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/*
* blkid.c - User command-line interface for libblkid
*
* Copyright (C) 2001 Andreas Dilger
*
* %Begin-Header%
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
* %End-Header%
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
extern int getopt(int argc, char * const argv[], const char *optstring);
extern char *optarg;
extern int optind;
#endif
#define OUTPUT_VALUE_ONLY 0x0001
#define OUTPUT_DEVICE_ONLY 0x0002
#include "blkid/blkid.h"
const char *progname = "blkid";
static void print_version(FILE *out)
{
fprintf(out, "%s %s (%s)\n", progname, BLKID_VERSION, BLKID_DATE);
}
static void usage(int error)
{
FILE *out = error ? stderr : stdout;
print_version(out);
fprintf(out,
"usage:\t%s [-c <file>] [-ghl] [-o format] "
"[-s <tag>] [-t <token>]\n [-v] [-w <file>] [dev ...]\n"
"\t-c\tcache file (default: /etc/blkid.tab, /dev/null = none)\n"
"\t-h\tprint this usage message and exit\n"
"\t-g\tgarbage collect the blkid cache\n"
"\t-s\tshow specified tag(s) (default show all tags)\n"
"\t-t\tfind device with a specific token (NAME=value pair)\n"
"\t-l\tlookup the the first device with arguments specified by -t\n"
"\t-v\tprint version and exit\n"
"\t-w\twrite cache to different file (/dev/null = no write)\n"
"\tdev\tspecify device(s) to probe (default: all devices)\n",
progname);
exit(error);
}
static void print_tags(blkid_dev dev, char *show[], int numtag, int output)
{
blkid_tag_iterate iter;
const char *type, *value;
int i, first = 1;
if (!dev)
return;
if (output & OUTPUT_DEVICE_ONLY) {
printf("%s\n", blkid_dev_devname(dev));
return;
}
iter = blkid_tag_iterate_begin(dev);
while (blkid_tag_next(iter, &type, &value) == 0) {
if (numtag && show) {
for (i=0; i < numtag; i++)
if (!strcmp(type, show[i]))
break;
if (i >= numtag)
continue;
}
if (first && !(output & OUTPUT_VALUE_ONLY)) {
printf("%s: ", blkid_dev_devname(dev));
first = 0;
}
if ((output & OUTPUT_VALUE_ONLY))
printf("%s\n", value);
else
printf("%s=\"%s\" ", type, value);
}
blkid_tag_iterate_end(iter);
if (!first && !(output & OUTPUT_VALUE_ONLY))
printf("\n");
}
int main(int argc, char **argv)
{
blkid_cache cache = NULL;
char *devices[128] = { NULL, };
char *show[128] = { NULL, };
char *search_type = NULL, *search_value = NULL;
char *read = NULL;
char *write = NULL;
unsigned int numdev = 0, numtag = 0;
int version = 0;
int err = 4;
unsigned int i;
int output_format = 0;
int lookup = 0, gc = 0;
int c;
while ((c = getopt (argc, argv, "c:f:ghlo:s:t:w:v")) != EOF)
switch (c) {
case 'c':
if (optarg && !*optarg)
read = NULL;
else
read = optarg;
if (!write)
write = read;
break;
case 'l':
lookup++;
break;
case 'g':
gc = 1;
break;
case 'o':
if (!strcmp(optarg, "value"))
output_format = OUTPUT_VALUE_ONLY;
else if (!strcmp(optarg, "device"))
output_format = OUTPUT_DEVICE_ONLY;
else if (!strcmp(optarg, "full"))
output_format = 0;
else {
fprintf(stderr, "Invalid output format %s. Chose from value, device, or full\n", optarg);
exit(1);
}
break;
case 's':
if (numtag >= sizeof(show) / sizeof(*show)) {
fprintf(stderr, "Too many tags specified\n");
usage(err);
}
show[numtag++] = optarg;
break;
case 't':
if (search_type) {
fprintf(stderr, "Can only search for "
"one NAME=value pair\n");
usage(err);
}
if (blkid_parse_tag_string(optarg,
&search_type,
&search_value)) {
fprintf(stderr, "-t needs NAME=value pair\n");
usage(err);
}
break;
case 'v':
version = 1;
break;
case 'w':
if (optarg && !*optarg)
write = NULL;
else
write = optarg;
break;
case 'h':
err = 0;
default:
usage(err);
}
while (optind < argc)
devices[numdev++] = argv[optind++];
if (version) {
print_version(stdout);
goto exit;
}
if (blkid_get_cache(&cache, read) < 0)
goto exit;
err = 2;
if (gc) {
blkid_gc_cache(cache);
} else if (lookup) {
blkid_dev dev;
if (!search_type) {
fprintf(stderr, "The lookup option requires a "
"search type specified using -t\n");
exit(1);
}
/* Load any additional devices not in the cache */
for (i = 0; i < numdev; i++)
blkid_get_dev(cache, devices[i], BLKID_DEV_NORMAL);
if ((dev = blkid_find_dev_with_tag(cache, search_type,
search_value))) {
print_tags(dev, show, numtag, output_format);
err = 0;
}
/* If we didn't specify a single device, show all available devices */
} else if (!numdev) {
blkid_dev_iterate iter;
blkid_dev dev;
blkid_probe_all(cache);
iter = blkid_dev_iterate_begin(cache);
blkid_dev_set_search(iter, search_type, search_value);
while (blkid_dev_next(iter, &dev) == 0) {
dev = blkid_verify(cache, dev);
if (!dev)
continue;
print_tags(dev, show, numtag, output_format);
err = 0;
}
blkid_dev_iterate_end(iter);
/* Add all specified devices to cache (optionally display tags) */
} else for (i = 0; i < numdev; i++) {
blkid_dev dev = blkid_get_dev(cache, devices[i],
BLKID_DEV_NORMAL);
if (dev) {
if (search_type &&
!blkid_dev_has_tag(dev, search_type,
search_value))
continue;
print_tags(dev, show, numtag, output_format);
err = 0;
}
}
exit:
if (search_type)
free(search_type);
if (search_value)
free(search_value);
blkid_put_cache(cache);
return err;
}
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