lib/sys_file.in.h

   1 /* Provide a more complete sys/file.h.
   2
   3    Copyright (C) 2007-2024 Free Software Foundation, Inc.
   4
   5    This file is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    License, or (at your option) any later version.
   9
  10    This file 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 <https://www.gnu.org/licenses/>.  */
  17
  18 /* Written by Richard W.M. Jones.  */
  19
  20 #ifndef _@GUARD_PREFIX@_SYS_FILE_H
  21
  22 #if __GNUC__ >= 3
  23 @PRAGMA_SYSTEM_HEADER@
  24 #endif
  25 @PRAGMA_COLUMNS@
  26
  27 /* The include_next requires a split double-inclusion guard.  */
  28 #if @HAVE_SYS_FILE_H@
  29 # @INCLUDE_NEXT@ @NEXT_SYS_FILE_H@
  30 #endif
  31
  32 #ifndef _@GUARD_PREFIX@_SYS_FILE_H
  33 #define _@GUARD_PREFIX@_SYS_FILE_H
  34
  35 /* This file uses GNULIB_POSIXCHECK, HAVE_RAW_DECL_*.  */
  36 #if !_GL_CONFIG_H_INCLUDED
  37  #error "Please include config.h first."
  38 #endif
  39
  40 #ifndef LOCK_SH
  41 /* Operations for the 'flock' call (same as Linux kernel constants).  */
  42 # define LOCK_SH 1       /* Shared lock.  */
  43 # define LOCK_EX 2       /* Exclusive lock.  */
  44 # define LOCK_UN 8       /* Unlock.  */
  45
  46 /* Can be OR'd into one of the above.  */
  47 # define LOCK_NB 4       /* Don't block when locking.  */
  48 #endif
  49
  50 /* The definition of _GL_WARN_ON_USE is copied here.  */
  51
  52 #if @GNULIB_FLOCK@
  53 /* Apply or remove advisory locks on an open file.
  54    Return 0 if successful, otherwise -1 and errno set.  */
  55 # if !@HAVE_FLOCK@
  56 extern int flock (int fd, int operation);
  57 # endif
  58 #elif defined GNULIB_POSIXCHECK
  59 # undef flock
  60 # if HAVE_RAW_DECL_FLOCK
  61 _GL_WARN_ON_USE (flock, "flock is unportable - "
  62                  "use gnulib module flock for portability");
  63 # endif
  64 #endif
  65
  66
  67 #endif /* _@GUARD_PREFIX@_SYS_FILE_H */
  68 #endif /* _@GUARD_PREFIX@_SYS_FILE_H */