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/*
* 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;
}
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