d9898ee8 |
1 | /* |
2 | ** Copyright 1998 - 1999 Double Precision, Inc. See COPYING for |
3 | ** distribution information. |
4 | */ |
5 | |
6 | /* $Id: lockflock.c,v 1.3 1999/12/06 13:18:55 mrsam Exp $ */ |
7 | #if HAVE_CONFIG_H |
8 | #include "config.h" |
9 | #endif |
10 | #include <sys/types.h> |
11 | #if HAVE_FCNTL_H |
12 | #include <fcntl.h> |
13 | #endif |
14 | #if HAVE_SYS_FCNTL_H |
15 | #include <sys/fcntl.h> |
16 | #endif |
17 | #if HAVE_SYS_FILE_H |
18 | #include <sys/file.h> |
19 | #endif |
20 | #include <errno.h> |
21 | #include "liblock.h" |
22 | |
23 | int ll_lockfd(int fd, int ltype, LL_OFFSET_TYPE start, LL_OFFSET_TYPE len) |
24 | { |
25 | if (start || len |
26 | || (ltype & ll_whence_curpos) |
27 | || (ltype & ll_whence_end)) |
28 | { |
29 | errno=EINVAL; |
30 | return (-1); |
31 | } |
32 | |
33 | return (flock(fd, ltype & ll_unlock ? LOCK_UN: |
34 | (ltype & ll_writelock ? LOCK_EX:LOCK_SH) | |
35 | (ltype & ll_wait ? 0:LOCK_NB))); |
36 | } |