klibc/tests/fcntl.c

/*
 * Simple test of fcntl
 */

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>

int main(int argc, char *argv[])
{
	int fd = open(argv[0], O_RDONLY);
	struct flock l;
	long flags;

	(void)argc;

	if (fd < 0) {
		perror("open");
		exit(1);
	}

	/* Get the flags on this FD */

	if ((flags = fcntl(fd, F_GETFL)) == -1) {
		perror("F_GETFL");
		exit(1);
	}

	if (flags != (O_RDONLY | O_LARGEFILE))
		fprintf(stderr, "flags = %#lx\n", flags);

	/* Set a lock on this FD */
	memset(&l, 0, sizeof l);
	l.l_type = F_RDLCK;
	l.l_whence = SEEK_SET;
	l.l_start = 123;
	l.l_len = 456;

	if (fcntl(fd, F_SETLK, &l) == -1) {
		perror("F_SETLK");
		exit(1);
	}

	/* Eventually, fork and try to conflict with this lock... */

	return 0;
}
1	niro	532	/*
2			* Simple test of fcntl
3			*/
4
5			#include <stdio.h>
6			#include <unistd.h>
7			#include <fcntl.h>
8			#include <errno.h>
9			#include <stdlib.h>
10			#include <string.h>
11
12			int main(int argc, char *argv[])
13			{
14			int fd = open(argv[0], O_RDONLY);
15			struct flock l;
16			long flags;
17
18			(void)argc;
19
20			if (fd < 0) {
21			perror("open");
22			exit(1);
23			}
24
25			/* Get the flags on this FD */
26
27			if ((flags = fcntl(fd, F_GETFL)) == -1) {
28			perror("F_GETFL");
29			exit(1);
30			}
31
32			if (flags != (O_RDONLY \| O_LARGEFILE))
33			fprintf(stderr, "flags = %#lx\n", flags);
34
35			/* Set a lock on this FD */
36			memset(&l, 0, sizeof l);
37			l.l_type = F_RDLCK;
38			l.l_whence = SEEK_SET;
39			l.l_start = 123;
40			l.l_len = 456;
41
42			if (fcntl(fd, F_SETLK, &l) == -1) {
43			perror("F_SETLK");
44			exit(1);
45			}
46
47			/* Eventually, fork and try to conflict with this lock... */
48
49			return 0;
50			}