blob: e0249f5c69af457edb8e4d69f8c76e8528d03a32 (
plain)
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
|
/* Library routines
*
* Porting to Minix 2.0.0
* Author: Giovanni Falzoni <gfalzoni@pointest.com>
*/
#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <sys/types.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
/*
* Name: int flock(int fd, int mode);
* Function: Implements the flock function in Minix.
*/
int flock(int fd, int mode)
{
struct flock lck;
memset((void *) &lck, 0, sizeof(struct flock));
switch (mode & ~LOCK_NB) {
case LOCK_SH: lck.l_type = F_RDLCK; break;
case LOCK_EX: lck.l_type = F_WRLCK; break;
case LOCK_UN: lck.l_type = F_UNLCK; break;
default: errno = EINVAL; return -1;
}
return fcntl(fd, mode & LOCK_NB ? F_SETLK : F_SETLKW, &lck);
}
/** flock.c **/
|
