1 /*
2 * blkid.c - User command-line interface for libblkid
3 *
4 * Copyright (C) 2001 Andreas Dilger
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the
8 * GNU Lesser General Public License.
9 * %End-Header%
10 */
11
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <unistd.h>
15 #include <string.h>
16 #include <sys/types.h>
17 #include <sys/stat.h>
18 #include <fcntl.h>
19 #include <errno.h>
20 #ifdef HAVE_GETOPT_H
21 #include <getopt.h>
22 #else
23 extern int getopt(int argc, char * const argv[], const char *optstring);
24 extern char *optarg;
25 extern int optind;
26 #endif
27
28 #define OUTPUT_VALUE_ONLY (1 << 1)
29 #define OUTPUT_DEVICE_ONLY (1 << 2)
30 #define OUTPUT_PRETTY_LIST (1 << 3) /* deprecated */
31 #define OUTPUT_UDEV_LIST (1 << 4) /* deprecated */
32 #define OUTPUT_EXPORT_LIST (1 << 5)
33
34 #define LOWPROBE_TOPOLOGY (1 << 1)
35 #define LOWPROBE_SUPERBLOCKS (1 << 2)
36
37 #define BLKID_EXIT_NOTFOUND 2 /* token or device not found */
38 #define BLKID_EXIT_OTHER 4 /* bad usage or other error */
39 #define BLKID_EXIT_AMBIVAL 8 /* ambivalent low-level probing detected */
40
41 #include <blkid.h>
42
43 #include "ismounted.h"
44
45 #define STRTOXX_EXIT_CODE BLKID_EXIT_OTHER /* strtoxx_or_err() */
46 #include "strutils.h"
47 #define OPTUTILS_EXIT_CODE BLKID_EXIT_OTHER /* exclusive_option() */
48 #include "optutils.h"
49
50 #include "closestream.h"
51 #include "ttyutils.h"
52 #include "xalloc.h"
53
54 int raw_chars;
55
print_version(FILE * out)56 static void print_version(FILE *out)
57 {
58 fprintf(out, "%s from %s (libblkid %s, %s)\n",
59 program_invocation_short_name, PACKAGE_STRING,
60 LIBBLKID_VERSION, LIBBLKID_DATE);
61 }
62
usage(int error)63 static void usage(int error)
64 {
65 FILE *out = error ? stderr : stdout;
66
67 print_version(out);
68 fprintf(out,
69 "Usage:\n"
70 " %1$s -L <label> | -U <uuid>\n\n"
71 " %1$s [-c <file>] [-ghlLv] [-o <format>] [-s <tag>] \n"
72 " [-t <token>] [<dev> ...]\n\n"
73 " %1$s -p [-s <tag>] [-O <offset>] [-S <size>] \n"
74 " [-o <format>] <dev> ...\n\n"
75 " %1$s -i [-s <tag>] [-o <format>] <dev> ...\n\n"
76 "Options:\n"
77 " -c <file> read from <file> instead of reading from the default\n"
78 " cache file (-c /dev/null means no cache)\n"
79 " -d don't encode non-printing characters\n"
80 " -h print this usage message and exit\n"
81 " -g garbage collect the blkid cache\n"
82 " -o <format> output format; can be one of:\n"
83 " value, device, export or full; (default: full)\n"
84 " -k list all known filesystems/RAIDs and exit\n"
85 " -s <tag> show specified tag(s) (default show all tags)\n"
86 " -t <token> find device with a specific token (NAME=value pair)\n"
87 " -l look up only first device with token specified by -t\n"
88 " -L <label> convert LABEL to device name\n"
89 " -U <uuid> convert UUID to device name\n"
90 " -V print version and exit\n"
91 " <dev> specify device(s) to probe (default: all devices)\n\n"
92 "Low-level probing options:\n"
93 " -p low-level superblocks probing (bypass cache)\n"
94 " -i gather information about I/O limits\n"
95 " -S <size> overwrite device size\n"
96 " -O <offset> probe at the given offset\n"
97 " -u <list> filter by \"usage\" (e.g. -u filesystem,raid)\n"
98 " -n <list> filter by filesystem type (e.g. -n vfat,ext3)\n"
99 "\n", program_invocation_short_name);
100
101 exit(error);
102 }
103
104 /*
105 * This function does "safe" printing. It will convert non-printable
106 * ASCII characters using '^' and M- notation.
107 *
108 * If 'esc' is defined then escape all chars from esc by \.
109 */
safe_print(const char * cp,int len,const char * esc)110 static void safe_print(const char *cp, int len, const char *esc)
111 {
112 unsigned char ch;
113
114 if (len < 0)
115 len = strlen(cp);
116
117 while (len--) {
118 ch = *cp++;
119 if (!raw_chars) {
120 if (ch >= 128) {
121 fputs("M-", stdout);
122 ch -= 128;
123 }
124 if ((ch < 32) || (ch == 0x7f)) {
125 fputc('^', stdout);
126 ch ^= 0x40; /* ^@, ^A, ^B; ^? for DEL */
127
128 } else if (esc && strchr(esc, ch))
129 fputc('\\', stdout);
130 }
131 fputc(ch, stdout);
132 }
133 }
134
pretty_print_word(const char * str,int max_len,int left_len,int overflow_nl)135 static int pretty_print_word(const char *str, int max_len,
136 int left_len, int overflow_nl)
137 {
138 int len = strlen(str) + left_len;
139 int ret = 0;
140
141 fputs(str, stdout);
142 if (overflow_nl && len > max_len) {
143 fputc('\n', stdout);
144 len = 0;
145 } else if (len > max_len)
146 ret = len - max_len;
147 do
148 fputc(' ', stdout);
149 while (len++ < max_len);
150 return ret;
151 }
152
pretty_print_line(const char * device,const char * fs_type,const char * label,const char * mtpt,const char * uuid)153 static void pretty_print_line(const char *device, const char *fs_type,
154 const char *label, const char *mtpt,
155 const char *uuid)
156 {
157 static int device_len = 10, fs_type_len = 7;
158 static int label_len = 8, mtpt_len = 14;
159 static int term_width = -1;
160 int len, w;
161
162 if (term_width < 0) {
163 term_width = get_terminal_width();
164 if (term_width <= 0)
165 term_width = 80;
166 }
167 if (term_width > 80) {
168 term_width -= 80;
169 w = term_width / 10;
170 if (w > 8)
171 w = 8;
172 term_width -= 2*w;
173 label_len += w;
174 fs_type_len += w;
175 w = term_width/2;
176 device_len += w;
177 mtpt_len +=w;
178 }
179
180 len = pretty_print_word(device, device_len, 0, 1);
181 len = pretty_print_word(fs_type, fs_type_len, len, 0);
182 len = pretty_print_word(label, label_len, len, 0);
183 pretty_print_word(mtpt, mtpt_len, len, 0);
184
185 fputs(uuid, stdout);
186 fputc('\n', stdout);
187 }
188
pretty_print_dev(blkid_dev dev)189 static void pretty_print_dev(blkid_dev dev)
190 {
191 blkid_tag_iterate iter;
192 const char *type, *value, *devname;
193 const char *uuid = "", *fs_type = "", *label = "";
194 int len, mount_flags;
195 char mtpt[80];
196 int retval;
197
198 if (dev == NULL) {
199 pretty_print_line("device", "fs_type", "label",
200 "mount point", "UUID");
201 for (len=get_terminal_width()-1; len > 0; len--)
202 fputc('-', stdout);
203 fputc('\n', stdout);
204 return;
205 }
206
207 devname = blkid_dev_devname(dev);
208 if (access(devname, F_OK))
209 return;
210
211 /* Get the uuid, label, type */
212 iter = blkid_tag_iterate_begin(dev);
213 while (blkid_tag_next(iter, &type, &value) == 0) {
214 if (!strcmp(type, "UUID"))
215 uuid = value;
216 if (!strcmp(type, "TYPE"))
217 fs_type = value;
218 if (!strcmp(type, "LABEL"))
219 label = value;
220 }
221 blkid_tag_iterate_end(iter);
222
223 /* Get the mount point */
224 mtpt[0] = 0;
225 retval = check_mount_point(devname, &mount_flags, mtpt, sizeof(mtpt));
226 if (retval == 0) {
227 if (mount_flags & MF_MOUNTED) {
228 if (!mtpt[0])
229 strcpy(mtpt, "(mounted, mtpt unknown)");
230 } else if (mount_flags & MF_BUSY)
231 strcpy(mtpt, "(in use)");
232 else
233 strcpy(mtpt, "(not mounted)");
234 }
235
236 pretty_print_line(devname, fs_type, label, mtpt, uuid);
237 }
238
print_udev_format(const char * name,const char * value)239 static void print_udev_format(const char *name, const char *value)
240 {
241 char enc[265], safe[256];
242 size_t namelen = strlen(name);
243
244 *safe = *enc = '\0';
245
246 if (!strcmp(name, "TYPE") || !strcmp(name, "VERSION")) {
247 blkid_encode_string(value, enc, sizeof(enc));
248 printf("ID_FS_%s=%s\n", name, enc);
249
250 } else if (!strcmp(name, "UUID") ||
251 !strcmp(name, "LABEL") ||
252 !strcmp(name, "UUID_SUB")) {
253
254 blkid_safe_string(value, safe, sizeof(safe));
255 printf("ID_FS_%s=%s\n", name, safe);
256
257 blkid_encode_string(value, enc, sizeof(enc));
258 printf("ID_FS_%s_ENC=%s\n", name, enc);
259
260 } else if (!strcmp(name, "PTUUID")) {
261 printf("ID_PART_TABLE_UUID=%s\n", value);
262
263 } else if (!strcmp(name, "PTTYPE")) {
264 printf("ID_PART_TABLE_TYPE=%s\n", value);
265
266 } else if (!strcmp(name, "PART_ENTRY_NAME") ||
267 !strcmp(name, "PART_ENTRY_TYPE")) {
268
269 blkid_encode_string(value, enc, sizeof(enc));
270 printf("ID_%s=%s\n", name, enc);
271
272 } else if (!strncmp(name, "PART_ENTRY_", 11))
273 printf("ID_%s=%s\n", name, value);
274
275 else if (namelen >= 15 && (
276 !strcmp(name + (namelen - 12), "_SECTOR_SIZE") ||
277 !strcmp(name + (namelen - 8), "_IO_SIZE") ||
278 !strcmp(name, "ALIGNMENT_OFFSET")))
279 printf("ID_IOLIMIT_%s=%s\n", name, value);
280 else
281 printf("ID_FS_%s=%s\n", name, value);
282 }
283
has_item(char * ary[],const char * item)284 static int has_item(char *ary[], const char *item)
285 {
286 char **p;
287
288 for (p = ary; *p != NULL; p++)
289 if (!strcmp(item, *p))
290 return 1;
291 return 0;
292 }
293
print_value(int output,int num,const char * devname,const char * value,const char * name,size_t valsz)294 static void print_value(int output, int num, const char *devname,
295 const char *value, const char *name, size_t valsz)
296 {
297 if (output & OUTPUT_VALUE_ONLY) {
298 fputs(value, stdout);
299 fputc('\n', stdout);
300
301 } else if (output & OUTPUT_UDEV_LIST) {
302 print_udev_format(name, value);
303
304 } else if (output & OUTPUT_EXPORT_LIST) {
305 if (num == 1 && devname)
306 printf("DEVNAME=%s\n", devname);
307 fputs(name, stdout);
308 fputs("=", stdout);
309 safe_print(value, valsz, NULL);
310 fputs("\n", stdout);
311
312 } else {
313 if (num == 1 && devname)
314 printf("%s:", devname);
315 fputs(" ", stdout);
316 fputs(name, stdout);
317 fputs("=\"", stdout);
318 safe_print(value, valsz, "\"");
319 fputs("\"", stdout);
320 }
321 }
322
print_tags(blkid_dev dev,char * show[],int output)323 static void print_tags(blkid_dev dev, char *show[], int output)
324 {
325 blkid_tag_iterate iter;
326 const char *type, *value, *devname;
327 int num = 1;
328 static int first = 1;
329
330 if (!dev)
331 return;
332
333 if (output & OUTPUT_PRETTY_LIST) {
334 pretty_print_dev(dev);
335 return;
336 }
337
338 devname = blkid_dev_devname(dev);
339
340 if (output & OUTPUT_DEVICE_ONLY) {
341 printf("%s\n", devname);
342 return;
343 }
344
345 iter = blkid_tag_iterate_begin(dev);
346 while (blkid_tag_next(iter, &type, &value) == 0) {
347 if (show[0] && !has_item(show, type))
348 continue;
349
350 if (num == 1 && !first &&
351 (output & (OUTPUT_UDEV_LIST | OUTPUT_EXPORT_LIST)))
352 /* add extra line between output from more devices */
353 fputc('\n', stdout);
354
355 print_value(output, num++, devname, value, type, strlen(value));
356 }
357 blkid_tag_iterate_end(iter);
358
359 if (num > 1) {
360 if (!(output & (OUTPUT_VALUE_ONLY | OUTPUT_UDEV_LIST |
361 OUTPUT_EXPORT_LIST)))
362 printf("\n");
363 first = 0;
364 }
365 }
366
367
append_str(char ** res,size_t * sz,const char * a,const char * b)368 static int append_str(char **res, size_t *sz, const char *a, const char *b)
369 {
370 char *str = *res;
371 size_t asz = a ? strlen(a) : 0;
372 size_t bsz = b ? strlen(b) : 0;
373 size_t len = *sz + asz + bsz;
374
375 if (!len)
376 return -1;
377
378 *res = str = xrealloc(str, len + 1);
379 str += *sz;
380
381 if (a) {
382 memcpy(str, a, asz);
383 str += asz;
384 }
385 if (b) {
386 memcpy(str, b, bsz);
387 str += bsz;
388 }
389 *str = '\0';
390 *sz = len;
391 return 0;
392 }
393
394 /*
395 * Compose and print ID_FS_AMBIVALENT for udev
396 */
print_udev_ambivalent(blkid_probe pr)397 static int print_udev_ambivalent(blkid_probe pr)
398 {
399 char *val = NULL;
400 size_t valsz = 0;
401 int count = 0, rc = -1;
402
403 while (!blkid_do_probe(pr)) {
404 const char *usage_txt = NULL, *type = NULL, *version = NULL;
405 char enc[256];
406
407 blkid_probe_lookup_value(pr, "USAGE", &usage_txt, NULL);
408 blkid_probe_lookup_value(pr, "TYPE", &type, NULL);
409 blkid_probe_lookup_value(pr, "VERSION", &version, NULL);
410
411 if (!usage_txt || !type)
412 continue;
413
414 blkid_encode_string(usage_txt, enc, sizeof(enc));
415 if (append_str(&val, &valsz, enc, ":"))
416 goto done;
417
418 blkid_encode_string(type, enc, sizeof(enc));
419 if (append_str(&val, &valsz, enc, version ? ":" : " "))
420 goto done;
421
422 if (version) {
423 blkid_encode_string(version, enc, sizeof(enc));
424 if (append_str(&val, &valsz, enc, " "))
425 goto done;
426 }
427 count++;
428 }
429
430 if (count > 1) {
431 *(val + valsz - 1) = '\0'; /* rem tailing whitespace */
432 printf("ID_FS_AMBIVALENT=%s\n", val);
433 rc = 0;
434 }
435 done:
436 free(val);
437 return rc;
438 }
439
lowprobe_superblocks(blkid_probe pr)440 static int lowprobe_superblocks(blkid_probe pr)
441 {
442 struct stat st;
443 int rc, fd = blkid_probe_get_fd(pr);
444
445 if (fd < 0 || fstat(fd, &st))
446 return -1;
447
448 blkid_probe_enable_partitions(pr, 1);
449
450 if (!S_ISCHR(st.st_mode) && blkid_probe_get_size(pr) <= 1024 * 1440 &&
451 blkid_probe_is_wholedisk(pr)) {
452 /*
453 * check if the small disk is partitioned, if yes then
454 * don't probe for filesystems.
455 */
456 blkid_probe_enable_superblocks(pr, 0);
457
458 rc = blkid_do_fullprobe(pr);
459 if (rc < 0)
460 return rc; /* -1 = error, 1 = nothing, 0 = succes */
461
462 if (blkid_probe_lookup_value(pr, "PTTYPE", NULL, NULL) == 0)
463 return 0; /* partition table detected */
464 }
465
466 blkid_probe_set_partitions_flags(pr, BLKID_PARTS_ENTRY_DETAILS);
467 blkid_probe_enable_superblocks(pr, 1);
468
469 return blkid_do_safeprobe(pr);
470 }
471
lowprobe_topology(blkid_probe pr)472 static int lowprobe_topology(blkid_probe pr)
473 {
474 /* enable topology probing only */
475 blkid_probe_enable_topology(pr, 1);
476
477 blkid_probe_enable_superblocks(pr, 0);
478 blkid_probe_enable_partitions(pr, 0);
479
480 return blkid_do_fullprobe(pr);
481 }
482
lowprobe_device(blkid_probe pr,const char * devname,int chain,char * show[],int output,blkid_loff_t offset,blkid_loff_t size)483 static int lowprobe_device(blkid_probe pr, const char *devname,
484 int chain, char *show[], int output,
485 blkid_loff_t offset, blkid_loff_t size)
486 {
487 const char *data;
488 const char *name;
489 int nvals = 0, n, num = 1;
490 size_t len;
491 int fd;
492 int rc = 0;
493 static int first = 1;
494
495 fd = open(devname, O_RDONLY|O_CLOEXEC);
496 if (fd < 0) {
497 fprintf(stderr, "error: %s: %m\n", devname);
498 return BLKID_EXIT_NOTFOUND;
499 }
500 if (blkid_probe_set_device(pr, fd, offset, size))
501 goto done;
502
503 if (chain & LOWPROBE_TOPOLOGY)
504 rc = lowprobe_topology(pr);
505 if (rc >= 0 && (chain & LOWPROBE_SUPERBLOCKS))
506 rc = lowprobe_superblocks(pr);
507 if (rc < 0)
508 goto done;
509
510 if (!rc)
511 nvals = blkid_probe_numof_values(pr);
512
513 if (nvals &&
514 !(chain & LOWPROBE_TOPOLOGY) &&
515 !(output & OUTPUT_UDEV_LIST) &&
516 !blkid_probe_has_value(pr, "TYPE") &&
517 !blkid_probe_has_value(pr, "PTTYPE"))
518 /*
519 * Ignore probing result if there is not any filesystem or
520 * partition table on the device and udev output is not
521 * requested.
522 *
523 * The udev db stores information about partitions, so
524 * PART_ENTRY_* values are alway important.
525 */
526 nvals = 0;
527
528 if (nvals && !first && output & (OUTPUT_UDEV_LIST | OUTPUT_EXPORT_LIST))
529 /* add extra line between output from devices */
530 fputc('\n', stdout);
531
532 if (nvals && (output & OUTPUT_DEVICE_ONLY)) {
533 printf("%s\n", devname);
534 goto done;
535 }
536
537 for (n = 0; n < nvals; n++) {
538 if (blkid_probe_get_value(pr, n, &name, &data, &len))
539 continue;
540 if (show[0] && !has_item(show, name))
541 continue;
542 len = strnlen((char *) data, len);
543 print_value(output, num++, devname, (char *) data, name, len);
544 }
545
546 if (first)
547 first = 0;
548 if (nvals >= 1 && !(output & (OUTPUT_VALUE_ONLY |
549 OUTPUT_UDEV_LIST | OUTPUT_EXPORT_LIST)))
550 printf("\n");
551 done:
552 if (rc == -2) {
553 if (output & OUTPUT_UDEV_LIST)
554 print_udev_ambivalent(pr);
555 else
556 fprintf(stderr,
557 "%s: ambivalent result (probably more "
558 "filesystems on the device, use wipefs(8) "
559 "to see more details)\n",
560 devname);
561 }
562 close(fd);
563
564 if (rc == -2)
565 return BLKID_EXIT_AMBIVAL; /* ambivalent probing result */
566 if (!nvals)
567 return BLKID_EXIT_NOTFOUND; /* nothing detected */
568
569 return 0; /* success */
570 }
571
572 /* converts comma separated list to BLKID_USAGE_* mask */
list_to_usage(const char * list,int * flag)573 static int list_to_usage(const char *list, int *flag)
574 {
575 int mask = 0;
576 const char *word = NULL, *p = list;
577
578 if (p && strncmp(p, "no", 2) == 0) {
579 *flag = BLKID_FLTR_NOTIN;
580 p += 2;
581 }
582 if (!p || !*p)
583 goto err;
584 while(p) {
585 word = p;
586 p = strchr(p, ',');
587 if (p)
588 p++;
589 if (!strncmp(word, "filesystem", 10))
590 mask |= BLKID_USAGE_FILESYSTEM;
591 else if (!strncmp(word, "raid", 4))
592 mask |= BLKID_USAGE_RAID;
593 else if (!strncmp(word, "crypto", 6))
594 mask |= BLKID_USAGE_CRYPTO;
595 else if (!strncmp(word, "other", 5))
596 mask |= BLKID_USAGE_OTHER;
597 else
598 goto err;
599 }
600 return mask;
601 err:
602 *flag = 0;
603 fprintf(stderr, "unknown keyword in -u <list> argument: '%s'\n",
604 word ? word : list);
605 exit(BLKID_EXIT_OTHER);
606 }
607
608 /* converts comma separated list to types[] */
list_to_types(const char * list,int * flag)609 static char **list_to_types(const char *list, int *flag)
610 {
611 int i;
612 const char *p = list;
613 char **res = NULL;
614
615 if (p && strncmp(p, "no", 2) == 0) {
616 *flag = BLKID_FLTR_NOTIN;
617 p += 2;
618 }
619 if (!p || !*p) {
620 fprintf(stderr, "error: -u <list> argument is empty\n");
621 goto err;
622 }
623 for (i = 1; p && (p = strchr(p, ',')); i++, p++);
624
625 res = xcalloc(i + 1, sizeof(char *));
626 p = *flag & BLKID_FLTR_NOTIN ? list + 2 : list;
627 i = 0;
628
629 while(p) {
630 const char *word = p;
631 p = strchr(p, ',');
632 res[i++] = p ? xstrndup(word, p - word) : xstrdup(word);
633 if (p)
634 p++;
635 }
636 res[i] = NULL;
637 return res;
638 err:
639 *flag = 0;
640 free(res);
641 exit(BLKID_EXIT_OTHER);
642 }
643
free_types_list(char * list[])644 static void free_types_list(char *list[])
645 {
646 char **n;
647
648 if (!list)
649 return;
650 for (n = list; *n; n++)
651 free(*n);
652 free(list);
653 }
654
main(int argc,char ** argv)655 int main(int argc, char **argv)
656 {
657 blkid_cache cache = NULL;
658 char **devices = NULL;
659 char *show[128] = { NULL, };
660 char *search_type = NULL, *search_value = NULL;
661 char *read = NULL;
662 int fltr_usage = 0;
663 char **fltr_type = NULL;
664 int fltr_flag = BLKID_FLTR_ONLYIN;
665 unsigned int numdev = 0, numtag = 0;
666 int version = 0;
667 int err = BLKID_EXIT_OTHER;
668 unsigned int i;
669 int output_format = 0;
670 int lookup = 0, gc = 0, lowprobe = 0, eval = 0;
671 int c;
672 uintmax_t offset = 0, size = 0;
673
674 static const ul_excl_t excl[] = { /* rows and cols in in ASCII order */
675 { 'n','u' },
676 { 0 }
677 };
678 int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
679
680 show[0] = NULL;
681 atexit(close_stdout);
682
683 while ((c = getopt (argc, argv,
684 "c:df:ghilL:n:ko:O:ps:S:t:u:U:w:Vv")) != EOF) {
685
686 err_exclusive_options(c, NULL, excl, excl_st);
687
688 switch (c) {
689 case 'c':
690 if (optarg && !*optarg)
691 read = NULL;
692 else
693 read = optarg;
694 break;
695 case 'd':
696 raw_chars = 1;
697 break;
698 case 'L':
699 eval++;
700 search_value = xstrdup(optarg);
701 search_type = xstrdup("LABEL");
702 break;
703 case 'n':
704 fltr_type = list_to_types(optarg, &fltr_flag);
705 break;
706 case 'u':
707 fltr_usage = list_to_usage(optarg, &fltr_flag);
708 break;
709 case 'U':
710 eval++;
711 search_value = xstrdup(optarg);
712 search_type = xstrdup("UUID");
713 break;
714 case 'i':
715 lowprobe |= LOWPROBE_TOPOLOGY;
716 break;
717 case 'l':
718 lookup++;
719 break;
720 case 'g':
721 gc = 1;
722 break;
723 case 'k':
724 {
725 size_t idx = 0;
726 const char *name = NULL;
727
728 while (blkid_superblocks_get_name(idx++, &name, NULL) == 0)
729 printf("%s\n", name);
730 exit(EXIT_SUCCESS);
731 }
732 case 'o':
733 if (!strcmp(optarg, "value"))
734 output_format = OUTPUT_VALUE_ONLY;
735 else if (!strcmp(optarg, "device"))
736 output_format = OUTPUT_DEVICE_ONLY;
737 else if (!strcmp(optarg, "list"))
738 output_format = OUTPUT_PRETTY_LIST; /* deprecated */
739 else if (!strcmp(optarg, "udev"))
740 output_format = OUTPUT_UDEV_LIST;
741 else if (!strcmp(optarg, "export"))
742 output_format = OUTPUT_EXPORT_LIST;
743 else if (!strcmp(optarg, "full"))
744 output_format = 0;
745 else {
746 fprintf(stderr, "Invalid output format %s. "
747 "Choose from value,\n\t"
748 "device, list, udev or full\n", optarg);
749 exit(BLKID_EXIT_OTHER);
750 }
751 break;
752 case 'O':
753 offset = strtosize_or_err(optarg, "invalid offset argument");
754 break;
755 case 'p':
756 lowprobe |= LOWPROBE_SUPERBLOCKS;
757 break;
758 case 's':
759 if (numtag + 1 >= sizeof(show) / sizeof(*show)) {
760 fprintf(stderr, "Too many tags specified\n");
761 usage(err);
762 }
763 show[numtag++] = optarg;
764 show[numtag] = NULL;
765 break;
766 case 'S':
767 size = strtosize_or_err(optarg, "invalid size argument");
768 break;
769 case 't':
770 if (search_type) {
771 fprintf(stderr, "Can only search for "
772 "one NAME=value pair\n");
773 usage(err);
774 }
775 if (blkid_parse_tag_string(optarg,
776 &search_type,
777 &search_value)) {
778 fprintf(stderr, "-t needs NAME=value pair\n");
779 usage(err);
780 }
781 break;
782 case 'V':
783 case 'v':
784 version = 1;
785 break;
786 case 'w':
787 /* ignore - backward compatibility */
788 break;
789 case 'h':
790 err = 0;
791 /* fallthrough */
792 default:
793 usage(err);
794 }
795 }
796
797
798 /* The rest of the args are device names */
799 if (optind < argc) {
800 devices = xcalloc(argc - optind, sizeof(char *));
801 while (optind < argc)
802 devices[numdev++] = argv[optind++];
803 }
804
805 if (version) {
806 print_version(stdout);
807 goto exit;
808 }
809
810 /* convert LABEL/UUID lookup to evaluate request */
811 if (lookup && output_format == OUTPUT_DEVICE_ONLY && search_type &&
812 (!strcmp(search_type, "LABEL") || !strcmp(search_type, "UUID"))) {
813 eval++;
814 lookup = 0;
815 }
816
817 if (!lowprobe && !eval && blkid_get_cache(&cache, read) < 0)
818 goto exit;
819
820 if (gc) {
821 blkid_gc_cache(cache);
822 err = 0;
823 goto exit;
824 }
825 err = BLKID_EXIT_NOTFOUND;
826
827 if (eval == 0 && (output_format & OUTPUT_PRETTY_LIST)) {
828 if (lowprobe) {
829 fprintf(stderr, "The low-level probing mode does not "
830 "support 'list' output format\n");
831 exit(BLKID_EXIT_OTHER);
832 }
833 pretty_print_dev(NULL);
834 }
835
836 if (lowprobe) {
837 /*
838 * Low-level API
839 */
840 blkid_probe pr;
841
842 if (!numdev) {
843 fprintf(stderr, "The low-level probing mode "
844 "requires a device\n");
845 exit(BLKID_EXIT_OTHER);
846 }
847
848 /* automatically enable 'export' format for I/O Limits */
849 if (!output_format && (lowprobe & LOWPROBE_TOPOLOGY))
850 output_format = OUTPUT_EXPORT_LIST;
851
852 pr = blkid_new_probe();
853 if (!pr)
854 goto exit;
855
856 if (lowprobe & LOWPROBE_SUPERBLOCKS) {
857 blkid_probe_set_superblocks_flags(pr,
858 BLKID_SUBLKS_LABEL | BLKID_SUBLKS_UUID |
859 BLKID_SUBLKS_TYPE | BLKID_SUBLKS_SECTYPE |
860 BLKID_SUBLKS_USAGE | BLKID_SUBLKS_VERSION);
861
862 if (fltr_usage && blkid_probe_filter_superblocks_usage(
863 pr, fltr_flag, fltr_usage))
864 goto exit;
865
866 else if (fltr_type && blkid_probe_filter_superblocks_type(
867 pr, fltr_flag, fltr_type))
868 goto exit;
869 }
870
871 for (i = 0; i < numdev; i++) {
872 err = lowprobe_device(pr, devices[i], lowprobe, show,
873 output_format,
874 (blkid_loff_t) offset,
875 (blkid_loff_t) size);
876 if (err)
877 break;
878 }
879 blkid_free_probe(pr);
880 } else if (eval) {
881 /*
882 * Evaluate API
883 */
884 char *res = blkid_evaluate_tag(search_type, search_value, NULL);
885 if (res) {
886 err = 0;
887 printf("%s\n", res);
888 }
889 } else if (lookup) {
890 /*
891 * Classic (cache based) API
892 */
893 blkid_dev dev;
894
895 if (!search_type) {
896 fprintf(stderr, "The lookup option requires a "
897 "search type specified using -t\n");
898 exit(BLKID_EXIT_OTHER);
899 }
900 /* Load any additional devices not in the cache */
901 for (i = 0; i < numdev; i++)
902 blkid_get_dev(cache, devices[i], BLKID_DEV_NORMAL);
903
904 if ((dev = blkid_find_dev_with_tag(cache, search_type,
905 search_value))) {
906 print_tags(dev, show, output_format);
907 err = 0;
908 }
909 /* If we didn't specify a single device, show all available devices */
910 } else if (!numdev) {
911 blkid_dev_iterate iter;
912 blkid_dev dev;
913
914 blkid_probe_all(cache);
915
916 iter = blkid_dev_iterate_begin(cache);
917 blkid_dev_set_search(iter, search_type, search_value);
918 while (blkid_dev_next(iter, &dev) == 0) {
919 dev = blkid_verify(cache, dev);
920 if (!dev)
921 continue;
922 print_tags(dev, show, output_format);
923 err = 0;
924 }
925 blkid_dev_iterate_end(iter);
926 /* Add all specified devices to cache (optionally display tags) */
927 } else for (i = 0; i < numdev; i++) {
928 blkid_dev dev = blkid_get_dev(cache, devices[i],
929 BLKID_DEV_NORMAL);
930
931 if (dev) {
932 if (search_type &&
933 !blkid_dev_has_tag(dev, search_type,
934 search_value))
935 continue;
936 print_tags(dev, show, output_format);
937 err = 0;
938 }
939 }
940
941 exit:
942 free(search_type);
943 free(search_value);
944 free_types_list(fltr_type);
945 if (!lowprobe && !eval)
946 blkid_put_cache(cache);
947 free(devices);
948 return err;
949 }
950