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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
1b992147 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2014 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
3f6fd1ba | 21 | #include <getopt.h> |
1b992147 | 22 | #include <grp.h> |
9ab315cc | 23 | #include <gshadow.h> |
3f6fd1ba LP |
24 | #include <pwd.h> |
25 | #include <shadow.h> | |
932ad62b | 26 | #include <utmp.h> |
1b992147 | 27 | |
b5efdb8a | 28 | #include "alloc-util.h" |
1b992147 LP |
29 | #include "conf-files.h" |
30 | #include "copy.h" | |
a0f29c76 LP |
31 | #include "def.h" |
32 | #include "fd-util.h" | |
1dd98a71 | 33 | #include "fs-util.h" |
f7f628b5 | 34 | #include "fileio-label.h" |
f97b34a6 | 35 | #include "format-util.h" |
3f6fd1ba LP |
36 | #include "hashmap.h" |
37 | #include "path-util.h" | |
38 | #include "selinux-util.h" | |
07630cea | 39 | #include "smack-util.h" |
3f6fd1ba | 40 | #include "specifier.h" |
07630cea | 41 | #include "string-util.h" |
3f6fd1ba LP |
42 | #include "strv.h" |
43 | #include "uid-range.h" | |
a0f29c76 | 44 | #include "user-util.h" |
3f6fd1ba LP |
45 | #include "utf8.h" |
46 | #include "util.h" | |
1b992147 LP |
47 | |
48 | typedef enum ItemType { | |
49 | ADD_USER = 'u', | |
50 | ADD_GROUP = 'g', | |
a12b0cc3 | 51 | ADD_MEMBER = 'm', |
8530dc44 | 52 | ADD_RANGE = 'r', |
1b992147 LP |
53 | } ItemType; |
54 | typedef struct Item { | |
55 | ItemType type; | |
56 | ||
57 | char *name; | |
58 | char *uid_path; | |
59 | char *gid_path; | |
60 | char *description; | |
7629889c | 61 | char *home; |
7b1aaf66 | 62 | char *shell; |
1b992147 LP |
63 | |
64 | gid_t gid; | |
65 | uid_t uid; | |
66 | ||
67 | bool gid_set:1; | |
b9ee05c2 MV |
68 | // id_set_strict means that the group with the specified gid must |
69 | // exist and that the check if a uid clashes with a gid is skipped | |
70 | bool id_set_strict:1; | |
1b992147 LP |
71 | bool uid_set:1; |
72 | ||
c1b6b04f KS |
73 | bool todo_user:1; |
74 | bool todo_group:1; | |
1b992147 LP |
75 | } Item; |
76 | ||
77 | static char *arg_root = NULL; | |
d16a1c1b | 78 | static const char *arg_replace = NULL; |
1b600bd5 | 79 | static bool arg_inline = false; |
1b992147 | 80 | |
75eb6154 | 81 | static const char conf_file_dirs[] = CONF_PATHS_NULSTR("sysusers.d"); |
1b992147 | 82 | |
5bc9c980 MV |
83 | static OrderedHashmap *users = NULL, *groups = NULL; |
84 | static OrderedHashmap *todo_uids = NULL, *todo_gids = NULL; | |
85 | static OrderedHashmap *members = NULL; | |
1b992147 LP |
86 | |
87 | static Hashmap *database_uid = NULL, *database_user = NULL; | |
88 | static Hashmap *database_gid = NULL, *database_group = NULL; | |
89 | ||
fed1e721 | 90 | static uid_t search_uid = UID_INVALID; |
8530dc44 LP |
91 | static UidRange *uid_range = NULL; |
92 | static unsigned n_uid_range = 0; | |
1b992147 | 93 | |
1b992147 LP |
94 | static int load_user_database(void) { |
95 | _cleanup_fclose_ FILE *f = NULL; | |
96 | const char *passwd_path; | |
97 | struct passwd *pw; | |
98 | int r; | |
99 | ||
1d13f648 | 100 | passwd_path = prefix_roota(arg_root, "/etc/passwd"); |
1b992147 LP |
101 | f = fopen(passwd_path, "re"); |
102 | if (!f) | |
103 | return errno == ENOENT ? 0 : -errno; | |
104 | ||
d5099efc | 105 | r = hashmap_ensure_allocated(&database_user, &string_hash_ops); |
1b992147 LP |
106 | if (r < 0) |
107 | return r; | |
108 | ||
d5099efc | 109 | r = hashmap_ensure_allocated(&database_uid, NULL); |
1b992147 LP |
110 | if (r < 0) |
111 | return r; | |
112 | ||
113 | errno = 0; | |
114 | while ((pw = fgetpwent(f))) { | |
115 | char *n; | |
116 | int k, q; | |
117 | ||
118 | n = strdup(pw->pw_name); | |
119 | if (!n) | |
120 | return -ENOMEM; | |
121 | ||
122 | k = hashmap_put(database_user, n, UID_TO_PTR(pw->pw_uid)); | |
123 | if (k < 0 && k != -EEXIST) { | |
124 | free(n); | |
125 | return k; | |
126 | } | |
127 | ||
128 | q = hashmap_put(database_uid, UID_TO_PTR(pw->pw_uid), n); | |
129 | if (q < 0 && q != -EEXIST) { | |
130 | if (k < 0) | |
131 | free(n); | |
132 | return q; | |
133 | } | |
134 | ||
135 | if (q < 0 && k < 0) | |
136 | free(n); | |
137 | ||
138 | errno = 0; | |
139 | } | |
140 | if (!IN_SET(errno, 0, ENOENT)) | |
141 | return -errno; | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
146 | static int load_group_database(void) { | |
147 | _cleanup_fclose_ FILE *f = NULL; | |
148 | const char *group_path; | |
149 | struct group *gr; | |
150 | int r; | |
151 | ||
1d13f648 | 152 | group_path = prefix_roota(arg_root, "/etc/group"); |
1b992147 LP |
153 | f = fopen(group_path, "re"); |
154 | if (!f) | |
155 | return errno == ENOENT ? 0 : -errno; | |
156 | ||
d5099efc | 157 | r = hashmap_ensure_allocated(&database_group, &string_hash_ops); |
1b992147 LP |
158 | if (r < 0) |
159 | return r; | |
160 | ||
d5099efc | 161 | r = hashmap_ensure_allocated(&database_gid, NULL); |
1b992147 LP |
162 | if (r < 0) |
163 | return r; | |
164 | ||
165 | errno = 0; | |
166 | while ((gr = fgetgrent(f))) { | |
167 | char *n; | |
168 | int k, q; | |
169 | ||
170 | n = strdup(gr->gr_name); | |
171 | if (!n) | |
172 | return -ENOMEM; | |
173 | ||
174 | k = hashmap_put(database_group, n, GID_TO_PTR(gr->gr_gid)); | |
175 | if (k < 0 && k != -EEXIST) { | |
176 | free(n); | |
177 | return k; | |
178 | } | |
179 | ||
180 | q = hashmap_put(database_gid, GID_TO_PTR(gr->gr_gid), n); | |
181 | if (q < 0 && q != -EEXIST) { | |
182 | if (k < 0) | |
183 | free(n); | |
184 | return q; | |
185 | } | |
186 | ||
187 | if (q < 0 && k < 0) | |
188 | free(n); | |
189 | ||
190 | errno = 0; | |
191 | } | |
192 | if (!IN_SET(errno, 0, ENOENT)) | |
193 | return -errno; | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
9f1c1940 ZJS |
198 | static int make_backup(const char *target, const char *x) { |
199 | _cleanup_close_ int src = -1; | |
200 | _cleanup_fclose_ FILE *dst = NULL; | |
0a12bb1e EV |
201 | _cleanup_free_ char *temp = NULL; |
202 | char *backup; | |
1b992147 LP |
203 | struct timespec ts[2]; |
204 | struct stat st; | |
205 | int r; | |
206 | ||
207 | src = open(x, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
208 | if (src < 0) { | |
209 | if (errno == ENOENT) /* No backup necessary... */ | |
210 | return 0; | |
211 | ||
212 | return -errno; | |
213 | } | |
214 | ||
215 | if (fstat(src, &st) < 0) | |
216 | return -errno; | |
217 | ||
9f1c1940 ZJS |
218 | r = fopen_temporary_label(target, x, &dst, &temp); |
219 | if (r < 0) | |
220 | return r; | |
1b992147 | 221 | |
1c876927 | 222 | r = copy_bytes(src, fileno(dst), (uint64_t) -1, COPY_REFLINK); |
1b992147 LP |
223 | if (r < 0) |
224 | goto fail; | |
225 | ||
9f1c1940 ZJS |
226 | /* Don't fail on chmod() or chown(). If it stays owned by us |
227 | * and/or unreadable by others, then it isn't too bad... */ | |
228 | ||
63c372cb | 229 | backup = strjoina(x, "-"); |
9f1c1940 | 230 | |
1b992147 | 231 | /* Copy over the access mask */ |
9f1c1940 | 232 | if (fchmod(fileno(dst), st.st_mode & 07777) < 0) |
56f64d95 | 233 | log_warning_errno(errno, "Failed to change mode on %s: %m", backup); |
1b992147 | 234 | |
9f1c1940 | 235 | if (fchown(fileno(dst), st.st_uid, st.st_gid)< 0) |
56f64d95 | 236 | log_warning_errno(errno, "Failed to change ownership of %s: %m", backup); |
1b992147 LP |
237 | |
238 | ts[0] = st.st_atim; | |
239 | ts[1] = st.st_mtim; | |
f06863bd | 240 | if (futimens(fileno(dst), ts) < 0) |
56f64d95 | 241 | log_warning_errno(errno, "Failed to fix access and modification time of %s: %m", backup); |
1b992147 | 242 | |
0675e94a AJ |
243 | r = fflush_sync_and_check(dst); |
244 | if (r < 0) | |
245 | goto fail; | |
246 | ||
247 | if (rename(temp, backup) < 0) { | |
248 | r = -errno; | |
1b992147 | 249 | goto fail; |
0675e94a | 250 | } |
1b992147 LP |
251 | |
252 | return 0; | |
253 | ||
254 | fail: | |
255 | unlink(temp); | |
256 | return r; | |
257 | } | |
258 | ||
a12b0cc3 LP |
259 | static int putgrent_with_members(const struct group *gr, FILE *group) { |
260 | char **a; | |
261 | ||
262 | assert(gr); | |
263 | assert(group); | |
264 | ||
5bc9c980 | 265 | a = ordered_hashmap_get(members, gr->gr_name); |
a12b0cc3 LP |
266 | if (a) { |
267 | _cleanup_strv_free_ char **l = NULL; | |
268 | bool added = false; | |
269 | char **i; | |
270 | ||
271 | l = strv_copy(gr->gr_mem); | |
272 | if (!l) | |
273 | return -ENOMEM; | |
274 | ||
275 | STRV_FOREACH(i, a) { | |
276 | if (strv_find(l, *i)) | |
277 | continue; | |
278 | ||
279 | if (strv_extend(&l, *i) < 0) | |
280 | return -ENOMEM; | |
281 | ||
282 | added = true; | |
283 | } | |
284 | ||
285 | if (added) { | |
286 | struct group t; | |
287 | ||
288 | strv_uniq(l); | |
289 | strv_sort(l); | |
290 | ||
291 | t = *gr; | |
292 | t.gr_mem = l; | |
293 | ||
294 | errno = 0; | |
295 | if (putgrent(&t, group) != 0) | |
f5e5c28f | 296 | return errno > 0 ? -errno : -EIO; |
a12b0cc3 LP |
297 | |
298 | return 1; | |
299 | } | |
300 | } | |
301 | ||
302 | errno = 0; | |
303 | if (putgrent(gr, group) != 0) | |
f5e5c28f | 304 | return errno > 0 ? -errno : -EIO; |
a12b0cc3 LP |
305 | |
306 | return 0; | |
307 | } | |
308 | ||
349cc4a5 | 309 | #if ENABLE_GSHADOW |
9ab315cc LP |
310 | static int putsgent_with_members(const struct sgrp *sg, FILE *gshadow) { |
311 | char **a; | |
312 | ||
313 | assert(sg); | |
314 | assert(gshadow); | |
315 | ||
5bc9c980 | 316 | a = ordered_hashmap_get(members, sg->sg_namp); |
9ab315cc LP |
317 | if (a) { |
318 | _cleanup_strv_free_ char **l = NULL; | |
319 | bool added = false; | |
320 | char **i; | |
321 | ||
322 | l = strv_copy(sg->sg_mem); | |
323 | if (!l) | |
324 | return -ENOMEM; | |
325 | ||
326 | STRV_FOREACH(i, a) { | |
327 | if (strv_find(l, *i)) | |
328 | continue; | |
329 | ||
330 | if (strv_extend(&l, *i) < 0) | |
331 | return -ENOMEM; | |
332 | ||
333 | added = true; | |
334 | } | |
335 | ||
336 | if (added) { | |
337 | struct sgrp t; | |
338 | ||
339 | strv_uniq(l); | |
340 | strv_sort(l); | |
341 | ||
342 | t = *sg; | |
343 | t.sg_mem = l; | |
344 | ||
345 | errno = 0; | |
346 | if (putsgent(&t, gshadow) != 0) | |
f5e5c28f | 347 | return errno > 0 ? -errno : -EIO; |
9ab315cc LP |
348 | |
349 | return 1; | |
350 | } | |
351 | } | |
352 | ||
353 | errno = 0; | |
354 | if (putsgent(sg, gshadow) != 0) | |
f5e5c28f | 355 | return errno > 0 ? -errno : -EIO; |
9ab315cc LP |
356 | |
357 | return 0; | |
358 | } | |
b14e1b43 | 359 | #endif |
9ab315cc | 360 | |
fff19499 LP |
361 | static int sync_rights(FILE *from, FILE *to) { |
362 | struct stat st; | |
363 | ||
364 | if (fstat(fileno(from), &st) < 0) | |
365 | return -errno; | |
366 | ||
367 | if (fchmod(fileno(to), st.st_mode & 07777) < 0) | |
368 | return -errno; | |
369 | ||
370 | if (fchown(fileno(to), st.st_uid, st.st_gid) < 0) | |
371 | return -errno; | |
372 | ||
373 | return 0; | |
374 | } | |
375 | ||
c02e7b1e SW |
376 | static int rename_and_apply_smack(const char *temp_path, const char *dest_path) { |
377 | int r = 0; | |
378 | if (rename(temp_path, dest_path) < 0) | |
379 | return -errno; | |
380 | ||
381 | #ifdef SMACK_RUN_LABEL | |
382 | r = mac_smack_apply(dest_path, SMACK_ATTR_ACCESS, SMACK_FLOOR_LABEL); | |
383 | if (r < 0) | |
384 | return r; | |
385 | #endif | |
386 | return r; | |
387 | } | |
388 | ||
7b1aaf66 ZJS |
389 | static const char* default_shell(uid_t uid) { |
390 | return uid == 0 ? "/bin/sh" : "/sbin/nologin"; | |
391 | } | |
392 | ||
b20b0b66 FB |
393 | static int write_temporary_passwd(const char *passwd_path, FILE **tmpfile, char **tmpfile_path) { |
394 | _cleanup_fclose_ FILE *original = NULL, *passwd = NULL; | |
1dd98a71 | 395 | _cleanup_(unlink_and_freep) char *passwd_tmp = NULL; |
1b992147 LP |
396 | Iterator iterator; |
397 | Item *i; | |
398 | int r; | |
399 | ||
5bc9c980 | 400 | if (ordered_hashmap_size(todo_uids) == 0) |
b20b0b66 | 401 | return 0; |
1b992147 | 402 | |
b20b0b66 FB |
403 | r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp); |
404 | if (r < 0) | |
405 | return r; | |
406 | ||
407 | original = fopen(passwd_path, "re"); | |
408 | if (original) { | |
409 | struct passwd *pw; | |
410 | ||
411 | r = sync_rights(original, passwd); | |
1b992147 | 412 | if (r < 0) |
1dd98a71 | 413 | return r; |
1b992147 | 414 | |
b20b0b66 FB |
415 | errno = 0; |
416 | while ((pw = fgetpwent(original))) { | |
1b992147 | 417 | |
5bc9c980 | 418 | i = ordered_hashmap_get(users, pw->pw_name); |
b20b0b66 FB |
419 | if (i && i->todo_user) { |
420 | log_error("%s: User \"%s\" already exists.", passwd_path, pw->pw_name); | |
1dd98a71 | 421 | return -EEXIST; |
b20b0b66 | 422 | } |
e3c72c21 | 423 | |
5bc9c980 | 424 | if (ordered_hashmap_contains(todo_uids, UID_TO_PTR(pw->pw_uid))) { |
b20b0b66 | 425 | log_error("%s: Detected collision for UID " UID_FMT ".", passwd_path, pw->pw_uid); |
1dd98a71 | 426 | return -EEXIST; |
1b992147 | 427 | } |
b20b0b66 FB |
428 | |
429 | errno = 0; | |
1dd98a71 FB |
430 | if (putpwent(pw, passwd) < 0) |
431 | return errno ? -errno : -EIO; | |
1b992147 | 432 | |
b20b0b66 FB |
433 | errno = 0; |
434 | } | |
1dd98a71 FB |
435 | if (!IN_SET(errno, 0, ENOENT)) |
436 | return -errno; | |
437 | ||
438 | } else { | |
439 | if (errno != ENOENT) | |
440 | return -errno; | |
441 | if (fchmod(fileno(passwd), 0644) < 0) | |
442 | return -errno; | |
b20b0b66 FB |
443 | } |
444 | ||
5bc9c980 | 445 | ORDERED_HASHMAP_FOREACH(i, todo_uids, iterator) { |
b20b0b66 FB |
446 | struct passwd n = { |
447 | .pw_name = i->name, | |
448 | .pw_uid = i->uid, | |
449 | .pw_gid = i->gid, | |
450 | .pw_gecos = i->description, | |
1b992147 | 451 | |
b20b0b66 FB |
452 | /* "x" means the password is stored in the shadow file */ |
453 | .pw_passwd = (char*) "x", | |
a12b0cc3 | 454 | |
b20b0b66 FB |
455 | /* We default to the root directory as home */ |
456 | .pw_dir = i->home ? i->home : (char*) "/", | |
1b992147 | 457 | |
b20b0b66 FB |
458 | /* Initialize the shell to nologin, with one exception: |
459 | * for root we patch in something special */ | |
7b1aaf66 | 460 | .pw_shell = i->shell ?: (char*) default_shell(i->uid), |
b20b0b66 | 461 | }; |
9ab315cc | 462 | |
b20b0b66 | 463 | errno = 0; |
1dd98a71 FB |
464 | if (putpwent(&n, passwd) != 0) |
465 | return errno ? -errno : -EIO; | |
b20b0b66 FB |
466 | } |
467 | ||
468 | r = fflush_and_check(passwd); | |
469 | if (r < 0) | |
1dd98a71 | 470 | return r; |
b20b0b66 FB |
471 | |
472 | *tmpfile = passwd; | |
473 | *tmpfile_path = passwd_tmp; | |
474 | passwd = NULL; | |
475 | passwd_tmp = NULL; | |
476 | return 0; | |
b20b0b66 FB |
477 | } |
478 | ||
479 | static int write_temporary_shadow(const char *shadow_path, FILE **tmpfile, char **tmpfile_path) { | |
480 | _cleanup_fclose_ FILE *original = NULL, *shadow = NULL; | |
1dd98a71 | 481 | _cleanup_(unlink_and_freep) char *shadow_tmp = NULL; |
b20b0b66 FB |
482 | Iterator iterator; |
483 | long lstchg; | |
484 | Item *i; | |
485 | int r; | |
486 | ||
5bc9c980 | 487 | if (ordered_hashmap_size(todo_uids) == 0) |
b20b0b66 FB |
488 | return 0; |
489 | ||
490 | r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp); | |
491 | if (r < 0) | |
492 | return r; | |
9ab315cc | 493 | |
b20b0b66 FB |
494 | lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY); |
495 | ||
496 | original = fopen(shadow_path, "re"); | |
497 | if (original) { | |
498 | struct spwd *sp; | |
499 | ||
500 | r = sync_rights(original, shadow); | |
9ab315cc | 501 | if (r < 0) |
1dd98a71 | 502 | return r; |
9ab315cc | 503 | |
b20b0b66 FB |
504 | errno = 0; |
505 | while ((sp = fgetspent(original))) { | |
9ab315cc | 506 | |
5bc9c980 | 507 | i = ordered_hashmap_get(users, sp->sp_namp); |
b20b0b66 FB |
508 | if (i && i->todo_user) { |
509 | /* we will update the existing entry */ | |
510 | sp->sp_lstchg = lstchg; | |
e3c72c21 | 511 | |
b20b0b66 FB |
512 | /* only the /etc/shadow stage is left, so we can |
513 | * safely remove the item from the todo set */ | |
514 | i->todo_user = false; | |
5bc9c980 | 515 | ordered_hashmap_remove(todo_uids, UID_TO_PTR(i->uid)); |
9ab315cc | 516 | } |
b20b0b66 FB |
517 | |
518 | errno = 0; | |
1dd98a71 FB |
519 | if (putspent(sp, shadow) < 0) |
520 | return errno ? -errno : -EIO; | |
9ab315cc | 521 | |
b20b0b66 FB |
522 | errno = 0; |
523 | } | |
1dd98a71 FB |
524 | if (!IN_SET(errno, 0, ENOENT)) |
525 | return -errno; | |
526 | ||
527 | } else { | |
528 | if (errno != ENOENT) | |
529 | return -errno; | |
530 | if (fchmod(fileno(shadow), 0000) < 0) | |
531 | return -errno; | |
b20b0b66 | 532 | } |
9ab315cc | 533 | |
5bc9c980 | 534 | ORDERED_HASHMAP_FOREACH(i, todo_uids, iterator) { |
b20b0b66 FB |
535 | struct spwd n = { |
536 | .sp_namp = i->name, | |
537 | .sp_pwdp = (char*) "!!", | |
538 | .sp_lstchg = lstchg, | |
539 | .sp_min = -1, | |
540 | .sp_max = -1, | |
541 | .sp_warn = -1, | |
542 | .sp_inact = -1, | |
543 | .sp_expire = -1, | |
544 | .sp_flag = (unsigned long) -1, /* this appears to be what everybody does ... */ | |
545 | }; | |
9ab315cc | 546 | |
b20b0b66 | 547 | errno = 0; |
1dd98a71 FB |
548 | if (putspent(&n, shadow) != 0) |
549 | return errno ? -errno : -EIO; | |
1b992147 LP |
550 | } |
551 | ||
0675e94a | 552 | r = fflush_sync_and_check(shadow); |
b20b0b66 | 553 | if (r < 0) |
1dd98a71 | 554 | return r; |
b20b0b66 FB |
555 | |
556 | *tmpfile = shadow; | |
557 | *tmpfile_path = shadow_tmp; | |
558 | shadow = NULL; | |
559 | shadow_tmp = NULL; | |
560 | return 0; | |
b20b0b66 | 561 | } |
1b992147 | 562 | |
b20b0b66 FB |
563 | static int write_temporary_group(const char *group_path, FILE **tmpfile, char **tmpfile_path) { |
564 | _cleanup_fclose_ FILE *original = NULL, *group = NULL; | |
1dd98a71 | 565 | _cleanup_(unlink_and_freep) char *group_tmp = NULL; |
b20b0b66 FB |
566 | bool group_changed = false; |
567 | Iterator iterator; | |
568 | Item *i; | |
569 | int r; | |
1b992147 | 570 | |
5bc9c980 | 571 | if (ordered_hashmap_size(todo_gids) == 0 && ordered_hashmap_size(members) == 0) |
b20b0b66 | 572 | return 0; |
e3c72c21 | 573 | |
b20b0b66 FB |
574 | r = fopen_temporary_label("/etc/group", group_path, &group, &group_tmp); |
575 | if (r < 0) | |
576 | return r; | |
577 | ||
578 | original = fopen(group_path, "re"); | |
579 | if (original) { | |
580 | struct group *gr; | |
581 | ||
582 | r = sync_rights(original, group); | |
583 | if (r < 0) | |
1dd98a71 | 584 | return r; |
b20b0b66 FB |
585 | |
586 | errno = 0; | |
587 | while ((gr = fgetgrent(original))) { | |
588 | /* Safety checks against name and GID collisions. Normally, | |
589 | * this should be unnecessary, but given that we look at the | |
590 | * entries anyway here, let's make an extra verification | |
591 | * step that we don't generate duplicate entries. */ | |
592 | ||
5bc9c980 | 593 | i = ordered_hashmap_get(groups, gr->gr_name); |
b20b0b66 FB |
594 | if (i && i->todo_group) { |
595 | log_error("%s: Group \"%s\" already exists.", group_path, gr->gr_name); | |
1dd98a71 | 596 | return -EEXIST; |
1b992147 | 597 | } |
b20b0b66 | 598 | |
5bc9c980 | 599 | if (ordered_hashmap_contains(todo_gids, GID_TO_PTR(gr->gr_gid))) { |
b20b0b66 | 600 | log_error("%s: Detected collision for GID " GID_FMT ".", group_path, gr->gr_gid); |
1dd98a71 | 601 | return -EEXIST; |
1b992147 LP |
602 | } |
603 | ||
b20b0b66 FB |
604 | r = putgrent_with_members(gr, group); |
605 | if (r < 0) | |
1dd98a71 | 606 | return r; |
b20b0b66 FB |
607 | if (r > 0) |
608 | group_changed = true; | |
609 | ||
610 | errno = 0; | |
611 | } | |
1dd98a71 FB |
612 | if (!IN_SET(errno, 0, ENOENT)) |
613 | return -errno; | |
614 | ||
615 | } else { | |
616 | if (errno != ENOENT) | |
617 | return -errno; | |
618 | if (fchmod(fileno(group), 0644) < 0) | |
619 | return -errno; | |
b20b0b66 | 620 | } |
7629889c | 621 | |
5bc9c980 | 622 | ORDERED_HASHMAP_FOREACH(i, todo_gids, iterator) { |
b20b0b66 FB |
623 | struct group n = { |
624 | .gr_name = i->name, | |
625 | .gr_gid = i->gid, | |
626 | .gr_passwd = (char*) "x", | |
627 | }; | |
1b992147 | 628 | |
b20b0b66 FB |
629 | r = putgrent_with_members(&n, group); |
630 | if (r < 0) | |
1dd98a71 | 631 | return r; |
7629889c | 632 | |
b20b0b66 FB |
633 | group_changed = true; |
634 | } | |
1b992147 | 635 | |
0675e94a | 636 | r = fflush_sync_and_check(group); |
b20b0b66 | 637 | if (r < 0) |
1dd98a71 | 638 | return r; |
1b992147 | 639 | |
b20b0b66 FB |
640 | if (group_changed) { |
641 | *tmpfile = group; | |
642 | *tmpfile_path = group_tmp; | |
643 | group = NULL; | |
644 | group_tmp = NULL; | |
645 | } | |
646 | return 0; | |
b20b0b66 FB |
647 | } |
648 | ||
649 | static int write_temporary_gshadow(const char * gshadow_path, FILE **tmpfile, char **tmpfile_path) { | |
349cc4a5 | 650 | #if ENABLE_GSHADOW |
b20b0b66 | 651 | _cleanup_fclose_ FILE *original = NULL, *gshadow = NULL; |
1dd98a71 | 652 | _cleanup_(unlink_and_freep) char *gshadow_tmp = NULL; |
b20b0b66 FB |
653 | bool group_changed = false; |
654 | Iterator iterator; | |
655 | Item *i; | |
656 | int r; | |
657 | ||
5bc9c980 | 658 | if (ordered_hashmap_size(todo_gids) == 0 && ordered_hashmap_size(members) == 0) |
b20b0b66 FB |
659 | return 0; |
660 | ||
661 | r = fopen_temporary_label("/etc/gshadow", gshadow_path, &gshadow, &gshadow_tmp); | |
662 | if (r < 0) | |
663 | return r; | |
9ab315cc | 664 | |
b20b0b66 FB |
665 | original = fopen(gshadow_path, "re"); |
666 | if (original) { | |
667 | struct sgrp *sg; | |
668 | ||
669 | r = sync_rights(original, gshadow); | |
1b992147 | 670 | if (r < 0) |
1dd98a71 | 671 | return r; |
9ab315cc | 672 | |
b20b0b66 FB |
673 | errno = 0; |
674 | while ((sg = fgetsgent(original))) { | |
c5abf225 | 675 | |
5bc9c980 | 676 | i = ordered_hashmap_get(groups, sg->sg_namp); |
b20b0b66 FB |
677 | if (i && i->todo_group) { |
678 | log_error("%s: Group \"%s\" already exists.", gshadow_path, sg->sg_namp); | |
1dd98a71 | 679 | return -EEXIST; |
b20b0b66 | 680 | } |
9ab315cc | 681 | |
b20b0b66 | 682 | r = putsgent_with_members(sg, gshadow); |
fff19499 | 683 | if (r < 0) |
1dd98a71 | 684 | return r; |
b20b0b66 FB |
685 | if (r > 0) |
686 | group_changed = true; | |
e3c72c21 | 687 | |
9ab315cc | 688 | errno = 0; |
b20b0b66 | 689 | } |
1dd98a71 FB |
690 | if (!IN_SET(errno, 0, ENOENT)) |
691 | return -errno; | |
692 | ||
693 | } else { | |
694 | if (errno != ENOENT) | |
695 | return -errno; | |
696 | if (fchmod(fileno(gshadow), 0000) < 0) | |
697 | return -errno; | |
b20b0b66 | 698 | } |
9ab315cc | 699 | |
5bc9c980 | 700 | ORDERED_HASHMAP_FOREACH(i, todo_gids, iterator) { |
b20b0b66 FB |
701 | struct sgrp n = { |
702 | .sg_namp = i->name, | |
703 | .sg_passwd = (char*) "!!", | |
704 | }; | |
9ab315cc | 705 | |
b20b0b66 | 706 | r = putsgent_with_members(&n, gshadow); |
9ab315cc | 707 | if (r < 0) |
1dd98a71 | 708 | return r; |
b20b0b66 FB |
709 | |
710 | group_changed = true; | |
9ab315cc LP |
711 | } |
712 | ||
0675e94a | 713 | r = fflush_sync_and_check(gshadow); |
b20b0b66 | 714 | if (r < 0) |
1dd98a71 | 715 | return r; |
b20b0b66 | 716 | |
9ab315cc | 717 | if (group_changed) { |
b20b0b66 FB |
718 | *tmpfile = gshadow; |
719 | *tmpfile_path = gshadow_tmp; | |
720 | gshadow = NULL; | |
721 | gshadow_tmp = NULL; | |
722 | } | |
723 | return 0; | |
b14e1b43 FB |
724 | #else |
725 | return 0; | |
726 | #endif | |
b20b0b66 FB |
727 | } |
728 | ||
729 | static int write_files(void) { | |
b20b0b66 | 730 | _cleanup_fclose_ FILE *passwd = NULL, *group = NULL, *shadow = NULL, *gshadow = NULL; |
1dd98a71 | 731 | _cleanup_(unlink_and_freep) char *passwd_tmp = NULL, *group_tmp = NULL, *shadow_tmp = NULL, *gshadow_tmp = NULL; |
b20b0b66 FB |
732 | const char *passwd_path = NULL, *group_path = NULL, *shadow_path = NULL, *gshadow_path = NULL; |
733 | int r; | |
734 | ||
735 | passwd_path = prefix_roota(arg_root, "/etc/passwd"); | |
736 | shadow_path = prefix_roota(arg_root, "/etc/shadow"); | |
737 | group_path = prefix_roota(arg_root, "/etc/group"); | |
738 | gshadow_path = prefix_roota(arg_root, "/etc/gshadow"); | |
739 | ||
740 | r = write_temporary_group(group_path, &group, &group_tmp); | |
741 | if (r < 0) | |
1dd98a71 | 742 | return r; |
b20b0b66 FB |
743 | |
744 | r = write_temporary_gshadow(gshadow_path, &gshadow, &gshadow_tmp); | |
745 | if (r < 0) | |
1dd98a71 | 746 | return r; |
b20b0b66 FB |
747 | |
748 | r = write_temporary_passwd(passwd_path, &passwd, &passwd_tmp); | |
749 | if (r < 0) | |
1dd98a71 | 750 | return r; |
b20b0b66 FB |
751 | |
752 | r = write_temporary_shadow(shadow_path, &shadow, &shadow_tmp); | |
753 | if (r < 0) | |
1dd98a71 | 754 | return r; |
b20b0b66 FB |
755 | |
756 | /* Make a backup of the old files */ | |
757 | if (group) { | |
758 | r = make_backup("/etc/group", group_path); | |
759 | if (r < 0) | |
1dd98a71 | 760 | return r; |
b20b0b66 FB |
761 | } |
762 | if (gshadow) { | |
763 | r = make_backup("/etc/gshadow", gshadow_path); | |
764 | if (r < 0) | |
1dd98a71 | 765 | return r; |
1b992147 LP |
766 | } |
767 | ||
768 | if (passwd) { | |
9f1c1940 | 769 | r = make_backup("/etc/passwd", passwd_path); |
1b992147 | 770 | if (r < 0) |
1dd98a71 | 771 | return r; |
1b992147 | 772 | } |
9ab315cc LP |
773 | if (shadow) { |
774 | r = make_backup("/etc/shadow", shadow_path); | |
775 | if (r < 0) | |
1dd98a71 | 776 | return r; |
9ab315cc | 777 | } |
1b992147 LP |
778 | |
779 | /* And make the new files count */ | |
b20b0b66 FB |
780 | if (group) { |
781 | r = rename_and_apply_smack(group_tmp, group_path); | |
782 | if (r < 0) | |
1dd98a71 | 783 | return r; |
9ab315cc | 784 | |
b20b0b66 FB |
785 | group_tmp = mfree(group_tmp); |
786 | } | |
787 | if (gshadow) { | |
788 | r = rename_and_apply_smack(gshadow_tmp, gshadow_path); | |
789 | if (r < 0) | |
1dd98a71 | 790 | return r; |
1b992147 | 791 | |
b20b0b66 | 792 | gshadow_tmp = mfree(gshadow_tmp); |
1b992147 LP |
793 | } |
794 | ||
795 | if (passwd) { | |
c02e7b1e SW |
796 | r = rename_and_apply_smack(passwd_tmp, passwd_path); |
797 | if (r < 0) | |
1dd98a71 | 798 | return r; |
1b992147 | 799 | |
97b11eed | 800 | passwd_tmp = mfree(passwd_tmp); |
1b992147 | 801 | } |
9ab315cc | 802 | if (shadow) { |
c02e7b1e SW |
803 | r = rename_and_apply_smack(shadow_tmp, shadow_path); |
804 | if (r < 0) | |
1dd98a71 | 805 | return r; |
9ab315cc | 806 | |
97b11eed | 807 | shadow_tmp = mfree(shadow_tmp); |
9ab315cc | 808 | } |
1b992147 | 809 | |
1dd98a71 | 810 | return 0; |
1b992147 LP |
811 | } |
812 | ||
b9ee05c2 | 813 | static int uid_is_ok(uid_t uid, const char *name, bool check_with_gid) { |
1b992147 LP |
814 | struct passwd *p; |
815 | struct group *g; | |
816 | const char *n; | |
817 | Item *i; | |
818 | ||
819 | /* Let's see if we already have assigned the UID a second time */ | |
5bc9c980 | 820 | if (ordered_hashmap_get(todo_uids, UID_TO_PTR(uid))) |
1b992147 LP |
821 | return 0; |
822 | ||
823 | /* Try to avoid using uids that are already used by a group | |
824 | * that doesn't have the same name as our new user. */ | |
b9ee05c2 MV |
825 | if (check_with_gid) { |
826 | i = ordered_hashmap_get(todo_gids, GID_TO_PTR(uid)); | |
827 | if (i && !streq(i->name, name)) | |
828 | return 0; | |
829 | } | |
1b992147 LP |
830 | |
831 | /* Let's check the files directly */ | |
832 | if (hashmap_contains(database_uid, UID_TO_PTR(uid))) | |
833 | return 0; | |
834 | ||
b9ee05c2 MV |
835 | if (check_with_gid) { |
836 | n = hashmap_get(database_gid, GID_TO_PTR(uid)); | |
837 | if (n && !streq(n, name)) | |
838 | return 0; | |
839 | } | |
1b992147 LP |
840 | |
841 | /* Let's also check via NSS, to avoid UID clashes over LDAP and such, just in case */ | |
842 | if (!arg_root) { | |
843 | errno = 0; | |
844 | p = getpwuid(uid); | |
845 | if (p) | |
846 | return 0; | |
b0284aba | 847 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
848 | return -errno; |
849 | ||
b9ee05c2 MV |
850 | if (check_with_gid) { |
851 | errno = 0; | |
852 | g = getgrgid((gid_t) uid); | |
853 | if (g) { | |
854 | if (!streq(g->gr_name, name)) | |
855 | return 0; | |
856 | } else if (!IN_SET(errno, 0, ENOENT)) | |
857 | return -errno; | |
858 | } | |
1b992147 LP |
859 | } |
860 | ||
861 | return 1; | |
862 | } | |
863 | ||
864 | static int root_stat(const char *p, struct stat *st) { | |
865 | const char *fix; | |
866 | ||
1d13f648 | 867 | fix = prefix_roota(arg_root, p); |
1b992147 LP |
868 | if (stat(fix, st) < 0) |
869 | return -errno; | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
874 | static int read_id_from_file(Item *i, uid_t *_uid, gid_t *_gid) { | |
875 | struct stat st; | |
876 | bool found_uid = false, found_gid = false; | |
56d21cde PDS |
877 | uid_t uid = 0; |
878 | gid_t gid = 0; | |
1b992147 LP |
879 | |
880 | assert(i); | |
881 | ||
882 | /* First, try to get the gid directly */ | |
883 | if (_gid && i->gid_path && root_stat(i->gid_path, &st) >= 0) { | |
884 | gid = st.st_gid; | |
885 | found_gid = true; | |
886 | } | |
887 | ||
888 | /* Then, try to get the uid directly */ | |
889 | if ((_uid || (_gid && !found_gid)) | |
890 | && i->uid_path | |
891 | && root_stat(i->uid_path, &st) >= 0) { | |
892 | ||
893 | uid = st.st_uid; | |
894 | found_uid = true; | |
895 | ||
896 | /* If we need the gid, but had no success yet, also derive it from the uid path */ | |
897 | if (_gid && !found_gid) { | |
898 | gid = st.st_gid; | |
899 | found_gid = true; | |
900 | } | |
901 | } | |
902 | ||
903 | /* If that didn't work yet, then let's reuse the gid as uid */ | |
904 | if (_uid && !found_uid && i->gid_path) { | |
905 | ||
906 | if (found_gid) { | |
907 | uid = (uid_t) gid; | |
908 | found_uid = true; | |
909 | } else if (root_stat(i->gid_path, &st) >= 0) { | |
910 | uid = (uid_t) st.st_gid; | |
911 | found_uid = true; | |
912 | } | |
913 | } | |
914 | ||
915 | if (_uid) { | |
916 | if (!found_uid) | |
917 | return 0; | |
918 | ||
919 | *_uid = uid; | |
920 | } | |
921 | ||
922 | if (_gid) { | |
923 | if (!found_gid) | |
924 | return 0; | |
925 | ||
926 | *_gid = gid; | |
927 | } | |
928 | ||
929 | return 1; | |
930 | } | |
931 | ||
932 | static int add_user(Item *i) { | |
933 | void *z; | |
934 | int r; | |
935 | ||
936 | assert(i); | |
937 | ||
938 | /* Check the database directly */ | |
939 | z = hashmap_get(database_user, i->name); | |
940 | if (z) { | |
941 | log_debug("User %s already exists.", i->name); | |
c1b6b04f | 942 | i->uid = PTR_TO_UID(z); |
1b992147 LP |
943 | i->uid_set = true; |
944 | return 0; | |
945 | } | |
946 | ||
947 | if (!arg_root) { | |
948 | struct passwd *p; | |
1b992147 LP |
949 | |
950 | /* Also check NSS */ | |
951 | errno = 0; | |
952 | p = getpwnam(i->name); | |
953 | if (p) { | |
954 | log_debug("User %s already exists.", i->name); | |
955 | i->uid = p->pw_uid; | |
956 | i->uid_set = true; | |
957 | ||
2fc09a9c DM |
958 | r = free_and_strdup(&i->description, p->pw_gecos); |
959 | if (r < 0) | |
960 | return log_oom(); | |
961 | ||
1b992147 LP |
962 | return 0; |
963 | } | |
4a62c710 MS |
964 | if (!IN_SET(errno, 0, ENOENT)) |
965 | return log_error_errno(errno, "Failed to check if user %s already exists: %m", i->name); | |
1b992147 LP |
966 | } |
967 | ||
968 | /* Try to use the suggested numeric uid */ | |
969 | if (i->uid_set) { | |
b9ee05c2 | 970 | r = uid_is_ok(i->uid, i->name, !i->id_set_strict); |
f647962d MS |
971 | if (r < 0) |
972 | return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid); | |
1b992147 LP |
973 | if (r == 0) { |
974 | log_debug("Suggested user ID " UID_FMT " for %s already used.", i->uid, i->name); | |
975 | i->uid_set = false; | |
976 | } | |
977 | } | |
978 | ||
979 | /* If that didn't work, try to read it from the specified path */ | |
980 | if (!i->uid_set) { | |
981 | uid_t c; | |
982 | ||
983 | if (read_id_from_file(i, &c, NULL) > 0) { | |
984 | ||
8530dc44 | 985 | if (c <= 0 || !uid_range_contains(uid_range, n_uid_range, c)) |
1b992147 LP |
986 | log_debug("User ID " UID_FMT " of file not suitable for %s.", c, i->name); |
987 | else { | |
b9ee05c2 | 988 | r = uid_is_ok(c, i->name, true); |
f647962d MS |
989 | if (r < 0) |
990 | return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid); | |
991 | else if (r > 0) { | |
1b992147 LP |
992 | i->uid = c; |
993 | i->uid_set = true; | |
994 | } else | |
995 | log_debug("User ID " UID_FMT " of file for %s is already used.", c, i->name); | |
996 | } | |
997 | } | |
998 | } | |
999 | ||
b938cb90 | 1000 | /* Otherwise, try to reuse the group ID */ |
1b992147 | 1001 | if (!i->uid_set && i->gid_set) { |
b9ee05c2 | 1002 | r = uid_is_ok((uid_t) i->gid, i->name, true); |
f647962d MS |
1003 | if (r < 0) |
1004 | return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid); | |
1b992147 LP |
1005 | if (r > 0) { |
1006 | i->uid = (uid_t) i->gid; | |
1007 | i->uid_set = true; | |
1008 | } | |
1009 | } | |
1010 | ||
1011 | /* And if that didn't work either, let's try to find a free one */ | |
1012 | if (!i->uid_set) { | |
8530dc44 LP |
1013 | for (;;) { |
1014 | r = uid_range_next_lower(uid_range, n_uid_range, &search_uid); | |
1015 | if (r < 0) { | |
1016 | log_error("No free user ID available for %s.", i->name); | |
1017 | return r; | |
1018 | } | |
1b992147 | 1019 | |
b9ee05c2 | 1020 | r = uid_is_ok(search_uid, i->name, true); |
f647962d MS |
1021 | if (r < 0) |
1022 | return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid); | |
1023 | else if (r > 0) | |
1b992147 LP |
1024 | break; |
1025 | } | |
1026 | ||
1b992147 LP |
1027 | i->uid_set = true; |
1028 | i->uid = search_uid; | |
1b992147 LP |
1029 | } |
1030 | ||
5bc9c980 | 1031 | r = ordered_hashmap_ensure_allocated(&todo_uids, NULL); |
1b992147 LP |
1032 | if (r < 0) |
1033 | return log_oom(); | |
1034 | ||
5bc9c980 | 1035 | r = ordered_hashmap_put(todo_uids, UID_TO_PTR(i->uid), i); |
1b992147 LP |
1036 | if (r < 0) |
1037 | return log_oom(); | |
1038 | ||
c1b6b04f | 1039 | i->todo_user = true; |
1b992147 LP |
1040 | log_info("Creating user %s (%s) with uid " UID_FMT " and gid " GID_FMT ".", i->name, strna(i->description), i->uid, i->gid); |
1041 | ||
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | static int gid_is_ok(gid_t gid) { | |
1046 | struct group *g; | |
1047 | struct passwd *p; | |
1048 | ||
5bc9c980 | 1049 | if (ordered_hashmap_get(todo_gids, GID_TO_PTR(gid))) |
1b992147 LP |
1050 | return 0; |
1051 | ||
1052 | /* Avoid reusing gids that are already used by a different user */ | |
5bc9c980 | 1053 | if (ordered_hashmap_get(todo_uids, UID_TO_PTR(gid))) |
1b992147 LP |
1054 | return 0; |
1055 | ||
1056 | if (hashmap_contains(database_gid, GID_TO_PTR(gid))) | |
1057 | return 0; | |
1058 | ||
1059 | if (hashmap_contains(database_uid, UID_TO_PTR(gid))) | |
1060 | return 0; | |
1061 | ||
1062 | if (!arg_root) { | |
1063 | errno = 0; | |
1064 | g = getgrgid(gid); | |
1065 | if (g) | |
1066 | return 0; | |
b0284aba | 1067 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
1068 | return -errno; |
1069 | ||
1070 | errno = 0; | |
1071 | p = getpwuid((uid_t) gid); | |
1072 | if (p) | |
1073 | return 0; | |
b0284aba | 1074 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
1075 | return -errno; |
1076 | } | |
1077 | ||
1078 | return 1; | |
1079 | } | |
1080 | ||
1081 | static int add_group(Item *i) { | |
1082 | void *z; | |
1083 | int r; | |
1084 | ||
1085 | assert(i); | |
1086 | ||
1087 | /* Check the database directly */ | |
1088 | z = hashmap_get(database_group, i->name); | |
1089 | if (z) { | |
1090 | log_debug("Group %s already exists.", i->name); | |
1091 | i->gid = PTR_TO_GID(z); | |
1092 | i->gid_set = true; | |
1093 | return 0; | |
1094 | } | |
1095 | ||
1096 | /* Also check NSS */ | |
1097 | if (!arg_root) { | |
1098 | struct group *g; | |
1099 | ||
1100 | errno = 0; | |
1101 | g = getgrnam(i->name); | |
1102 | if (g) { | |
1103 | log_debug("Group %s already exists.", i->name); | |
1104 | i->gid = g->gr_gid; | |
1105 | i->gid_set = true; | |
1106 | return 0; | |
1107 | } | |
4a62c710 MS |
1108 | if (!IN_SET(errno, 0, ENOENT)) |
1109 | return log_error_errno(errno, "Failed to check if group %s already exists: %m", i->name); | |
1b992147 LP |
1110 | } |
1111 | ||
1112 | /* Try to use the suggested numeric gid */ | |
1113 | if (i->gid_set) { | |
1114 | r = gid_is_ok(i->gid); | |
f647962d MS |
1115 | if (r < 0) |
1116 | return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid); | |
b9ee05c2 | 1117 | if (i->id_set_strict) { |
28e7fad7 MV |
1118 | /* If we require the gid to already exist we can return here: |
1119 | * r > 0: means the gid does not exist -> fail | |
1120 | * r == 0: means the gid exists -> nothing more to do. | |
1121 | */ | |
1122 | if (r > 0) { | |
1123 | log_error("Failed to create %s: please create GID %d", i->name, i->gid); | |
1124 | return -EINVAL; | |
1125 | } | |
1126 | if (r == 0) | |
1127 | return 0; | |
1128 | } | |
1b992147 LP |
1129 | if (r == 0) { |
1130 | log_debug("Suggested group ID " GID_FMT " for %s already used.", i->gid, i->name); | |
1131 | i->gid_set = false; | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | /* Try to reuse the numeric uid, if there's one */ | |
1136 | if (!i->gid_set && i->uid_set) { | |
1137 | r = gid_is_ok((gid_t) i->uid); | |
f647962d MS |
1138 | if (r < 0) |
1139 | return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid); | |
1b992147 LP |
1140 | if (r > 0) { |
1141 | i->gid = (gid_t) i->uid; | |
1142 | i->gid_set = true; | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | /* If that didn't work, try to read it from the specified path */ | |
1147 | if (!i->gid_set) { | |
1148 | gid_t c; | |
1149 | ||
1150 | if (read_id_from_file(i, NULL, &c) > 0) { | |
1151 | ||
8530dc44 | 1152 | if (c <= 0 || !uid_range_contains(uid_range, n_uid_range, c)) |
1b992147 LP |
1153 | log_debug("Group ID " GID_FMT " of file not suitable for %s.", c, i->name); |
1154 | else { | |
1155 | r = gid_is_ok(c); | |
f647962d MS |
1156 | if (r < 0) |
1157 | return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid); | |
1158 | else if (r > 0) { | |
1b992147 LP |
1159 | i->gid = c; |
1160 | i->gid_set = true; | |
1161 | } else | |
1162 | log_debug("Group ID " GID_FMT " of file for %s already used.", c, i->name); | |
1163 | } | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | /* And if that didn't work either, let's try to find a free one */ | |
1168 | if (!i->gid_set) { | |
8530dc44 LP |
1169 | for (;;) { |
1170 | /* We look for new GIDs in the UID pool! */ | |
1171 | r = uid_range_next_lower(uid_range, n_uid_range, &search_uid); | |
1172 | if (r < 0) { | |
1173 | log_error("No free group ID available for %s.", i->name); | |
1174 | return r; | |
1175 | } | |
1176 | ||
1177 | r = gid_is_ok(search_uid); | |
f647962d MS |
1178 | if (r < 0) |
1179 | return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid); | |
1180 | else if (r > 0) | |
1b992147 LP |
1181 | break; |
1182 | } | |
1183 | ||
1b992147 | 1184 | i->gid_set = true; |
8530dc44 | 1185 | i->gid = search_uid; |
1b992147 LP |
1186 | } |
1187 | ||
5bc9c980 | 1188 | r = ordered_hashmap_ensure_allocated(&todo_gids, NULL); |
1b992147 LP |
1189 | if (r < 0) |
1190 | return log_oom(); | |
1191 | ||
5bc9c980 | 1192 | r = ordered_hashmap_put(todo_gids, GID_TO_PTR(i->gid), i); |
1b992147 LP |
1193 | if (r < 0) |
1194 | return log_oom(); | |
1195 | ||
c1b6b04f | 1196 | i->todo_group = true; |
1b992147 LP |
1197 | log_info("Creating group %s with gid " GID_FMT ".", i->name, i->gid); |
1198 | ||
1199 | return 0; | |
1200 | } | |
1201 | ||
1202 | static int process_item(Item *i) { | |
1203 | int r; | |
1204 | ||
1205 | assert(i); | |
1206 | ||
1207 | switch (i->type) { | |
1208 | ||
1209 | case ADD_USER: | |
1210 | r = add_group(i); | |
1211 | if (r < 0) | |
1212 | return r; | |
1213 | ||
1214 | return add_user(i); | |
1215 | ||
e2c2060f | 1216 | case ADD_GROUP: |
1b992147 | 1217 | return add_group(i); |
1b992147 | 1218 | |
a12b0cc3 LP |
1219 | default: |
1220 | assert_not_reached("Unknown item type"); | |
1221 | } | |
1b992147 LP |
1222 | } |
1223 | ||
1224 | static void item_free(Item *i) { | |
1225 | ||
1226 | if (!i) | |
1227 | return; | |
1228 | ||
1229 | free(i->name); | |
1230 | free(i->uid_path); | |
1231 | free(i->gid_path); | |
1232 | free(i->description); | |
d9b8ea54 | 1233 | free(i->home); |
7b1aaf66 | 1234 | free(i->shell); |
1b992147 LP |
1235 | free(i); |
1236 | } | |
1237 | ||
1238 | DEFINE_TRIVIAL_CLEANUP_FUNC(Item*, item_free); | |
1239 | ||
a12b0cc3 LP |
1240 | static int add_implicit(void) { |
1241 | char *g, **l; | |
1242 | Iterator iterator; | |
1243 | int r; | |
1244 | ||
1245 | /* Implicitly create additional users and groups, if they were listed in "m" lines */ | |
1246 | ||
5bc9c980 | 1247 | ORDERED_HASHMAP_FOREACH_KEY(l, g, members, iterator) { |
a12b0cc3 LP |
1248 | Item *i; |
1249 | char **m; | |
1250 | ||
5bc9c980 | 1251 | i = ordered_hashmap_get(groups, g); |
a12b0cc3 LP |
1252 | if (!i) { |
1253 | _cleanup_(item_freep) Item *j = NULL; | |
1254 | ||
5bc9c980 | 1255 | r = ordered_hashmap_ensure_allocated(&groups, &string_hash_ops); |
a12b0cc3 LP |
1256 | if (r < 0) |
1257 | return log_oom(); | |
1258 | ||
1259 | j = new0(Item, 1); | |
1260 | if (!j) | |
1261 | return log_oom(); | |
1262 | ||
1263 | j->type = ADD_GROUP; | |
1264 | j->name = strdup(g); | |
1265 | if (!j->name) | |
1266 | return log_oom(); | |
1267 | ||
5bc9c980 | 1268 | r = ordered_hashmap_put(groups, j->name, j); |
a12b0cc3 LP |
1269 | if (r < 0) |
1270 | return log_oom(); | |
1271 | ||
1272 | log_debug("Adding implicit group '%s' due to m line", j->name); | |
1273 | j = NULL; | |
1274 | } | |
1275 | ||
1276 | STRV_FOREACH(m, l) { | |
1277 | ||
5bc9c980 | 1278 | i = ordered_hashmap_get(users, *m); |
a12b0cc3 LP |
1279 | if (!i) { |
1280 | _cleanup_(item_freep) Item *j = NULL; | |
1281 | ||
5bc9c980 | 1282 | r = ordered_hashmap_ensure_allocated(&users, &string_hash_ops); |
a12b0cc3 LP |
1283 | if (r < 0) |
1284 | return log_oom(); | |
1285 | ||
1286 | j = new0(Item, 1); | |
1287 | if (!j) | |
1288 | return log_oom(); | |
1289 | ||
1290 | j->type = ADD_USER; | |
1291 | j->name = strdup(*m); | |
1292 | if (!j->name) | |
1293 | return log_oom(); | |
1294 | ||
5bc9c980 | 1295 | r = ordered_hashmap_put(users, j->name, j); |
a12b0cc3 LP |
1296 | if (r < 0) |
1297 | return log_oom(); | |
1298 | ||
1299 | log_debug("Adding implicit user '%s' due to m line", j->name); | |
1300 | j = NULL; | |
1301 | } | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | return 0; | |
1306 | } | |
1307 | ||
1b992147 LP |
1308 | static bool item_equal(Item *a, Item *b) { |
1309 | assert(a); | |
1310 | assert(b); | |
1311 | ||
1312 | if (a->type != b->type) | |
1313 | return false; | |
1314 | ||
1315 | if (!streq_ptr(a->name, b->name)) | |
1316 | return false; | |
1317 | ||
1318 | if (!streq_ptr(a->uid_path, b->uid_path)) | |
1319 | return false; | |
1320 | ||
1321 | if (!streq_ptr(a->gid_path, b->gid_path)) | |
1322 | return false; | |
1323 | ||
1324 | if (!streq_ptr(a->description, b->description)) | |
1325 | return false; | |
1326 | ||
1327 | if (a->uid_set != b->uid_set) | |
1328 | return false; | |
1329 | ||
1330 | if (a->uid_set && a->uid != b->uid) | |
1331 | return false; | |
1332 | ||
1333 | if (a->gid_set != b->gid_set) | |
1334 | return false; | |
1335 | ||
1336 | if (a->gid_set && a->gid != b->gid) | |
1337 | return false; | |
1338 | ||
7629889c LP |
1339 | if (!streq_ptr(a->home, b->home)) |
1340 | return false; | |
1341 | ||
7b1aaf66 ZJS |
1342 | if (!streq_ptr(a->shell, b->shell)) |
1343 | return false; | |
1344 | ||
1b992147 LP |
1345 | return true; |
1346 | } | |
1347 | ||
1b992147 LP |
1348 | static int parse_line(const char *fname, unsigned line, const char *buffer) { |
1349 | ||
1350 | static const Specifier specifier_table[] = { | |
1351 | { 'm', specifier_machine_id, NULL }, | |
1352 | { 'b', specifier_boot_id, NULL }, | |
1353 | { 'H', specifier_host_name, NULL }, | |
1354 | { 'v', specifier_kernel_release, NULL }, | |
1355 | {} | |
1356 | }; | |
1357 | ||
7b1aaf66 ZJS |
1358 | _cleanup_free_ char *action = NULL, |
1359 | *name = NULL, *resolved_name = NULL, | |
1360 | *id = NULL, *resolved_id = NULL, | |
1361 | *description = NULL, | |
1362 | *home = NULL, | |
1363 | *shell, *resolved_shell = NULL; | |
1b992147 LP |
1364 | _cleanup_(item_freep) Item *i = NULL; |
1365 | Item *existing; | |
5bc9c980 | 1366 | OrderedHashmap *h; |
7629889c LP |
1367 | int r; |
1368 | const char *p; | |
1b992147 LP |
1369 | |
1370 | assert(fname); | |
1371 | assert(line >= 1); | |
1372 | assert(buffer); | |
1373 | ||
7629889c LP |
1374 | /* Parse columns */ |
1375 | p = buffer; | |
7b1aaf66 ZJS |
1376 | r = extract_many_words(&p, NULL, EXTRACT_QUOTES, |
1377 | &action, &name, &id, &description, &home, &shell, NULL); | |
7629889c | 1378 | if (r < 0) { |
1b992147 | 1379 | log_error("[%s:%u] Syntax error.", fname, line); |
7629889c LP |
1380 | return r; |
1381 | } | |
1382 | if (r < 2) { | |
1383 | log_error("[%s:%u] Missing action and name columns.", fname, line); | |
1384 | return -EINVAL; | |
1385 | } | |
4b1c1753 | 1386 | if (!isempty(p)) { |
7629889c LP |
1387 | log_error("[%s:%u] Trailing garbage.", fname, line); |
1388 | return -EINVAL; | |
1b992147 LP |
1389 | } |
1390 | ||
7629889c | 1391 | /* Verify action */ |
1b992147 LP |
1392 | if (strlen(action) != 1) { |
1393 | log_error("[%s:%u] Unknown modifier '%s'", fname, line, action); | |
1394 | return -EINVAL; | |
1395 | } | |
1396 | ||
8530dc44 | 1397 | if (!IN_SET(action[0], ADD_USER, ADD_GROUP, ADD_MEMBER, ADD_RANGE)) { |
61233823 | 1398 | log_error("[%s:%u] Unknown command type '%c'.", fname, line, action[0]); |
1b992147 LP |
1399 | return -EBADMSG; |
1400 | } | |
1401 | ||
7629889c | 1402 | /* Verify name */ |
97b11eed DH |
1403 | if (isempty(name) || streq(name, "-")) |
1404 | name = mfree(name); | |
1b992147 | 1405 | |
8530dc44 LP |
1406 | if (name) { |
1407 | r = specifier_printf(name, specifier_table, NULL, &resolved_name); | |
1408 | if (r < 0) { | |
1409 | log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, name); | |
1410 | return r; | |
1411 | } | |
1412 | ||
1413 | if (!valid_user_group_name(resolved_name)) { | |
1414 | log_error("[%s:%u] '%s' is not a valid user or group name.", fname, line, resolved_name); | |
1415 | return -EINVAL; | |
1416 | } | |
1b992147 LP |
1417 | } |
1418 | ||
8530dc44 | 1419 | /* Verify id */ |
97b11eed DH |
1420 | if (isempty(id) || streq(id, "-")) |
1421 | id = mfree(id); | |
7629889c | 1422 | |
8530dc44 LP |
1423 | if (id) { |
1424 | r = specifier_printf(id, specifier_table, NULL, &resolved_id); | |
1425 | if (r < 0) { | |
1426 | log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, name); | |
1427 | return r; | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | /* Verify description */ | |
97b11eed DH |
1432 | if (isempty(description) || streq(description, "-")) |
1433 | description = mfree(description); | |
1b992147 | 1434 | |
8530dc44 LP |
1435 | if (description) { |
1436 | if (!valid_gecos(description)) { | |
1437 | log_error("[%s:%u] '%s' is not a valid GECOS field.", fname, line, description); | |
1438 | return -EINVAL; | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | /* Verify home */ | |
97b11eed DH |
1443 | if (isempty(home) || streq(home, "-")) |
1444 | home = mfree(home); | |
1b992147 | 1445 | |
8530dc44 LP |
1446 | if (home) { |
1447 | if (!valid_home(home)) { | |
1448 | log_error("[%s:%u] '%s' is not a valid home directory field.", fname, line, home); | |
1449 | return -EINVAL; | |
1450 | } | |
1451 | } | |
1452 | ||
7b1aaf66 ZJS |
1453 | /* Verify shell */ |
1454 | if (isempty(shell) || streq(shell, "-")) | |
1455 | shell = mfree(shell); | |
1456 | ||
1457 | if (shell) { | |
1458 | r = specifier_printf(shell, specifier_table, NULL, &resolved_shell); | |
1459 | if (r < 0) { | |
1460 | log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, shell); | |
1461 | return r; | |
1462 | } | |
1463 | ||
1464 | if (!valid_shell(resolved_shell)) { | |
1465 | log_error("[%s:%u] '%s' is not a valid login shell field.", fname, line, resolved_shell); | |
1466 | return -EINVAL; | |
1467 | } | |
1468 | } | |
1469 | ||
1470 | ||
a12b0cc3 | 1471 | switch (action[0]) { |
1b992147 | 1472 | |
8530dc44 LP |
1473 | case ADD_RANGE: |
1474 | if (resolved_name) { | |
1475 | log_error("[%s:%u] Lines of type 'r' don't take a name field.", fname, line); | |
1476 | return -EINVAL; | |
1477 | } | |
1b992147 | 1478 | |
8530dc44 LP |
1479 | if (!resolved_id) { |
1480 | log_error("[%s:%u] Lines of type 'r' require a ID range in the third field.", fname, line); | |
1481 | return -EINVAL; | |
1482 | } | |
1b992147 | 1483 | |
7b1aaf66 ZJS |
1484 | if (description || home || shell) { |
1485 | log_error("[%s:%u] Lines of type '%c' don't take a %s field.", | |
1486 | fname, line, action[0], | |
1487 | description ? "GECOS" : home ? "home directory" : "login shell"); | |
7629889c LP |
1488 | return -EINVAL; |
1489 | } | |
1490 | ||
8530dc44 LP |
1491 | r = uid_range_add_str(&uid_range, &n_uid_range, resolved_id); |
1492 | if (r < 0) { | |
1493 | log_error("[%s:%u] Invalid UID range %s.", fname, line, resolved_id); | |
a12b0cc3 LP |
1494 | return -EINVAL; |
1495 | } | |
1b992147 | 1496 | |
8530dc44 LP |
1497 | return 0; |
1498 | ||
1499 | case ADD_MEMBER: { | |
1500 | char **l; | |
1501 | ||
1502 | /* Try to extend an existing member or group item */ | |
1503 | if (!name) { | |
1504 | log_error("[%s:%u] Lines of type 'm' require a user name in the second field.", fname, line); | |
1505 | return -EINVAL; | |
1506 | } | |
1507 | ||
1508 | if (!resolved_id) { | |
1509 | log_error("[%s:%u] Lines of type 'm' require a group name in the third field.", fname, line); | |
1510 | return -EINVAL; | |
a12b0cc3 | 1511 | } |
1b992147 | 1512 | |
a12b0cc3 LP |
1513 | if (!valid_user_group_name(resolved_id)) { |
1514 | log_error("[%s:%u] '%s' is not a valid user or group name.", fname, line, resolved_id); | |
1515 | return -EINVAL; | |
1516 | } | |
1b992147 | 1517 | |
7b1aaf66 ZJS |
1518 | if (description || home || shell) { |
1519 | log_error("[%s:%u] Lines of type '%c' don't take a %s field.", | |
1520 | fname, line, action[0], | |
1521 | description ? "GECOS" : home ? "home directory" : "login shell"); | |
8530dc44 LP |
1522 | return -EINVAL; |
1523 | } | |
1524 | ||
5bc9c980 | 1525 | r = ordered_hashmap_ensure_allocated(&members, &string_hash_ops); |
7629889c LP |
1526 | if (r < 0) |
1527 | return log_oom(); | |
a12b0cc3 | 1528 | |
5bc9c980 | 1529 | l = ordered_hashmap_get(members, resolved_id); |
a12b0cc3 LP |
1530 | if (l) { |
1531 | /* A list for this group name already exists, let's append to it */ | |
1532 | r = strv_push(&l, resolved_name); | |
1533 | if (r < 0) | |
1534 | return log_oom(); | |
1535 | ||
1536 | resolved_name = NULL; | |
1537 | ||
5bc9c980 | 1538 | assert_se(ordered_hashmap_update(members, resolved_id, l) >= 0); |
1b992147 | 1539 | } else { |
a12b0cc3 LP |
1540 | /* No list for this group name exists yet, create one */ |
1541 | ||
1542 | l = new0(char *, 2); | |
1543 | if (!l) | |
1544 | return -ENOMEM; | |
1545 | ||
1546 | l[0] = resolved_name; | |
1547 | l[1] = NULL; | |
1b992147 | 1548 | |
5bc9c980 | 1549 | r = ordered_hashmap_put(members, resolved_id, l); |
1b992147 | 1550 | if (r < 0) { |
a12b0cc3 LP |
1551 | free(l); |
1552 | return log_oom(); | |
1b992147 LP |
1553 | } |
1554 | ||
a12b0cc3 | 1555 | resolved_id = resolved_name = NULL; |
1b992147 | 1556 | } |
a12b0cc3 LP |
1557 | |
1558 | return 0; | |
1b992147 LP |
1559 | } |
1560 | ||
a12b0cc3 | 1561 | case ADD_USER: |
8530dc44 LP |
1562 | if (!name) { |
1563 | log_error("[%s:%u] Lines of type 'u' require a user name in the second field.", fname, line); | |
1564 | return -EINVAL; | |
1565 | } | |
1566 | ||
5bc9c980 | 1567 | r = ordered_hashmap_ensure_allocated(&users, &string_hash_ops); |
a12b0cc3 LP |
1568 | if (r < 0) |
1569 | return log_oom(); | |
1570 | ||
1571 | i = new0(Item, 1); | |
1572 | if (!i) | |
1573 | return log_oom(); | |
1574 | ||
8530dc44 LP |
1575 | if (resolved_id) { |
1576 | if (path_is_absolute(resolved_id)) { | |
1577 | i->uid_path = resolved_id; | |
1578 | resolved_id = NULL; | |
a12b0cc3 LP |
1579 | |
1580 | path_kill_slashes(i->uid_path); | |
a12b0cc3 | 1581 | } else { |
4cb41413 MV |
1582 | _cleanup_free_ char *uid = NULL, *gid = NULL; |
1583 | if (split_pair(resolved_id, ":", &uid, &gid) == 0) { | |
1584 | r = parse_gid(gid, &i->gid); | |
1585 | if (r < 0) | |
1586 | return log_error_errno(r, "Failed to parse GID: '%s': %m", id); | |
1587 | i->gid_set = true; | |
b9ee05c2 | 1588 | i->id_set_strict = true; |
4cb41413 | 1589 | free_and_replace(resolved_id, uid); |
a12b0cc3 | 1590 | } |
4cb41413 MV |
1591 | r = parse_uid(resolved_id, &i->uid); |
1592 | if (r < 0) | |
1593 | return log_error_errno(r, "Failed to parse UID: '%s': %m", id); | |
a12b0cc3 LP |
1594 | |
1595 | i->uid_set = true; | |
1596 | } | |
1597 | } | |
1598 | ||
8530dc44 LP |
1599 | i->description = description; |
1600 | description = NULL; | |
7629889c | 1601 | |
8530dc44 LP |
1602 | i->home = home; |
1603 | home = NULL; | |
a12b0cc3 | 1604 | |
7b1aaf66 ZJS |
1605 | i->shell = resolved_shell; |
1606 | resolved_shell = NULL; | |
1607 | ||
1b992147 | 1608 | h = users; |
a12b0cc3 LP |
1609 | break; |
1610 | ||
1611 | case ADD_GROUP: | |
8530dc44 LP |
1612 | if (!name) { |
1613 | log_error("[%s:%u] Lines of type 'g' require a user name in the second field.", fname, line); | |
1614 | return -EINVAL; | |
1615 | } | |
a12b0cc3 | 1616 | |
7b1aaf66 ZJS |
1617 | if (description || home || shell) { |
1618 | log_error("[%s:%u] Lines of type '%c' don't take a %s field.", | |
1619 | fname, line, action[0], | |
1620 | description ? "GECOS" : home ? "home directory" : "login shell"); | |
7629889c LP |
1621 | return -EINVAL; |
1622 | } | |
1623 | ||
5bc9c980 | 1624 | r = ordered_hashmap_ensure_allocated(&groups, &string_hash_ops); |
7629889c LP |
1625 | if (r < 0) |
1626 | return log_oom(); | |
1627 | ||
a12b0cc3 LP |
1628 | i = new0(Item, 1); |
1629 | if (!i) | |
1630 | return log_oom(); | |
1631 | ||
8530dc44 LP |
1632 | if (resolved_id) { |
1633 | if (path_is_absolute(resolved_id)) { | |
1634 | i->gid_path = resolved_id; | |
1635 | resolved_id = NULL; | |
a12b0cc3 LP |
1636 | |
1637 | path_kill_slashes(i->gid_path); | |
1638 | } else { | |
8530dc44 | 1639 | r = parse_gid(resolved_id, &i->gid); |
4cb41413 MV |
1640 | if (r < 0) |
1641 | return log_error_errno(r, "Failed to parse GID: '%s': %m", id); | |
a12b0cc3 LP |
1642 | |
1643 | i->gid_set = true; | |
1644 | } | |
1645 | } | |
1646 | ||
1b992147 | 1647 | h = groups; |
a12b0cc3 | 1648 | break; |
8530dc44 | 1649 | |
bce415ed RC |
1650 | default: |
1651 | return -EBADMSG; | |
1b992147 | 1652 | } |
a12b0cc3 LP |
1653 | |
1654 | i->type = action[0]; | |
1655 | i->name = resolved_name; | |
1656 | resolved_name = NULL; | |
1b992147 | 1657 | |
5bc9c980 | 1658 | existing = ordered_hashmap_get(h, i->name); |
1b992147 LP |
1659 | if (existing) { |
1660 | ||
1661 | /* Two identical items are fine */ | |
1662 | if (!item_equal(existing, i)) | |
1663 | log_warning("Two or more conflicting lines for %s configured, ignoring.", i->name); | |
1664 | ||
1665 | return 0; | |
1666 | } | |
1667 | ||
5bc9c980 | 1668 | r = ordered_hashmap_put(h, i->name, i); |
a12b0cc3 LP |
1669 | if (r < 0) |
1670 | return log_oom(); | |
1b992147 LP |
1671 | |
1672 | i = NULL; | |
1673 | return 0; | |
1674 | } | |
1675 | ||
1676 | static int read_config_file(const char *fn, bool ignore_enoent) { | |
dfc87cbf LP |
1677 | _cleanup_fclose_ FILE *rf = NULL; |
1678 | FILE *f = NULL; | |
1b992147 LP |
1679 | char line[LINE_MAX]; |
1680 | unsigned v = 0; | |
c4640902 | 1681 | int r = 0; |
1b992147 LP |
1682 | |
1683 | assert(fn); | |
1684 | ||
dfc87cbf LP |
1685 | if (streq(fn, "-")) |
1686 | f = stdin; | |
1687 | else { | |
1688 | r = search_and_fopen_nulstr(fn, "re", arg_root, conf_file_dirs, &rf); | |
1689 | if (r < 0) { | |
1690 | if (ignore_enoent && r == -ENOENT) | |
1691 | return 0; | |
1b992147 | 1692 | |
8d3d7072 | 1693 | return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn); |
dfc87cbf LP |
1694 | } |
1695 | ||
1696 | f = rf; | |
1b992147 LP |
1697 | } |
1698 | ||
1699 | FOREACH_LINE(line, f, break) { | |
1700 | char *l; | |
1701 | int k; | |
1702 | ||
1703 | v++; | |
1704 | ||
1705 | l = strstrip(line); | |
4c701096 | 1706 | if (IN_SET(*l, 0, '#')) |
1b992147 LP |
1707 | continue; |
1708 | ||
1709 | k = parse_line(fn, v, l); | |
1710 | if (k < 0 && r == 0) | |
1711 | r = k; | |
1712 | } | |
1713 | ||
1714 | if (ferror(f)) { | |
56f64d95 | 1715 | log_error_errno(errno, "Failed to read from file %s: %m", fn); |
1b992147 LP |
1716 | if (r == 0) |
1717 | r = -EIO; | |
1718 | } | |
1719 | ||
1720 | return r; | |
1721 | } | |
1722 | ||
1b992147 LP |
1723 | static void free_database(Hashmap *by_name, Hashmap *by_id) { |
1724 | char *name; | |
1725 | ||
1726 | for (;;) { | |
1727 | name = hashmap_first(by_id); | |
1728 | if (!name) | |
1729 | break; | |
1730 | ||
1731 | hashmap_remove(by_name, name); | |
1732 | ||
1733 | hashmap_steal_first_key(by_id); | |
1734 | free(name); | |
1735 | } | |
1736 | ||
1737 | while ((name = hashmap_steal_first_key(by_name))) | |
1738 | free(name); | |
1739 | ||
1740 | hashmap_free(by_name); | |
1741 | hashmap_free(by_id); | |
1742 | } | |
1743 | ||
601185b4 | 1744 | static void help(void) { |
1b992147 LP |
1745 | printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" |
1746 | "Creates system user accounts.\n\n" | |
1747 | " -h --help Show this help\n" | |
1748 | " --version Show package version\n" | |
601185b4 | 1749 | " --root=PATH Operate on an alternate filesystem root\n" |
d16a1c1b | 1750 | " --replace=PATH Treat arguments as replacement for PATH\n" |
1b600bd5 | 1751 | " --inline Treat arguments as configuration lines\n" |
601185b4 | 1752 | , program_invocation_short_name); |
1b992147 LP |
1753 | } |
1754 | ||
1755 | static int parse_argv(int argc, char *argv[]) { | |
1756 | ||
1757 | enum { | |
1758 | ARG_VERSION = 0x100, | |
1759 | ARG_ROOT, | |
d16a1c1b | 1760 | ARG_REPLACE, |
1b600bd5 | 1761 | ARG_INLINE, |
1b992147 LP |
1762 | }; |
1763 | ||
1764 | static const struct option options[] = { | |
1765 | { "help", no_argument, NULL, 'h' }, | |
1766 | { "version", no_argument, NULL, ARG_VERSION }, | |
1767 | { "root", required_argument, NULL, ARG_ROOT }, | |
d16a1c1b | 1768 | { "replace", required_argument, NULL, ARG_REPLACE }, |
1b600bd5 | 1769 | { "inline", no_argument, NULL, ARG_INLINE }, |
1b992147 LP |
1770 | {} |
1771 | }; | |
1772 | ||
0f474365 | 1773 | int c, r; |
1b992147 LP |
1774 | |
1775 | assert(argc >= 0); | |
1776 | assert(argv); | |
1777 | ||
601185b4 | 1778 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) |
1b992147 LP |
1779 | |
1780 | switch (c) { | |
1781 | ||
1782 | case 'h': | |
601185b4 ZJS |
1783 | help(); |
1784 | return 0; | |
1b992147 LP |
1785 | |
1786 | case ARG_VERSION: | |
3f6fd1ba | 1787 | return version(); |
1b992147 LP |
1788 | |
1789 | case ARG_ROOT: | |
0f03c2a4 | 1790 | r = parse_path_argument_and_warn(optarg, true, &arg_root); |
0f474365 | 1791 | if (r < 0) |
0f03c2a4 | 1792 | return r; |
1b992147 LP |
1793 | break; |
1794 | ||
d16a1c1b ZJS |
1795 | case ARG_REPLACE: |
1796 | if (!path_is_absolute(optarg) || | |
1797 | !endswith(optarg, ".conf")) { | |
1798 | log_error("The argument to --replace= must an absolute path to a config file"); | |
1799 | return -EINVAL; | |
1800 | } | |
1801 | ||
1802 | arg_replace = optarg; | |
1803 | break; | |
1804 | ||
1b600bd5 ZJS |
1805 | case ARG_INLINE: |
1806 | arg_inline = true; | |
1807 | break; | |
1808 | ||
1b992147 LP |
1809 | case '?': |
1810 | return -EINVAL; | |
1811 | ||
1812 | default: | |
1813 | assert_not_reached("Unhandled option"); | |
1814 | } | |
1b992147 | 1815 | |
d16a1c1b ZJS |
1816 | if (arg_replace && optind >= argc) { |
1817 | log_error("When --replace= is given, some configuration items must be specified"); | |
1818 | return -EINVAL; | |
1819 | } | |
1820 | ||
1b992147 LP |
1821 | return 1; |
1822 | } | |
1823 | ||
d16a1c1b ZJS |
1824 | static int parse_arguments(char **args) { |
1825 | char **arg; | |
1826 | unsigned pos = 1; | |
1827 | int r; | |
1828 | ||
1829 | STRV_FOREACH(arg, args) { | |
1830 | if (arg_inline) | |
1831 | /* Use (argument):n, where n==1 for the first positional arg */ | |
1832 | r = parse_line("(argument)", pos, *arg); | |
1833 | else | |
1834 | r = read_config_file(*arg, false); | |
1835 | if (r < 0) | |
1836 | return r; | |
1837 | ||
1838 | pos++; | |
1839 | } | |
1840 | ||
1841 | return 0; | |
1842 | } | |
1843 | ||
1844 | static int read_config_files(const char* dirs, char **args) { | |
1845 | _cleanup_strv_free_ char **files = NULL; | |
1846 | _cleanup_free_ char *p = NULL; | |
1847 | char **f; | |
1848 | int r; | |
1849 | ||
1850 | r = conf_files_list_nulstr(&files, ".conf", arg_root, 0, dirs); | |
1851 | if (r < 0) | |
1852 | return log_error_errno(r, "Failed to enumerate sysusers.d files: %m"); | |
1853 | ||
1854 | if (arg_replace) { | |
1855 | r = conf_files_insert(&files, arg_root, dirs, arg_replace); | |
1856 | if (r < 0) | |
1857 | return log_error_errno(r, "Failed to extend sysusers.d file list: %m"); | |
1858 | ||
1859 | p = path_join(arg_root, arg_replace, NULL); | |
1860 | if (!p) | |
1861 | return log_oom(); | |
1862 | } | |
1863 | ||
1864 | STRV_FOREACH(f, files) | |
1865 | if (p && path_equal(*f, p)) { | |
1866 | log_debug("Parsing arguments at position \"%s\"…", *f); | |
1867 | ||
1868 | r = parse_arguments(args); | |
1869 | if (r < 0) | |
1870 | return r; | |
1871 | } else { | |
1872 | log_debug("Reading config file \"%s\"…", *f); | |
1873 | ||
1874 | /* Just warn, ignore result otherwise */ | |
1875 | (void) read_config_file(*f, true); | |
1876 | } | |
1877 | ||
1878 | return 0; | |
1879 | } | |
1880 | ||
1b992147 LP |
1881 | int main(int argc, char *argv[]) { |
1882 | ||
1883 | _cleanup_close_ int lock = -1; | |
1884 | Iterator iterator; | |
d16a1c1b | 1885 | int r; |
1b992147 | 1886 | Item *i; |
a12b0cc3 | 1887 | char *n; |
1b992147 LP |
1888 | |
1889 | r = parse_argv(argc, argv); | |
1890 | if (r <= 0) | |
1891 | goto finish; | |
1892 | ||
1893 | log_set_target(LOG_TARGET_AUTO); | |
1894 | log_parse_environment(); | |
1895 | log_open(); | |
1896 | ||
1897 | umask(0022); | |
1898 | ||
c3dacc8b | 1899 | r = mac_selinux_init(); |
9f1c1940 | 1900 | if (r < 0) { |
da927ba9 | 1901 | log_error_errno(r, "SELinux setup failed: %m"); |
9f1c1940 ZJS |
1902 | goto finish; |
1903 | } | |
1b992147 | 1904 | |
d16a1c1b ZJS |
1905 | /* If command line arguments are specified along with --replace, read all |
1906 | * configuration files and insert the positional arguments at the specified | |
1907 | * place. Otherwise, if command line arguments are specified, execute just | |
1908 | * them, and finally, without --replace= or any positional arguments, just | |
1909 | * read configuration and execute it. | |
1910 | */ | |
1911 | if (arg_replace || optind >= argc) | |
1912 | r = read_config_files(conf_file_dirs, argv + optind); | |
1913 | else | |
1914 | r = parse_arguments(argv + optind); | |
1915 | if (r < 0) | |
1916 | goto finish; | |
1b992147 | 1917 | |
fe102d6a LP |
1918 | /* Let's tell nss-systemd not to synthesize the "root" and "nobody" entries for it, so that our detection |
1919 | * whether the names or UID/GID area already used otherwise doesn't get confused. After all, even though | |
1920 | * nss-systemd synthesizes these users/groups, they should still appear in /etc/passwd and /etc/group, as the | |
1921 | * synthesizing logic is merely supposed to be fallback for cases where we run with a completely unpopulated | |
1922 | * /etc. */ | |
1923 | if (setenv("SYSTEMD_NSS_BYPASS_SYNTHETIC", "1", 1) < 0) { | |
1924 | r = log_error_errno(errno, "Failed to set SYSTEMD_NSS_BYPASS_SYNTHETIC environment variable: %m"); | |
1925 | goto finish; | |
1926 | } | |
1927 | ||
8530dc44 | 1928 | if (!uid_range) { |
b9ee05c2 | 1929 | /* Default to default range of 1..SYSTEM_UID_MAX */ |
8530dc44 LP |
1930 | r = uid_range_add(&uid_range, &n_uid_range, 1, SYSTEM_UID_MAX); |
1931 | if (r < 0) { | |
1932 | log_oom(); | |
1933 | goto finish; | |
1934 | } | |
1935 | } | |
1936 | ||
a12b0cc3 LP |
1937 | r = add_implicit(); |
1938 | if (r < 0) | |
1939 | goto finish; | |
1940 | ||
e929bee0 | 1941 | lock = take_etc_passwd_lock(arg_root); |
1b992147 | 1942 | if (lock < 0) { |
d1e4b8fd | 1943 | log_error_errno(lock, "Failed to take /etc/passwd lock: %m"); |
1b992147 LP |
1944 | goto finish; |
1945 | } | |
1946 | ||
1947 | r = load_user_database(); | |
1948 | if (r < 0) { | |
da927ba9 | 1949 | log_error_errno(r, "Failed to load user database: %m"); |
1b992147 LP |
1950 | goto finish; |
1951 | } | |
1952 | ||
1953 | r = load_group_database(); | |
1954 | if (r < 0) { | |
da927ba9 | 1955 | log_error_errno(r, "Failed to read group database: %m"); |
1b992147 LP |
1956 | goto finish; |
1957 | } | |
1958 | ||
5bc9c980 | 1959 | ORDERED_HASHMAP_FOREACH(i, groups, iterator) |
1b992147 LP |
1960 | process_item(i); |
1961 | ||
5bc9c980 | 1962 | ORDERED_HASHMAP_FOREACH(i, users, iterator) |
1b992147 LP |
1963 | process_item(i); |
1964 | ||
1965 | r = write_files(); | |
1966 | if (r < 0) | |
da927ba9 | 1967 | log_error_errno(r, "Failed to write files: %m"); |
1b992147 LP |
1968 | |
1969 | finish: | |
5bc9c980 MV |
1970 | ordered_hashmap_free_with_destructor(groups, item_free); |
1971 | ordered_hashmap_free_with_destructor(users, item_free); | |
1b992147 | 1972 | |
5bc9c980 MV |
1973 | while ((n = ordered_hashmap_first_key(members))) { |
1974 | strv_free(ordered_hashmap_steal_first(members)); | |
a12b0cc3 LP |
1975 | free(n); |
1976 | } | |
5bc9c980 | 1977 | ordered_hashmap_free(members); |
224b0e7a | 1978 | |
5bc9c980 MV |
1979 | ordered_hashmap_free(todo_uids); |
1980 | ordered_hashmap_free(todo_gids); | |
1b992147 LP |
1981 | |
1982 | free_database(database_user, database_uid); | |
1983 | free_database(database_group, database_gid); | |
1984 | ||
1985 | free(arg_root); | |
1986 | ||
1987 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1988 | } |