONBLOCK. Otherwise, O_NONBLOCK is defined (above) to O_NDELAY
229 or to 0 as fallback. */
230 #if @GNULIB_NONBLOCKING@
232 # define GNULIB_defined_O_NONBLOCK 0
234 # define GNULIB_defined_O_NONBLOCK 1
236 # define O_NONBLOCK 0x40000000
245 # define O_NOFOLLOW 0
257 # define O_SEARCH O_RDONLY /* This is often close enough in older systems. */
265 # define O_TTY_INIT 0
268 #if O_ACCMODE != (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
270 # define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
273 /* For systems that distinguish between text and binary I/O.
274 O_BINARY is usually declared in fcntl.h */
275 #if !defined O_BINARY && defined _O_BINARY
276 /* For MSC-compatible compilers. */
277 # define O_BINARY _O_BINARY
278 # define O_TEXT _O_TEXT
281 #if defined __BEOS__ || defined __HAIKU__
282 /* BeOS 5 and Haiku have O_BINARY and O_TEXT, but they have no effect. */
292 /* Fix up the AT_* macros. */
294 /* Work around a bug in Solaris 9 and 10: AT_FDCWD is positive. Its
295 value exceeds INT_MAX, so its use as an int doesn't conform to the
296 C standard, and GCC and Sun C complain in some cases. If the bug
297 is present, undef AT_FDCWD here, so it can be redefined below. */
298 #if 0 < AT_FDCWD && AT_FDCWD == 0xffd19553
302 /* Use the same bit pattern as Solaris 9, but with the proper
303 signedness. The bit pattern is important, in case this actually is
304 Solaris with the above workaround. */
306 # define AT_FDCWD (-3041965)
309 /* Use the same values as Solaris 9. This shouldn't matter, but
310 there's no real reason to differ. */
311 #ifndef AT_SYMLINK_NOFOLLOW
312 # define AT_SYMLINK_NOFOLLOW 4096
316 # define AT_REMOVEDIR 1
319 /* Solaris 9 lacks these two, so just pick unique values. */
320 #ifndef AT_SYMLINK_FOLLOW
321 # define AT_SYMLINK_FOLLOW 2
325 # define AT_EACCESS 4
329 #endif /* _@GUARD_PREFIX@_FCNTL_H */
330 #endif /* _@GUARD_PREFIX@_FCNTL_H */