lib/fcntl.in.h

   1 /* Like <fcntl.h>, but with non-working flags defined to 0.
   2
   3    Copyright (C) 2006-2012 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 /* 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
  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
 186 /* Tru64 spells it 'O_DIRECTIO'.  */
 187 # define O_DIRECT O_DIRECTIO
 188 #endif
 189
 190 #if !defined O_CLOEXEC && defined O_NOINHERIT
 191 /* Mingw spells it 'O_NOINHERIT'.  */
 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