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f240aacb LC |
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 */ |