| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1991, 92, 96, 97, 98, 99 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, write to the Free |
| 16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 17 | 02111-1307 USA. */ |
| 18 | |
| 19 | #ifndef _SYS_FILE_H |
| 20 | #define _SYS_FILE_H 1 |
| 21 | |
| 22 | #include <features.h> |
| 23 | |
| 24 | #ifndef _FCNTL_H |
| 25 | # include <fcntl.h> |
| 26 | #endif |
| 27 | |
| 28 | __BEGIN_DECLS |
| 29 | |
| 30 | |
| 31 | /* Alternate names for values for the WHENCE argument to `lseek'. |
| 32 | These are the same as SEEK_SET, SEEK_CUR, and SEEK_END, respectively. */ |
| 33 | #ifndef L_SET |
| 34 | # define L_SET 0 /* Seek from beginning of file. */ |
| 35 | # define L_INCR 1 /* Seek from current position. */ |
| 36 | # define L_XTND 2 /* Seek from end of file. */ |
| 37 | #endif |
| 38 | |
| 39 | |
| 40 | /* Operations for the `flock' call. */ |
| 41 | #define LOCK_SH 1 /* Shared lock. */ |
| 42 | #define LOCK_EX 2 /* Exclusive lock. */ |
| 43 | #define LOCK_UN 8 /* Unlock. */ |
| 44 | |
| 45 | /* Can be OR'd in to one of the above. */ |
| 46 | #define LOCK_NB 4 /* Don't block when locking. */ |
| 47 | |
| 48 | |
| 49 | /* Apply or remove an advisory lock, according to OPERATION, |
| 50 | on the file FD refers to. */ |
| 51 | extern int flock (int __fd, int __operation) __THROW; |
| 52 | |
| 53 | |
| 54 | __END_DECLS |
| 55 | |
| 56 | #endif /* sys/file.h */ |