lib/sys_file.in.h

   1 /* Provide a more complete sys/file.h.
   2
   3    Copyright (C) 2007-2012 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 2, or (at your option)
   8    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, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 /* Written by Richard W.M. Jones.  */
  20
  21 #ifndef _@GUARD_PREFIX@_SYS_FILE_H
  22
  23 #if __GNUC__ >= 3
  24 @PRAGMA_SYSTEM_HEADER@
  25 #endif
  26 @PRAGMA_COLUMNS@
  27
  28 /* The include_next requires a split double-inclusion guard.  */
  29 #if @HAVE_SYS_FILE_H@
  30 # @INCLUDE_NEXT@ @NEXT_SYS_FILE_H@
  31 #endif
  32
  33 #ifndef _@GUARD_PREFIX@_SYS_FILE_H
  34 #define _@GUARD_PREFIX@_SYS_FILE_H
  35
  36 #ifndef LOCK_SH
  37 /* Operations for the 'flock' call (same as Linux kernel constants).  */
  38 # define LOCK_SH 1       /* Shared lock.  */
  39 # define LOCK_EX 2       /* Exclusive lock.  */
  40 # define LOCK_UN 8       /* Unlock.  */
  41
  42 /* Can be OR'd in to one of the above.  */
  43 # define LOCK_NB 4       /* Don't block when locking.  */
  44 #endif
  45
  46 /* The definition of _GL_WARN_ON_USE is copied here.  */
  47
  48 #if @GNULIB_FLOCK@
  49 /* Apply or remove advisory locks on an open file.
  50    Return 0 if successful, otherwise -1 and errno set.  */
  51 # if !@HAVE_FLOCK@
  52 extern int flock (int fd, int operation);
  53 # endif
  54 #elif defined GNULIB_POSIXCHECK
  55 # undef flock
  56 # if HAVE_RAW_DECL_FLOCK
  57 _GL_WARN_ON_USE (flock, "flock is unportable - "
  58                  "use gnulib module flock for portability");
  59 # endif
  60 #endif
  61
  62
  63 #endif /* _@GUARD_PREFIX@_SYS_FILE_H */
  64 #endif /* _@GUARD_PREFIX@_SYS_FILE_H */