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/*
** Copyright 1998 - 1999 Double Precision, Inc. See COPYING for
** distribution information.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#if HAVE_SYS_FCNTL_H
#include <sys/fcntl.h>
#endif
#if HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#include <errno.h>
#include "liblock.h"
int ll_lockfd(int fd, int ltype, LL_OFFSET_TYPE start, LL_OFFSET_TYPE len)
{
if (start || len
|| (ltype & ll_whence_curpos)
|| (ltype & ll_whence_end))
{
errno=EINVAL;
return (-1);
}
return (flock(fd, ltype & ll_unlock ? LOCK_UN:
(ltype & ll_writelock ? LOCK_EX:LOCK_SH) |
(ltype & ll_wait ? 0:LOCK_NB)));
}
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