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 <errno.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 <errno.h>
20	#include <stdlib.h>
21	#include "fstype.h"
22
23	char *progname;
24
25	int main(int argc, char *argv[])
26	{
27	int fd = 0;
28	int rv;
29	const char *fstype;
30	const char *file = "stdin";
31	unsigned long long bytes;
32
33	progname = argv[0];
34
35	if (argc > 2) {
36	fprintf(stderr, "Usage: %s [file]\n", progname);
37	return 1;
38	}
39
40	if (argc > 1 && !(argv[1][0] == '-' && argv[1][1] == '\0')) {
41	fd = open(file = argv[1], O_RDONLY);
42	if (fd < 0) {
43	perror(argv[1]);
44	return 2;
45	}
46	}
47
48	rv = identify_fs(fd, &fstype, &bytes, 0);
49	if (rv == -1) {
50	perror(file);
51	return 2;
52	}
53
54	fstype = fstype ? fstype : "unknown";
55
56	fprintf(stdout, "FSTYPE=%s\nFSSIZE=%llu\n", fstype, bytes);
57	return rv;
58	}