1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/* This is file FILE.H */
/*
** Copyright (C) 1991 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954
**
** This file is distributed under the terms listed in the document
** "copying.dj", available from DJ Delorie at the address above.
** A copy of "copying.dj" should accompany this file; if not, a copy
** should be available from where this file was obtained. This file
** may not be distributed without a verbatim copy of "copying.dj".
**
** This file is distributed WITHOUT ANY WARRANTY; without even the implied
** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
/*
* 2003-11-27 Nicholas Wourms <nwourms@netscape.net>:
*
* Include sys/cdefs.h. Add function prototype for flock().
* Add some comments from BSD's header for further clarity.
* (L_SET, L_CURR, L_INCR, L_XTND): Redefine as the macros
* SEEK_SET, SEEK_CUR, SEEK_CUR, & SEEK_END respectively.
* (LOCK_SH,LOCK_EX,LOCK_NB,LOCK_UN): New macros for flock().
*/
#ifndef _FILE_H_
#define _FILE_H_
#include <sys/cdefs.h>
#include <fcntl.h>
/* Whence values for lseek(); renamed by POSIX 1003.1 */
#define L_SET SEEK_SET
#define L_CURR SEEK_CUR
#define L_INCR SEEK_CUR
#define L_XTND SEEK_END
/* Operations for flock() function */
#define LOCK_SH 1 /* Shared lock. */
#define LOCK_EX 2 /* Exclusive lock. */
#define LOCK_NB 4 /* Don't block when locking. */
#define LOCK_UN 8 /* Unlock. */
/* Operations for access function */
#define F_OK 0 /* does file exist */
#define X_OK 1 /* is it executable or searchable by caller */
#define W_OK 2 /* is it writable by caller */
#define R_OK 4 /* is it readable by caller */
/* Apply or remove an advisory lock on the file fd refers to. */
__BEGIN_DECLS
int _EXFUN(flock, (int, int));
__END_DECLS
#endif
|
