lockflock.c
上传用户:s81996212
上传日期:2007-01-04
资源大小:722k
文件大小:1k
- /*
- ** Copyright 1998 - 1999 Double Precision, Inc. See COPYING for
- ** distribution information.
- */
- /* $Id: lockflock.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_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)));
- }