| /* |
| * 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 char *optarg; |
| extern int optind; |
| #endif |
| |
| #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>] [-h] " |
| "[-p] [-s <tag>] [-t <token>] [-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-s\tshow specified tag(s) (default show all tags)\n" |
| "\t-t\tfind device with a specific token (NAME=value pair)\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) |
| { |
| blkid_tag_iterate iter; |
| const char *type, *value; |
| int i, first = 1; |
| |
| if (!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) { |
| printf("%s: ", blkid_dev_devname(dev)); |
| first = 0; |
| } |
| printf("%s=\"%s\" ", type, value); |
| } |
| blkid_tag_iterate_end(iter); |
| |
| if (!first) |
| 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; |
| char c; |
| |
| while ((c = getopt (argc, argv, "c:f:hps:t:w:v")) != EOF) |
| switch (c) { |
| case 'c': |
| if (optarg && !*optarg) |
| read = NULL; |
| else |
| read = optarg; |
| if (!write) |
| write = read; |
| 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 looking for a specific NAME=value pair, print only that */ |
| if (search_type) { |
| blkid_dev dev; |
| |
| /* 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); |
| 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); |
| while (blkid_dev_next(iter, &dev) == 0) { |
| print_tags(dev, show, numtag); |
| 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) { |
| print_tags(dev, show, numtag); |
| err = 0; |
| } |
| } |
| |
| exit: |
| if (search_type) |
| free(search_type); |
| if (search_value) |
| free(search_value); |
| blkid_put_cache(cache); |
| return err; |
| } |