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1 | /* |
2 | ** Copyright 1998 - 1999 Double Precision, Inc. See COPYING for |
3 | ** distribution information. |
4 | */ |
5 | |
6 | /* $Id: lockfcntl.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 | #include "liblock.h" |
18 | |
19 | int ll_lockfd(int fd, int ltype, LL_OFFSET_TYPE start, LL_OFFSET_TYPE len) |
20 | { |
21 | #if HAS_FLOCK_T |
22 | flock_t ft; |
23 | #else |
24 | struct flock ft; |
25 | #endif |
26 | |
27 | ft.l_type=ltype & ll_unlock ? F_UNLCK: |
28 | ltype & ll_writelock ? F_WRLCK:F_RDLCK; |
29 | ft.l_whence=ltype & ll_whence_curpos ? 1: |
30 | ltype & ll_whence_end ? 2:0; |
31 | ft.l_start=start; |
32 | ft.l_len=len; |
33 | |
34 | return (fcntl(fd, (ltype & ll_unlock) == 0 && (ltype & ll_wait) |
35 | ? F_SETLKW:F_SETLK, &ft)); |
36 | } |