kinit/fstype/main.c

/*
 * by rmk
 *
 * Detect filesystem type (on stdin) and output strings for two
 * environment variables:
 *  FSTYPE - filesystem type
 *  FSSIZE - filesystem size (if known)
 *
 * We currently detect (in order):
 *  gzip, cramfs, romfs, xfs, minix, ext3, ext2, reiserfs, jfs
 *
 * MINIX, ext3 and Reiserfs bits are currently untested.
 */

#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include "fstype.h"

char *progname;

int main(int argc, char *argv[])
{
	int fd = 0;
	int rv;
	const char *fstype;
	const char *file = "stdin";
	unsigned long long bytes;

	progname = argv[0];

	if (argc > 2) {
		fprintf(stderr, "Usage: %s [file]\n", progname);
		return 1;
	}

	if (argc > 1 && !(argv[1][0] == '-' && argv[1][1] == '\0')) {
		fd = open(file = argv[1], O_RDONLY);
		if (fd < 0) {
			perror(argv[1]);
			return 2;
		}
	}

	rv = identify_fs(fd, &fstype, &bytes, 0);
	if (rv == -1) {
		perror(file);
		return 2;
	}

	fstype = fstype ? fstype : "unknown";

	fprintf(stdout, "FSTYPE=%s\nFSSIZE=%llu\n", fstype, bytes);
	return rv;
}
1	/*
2	* by rmk
3	*
4	* Detect filesystem type (on stdin) and output strings for two
5	* environment variables:
6	* FSTYPE - filesystem type
7	* FSSIZE - filesystem size (if known)
8	*
9	* We currently detect (in order):
10	* gzip, cramfs, romfs, xfs, minix, ext3, ext2, reiserfs, jfs
11	*
12	* MINIX, ext3 and Reiserfs bits are currently untested.
13	*/
14
15	#include <stdio.h>
16	#include <fcntl.h>
17	#include <unistd.h>
18	#include <string.h>
19	#include <stdlib.h>
20	#include "fstype.h"
21
22	char *progname;
23
24	int main(int argc, char *argv[])
25	{
26	int fd = 0;
27	int rv;
28	const char *fstype;
29	const char *file = "stdin";
30	unsigned long long bytes;
31
32	progname = argv[0];
33
34	if (argc > 2) {
35	fprintf(stderr, "Usage: %s [file]\n", progname);
36	return 1;
37	}
38
39	if (argc > 1 && !(argv[1][0] == '-' && argv[1][1] == '\0')) {
40	fd = open(file = argv[1], O_RDONLY);
41	if (fd < 0) {
42	perror(argv[1]);
43	return 2;
44	}
45	}
46
47	rv = identify_fs(fd, &fstype, &bytes, 0);
48	if (rv == -1) {
49	perror(file);
50	return 2;
51	}
52
53	fstype = fstype ? fstype : "unknown";
54
55	fprintf(stdout, "FSTYPE=%s\nFSSIZE=%llu\n", fstype, bytes);
56	return rv;
57	}