Improve special-casing of `_' in `-Wformat'.
[bpt/guile.git] / lib / fcntl.in.h
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1/* Like <fcntl.h>, but with non-working flags defined to 0.
2
f0007cad 3 Copyright (C) 2006-2012 Free Software Foundation, Inc.
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4
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser 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.
9
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 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 <http://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#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>
37#endif
38#@INCLUDE_NEXT@ @NEXT_FCNTL_H@
39
40#else
41/* Normal invocation convention. */
42
43#ifndef _@GUARD_PREFIX@_FCNTL_H
44
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>
54#endif
55/* The include_next requires a split double-inclusion guard. */
56#@INCLUDE_NEXT@ @NEXT_FCNTL_H@
57
58#ifndef _@GUARD_PREFIX@_FCNTL_H
59#define _@GUARD_PREFIX@_FCNTL_H
60
61#ifndef __GLIBC__ /* Avoid namespace pollution on glibc systems. */
62# include <unistd.h>
63#endif
64
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65/* Native Windows platforms declare open(), creat() in <io.h>. */
66#if (@GNULIB_OPEN@ || defined GNULIB_POSIXCHECK) \
67 && ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
68# include <io.h>
69#endif
70
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71
72/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
73
74/* The definition of _GL_ARG_NONNULL is copied here. */
75
76/* The definition of _GL_WARN_ON_USE is copied here. */
77
78
79/* Declare overridden functions. */
80
81#if @GNULIB_FCNTL@
82# if @REPLACE_FCNTL@
83# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
84# undef fcntl
85# define fcntl rpl_fcntl
86# endif
87_GL_FUNCDECL_RPL (fcntl, int, (int fd, int action, ...));
88_GL_CXXALIAS_RPL (fcntl, int, (int fd, int action, ...));
89# else
90# if !@HAVE_FCNTL@
91_GL_FUNCDECL_SYS (fcntl, int, (int fd, int action, ...));
92# endif
93_GL_CXXALIAS_SYS (fcntl, int, (int fd, int action, ...));
94# endif
95_GL_CXXALIASWARN (fcntl);
96#elif defined GNULIB_POSIXCHECK
97# undef fcntl
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");
101# endif
102#endif
103
104#if @GNULIB_OPEN@
105# if @REPLACE_OPEN@
106# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
107# undef open
108# define open rpl_open
109# endif
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, ...));
113# else
114_GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
115# endif
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. */
118# if !defined __hpux
119_GL_CXXALIASWARN (open);
120# endif
121#elif defined GNULIB_POSIXCHECK
122# undef open
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");
126#endif
127
128#if @GNULIB_OPENAT@
129# if @REPLACE_OPENAT@
130# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
131# undef openat
132# define openat rpl_openat
133# endif
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 */ ...));
139# else
140# if !@HAVE_OPENAT@
141_GL_FUNCDECL_SYS (openat, int,
142 (int fd, char const *file, int flags, /* mode_t mode */ ...)
143 _GL_ARG_NONNULL ((2)));
144# endif
145_GL_CXXALIAS_SYS (openat, int,
146 (int fd, char const *file, int flags, /* mode_t mode */ ...));
147# endif
148_GL_CXXALIASWARN (openat);
149#elif defined GNULIB_POSIXCHECK
150# undef openat
151# if HAVE_RAW_DECL_OPENAT
152_GL_WARN_ON_USE (openat, "openat is not portable - "
153 "use gnulib module openat for portability");
154# endif
155#endif
156
157
158/* Fix up the FD_* macros, only known to be missing on mingw. */
159
160#ifndef FD_CLOEXEC
161# define FD_CLOEXEC 1
162#endif
163
164/* Fix up the supported F_* macros. Intentionally leave other F_*
165 macros undefined. Only known to be missing on mingw. */
166
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
171#else
172# define GNULIB_defined_F_DUPFD_CLOEXEC 0
173#endif
174
175#ifndef F_DUPFD
176# define F_DUPFD 1
177#endif
178
179#ifndef F_GETFD
180# define F_GETFD 2
181#endif
182
183/* Fix up the O_* macros. */
184
185#if !defined O_DIRECT && defined O_DIRECTIO
f0007cad 186/* Tru64 spells it 'O_DIRECTIO'. */
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187# define O_DIRECT O_DIRECTIO
188#endif
189
190#if !defined O_CLOEXEC && defined O_NOINHERIT
f0007cad 191/* Mingw spells it 'O_NOINHERIT'. */
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192# define O_CLOEXEC O_NOINHERIT
193#endif
194
195#ifndef O_CLOEXEC
196# define O_CLOEXEC 0
197#endif
198
199#ifndef O_DIRECT
200# define O_DIRECT 0
201#endif
202
203#ifndef O_DIRECTORY
204# define O_DIRECTORY 0
205#endif
206
207#ifndef O_DSYNC
208# define O_DSYNC 0
209#endif
210
211#ifndef O_EXEC
212# define O_EXEC O_RDONLY /* This is often close enough in older systems. */
213#endif
214
215#ifndef O_NDELAY
216# define O_NDELAY 0
217#endif
218
219#ifndef O_NOATIME
220# define O_NOATIME 0
221#endif
222
223#ifndef O_NONBLOCK
224# define O_NONBLOCK O_NDELAY
225#endif
226
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@
231# if O_NONBLOCK
232# define GNULIB_defined_O_NONBLOCK 0
233# else
234# define GNULIB_defined_O_NONBLOCK 1
235# undef O_NONBLOCK
236# define O_NONBLOCK 0x40000000
237# endif
238#endif
239
240#ifndef O_NOCTTY
241# define O_NOCTTY 0
242#endif
243
244#ifndef O_NOFOLLOW
245# define O_NOFOLLOW 0
246#endif
247
248#ifndef O_NOLINKS
249# define O_NOLINKS 0
250#endif
251
252#ifndef O_RSYNC
253# define O_RSYNC 0
254#endif
255
256#ifndef O_SEARCH
257# define O_SEARCH O_RDONLY /* This is often close enough in older systems. */
258#endif
259
260#ifndef O_SYNC
261# define O_SYNC 0
262#endif
263
264#ifndef O_TTY_INIT
265# define O_TTY_INIT 0
266#endif
267
268#if O_ACCMODE != (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
269# undef O_ACCMODE
270# define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
271#endif
272
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
279#endif
280
281#if defined __BEOS__ || defined __HAIKU__
282 /* BeOS 5 and Haiku have O_BINARY and O_TEXT, but they have no effect. */
283# undef O_BINARY
284# undef O_TEXT
285#endif
286
287#ifndef O_BINARY
288# define O_BINARY 0
289# define O_TEXT 0
290#endif
291
292/* Fix up the AT_* macros. */
293
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
299# undef AT_FDCWD
300#endif
301
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. */
305#ifndef AT_FDCWD
306# define AT_FDCWD (-3041965)
307#endif
308
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
313#endif
314
315#ifndef AT_REMOVEDIR
316# define AT_REMOVEDIR 1
317#endif
318
319/* Solaris 9 lacks these two, so just pick unique values. */
320#ifndef AT_SYMLINK_FOLLOW
321# define AT_SYMLINK_FOLLOW 2
322#endif
323
324#ifndef AT_EACCESS
325# define AT_EACCESS 4
326#endif
327
328
329#endif /* _@GUARD_PREFIX@_FCNTL_H */
330#endif /* _@GUARD_PREFIX@_FCNTL_H */
331#endif