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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" |
757bbfad | 36 | #include "closestream.h" |
6320c5aa | 37 | #include "optutils.h" |
22853e4a | 38 | |
c4ecaf21 DB |
39 | /* this is the default upper limit, could be modified by --nr */ |
40 | #define SLICES_MAX 256 | |
41 | ||
42 | /* all the columns (-o option) */ | |
43 | enum { | |
44 | COL_PARTNO, | |
45 | COL_START, | |
46 | COL_END, | |
47 | COL_SECTORS, | |
48 | COL_SIZE, | |
49 | COL_NAME, | |
50 | COL_UUID, | |
51 | COL_TYPE, | |
5de966b3 KZ |
52 | COL_FLAGS, |
53 | COL_SCHEME, | |
c4ecaf21 | 54 | }; |
22853e4a | 55 | |
6320c5aa | 56 | #define ACT_ERROR "--{add,delete,show,list,raw,pairs}" |
c4ecaf21 | 57 | enum { |
6320c5aa SK |
58 | ACT_NONE, |
59 | ACT_LIST, | |
c4ecaf21 DB |
60 | ACT_SHOW, |
61 | ACT_ADD, | |
62 | ACT_DELETE | |
63 | }; | |
64 | ||
65 | enum { | |
66 | FL_BYTES = (1 << 1) | |
67 | }; | |
68 | ||
69 | /* column names */ | |
70 | struct colinfo { | |
71 | const char *name; /* header */ | |
72 | double whint; /* width hint (N < 1 is in percent of termwidth) */ | |
73 | int flags; /* TT_FL_* */ | |
74 | const char *help; | |
75 | }; | |
22853e4a | 76 | |
c4ecaf21 | 77 | /* columns descriptions */ |
10ebfeea | 78 | struct colinfo infos[] = { |
5de966b3 | 79 | [COL_PARTNO] = { "NR", 0.25, TT_FL_RIGHT, N_("partition number") }, |
c4ecaf21 DB |
80 | [COL_START] = { "START", 0.30, TT_FL_RIGHT, N_("start of the partition in sectors") }, |
81 | [COL_END] = { "END", 0.30, TT_FL_RIGHT, N_("end of the partition in sectors") }, | |
82 | [COL_SECTORS] = { "SECTORS", 0.30, TT_FL_RIGHT, N_("number of sectors") }, | |
83 | [COL_SIZE] = { "SIZE", 0.30, TT_FL_RIGHT, N_("human readable size") }, | |
84 | [COL_NAME] = { "NAME", 0.30, TT_FL_TRUNC, N_("partition name") }, | |
85 | [COL_UUID] = { "UUID", 36, 0, N_("partition UUID")}, | |
5de966b3 KZ |
86 | [COL_SCHEME] = { "SCHEME", 0.1, TT_FL_TRUNC, N_("partition table type (dos, gpt, ...)")}, |
87 | [COL_FLAGS] = { "FLAGS", 0.1, TT_FL_TRUNC, N_("partition flags")}, | |
88 | [COL_TYPE] = { "TYPE", 1, TT_FL_RIGHT, N_("partition type hex or uuid")}, | |
c4ecaf21 | 89 | }; |
10ebfeea DB |
90 | |
91 | #define NCOLS ARRAY_SIZE(infos) | |
92 | ||
c4ecaf21 | 93 | /* array with IDs of enabled columns */ |
10ebfeea | 94 | static int columns[NCOLS], ncolumns; |
c4ecaf21 DB |
95 | |
96 | static int verbose; | |
97 | static int partx_flags; | |
0e938113 DB |
98 | static struct loopdev_cxt lc; |
99 | static int loopdev; | |
22853e4a | 100 | |
0e938113 DB |
101 | static void assoc_loopdev(const char *fname) |
102 | { | |
103 | int rc; | |
104 | ||
defa0710 KZ |
105 | if (loopcxt_init(&lc, 0)) |
106 | err(EXIT_FAILURE, _("failed to initialize loopcxt")); | |
0e938113 DB |
107 | |
108 | rc = loopcxt_find_unused(&lc); | |
109 | if (rc) | |
110 | err(EXIT_FAILURE, _("%s: failed to find unused loop device"), | |
111 | fname); | |
112 | ||
113 | if (verbose) | |
114 | printf(_("Trying to use '%s' for the loop device\n"), | |
115 | loopcxt_get_device(&lc)); | |
116 | ||
117 | if (loopcxt_set_backing_file(&lc, fname)) | |
118 | err(EXIT_FAILURE, _("%s: failed to set backing file"), fname); | |
119 | ||
120 | rc = loopcxt_setup_device(&lc); | |
121 | ||
122 | if (rc == -EBUSY) | |
123 | err(EXIT_FAILURE, _("%s: failed to setup loop device"), fname); | |
124 | ||
125 | loopdev = 1; | |
126 | } | |
22853e4a | 127 | |
c4ecaf21 | 128 | static inline int get_column_id(int num) |
1d4ad1de | 129 | { |
10ebfeea | 130 | assert(ARRAY_SIZE(columns) == NCOLS); |
c4ecaf21 | 131 | assert(num < ncolumns); |
10ebfeea | 132 | assert(columns[num] < (int) NCOLS); |
c4ecaf21 | 133 | return columns[num]; |
22853e4a KZ |
134 | } |
135 | ||
c4ecaf21 | 136 | static inline struct colinfo *get_column_info(int num) |
1d4ad1de | 137 | { |
c4ecaf21 | 138 | return &infos[ get_column_id(num) ]; |
22853e4a KZ |
139 | } |
140 | ||
c4ecaf21 DB |
141 | static int column_name_to_id(const char *name, size_t namesz) |
142 | { | |
10ebfeea | 143 | size_t i; |
22853e4a | 144 | |
c4ecaf21 | 145 | assert(name); |
22853e4a | 146 | |
10ebfeea | 147 | for (i = 0; i < NCOLS; i++) { |
c4ecaf21 | 148 | const char *cn = infos[i].name; |
22853e4a | 149 | |
c4ecaf21 DB |
150 | if (!strncasecmp(name, cn, namesz) && !*(cn + namesz)) |
151 | return i; | |
22853e4a | 152 | } |
c4ecaf21 DB |
153 | warnx(_("unknown column: %s"), name); |
154 | return -1; | |
155 | } | |
22853e4a | 156 | |
c4ecaf21 DB |
157 | /* |
158 | * Given a partition return the corresponding partition number. | |
159 | * | |
160 | * Note that this function tries to use sysfs, otherwise it assumes that the | |
161 | * last characters are always numeric (sda1, sdc20, etc). | |
c4ecaf21 DB |
162 | */ |
163 | static int get_partno_from_device(char *partition, dev_t devno) | |
164 | { | |
165 | int partno = 0; | |
166 | size_t sz; | |
167 | char *p, *end = NULL; | |
168 | ||
169 | assert(partition); | |
170 | ||
171 | if (devno) { | |
a88268b8 | 172 | struct sysfs_cxt cxt; |
43e3f054 | 173 | int rc; |
a88268b8 | 174 | |
5bfbbc78 KZ |
175 | if (sysfs_init(&cxt, devno, NULL)) |
176 | goto err; | |
177 | ||
43e3f054 KZ |
178 | rc = sysfs_read_int(&cxt, "partition", &partno); |
179 | sysfs_deinit(&cxt); | |
180 | ||
181 | if (rc == 0) | |
c4ecaf21 DB |
182 | return partno; |
183 | } | |
22853e4a | 184 | |
c4ecaf21 DB |
185 | sz = strlen(partition); |
186 | p = partition + sz - 1; | |
22853e4a | 187 | |
c4ecaf21 DB |
188 | if (!isdigit((unsigned int) *p)) |
189 | goto err; | |
22853e4a | 190 | |
c4ecaf21 DB |
191 | while (isdigit((unsigned int) *(p - 1))) p--; |
192 | ||
193 | errno = 0; | |
194 | partno = strtol(p, &end, 10); | |
195 | if (errno || !end || *end || p == end) | |
196 | goto err; | |
197 | ||
198 | return partno; | |
199 | err: | |
200 | errx(EXIT_FAILURE, _("%s: failed to get partition number"), partition); | |
201 | } | |
202 | ||
203 | static int get_max_partno(const char *disk, dev_t devno) | |
204 | { | |
741a5b10 | 205 | char path[PATH_MAX], *parent, *dirname = NULL; |
c4ecaf21 DB |
206 | struct stat st; |
207 | DIR *dir; | |
208 | struct dirent *d; | |
209 | int partno = 0; | |
210 | ||
211 | if (!devno && !stat(disk, &st)) | |
212 | devno = st.st_rdev; | |
213 | if (!devno) | |
214 | goto dflt; | |
215 | parent = strrchr(disk, '/'); | |
216 | if (!parent) | |
217 | goto dflt; | |
218 | parent++; | |
219 | ||
220 | snprintf(path, sizeof(path), _PATH_SYS_DEVBLOCK "/%d:%d/", | |
221 | major(devno), minor(devno)); | |
222 | ||
223 | dir = opendir(path); | |
224 | if (!dir) | |
225 | goto dflt; | |
226 | ||
741a5b10 KZ |
227 | dirname = xstrdup(path); |
228 | ||
229 | while ((d = readdir(dir))) { | |
c4ecaf21 DB |
230 | int fd; |
231 | ||
232 | if (!strcmp(d->d_name, ".") || | |
233 | !strcmp(d->d_name, "..")) | |
234 | continue; | |
235 | #ifdef _DIRENT_HAVE_D_TYPE | |
236 | if (d->d_type != DT_DIR) | |
237 | continue; | |
238 | #endif | |
239 | if (strncmp(parent, d->d_name, strlen(parent))) | |
240 | continue; | |
241 | snprintf(path, sizeof(path), "%s/partition", d->d_name); | |
242 | ||
741a5b10 | 243 | fd = open_at(dirfd(dir), dirname, path, O_RDONLY); |
c4ecaf21 DB |
244 | if (fd) { |
245 | int x = 0; | |
246 | FILE *f = fdopen(fd, "r"); | |
247 | if (f) { | |
248 | if (fscanf(f, "%d", &x) == 1 && x > partno) | |
249 | partno = x; | |
250 | fclose(f); | |
22853e4a | 251 | } |
22853e4a | 252 | } |
22853e4a KZ |
253 | } |
254 | ||
741a5b10 | 255 | free(dirname); |
c4ecaf21 DB |
256 | closedir(dir); |
257 | return partno; | |
258 | dflt: | |
259 | return SLICES_MAX; | |
260 | } | |
261 | ||
262 | static void del_parts_warnx(const char *device, int first, int last) | |
263 | { | |
264 | if (first == last) | |
265 | warnx(_("%s: error deleting partition %d"), device, first); | |
266 | else | |
267 | warnx(_("%s: error deleting partitions %d-%d"), | |
268 | device, first, last); | |
269 | } | |
270 | ||
271 | static int del_parts(int fd, const char *device, dev_t devno, | |
272 | int lower, int upper) | |
273 | { | |
274 | int rc = 0, i, errfirst = 0, errlast = 0; | |
275 | ||
276 | assert(fd >= 0); | |
277 | assert(device); | |
278 | ||
279 | if (!lower) | |
280 | lower = 1; | |
281 | if (!upper || lower < 0 || upper < 0) { | |
282 | int n = get_max_partno(device, devno); | |
283 | if (!upper) | |
284 | upper = n; | |
285 | else if (upper < 0) | |
286 | upper = n + upper + 1; | |
287 | if (lower < 0) | |
288 | lower = n + lower + 1; | |
289 | } | |
290 | if (lower > upper) { | |
144df9a2 | 291 | warnx(_("specified range <%d:%d> " |
c4ecaf21 DB |
292 | "does not make sense"), lower, upper); |
293 | return -1; | |
294 | } | |
295 | ||
296 | for (i = lower; i <= upper; i++) { | |
ab025087 PS |
297 | rc = partx_del_partition(fd, i); |
298 | if (rc == 0) { | |
c4ecaf21 DB |
299 | if (verbose) |
300 | printf(_("%s: partition #%d removed\n"), device, i); | |
301 | continue; | |
ab025087 PS |
302 | } else if (errno == ENXIO) { |
303 | if (verbose) | |
304 | printf(_("%s: partition #%d already doesn't exist\n"), device, i); | |
305 | continue; | |
c4ecaf21 DB |
306 | } |
307 | rc = -1; | |
308 | if (verbose) | |
144df9a2 | 309 | warn(_("%s: deleting partition #%d failed"), device, i); |
c4ecaf21 DB |
310 | if (!errfirst) |
311 | errlast = errfirst = i; | |
312 | else if (errlast + 1 == i) | |
313 | errlast++; | |
314 | else { | |
315 | del_parts_warnx(device, errfirst, errlast); | |
316 | errlast = errfirst = i; | |
22853e4a | 317 | } |
22853e4a KZ |
318 | } |
319 | ||
c4ecaf21 DB |
320 | if (errfirst) |
321 | del_parts_warnx(device, errfirst, errlast); | |
322 | return rc; | |
323 | } | |
324 | ||
0e938113 | 325 | |
c4ecaf21 DB |
326 | static void add_parts_warnx(const char *device, int first, int last) |
327 | { | |
328 | if (first == last) | |
329 | warnx(_("%s: error adding partition %d"), device, first); | |
330 | else | |
331 | warnx(_("%s: error adding partitions %d-%d"), | |
332 | device, first, last); | |
333 | } | |
334 | ||
335 | static int add_parts(int fd, const char *device, | |
0e938113 | 336 | blkid_partlist ls, int lower, int upper) |
c4ecaf21 DB |
337 | { |
338 | int i, nparts, rc = 0, errfirst = 0, errlast = 0; | |
339 | ||
340 | assert(fd >= 0); | |
341 | assert(device); | |
342 | assert(ls); | |
343 | ||
344 | nparts = blkid_partlist_numof_partitions(ls); | |
345 | ||
346 | for (i = 0; i < nparts; i++) { | |
347 | blkid_partition par = blkid_partlist_get_partition(ls, i); | |
348 | int n = blkid_partition_get_partno(par); | |
349 | uintmax_t start, size; | |
350 | ||
351 | if (lower && n < lower) | |
352 | continue; | |
353 | if (upper && n > upper) | |
354 | continue; | |
355 | ||
356 | start = blkid_partition_get_start(par); | |
357 | size = blkid_partition_get_size(par); | |
358 | ||
359 | if (blkid_partition_is_extended(par)) | |
360 | /* | |
144df9a2 BS |
361 | * Let's follow the Linux kernel and reduce |
362 | * DOS extended partition to 1 or 2 sectors. | |
c4ecaf21 DB |
363 | */ |
364 | size = min(size, (uintmax_t) 2); | |
365 | ||
366 | if (partx_add_partition(fd, n, start, size) == 0) { | |
367 | if (verbose) | |
368 | printf(_("%s: partition #%d added\n"), device, n); | |
369 | continue; | |
370 | } | |
371 | rc = -1; | |
372 | if (verbose) | |
144df9a2 | 373 | warn(_("%s: adding partition #%d failed"), device, n); |
c4ecaf21 DB |
374 | if (!errfirst) |
375 | errlast = errfirst = n; | |
376 | else if (errlast + 1 == n) | |
377 | errlast++; | |
378 | else { | |
379 | add_parts_warnx(device, errfirst, errlast); | |
380 | errlast = errfirst = n; | |
381 | } | |
22853e4a | 382 | } |
c4ecaf21 DB |
383 | |
384 | if (errfirst) | |
385 | add_parts_warnx(device, errfirst, errlast); | |
0e938113 | 386 | |
59d749c3 KZ |
387 | /* |
388 | * The kernel with enabled partitions scanner for loop devices add *all* | |
389 | * partitions, so we should delete any extra, unwanted ones, when the -n | |
390 | * option is passed. | |
391 | */ | |
392 | if (loopdev && loopcxt_is_partscan(&lc) && (lower || upper)) { | |
0e938113 DB |
393 | for (i = 0; i < nparts; i++) { |
394 | blkid_partition par = blkid_partlist_get_partition(ls, i); | |
395 | int n = blkid_partition_get_partno(par); | |
396 | ||
397 | if (n < lower || n > upper) | |
398 | partx_del_partition(fd, n); | |
399 | } | |
400 | } | |
401 | ||
c4ecaf21 DB |
402 | return rc; |
403 | } | |
404 | ||
405 | static int list_parts(blkid_partlist ls, int lower, int upper) | |
406 | { | |
407 | int i, nparts; | |
408 | ||
409 | assert(ls); | |
410 | ||
411 | nparts = blkid_partlist_numof_partitions(ls); | |
412 | ||
413 | for (i = 0; i < nparts; i++) { | |
414 | blkid_partition par = blkid_partlist_get_partition(ls, i); | |
415 | int n = blkid_partition_get_partno(par); | |
416 | uintmax_t start, size; | |
417 | ||
418 | if (lower && n < lower) | |
419 | continue; | |
420 | if (upper && n > upper) | |
421 | continue; | |
422 | ||
423 | start = blkid_partition_get_start(par); | |
424 | size = blkid_partition_get_size(par); | |
425 | ||
144df9a2 | 426 | printf(_("#%2d: %9ju-%9ju (%9ju sectors, %6ju MB)\n"), |
c4ecaf21 DB |
427 | n, start, start + size -1, |
428 | size, (size << 9) / 1000000); | |
22853e4a | 429 | } |
c4ecaf21 DB |
430 | return 0; |
431 | } | |
432 | ||
433 | static void add_tt_line(struct tt *tt, blkid_partition par) | |
434 | { | |
435 | struct tt_line *line; | |
436 | int i; | |
437 | ||
438 | assert(tt); | |
439 | assert(par); | |
22853e4a | 440 | |
c4ecaf21 DB |
441 | line = tt_add_line(tt, NULL); |
442 | if (!line) { | |
443 | warn(_("failed to add line to output")); | |
444 | return; | |
22853e4a | 445 | } |
22853e4a | 446 | |
c4ecaf21 DB |
447 | for (i = 0; i < ncolumns; i++) { |
448 | char *str = NULL; | |
449 | int rc = 0; | |
450 | ||
451 | switch (get_column_id(i)) { | |
452 | case COL_PARTNO: | |
6f312c89 | 453 | rc = xasprintf(&str, "%d", |
c4ecaf21 DB |
454 | blkid_partition_get_partno(par)); |
455 | break; | |
456 | case COL_START: | |
6f312c89 | 457 | rc = xasprintf(&str, "%ju", |
c4ecaf21 DB |
458 | blkid_partition_get_start(par)); |
459 | break; | |
460 | case COL_END: | |
6f312c89 | 461 | rc = xasprintf(&str, "%ju", |
c4ecaf21 DB |
462 | blkid_partition_get_start(par) + |
463 | blkid_partition_get_size(par) - 1); | |
464 | break; | |
465 | case COL_SECTORS: | |
6f312c89 | 466 | rc = xasprintf(&str, "%ju", |
c4ecaf21 DB |
467 | blkid_partition_get_size(par)); |
468 | break; | |
469 | case COL_SIZE: | |
470 | if (partx_flags & FL_BYTES) | |
6f312c89 | 471 | rc = xasprintf(&str, "%ju", (uintmax_t) |
c4ecaf21 | 472 | blkid_partition_get_size(par) << 9); |
5de966b3 | 473 | else |
5d2a9849 | 474 | str = size_to_human_string(SIZE_SUFFIX_1LETTER, |
c4ecaf21 | 475 | blkid_partition_get_size(par) << 9); |
c4ecaf21 DB |
476 | break; |
477 | case COL_NAME: | |
478 | str = (char *) blkid_partition_get_name(par); | |
5de966b3 KZ |
479 | if (str) |
480 | str = xstrdup(str); | |
c4ecaf21 DB |
481 | break; |
482 | case COL_UUID: | |
483 | str = (char *) blkid_partition_get_uuid(par); | |
5de966b3 KZ |
484 | if (str) |
485 | str = xstrdup(str); | |
c4ecaf21 DB |
486 | break; |
487 | case COL_TYPE: | |
5de966b3 KZ |
488 | str = (char *) blkid_partition_get_type_string(par); |
489 | if (str) | |
490 | str = xstrdup(str); | |
491 | else | |
6f312c89 | 492 | rc = xasprintf(&str, "0x%x", |
5de966b3 | 493 | blkid_partition_get_type(par)); |
c4ecaf21 | 494 | break; |
5de966b3 | 495 | case COL_FLAGS: |
6f312c89 | 496 | rc = xasprintf(&str, "0x%llx", blkid_partition_get_flags(par)); |
5de966b3 KZ |
497 | break; |
498 | case COL_SCHEME: | |
499 | { | |
500 | blkid_parttable tab = blkid_partition_get_table(par); | |
501 | if (tab) { | |
502 | str = (char *) blkid_parttable_get_type(tab); | |
503 | if (str) | |
504 | str = xstrdup(str); | |
505 | } | |
506 | break; | |
507 | } | |
c4ecaf21 DB |
508 | default: |
509 | break; | |
510 | } | |
511 | ||
5de966b3 | 512 | if (rc || str) |
c4ecaf21 | 513 | tt_line_set_data(line, i, str); |
22853e4a | 514 | } |
c4ecaf21 | 515 | } |
22853e4a | 516 | |
c4ecaf21 DB |
517 | static int show_parts(blkid_partlist ls, int tt_flags, int lower, int upper) |
518 | { | |
519 | int i, rc = -1; | |
520 | struct tt *tt; | |
521 | int nparts; | |
22853e4a | 522 | |
c4ecaf21 DB |
523 | assert(ls); |
524 | ||
525 | nparts = blkid_partlist_numof_partitions(ls); | |
526 | if (!nparts) | |
527 | return 0; | |
528 | ||
529 | tt = tt_new_table(tt_flags); | |
530 | if (!tt) { | |
531 | warn(_("failed to initialize output table")); | |
532 | return -1; | |
22853e4a | 533 | } |
22853e4a | 534 | |
c4ecaf21 DB |
535 | for (i = 0; i < ncolumns; i++) { |
536 | struct colinfo *col = get_column_info(i); | |
537 | ||
538 | if (!tt_define_column(tt, col->name, col->whint, col->flags)) { | |
539 | warnx(_("failed to initialize output column")); | |
540 | goto done; | |
22853e4a KZ |
541 | } |
542 | } | |
543 | ||
c4ecaf21 DB |
544 | for (i = 0; i < nparts; i++) { |
545 | blkid_partition par = blkid_partlist_get_partition(ls, i); | |
546 | int n = blkid_partition_get_partno(par); | |
22853e4a | 547 | |
c4ecaf21 DB |
548 | if (lower && n < lower) |
549 | continue; | |
550 | if (upper && n > upper) | |
551 | continue; | |
22853e4a | 552 | |
c4ecaf21 | 553 | add_tt_line(tt, par); |
22853e4a | 554 | } |
c4ecaf21 DB |
555 | |
556 | rc = 0; | |
557 | tt_print_table(tt); | |
558 | done: | |
559 | tt_free_table(tt); | |
560 | return rc; | |
22853e4a KZ |
561 | } |
562 | ||
c4ecaf21 DB |
563 | static blkid_partlist get_partlist(blkid_probe pr, |
564 | const char *device, char *type) | |
565 | { | |
566 | blkid_partlist ls; | |
567 | blkid_parttable tab; | |
568 | ||
569 | assert(pr); | |
570 | assert(device); | |
571 | ||
572 | if (type) { | |
573 | char *name[] = { type, NULL }; | |
574 | ||
575 | if (blkid_probe_filter_partitions_type(pr, | |
576 | BLKID_FLTR_ONLYIN, name)) { | |
577 | warnx(_("failed to initialize blkid " | |
144df9a2 | 578 | "filter for '%s'"), type); |
c4ecaf21 DB |
579 | return NULL; |
580 | } | |
581 | } | |
582 | ||
583 | ls = blkid_probe_get_partitions(pr); | |
584 | if (!ls) { | |
585 | warnx(_("%s: failed to read partition table"), device); | |
586 | return NULL; | |
587 | } | |
588 | ||
589 | tab = blkid_partlist_get_table(ls); | |
83ae4c24 | 590 | if (verbose && tab) { |
144df9a2 | 591 | printf(_("%s: partition table type '%s' detected\n"), |
83ae4c24 | 592 | device, blkid_parttable_get_type(tab)); |
c4ecaf21 | 593 | |
83ae4c24 KZ |
594 | if (!blkid_partlist_numof_partitions(ls)) |
595 | printf(_("%s: partition table with no partitions"), device); | |
22853e4a | 596 | } |
83ae4c24 | 597 | |
c4ecaf21 DB |
598 | return ls; |
599 | } | |
600 | ||
abafd686 | 601 | static void __attribute__((__noreturn__)) usage(FILE *out) |
c4ecaf21 | 602 | { |
10ebfeea | 603 | size_t i; |
c4ecaf21 | 604 | |
4ded3823 | 605 | fputs(USAGE_HEADER, out); |
e96fd176 | 606 | fprintf(out, |
b37155e2 | 607 | _(" %s [-a|-d|-s] [--nr <n:m> | <partition>] <disk>\n"), |
c4ecaf21 DB |
608 | program_invocation_short_name); |
609 | ||
8275b732 | 610 | fputs(USAGE_OPTIONS, out); |
e96fd176 | 611 | fputs(_(" -a, --add add specified partitions or all of them\n" |
c4ecaf21 DB |
612 | " -d, --delete delete specified partitions or all of them\n" |
613 | " -l, --list list partitions (DEPRECATED)\n" | |
614 | " -s, --show list partitions\n\n" | |
615 | ||
616 | " -b, --bytes print SIZE in bytes rather than in human readable format\n" | |
617 | " -g, --noheadings don't print headings for --show\n" | |
8275b732 KZ |
618 | " -n, --nr <n:m> specify the range of partitions (e.g. --nr 2:4)\n" |
619 | " -o, --output <type> define which output columns to use\n" | |
8ed48785 KZ |
620 | " -P, --pairs use key=\"value\" output format\n" |
621 | " -r, --raw use raw output format\n" | |
b37155e2 | 622 | " -t, --type <type> specify the partition type (dos, bsd, solaris, etc.)\n" |
8275b732 KZ |
623 | " -v, --verbose verbose mode\n"), out); |
624 | ||
625 | fputs(USAGE_SEPARATOR, out); | |
626 | fputs(USAGE_HELP, out); | |
627 | fputs(USAGE_VERSION, out); | |
c4ecaf21 | 628 | |
e96fd176 | 629 | fputs(_("\nAvailable columns (for --show, --raw or --pairs):\n"), out); |
c4ecaf21 | 630 | |
10ebfeea | 631 | for (i = 0; i < NCOLS; i++) |
d015794e | 632 | fprintf(out, " %10s %s\n", infos[i].name, _(infos[i].help)); |
c4ecaf21 | 633 | |
4ded3823 | 634 | fprintf(out, USAGE_MAN_TAIL("partx(8)")); |
c4ecaf21 DB |
635 | |
636 | exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS); | |
637 | } | |
638 | ||
c4ecaf21 DB |
639 | int main(int argc, char **argv) |
640 | { | |
6320c5aa | 641 | int fd, c, what = ACT_NONE, lower = 0, upper = 0, rc = 0; |
c4ecaf21 DB |
642 | int tt_flags = 0; |
643 | char *type = NULL; | |
1d6a5daa | 644 | char *device = NULL; /* pointer to argv[], ie: /dev/sda1 */ |
c4ecaf21 DB |
645 | char *wholedisk = NULL; /* allocated, ie: /dev/sda */ |
646 | dev_t disk_devno = 0, part_devno = 0; | |
647 | ||
648 | static const struct option long_opts[] = { | |
649 | { "bytes", no_argument, NULL, 'b' }, | |
650 | { "noheadings", no_argument, NULL, 'g' }, | |
651 | { "raw", no_argument, NULL, 'r' }, | |
652 | { "list", no_argument, NULL, 'l' }, | |
653 | { "show", no_argument, NULL, 's' }, | |
654 | { "add", no_argument, NULL, 'a' }, | |
655 | { "delete", no_argument, NULL, 'd' }, | |
656 | { "type", required_argument, NULL, 't' }, | |
657 | { "nr", required_argument, NULL, 'n' }, | |
658 | { "output", required_argument, NULL, 'o' }, | |
8ed48785 | 659 | { "pairs", no_argument, NULL, 'P' }, |
c4ecaf21 | 660 | { "help", no_argument, NULL, 'h' }, |
72bb1cc9 | 661 | { "version", no_argument, NULL, 'V' }, |
8275b732 | 662 | { "verbose", no_argument, NULL, 'v' }, |
c4ecaf21 DB |
663 | { NULL, 0, NULL, 0 } |
664 | }; | |
665 | ||
5c87aa1a BS |
666 | setlocale(LC_ALL, ""); |
667 | bindtextdomain(PACKAGE, LOCALEDIR); | |
668 | textdomain(PACKAGE); | |
757bbfad | 669 | atexit(close_stdout); |
5c87aa1a | 670 | |
8ed48785 | 671 | while ((c = getopt_long(argc, argv, |
72bb1cc9 | 672 | "abdglrsvn:t:o:PhV", long_opts, NULL)) != -1) { |
c4ecaf21 DB |
673 | switch(c) { |
674 | case 'a': | |
6320c5aa | 675 | exclusive_option(&what, ACT_ADD, ACT_ERROR); |
c4ecaf21 DB |
676 | break; |
677 | case 'b': | |
678 | partx_flags |= FL_BYTES; | |
679 | break; | |
680 | case 'd': | |
6320c5aa | 681 | exclusive_option(&what, ACT_DELETE, ACT_ERROR); |
c4ecaf21 DB |
682 | break; |
683 | case 'g': | |
684 | tt_flags |= TT_FL_NOHEADINGS; | |
685 | break; | |
686 | case 'l': | |
6320c5aa | 687 | exclusive_option(&what, ACT_LIST, ACT_ERROR); |
c4ecaf21 DB |
688 | break; |
689 | case 'n': | |
af7df9ee | 690 | if (parse_range(optarg, &lower, &upper, 0)) |
c4ecaf21 DB |
691 | errx(EXIT_FAILURE, _("failed to parse --nr <M-N> range")); |
692 | break; | |
c4ecaf21 | 693 | case 'o': |
c87638ad | 694 | ncolumns = string_to_idarray(optarg, |
bdc3ed66 KZ |
695 | columns, ARRAY_SIZE(columns), |
696 | column_name_to_id); | |
697 | if (ncolumns < 0) | |
c4ecaf21 | 698 | return EXIT_FAILURE; |
6320c5aa | 699 | exclusive_option(&what, ACT_SHOW, ACT_ERROR); |
c4ecaf21 | 700 | break; |
8ed48785 KZ |
701 | case 'P': |
702 | tt_flags |= TT_FL_EXPORT; | |
6320c5aa | 703 | exclusive_option(&what, ACT_SHOW, ACT_ERROR); |
8ed48785 | 704 | break; |
c4ecaf21 DB |
705 | case 'r': |
706 | tt_flags |= TT_FL_RAW; | |
6320c5aa | 707 | exclusive_option(&what, ACT_SHOW, ACT_ERROR); |
c4ecaf21 | 708 | break; |
c4ecaf21 | 709 | case 's': |
6320c5aa | 710 | exclusive_option(&what, ACT_SHOW, ACT_ERROR); |
c4ecaf21 DB |
711 | break; |
712 | case 't': | |
713 | type = optarg; | |
714 | break; | |
715 | case 'v': | |
716 | verbose = 1; | |
717 | break; | |
718 | case 'h': | |
719 | usage(stdout); | |
72bb1cc9 SK |
720 | case 'V': |
721 | printf(UTIL_LINUX_VERSION); | |
722 | return EXIT_SUCCESS; | |
c4ecaf21 DB |
723 | case '?': |
724 | default: | |
725 | usage(stderr); | |
726 | } | |
727 | } | |
728 | ||
6320c5aa | 729 | if (what == ACT_NONE) |
7cfd1b26 | 730 | what = ACT_SHOW; |
c4ecaf21 DB |
731 | |
732 | /* --show default, could by modified by -o */ | |
733 | if (what == ACT_SHOW && !ncolumns) { | |
734 | columns[ncolumns++] = COL_PARTNO; | |
735 | columns[ncolumns++] = COL_START; | |
736 | columns[ncolumns++] = COL_END; | |
737 | columns[ncolumns++] = COL_SECTORS; | |
738 | columns[ncolumns++] = COL_SIZE; | |
739 | columns[ncolumns++] = COL_NAME; | |
740 | columns[ncolumns++] = COL_UUID; | |
741 | } | |
742 | ||
743 | /* | |
744 | * Note that 'partx /dev/sda1' == 'partx /dev/sda1 /dev/sda' | |
745 | * so assume that the device and/or disk are always the last | |
746 | * arguments to be passed to partx. | |
747 | */ | |
748 | if (optind == argc - 2) { | |
749 | /* passed 2 arguments: | |
750 | * /dev/sda1 /dev/sda : partition + whole-disk | |
751 | * -- /dev/sda1 : partition that should be used as a whole-disk | |
752 | */ | |
753 | device = argv[optind]; | |
754 | ||
755 | if (strcmp(device, "-") == 0) { | |
756 | device = NULL; | |
757 | wholedisk = xstrdup(argv[optind + 1]); | |
758 | } else { | |
759 | device = argv[optind]; | |
760 | wholedisk = xstrdup(argv[optind + 1]); | |
761 | } | |
762 | } else if (optind == argc - 1) { | |
763 | /* passed only one arg (ie: /dev/sda3 or /dev/sda) */ | |
764 | struct stat sb; | |
765 | ||
766 | device = argv[optind]; | |
767 | ||
768 | if (stat(device, &sb)) | |
add1b8af | 769 | err(EXIT_FAILURE, _("stat failed %s"), device); |
c4ecaf21 DB |
770 | |
771 | part_devno = sb.st_rdev; | |
772 | ||
773 | if (blkid_devno_to_wholedisk(part_devno, | |
774 | NULL, 0, &disk_devno) == 0 && | |
775 | part_devno != disk_devno) | |
776 | wholedisk = blkid_devno_to_devname(disk_devno); | |
777 | ||
778 | if (!wholedisk) { | |
779 | wholedisk = xstrdup(device); | |
780 | disk_devno = part_devno; | |
781 | device = NULL; | |
782 | part_devno = 0; | |
22853e4a | 783 | } |
22853e4a | 784 | } else |
c4ecaf21 DB |
785 | usage(stderr); |
786 | ||
787 | if (device && (upper || lower)) | |
e22d8b95 | 788 | errx(EXIT_FAILURE, _("--nr and <partition> are mutually exclusive")); |
c4ecaf21 DB |
789 | |
790 | assert(wholedisk); | |
791 | ||
792 | if (device) { | |
793 | /* use partno from given partition instead of --nr range, e.g: | |
794 | * partx -d /dev/sda3 | |
795 | * is the same like: | |
796 | * partx -d --nr 3 /dev/sda | |
797 | */ | |
798 | struct stat sb; | |
799 | ||
800 | if (!part_devno && !stat(device, &sb)) | |
801 | part_devno = sb.st_rdev; | |
802 | ||
803 | lower = upper = get_partno_from_device(device, part_devno); | |
804 | } | |
805 | ||
806 | if (verbose) | |
144df9a2 | 807 | printf(_("partition: %s, disk: %s, lower: %d, upper: %d\n"), |
2e2b6bb1 | 808 | device ? device : "none", wholedisk, lower, upper); |
c4ecaf21 DB |
809 | |
810 | if (what == ACT_ADD || what == ACT_DELETE) { | |
811 | struct stat x; | |
812 | ||
0e938113 DB |
813 | if (stat(wholedisk, &x)) |
814 | errx(EXIT_FAILURE, "%s", wholedisk); | |
815 | ||
816 | if (S_ISREG(x.st_mode)) { | |
817 | /* not a blkdev, try to associate it to a loop device */ | |
818 | if (what == ACT_DELETE) | |
819 | errx(EXIT_FAILURE, _("%s: cannot delete partitions"), | |
820 | wholedisk); | |
59d749c3 | 821 | if (!loopmod_supports_partscan()) |
0e938113 DB |
822 | errx(EXIT_FAILURE, _("%s: partitioned loop devices unsupported"), |
823 | wholedisk); | |
824 | assoc_loopdev(wholedisk); | |
825 | wholedisk = xstrdup(lc.device); | |
826 | } else if (!S_ISBLK(x.st_mode)) | |
c4ecaf21 DB |
827 | errx(EXIT_FAILURE, _("%s: not a block device"), wholedisk); |
828 | } | |
829 | if ((fd = open(wholedisk, O_RDONLY)) == -1) | |
289dcc90 | 830 | err(EXIT_FAILURE, _("cannot open %s"), wholedisk); |
c4ecaf21 DB |
831 | |
832 | if (what == ACT_DELETE) | |
833 | rc = del_parts(fd, wholedisk, disk_devno, lower, upper); | |
834 | else { | |
835 | blkid_probe pr = blkid_new_probe(); | |
836 | blkid_partlist ls = NULL; | |
837 | ||
838 | if (!pr || blkid_probe_set_device(pr, fd, 0, 0)) | |
839 | warnx(_("%s: failed to initialize blkid prober"), | |
840 | wholedisk); | |
841 | else | |
842 | ls = get_partlist(pr, wholedisk, type); | |
843 | ||
844 | if (ls) { | |
845 | int n = blkid_partlist_numof_partitions(ls); | |
846 | ||
847 | if (lower < 0) | |
848 | lower = n + lower + 1; | |
849 | if (upper < 0) | |
850 | upper = n + upper + 1; | |
851 | if (lower > upper) { | |
144df9a2 | 852 | warnx(_("specified range <%d:%d> " |
c4ecaf21 | 853 | "does not make sense"), lower, upper); |
6320c5aa | 854 | rc = -1, what = ACT_NONE; |
c4ecaf21 DB |
855 | } |
856 | ||
857 | switch (what) { | |
858 | case ACT_SHOW: | |
859 | rc = show_parts(ls, tt_flags, lower, upper); | |
860 | break; | |
861 | case ACT_LIST: | |
862 | rc = list_parts(ls, lower, upper); | |
863 | break; | |
864 | case ACT_ADD: | |
865 | rc = add_parts(fd, wholedisk, ls, lower, upper); | |
866 | break; | |
6320c5aa SK |
867 | case ACT_NONE: |
868 | break; | |
869 | default: | |
870 | abort(); | |
c4ecaf21 DB |
871 | } |
872 | } | |
873 | blkid_free_probe(pr); | |
874 | } | |
875 | ||
0e938113 DB |
876 | if (loopdev) |
877 | loopcxt_deinit(&lc); | |
878 | ||
c4ecaf21 DB |
879 | close(fd); |
880 | return rc ? EXIT_FAILURE : EXIT_SUCCESS; | |
22853e4a | 881 | } |