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	niro	532	/*
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			}