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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
1b992147 | 2 | |
3f6fd1ba | 3 | #include <getopt.h> |
932ad62b | 4 | #include <utmp.h> |
1b992147 | 5 | |
b5efdb8a | 6 | #include "alloc-util.h" |
1b992147 LP |
7 | #include "conf-files.h" |
8 | #include "copy.h" | |
a0f29c76 LP |
9 | #include "def.h" |
10 | #include "fd-util.h" | |
f7f628b5 | 11 | #include "fileio-label.h" |
f97b34a6 | 12 | #include "format-util.h" |
dcd5c891 | 13 | #include "fs-util.h" |
3f6fd1ba | 14 | #include "hashmap.h" |
dcd5c891 | 15 | #include "pager.h" |
3f6fd1ba LP |
16 | #include "path-util.h" |
17 | #include "selinux-util.h" | |
07630cea | 18 | #include "smack-util.h" |
3f6fd1ba | 19 | #include "specifier.h" |
07630cea | 20 | #include "string-util.h" |
3f6fd1ba | 21 | #include "strv.h" |
ec0327d6 | 22 | #include "terminal-util.h" |
3f6fd1ba | 23 | #include "uid-range.h" |
a0f29c76 | 24 | #include "user-util.h" |
3f6fd1ba LP |
25 | #include "utf8.h" |
26 | #include "util.h" | |
1b992147 LP |
27 | |
28 | typedef enum ItemType { | |
29 | ADD_USER = 'u', | |
30 | ADD_GROUP = 'g', | |
a12b0cc3 | 31 | ADD_MEMBER = 'm', |
8530dc44 | 32 | ADD_RANGE = 'r', |
1b992147 | 33 | } ItemType; |
dcd5c891 | 34 | |
1b992147 LP |
35 | typedef struct Item { |
36 | ItemType type; | |
37 | ||
38 | char *name; | |
39 | char *uid_path; | |
40 | char *gid_path; | |
41 | char *description; | |
7629889c | 42 | char *home; |
7b1aaf66 | 43 | char *shell; |
1b992147 LP |
44 | |
45 | gid_t gid; | |
46 | uid_t uid; | |
47 | ||
48 | bool gid_set:1; | |
fb959f14 ZJS |
49 | |
50 | /* When set the group with the specified gid must exist | |
51 | * and the check if a uid clashes with the gid is skipped. | |
52 | */ | |
b9ee05c2 | 53 | bool id_set_strict:1; |
fb959f14 | 54 | |
1b992147 LP |
55 | bool uid_set:1; |
56 | ||
c1b6b04f KS |
57 | bool todo_user:1; |
58 | bool todo_group:1; | |
1b992147 LP |
59 | } Item; |
60 | ||
61 | static char *arg_root = NULL; | |
ec0327d6 | 62 | static bool arg_cat_config = false; |
d16a1c1b | 63 | static const char *arg_replace = NULL; |
1b600bd5 | 64 | static bool arg_inline = false; |
0221d68a | 65 | static PagerFlags arg_pager_flags = 0; |
1b992147 | 66 | |
5bc9c980 MV |
67 | static OrderedHashmap *users = NULL, *groups = NULL; |
68 | static OrderedHashmap *todo_uids = NULL, *todo_gids = NULL; | |
69 | static OrderedHashmap *members = NULL; | |
1b992147 LP |
70 | |
71 | static Hashmap *database_uid = NULL, *database_user = NULL; | |
72 | static Hashmap *database_gid = NULL, *database_group = NULL; | |
73 | ||
fed1e721 | 74 | static uid_t search_uid = UID_INVALID; |
8530dc44 LP |
75 | static UidRange *uid_range = NULL; |
76 | static unsigned n_uid_range = 0; | |
1b992147 | 77 | |
1b992147 LP |
78 | static int load_user_database(void) { |
79 | _cleanup_fclose_ FILE *f = NULL; | |
80 | const char *passwd_path; | |
81 | struct passwd *pw; | |
82 | int r; | |
83 | ||
1d13f648 | 84 | passwd_path = prefix_roota(arg_root, "/etc/passwd"); |
1b992147 LP |
85 | f = fopen(passwd_path, "re"); |
86 | if (!f) | |
87 | return errno == ENOENT ? 0 : -errno; | |
88 | ||
d5099efc | 89 | r = hashmap_ensure_allocated(&database_user, &string_hash_ops); |
1b992147 LP |
90 | if (r < 0) |
91 | return r; | |
92 | ||
d5099efc | 93 | r = hashmap_ensure_allocated(&database_uid, NULL); |
1b992147 LP |
94 | if (r < 0) |
95 | return r; | |
96 | ||
100d5f6e | 97 | while ((r = fgetpwent_sane(f, &pw)) > 0) { |
43e948ee | 98 | char *n; |
340ac019 | 99 | int k, q; |
1b992147 LP |
100 | |
101 | n = strdup(pw->pw_name); | |
102 | if (!n) | |
103 | return -ENOMEM; | |
104 | ||
105 | k = hashmap_put(database_user, n, UID_TO_PTR(pw->pw_uid)); | |
106 | if (k < 0 && k != -EEXIST) { | |
107 | free(n); | |
108 | return k; | |
109 | } | |
110 | ||
111 | q = hashmap_put(database_uid, UID_TO_PTR(pw->pw_uid), n); | |
112 | if (q < 0 && q != -EEXIST) { | |
43e948ee | 113 | if (k <= 0) |
1b992147 LP |
114 | free(n); |
115 | return q; | |
116 | } | |
117 | ||
340ac019 | 118 | if (k <= 0 && q <= 0) |
1b992147 | 119 | free(n); |
1b992147 | 120 | } |
100d5f6e | 121 | return r; |
1b992147 LP |
122 | } |
123 | ||
124 | static int load_group_database(void) { | |
125 | _cleanup_fclose_ FILE *f = NULL; | |
126 | const char *group_path; | |
127 | struct group *gr; | |
128 | int r; | |
129 | ||
1d13f648 | 130 | group_path = prefix_roota(arg_root, "/etc/group"); |
1b992147 LP |
131 | f = fopen(group_path, "re"); |
132 | if (!f) | |
133 | return errno == ENOENT ? 0 : -errno; | |
134 | ||
d5099efc | 135 | r = hashmap_ensure_allocated(&database_group, &string_hash_ops); |
1b992147 LP |
136 | if (r < 0) |
137 | return r; | |
138 | ||
d5099efc | 139 | r = hashmap_ensure_allocated(&database_gid, NULL); |
1b992147 LP |
140 | if (r < 0) |
141 | return r; | |
142 | ||
143 | errno = 0; | |
144 | while ((gr = fgetgrent(f))) { | |
145 | char *n; | |
146 | int k, q; | |
147 | ||
148 | n = strdup(gr->gr_name); | |
149 | if (!n) | |
150 | return -ENOMEM; | |
151 | ||
152 | k = hashmap_put(database_group, n, GID_TO_PTR(gr->gr_gid)); | |
153 | if (k < 0 && k != -EEXIST) { | |
154 | free(n); | |
155 | return k; | |
156 | } | |
157 | ||
158 | q = hashmap_put(database_gid, GID_TO_PTR(gr->gr_gid), n); | |
159 | if (q < 0 && q != -EEXIST) { | |
43e948ee | 160 | if (k <= 0) |
1b992147 LP |
161 | free(n); |
162 | return q; | |
163 | } | |
164 | ||
340ac019 | 165 | if (k <= 0 && q <= 0) |
1b992147 LP |
166 | free(n); |
167 | ||
168 | errno = 0; | |
169 | } | |
170 | if (!IN_SET(errno, 0, ENOENT)) | |
171 | return -errno; | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
9f1c1940 ZJS |
176 | static int make_backup(const char *target, const char *x) { |
177 | _cleanup_close_ int src = -1; | |
178 | _cleanup_fclose_ FILE *dst = NULL; | |
0a12bb1e EV |
179 | _cleanup_free_ char *temp = NULL; |
180 | char *backup; | |
1b992147 LP |
181 | struct timespec ts[2]; |
182 | struct stat st; | |
183 | int r; | |
184 | ||
185 | src = open(x, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
186 | if (src < 0) { | |
187 | if (errno == ENOENT) /* No backup necessary... */ | |
188 | return 0; | |
189 | ||
190 | return -errno; | |
191 | } | |
192 | ||
193 | if (fstat(src, &st) < 0) | |
194 | return -errno; | |
195 | ||
9f1c1940 ZJS |
196 | r = fopen_temporary_label(target, x, &dst, &temp); |
197 | if (r < 0) | |
198 | return r; | |
1b992147 | 199 | |
1c876927 | 200 | r = copy_bytes(src, fileno(dst), (uint64_t) -1, COPY_REFLINK); |
1b992147 LP |
201 | if (r < 0) |
202 | goto fail; | |
203 | ||
9f1c1940 ZJS |
204 | /* Don't fail on chmod() or chown(). If it stays owned by us |
205 | * and/or unreadable by others, then it isn't too bad... */ | |
206 | ||
63c372cb | 207 | backup = strjoina(x, "-"); |
9f1c1940 | 208 | |
1b992147 | 209 | /* Copy over the access mask */ |
c039af23 YW |
210 | r = fchmod_and_chown(fileno(dst), st.st_mode & 07777, st.st_uid, st.st_gid); |
211 | if (r < 0) | |
212 | log_warning_errno(r, "Failed to change access mode or ownership of %s: %m", backup); | |
1b992147 LP |
213 | |
214 | ts[0] = st.st_atim; | |
215 | ts[1] = st.st_mtim; | |
f06863bd | 216 | if (futimens(fileno(dst), ts) < 0) |
56f64d95 | 217 | log_warning_errno(errno, "Failed to fix access and modification time of %s: %m", backup); |
1b992147 | 218 | |
0675e94a AJ |
219 | r = fflush_sync_and_check(dst); |
220 | if (r < 0) | |
221 | goto fail; | |
222 | ||
223 | if (rename(temp, backup) < 0) { | |
224 | r = -errno; | |
1b992147 | 225 | goto fail; |
0675e94a | 226 | } |
1b992147 LP |
227 | |
228 | return 0; | |
229 | ||
230 | fail: | |
231 | unlink(temp); | |
232 | return r; | |
233 | } | |
234 | ||
a12b0cc3 LP |
235 | static int putgrent_with_members(const struct group *gr, FILE *group) { |
236 | char **a; | |
237 | ||
238 | assert(gr); | |
239 | assert(group); | |
240 | ||
5bc9c980 | 241 | a = ordered_hashmap_get(members, gr->gr_name); |
a12b0cc3 LP |
242 | if (a) { |
243 | _cleanup_strv_free_ char **l = NULL; | |
244 | bool added = false; | |
245 | char **i; | |
246 | ||
247 | l = strv_copy(gr->gr_mem); | |
248 | if (!l) | |
249 | return -ENOMEM; | |
250 | ||
251 | STRV_FOREACH(i, a) { | |
252 | if (strv_find(l, *i)) | |
253 | continue; | |
254 | ||
255 | if (strv_extend(&l, *i) < 0) | |
256 | return -ENOMEM; | |
257 | ||
258 | added = true; | |
259 | } | |
260 | ||
261 | if (added) { | |
262 | struct group t; | |
100d5f6e | 263 | int r; |
a12b0cc3 LP |
264 | |
265 | strv_uniq(l); | |
266 | strv_sort(l); | |
267 | ||
268 | t = *gr; | |
269 | t.gr_mem = l; | |
270 | ||
100d5f6e FB |
271 | r = putgrent_sane(&t, group); |
272 | return r < 0 ? r : 1; | |
a12b0cc3 LP |
273 | } |
274 | } | |
275 | ||
100d5f6e | 276 | return putgrent_sane(gr, group); |
a12b0cc3 LP |
277 | } |
278 | ||
349cc4a5 | 279 | #if ENABLE_GSHADOW |
9ab315cc LP |
280 | static int putsgent_with_members(const struct sgrp *sg, FILE *gshadow) { |
281 | char **a; | |
282 | ||
283 | assert(sg); | |
284 | assert(gshadow); | |
285 | ||
5bc9c980 | 286 | a = ordered_hashmap_get(members, sg->sg_namp); |
9ab315cc LP |
287 | if (a) { |
288 | _cleanup_strv_free_ char **l = NULL; | |
289 | bool added = false; | |
290 | char **i; | |
291 | ||
292 | l = strv_copy(sg->sg_mem); | |
293 | if (!l) | |
294 | return -ENOMEM; | |
295 | ||
296 | STRV_FOREACH(i, a) { | |
297 | if (strv_find(l, *i)) | |
298 | continue; | |
299 | ||
300 | if (strv_extend(&l, *i) < 0) | |
301 | return -ENOMEM; | |
302 | ||
303 | added = true; | |
304 | } | |
305 | ||
306 | if (added) { | |
307 | struct sgrp t; | |
100d5f6e | 308 | int r; |
9ab315cc LP |
309 | |
310 | strv_uniq(l); | |
311 | strv_sort(l); | |
312 | ||
313 | t = *sg; | |
314 | t.sg_mem = l; | |
315 | ||
100d5f6e FB |
316 | r = putsgent_sane(&t, gshadow); |
317 | return r < 0 ? r : 1; | |
9ab315cc LP |
318 | } |
319 | } | |
320 | ||
100d5f6e | 321 | return putsgent_sane(sg, gshadow); |
9ab315cc | 322 | } |
b14e1b43 | 323 | #endif |
9ab315cc | 324 | |
fff19499 LP |
325 | static int sync_rights(FILE *from, FILE *to) { |
326 | struct stat st; | |
327 | ||
328 | if (fstat(fileno(from), &st) < 0) | |
329 | return -errno; | |
330 | ||
c039af23 | 331 | return fchmod_and_chown(fileno(to), st.st_mode & 07777, st.st_uid, st.st_gid); |
fff19499 LP |
332 | } |
333 | ||
c02e7b1e SW |
334 | static int rename_and_apply_smack(const char *temp_path, const char *dest_path) { |
335 | int r = 0; | |
336 | if (rename(temp_path, dest_path) < 0) | |
337 | return -errno; | |
338 | ||
339 | #ifdef SMACK_RUN_LABEL | |
340 | r = mac_smack_apply(dest_path, SMACK_ATTR_ACCESS, SMACK_FLOOR_LABEL); | |
341 | if (r < 0) | |
342 | return r; | |
343 | #endif | |
344 | return r; | |
345 | } | |
346 | ||
7b1aaf66 ZJS |
347 | static const char* default_shell(uid_t uid) { |
348 | return uid == 0 ? "/bin/sh" : "/sbin/nologin"; | |
349 | } | |
350 | ||
b20b0b66 FB |
351 | static int write_temporary_passwd(const char *passwd_path, FILE **tmpfile, char **tmpfile_path) { |
352 | _cleanup_fclose_ FILE *original = NULL, *passwd = NULL; | |
1dd98a71 | 353 | _cleanup_(unlink_and_freep) char *passwd_tmp = NULL; |
563dc6f8 | 354 | struct passwd *pw = NULL; |
1b992147 LP |
355 | Iterator iterator; |
356 | Item *i; | |
357 | int r; | |
358 | ||
5bc9c980 | 359 | if (ordered_hashmap_size(todo_uids) == 0) |
b20b0b66 | 360 | return 0; |
1b992147 | 361 | |
b20b0b66 FB |
362 | r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp); |
363 | if (r < 0) | |
364 | return r; | |
365 | ||
366 | original = fopen(passwd_path, "re"); | |
367 | if (original) { | |
b20b0b66 FB |
368 | |
369 | r = sync_rights(original, passwd); | |
1b992147 | 370 | if (r < 0) |
1dd98a71 | 371 | return r; |
1b992147 | 372 | |
100d5f6e | 373 | while ((r = fgetpwent_sane(original, &pw)) > 0) { |
1b992147 | 374 | |
5bc9c980 | 375 | i = ordered_hashmap_get(users, pw->pw_name); |
b20b0b66 FB |
376 | if (i && i->todo_user) { |
377 | log_error("%s: User \"%s\" already exists.", passwd_path, pw->pw_name); | |
1dd98a71 | 378 | return -EEXIST; |
b20b0b66 | 379 | } |
e3c72c21 | 380 | |
5bc9c980 | 381 | if (ordered_hashmap_contains(todo_uids, UID_TO_PTR(pw->pw_uid))) { |
b20b0b66 | 382 | log_error("%s: Detected collision for UID " UID_FMT ".", passwd_path, pw->pw_uid); |
1dd98a71 | 383 | return -EEXIST; |
1b992147 | 384 | } |
b20b0b66 | 385 | |
563dc6f8 FB |
386 | /* Make sure we keep the NIS entries (if any) at the end. */ |
387 | if (IN_SET(pw->pw_name[0], '+', '-')) | |
388 | break; | |
389 | ||
100d5f6e FB |
390 | r = putpwent_sane(pw, passwd); |
391 | if (r < 0) | |
392 | return r; | |
b20b0b66 | 393 | } |
100d5f6e FB |
394 | if (r < 0) |
395 | return r; | |
1dd98a71 FB |
396 | |
397 | } else { | |
398 | if (errno != ENOENT) | |
399 | return -errno; | |
400 | if (fchmod(fileno(passwd), 0644) < 0) | |
401 | return -errno; | |
b20b0b66 FB |
402 | } |
403 | ||
5bc9c980 | 404 | ORDERED_HASHMAP_FOREACH(i, todo_uids, iterator) { |
b20b0b66 FB |
405 | struct passwd n = { |
406 | .pw_name = i->name, | |
407 | .pw_uid = i->uid, | |
408 | .pw_gid = i->gid, | |
409 | .pw_gecos = i->description, | |
1b992147 | 410 | |
b20b0b66 FB |
411 | /* "x" means the password is stored in the shadow file */ |
412 | .pw_passwd = (char*) "x", | |
a12b0cc3 | 413 | |
b20b0b66 FB |
414 | /* We default to the root directory as home */ |
415 | .pw_dir = i->home ? i->home : (char*) "/", | |
1b992147 | 416 | |
b20b0b66 FB |
417 | /* Initialize the shell to nologin, with one exception: |
418 | * for root we patch in something special */ | |
7b1aaf66 | 419 | .pw_shell = i->shell ?: (char*) default_shell(i->uid), |
b20b0b66 | 420 | }; |
9ab315cc | 421 | |
100d5f6e FB |
422 | r = putpwent_sane(&n, passwd); |
423 | if (r < 0) | |
424 | return r; | |
b20b0b66 FB |
425 | } |
426 | ||
563dc6f8 FB |
427 | /* Append the remaining NIS entries if any */ |
428 | while (pw) { | |
100d5f6e FB |
429 | r = putpwent_sane(pw, passwd); |
430 | if (r < 0) | |
431 | return r; | |
563dc6f8 | 432 | |
100d5f6e FB |
433 | r = fgetpwent_sane(original, &pw); |
434 | if (r < 0) | |
435 | return r; | |
436 | if (r == 0) | |
437 | break; | |
563dc6f8 | 438 | } |
563dc6f8 | 439 | |
b20b0b66 FB |
440 | r = fflush_and_check(passwd); |
441 | if (r < 0) | |
1dd98a71 | 442 | return r; |
b20b0b66 | 443 | |
1cc6c93a YW |
444 | *tmpfile = TAKE_PTR(passwd); |
445 | *tmpfile_path = TAKE_PTR(passwd_tmp); | |
446 | ||
b20b0b66 | 447 | return 0; |
b20b0b66 FB |
448 | } |
449 | ||
450 | static int write_temporary_shadow(const char *shadow_path, FILE **tmpfile, char **tmpfile_path) { | |
451 | _cleanup_fclose_ FILE *original = NULL, *shadow = NULL; | |
1dd98a71 | 452 | _cleanup_(unlink_and_freep) char *shadow_tmp = NULL; |
19ec7de2 | 453 | struct spwd *sp = NULL; |
b20b0b66 FB |
454 | Iterator iterator; |
455 | long lstchg; | |
456 | Item *i; | |
457 | int r; | |
458 | ||
5bc9c980 | 459 | if (ordered_hashmap_size(todo_uids) == 0) |
b20b0b66 FB |
460 | return 0; |
461 | ||
462 | r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp); | |
463 | if (r < 0) | |
464 | return r; | |
9ab315cc | 465 | |
b20b0b66 FB |
466 | lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY); |
467 | ||
468 | original = fopen(shadow_path, "re"); | |
469 | if (original) { | |
b20b0b66 FB |
470 | |
471 | r = sync_rights(original, shadow); | |
9ab315cc | 472 | if (r < 0) |
1dd98a71 | 473 | return r; |
9ab315cc | 474 | |
100d5f6e | 475 | while ((r = fgetspent_sane(original, &sp)) > 0) { |
9ab315cc | 476 | |
5bc9c980 | 477 | i = ordered_hashmap_get(users, sp->sp_namp); |
b20b0b66 FB |
478 | if (i && i->todo_user) { |
479 | /* we will update the existing entry */ | |
480 | sp->sp_lstchg = lstchg; | |
e3c72c21 | 481 | |
b20b0b66 FB |
482 | /* only the /etc/shadow stage is left, so we can |
483 | * safely remove the item from the todo set */ | |
484 | i->todo_user = false; | |
5bc9c980 | 485 | ordered_hashmap_remove(todo_uids, UID_TO_PTR(i->uid)); |
9ab315cc | 486 | } |
b20b0b66 | 487 | |
19ec7de2 FB |
488 | /* Make sure we keep the NIS entries (if any) at the end. */ |
489 | if (IN_SET(sp->sp_namp[0], '+', '-')) | |
490 | break; | |
491 | ||
100d5f6e FB |
492 | r = putspent_sane(sp, shadow); |
493 | if (r < 0) | |
494 | return r; | |
b20b0b66 | 495 | } |
100d5f6e FB |
496 | if (r < 0) |
497 | return r; | |
1dd98a71 FB |
498 | |
499 | } else { | |
500 | if (errno != ENOENT) | |
501 | return -errno; | |
502 | if (fchmod(fileno(shadow), 0000) < 0) | |
503 | return -errno; | |
b20b0b66 | 504 | } |
9ab315cc | 505 | |
5bc9c980 | 506 | ORDERED_HASHMAP_FOREACH(i, todo_uids, iterator) { |
b20b0b66 FB |
507 | struct spwd n = { |
508 | .sp_namp = i->name, | |
509 | .sp_pwdp = (char*) "!!", | |
510 | .sp_lstchg = lstchg, | |
511 | .sp_min = -1, | |
512 | .sp_max = -1, | |
513 | .sp_warn = -1, | |
514 | .sp_inact = -1, | |
515 | .sp_expire = -1, | |
516 | .sp_flag = (unsigned long) -1, /* this appears to be what everybody does ... */ | |
517 | }; | |
9ab315cc | 518 | |
100d5f6e FB |
519 | r = putspent_sane(&n, shadow); |
520 | if (r < 0) | |
521 | return r; | |
1b992147 | 522 | } |
19ec7de2 FB |
523 | |
524 | /* Append the remaining NIS entries if any */ | |
525 | while (sp) { | |
100d5f6e FB |
526 | r = putspent_sane(sp, shadow); |
527 | if (r < 0) | |
528 | return r; | |
19ec7de2 | 529 | |
100d5f6e FB |
530 | r = fgetspent_sane(original, &sp); |
531 | if (r < 0) | |
532 | return r; | |
533 | if (r == 0) | |
534 | break; | |
19ec7de2 FB |
535 | } |
536 | if (!IN_SET(errno, 0, ENOENT)) | |
537 | return -errno; | |
1b992147 | 538 | |
0675e94a | 539 | r = fflush_sync_and_check(shadow); |
b20b0b66 | 540 | if (r < 0) |
1dd98a71 | 541 | return r; |
b20b0b66 | 542 | |
1cc6c93a YW |
543 | *tmpfile = TAKE_PTR(shadow); |
544 | *tmpfile_path = TAKE_PTR(shadow_tmp); | |
545 | ||
b20b0b66 | 546 | return 0; |
b20b0b66 | 547 | } |
1b992147 | 548 | |
b20b0b66 FB |
549 | static int write_temporary_group(const char *group_path, FILE **tmpfile, char **tmpfile_path) { |
550 | _cleanup_fclose_ FILE *original = NULL, *group = NULL; | |
1dd98a71 | 551 | _cleanup_(unlink_and_freep) char *group_tmp = NULL; |
b20b0b66 | 552 | bool group_changed = false; |
563dc6f8 | 553 | struct group *gr = NULL; |
b20b0b66 FB |
554 | Iterator iterator; |
555 | Item *i; | |
556 | int r; | |
1b992147 | 557 | |
5bc9c980 | 558 | if (ordered_hashmap_size(todo_gids) == 0 && ordered_hashmap_size(members) == 0) |
b20b0b66 | 559 | return 0; |
e3c72c21 | 560 | |
b20b0b66 FB |
561 | r = fopen_temporary_label("/etc/group", group_path, &group, &group_tmp); |
562 | if (r < 0) | |
563 | return r; | |
564 | ||
565 | original = fopen(group_path, "re"); | |
566 | if (original) { | |
b20b0b66 FB |
567 | |
568 | r = sync_rights(original, group); | |
569 | if (r < 0) | |
1dd98a71 | 570 | return r; |
b20b0b66 | 571 | |
100d5f6e | 572 | while ((r = fgetgrent_sane(original, &gr)) > 0) { |
b20b0b66 FB |
573 | /* Safety checks against name and GID collisions. Normally, |
574 | * this should be unnecessary, but given that we look at the | |
575 | * entries anyway here, let's make an extra verification | |
576 | * step that we don't generate duplicate entries. */ | |
577 | ||
5bc9c980 | 578 | i = ordered_hashmap_get(groups, gr->gr_name); |
b20b0b66 FB |
579 | if (i && i->todo_group) { |
580 | log_error("%s: Group \"%s\" already exists.", group_path, gr->gr_name); | |
1dd98a71 | 581 | return -EEXIST; |
1b992147 | 582 | } |
b20b0b66 | 583 | |
5bc9c980 | 584 | if (ordered_hashmap_contains(todo_gids, GID_TO_PTR(gr->gr_gid))) { |
b20b0b66 | 585 | log_error("%s: Detected collision for GID " GID_FMT ".", group_path, gr->gr_gid); |
1dd98a71 | 586 | return -EEXIST; |
1b992147 LP |
587 | } |
588 | ||
563dc6f8 FB |
589 | /* Make sure we keep the NIS entries (if any) at the end. */ |
590 | if (IN_SET(gr->gr_name[0], '+', '-')) | |
591 | break; | |
592 | ||
b20b0b66 FB |
593 | r = putgrent_with_members(gr, group); |
594 | if (r < 0) | |
1dd98a71 | 595 | return r; |
b20b0b66 FB |
596 | if (r > 0) |
597 | group_changed = true; | |
b20b0b66 | 598 | } |
100d5f6e FB |
599 | if (r < 0) |
600 | return r; | |
1dd98a71 FB |
601 | |
602 | } else { | |
603 | if (errno != ENOENT) | |
604 | return -errno; | |
605 | if (fchmod(fileno(group), 0644) < 0) | |
606 | return -errno; | |
b20b0b66 | 607 | } |
7629889c | 608 | |
5bc9c980 | 609 | ORDERED_HASHMAP_FOREACH(i, todo_gids, iterator) { |
b20b0b66 FB |
610 | struct group n = { |
611 | .gr_name = i->name, | |
612 | .gr_gid = i->gid, | |
613 | .gr_passwd = (char*) "x", | |
614 | }; | |
1b992147 | 615 | |
b20b0b66 FB |
616 | r = putgrent_with_members(&n, group); |
617 | if (r < 0) | |
1dd98a71 | 618 | return r; |
7629889c | 619 | |
b20b0b66 FB |
620 | group_changed = true; |
621 | } | |
1b992147 | 622 | |
563dc6f8 FB |
623 | /* Append the remaining NIS entries if any */ |
624 | while (gr) { | |
100d5f6e FB |
625 | r = putgrent_sane(gr, group); |
626 | if (r < 0) | |
627 | return r; | |
563dc6f8 | 628 | |
100d5f6e FB |
629 | r = fgetgrent_sane(original, &gr); |
630 | if (r < 0) | |
631 | return r; | |
632 | if (r == 0) | |
633 | break; | |
563dc6f8 | 634 | } |
563dc6f8 | 635 | |
0675e94a | 636 | r = fflush_sync_and_check(group); |
b20b0b66 | 637 | if (r < 0) |
1dd98a71 | 638 | return r; |
1b992147 | 639 | |
b20b0b66 | 640 | if (group_changed) { |
1cc6c93a YW |
641 | *tmpfile = TAKE_PTR(group); |
642 | *tmpfile_path = TAKE_PTR(group_tmp); | |
b20b0b66 FB |
643 | } |
644 | return 0; | |
b20b0b66 FB |
645 | } |
646 | ||
647 | static int write_temporary_gshadow(const char * gshadow_path, FILE **tmpfile, char **tmpfile_path) { | |
349cc4a5 | 648 | #if ENABLE_GSHADOW |
b20b0b66 | 649 | _cleanup_fclose_ FILE *original = NULL, *gshadow = NULL; |
1dd98a71 | 650 | _cleanup_(unlink_and_freep) char *gshadow_tmp = NULL; |
b20b0b66 FB |
651 | bool group_changed = false; |
652 | Iterator iterator; | |
653 | Item *i; | |
654 | int r; | |
655 | ||
5bc9c980 | 656 | if (ordered_hashmap_size(todo_gids) == 0 && ordered_hashmap_size(members) == 0) |
b20b0b66 FB |
657 | return 0; |
658 | ||
659 | r = fopen_temporary_label("/etc/gshadow", gshadow_path, &gshadow, &gshadow_tmp); | |
660 | if (r < 0) | |
661 | return r; | |
9ab315cc | 662 | |
b20b0b66 FB |
663 | original = fopen(gshadow_path, "re"); |
664 | if (original) { | |
665 | struct sgrp *sg; | |
666 | ||
667 | r = sync_rights(original, gshadow); | |
1b992147 | 668 | if (r < 0) |
1dd98a71 | 669 | return r; |
9ab315cc | 670 | |
100d5f6e | 671 | while ((r = fgetsgent_sane(original, &sg)) > 0) { |
c5abf225 | 672 | |
5bc9c980 | 673 | i = ordered_hashmap_get(groups, sg->sg_namp); |
b20b0b66 FB |
674 | if (i && i->todo_group) { |
675 | log_error("%s: Group \"%s\" already exists.", gshadow_path, sg->sg_namp); | |
1dd98a71 | 676 | return -EEXIST; |
b20b0b66 | 677 | } |
9ab315cc | 678 | |
b20b0b66 | 679 | r = putsgent_with_members(sg, gshadow); |
fff19499 | 680 | if (r < 0) |
1dd98a71 | 681 | return r; |
b20b0b66 FB |
682 | if (r > 0) |
683 | group_changed = true; | |
b20b0b66 | 684 | } |
100d5f6e FB |
685 | if (r < 0) |
686 | return r; | |
1dd98a71 FB |
687 | |
688 | } else { | |
689 | if (errno != ENOENT) | |
690 | return -errno; | |
691 | if (fchmod(fileno(gshadow), 0000) < 0) | |
692 | return -errno; | |
b20b0b66 | 693 | } |
9ab315cc | 694 | |
5bc9c980 | 695 | ORDERED_HASHMAP_FOREACH(i, todo_gids, iterator) { |
b20b0b66 FB |
696 | struct sgrp n = { |
697 | .sg_namp = i->name, | |
698 | .sg_passwd = (char*) "!!", | |
699 | }; | |
9ab315cc | 700 | |
b20b0b66 | 701 | r = putsgent_with_members(&n, gshadow); |
9ab315cc | 702 | if (r < 0) |
1dd98a71 | 703 | return r; |
b20b0b66 FB |
704 | |
705 | group_changed = true; | |
9ab315cc LP |
706 | } |
707 | ||
0675e94a | 708 | r = fflush_sync_and_check(gshadow); |
b20b0b66 | 709 | if (r < 0) |
1dd98a71 | 710 | return r; |
b20b0b66 | 711 | |
9ab315cc | 712 | if (group_changed) { |
1cc6c93a YW |
713 | *tmpfile = TAKE_PTR(gshadow); |
714 | *tmpfile_path = TAKE_PTR(gshadow_tmp); | |
b20b0b66 FB |
715 | } |
716 | return 0; | |
b14e1b43 FB |
717 | #else |
718 | return 0; | |
719 | #endif | |
b20b0b66 FB |
720 | } |
721 | ||
722 | static int write_files(void) { | |
b20b0b66 | 723 | _cleanup_fclose_ FILE *passwd = NULL, *group = NULL, *shadow = NULL, *gshadow = NULL; |
1dd98a71 | 724 | _cleanup_(unlink_and_freep) char *passwd_tmp = NULL, *group_tmp = NULL, *shadow_tmp = NULL, *gshadow_tmp = NULL; |
b20b0b66 FB |
725 | const char *passwd_path = NULL, *group_path = NULL, *shadow_path = NULL, *gshadow_path = NULL; |
726 | int r; | |
727 | ||
728 | passwd_path = prefix_roota(arg_root, "/etc/passwd"); | |
729 | shadow_path = prefix_roota(arg_root, "/etc/shadow"); | |
730 | group_path = prefix_roota(arg_root, "/etc/group"); | |
731 | gshadow_path = prefix_roota(arg_root, "/etc/gshadow"); | |
732 | ||
733 | r = write_temporary_group(group_path, &group, &group_tmp); | |
734 | if (r < 0) | |
1dd98a71 | 735 | return r; |
b20b0b66 FB |
736 | |
737 | r = write_temporary_gshadow(gshadow_path, &gshadow, &gshadow_tmp); | |
738 | if (r < 0) | |
1dd98a71 | 739 | return r; |
b20b0b66 FB |
740 | |
741 | r = write_temporary_passwd(passwd_path, &passwd, &passwd_tmp); | |
742 | if (r < 0) | |
1dd98a71 | 743 | return r; |
b20b0b66 FB |
744 | |
745 | r = write_temporary_shadow(shadow_path, &shadow, &shadow_tmp); | |
746 | if (r < 0) | |
1dd98a71 | 747 | return r; |
b20b0b66 FB |
748 | |
749 | /* Make a backup of the old files */ | |
750 | if (group) { | |
751 | r = make_backup("/etc/group", group_path); | |
752 | if (r < 0) | |
1dd98a71 | 753 | return r; |
b20b0b66 FB |
754 | } |
755 | if (gshadow) { | |
756 | r = make_backup("/etc/gshadow", gshadow_path); | |
757 | if (r < 0) | |
1dd98a71 | 758 | return r; |
1b992147 LP |
759 | } |
760 | ||
761 | if (passwd) { | |
9f1c1940 | 762 | r = make_backup("/etc/passwd", passwd_path); |
1b992147 | 763 | if (r < 0) |
1dd98a71 | 764 | return r; |
1b992147 | 765 | } |
9ab315cc LP |
766 | if (shadow) { |
767 | r = make_backup("/etc/shadow", shadow_path); | |
768 | if (r < 0) | |
1dd98a71 | 769 | return r; |
9ab315cc | 770 | } |
1b992147 LP |
771 | |
772 | /* And make the new files count */ | |
b20b0b66 FB |
773 | if (group) { |
774 | r = rename_and_apply_smack(group_tmp, group_path); | |
775 | if (r < 0) | |
1dd98a71 | 776 | return r; |
9ab315cc | 777 | |
b20b0b66 FB |
778 | group_tmp = mfree(group_tmp); |
779 | } | |
780 | if (gshadow) { | |
781 | r = rename_and_apply_smack(gshadow_tmp, gshadow_path); | |
782 | if (r < 0) | |
1dd98a71 | 783 | return r; |
1b992147 | 784 | |
b20b0b66 | 785 | gshadow_tmp = mfree(gshadow_tmp); |
1b992147 LP |
786 | } |
787 | ||
788 | if (passwd) { | |
c02e7b1e SW |
789 | r = rename_and_apply_smack(passwd_tmp, passwd_path); |
790 | if (r < 0) | |
1dd98a71 | 791 | return r; |
1b992147 | 792 | |
97b11eed | 793 | passwd_tmp = mfree(passwd_tmp); |
1b992147 | 794 | } |
9ab315cc | 795 | if (shadow) { |
c02e7b1e SW |
796 | r = rename_and_apply_smack(shadow_tmp, shadow_path); |
797 | if (r < 0) | |
1dd98a71 | 798 | return r; |
9ab315cc | 799 | |
97b11eed | 800 | shadow_tmp = mfree(shadow_tmp); |
9ab315cc | 801 | } |
1b992147 | 802 | |
1dd98a71 | 803 | return 0; |
1b992147 LP |
804 | } |
805 | ||
b9ee05c2 | 806 | static int uid_is_ok(uid_t uid, const char *name, bool check_with_gid) { |
1b992147 LP |
807 | struct passwd *p; |
808 | struct group *g; | |
809 | const char *n; | |
810 | Item *i; | |
811 | ||
812 | /* Let's see if we already have assigned the UID a second time */ | |
5bc9c980 | 813 | if (ordered_hashmap_get(todo_uids, UID_TO_PTR(uid))) |
1b992147 LP |
814 | return 0; |
815 | ||
816 | /* Try to avoid using uids that are already used by a group | |
817 | * that doesn't have the same name as our new user. */ | |
b9ee05c2 MV |
818 | if (check_with_gid) { |
819 | i = ordered_hashmap_get(todo_gids, GID_TO_PTR(uid)); | |
820 | if (i && !streq(i->name, name)) | |
821 | return 0; | |
822 | } | |
1b992147 LP |
823 | |
824 | /* Let's check the files directly */ | |
825 | if (hashmap_contains(database_uid, UID_TO_PTR(uid))) | |
826 | return 0; | |
827 | ||
b9ee05c2 MV |
828 | if (check_with_gid) { |
829 | n = hashmap_get(database_gid, GID_TO_PTR(uid)); | |
830 | if (n && !streq(n, name)) | |
831 | return 0; | |
832 | } | |
1b992147 LP |
833 | |
834 | /* Let's also check via NSS, to avoid UID clashes over LDAP and such, just in case */ | |
835 | if (!arg_root) { | |
836 | errno = 0; | |
837 | p = getpwuid(uid); | |
838 | if (p) | |
839 | return 0; | |
b0284aba | 840 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
841 | return -errno; |
842 | ||
b9ee05c2 MV |
843 | if (check_with_gid) { |
844 | errno = 0; | |
845 | g = getgrgid((gid_t) uid); | |
846 | if (g) { | |
847 | if (!streq(g->gr_name, name)) | |
848 | return 0; | |
849 | } else if (!IN_SET(errno, 0, ENOENT)) | |
850 | return -errno; | |
851 | } | |
1b992147 LP |
852 | } |
853 | ||
854 | return 1; | |
855 | } | |
856 | ||
857 | static int root_stat(const char *p, struct stat *st) { | |
858 | const char *fix; | |
859 | ||
1d13f648 | 860 | fix = prefix_roota(arg_root, p); |
1b992147 LP |
861 | if (stat(fix, st) < 0) |
862 | return -errno; | |
863 | ||
864 | return 0; | |
865 | } | |
866 | ||
867 | static int read_id_from_file(Item *i, uid_t *_uid, gid_t *_gid) { | |
868 | struct stat st; | |
869 | bool found_uid = false, found_gid = false; | |
56d21cde PDS |
870 | uid_t uid = 0; |
871 | gid_t gid = 0; | |
1b992147 LP |
872 | |
873 | assert(i); | |
874 | ||
875 | /* First, try to get the gid directly */ | |
876 | if (_gid && i->gid_path && root_stat(i->gid_path, &st) >= 0) { | |
877 | gid = st.st_gid; | |
878 | found_gid = true; | |
879 | } | |
880 | ||
881 | /* Then, try to get the uid directly */ | |
882 | if ((_uid || (_gid && !found_gid)) | |
883 | && i->uid_path | |
884 | && root_stat(i->uid_path, &st) >= 0) { | |
885 | ||
886 | uid = st.st_uid; | |
887 | found_uid = true; | |
888 | ||
889 | /* If we need the gid, but had no success yet, also derive it from the uid path */ | |
890 | if (_gid && !found_gid) { | |
891 | gid = st.st_gid; | |
892 | found_gid = true; | |
893 | } | |
894 | } | |
895 | ||
896 | /* If that didn't work yet, then let's reuse the gid as uid */ | |
897 | if (_uid && !found_uid && i->gid_path) { | |
898 | ||
899 | if (found_gid) { | |
900 | uid = (uid_t) gid; | |
901 | found_uid = true; | |
902 | } else if (root_stat(i->gid_path, &st) >= 0) { | |
903 | uid = (uid_t) st.st_gid; | |
904 | found_uid = true; | |
905 | } | |
906 | } | |
907 | ||
908 | if (_uid) { | |
909 | if (!found_uid) | |
910 | return 0; | |
911 | ||
912 | *_uid = uid; | |
913 | } | |
914 | ||
915 | if (_gid) { | |
916 | if (!found_gid) | |
917 | return 0; | |
918 | ||
919 | *_gid = gid; | |
920 | } | |
921 | ||
922 | return 1; | |
923 | } | |
924 | ||
925 | static int add_user(Item *i) { | |
926 | void *z; | |
927 | int r; | |
928 | ||
929 | assert(i); | |
930 | ||
931 | /* Check the database directly */ | |
932 | z = hashmap_get(database_user, i->name); | |
933 | if (z) { | |
934 | log_debug("User %s already exists.", i->name); | |
c1b6b04f | 935 | i->uid = PTR_TO_UID(z); |
1b992147 LP |
936 | i->uid_set = true; |
937 | return 0; | |
938 | } | |
939 | ||
940 | if (!arg_root) { | |
941 | struct passwd *p; | |
1b992147 LP |
942 | |
943 | /* Also check NSS */ | |
944 | errno = 0; | |
945 | p = getpwnam(i->name); | |
946 | if (p) { | |
947 | log_debug("User %s already exists.", i->name); | |
948 | i->uid = p->pw_uid; | |
949 | i->uid_set = true; | |
950 | ||
2fc09a9c DM |
951 | r = free_and_strdup(&i->description, p->pw_gecos); |
952 | if (r < 0) | |
953 | return log_oom(); | |
954 | ||
1b992147 LP |
955 | return 0; |
956 | } | |
4a62c710 MS |
957 | if (!IN_SET(errno, 0, ENOENT)) |
958 | return log_error_errno(errno, "Failed to check if user %s already exists: %m", i->name); | |
1b992147 LP |
959 | } |
960 | ||
961 | /* Try to use the suggested numeric uid */ | |
962 | if (i->uid_set) { | |
b9ee05c2 | 963 | r = uid_is_ok(i->uid, i->name, !i->id_set_strict); |
f647962d MS |
964 | if (r < 0) |
965 | return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid); | |
1b992147 LP |
966 | if (r == 0) { |
967 | log_debug("Suggested user ID " UID_FMT " for %s already used.", i->uid, i->name); | |
968 | i->uid_set = false; | |
969 | } | |
970 | } | |
971 | ||
972 | /* If that didn't work, try to read it from the specified path */ | |
973 | if (!i->uid_set) { | |
974 | uid_t c; | |
975 | ||
976 | if (read_id_from_file(i, &c, NULL) > 0) { | |
977 | ||
8530dc44 | 978 | if (c <= 0 || !uid_range_contains(uid_range, n_uid_range, c)) |
1b992147 LP |
979 | log_debug("User ID " UID_FMT " of file not suitable for %s.", c, i->name); |
980 | else { | |
b9ee05c2 | 981 | r = uid_is_ok(c, i->name, true); |
f647962d MS |
982 | if (r < 0) |
983 | return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid); | |
984 | else if (r > 0) { | |
1b992147 LP |
985 | i->uid = c; |
986 | i->uid_set = true; | |
987 | } else | |
988 | log_debug("User ID " UID_FMT " of file for %s is already used.", c, i->name); | |
989 | } | |
990 | } | |
991 | } | |
992 | ||
b938cb90 | 993 | /* Otherwise, try to reuse the group ID */ |
1b992147 | 994 | if (!i->uid_set && i->gid_set) { |
b9ee05c2 | 995 | r = uid_is_ok((uid_t) i->gid, i->name, true); |
f647962d MS |
996 | if (r < 0) |
997 | return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid); | |
1b992147 LP |
998 | if (r > 0) { |
999 | i->uid = (uid_t) i->gid; | |
1000 | i->uid_set = true; | |
1001 | } | |
1002 | } | |
1003 | ||
1004 | /* And if that didn't work either, let's try to find a free one */ | |
1005 | if (!i->uid_set) { | |
8530dc44 LP |
1006 | for (;;) { |
1007 | r = uid_range_next_lower(uid_range, n_uid_range, &search_uid); | |
1008 | if (r < 0) { | |
1009 | log_error("No free user ID available for %s.", i->name); | |
1010 | return r; | |
1011 | } | |
1b992147 | 1012 | |
b9ee05c2 | 1013 | r = uid_is_ok(search_uid, i->name, true); |
f647962d MS |
1014 | if (r < 0) |
1015 | return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid); | |
1016 | else if (r > 0) | |
1b992147 LP |
1017 | break; |
1018 | } | |
1019 | ||
1b992147 LP |
1020 | i->uid_set = true; |
1021 | i->uid = search_uid; | |
1b992147 LP |
1022 | } |
1023 | ||
5bc9c980 | 1024 | r = ordered_hashmap_ensure_allocated(&todo_uids, NULL); |
1b992147 LP |
1025 | if (r < 0) |
1026 | return log_oom(); | |
1027 | ||
5bc9c980 | 1028 | r = ordered_hashmap_put(todo_uids, UID_TO_PTR(i->uid), i); |
1b992147 LP |
1029 | if (r < 0) |
1030 | return log_oom(); | |
1031 | ||
c1b6b04f | 1032 | i->todo_user = true; |
1b992147 LP |
1033 | log_info("Creating user %s (%s) with uid " UID_FMT " and gid " GID_FMT ".", i->name, strna(i->description), i->uid, i->gid); |
1034 | ||
1035 | return 0; | |
1036 | } | |
1037 | ||
1038 | static int gid_is_ok(gid_t gid) { | |
1039 | struct group *g; | |
1040 | struct passwd *p; | |
1041 | ||
5bc9c980 | 1042 | if (ordered_hashmap_get(todo_gids, GID_TO_PTR(gid))) |
1b992147 LP |
1043 | return 0; |
1044 | ||
1045 | /* Avoid reusing gids that are already used by a different user */ | |
5bc9c980 | 1046 | if (ordered_hashmap_get(todo_uids, UID_TO_PTR(gid))) |
1b992147 LP |
1047 | return 0; |
1048 | ||
1049 | if (hashmap_contains(database_gid, GID_TO_PTR(gid))) | |
1050 | return 0; | |
1051 | ||
1052 | if (hashmap_contains(database_uid, UID_TO_PTR(gid))) | |
1053 | return 0; | |
1054 | ||
1055 | if (!arg_root) { | |
1056 | errno = 0; | |
1057 | g = getgrgid(gid); | |
1058 | if (g) | |
1059 | return 0; | |
b0284aba | 1060 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
1061 | return -errno; |
1062 | ||
1063 | errno = 0; | |
1064 | p = getpwuid((uid_t) gid); | |
1065 | if (p) | |
1066 | return 0; | |
b0284aba | 1067 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
1068 | return -errno; |
1069 | } | |
1070 | ||
1071 | return 1; | |
1072 | } | |
1073 | ||
1074 | static int add_group(Item *i) { | |
1075 | void *z; | |
1076 | int r; | |
1077 | ||
1078 | assert(i); | |
1079 | ||
1080 | /* Check the database directly */ | |
1081 | z = hashmap_get(database_group, i->name); | |
1082 | if (z) { | |
1083 | log_debug("Group %s already exists.", i->name); | |
1084 | i->gid = PTR_TO_GID(z); | |
1085 | i->gid_set = true; | |
1086 | return 0; | |
1087 | } | |
1088 | ||
1089 | /* Also check NSS */ | |
1090 | if (!arg_root) { | |
1091 | struct group *g; | |
1092 | ||
1093 | errno = 0; | |
1094 | g = getgrnam(i->name); | |
1095 | if (g) { | |
1096 | log_debug("Group %s already exists.", i->name); | |
1097 | i->gid = g->gr_gid; | |
1098 | i->gid_set = true; | |
1099 | return 0; | |
1100 | } | |
4a62c710 MS |
1101 | if (!IN_SET(errno, 0, ENOENT)) |
1102 | return log_error_errno(errno, "Failed to check if group %s already exists: %m", i->name); | |
1b992147 LP |
1103 | } |
1104 | ||
1105 | /* Try to use the suggested numeric gid */ | |
1106 | if (i->gid_set) { | |
1107 | r = gid_is_ok(i->gid); | |
f647962d MS |
1108 | if (r < 0) |
1109 | return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid); | |
b9ee05c2 | 1110 | if (i->id_set_strict) { |
28e7fad7 MV |
1111 | /* If we require the gid to already exist we can return here: |
1112 | * r > 0: means the gid does not exist -> fail | |
1113 | * r == 0: means the gid exists -> nothing more to do. | |
1114 | */ | |
1115 | if (r > 0) { | |
1116 | log_error("Failed to create %s: please create GID %d", i->name, i->gid); | |
1117 | return -EINVAL; | |
1118 | } | |
1119 | if (r == 0) | |
1120 | return 0; | |
1121 | } | |
1b992147 LP |
1122 | if (r == 0) { |
1123 | log_debug("Suggested group ID " GID_FMT " for %s already used.", i->gid, i->name); | |
1124 | i->gid_set = false; | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | /* Try to reuse the numeric uid, if there's one */ | |
1129 | if (!i->gid_set && i->uid_set) { | |
1130 | r = gid_is_ok((gid_t) i->uid); | |
f647962d MS |
1131 | if (r < 0) |
1132 | return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid); | |
1b992147 LP |
1133 | if (r > 0) { |
1134 | i->gid = (gid_t) i->uid; | |
1135 | i->gid_set = true; | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | /* If that didn't work, try to read it from the specified path */ | |
1140 | if (!i->gid_set) { | |
1141 | gid_t c; | |
1142 | ||
1143 | if (read_id_from_file(i, NULL, &c) > 0) { | |
1144 | ||
8530dc44 | 1145 | if (c <= 0 || !uid_range_contains(uid_range, n_uid_range, c)) |
1b992147 LP |
1146 | log_debug("Group ID " GID_FMT " of file not suitable for %s.", c, i->name); |
1147 | else { | |
1148 | r = gid_is_ok(c); | |
f647962d MS |
1149 | if (r < 0) |
1150 | return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid); | |
1151 | else if (r > 0) { | |
1b992147 LP |
1152 | i->gid = c; |
1153 | i->gid_set = true; | |
1154 | } else | |
1155 | log_debug("Group ID " GID_FMT " of file for %s already used.", c, i->name); | |
1156 | } | |
1157 | } | |
1158 | } | |
1159 | ||
1160 | /* And if that didn't work either, let's try to find a free one */ | |
1161 | if (!i->gid_set) { | |
8530dc44 LP |
1162 | for (;;) { |
1163 | /* We look for new GIDs in the UID pool! */ | |
1164 | r = uid_range_next_lower(uid_range, n_uid_range, &search_uid); | |
1165 | if (r < 0) { | |
1166 | log_error("No free group ID available for %s.", i->name); | |
1167 | return r; | |
1168 | } | |
1169 | ||
1170 | r = gid_is_ok(search_uid); | |
f647962d MS |
1171 | if (r < 0) |
1172 | return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid); | |
1173 | else if (r > 0) | |
1b992147 LP |
1174 | break; |
1175 | } | |
1176 | ||
1b992147 | 1177 | i->gid_set = true; |
8530dc44 | 1178 | i->gid = search_uid; |
1b992147 LP |
1179 | } |
1180 | ||
5bc9c980 | 1181 | r = ordered_hashmap_ensure_allocated(&todo_gids, NULL); |
1b992147 LP |
1182 | if (r < 0) |
1183 | return log_oom(); | |
1184 | ||
5bc9c980 | 1185 | r = ordered_hashmap_put(todo_gids, GID_TO_PTR(i->gid), i); |
1b992147 LP |
1186 | if (r < 0) |
1187 | return log_oom(); | |
1188 | ||
c1b6b04f | 1189 | i->todo_group = true; |
1b992147 LP |
1190 | log_info("Creating group %s with gid " GID_FMT ".", i->name, i->gid); |
1191 | ||
1192 | return 0; | |
1193 | } | |
1194 | ||
1195 | static int process_item(Item *i) { | |
1196 | int r; | |
1197 | ||
1198 | assert(i); | |
1199 | ||
1200 | switch (i->type) { | |
1201 | ||
b5327d0a YW |
1202 | case ADD_USER: { |
1203 | Item *j; | |
1204 | ||
1205 | j = ordered_hashmap_get(groups, i->name); | |
1206 | if (j && j->todo_group) { | |
1207 | /* When the group with the same name is already in queue, | |
1208 | * use the information about the group and do not create | |
1209 | * duplicated group entry. */ | |
1210 | i->gid_set = j->gid_set; | |
1211 | i->gid = j->gid; | |
1212 | i->id_set_strict = true; | |
1213 | } else { | |
1214 | r = add_group(i); | |
1215 | if (r < 0) | |
1216 | return r; | |
1217 | } | |
1b992147 LP |
1218 | |
1219 | return add_user(i); | |
b5327d0a | 1220 | } |
1b992147 | 1221 | |
e2c2060f | 1222 | case ADD_GROUP: |
1b992147 | 1223 | return add_group(i); |
1b992147 | 1224 | |
a12b0cc3 LP |
1225 | default: |
1226 | assert_not_reached("Unknown item type"); | |
1227 | } | |
1b992147 LP |
1228 | } |
1229 | ||
1230 | static void item_free(Item *i) { | |
1231 | ||
1232 | if (!i) | |
1233 | return; | |
1234 | ||
1235 | free(i->name); | |
1236 | free(i->uid_path); | |
1237 | free(i->gid_path); | |
1238 | free(i->description); | |
d9b8ea54 | 1239 | free(i->home); |
7b1aaf66 | 1240 | free(i->shell); |
1b992147 LP |
1241 | free(i); |
1242 | } | |
1243 | ||
1244 | DEFINE_TRIVIAL_CLEANUP_FUNC(Item*, item_free); | |
1245 | ||
a12b0cc3 LP |
1246 | static int add_implicit(void) { |
1247 | char *g, **l; | |
1248 | Iterator iterator; | |
1249 | int r; | |
1250 | ||
1251 | /* Implicitly create additional users and groups, if they were listed in "m" lines */ | |
5bc9c980 | 1252 | ORDERED_HASHMAP_FOREACH_KEY(l, g, members, iterator) { |
a12b0cc3 LP |
1253 | char **m; |
1254 | ||
d4f0412d YW |
1255 | STRV_FOREACH(m, l) |
1256 | if (!ordered_hashmap_get(users, *m)) { | |
a12b0cc3 LP |
1257 | _cleanup_(item_freep) Item *j = NULL; |
1258 | ||
5bc9c980 | 1259 | r = ordered_hashmap_ensure_allocated(&users, &string_hash_ops); |
a12b0cc3 LP |
1260 | if (r < 0) |
1261 | return log_oom(); | |
1262 | ||
1263 | j = new0(Item, 1); | |
1264 | if (!j) | |
1265 | return log_oom(); | |
1266 | ||
1267 | j->type = ADD_USER; | |
1268 | j->name = strdup(*m); | |
1269 | if (!j->name) | |
1270 | return log_oom(); | |
1271 | ||
5bc9c980 | 1272 | r = ordered_hashmap_put(users, j->name, j); |
a12b0cc3 LP |
1273 | if (r < 0) |
1274 | return log_oom(); | |
1275 | ||
1276 | log_debug("Adding implicit user '%s' due to m line", j->name); | |
1277 | j = NULL; | |
1278 | } | |
d4f0412d YW |
1279 | |
1280 | if (!(ordered_hashmap_get(users, g) || | |
1281 | ordered_hashmap_get(groups, g))) { | |
1282 | _cleanup_(item_freep) Item *j = NULL; | |
1283 | ||
1284 | r = ordered_hashmap_ensure_allocated(&groups, &string_hash_ops); | |
1285 | if (r < 0) | |
1286 | return log_oom(); | |
1287 | ||
1288 | j = new0(Item, 1); | |
1289 | if (!j) | |
1290 | return log_oom(); | |
1291 | ||
1292 | j->type = ADD_GROUP; | |
1293 | j->name = strdup(g); | |
1294 | if (!j->name) | |
1295 | return log_oom(); | |
1296 | ||
1297 | r = ordered_hashmap_put(groups, j->name, j); | |
1298 | if (r < 0) | |
1299 | return log_oom(); | |
1300 | ||
1301 | log_debug("Adding implicit group '%s' due to m line", j->name); | |
1302 | j = NULL; | |
a12b0cc3 LP |
1303 | } |
1304 | } | |
1305 | ||
1306 | return 0; | |
1307 | } | |
1308 | ||
1b992147 LP |
1309 | static bool item_equal(Item *a, Item *b) { |
1310 | assert(a); | |
1311 | assert(b); | |
1312 | ||
1313 | if (a->type != b->type) | |
1314 | return false; | |
1315 | ||
1316 | if (!streq_ptr(a->name, b->name)) | |
1317 | return false; | |
1318 | ||
1319 | if (!streq_ptr(a->uid_path, b->uid_path)) | |
1320 | return false; | |
1321 | ||
1322 | if (!streq_ptr(a->gid_path, b->gid_path)) | |
1323 | return false; | |
1324 | ||
1325 | if (!streq_ptr(a->description, b->description)) | |
1326 | return false; | |
1327 | ||
1328 | if (a->uid_set != b->uid_set) | |
1329 | return false; | |
1330 | ||
1331 | if (a->uid_set && a->uid != b->uid) | |
1332 | return false; | |
1333 | ||
1334 | if (a->gid_set != b->gid_set) | |
1335 | return false; | |
1336 | ||
1337 | if (a->gid_set && a->gid != b->gid) | |
1338 | return false; | |
1339 | ||
7629889c LP |
1340 | if (!streq_ptr(a->home, b->home)) |
1341 | return false; | |
1342 | ||
7b1aaf66 ZJS |
1343 | if (!streq_ptr(a->shell, b->shell)) |
1344 | return false; | |
1345 | ||
1b992147 LP |
1346 | return true; |
1347 | } | |
1348 | ||
1b992147 LP |
1349 | static int parse_line(const char *fname, unsigned line, const char *buffer) { |
1350 | ||
1351 | static const Specifier specifier_table[] = { | |
b294e594 LP |
1352 | { 'm', specifier_machine_id, NULL }, |
1353 | { 'b', specifier_boot_id, NULL }, | |
1354 | { 'H', specifier_host_name, NULL }, | |
1b992147 | 1355 | { 'v', specifier_kernel_release, NULL }, |
b294e594 LP |
1356 | { 'T', specifier_tmp_dir, NULL }, |
1357 | { 'V', specifier_var_tmp_dir, NULL }, | |
1b992147 LP |
1358 | {} |
1359 | }; | |
1360 | ||
7b1aaf66 ZJS |
1361 | _cleanup_free_ char *action = NULL, |
1362 | *name = NULL, *resolved_name = NULL, | |
1363 | *id = NULL, *resolved_id = NULL, | |
b8bed700 YW |
1364 | *description = NULL, *resolved_description = NULL, |
1365 | *home = NULL, *resolved_home = NULL, | |
7b1aaf66 | 1366 | *shell, *resolved_shell = NULL; |
1b992147 LP |
1367 | _cleanup_(item_freep) Item *i = NULL; |
1368 | Item *existing; | |
5bc9c980 | 1369 | OrderedHashmap *h; |
7629889c LP |
1370 | int r; |
1371 | const char *p; | |
1b992147 LP |
1372 | |
1373 | assert(fname); | |
1374 | assert(line >= 1); | |
1375 | assert(buffer); | |
1376 | ||
7629889c LP |
1377 | /* Parse columns */ |
1378 | p = buffer; | |
7b1aaf66 ZJS |
1379 | r = extract_many_words(&p, NULL, EXTRACT_QUOTES, |
1380 | &action, &name, &id, &description, &home, &shell, NULL); | |
7629889c | 1381 | if (r < 0) { |
1b992147 | 1382 | log_error("[%s:%u] Syntax error.", fname, line); |
7629889c LP |
1383 | return r; |
1384 | } | |
1385 | if (r < 2) { | |
1386 | log_error("[%s:%u] Missing action and name columns.", fname, line); | |
1387 | return -EINVAL; | |
1388 | } | |
4b1c1753 | 1389 | if (!isempty(p)) { |
7629889c LP |
1390 | log_error("[%s:%u] Trailing garbage.", fname, line); |
1391 | return -EINVAL; | |
1b992147 LP |
1392 | } |
1393 | ||
7629889c | 1394 | /* Verify action */ |
1b992147 LP |
1395 | if (strlen(action) != 1) { |
1396 | log_error("[%s:%u] Unknown modifier '%s'", fname, line, action); | |
1397 | return -EINVAL; | |
1398 | } | |
1399 | ||
8530dc44 | 1400 | if (!IN_SET(action[0], ADD_USER, ADD_GROUP, ADD_MEMBER, ADD_RANGE)) { |
61233823 | 1401 | log_error("[%s:%u] Unknown command type '%c'.", fname, line, action[0]); |
1b992147 LP |
1402 | return -EBADMSG; |
1403 | } | |
1404 | ||
7629889c | 1405 | /* Verify name */ |
97b11eed DH |
1406 | if (isempty(name) || streq(name, "-")) |
1407 | name = mfree(name); | |
1b992147 | 1408 | |
8530dc44 LP |
1409 | if (name) { |
1410 | r = specifier_printf(name, specifier_table, NULL, &resolved_name); | |
1411 | if (r < 0) { | |
1412 | log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, name); | |
1413 | return r; | |
1414 | } | |
1415 | ||
1416 | if (!valid_user_group_name(resolved_name)) { | |
1417 | log_error("[%s:%u] '%s' is not a valid user or group name.", fname, line, resolved_name); | |
1418 | return -EINVAL; | |
1419 | } | |
1b992147 LP |
1420 | } |
1421 | ||
8530dc44 | 1422 | /* Verify id */ |
97b11eed DH |
1423 | if (isempty(id) || streq(id, "-")) |
1424 | id = mfree(id); | |
7629889c | 1425 | |
8530dc44 LP |
1426 | if (id) { |
1427 | r = specifier_printf(id, specifier_table, NULL, &resolved_id); | |
1428 | if (r < 0) { | |
1429 | log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, name); | |
1430 | return r; | |
1431 | } | |
1432 | } | |
1433 | ||
1434 | /* Verify description */ | |
97b11eed DH |
1435 | if (isempty(description) || streq(description, "-")) |
1436 | description = mfree(description); | |
1b992147 | 1437 | |
8530dc44 | 1438 | if (description) { |
b8bed700 YW |
1439 | r = specifier_printf(description, specifier_table, NULL, &resolved_description); |
1440 | if (r < 0) { | |
1441 | log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, description); | |
1442 | return r; | |
1443 | } | |
1444 | ||
1445 | if (!valid_gecos(resolved_description)) { | |
1446 | log_error("[%s:%u] '%s' is not a valid GECOS field.", fname, line, resolved_description); | |
8530dc44 LP |
1447 | return -EINVAL; |
1448 | } | |
1449 | } | |
1450 | ||
1451 | /* Verify home */ | |
97b11eed DH |
1452 | if (isempty(home) || streq(home, "-")) |
1453 | home = mfree(home); | |
1b992147 | 1454 | |
8530dc44 | 1455 | if (home) { |
b8bed700 YW |
1456 | r = specifier_printf(home, specifier_table, NULL, &resolved_home); |
1457 | if (r < 0) { | |
1458 | log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, home); | |
1459 | return r; | |
1460 | } | |
1461 | ||
1462 | if (!valid_home(resolved_home)) { | |
1463 | log_error("[%s:%u] '%s' is not a valid home directory field.", fname, line, resolved_home); | |
8530dc44 LP |
1464 | return -EINVAL; |
1465 | } | |
1466 | } | |
1467 | ||
7b1aaf66 ZJS |
1468 | /* Verify shell */ |
1469 | if (isempty(shell) || streq(shell, "-")) | |
1470 | shell = mfree(shell); | |
1471 | ||
1472 | if (shell) { | |
1473 | r = specifier_printf(shell, specifier_table, NULL, &resolved_shell); | |
1474 | if (r < 0) { | |
1475 | log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, shell); | |
1476 | return r; | |
1477 | } | |
1478 | ||
1479 | if (!valid_shell(resolved_shell)) { | |
1480 | log_error("[%s:%u] '%s' is not a valid login shell field.", fname, line, resolved_shell); | |
1481 | return -EINVAL; | |
1482 | } | |
1483 | } | |
1484 | ||
a12b0cc3 | 1485 | switch (action[0]) { |
1b992147 | 1486 | |
8530dc44 LP |
1487 | case ADD_RANGE: |
1488 | if (resolved_name) { | |
1489 | log_error("[%s:%u] Lines of type 'r' don't take a name field.", fname, line); | |
1490 | return -EINVAL; | |
1491 | } | |
1b992147 | 1492 | |
8530dc44 LP |
1493 | if (!resolved_id) { |
1494 | log_error("[%s:%u] Lines of type 'r' require a ID range in the third field.", fname, line); | |
1495 | return -EINVAL; | |
1496 | } | |
1b992147 | 1497 | |
7b1aaf66 ZJS |
1498 | if (description || home || shell) { |
1499 | log_error("[%s:%u] Lines of type '%c' don't take a %s field.", | |
1500 | fname, line, action[0], | |
1501 | description ? "GECOS" : home ? "home directory" : "login shell"); | |
7629889c LP |
1502 | return -EINVAL; |
1503 | } | |
1504 | ||
8530dc44 LP |
1505 | r = uid_range_add_str(&uid_range, &n_uid_range, resolved_id); |
1506 | if (r < 0) { | |
1507 | log_error("[%s:%u] Invalid UID range %s.", fname, line, resolved_id); | |
a12b0cc3 LP |
1508 | return -EINVAL; |
1509 | } | |
1b992147 | 1510 | |
8530dc44 LP |
1511 | return 0; |
1512 | ||
1513 | case ADD_MEMBER: { | |
1514 | char **l; | |
1515 | ||
1516 | /* Try to extend an existing member or group item */ | |
1517 | if (!name) { | |
1518 | log_error("[%s:%u] Lines of type 'm' require a user name in the second field.", fname, line); | |
1519 | return -EINVAL; | |
1520 | } | |
1521 | ||
1522 | if (!resolved_id) { | |
1523 | log_error("[%s:%u] Lines of type 'm' require a group name in the third field.", fname, line); | |
1524 | return -EINVAL; | |
a12b0cc3 | 1525 | } |
1b992147 | 1526 | |
a12b0cc3 LP |
1527 | if (!valid_user_group_name(resolved_id)) { |
1528 | log_error("[%s:%u] '%s' is not a valid user or group name.", fname, line, resolved_id); | |
1529 | return -EINVAL; | |
1530 | } | |
1b992147 | 1531 | |
7b1aaf66 ZJS |
1532 | if (description || home || shell) { |
1533 | log_error("[%s:%u] Lines of type '%c' don't take a %s field.", | |
1534 | fname, line, action[0], | |
1535 | description ? "GECOS" : home ? "home directory" : "login shell"); | |
8530dc44 LP |
1536 | return -EINVAL; |
1537 | } | |
1538 | ||
5bc9c980 | 1539 | r = ordered_hashmap_ensure_allocated(&members, &string_hash_ops); |
7629889c LP |
1540 | if (r < 0) |
1541 | return log_oom(); | |
a12b0cc3 | 1542 | |
5bc9c980 | 1543 | l = ordered_hashmap_get(members, resolved_id); |
a12b0cc3 LP |
1544 | if (l) { |
1545 | /* A list for this group name already exists, let's append to it */ | |
1546 | r = strv_push(&l, resolved_name); | |
1547 | if (r < 0) | |
1548 | return log_oom(); | |
1549 | ||
1550 | resolved_name = NULL; | |
1551 | ||
5bc9c980 | 1552 | assert_se(ordered_hashmap_update(members, resolved_id, l) >= 0); |
1b992147 | 1553 | } else { |
a12b0cc3 LP |
1554 | /* No list for this group name exists yet, create one */ |
1555 | ||
1556 | l = new0(char *, 2); | |
1557 | if (!l) | |
1558 | return -ENOMEM; | |
1559 | ||
1560 | l[0] = resolved_name; | |
1561 | l[1] = NULL; | |
1b992147 | 1562 | |
5bc9c980 | 1563 | r = ordered_hashmap_put(members, resolved_id, l); |
1b992147 | 1564 | if (r < 0) { |
a12b0cc3 LP |
1565 | free(l); |
1566 | return log_oom(); | |
1b992147 LP |
1567 | } |
1568 | ||
a12b0cc3 | 1569 | resolved_id = resolved_name = NULL; |
1b992147 | 1570 | } |
a12b0cc3 LP |
1571 | |
1572 | return 0; | |
1b992147 LP |
1573 | } |
1574 | ||
a12b0cc3 | 1575 | case ADD_USER: |
8530dc44 LP |
1576 | if (!name) { |
1577 | log_error("[%s:%u] Lines of type 'u' require a user name in the second field.", fname, line); | |
1578 | return -EINVAL; | |
1579 | } | |
1580 | ||
5bc9c980 | 1581 | r = ordered_hashmap_ensure_allocated(&users, &string_hash_ops); |
a12b0cc3 LP |
1582 | if (r < 0) |
1583 | return log_oom(); | |
1584 | ||
1585 | i = new0(Item, 1); | |
1586 | if (!i) | |
1587 | return log_oom(); | |
1588 | ||
8530dc44 LP |
1589 | if (resolved_id) { |
1590 | if (path_is_absolute(resolved_id)) { | |
1cc6c93a | 1591 | i->uid_path = TAKE_PTR(resolved_id); |
858d36c1 | 1592 | path_simplify(i->uid_path, false); |
a12b0cc3 | 1593 | } else { |
4cb41413 MV |
1594 | _cleanup_free_ char *uid = NULL, *gid = NULL; |
1595 | if (split_pair(resolved_id, ":", &uid, &gid) == 0) { | |
1596 | r = parse_gid(gid, &i->gid); | |
1597 | if (r < 0) | |
1598 | return log_error_errno(r, "Failed to parse GID: '%s': %m", id); | |
1599 | i->gid_set = true; | |
b9ee05c2 | 1600 | i->id_set_strict = true; |
4cb41413 | 1601 | free_and_replace(resolved_id, uid); |
a12b0cc3 | 1602 | } |
1825c909 MV |
1603 | if (!streq(resolved_id, "-")) { |
1604 | r = parse_uid(resolved_id, &i->uid); | |
1605 | if (r < 0) | |
1606 | return log_error_errno(r, "Failed to parse UID: '%s': %m", id); | |
1607 | i->uid_set = true; | |
1608 | } | |
a12b0cc3 LP |
1609 | } |
1610 | } | |
1611 | ||
b8bed700 YW |
1612 | i->description = TAKE_PTR(resolved_description); |
1613 | i->home = TAKE_PTR(resolved_home); | |
1cc6c93a | 1614 | i->shell = TAKE_PTR(resolved_shell); |
7b1aaf66 | 1615 | |
1b992147 | 1616 | h = users; |
a12b0cc3 LP |
1617 | break; |
1618 | ||
1619 | case ADD_GROUP: | |
8530dc44 LP |
1620 | if (!name) { |
1621 | log_error("[%s:%u] Lines of type 'g' require a user name in the second field.", fname, line); | |
1622 | return -EINVAL; | |
1623 | } | |
a12b0cc3 | 1624 | |
7b1aaf66 ZJS |
1625 | if (description || home || shell) { |
1626 | log_error("[%s:%u] Lines of type '%c' don't take a %s field.", | |
1627 | fname, line, action[0], | |
1628 | description ? "GECOS" : home ? "home directory" : "login shell"); | |
7629889c LP |
1629 | return -EINVAL; |
1630 | } | |
1631 | ||
5bc9c980 | 1632 | r = ordered_hashmap_ensure_allocated(&groups, &string_hash_ops); |
7629889c LP |
1633 | if (r < 0) |
1634 | return log_oom(); | |
1635 | ||
a12b0cc3 LP |
1636 | i = new0(Item, 1); |
1637 | if (!i) | |
1638 | return log_oom(); | |
1639 | ||
8530dc44 LP |
1640 | if (resolved_id) { |
1641 | if (path_is_absolute(resolved_id)) { | |
1cc6c93a | 1642 | i->gid_path = TAKE_PTR(resolved_id); |
858d36c1 | 1643 | path_simplify(i->gid_path, false); |
a12b0cc3 | 1644 | } else { |
8530dc44 | 1645 | r = parse_gid(resolved_id, &i->gid); |
4cb41413 MV |
1646 | if (r < 0) |
1647 | return log_error_errno(r, "Failed to parse GID: '%s': %m", id); | |
a12b0cc3 LP |
1648 | |
1649 | i->gid_set = true; | |
1650 | } | |
1651 | } | |
1652 | ||
1b992147 | 1653 | h = groups; |
a12b0cc3 | 1654 | break; |
8530dc44 | 1655 | |
bce415ed RC |
1656 | default: |
1657 | return -EBADMSG; | |
1b992147 | 1658 | } |
a12b0cc3 LP |
1659 | |
1660 | i->type = action[0]; | |
1cc6c93a | 1661 | i->name = TAKE_PTR(resolved_name); |
1b992147 | 1662 | |
5bc9c980 | 1663 | existing = ordered_hashmap_get(h, i->name); |
1b992147 LP |
1664 | if (existing) { |
1665 | ||
1666 | /* Two identical items are fine */ | |
1667 | if (!item_equal(existing, i)) | |
1668 | log_warning("Two or more conflicting lines for %s configured, ignoring.", i->name); | |
1669 | ||
1670 | return 0; | |
1671 | } | |
1672 | ||
5bc9c980 | 1673 | r = ordered_hashmap_put(h, i->name, i); |
a12b0cc3 LP |
1674 | if (r < 0) |
1675 | return log_oom(); | |
1b992147 LP |
1676 | |
1677 | i = NULL; | |
1678 | return 0; | |
1679 | } | |
1680 | ||
1681 | static int read_config_file(const char *fn, bool ignore_enoent) { | |
dfc87cbf LP |
1682 | _cleanup_fclose_ FILE *rf = NULL; |
1683 | FILE *f = NULL; | |
1b992147 | 1684 | unsigned v = 0; |
c4640902 | 1685 | int r = 0; |
1b992147 LP |
1686 | |
1687 | assert(fn); | |
1688 | ||
dfc87cbf LP |
1689 | if (streq(fn, "-")) |
1690 | f = stdin; | |
1691 | else { | |
a826d4f7 | 1692 | r = search_and_fopen(fn, "re", arg_root, (const char**) CONF_PATHS_STRV("sysusers.d"), &rf); |
dfc87cbf LP |
1693 | if (r < 0) { |
1694 | if (ignore_enoent && r == -ENOENT) | |
1695 | return 0; | |
1b992147 | 1696 | |
8d3d7072 | 1697 | return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn); |
dfc87cbf LP |
1698 | } |
1699 | ||
1700 | f = rf; | |
1b992147 LP |
1701 | } |
1702 | ||
050ca299 LP |
1703 | for (;;) { |
1704 | _cleanup_free_ char *line = NULL; | |
1b992147 LP |
1705 | char *l; |
1706 | int k; | |
1707 | ||
050ca299 LP |
1708 | k = read_line(f, LONG_LINE_MAX, &line); |
1709 | if (k < 0) | |
1710 | return log_error_errno(k, "Failed to read '%s': %m", fn); | |
1711 | if (k == 0) | |
1712 | break; | |
1713 | ||
1b992147 LP |
1714 | v++; |
1715 | ||
1716 | l = strstrip(line); | |
4c701096 | 1717 | if (IN_SET(*l, 0, '#')) |
1b992147 LP |
1718 | continue; |
1719 | ||
1720 | k = parse_line(fn, v, l); | |
1721 | if (k < 0 && r == 0) | |
1722 | r = k; | |
1723 | } | |
1724 | ||
1725 | if (ferror(f)) { | |
56f64d95 | 1726 | log_error_errno(errno, "Failed to read from file %s: %m", fn); |
1b992147 LP |
1727 | if (r == 0) |
1728 | r = -EIO; | |
1729 | } | |
1730 | ||
1731 | return r; | |
1732 | } | |
1733 | ||
1b992147 LP |
1734 | static void free_database(Hashmap *by_name, Hashmap *by_id) { |
1735 | char *name; | |
1736 | ||
1737 | for (;;) { | |
1738 | name = hashmap_first(by_id); | |
1739 | if (!name) | |
1740 | break; | |
1741 | ||
1742 | hashmap_remove(by_name, name); | |
1743 | ||
1744 | hashmap_steal_first_key(by_id); | |
1745 | free(name); | |
1746 | } | |
1747 | ||
1748 | while ((name = hashmap_steal_first_key(by_name))) | |
1749 | free(name); | |
1750 | ||
1751 | hashmap_free(by_name); | |
1752 | hashmap_free(by_id); | |
1753 | } | |
1754 | ||
ec0327d6 ZJS |
1755 | static int cat_config(void) { |
1756 | _cleanup_strv_free_ char **files = NULL; | |
ec0327d6 ZJS |
1757 | int r; |
1758 | ||
a826d4f7 | 1759 | r = conf_files_list_with_replacement(arg_root, CONF_PATHS_STRV("sysusers.d"), arg_replace, &files, NULL); |
ec0327d6 ZJS |
1760 | if (r < 0) |
1761 | return r; | |
1762 | ||
0221d68a | 1763 | (void) pager_open(arg_pager_flags); |
dcd5c891 | 1764 | |
ec0327d6 ZJS |
1765 | return cat_files(NULL, files, 0); |
1766 | } | |
1767 | ||
37ec0fdd LP |
1768 | static int help(void) { |
1769 | _cleanup_free_ char *link = NULL; | |
1770 | int r; | |
1771 | ||
1772 | r = terminal_urlify_man("systemd-sysusers.service", "8", &link); | |
1773 | if (r < 0) | |
1774 | return log_oom(); | |
1775 | ||
1b992147 LP |
1776 | printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" |
1777 | "Creates system user accounts.\n\n" | |
1778 | " -h --help Show this help\n" | |
1779 | " --version Show package version\n" | |
ec0327d6 | 1780 | " --cat-config Show configuration files\n" |
601185b4 | 1781 | " --root=PATH Operate on an alternate filesystem root\n" |
d16a1c1b | 1782 | " --replace=PATH Treat arguments as replacement for PATH\n" |
1b600bd5 | 1783 | " --inline Treat arguments as configuration lines\n" |
dcd5c891 | 1784 | " --no-pager Do not pipe output into a pager\n" |
37ec0fdd LP |
1785 | "\nSee the %s for details.\n" |
1786 | , program_invocation_short_name | |
1787 | , link | |
1788 | ); | |
1789 | ||
1790 | return 0; | |
1b992147 LP |
1791 | } |
1792 | ||
1793 | static int parse_argv(int argc, char *argv[]) { | |
1794 | ||
1795 | enum { | |
1796 | ARG_VERSION = 0x100, | |
ec0327d6 | 1797 | ARG_CAT_CONFIG, |
1b992147 | 1798 | ARG_ROOT, |
d16a1c1b | 1799 | ARG_REPLACE, |
1b600bd5 | 1800 | ARG_INLINE, |
dcd5c891 | 1801 | ARG_NO_PAGER, |
1b992147 LP |
1802 | }; |
1803 | ||
1804 | static const struct option options[] = { | |
ec0327d6 ZJS |
1805 | { "help", no_argument, NULL, 'h' }, |
1806 | { "version", no_argument, NULL, ARG_VERSION }, | |
1807 | { "cat-config", no_argument, NULL, ARG_CAT_CONFIG }, | |
1808 | { "root", required_argument, NULL, ARG_ROOT }, | |
1809 | { "replace", required_argument, NULL, ARG_REPLACE }, | |
1810 | { "inline", no_argument, NULL, ARG_INLINE }, | |
dcd5c891 | 1811 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, |
1b992147 LP |
1812 | {} |
1813 | }; | |
1814 | ||
0f474365 | 1815 | int c, r; |
1b992147 LP |
1816 | |
1817 | assert(argc >= 0); | |
1818 | assert(argv); | |
1819 | ||
601185b4 | 1820 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) |
1b992147 LP |
1821 | |
1822 | switch (c) { | |
1823 | ||
1824 | case 'h': | |
37ec0fdd | 1825 | return help(); |
1b992147 LP |
1826 | |
1827 | case ARG_VERSION: | |
3f6fd1ba | 1828 | return version(); |
1b992147 | 1829 | |
ec0327d6 ZJS |
1830 | case ARG_CAT_CONFIG: |
1831 | arg_cat_config = true; | |
1832 | break; | |
1833 | ||
1b992147 | 1834 | case ARG_ROOT: |
0f03c2a4 | 1835 | r = parse_path_argument_and_warn(optarg, true, &arg_root); |
0f474365 | 1836 | if (r < 0) |
0f03c2a4 | 1837 | return r; |
1b992147 LP |
1838 | break; |
1839 | ||
d16a1c1b ZJS |
1840 | case ARG_REPLACE: |
1841 | if (!path_is_absolute(optarg) || | |
1842 | !endswith(optarg, ".conf")) { | |
1843 | log_error("The argument to --replace= must an absolute path to a config file"); | |
1844 | return -EINVAL; | |
1845 | } | |
1846 | ||
1847 | arg_replace = optarg; | |
1848 | break; | |
1849 | ||
1b600bd5 ZJS |
1850 | case ARG_INLINE: |
1851 | arg_inline = true; | |
1852 | break; | |
1853 | ||
dcd5c891 | 1854 | case ARG_NO_PAGER: |
0221d68a | 1855 | arg_pager_flags |= PAGER_DISABLE; |
dcd5c891 LP |
1856 | break; |
1857 | ||
1b992147 LP |
1858 | case '?': |
1859 | return -EINVAL; | |
1860 | ||
1861 | default: | |
1862 | assert_not_reached("Unhandled option"); | |
1863 | } | |
1b992147 | 1864 | |
ec0327d6 ZJS |
1865 | if (arg_replace && arg_cat_config) { |
1866 | log_error("Option --replace= is not supported with --cat-config"); | |
1867 | return -EINVAL; | |
1868 | } | |
1869 | ||
d16a1c1b ZJS |
1870 | if (arg_replace && optind >= argc) { |
1871 | log_error("When --replace= is given, some configuration items must be specified"); | |
1872 | return -EINVAL; | |
1873 | } | |
1874 | ||
1b992147 LP |
1875 | return 1; |
1876 | } | |
1877 | ||
d16a1c1b ZJS |
1878 | static int parse_arguments(char **args) { |
1879 | char **arg; | |
1880 | unsigned pos = 1; | |
1881 | int r; | |
1882 | ||
1883 | STRV_FOREACH(arg, args) { | |
1884 | if (arg_inline) | |
1885 | /* Use (argument):n, where n==1 for the first positional arg */ | |
1886 | r = parse_line("(argument)", pos, *arg); | |
1887 | else | |
1888 | r = read_config_file(*arg, false); | |
1889 | if (r < 0) | |
1890 | return r; | |
1891 | ||
1892 | pos++; | |
1893 | } | |
1894 | ||
1895 | return 0; | |
1896 | } | |
1897 | ||
ec0327d6 | 1898 | static int read_config_files(char **args) { |
d16a1c1b ZJS |
1899 | _cleanup_strv_free_ char **files = NULL; |
1900 | _cleanup_free_ char *p = NULL; | |
1901 | char **f; | |
1902 | int r; | |
1903 | ||
a826d4f7 | 1904 | r = conf_files_list_with_replacement(arg_root, CONF_PATHS_STRV("sysusers.d"), arg_replace, &files, &p); |
d16a1c1b | 1905 | if (r < 0) |
ec0327d6 | 1906 | return r; |
d16a1c1b ZJS |
1907 | |
1908 | STRV_FOREACH(f, files) | |
1909 | if (p && path_equal(*f, p)) { | |
1910 | log_debug("Parsing arguments at position \"%s\"…", *f); | |
1911 | ||
1912 | r = parse_arguments(args); | |
1913 | if (r < 0) | |
1914 | return r; | |
1915 | } else { | |
1916 | log_debug("Reading config file \"%s\"…", *f); | |
1917 | ||
1918 | /* Just warn, ignore result otherwise */ | |
1919 | (void) read_config_file(*f, true); | |
1920 | } | |
1921 | ||
1922 | return 0; | |
1923 | } | |
1924 | ||
1b992147 | 1925 | int main(int argc, char *argv[]) { |
1b992147 LP |
1926 | _cleanup_close_ int lock = -1; |
1927 | Iterator iterator; | |
d16a1c1b | 1928 | int r; |
1b992147 | 1929 | Item *i; |
a12b0cc3 | 1930 | char *n; |
1b992147 LP |
1931 | |
1932 | r = parse_argv(argc, argv); | |
1933 | if (r <= 0) | |
1934 | goto finish; | |
1935 | ||
6bf3c61c | 1936 | log_setup_service(); |
1b992147 | 1937 | |
ec0327d6 ZJS |
1938 | if (arg_cat_config) { |
1939 | r = cat_config(); | |
1940 | goto finish; | |
1941 | } | |
1942 | ||
1b992147 LP |
1943 | umask(0022); |
1944 | ||
c3dacc8b | 1945 | r = mac_selinux_init(); |
9f1c1940 | 1946 | if (r < 0) { |
da927ba9 | 1947 | log_error_errno(r, "SELinux setup failed: %m"); |
9f1c1940 ZJS |
1948 | goto finish; |
1949 | } | |
1b992147 | 1950 | |
d16a1c1b ZJS |
1951 | /* If command line arguments are specified along with --replace, read all |
1952 | * configuration files and insert the positional arguments at the specified | |
1953 | * place. Otherwise, if command line arguments are specified, execute just | |
1954 | * them, and finally, without --replace= or any positional arguments, just | |
1955 | * read configuration and execute it. | |
1956 | */ | |
1957 | if (arg_replace || optind >= argc) | |
ec0327d6 | 1958 | r = read_config_files(argv + optind); |
d16a1c1b ZJS |
1959 | else |
1960 | r = parse_arguments(argv + optind); | |
1961 | if (r < 0) | |
1962 | goto finish; | |
1b992147 | 1963 | |
fe102d6a LP |
1964 | /* Let's tell nss-systemd not to synthesize the "root" and "nobody" entries for it, so that our detection |
1965 | * whether the names or UID/GID area already used otherwise doesn't get confused. After all, even though | |
1966 | * nss-systemd synthesizes these users/groups, they should still appear in /etc/passwd and /etc/group, as the | |
1967 | * synthesizing logic is merely supposed to be fallback for cases where we run with a completely unpopulated | |
1968 | * /etc. */ | |
1969 | if (setenv("SYSTEMD_NSS_BYPASS_SYNTHETIC", "1", 1) < 0) { | |
1970 | r = log_error_errno(errno, "Failed to set SYSTEMD_NSS_BYPASS_SYNTHETIC environment variable: %m"); | |
1971 | goto finish; | |
1972 | } | |
1973 | ||
8530dc44 | 1974 | if (!uid_range) { |
b9ee05c2 | 1975 | /* Default to default range of 1..SYSTEM_UID_MAX */ |
8530dc44 LP |
1976 | r = uid_range_add(&uid_range, &n_uid_range, 1, SYSTEM_UID_MAX); |
1977 | if (r < 0) { | |
1978 | log_oom(); | |
1979 | goto finish; | |
1980 | } | |
1981 | } | |
1982 | ||
a12b0cc3 LP |
1983 | r = add_implicit(); |
1984 | if (r < 0) | |
1985 | goto finish; | |
1986 | ||
e929bee0 | 1987 | lock = take_etc_passwd_lock(arg_root); |
1b992147 | 1988 | if (lock < 0) { |
d1e4b8fd | 1989 | log_error_errno(lock, "Failed to take /etc/passwd lock: %m"); |
1b992147 LP |
1990 | goto finish; |
1991 | } | |
1992 | ||
1993 | r = load_user_database(); | |
1994 | if (r < 0) { | |
da927ba9 | 1995 | log_error_errno(r, "Failed to load user database: %m"); |
1b992147 LP |
1996 | goto finish; |
1997 | } | |
1998 | ||
1999 | r = load_group_database(); | |
2000 | if (r < 0) { | |
da927ba9 | 2001 | log_error_errno(r, "Failed to read group database: %m"); |
1b992147 LP |
2002 | goto finish; |
2003 | } | |
2004 | ||
5bc9c980 | 2005 | ORDERED_HASHMAP_FOREACH(i, groups, iterator) |
c1a32819 | 2006 | (void) process_item(i); |
1b992147 | 2007 | |
5bc9c980 | 2008 | ORDERED_HASHMAP_FOREACH(i, users, iterator) |
c1a32819 | 2009 | (void) process_item(i); |
1b992147 LP |
2010 | |
2011 | r = write_files(); | |
2012 | if (r < 0) | |
da927ba9 | 2013 | log_error_errno(r, "Failed to write files: %m"); |
1b992147 LP |
2014 | |
2015 | finish: | |
dcd5c891 LP |
2016 | pager_close(); |
2017 | ||
5bc9c980 MV |
2018 | ordered_hashmap_free_with_destructor(groups, item_free); |
2019 | ordered_hashmap_free_with_destructor(users, item_free); | |
1b992147 | 2020 | |
5bc9c980 MV |
2021 | while ((n = ordered_hashmap_first_key(members))) { |
2022 | strv_free(ordered_hashmap_steal_first(members)); | |
a12b0cc3 LP |
2023 | free(n); |
2024 | } | |
5bc9c980 | 2025 | ordered_hashmap_free(members); |
224b0e7a | 2026 | |
5bc9c980 MV |
2027 | ordered_hashmap_free(todo_uids); |
2028 | ordered_hashmap_free(todo_gids); | |
1b992147 LP |
2029 | |
2030 | free_database(database_user, database_uid); | |
2031 | free_database(database_group, database_gid); | |
2032 | ||
d9bcc5a6 LP |
2033 | free(uid_range); |
2034 | ||
1b992147 LP |
2035 | free(arg_root); |
2036 | ||
2037 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
2038 | } |