lib/fcntl.in.h

   1 /* Like <fcntl.h>, but with non-working flags defined to 0.
   2
   3    Copyright (C) 2006-2011 Free Software Foundation, Inc.
   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
  65
  66 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
  67
  68 /* The definition of _GL_ARG_NONNULL is copied here.  */
  69
  70 /* The definition of _GL_WARN_ON_USE is copied here.  */
  71
  72
  73 /* Declare overridden functions.  */
  74
  75 #if @GNULIB_FCNTL@
  76 # if @REPLACE_FCNTL@
  77 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
  78 #   undef fcntl
  79 #   define fcntl rpl_fcntl
  80 #  endif
  81 _GL_FUNCDECL_RPL (fcntl, int, (int fd, int action, ...));
  82 _GL_CXXALIAS_RPL (fcntl, int, (int fd, int action, ...));
  83 # else
  84 #  if !@HAVE_FCNTL@
  85 _GL_FUNCDECL_SYS (fcntl, int, (int fd, int action, ...));
  86 #  endif
  87 _GL_CXXALIAS_SYS (fcntl, int, (int fd, int action, ...));
  88 # endif
  89 _GL_CXXALIASWARN (fcntl);
  90 #elif defined GNULIB_POSIXCHECK
  91 # undef fcntl
  92 # if HAVE_RAW_DECL_FCNTL
  93 _GL_WARN_ON_USE (fcntl, "fcntl is not always POSIX compliant - "
  94                  "use gnulib module fcntl for portability");
  95 # endif
  96 #endif
  97
  98 #if @GNULIB_OPEN@
  99 # if @REPLACE_OPEN@
 100 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 101 #   undef open
 102 #   define open rpl_open
 103 #  endif
 104 _GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...)
 105                              _GL_ARG_NONNULL ((1)));
 106 _GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...));
 107 # else
 108 _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
 109 # endif
 110 /* On HP-UX 11, in C++ mode, open() is defined as an inline function with a
 111    default argument.  _GL_CXXALIASWARN does not work in this case.  */
 112 # if !defined __hpux
 113 _GL_CXXALIASWARN (open);
 114 # endif
 115 #elif defined GNULIB_POSIXCHECK
 116 # undef open
 117 /* Assume open is always declared.  */
 118 _GL_WARN_ON_USE (open, "open is not always POSIX compliant - "
 119                  "use gnulib module open for portability");
 120 #endif
 121
 122 #if @GNULIB_OPENAT@
 123 # if @REPLACE_OPENAT@
 124 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 125 #   undef openat
 126 #   define openat rpl_openat
 127 #  endif
 128 _GL_FUNCDECL_RPL (openat, int,
 129                   (int fd, char const *file, int flags, /* mode_t mode */ ...)
 130                   _GL_ARG_NONNULL ((2)));
 131 _GL_CXXALIAS_RPL (openat, int,
 132                   (int fd, char const *file, int flags, /* mode_t mode */ ...));
 133 # else
 134 #  if !@HAVE_OPENAT@
 135 _GL_FUNCDECL_SYS (openat, int,
 136                   (int fd, char const *file, int flags, /* mode_t mode */ ...)
 137                   _GL_ARG_NONNULL ((2)));
 138 #  endif
 139 _GL_CXXALIAS_SYS (openat, int,
 140                   (int fd, char const *file, int flags, /* mode_t mode */ ...));
 141 # endif
 142 _GL_CXXALIASWARN (openat);
 143 #elif defined GNULIB_POSIXCHECK
 144 # undef openat
 145 # if HAVE_RAW_DECL_OPENAT
 146 _GL_WARN_ON_USE (openat, "openat is not portable - "
 147                  "use gnulib module openat for portability");
 148 # endif
 149 #endif
 150
 151
 152 /* Fix up the FD_* macros, only known to be missing on mingw.  */
 153
 154 #ifndef FD_CLOEXEC
 155 # define FD_CLOEXEC 1
 156 #endif
 157
 158 /* Fix up the supported F_* macros.  Intentionally leave other F_*
 159    macros undefined.  Only known to be missing on mingw.  */
 160
 161 #ifndef F_DUPFD_CLOEXEC
 162 # define F_DUPFD_CLOEXEC 0x40000000
 163 /* Witness variable: 1 if gnulib defined F_DUPFD_CLOEXEC, 0 otherwise.  */
 164 # define GNULIB_defined_F_DUPFD_CLOEXEC 1
 165 #else
 166 # define GNULIB_defined_F_DUPFD_CLOEXEC 0
 167 #endif
 168
 169 #ifndef F_DUPFD
 170 # define F_DUPFD 1
 171 #endif
 172
 173 #ifndef F_GETFD
 174 # define F_GETFD 2
 175 #endif
 176
 177 /* Fix up the O_* macros.  */
 178
 179 #if !defined O_DIRECT && defined O_DIRECTIO
 180 /* Tru64 spells it `O_DIRECTIO'.  */
 181 # define O_DIRECT O_DIRECTIO
 182 #endif
 183
 184 #if !defined O_CLOEXEC && defined O_NOINHERIT
 185 /* Mingw spells it `O_NOINHERIT'.  */
 186 # define O_CLOEXEC O_NOINHERIT
 187 #endif
 188
 189 #ifndef O_CLOEXEC
 190 # define O_CLOEXEC 0
 191 #endif
 192
 193 #ifndef O_DIRECT
 194 # define O_DIRECT 0
 195 #endif
 196
 197 #ifndef O_DIRECTORY
 198 # define O_DIRECTORY 0
 199 #endif
 200
 201 #ifndef O_DSYNC
 202 # define O_DSYNC 0
 203 #endif
 204
 205 #ifndef O_EXEC
 206 # define O_EXEC O_RDONLY /* This is often close enough in older systems.  */
 207 #endif
 208
 209 #ifndef O_NDELAY
 210 # define O_NDELAY 0
 211 #endif
 212
 213 #ifndef O_NOATIME
 214 # define O_NOATIME 0
 215 #endif
 216
 217 #ifndef O_NONBLOCK
 218 # define O_NONBLOCK O_NDELAY
 219 #endif
 220
 221 /* If the gnulib module 'nonblocking' is in use, guarantee a working non-zero
 222    value of O_NONBLOCK.  Otherwise, O_NONBLOCK is defined (above) to O_NDELAY
 223    or to 0 as fallback.  */
 224 #if @GNULIB_NONBLOCKING@
 225 # if O_NONBLOCK
 226 #  define GNULIB_defined_O_NONBLOCK 0
 227 # else
 228 #  define GNULIB_defined_O_NONBLOCK 1
 229 #  undef O_NONBLOCK
 230 #  define O_NONBLOCK 0x40000000
 231 # endif
 232 #endif
 233
 234 #ifndef O_NOCTTY
 235 # define O_NOCTTY 0
 236 #endif
 237
 238 #ifndef O_NOFOLLOW
 239 # define O_NOFOLLOW 0
 240 #endif
 241
 242 #ifndef O_NOLINKS
 243 # define O_NOLINKS 0
 244 #endif
 245
 246 #ifndef O_RSYNC
 247 # define O_RSYNC 0
 248 #endif
 249
 250 #ifndef O_SEARCH
 251 # define O_SEARCH O_RDONLY /* This is often close enough in older systems.  */
 252 #endif
 253
 254 #ifndef O_SYNC
 255 # define O_SYNC 0
 256 #endif
 257
 258 #ifndef O_TTY_INIT
 259 # define O_TTY_INIT 0
 260 #endif
 261
 262 #if O_ACCMODE != (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
 263 # undef O_ACCMODE
 264 # define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
 265 #endif
 266
 267 /* For systems that distinguish between text and binary I/O.
 268    O_BINARY is usually declared in fcntl.h  */
 269 #if !defined O_BINARY && defined _O_BINARY
 270   /* For MSC-compatible compilers.  */
 271 # define O_BINARY _O_BINARY
 272 # define O_TEXT _O_TEXT
 273 #endif
 274
 275 #if defined __BEOS__ || defined __HAIKU__
 276   /* BeOS 5 and Haiku have O_BINARY and O_TEXT, but they have no effect.  */
 277 # undef O_BINARY
 278 # undef O_TEXT
 279 #endif
 280
 281 #ifndef O_BINARY
 282 # define O_BINARY 0
 283 # define O_TEXT 0
 284 #endif
 285
 286 /* Fix up the AT_* macros.  */
 287
 288 /* Work around a bug in Solaris 9 and 10: AT_FDCWD is positive.  Its
 289    value exceeds INT_MAX, so its use as an int doesn't conform to the
 290    C standard, and GCC and Sun C complain in some cases.  If the bug
 291    is present, undef AT_FDCWD here, so it can be redefined below.  */
 292 #if 0 < AT_FDCWD && AT_FDCWD == 0xffd19553
 293 # undef AT_FDCWD
 294 #endif
 295
 296 /* Use the same bit pattern as Solaris 9, but with the proper
 297    signedness.  The bit pattern is important, in case this actually is
 298    Solaris with the above workaround.  */
 299 #ifndef AT_FDCWD
 300 # define AT_FDCWD (-3041965)
 301 #endif
 302
 303 /* Use the same values as Solaris 9.  This shouldn't matter, but
 304    there's no real reason to differ.  */
 305 #ifndef AT_SYMLINK_NOFOLLOW
 306 # define AT_SYMLINK_NOFOLLOW 4096
 307 #endif
 308
 309 #ifndef AT_REMOVEDIR
 310 # define AT_REMOVEDIR 1
 311 #endif
 312
 313 /* Solaris 9 lacks these two, so just pick unique values.  */
 314 #ifndef AT_SYMLINK_FOLLOW
 315 # define AT_SYMLINK_FOLLOW 2
 316 #endif
 317
 318 #ifndef AT_EACCESS
 319 # define AT_EACCESS 4
 320 #endif
 321
 322
 323 #endif /* _@GUARD_PREFIX@_FCNTL_H */
 324 #endif /* _@GUARD_PREFIX@_FCNTL_H */
 325 #endif