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/*
** Copyright 1998 - 1999 Double Precision, Inc. See COPYING for
** distribution information.
*/
/* $Id: locklockf.c,v 1.3 1999/12/06 13:18:55 mrsam Exp $ */
#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_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_ERRNO_H
#include <errno.h>
#endif
#include "liblock.h"
int ll_lockfd(int fd, int ltype, LL_OFFSET_TYPE start, LL_OFFSET_TYPE len)
{
off_t p;
if (!(ltype & ll_writelock))
{
errno=EINVAL;
return (-1);
}
if (ltype & ll_whence_curpos)
p=lseek(fd, start, SEEK_CUR);
else if (ltype && ll_whence_end)
p=lseek(fd, start, SEEK_END);
else p=lseek(fd, start, SEEK_SET);
if (p < 0) return (-1);
if (lockf(fd, ltype & ll_unlock ? F_ULOCK:
ltype & ll_wait ? F_LOCK:F_TLOCK, len))
{
lseek(fd, p, SEEK_SET);
return (-1);
}
lseek(fd, SEEK_SET, p);
return (0);
}
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