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/* Provide a more complete sys/file.h.
Copyright (C) 2007-2009 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/* Written by Richard W.M. Jones. */
#ifndef _GL_SYS_FILE_H
# if __GNUC__ >= 3
@PRAGMA_SYSTEM_HEADER@
# endif
/* The include_next requires a split double-inclusion guard. */
# if @HAVE_SYS_FILE_H@
# @INCLUDE_NEXT@ @NEXT_SYS_FILE_H@
# endif
#ifndef _GL_SYS_FILE_H
#define _GL_SYS_FILE_H
#ifndef LOCK_SH
/* Operations for the 'flock' call (same as Linux kernel constants). */
# define LOCK_SH 1 /* Shared lock. */
# define LOCK_EX 2 /* Exclusive lock. */
# define LOCK_UN 8 /* Unlock. */
/* Can be OR'd in to one of the above. */
# define LOCK_NB 4 /* Don't block when locking. */
#endif
/* The definition of GL_LINK_WARNING is copied here. */
#if @GNULIB_FLOCK@
/* Apply or remove advisory locks on an open file.
Return 0 if successful, otherwise -1 and errno set. */
# if !@HAVE_FLOCK@
extern int flock (int fd, int operation);
# endif
#elif defined GNULIB_POSIXCHECK
# undef flock
# define flock(fd,op) \
(GL_LINK_WARNING ("flock is unportable - " \
"use gnulib module flock for portability"), \
flock ((fd), (op)))
#endif
#endif /* _GL_SYS_FILE_H */
#endif /* _GL_SYS_FILE_H */
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