file.h
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上传日期:2009-04-28
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- /* Copyright (C) 1991, 92, 96, 97, 98, 99 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library 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
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #ifndef _SYS_FILE_H
- #define _SYS_FILE_H 1
- #include <features.h>
- #ifndef _FCNTL_H
- # include <fcntl.h>
- #endif
- __BEGIN_DECLS
- /* Alternate names for values for the WHENCE argument to `lseek'.
- These are the same as SEEK_SET, SEEK_CUR, and SEEK_END, respectively. */
- #ifndef L_SET
- # define L_SET 0 /* Seek from beginning of file. */
- # define L_INCR 1 /* Seek from current position. */
- # define L_XTND 2 /* Seek from end of file. */
- #endif
- /* Operations for the `flock' call. */
- #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. */
- /* Apply or remove an advisory lock, according to OPERATION,
- on the file FD refers to. */
- extern int flock (int __fd, int __operation) __THROW;
- __END_DECLS
- #endif /* sys/file.h */