]>
Commit | Line | Data |
---|---|---|
22853e4a | 1 | /* |
c4ecaf21 | 2 | * partx: tell the kernel about your disk's partitions |
22853e4a KZ |
3 | * [This is not an fdisk - adding and removing partitions |
4 | * is not a change of the disk, but just telling the kernel | |
5 | * about presence and numbering of on-disk partitions.] | |
6 | * | |
22853e4a | 7 | * aeb, 2000-03-21 -- sah is 42 now |
c4ecaf21 DB |
8 | * |
9 | * Copyright (C) 2010 Davidlohr Bueso <dave@gnu.org> | |
a9485396 | 10 | * Rewritten to use libblkid for util-linux |
c4ecaf21 | 11 | * based on ideas from Karel Zak <kzak@redhat.com> |
22853e4a KZ |
12 | */ |
13 | ||
14 | #include <stdio.h> | |
22853e4a KZ |
15 | #include <errno.h> |
16 | #include <stdlib.h> | |
c4ecaf21 | 17 | #include <ctype.h> |
22853e4a | 18 | #include <getopt.h> |
1d4ad1de | 19 | #include <unistd.h> |
c4ecaf21 | 20 | #include <assert.h> |
c4ecaf21 DB |
21 | #include <dirent.h> |
22 | ||
23 | #include <blkid.h> | |
0d518f34 | 24 | |
1aff9b62 | 25 | #include "c.h" |
c4ecaf21 DB |
26 | #include "pathnames.h" |
27 | #include "nls.h" | |
28 | #include "tt.h" | |
0d518f34 | 29 | #include "blkdev.h" |
c4ecaf21 DB |
30 | #include "strutils.h" |
31 | #include "xalloc.h" | |
22853e4a | 32 | #include "partx.h" |
a88268b8 | 33 | #include "sysfs.h" |
0e938113 | 34 | #include "loopdev.h" |
741a5b10 | 35 | #include "at.h" |
22853e4a | 36 | |
c4ecaf21 DB |
37 | /* this is the default upper limit, could be modified by --nr */ |
38 | #define SLICES_MAX 256 | |
39 | ||
40 | /* all the columns (-o option) */ | |
41 | enum { | |
42 | COL_PARTNO, | |
43 | COL_START, | |
44 | COL_END, | |
45 | COL_SECTORS, | |
46 | COL_SIZE, | |
47 | COL_NAME, | |
48 | COL_UUID, | |
49 | COL_TYPE, | |
5de966b3 KZ |
50 | COL_FLAGS, |
51 | COL_SCHEME, | |
c4ecaf21 | 52 | }; |
22853e4a | 53 | |
c4ecaf21 DB |
54 | enum { |
55 | ACT_LIST = 1, | |
56 | ACT_SHOW, | |
57 | ACT_ADD, | |
58 | ACT_DELETE | |
59 | }; | |
60 | ||
61 | enum { | |
62 | FL_BYTES = (1 << 1) | |
63 | }; | |
64 | ||
65 | /* column names */ | |
66 | struct colinfo { | |
67 | const char *name; /* header */ | |
68 | double whint; /* width hint (N < 1 is in percent of termwidth) */ | |
69 | int flags; /* TT_FL_* */ | |
70 | const char *help; | |
71 | }; | |
22853e4a | 72 | |
c4ecaf21 | 73 | /* columns descriptions */ |
10ebfeea | 74 | struct colinfo infos[] = { |
5de966b3 | 75 | [COL_PARTNO] = { "NR", 0.25, TT_FL_RIGHT, N_("partition number") }, |
c4ecaf21 DB |
76 | [COL_START] = { "START", 0.30, TT_FL_RIGHT, N_("start of the partition in sectors") }, |
77 | [COL_END] = { "END", 0.30, TT_FL_RIGHT, N_("end of the partition in sectors") }, | |
78 | [COL_SECTORS] = { "SECTORS", 0.30, TT_FL_RIGHT, N_("number of sectors") }, | |
79 | [COL_SIZE] = { "SIZE", 0.30, TT_FL_RIGHT, N_("human readable size") }, | |
80 | [COL_NAME] = { "NAME", 0.30, TT_FL_TRUNC, N_("partition name") }, | |
81 | [COL_UUID] = { "UUID", 36, 0, N_("partition UUID")}, | |
5de966b3 KZ |
82 | [COL_SCHEME] = { "SCHEME", 0.1, TT_FL_TRUNC, N_("partition table type (dos, gpt, ...)")}, |
83 | [COL_FLAGS] = { "FLAGS", 0.1, TT_FL_TRUNC, N_("partition flags")}, | |
84 | [COL_TYPE] = { "TYPE", 1, TT_FL_RIGHT, N_("partition type hex or uuid")}, | |
c4ecaf21 | 85 | }; |
10ebfeea DB |
86 | |
87 | #define NCOLS ARRAY_SIZE(infos) | |
88 | ||
c4ecaf21 | 89 | /* array with IDs of enabled columns */ |
10ebfeea | 90 | static int columns[NCOLS], ncolumns; |
c4ecaf21 DB |
91 | |
92 | static int verbose; | |
93 | static int partx_flags; | |
0e938113 DB |
94 | static struct loopdev_cxt lc; |
95 | static int loopdev; | |
22853e4a | 96 | |
0e938113 DB |
97 | /* |
98 | * Check if the kernel supports partitioned loop devices. | |
99 | * In a near future (around linux 3.2, hopefully) this will come | |
100 | * always out of the box, until then we need to check. | |
101 | */ | |
102 | static int loopmod_supports_parts(void) | |
103 | { | |
104 | int rc, ret = 0; | |
105 | FILE *f = fopen("/sys/module/loop/parameters/max_part", "r"); | |
106 | ||
107 | if (!f) | |
108 | return 0; | |
109 | rc = fscanf(f, "%d", &ret); | |
110 | fclose(f); | |
111 | return rc = 1 ? ret : 0; | |
112 | } | |
113 | ||
114 | static void assoc_loopdev(const char *fname) | |
115 | { | |
116 | int rc; | |
117 | ||
118 | loopcxt_init(&lc, 0); | |
119 | ||
120 | rc = loopcxt_find_unused(&lc); | |
121 | if (rc) | |
122 | err(EXIT_FAILURE, _("%s: failed to find unused loop device"), | |
123 | fname); | |
124 | ||
125 | if (verbose) | |
126 | printf(_("Trying to use '%s' for the loop device\n"), | |
127 | loopcxt_get_device(&lc)); | |
128 | ||
129 | if (loopcxt_set_backing_file(&lc, fname)) | |
130 | err(EXIT_FAILURE, _("%s: failed to set backing file"), fname); | |
131 | ||
132 | rc = loopcxt_setup_device(&lc); | |
133 | ||
134 | if (rc == -EBUSY) | |
135 | err(EXIT_FAILURE, _("%s: failed to setup loop device"), fname); | |
136 | ||
137 | loopdev = 1; | |
138 | } | |
22853e4a | 139 | |
c4ecaf21 | 140 | static inline int get_column_id(int num) |
1d4ad1de | 141 | { |
10ebfeea | 142 | assert(ARRAY_SIZE(columns) == NCOLS); |
c4ecaf21 | 143 | assert(num < ncolumns); |
10ebfeea | 144 | assert(columns[num] < (int) NCOLS); |
c4ecaf21 | 145 | return columns[num]; |
22853e4a KZ |
146 | } |
147 | ||
c4ecaf21 | 148 | static inline struct colinfo *get_column_info(int num) |
1d4ad1de | 149 | { |
c4ecaf21 | 150 | return &infos[ get_column_id(num) ]; |
22853e4a KZ |
151 | } |
152 | ||
c4ecaf21 DB |
153 | static int column_name_to_id(const char *name, size_t namesz) |
154 | { | |
10ebfeea | 155 | size_t i; |
22853e4a | 156 | |
c4ecaf21 | 157 | assert(name); |
22853e4a | 158 | |
10ebfeea | 159 | for (i = 0; i < NCOLS; i++) { |
c4ecaf21 | 160 | const char *cn = infos[i].name; |
22853e4a | 161 | |
c4ecaf21 DB |
162 | if (!strncasecmp(name, cn, namesz) && !*(cn + namesz)) |
163 | return i; | |
22853e4a | 164 | } |
c4ecaf21 DB |
165 | warnx(_("unknown column: %s"), name); |
166 | return -1; | |
167 | } | |
22853e4a | 168 | |
c4ecaf21 DB |
169 | /* |
170 | * Given a partition return the corresponding partition number. | |
171 | * | |
172 | * Note that this function tries to use sysfs, otherwise it assumes that the | |
173 | * last characters are always numeric (sda1, sdc20, etc). | |
c4ecaf21 DB |
174 | */ |
175 | static int get_partno_from_device(char *partition, dev_t devno) | |
176 | { | |
177 | int partno = 0; | |
178 | size_t sz; | |
179 | char *p, *end = NULL; | |
180 | ||
181 | assert(partition); | |
182 | ||
183 | if (devno) { | |
a88268b8 DB |
184 | struct sysfs_cxt cxt; |
185 | ||
186 | sysfs_init(&cxt, devno, NULL); | |
4190aaf6 DB |
187 | if (sysfs_read_int(&cxt, "partition", &partno) >= 0) { |
188 | sysfs_deinit(&cxt); | |
c4ecaf21 | 189 | return partno; |
4190aaf6 | 190 | } |
c4ecaf21 | 191 | } |
22853e4a | 192 | |
c4ecaf21 DB |
193 | sz = strlen(partition); |
194 | p = partition + sz - 1; | |
22853e4a | 195 | |
c4ecaf21 DB |
196 | if (!isdigit((unsigned int) *p)) |
197 | goto err; | |
22853e4a | 198 | |
c4ecaf21 DB |
199 | while (isdigit((unsigned int) *(p - 1))) p--; |
200 | ||
201 | errno = 0; | |
202 | partno = strtol(p, &end, 10); | |
203 | if (errno || !end || *end || p == end) | |
204 | goto err; | |
205 | ||
206 | return partno; | |
207 | err: | |
208 | errx(EXIT_FAILURE, _("%s: failed to get partition number"), partition); | |
209 | } | |
210 | ||
211 | static int get_max_partno(const char *disk, dev_t devno) | |
212 | { | |
741a5b10 | 213 | char path[PATH_MAX], *parent, *dirname = NULL; |
c4ecaf21 DB |
214 | struct stat st; |
215 | DIR *dir; | |
216 | struct dirent *d; | |
217 | int partno = 0; | |
218 | ||
219 | if (!devno && !stat(disk, &st)) | |
220 | devno = st.st_rdev; | |
221 | if (!devno) | |
222 | goto dflt; | |
223 | parent = strrchr(disk, '/'); | |
224 | if (!parent) | |
225 | goto dflt; | |
226 | parent++; | |
227 | ||
228 | snprintf(path, sizeof(path), _PATH_SYS_DEVBLOCK "/%d:%d/", | |
229 | major(devno), minor(devno)); | |
230 | ||
231 | dir = opendir(path); | |
232 | if (!dir) | |
233 | goto dflt; | |
234 | ||
741a5b10 KZ |
235 | dirname = xstrdup(path); |
236 | ||
237 | while ((d = readdir(dir))) { | |
c4ecaf21 DB |
238 | int fd; |
239 | ||
240 | if (!strcmp(d->d_name, ".") || | |
241 | !strcmp(d->d_name, "..")) | |
242 | continue; | |
243 | #ifdef _DIRENT_HAVE_D_TYPE | |
244 | if (d->d_type != DT_DIR) | |
245 | continue; | |
246 | #endif | |
247 | if (strncmp(parent, d->d_name, strlen(parent))) | |
248 | continue; | |
249 | snprintf(path, sizeof(path), "%s/partition", d->d_name); | |
250 | ||
741a5b10 | 251 | fd = open_at(dirfd(dir), dirname, path, O_RDONLY); |
c4ecaf21 DB |
252 | if (fd) { |
253 | int x = 0; | |
254 | FILE *f = fdopen(fd, "r"); | |
255 | if (f) { | |
256 | if (fscanf(f, "%d", &x) == 1 && x > partno) | |
257 | partno = x; | |
258 | fclose(f); | |
22853e4a | 259 | } |
22853e4a | 260 | } |
22853e4a KZ |
261 | } |
262 | ||
741a5b10 | 263 | free(dirname); |
c4ecaf21 DB |
264 | closedir(dir); |
265 | return partno; | |
266 | dflt: | |
267 | return SLICES_MAX; | |
268 | } | |
269 | ||
270 | static void del_parts_warnx(const char *device, int first, int last) | |
271 | { | |
272 | if (first == last) | |
273 | warnx(_("%s: error deleting partition %d"), device, first); | |
274 | else | |
275 | warnx(_("%s: error deleting partitions %d-%d"), | |
276 | device, first, last); | |
277 | } | |
278 | ||
279 | static int del_parts(int fd, const char *device, dev_t devno, | |
280 | int lower, int upper) | |
281 | { | |
282 | int rc = 0, i, errfirst = 0, errlast = 0; | |
283 | ||
284 | assert(fd >= 0); | |
285 | assert(device); | |
286 | ||
287 | if (!lower) | |
288 | lower = 1; | |
289 | if (!upper || lower < 0 || upper < 0) { | |
290 | int n = get_max_partno(device, devno); | |
291 | if (!upper) | |
292 | upper = n; | |
293 | else if (upper < 0) | |
294 | upper = n + upper + 1; | |
295 | if (lower < 0) | |
296 | lower = n + lower + 1; | |
297 | } | |
298 | if (lower > upper) { | |
144df9a2 | 299 | warnx(_("specified range <%d:%d> " |
c4ecaf21 DB |
300 | "does not make sense"), lower, upper); |
301 | return -1; | |
302 | } | |
303 | ||
304 | for (i = lower; i <= upper; i++) { | |
ab025087 PS |
305 | rc = partx_del_partition(fd, i); |
306 | if (rc == 0) { | |
c4ecaf21 DB |
307 | if (verbose) |
308 | printf(_("%s: partition #%d removed\n"), device, i); | |
309 | continue; | |
ab025087 PS |
310 | } else if (errno == ENXIO) { |
311 | if (verbose) | |
312 | printf(_("%s: partition #%d already doesn't exist\n"), device, i); | |
313 | continue; | |
c4ecaf21 DB |
314 | } |
315 | rc = -1; | |
316 | if (verbose) | |
144df9a2 | 317 | warn(_("%s: deleting partition #%d failed"), device, i); |
c4ecaf21 DB |
318 | if (!errfirst) |
319 | errlast = errfirst = i; | |
320 | else if (errlast + 1 == i) | |
321 | errlast++; | |
322 | else { | |
323 | del_parts_warnx(device, errfirst, errlast); | |
324 | errlast = errfirst = i; | |
22853e4a | 325 | } |
22853e4a KZ |
326 | } |
327 | ||
c4ecaf21 DB |
328 | if (errfirst) |
329 | del_parts_warnx(device, errfirst, errlast); | |
330 | return rc; | |
331 | } | |
332 | ||
0e938113 | 333 | |
c4ecaf21 DB |
334 | static void add_parts_warnx(const char *device, int first, int last) |
335 | { | |
336 | if (first == last) | |
337 | warnx(_("%s: error adding partition %d"), device, first); | |
338 | else | |
339 | warnx(_("%s: error adding partitions %d-%d"), | |
340 | device, first, last); | |
341 | } | |
342 | ||
343 | static int add_parts(int fd, const char *device, | |
0e938113 | 344 | blkid_partlist ls, int lower, int upper) |
c4ecaf21 DB |
345 | { |
346 | int i, nparts, rc = 0, errfirst = 0, errlast = 0; | |
347 | ||
348 | assert(fd >= 0); | |
349 | assert(device); | |
350 | assert(ls); | |
351 | ||
352 | nparts = blkid_partlist_numof_partitions(ls); | |
353 | ||
354 | for (i = 0; i < nparts; i++) { | |
355 | blkid_partition par = blkid_partlist_get_partition(ls, i); | |
356 | int n = blkid_partition_get_partno(par); | |
357 | uintmax_t start, size; | |
358 | ||
359 | if (lower && n < lower) | |
360 | continue; | |
361 | if (upper && n > upper) | |
362 | continue; | |
363 | ||
364 | start = blkid_partition_get_start(par); | |
365 | size = blkid_partition_get_size(par); | |
366 | ||
367 | if (blkid_partition_is_extended(par)) | |
368 | /* | |
144df9a2 BS |
369 | * Let's follow the Linux kernel and reduce |
370 | * DOS extended partition to 1 or 2 sectors. | |
c4ecaf21 DB |
371 | */ |
372 | size = min(size, (uintmax_t) 2); | |
373 | ||
374 | if (partx_add_partition(fd, n, start, size) == 0) { | |
375 | if (verbose) | |
376 | printf(_("%s: partition #%d added\n"), device, n); | |
377 | continue; | |
378 | } | |
379 | rc = -1; | |
380 | if (verbose) | |
144df9a2 | 381 | warn(_("%s: adding partition #%d failed"), device, n); |
c4ecaf21 DB |
382 | if (!errfirst) |
383 | errlast = errfirst = n; | |
384 | else if (errlast + 1 == n) | |
385 | errlast++; | |
386 | else { | |
387 | add_parts_warnx(device, errfirst, errlast); | |
388 | errlast = errfirst = n; | |
389 | } | |
22853e4a | 390 | } |
c4ecaf21 DB |
391 | |
392 | if (errfirst) | |
393 | add_parts_warnx(device, errfirst, errlast); | |
0e938113 DB |
394 | |
395 | /* the kernel adds *all* loopdev partitions, so we should delete | |
396 | any extra, unwanted ones, when the -n option is passed */ | |
397 | if (loopdev && (lower || upper)) { | |
398 | for (i = 0; i < nparts; i++) { | |
399 | blkid_partition par = blkid_partlist_get_partition(ls, i); | |
400 | int n = blkid_partition_get_partno(par); | |
401 | ||
402 | if (n < lower || n > upper) | |
403 | partx_del_partition(fd, n); | |
404 | } | |
405 | } | |
406 | ||
c4ecaf21 DB |
407 | return rc; |
408 | } | |
409 | ||
410 | static int list_parts(blkid_partlist ls, int lower, int upper) | |
411 | { | |
412 | int i, nparts; | |
413 | ||
414 | assert(ls); | |
415 | ||
416 | nparts = blkid_partlist_numof_partitions(ls); | |
417 | ||
418 | for (i = 0; i < nparts; i++) { | |
419 | blkid_partition par = blkid_partlist_get_partition(ls, i); | |
420 | int n = blkid_partition_get_partno(par); | |
421 | uintmax_t start, size; | |
422 | ||
423 | if (lower && n < lower) | |
424 | continue; | |
425 | if (upper && n > upper) | |
426 | continue; | |
427 | ||
428 | start = blkid_partition_get_start(par); | |
429 | size = blkid_partition_get_size(par); | |
430 | ||
144df9a2 | 431 | printf(_("#%2d: %9ju-%9ju (%9ju sectors, %6ju MB)\n"), |
c4ecaf21 DB |
432 | n, start, start + size -1, |
433 | size, (size << 9) / 1000000); | |
22853e4a | 434 | } |
c4ecaf21 DB |
435 | return 0; |
436 | } | |
437 | ||
438 | static void add_tt_line(struct tt *tt, blkid_partition par) | |
439 | { | |
440 | struct tt_line *line; | |
441 | int i; | |
442 | ||
443 | assert(tt); | |
444 | assert(par); | |
22853e4a | 445 | |
c4ecaf21 DB |
446 | line = tt_add_line(tt, NULL); |
447 | if (!line) { | |
448 | warn(_("failed to add line to output")); | |
449 | return; | |
22853e4a | 450 | } |
22853e4a | 451 | |
c4ecaf21 DB |
452 | for (i = 0; i < ncolumns; i++) { |
453 | char *str = NULL; | |
454 | int rc = 0; | |
455 | ||
456 | switch (get_column_id(i)) { | |
457 | case COL_PARTNO: | |
458 | rc = asprintf(&str, "%d", | |
459 | blkid_partition_get_partno(par)); | |
460 | break; | |
461 | case COL_START: | |
462 | rc = asprintf(&str, "%ju", | |
463 | blkid_partition_get_start(par)); | |
464 | break; | |
465 | case COL_END: | |
466 | rc = asprintf(&str, "%ju", | |
467 | blkid_partition_get_start(par) + | |
468 | blkid_partition_get_size(par) - 1); | |
469 | break; | |
470 | case COL_SECTORS: | |
471 | rc = asprintf(&str, "%ju", | |
472 | blkid_partition_get_size(par)); | |
473 | break; | |
474 | case COL_SIZE: | |
475 | if (partx_flags & FL_BYTES) | |
476 | rc = asprintf(&str, "%ju", (uintmax_t) | |
477 | blkid_partition_get_size(par) << 9); | |
5de966b3 | 478 | else |
5d2a9849 | 479 | str = size_to_human_string(SIZE_SUFFIX_1LETTER, |
c4ecaf21 | 480 | blkid_partition_get_size(par) << 9); |
c4ecaf21 DB |
481 | break; |
482 | case COL_NAME: | |
483 | str = (char *) blkid_partition_get_name(par); | |
5de966b3 KZ |
484 | if (str) |
485 | str = xstrdup(str); | |
c4ecaf21 DB |
486 | break; |
487 | case COL_UUID: | |
488 | str = (char *) blkid_partition_get_uuid(par); | |
5de966b3 KZ |
489 | if (str) |
490 | str = xstrdup(str); | |
c4ecaf21 DB |
491 | break; |
492 | case COL_TYPE: | |
5de966b3 KZ |
493 | str = (char *) blkid_partition_get_type_string(par); |
494 | if (str) | |
495 | str = xstrdup(str); | |
496 | else | |
497 | rc = asprintf(&str, "0x%x", | |
498 | blkid_partition_get_type(par)); | |
c4ecaf21 | 499 | break; |
5de966b3 KZ |
500 | case COL_FLAGS: |
501 | rc = asprintf(&str, "0x%llx", blkid_partition_get_flags(par)); | |
502 | break; | |
503 | case COL_SCHEME: | |
504 | { | |
505 | blkid_parttable tab = blkid_partition_get_table(par); | |
506 | if (tab) { | |
507 | str = (char *) blkid_parttable_get_type(tab); | |
508 | if (str) | |
509 | str = xstrdup(str); | |
510 | } | |
511 | break; | |
512 | } | |
c4ecaf21 DB |
513 | default: |
514 | break; | |
515 | } | |
516 | ||
5de966b3 | 517 | if (rc || str) |
c4ecaf21 | 518 | tt_line_set_data(line, i, str); |
22853e4a | 519 | } |
c4ecaf21 | 520 | } |
22853e4a | 521 | |
c4ecaf21 DB |
522 | static int show_parts(blkid_partlist ls, int tt_flags, int lower, int upper) |
523 | { | |
524 | int i, rc = -1; | |
525 | struct tt *tt; | |
526 | int nparts; | |
22853e4a | 527 | |
c4ecaf21 DB |
528 | assert(ls); |
529 | ||
530 | nparts = blkid_partlist_numof_partitions(ls); | |
531 | if (!nparts) | |
532 | return 0; | |
533 | ||
534 | tt = tt_new_table(tt_flags); | |
535 | if (!tt) { | |
536 | warn(_("failed to initialize output table")); | |
537 | return -1; | |
22853e4a | 538 | } |
22853e4a | 539 | |
c4ecaf21 DB |
540 | for (i = 0; i < ncolumns; i++) { |
541 | struct colinfo *col = get_column_info(i); | |
542 | ||
543 | if (!tt_define_column(tt, col->name, col->whint, col->flags)) { | |
544 | warnx(_("failed to initialize output column")); | |
545 | goto done; | |
22853e4a KZ |
546 | } |
547 | } | |
548 | ||
c4ecaf21 DB |
549 | for (i = 0; i < nparts; i++) { |
550 | blkid_partition par = blkid_partlist_get_partition(ls, i); | |
551 | int n = blkid_partition_get_partno(par); | |
22853e4a | 552 | |
c4ecaf21 DB |
553 | if (lower && n < lower) |
554 | continue; | |
555 | if (upper && n > upper) | |
556 | continue; | |
22853e4a | 557 | |
c4ecaf21 | 558 | add_tt_line(tt, par); |
22853e4a | 559 | } |
c4ecaf21 DB |
560 | |
561 | rc = 0; | |
562 | tt_print_table(tt); | |
563 | done: | |
564 | tt_free_table(tt); | |
565 | return rc; | |
22853e4a KZ |
566 | } |
567 | ||
c4ecaf21 DB |
568 | static blkid_partlist get_partlist(blkid_probe pr, |
569 | const char *device, char *type) | |
570 | { | |
571 | blkid_partlist ls; | |
572 | blkid_parttable tab; | |
573 | ||
574 | assert(pr); | |
575 | assert(device); | |
576 | ||
577 | if (type) { | |
578 | char *name[] = { type, NULL }; | |
579 | ||
580 | if (blkid_probe_filter_partitions_type(pr, | |
581 | BLKID_FLTR_ONLYIN, name)) { | |
582 | warnx(_("failed to initialize blkid " | |
144df9a2 | 583 | "filter for '%s'"), type); |
c4ecaf21 DB |
584 | return NULL; |
585 | } | |
586 | } | |
587 | ||
588 | ls = blkid_probe_get_partitions(pr); | |
589 | if (!ls) { | |
590 | warnx(_("%s: failed to read partition table"), device); | |
591 | return NULL; | |
592 | } | |
593 | ||
594 | tab = blkid_partlist_get_table(ls); | |
595 | if (verbose && tab) | |
144df9a2 BS |
596 | printf(_("%s: partition table type '%s' detected\n"), |
597 | device, blkid_parttable_get_type(tab)); | |
c4ecaf21 DB |
598 | |
599 | if (!blkid_partlist_numof_partitions(ls)) { | |
600 | warnx(_("%s: %s partition table does not contains " | |
601 | "usable partitions"), device, | |
602 | blkid_parttable_get_type(tab)); | |
22853e4a | 603 | return NULL; |
22853e4a | 604 | } |
c4ecaf21 DB |
605 | return ls; |
606 | } | |
607 | ||
abafd686 | 608 | static void __attribute__((__noreturn__)) usage(FILE *out) |
c4ecaf21 | 609 | { |
10ebfeea | 610 | size_t i; |
c4ecaf21 | 611 | |
4ded3823 | 612 | fputs(USAGE_HEADER, out); |
e96fd176 | 613 | fprintf(out, |
b37155e2 | 614 | _(" %s [-a|-d|-s] [--nr <n:m> | <partition>] <disk>\n"), |
c4ecaf21 DB |
615 | program_invocation_short_name); |
616 | ||
8275b732 | 617 | fputs(USAGE_OPTIONS, out); |
e96fd176 | 618 | fputs(_(" -a, --add add specified partitions or all of them\n" |
c4ecaf21 DB |
619 | " -d, --delete delete specified partitions or all of them\n" |
620 | " -l, --list list partitions (DEPRECATED)\n" | |
621 | " -s, --show list partitions\n\n" | |
622 | ||
623 | " -b, --bytes print SIZE in bytes rather than in human readable format\n" | |
624 | " -g, --noheadings don't print headings for --show\n" | |
8275b732 KZ |
625 | " -n, --nr <n:m> specify the range of partitions (e.g. --nr 2:4)\n" |
626 | " -o, --output <type> define which output columns to use\n" | |
8ed48785 KZ |
627 | " -P, --pairs use key=\"value\" output format\n" |
628 | " -r, --raw use raw output format\n" | |
b37155e2 | 629 | " -t, --type <type> specify the partition type (dos, bsd, solaris, etc.)\n" |
8275b732 KZ |
630 | " -v, --verbose verbose mode\n"), out); |
631 | ||
632 | fputs(USAGE_SEPARATOR, out); | |
633 | fputs(USAGE_HELP, out); | |
634 | fputs(USAGE_VERSION, out); | |
c4ecaf21 | 635 | |
e96fd176 | 636 | fputs(_("\nAvailable columns (for --show, --raw or --pairs):\n"), out); |
c4ecaf21 | 637 | |
10ebfeea | 638 | for (i = 0; i < NCOLS; i++) |
d015794e | 639 | fprintf(out, " %10s %s\n", infos[i].name, _(infos[i].help)); |
c4ecaf21 | 640 | |
4ded3823 | 641 | fprintf(out, USAGE_MAN_TAIL("partx(8)")); |
c4ecaf21 DB |
642 | |
643 | exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS); | |
644 | } | |
645 | ||
abafd686 | 646 | static void __attribute__((__noreturn__)) |
c4ecaf21 DB |
647 | errx_mutually_exclusive(const char *opts) |
648 | { | |
144df9a2 | 649 | errx(EXIT_FAILURE, _("the options %s are mutually exclusive"), opts); |
22853e4a KZ |
650 | } |
651 | ||
c4ecaf21 DB |
652 | int main(int argc, char **argv) |
653 | { | |
654 | int fd, c, what = 0, lower = 0, upper = 0, rc = 0; | |
655 | int tt_flags = 0; | |
656 | char *type = NULL; | |
1d6a5daa | 657 | char *device = NULL; /* pointer to argv[], ie: /dev/sda1 */ |
c4ecaf21 DB |
658 | char *wholedisk = NULL; /* allocated, ie: /dev/sda */ |
659 | dev_t disk_devno = 0, part_devno = 0; | |
660 | ||
661 | static const struct option long_opts[] = { | |
662 | { "bytes", no_argument, NULL, 'b' }, | |
663 | { "noheadings", no_argument, NULL, 'g' }, | |
664 | { "raw", no_argument, NULL, 'r' }, | |
665 | { "list", no_argument, NULL, 'l' }, | |
666 | { "show", no_argument, NULL, 's' }, | |
667 | { "add", no_argument, NULL, 'a' }, | |
668 | { "delete", no_argument, NULL, 'd' }, | |
669 | { "type", required_argument, NULL, 't' }, | |
670 | { "nr", required_argument, NULL, 'n' }, | |
671 | { "output", required_argument, NULL, 'o' }, | |
8ed48785 | 672 | { "pairs", no_argument, NULL, 'P' }, |
c4ecaf21 | 673 | { "help", no_argument, NULL, 'h' }, |
8275b732 | 674 | { "verbose", no_argument, NULL, 'v' }, |
c4ecaf21 DB |
675 | { NULL, 0, NULL, 0 } |
676 | }; | |
677 | ||
5c87aa1a BS |
678 | setlocale(LC_ALL, ""); |
679 | bindtextdomain(PACKAGE, LOCALEDIR); | |
680 | textdomain(PACKAGE); | |
681 | ||
8ed48785 KZ |
682 | while ((c = getopt_long(argc, argv, |
683 | "abdglrsvn:t:o:Ph", long_opts, NULL)) != -1) { | |
684 | ||
c4ecaf21 DB |
685 | switch(c) { |
686 | case 'a': | |
8ed48785 KZ |
687 | case 'd': |
688 | case 'l': | |
689 | case 'r': | |
690 | case 'P': | |
691 | case 's': | |
c4ecaf21 | 692 | if (what) |
8ed48785 KZ |
693 | errx_mutually_exclusive("--{add,delete,show,list,raw,pairs}"); |
694 | break; | |
695 | } | |
696 | ||
697 | switch(c) { | |
698 | case 'a': | |
c4ecaf21 DB |
699 | what = ACT_ADD; |
700 | break; | |
701 | case 'b': | |
702 | partx_flags |= FL_BYTES; | |
703 | break; | |
704 | case 'd': | |
c4ecaf21 DB |
705 | what = ACT_DELETE; |
706 | break; | |
707 | case 'g': | |
708 | tt_flags |= TT_FL_NOHEADINGS; | |
709 | break; | |
710 | case 'l': | |
c4ecaf21 DB |
711 | what = ACT_LIST; |
712 | break; | |
713 | case 'n': | |
af7df9ee | 714 | if (parse_range(optarg, &lower, &upper, 0)) |
c4ecaf21 DB |
715 | errx(EXIT_FAILURE, _("failed to parse --nr <M-N> range")); |
716 | break; | |
c4ecaf21 | 717 | case 'o': |
c87638ad | 718 | ncolumns = string_to_idarray(optarg, |
bdc3ed66 KZ |
719 | columns, ARRAY_SIZE(columns), |
720 | column_name_to_id); | |
721 | if (ncolumns < 0) | |
c4ecaf21 DB |
722 | return EXIT_FAILURE; |
723 | break; | |
8ed48785 KZ |
724 | case 'P': |
725 | tt_flags |= TT_FL_EXPORT; | |
726 | what = ACT_SHOW; | |
727 | break; | |
c4ecaf21 DB |
728 | case 'r': |
729 | tt_flags |= TT_FL_RAW; | |
c4ecaf21 DB |
730 | what = ACT_SHOW; |
731 | break; | |
c4ecaf21 | 732 | case 's': |
c4ecaf21 DB |
733 | what = ACT_SHOW; |
734 | break; | |
735 | case 't': | |
736 | type = optarg; | |
737 | break; | |
738 | case 'v': | |
739 | verbose = 1; | |
740 | break; | |
741 | case 'h': | |
742 | usage(stdout); | |
743 | case '?': | |
744 | default: | |
745 | usage(stderr); | |
746 | } | |
747 | } | |
748 | ||
749 | /* -o <list> enables --show mode by default */ | |
750 | if (ncolumns && !what) | |
751 | what = ACT_SHOW; | |
752 | ||
753 | /* backwardly compatible default */ | |
754 | if (!what) | |
755 | what = ACT_LIST; | |
756 | ||
757 | /* --show default, could by modified by -o */ | |
758 | if (what == ACT_SHOW && !ncolumns) { | |
759 | columns[ncolumns++] = COL_PARTNO; | |
760 | columns[ncolumns++] = COL_START; | |
761 | columns[ncolumns++] = COL_END; | |
762 | columns[ncolumns++] = COL_SECTORS; | |
763 | columns[ncolumns++] = COL_SIZE; | |
764 | columns[ncolumns++] = COL_NAME; | |
765 | columns[ncolumns++] = COL_UUID; | |
766 | } | |
767 | ||
768 | /* | |
769 | * Note that 'partx /dev/sda1' == 'partx /dev/sda1 /dev/sda' | |
770 | * so assume that the device and/or disk are always the last | |
771 | * arguments to be passed to partx. | |
772 | */ | |
773 | if (optind == argc - 2) { | |
774 | /* passed 2 arguments: | |
775 | * /dev/sda1 /dev/sda : partition + whole-disk | |
776 | * -- /dev/sda1 : partition that should be used as a whole-disk | |
777 | */ | |
778 | device = argv[optind]; | |
779 | ||
780 | if (strcmp(device, "-") == 0) { | |
781 | device = NULL; | |
782 | wholedisk = xstrdup(argv[optind + 1]); | |
783 | } else { | |
784 | device = argv[optind]; | |
785 | wholedisk = xstrdup(argv[optind + 1]); | |
786 | } | |
787 | } else if (optind == argc - 1) { | |
788 | /* passed only one arg (ie: /dev/sda3 or /dev/sda) */ | |
789 | struct stat sb; | |
790 | ||
791 | device = argv[optind]; | |
792 | ||
793 | if (stat(device, &sb)) | |
794 | err(EXIT_FAILURE, _("%s: stat failed"), device); | |
795 | ||
796 | part_devno = sb.st_rdev; | |
797 | ||
798 | if (blkid_devno_to_wholedisk(part_devno, | |
799 | NULL, 0, &disk_devno) == 0 && | |
800 | part_devno != disk_devno) | |
801 | wholedisk = blkid_devno_to_devname(disk_devno); | |
802 | ||
803 | if (!wholedisk) { | |
804 | wholedisk = xstrdup(device); | |
805 | disk_devno = part_devno; | |
806 | device = NULL; | |
807 | part_devno = 0; | |
22853e4a | 808 | } |
22853e4a | 809 | } else |
c4ecaf21 DB |
810 | usage(stderr); |
811 | ||
812 | if (device && (upper || lower)) | |
e22d8b95 | 813 | errx(EXIT_FAILURE, _("--nr and <partition> are mutually exclusive")); |
c4ecaf21 DB |
814 | |
815 | assert(wholedisk); | |
816 | ||
817 | if (device) { | |
818 | /* use partno from given partition instead of --nr range, e.g: | |
819 | * partx -d /dev/sda3 | |
820 | * is the same like: | |
821 | * partx -d --nr 3 /dev/sda | |
822 | */ | |
823 | struct stat sb; | |
824 | ||
825 | if (!part_devno && !stat(device, &sb)) | |
826 | part_devno = sb.st_rdev; | |
827 | ||
828 | lower = upper = get_partno_from_device(device, part_devno); | |
829 | } | |
830 | ||
831 | if (verbose) | |
144df9a2 | 832 | printf(_("partition: %s, disk: %s, lower: %d, upper: %d\n"), |
2e2b6bb1 | 833 | device ? device : "none", wholedisk, lower, upper); |
c4ecaf21 DB |
834 | |
835 | if (what == ACT_ADD || what == ACT_DELETE) { | |
836 | struct stat x; | |
837 | ||
0e938113 DB |
838 | if (stat(wholedisk, &x)) |
839 | errx(EXIT_FAILURE, "%s", wholedisk); | |
840 | ||
841 | if (S_ISREG(x.st_mode)) { | |
842 | /* not a blkdev, try to associate it to a loop device */ | |
843 | if (what == ACT_DELETE) | |
844 | errx(EXIT_FAILURE, _("%s: cannot delete partitions"), | |
845 | wholedisk); | |
846 | if (!loopmod_supports_parts()) | |
847 | errx(EXIT_FAILURE, _("%s: partitioned loop devices unsupported"), | |
848 | wholedisk); | |
849 | assoc_loopdev(wholedisk); | |
850 | wholedisk = xstrdup(lc.device); | |
851 | } else if (!S_ISBLK(x.st_mode)) | |
c4ecaf21 DB |
852 | errx(EXIT_FAILURE, _("%s: not a block device"), wholedisk); |
853 | } | |
854 | if ((fd = open(wholedisk, O_RDONLY)) == -1) | |
855 | err(EXIT_FAILURE, _("%s: open failed"), wholedisk); | |
856 | ||
857 | if (what == ACT_DELETE) | |
858 | rc = del_parts(fd, wholedisk, disk_devno, lower, upper); | |
859 | else { | |
860 | blkid_probe pr = blkid_new_probe(); | |
861 | blkid_partlist ls = NULL; | |
862 | ||
863 | if (!pr || blkid_probe_set_device(pr, fd, 0, 0)) | |
864 | warnx(_("%s: failed to initialize blkid prober"), | |
865 | wholedisk); | |
866 | else | |
867 | ls = get_partlist(pr, wholedisk, type); | |
868 | ||
869 | if (ls) { | |
870 | int n = blkid_partlist_numof_partitions(ls); | |
871 | ||
872 | if (lower < 0) | |
873 | lower = n + lower + 1; | |
874 | if (upper < 0) | |
875 | upper = n + upper + 1; | |
876 | if (lower > upper) { | |
144df9a2 | 877 | warnx(_("specified range <%d:%d> " |
c4ecaf21 DB |
878 | "does not make sense"), lower, upper); |
879 | rc = -1, what = 0; | |
880 | } | |
881 | ||
882 | switch (what) { | |
883 | case ACT_SHOW: | |
884 | rc = show_parts(ls, tt_flags, lower, upper); | |
885 | break; | |
886 | case ACT_LIST: | |
887 | rc = list_parts(ls, lower, upper); | |
888 | break; | |
889 | case ACT_ADD: | |
890 | rc = add_parts(fd, wholedisk, ls, lower, upper); | |
891 | break; | |
892 | } | |
893 | } | |
894 | blkid_free_probe(pr); | |
895 | } | |
896 | ||
0e938113 DB |
897 | if (loopdev) |
898 | loopcxt_deinit(&lc); | |
899 | ||
c4ecaf21 DB |
900 | close(fd); |
901 | return rc ? EXIT_FAILURE : EXIT_SUCCESS; | |
22853e4a | 902 | } |
c4ecaf21 | 903 |