| 1 | /* Provide a more complete sys/file.h. |
| 2 | |
| 3 | Copyright (C) 2007-2008 Free Software Foundation, Inc. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU Lesser General Public License as published by |
| 7 | the Free Software Foundation; either version 2, or (at your option) |
| 8 | any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public License |
| 16 | along with this program; if not, write to the Free Software Foundation, |
| 17 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 18 | |
| 19 | /* Written by Richard W.M. Jones. */ |
| 20 | #ifndef _GL_SYS_FILE_H |
| 21 | |
| 22 | # if __GNUC__ >= 3 |
| 23 | @PRAGMA_SYSTEM_HEADER@ |
| 24 | # endif |
| 25 | |
| 26 | /* The include_next requires a split double-inclusion guard. */ |
| 27 | # if @HAVE_SYS_FILE_H@ |
| 28 | # @INCLUDE_NEXT@ @NEXT_SYS_FILE_H@ |
| 29 | # endif |
| 30 | |
| 31 | #ifndef _GL_SYS_FILE_H |
| 32 | #define _GL_SYS_FILE_H |
| 33 | |
| 34 | |
| 35 | #if @GNULIB_FLOCK@ |
| 36 | /* Apply or remove advisory locks on an open file. |
| 37 | Return 0 if successful, otherwise -1 and errno set. */ |
| 38 | # if !@HAVE_FLOCK@ |
| 39 | extern int flock (int fd, int operation); |
| 40 | |
| 41 | /* Operations for the 'flock' call (same as Linux kernel constants). */ |
| 42 | #define LOCK_SH 1 /* Shared lock. */ |
| 43 | #define LOCK_EX 2 /* Exclusive lock. */ |
| 44 | #define LOCK_UN 8 /* Unlock. */ |
| 45 | |
| 46 | /* Can be OR'd in to one of the above. */ |
| 47 | #define LOCK_NB 4 /* Don't block when locking. */ |
| 48 | |
| 49 | # endif |
| 50 | #elif defined GNULIB_POSIXCHECK |
| 51 | # undef flock |
| 52 | # define flock(fd,op) \ |
| 53 | (GL_LINK_WARNING ("flock is unportable - " \ |
| 54 | "use gnulib module flock for portability"), \ |
| 55 | flock ((fd), (op))) |
| 56 | #endif |
| 57 | |
| 58 | |
| 59 | #endif /* _GL_SYS_FILE_H */ |
| 60 | #endif /* _GL_SYS_FILE_H */ |