| /* Copyright (C) 1991-2016 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #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 */ |