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1b992147 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <sys/types.h> | |
23 | #include <pwd.h> | |
24 | #include <grp.h> | |
25 | #include <shadow.h> | |
26 | #include <getopt.h> | |
932ad62b | 27 | #include <utmp.h> |
1b992147 LP |
28 | |
29 | #include "util.h" | |
30 | #include "hashmap.h" | |
31 | #include "specifier.h" | |
32 | #include "path-util.h" | |
33 | #include "build.h" | |
34 | #include "strv.h" | |
35 | #include "conf-files.h" | |
36 | #include "copy.h" | |
37 | #include "utf8.h" | |
f7f628b5 ZJS |
38 | #include "label.h" |
39 | #include "fileio-label.h" | |
1b992147 LP |
40 | |
41 | typedef enum ItemType { | |
42 | ADD_USER = 'u', | |
43 | ADD_GROUP = 'g', | |
a12b0cc3 | 44 | ADD_MEMBER = 'm', |
1b992147 LP |
45 | } ItemType; |
46 | typedef struct Item { | |
47 | ItemType type; | |
48 | ||
49 | char *name; | |
50 | char *uid_path; | |
51 | char *gid_path; | |
52 | char *description; | |
53 | ||
54 | gid_t gid; | |
55 | uid_t uid; | |
56 | ||
57 | bool gid_set:1; | |
58 | bool uid_set:1; | |
59 | ||
c1b6b04f KS |
60 | bool todo_user:1; |
61 | bool todo_group:1; | |
1b992147 LP |
62 | } Item; |
63 | ||
64 | static char *arg_root = NULL; | |
65 | ||
66 | static const char conf_file_dirs[] = | |
938a560b ZJS |
67 | "/etc/sysusers.d\0" |
68 | "/run/sysusers.d\0" | |
1b992147 LP |
69 | "/usr/local/lib/sysusers.d\0" |
70 | "/usr/lib/sysusers.d\0" | |
71 | #ifdef HAVE_SPLIT_USR | |
72 | "/lib/sysusers.d\0" | |
73 | #endif | |
74 | ; | |
75 | ||
76 | static Hashmap *users = NULL, *groups = NULL; | |
77 | static Hashmap *todo_uids = NULL, *todo_gids = NULL; | |
a12b0cc3 | 78 | static Hashmap *members = NULL; |
1b992147 LP |
79 | |
80 | static Hashmap *database_uid = NULL, *database_user = NULL; | |
81 | static Hashmap *database_gid = NULL, *database_group = NULL; | |
82 | ||
83 | static uid_t search_uid = SYSTEM_UID_MAX; | |
84 | static gid_t search_gid = SYSTEM_GID_MAX; | |
85 | ||
86 | #define UID_TO_PTR(u) (ULONG_TO_PTR(u+1)) | |
87 | #define PTR_TO_UID(u) ((uid_t) (PTR_TO_ULONG(u)-1)) | |
88 | ||
89 | #define GID_TO_PTR(g) (ULONG_TO_PTR(g+1)) | |
90 | #define PTR_TO_GID(g) ((gid_t) (PTR_TO_ULONG(g)-1)) | |
91 | ||
92 | #define fix_root(x) (arg_root ? strappenda(arg_root, x) : x) | |
93 | ||
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 | ||
100 | passwd_path = fix_root("/etc/passwd"); | |
101 | f = fopen(passwd_path, "re"); | |
102 | if (!f) | |
103 | return errno == ENOENT ? 0 : -errno; | |
104 | ||
105 | r = hashmap_ensure_allocated(&database_user, string_hash_func, string_compare_func); | |
106 | if (r < 0) | |
107 | return r; | |
108 | ||
109 | r = hashmap_ensure_allocated(&database_uid, trivial_hash_func, trivial_compare_func); | |
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 | ||
152 | group_path = fix_root("/etc/group"); | |
153 | f = fopen(group_path, "re"); | |
154 | if (!f) | |
155 | return errno == ENOENT ? 0 : -errno; | |
156 | ||
157 | r = hashmap_ensure_allocated(&database_group, string_hash_func, string_compare_func); | |
158 | if (r < 0) | |
159 | return r; | |
160 | ||
161 | r = hashmap_ensure_allocated(&database_gid, trivial_hash_func, trivial_compare_func); | |
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 | ||
198 | static int make_backup(const char *x) { | |
199 | _cleanup_close_ int src = -1, dst = -1; | |
200 | char *backup, *temp; | |
201 | struct timespec ts[2]; | |
202 | struct stat st; | |
203 | int r; | |
204 | ||
205 | src = open(x, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
206 | if (src < 0) { | |
207 | if (errno == ENOENT) /* No backup necessary... */ | |
208 | return 0; | |
209 | ||
210 | return -errno; | |
211 | } | |
212 | ||
213 | if (fstat(src, &st) < 0) | |
214 | return -errno; | |
215 | ||
216 | temp = strappenda(x, ".XXXXXX"); | |
217 | dst = mkostemp_safe(temp, O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
218 | if (dst < 0) | |
219 | return dst; | |
220 | ||
93240d3a | 221 | r = copy_bytes(src, dst, (off_t) -1); |
1b992147 LP |
222 | if (r < 0) |
223 | goto fail; | |
224 | ||
225 | /* Copy over the access mask */ | |
226 | if (fchmod(dst, st.st_mode & 07777) < 0) { | |
227 | r = -errno; | |
228 | goto fail; | |
229 | } | |
230 | ||
231 | /* Don't fail on chmod(). If it stays owned by us, then it | |
232 | * isn't too bad... */ | |
233 | fchown(dst, st.st_uid, st.st_gid); | |
234 | ||
235 | ts[0] = st.st_atim; | |
236 | ts[1] = st.st_mtim; | |
237 | futimens(dst, ts); | |
238 | ||
239 | backup = strappenda(x, "-"); | |
240 | if (rename(temp, backup) < 0) | |
241 | goto fail; | |
242 | ||
243 | return 0; | |
244 | ||
245 | fail: | |
246 | unlink(temp); | |
247 | return r; | |
248 | } | |
249 | ||
a12b0cc3 LP |
250 | static int putgrent_with_members(const struct group *gr, FILE *group) { |
251 | char **a; | |
252 | ||
253 | assert(gr); | |
254 | assert(group); | |
255 | ||
256 | a = hashmap_get(members, gr->gr_name); | |
257 | if (a) { | |
258 | _cleanup_strv_free_ char **l = NULL; | |
259 | bool added = false; | |
260 | char **i; | |
261 | ||
262 | l = strv_copy(gr->gr_mem); | |
263 | if (!l) | |
264 | return -ENOMEM; | |
265 | ||
266 | STRV_FOREACH(i, a) { | |
267 | if (strv_find(l, *i)) | |
268 | continue; | |
269 | ||
270 | if (strv_extend(&l, *i) < 0) | |
271 | return -ENOMEM; | |
272 | ||
273 | added = true; | |
274 | } | |
275 | ||
276 | if (added) { | |
277 | struct group t; | |
278 | ||
279 | strv_uniq(l); | |
280 | strv_sort(l); | |
281 | ||
282 | t = *gr; | |
283 | t.gr_mem = l; | |
284 | ||
285 | errno = 0; | |
286 | if (putgrent(&t, group) != 0) | |
287 | return errno ? -errno : -EIO; | |
288 | ||
289 | return 1; | |
290 | } | |
291 | } | |
292 | ||
293 | errno = 0; | |
294 | if (putgrent(gr, group) != 0) | |
295 | return errno ? -errno : -EIO; | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
1b992147 LP |
300 | static int write_files(void) { |
301 | ||
302 | _cleanup_fclose_ FILE *passwd = NULL, *group = NULL; | |
303 | _cleanup_free_ char *passwd_tmp = NULL, *group_tmp = NULL; | |
304 | const char *passwd_path = NULL, *group_path = NULL; | |
a12b0cc3 | 305 | bool group_changed = false; |
1b992147 LP |
306 | Iterator iterator; |
307 | Item *i; | |
308 | int r; | |
309 | ||
310 | /* We don't patch /etc/shadow or /etc/gshadow here, since we | |
311 | * only create user accounts without passwords anyway. */ | |
312 | ||
a12b0cc3 | 313 | if (hashmap_size(todo_gids) > 0 || hashmap_size(members) > 0) { |
1b992147 LP |
314 | _cleanup_fclose_ FILE *original = NULL; |
315 | ||
316 | group_path = fix_root("/etc/group"); | |
f7f628b5 | 317 | r = fopen_temporary_label("/etc/group", group_path, &group, &group_tmp); |
1b992147 LP |
318 | if (r < 0) |
319 | goto finish; | |
320 | ||
321 | if (fchmod(fileno(group), 0644) < 0) { | |
322 | r = -errno; | |
323 | goto finish; | |
324 | } | |
325 | ||
326 | original = fopen(group_path, "re"); | |
327 | if (original) { | |
328 | struct group *gr; | |
329 | ||
330 | errno = 0; | |
331 | while ((gr = fgetgrent(original))) { | |
332 | /* Safety checks against name and GID | |
333 | * collisions. Normally, this should | |
334 | * be unnecessary, but given that we | |
335 | * look at the entries anyway here, | |
336 | * let's make an extra verification | |
337 | * step that we don't generate | |
338 | * duplicate entries. */ | |
339 | ||
340 | i = hashmap_get(groups, gr->gr_name); | |
c1b6b04f | 341 | if (i && i->todo_group) { |
1b992147 LP |
342 | r = -EEXIST; |
343 | goto finish; | |
344 | } | |
345 | ||
346 | if (hashmap_contains(todo_gids, GID_TO_PTR(gr->gr_gid))) { | |
347 | r = -EEXIST; | |
348 | goto finish; | |
349 | } | |
350 | ||
a12b0cc3 LP |
351 | r = putgrent_with_members(gr, group); |
352 | if (r < 0) | |
1b992147 | 353 | goto finish; |
a12b0cc3 LP |
354 | |
355 | if (r > 0) | |
356 | group_changed = true; | |
1b992147 LP |
357 | |
358 | errno = 0; | |
359 | } | |
360 | if (!IN_SET(errno, 0, ENOENT)) { | |
361 | r = -errno; | |
362 | goto finish; | |
363 | } | |
364 | ||
365 | } else if (errno != ENOENT) { | |
366 | r = -errno; | |
367 | goto finish; | |
368 | } | |
369 | ||
370 | HASHMAP_FOREACH(i, todo_gids, iterator) { | |
371 | struct group n = { | |
372 | .gr_name = i->name, | |
373 | .gr_gid = i->gid, | |
374 | .gr_passwd = (char*) "x", | |
375 | }; | |
376 | ||
a12b0cc3 LP |
377 | r = putgrent_with_members(&n, group); |
378 | if (r < 0) | |
1b992147 | 379 | goto finish; |
a12b0cc3 LP |
380 | |
381 | group_changed = true; | |
1b992147 LP |
382 | } |
383 | ||
384 | r = fflush_and_check(group); | |
385 | if (r < 0) | |
386 | goto finish; | |
387 | } | |
388 | ||
389 | if (hashmap_size(todo_uids) > 0) { | |
390 | _cleanup_fclose_ FILE *original = NULL; | |
391 | ||
392 | passwd_path = fix_root("/etc/passwd"); | |
f7f628b5 | 393 | r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp); |
1b992147 LP |
394 | if (r < 0) |
395 | goto finish; | |
396 | ||
397 | if (fchmod(fileno(passwd), 0644) < 0) { | |
398 | r = -errno; | |
399 | goto finish; | |
400 | } | |
401 | ||
402 | original = fopen(passwd_path, "re"); | |
403 | if (original) { | |
404 | struct passwd *pw; | |
405 | ||
406 | errno = 0; | |
407 | while ((pw = fgetpwent(original))) { | |
408 | ||
409 | i = hashmap_get(users, pw->pw_name); | |
c1b6b04f | 410 | if (i && i->todo_user) { |
1b992147 LP |
411 | r = -EEXIST; |
412 | goto finish; | |
413 | } | |
414 | ||
415 | if (hashmap_contains(todo_uids, UID_TO_PTR(pw->pw_uid))) { | |
416 | r = -EEXIST; | |
417 | goto finish; | |
418 | } | |
419 | ||
a12b0cc3 | 420 | errno = 0; |
1b992147 | 421 | if (putpwent(pw, passwd) < 0) { |
a12b0cc3 | 422 | r = errno ? -errno : -EIO; |
1b992147 LP |
423 | goto finish; |
424 | } | |
425 | ||
426 | errno = 0; | |
427 | } | |
428 | if (!IN_SET(errno, 0, ENOENT)) { | |
429 | r = -errno; | |
430 | goto finish; | |
431 | } | |
432 | ||
433 | } else if (errno != ENOENT) { | |
434 | r = -errno; | |
435 | goto finish; | |
436 | } | |
437 | ||
438 | HASHMAP_FOREACH(i, todo_uids, iterator) { | |
439 | struct passwd n = { | |
440 | .pw_name = i->name, | |
441 | .pw_uid = i->uid, | |
442 | .pw_gid = i->gid, | |
443 | .pw_gecos = i->description, | |
444 | .pw_passwd = (char*) "x", | |
445 | }; | |
446 | ||
447 | /* Initialize the home directory and the shell | |
448 | * to nologin, with one exception: for root we | |
449 | * patch in something special */ | |
450 | if (i->uid == 0) { | |
451 | n.pw_shell = (char*) "/bin/sh"; | |
452 | n.pw_dir = (char*) "/root"; | |
453 | } else { | |
454 | n.pw_shell = (char*) "/sbin/nologin"; | |
455 | n.pw_dir = (char*) "/"; | |
456 | } | |
457 | ||
a12b0cc3 LP |
458 | errno = 0; |
459 | if (putpwent(&n, passwd) != 0) { | |
460 | r = errno ? -errno : -EIO; | |
1b992147 LP |
461 | goto finish; |
462 | } | |
463 | } | |
464 | ||
465 | r = fflush_and_check(passwd); | |
466 | if (r < 0) | |
467 | goto finish; | |
468 | } | |
469 | ||
470 | /* Make a backup of the old files */ | |
a12b0cc3 | 471 | if (group && group_changed) { |
1b992147 LP |
472 | r = make_backup(group_path); |
473 | if (r < 0) | |
474 | goto finish; | |
475 | } | |
476 | ||
477 | if (passwd) { | |
478 | r = make_backup(passwd_path); | |
479 | if (r < 0) | |
480 | goto finish; | |
481 | } | |
482 | ||
483 | /* And make the new files count */ | |
a12b0cc3 | 484 | if (group && group_changed) { |
1b992147 LP |
485 | if (rename(group_tmp, group_path) < 0) { |
486 | r = -errno; | |
487 | goto finish; | |
488 | } | |
489 | ||
490 | free(group_tmp); | |
491 | group_tmp = NULL; | |
492 | } | |
493 | ||
494 | if (passwd) { | |
495 | if (rename(passwd_tmp, passwd_path) < 0) { | |
496 | r = -errno; | |
497 | goto finish; | |
498 | } | |
499 | ||
500 | free(passwd_tmp); | |
501 | passwd_tmp = NULL; | |
502 | } | |
503 | ||
a12b0cc3 | 504 | r = 0; |
1b992147 LP |
505 | |
506 | finish: | |
a12b0cc3 LP |
507 | if (passwd_tmp) |
508 | unlink(passwd_tmp); | |
509 | if (group_tmp) | |
510 | unlink(group_tmp); | |
1b992147 LP |
511 | |
512 | return r; | |
513 | } | |
514 | ||
515 | static int uid_is_ok(uid_t uid, const char *name) { | |
516 | struct passwd *p; | |
517 | struct group *g; | |
518 | const char *n; | |
519 | Item *i; | |
520 | ||
521 | /* Let's see if we already have assigned the UID a second time */ | |
522 | if (hashmap_get(todo_uids, UID_TO_PTR(uid))) | |
523 | return 0; | |
524 | ||
525 | /* Try to avoid using uids that are already used by a group | |
526 | * that doesn't have the same name as our new user. */ | |
527 | i = hashmap_get(todo_gids, GID_TO_PTR(uid)); | |
528 | if (i && !streq(i->name, name)) | |
529 | return 0; | |
530 | ||
531 | /* Let's check the files directly */ | |
532 | if (hashmap_contains(database_uid, UID_TO_PTR(uid))) | |
533 | return 0; | |
534 | ||
535 | n = hashmap_get(database_gid, GID_TO_PTR(uid)); | |
536 | if (n && !streq(n, name)) | |
537 | return 0; | |
538 | ||
539 | /* Let's also check via NSS, to avoid UID clashes over LDAP and such, just in case */ | |
540 | if (!arg_root) { | |
541 | errno = 0; | |
542 | p = getpwuid(uid); | |
543 | if (p) | |
544 | return 0; | |
b0284aba | 545 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
546 | return -errno; |
547 | ||
548 | errno = 0; | |
549 | g = getgrgid((gid_t) uid); | |
550 | if (g) { | |
551 | if (!streq(g->gr_name, name)) | |
552 | return 0; | |
b0284aba | 553 | } else if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
554 | return -errno; |
555 | } | |
556 | ||
557 | return 1; | |
558 | } | |
559 | ||
560 | static int root_stat(const char *p, struct stat *st) { | |
561 | const char *fix; | |
562 | ||
563 | fix = fix_root(p); | |
564 | if (stat(fix, st) < 0) | |
565 | return -errno; | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | static int read_id_from_file(Item *i, uid_t *_uid, gid_t *_gid) { | |
571 | struct stat st; | |
572 | bool found_uid = false, found_gid = false; | |
573 | uid_t uid; | |
574 | gid_t gid; | |
575 | ||
576 | assert(i); | |
577 | ||
578 | /* First, try to get the gid directly */ | |
579 | if (_gid && i->gid_path && root_stat(i->gid_path, &st) >= 0) { | |
580 | gid = st.st_gid; | |
581 | found_gid = true; | |
582 | } | |
583 | ||
584 | /* Then, try to get the uid directly */ | |
585 | if ((_uid || (_gid && !found_gid)) | |
586 | && i->uid_path | |
587 | && root_stat(i->uid_path, &st) >= 0) { | |
588 | ||
589 | uid = st.st_uid; | |
590 | found_uid = true; | |
591 | ||
592 | /* If we need the gid, but had no success yet, also derive it from the uid path */ | |
593 | if (_gid && !found_gid) { | |
594 | gid = st.st_gid; | |
595 | found_gid = true; | |
596 | } | |
597 | } | |
598 | ||
599 | /* If that didn't work yet, then let's reuse the gid as uid */ | |
600 | if (_uid && !found_uid && i->gid_path) { | |
601 | ||
602 | if (found_gid) { | |
603 | uid = (uid_t) gid; | |
604 | found_uid = true; | |
605 | } else if (root_stat(i->gid_path, &st) >= 0) { | |
606 | uid = (uid_t) st.st_gid; | |
607 | found_uid = true; | |
608 | } | |
609 | } | |
610 | ||
611 | if (_uid) { | |
612 | if (!found_uid) | |
613 | return 0; | |
614 | ||
615 | *_uid = uid; | |
616 | } | |
617 | ||
618 | if (_gid) { | |
619 | if (!found_gid) | |
620 | return 0; | |
621 | ||
622 | *_gid = gid; | |
623 | } | |
624 | ||
625 | return 1; | |
626 | } | |
627 | ||
628 | static int add_user(Item *i) { | |
629 | void *z; | |
630 | int r; | |
631 | ||
632 | assert(i); | |
633 | ||
634 | /* Check the database directly */ | |
635 | z = hashmap_get(database_user, i->name); | |
636 | if (z) { | |
637 | log_debug("User %s already exists.", i->name); | |
c1b6b04f | 638 | i->uid = PTR_TO_UID(z); |
1b992147 LP |
639 | i->uid_set = true; |
640 | return 0; | |
641 | } | |
642 | ||
643 | if (!arg_root) { | |
644 | struct passwd *p; | |
645 | struct spwd *sp; | |
646 | ||
647 | /* Also check NSS */ | |
648 | errno = 0; | |
649 | p = getpwnam(i->name); | |
650 | if (p) { | |
651 | log_debug("User %s already exists.", i->name); | |
652 | i->uid = p->pw_uid; | |
653 | i->uid_set = true; | |
654 | ||
655 | free(i->description); | |
656 | i->description = strdup(p->pw_gecos); | |
657 | return 0; | |
658 | } | |
b0284aba | 659 | if (!IN_SET(errno, 0, ENOENT)) { |
1b992147 LP |
660 | log_error("Failed to check if user %s already exists: %m", i->name); |
661 | return -errno; | |
662 | } | |
663 | ||
664 | /* And shadow too, just to be sure */ | |
665 | errno = 0; | |
666 | sp = getspnam(i->name); | |
667 | if (sp) { | |
668 | log_error("User %s already exists in shadow database, but not in user database.", i->name); | |
669 | return -EBADMSG; | |
670 | } | |
b0284aba | 671 | if (!IN_SET(errno, 0, ENOENT)) { |
1b992147 LP |
672 | log_error("Failed to check if user %s already exists in shadow database: %m", i->name); |
673 | return -errno; | |
674 | } | |
675 | } | |
676 | ||
677 | /* Try to use the suggested numeric uid */ | |
678 | if (i->uid_set) { | |
679 | r = uid_is_ok(i->uid, i->name); | |
680 | if (r < 0) { | |
681 | log_error("Failed to verify uid " UID_FMT ": %s", i->uid, strerror(-r)); | |
682 | return r; | |
683 | } | |
684 | if (r == 0) { | |
685 | log_debug("Suggested user ID " UID_FMT " for %s already used.", i->uid, i->name); | |
686 | i->uid_set = false; | |
687 | } | |
688 | } | |
689 | ||
690 | /* If that didn't work, try to read it from the specified path */ | |
691 | if (!i->uid_set) { | |
692 | uid_t c; | |
693 | ||
694 | if (read_id_from_file(i, &c, NULL) > 0) { | |
695 | ||
696 | if (c <= 0 || c > SYSTEM_UID_MAX) | |
697 | log_debug("User ID " UID_FMT " of file not suitable for %s.", c, i->name); | |
698 | else { | |
699 | r = uid_is_ok(c, i->name); | |
700 | if (r < 0) { | |
701 | log_error("Failed to verify uid " UID_FMT ": %s", i->uid, strerror(-r)); | |
702 | return r; | |
703 | } else if (r > 0) { | |
704 | i->uid = c; | |
705 | i->uid_set = true; | |
706 | } else | |
707 | log_debug("User ID " UID_FMT " of file for %s is already used.", c, i->name); | |
708 | } | |
709 | } | |
710 | } | |
711 | ||
712 | /* Otherwise try to reuse the group ID */ | |
713 | if (!i->uid_set && i->gid_set) { | |
714 | r = uid_is_ok((uid_t) i->gid, i->name); | |
715 | if (r < 0) { | |
716 | log_error("Failed to verify uid " UID_FMT ": %s", i->uid, strerror(-r)); | |
717 | return r; | |
718 | } | |
719 | if (r > 0) { | |
720 | i->uid = (uid_t) i->gid; | |
721 | i->uid_set = true; | |
722 | } | |
723 | } | |
724 | ||
725 | /* And if that didn't work either, let's try to find a free one */ | |
726 | if (!i->uid_set) { | |
727 | for (; search_uid > 0; search_uid--) { | |
728 | ||
729 | r = uid_is_ok(search_uid, i->name); | |
730 | if (r < 0) { | |
731 | log_error("Failed to verify uid " UID_FMT ": %s", i->uid, strerror(-r)); | |
732 | return r; | |
733 | } else if (r > 0) | |
734 | break; | |
735 | } | |
736 | ||
737 | if (search_uid <= 0) { | |
738 | log_error("No free user ID available for %s.", i->name); | |
739 | return -E2BIG; | |
740 | } | |
741 | ||
742 | i->uid_set = true; | |
743 | i->uid = search_uid; | |
744 | ||
745 | search_uid--; | |
746 | } | |
747 | ||
748 | r = hashmap_ensure_allocated(&todo_uids, trivial_hash_func, trivial_compare_func); | |
749 | if (r < 0) | |
750 | return log_oom(); | |
751 | ||
752 | r = hashmap_put(todo_uids, UID_TO_PTR(i->uid), i); | |
753 | if (r < 0) | |
754 | return log_oom(); | |
755 | ||
c1b6b04f | 756 | i->todo_user = true; |
1b992147 LP |
757 | log_info("Creating user %s (%s) with uid " UID_FMT " and gid " GID_FMT ".", i->name, strna(i->description), i->uid, i->gid); |
758 | ||
759 | return 0; | |
760 | } | |
761 | ||
762 | static int gid_is_ok(gid_t gid) { | |
763 | struct group *g; | |
764 | struct passwd *p; | |
765 | ||
766 | if (hashmap_get(todo_gids, GID_TO_PTR(gid))) | |
767 | return 0; | |
768 | ||
769 | /* Avoid reusing gids that are already used by a different user */ | |
770 | if (hashmap_get(todo_uids, UID_TO_PTR(gid))) | |
771 | return 0; | |
772 | ||
773 | if (hashmap_contains(database_gid, GID_TO_PTR(gid))) | |
774 | return 0; | |
775 | ||
776 | if (hashmap_contains(database_uid, UID_TO_PTR(gid))) | |
777 | return 0; | |
778 | ||
779 | if (!arg_root) { | |
780 | errno = 0; | |
781 | g = getgrgid(gid); | |
782 | if (g) | |
783 | return 0; | |
b0284aba | 784 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
785 | return -errno; |
786 | ||
787 | errno = 0; | |
788 | p = getpwuid((uid_t) gid); | |
789 | if (p) | |
790 | return 0; | |
b0284aba | 791 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
792 | return -errno; |
793 | } | |
794 | ||
795 | return 1; | |
796 | } | |
797 | ||
798 | static int add_group(Item *i) { | |
799 | void *z; | |
800 | int r; | |
801 | ||
802 | assert(i); | |
803 | ||
804 | /* Check the database directly */ | |
805 | z = hashmap_get(database_group, i->name); | |
806 | if (z) { | |
807 | log_debug("Group %s already exists.", i->name); | |
808 | i->gid = PTR_TO_GID(z); | |
809 | i->gid_set = true; | |
810 | return 0; | |
811 | } | |
812 | ||
813 | /* Also check NSS */ | |
814 | if (!arg_root) { | |
815 | struct group *g; | |
816 | ||
817 | errno = 0; | |
818 | g = getgrnam(i->name); | |
819 | if (g) { | |
820 | log_debug("Group %s already exists.", i->name); | |
821 | i->gid = g->gr_gid; | |
822 | i->gid_set = true; | |
823 | return 0; | |
824 | } | |
b0284aba | 825 | if (!IN_SET(errno, 0, ENOENT)) { |
1b992147 LP |
826 | log_error("Failed to check if group %s already exists: %m", i->name); |
827 | return -errno; | |
828 | } | |
829 | } | |
830 | ||
831 | /* Try to use the suggested numeric gid */ | |
832 | if (i->gid_set) { | |
833 | r = gid_is_ok(i->gid); | |
834 | if (r < 0) { | |
835 | log_error("Failed to verify gid " GID_FMT ": %s", i->gid, strerror(-r)); | |
836 | return r; | |
837 | } | |
838 | if (r == 0) { | |
839 | log_debug("Suggested group ID " GID_FMT " for %s already used.", i->gid, i->name); | |
840 | i->gid_set = false; | |
841 | } | |
842 | } | |
843 | ||
844 | /* Try to reuse the numeric uid, if there's one */ | |
845 | if (!i->gid_set && i->uid_set) { | |
846 | r = gid_is_ok((gid_t) i->uid); | |
847 | if (r < 0) { | |
848 | log_error("Failed to verify gid " GID_FMT ": %s", i->gid, strerror(-r)); | |
849 | return r; | |
850 | } | |
851 | if (r > 0) { | |
852 | i->gid = (gid_t) i->uid; | |
853 | i->gid_set = true; | |
854 | } | |
855 | } | |
856 | ||
857 | /* If that didn't work, try to read it from the specified path */ | |
858 | if (!i->gid_set) { | |
859 | gid_t c; | |
860 | ||
861 | if (read_id_from_file(i, NULL, &c) > 0) { | |
862 | ||
863 | if (c <= 0 || c > SYSTEM_GID_MAX) | |
864 | log_debug("Group ID " GID_FMT " of file not suitable for %s.", c, i->name); | |
865 | else { | |
866 | r = gid_is_ok(c); | |
867 | if (r < 0) { | |
868 | log_error("Failed to verify gid " GID_FMT ": %s", i->gid, strerror(-r)); | |
869 | return r; | |
870 | } else if (r > 0) { | |
871 | i->gid = c; | |
872 | i->gid_set = true; | |
873 | } else | |
874 | log_debug("Group ID " GID_FMT " of file for %s already used.", c, i->name); | |
875 | } | |
876 | } | |
877 | } | |
878 | ||
879 | /* And if that didn't work either, let's try to find a free one */ | |
880 | if (!i->gid_set) { | |
881 | for (; search_gid > 0; search_gid--) { | |
882 | r = gid_is_ok(search_gid); | |
883 | if (r < 0) { | |
884 | log_error("Failed to verify gid " GID_FMT ": %s", i->gid, strerror(-r)); | |
885 | return r; | |
886 | } else if (r > 0) | |
887 | break; | |
888 | } | |
889 | ||
890 | if (search_gid <= 0) { | |
891 | log_error("No free group ID available for %s.", i->name); | |
892 | return -E2BIG; | |
893 | } | |
894 | ||
895 | i->gid_set = true; | |
896 | i->gid = search_gid; | |
897 | ||
898 | search_gid--; | |
899 | } | |
900 | ||
901 | r = hashmap_ensure_allocated(&todo_gids, trivial_hash_func, trivial_compare_func); | |
902 | if (r < 0) | |
903 | return log_oom(); | |
904 | ||
905 | r = hashmap_put(todo_gids, GID_TO_PTR(i->gid), i); | |
906 | if (r < 0) | |
907 | return log_oom(); | |
908 | ||
c1b6b04f | 909 | i->todo_group = true; |
1b992147 LP |
910 | log_info("Creating group %s with gid " GID_FMT ".", i->name, i->gid); |
911 | ||
912 | return 0; | |
913 | } | |
914 | ||
915 | static int process_item(Item *i) { | |
916 | int r; | |
917 | ||
918 | assert(i); | |
919 | ||
920 | switch (i->type) { | |
921 | ||
922 | case ADD_USER: | |
923 | r = add_group(i); | |
924 | if (r < 0) | |
925 | return r; | |
926 | ||
927 | return add_user(i); | |
928 | ||
929 | case ADD_GROUP: { | |
930 | Item *j; | |
931 | ||
932 | j = hashmap_get(users, i->name); | |
933 | if (j) { | |
934 | /* There's already user to be created for this | |
935 | * name, let's process that in one step */ | |
936 | ||
937 | if (i->gid_set) { | |
938 | j->gid = i->gid; | |
939 | j->gid_set = true; | |
940 | } | |
941 | ||
942 | if (i->gid_path) { | |
943 | free(j->gid_path); | |
944 | j->gid_path = strdup(i->gid_path); | |
945 | if (!j->gid_path) | |
946 | return log_oom(); | |
947 | } | |
948 | ||
949 | return 0; | |
950 | } | |
951 | ||
952 | return add_group(i); | |
953 | } | |
1b992147 | 954 | |
a12b0cc3 LP |
955 | default: |
956 | assert_not_reached("Unknown item type"); | |
957 | } | |
1b992147 LP |
958 | } |
959 | ||
960 | static void item_free(Item *i) { | |
961 | ||
962 | if (!i) | |
963 | return; | |
964 | ||
965 | free(i->name); | |
966 | free(i->uid_path); | |
967 | free(i->gid_path); | |
968 | free(i->description); | |
969 | free(i); | |
970 | } | |
971 | ||
972 | DEFINE_TRIVIAL_CLEANUP_FUNC(Item*, item_free); | |
973 | ||
a12b0cc3 LP |
974 | static int add_implicit(void) { |
975 | char *g, **l; | |
976 | Iterator iterator; | |
977 | int r; | |
978 | ||
979 | /* Implicitly create additional users and groups, if they were listed in "m" lines */ | |
980 | ||
981 | HASHMAP_FOREACH_KEY(l, g, members, iterator) { | |
982 | Item *i; | |
983 | char **m; | |
984 | ||
985 | i = hashmap_get(groups, g); | |
986 | if (!i) { | |
987 | _cleanup_(item_freep) Item *j = NULL; | |
988 | ||
989 | r = hashmap_ensure_allocated(&groups, string_hash_func, string_compare_func); | |
990 | if (r < 0) | |
991 | return log_oom(); | |
992 | ||
993 | j = new0(Item, 1); | |
994 | if (!j) | |
995 | return log_oom(); | |
996 | ||
997 | j->type = ADD_GROUP; | |
998 | j->name = strdup(g); | |
999 | if (!j->name) | |
1000 | return log_oom(); | |
1001 | ||
1002 | r = hashmap_put(groups, j->name, j); | |
1003 | if (r < 0) | |
1004 | return log_oom(); | |
1005 | ||
1006 | log_debug("Adding implicit group '%s' due to m line", j->name); | |
1007 | j = NULL; | |
1008 | } | |
1009 | ||
1010 | STRV_FOREACH(m, l) { | |
1011 | ||
1012 | i = hashmap_get(users, *m); | |
1013 | if (!i) { | |
1014 | _cleanup_(item_freep) Item *j = NULL; | |
1015 | ||
1016 | r = hashmap_ensure_allocated(&users, string_hash_func, string_compare_func); | |
1017 | if (r < 0) | |
1018 | return log_oom(); | |
1019 | ||
1020 | j = new0(Item, 1); | |
1021 | if (!j) | |
1022 | return log_oom(); | |
1023 | ||
1024 | j->type = ADD_USER; | |
1025 | j->name = strdup(*m); | |
1026 | if (!j->name) | |
1027 | return log_oom(); | |
1028 | ||
1029 | r = hashmap_put(users, j->name, j); | |
1030 | if (r < 0) | |
1031 | return log_oom(); | |
1032 | ||
1033 | log_debug("Adding implicit user '%s' due to m line", j->name); | |
1034 | j = NULL; | |
1035 | } | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | return 0; | |
1040 | } | |
1041 | ||
1b992147 LP |
1042 | static bool item_equal(Item *a, Item *b) { |
1043 | assert(a); | |
1044 | assert(b); | |
1045 | ||
1046 | if (a->type != b->type) | |
1047 | return false; | |
1048 | ||
1049 | if (!streq_ptr(a->name, b->name)) | |
1050 | return false; | |
1051 | ||
1052 | if (!streq_ptr(a->uid_path, b->uid_path)) | |
1053 | return false; | |
1054 | ||
1055 | if (!streq_ptr(a->gid_path, b->gid_path)) | |
1056 | return false; | |
1057 | ||
1058 | if (!streq_ptr(a->description, b->description)) | |
1059 | return false; | |
1060 | ||
1061 | if (a->uid_set != b->uid_set) | |
1062 | return false; | |
1063 | ||
1064 | if (a->uid_set && a->uid != b->uid) | |
1065 | return false; | |
1066 | ||
1067 | if (a->gid_set != b->gid_set) | |
1068 | return false; | |
1069 | ||
1070 | if (a->gid_set && a->gid != b->gid) | |
1071 | return false; | |
1072 | ||
1073 | return true; | |
1074 | } | |
1075 | ||
1076 | static bool valid_user_group_name(const char *u) { | |
1077 | const char *i; | |
1078 | long sz; | |
1079 | ||
1080 | if (isempty(u) < 0) | |
1081 | return false; | |
1082 | ||
1083 | if (!(u[0] >= 'a' && u[0] <= 'z') && | |
1084 | !(u[0] >= 'A' && u[0] <= 'Z') && | |
1085 | u[0] != '_') | |
1086 | return false; | |
1087 | ||
1088 | for (i = u+1; *i; i++) { | |
1089 | if (!(*i >= 'a' && *i <= 'z') && | |
1090 | !(*i >= 'A' && *i <= 'Z') && | |
1091 | !(*i >= '0' && *i <= '9') && | |
1092 | *i != '_' && | |
1093 | *i != '-') | |
1094 | return false; | |
1095 | } | |
1096 | ||
1097 | sz = sysconf(_SC_LOGIN_NAME_MAX); | |
1098 | assert_se(sz > 0); | |
1099 | ||
1100 | if ((size_t) (i-u) > (size_t) sz) | |
1101 | return false; | |
1102 | ||
932ad62b LP |
1103 | if ((size_t) (i-u) > UT_NAMESIZE - 1) |
1104 | return false; | |
1105 | ||
1b992147 LP |
1106 | return true; |
1107 | } | |
1108 | ||
1109 | static bool valid_gecos(const char *d) { | |
1110 | ||
1111 | if (!utf8_is_valid(d)) | |
1112 | return false; | |
1113 | ||
38c74dad LP |
1114 | if (string_has_cc(d, NULL)) |
1115 | return false; | |
1116 | ||
1117 | /* Colons are used as field separators, and hence not OK */ | |
1118 | if (strchr(d, ':')) | |
1b992147 LP |
1119 | return false; |
1120 | ||
1121 | return true; | |
1122 | } | |
1123 | ||
1124 | static int parse_line(const char *fname, unsigned line, const char *buffer) { | |
1125 | ||
1126 | static const Specifier specifier_table[] = { | |
1127 | { 'm', specifier_machine_id, NULL }, | |
1128 | { 'b', specifier_boot_id, NULL }, | |
1129 | { 'H', specifier_host_name, NULL }, | |
1130 | { 'v', specifier_kernel_release, NULL }, | |
1131 | {} | |
1132 | }; | |
1133 | ||
a12b0cc3 | 1134 | _cleanup_free_ char *action = NULL, *name = NULL, *id = NULL, *resolved_name = NULL; |
1b992147 LP |
1135 | _cleanup_(item_freep) Item *i = NULL; |
1136 | Item *existing; | |
1137 | Hashmap *h; | |
1138 | int r, n = -1; | |
1139 | ||
1140 | assert(fname); | |
1141 | assert(line >= 1); | |
1142 | assert(buffer); | |
1143 | ||
1144 | r = sscanf(buffer, | |
1145 | "%ms %ms %ms %n", | |
1146 | &action, | |
1147 | &name, | |
1148 | &id, | |
1149 | &n); | |
1150 | if (r < 2) { | |
1151 | log_error("[%s:%u] Syntax error.", fname, line); | |
1152 | return -EIO; | |
1153 | } | |
1154 | ||
1155 | if (strlen(action) != 1) { | |
1156 | log_error("[%s:%u] Unknown modifier '%s'", fname, line, action); | |
1157 | return -EINVAL; | |
1158 | } | |
1159 | ||
a12b0cc3 | 1160 | if (!IN_SET(action[0], ADD_USER, ADD_GROUP, ADD_MEMBER)) { |
1b992147 LP |
1161 | log_error("[%s:%u] Unknown command command type '%c'.", fname, line, action[0]); |
1162 | return -EBADMSG; | |
1163 | } | |
1164 | ||
a12b0cc3 | 1165 | r = specifier_printf(name, specifier_table, NULL, &resolved_name); |
1b992147 LP |
1166 | if (r < 0) { |
1167 | log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, name); | |
1168 | return r; | |
1169 | } | |
1170 | ||
a12b0cc3 LP |
1171 | if (!valid_user_group_name(resolved_name)) { |
1172 | log_error("[%s:%u] '%s' is not a valid user or group name.", fname, line, resolved_name); | |
1b992147 LP |
1173 | return -EINVAL; |
1174 | } | |
1175 | ||
1176 | if (n >= 0) { | |
1177 | n += strspn(buffer+n, WHITESPACE); | |
1b992147 | 1178 | |
a12b0cc3 LP |
1179 | if (STR_IN_SET(buffer + n, "", "-")) |
1180 | n = -1; | |
1b992147 LP |
1181 | } |
1182 | ||
a12b0cc3 | 1183 | switch (action[0]) { |
1b992147 | 1184 | |
a12b0cc3 LP |
1185 | case ADD_MEMBER: { |
1186 | _cleanup_free_ char *resolved_id = NULL; | |
1187 | char **l; | |
1b992147 | 1188 | |
a12b0cc3 LP |
1189 | r = hashmap_ensure_allocated(&members, string_hash_func, string_compare_func); |
1190 | if (r < 0) | |
1191 | return log_oom(); | |
1b992147 | 1192 | |
a12b0cc3 | 1193 | /* Try to extend an existing member or group item */ |
1b992147 | 1194 | |
a12b0cc3 LP |
1195 | if (!id || streq(id, "-")) { |
1196 | log_error("[%s:%u] Lines of type 'm' require a group name in the third field.", fname, line); | |
1197 | return -EINVAL; | |
1198 | } | |
1b992147 | 1199 | |
a12b0cc3 LP |
1200 | r = specifier_printf(id, specifier_table, NULL, &resolved_id); |
1201 | if (r < 0) { | |
1202 | log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, name); | |
1203 | return r; | |
1204 | } | |
1b992147 | 1205 | |
a12b0cc3 LP |
1206 | if (!valid_user_group_name(resolved_id)) { |
1207 | log_error("[%s:%u] '%s' is not a valid user or group name.", fname, line, resolved_id); | |
1208 | return -EINVAL; | |
1209 | } | |
1b992147 | 1210 | |
a12b0cc3 LP |
1211 | if (n >= 0) { |
1212 | log_error("[%s:%u] Lines of type 'm' don't take a GECOS field.", fname, line); | |
1213 | return -EINVAL; | |
1214 | } | |
1215 | ||
1216 | l = hashmap_get(members, resolved_id); | |
1217 | if (l) { | |
1218 | /* A list for this group name already exists, let's append to it */ | |
1219 | r = strv_push(&l, resolved_name); | |
1220 | if (r < 0) | |
1221 | return log_oom(); | |
1222 | ||
1223 | resolved_name = NULL; | |
1224 | ||
1225 | assert_se(hashmap_update(members, resolved_id, l) >= 0); | |
1b992147 | 1226 | } else { |
a12b0cc3 LP |
1227 | /* No list for this group name exists yet, create one */ |
1228 | ||
1229 | l = new0(char *, 2); | |
1230 | if (!l) | |
1231 | return -ENOMEM; | |
1232 | ||
1233 | l[0] = resolved_name; | |
1234 | l[1] = NULL; | |
1b992147 | 1235 | |
a12b0cc3 | 1236 | r = hashmap_put(members, resolved_id, l); |
1b992147 | 1237 | if (r < 0) { |
a12b0cc3 LP |
1238 | free(l); |
1239 | return log_oom(); | |
1b992147 LP |
1240 | } |
1241 | ||
a12b0cc3 | 1242 | resolved_id = resolved_name = NULL; |
1b992147 | 1243 | } |
a12b0cc3 LP |
1244 | |
1245 | return 0; | |
1b992147 LP |
1246 | } |
1247 | ||
a12b0cc3 | 1248 | case ADD_USER: |
1b992147 | 1249 | r = hashmap_ensure_allocated(&users, string_hash_func, string_compare_func); |
a12b0cc3 LP |
1250 | if (r < 0) |
1251 | return log_oom(); | |
1252 | ||
1253 | i = new0(Item, 1); | |
1254 | if (!i) | |
1255 | return log_oom(); | |
1256 | ||
1257 | if (id && !streq(id, "-")) { | |
1258 | ||
1259 | if (path_is_absolute(id)) { | |
1260 | i->uid_path = strdup(id); | |
1261 | if (!i->uid_path) | |
1262 | return log_oom(); | |
1263 | ||
1264 | path_kill_slashes(i->uid_path); | |
1265 | ||
1266 | } else { | |
1267 | r = parse_uid(id, &i->uid); | |
1268 | if (r < 0) { | |
1269 | log_error("Failed to parse UID: %s", id); | |
1270 | return -EBADMSG; | |
1271 | } | |
1272 | ||
1273 | i->uid_set = true; | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | if (n >= 0) { | |
1278 | i->description = unquote(buffer+n, "\""); | |
1279 | if (!i->description) | |
1280 | return log_oom(); | |
1281 | ||
1282 | if (!valid_gecos(i->description)) { | |
1283 | log_error("[%s:%u] '%s' is not a valid GECOS field.", fname, line, i->description); | |
1284 | return -EINVAL; | |
1285 | } | |
1286 | } | |
1287 | ||
1b992147 | 1288 | h = users; |
a12b0cc3 LP |
1289 | break; |
1290 | ||
1291 | case ADD_GROUP: | |
1b992147 | 1292 | r = hashmap_ensure_allocated(&groups, string_hash_func, string_compare_func); |
a12b0cc3 LP |
1293 | if (r < 0) |
1294 | return log_oom(); | |
1295 | ||
1296 | if (n >= 0) { | |
1297 | log_error("[%s:%u] Lines of type 'g' don't take a GECOS field.", fname, line); | |
1298 | return -EINVAL; | |
1299 | } | |
1300 | ||
1301 | i = new0(Item, 1); | |
1302 | if (!i) | |
1303 | return log_oom(); | |
1304 | ||
1305 | if (id && !streq(id, "-")) { | |
1306 | ||
1307 | if (path_is_absolute(id)) { | |
1308 | i->gid_path = strdup(id); | |
1309 | if (!i->gid_path) | |
1310 | return log_oom(); | |
1311 | ||
1312 | path_kill_slashes(i->gid_path); | |
1313 | } else { | |
1314 | r = parse_gid(id, &i->gid); | |
1315 | if (r < 0) { | |
1316 | log_error("Failed to parse GID: %s", id); | |
1317 | return -EBADMSG; | |
1318 | } | |
1319 | ||
1320 | i->gid_set = true; | |
1321 | } | |
1322 | } | |
1323 | ||
1324 | ||
1b992147 | 1325 | h = groups; |
a12b0cc3 | 1326 | break; |
bce415ed RC |
1327 | default: |
1328 | return -EBADMSG; | |
1b992147 | 1329 | } |
a12b0cc3 LP |
1330 | |
1331 | i->type = action[0]; | |
1332 | i->name = resolved_name; | |
1333 | resolved_name = NULL; | |
1b992147 LP |
1334 | |
1335 | existing = hashmap_get(h, i->name); | |
1336 | if (existing) { | |
1337 | ||
1338 | /* Two identical items are fine */ | |
1339 | if (!item_equal(existing, i)) | |
1340 | log_warning("Two or more conflicting lines for %s configured, ignoring.", i->name); | |
1341 | ||
1342 | return 0; | |
1343 | } | |
1344 | ||
1345 | r = hashmap_put(h, i->name, i); | |
a12b0cc3 LP |
1346 | if (r < 0) |
1347 | return log_oom(); | |
1b992147 LP |
1348 | |
1349 | i = NULL; | |
1350 | return 0; | |
1351 | } | |
1352 | ||
1353 | static int read_config_file(const char *fn, bool ignore_enoent) { | |
1354 | _cleanup_fclose_ FILE *f = NULL; | |
1355 | char line[LINE_MAX]; | |
1356 | unsigned v = 0; | |
1357 | int r; | |
1358 | ||
1359 | assert(fn); | |
1360 | ||
1361 | r = search_and_fopen_nulstr(fn, "re", arg_root, conf_file_dirs, &f); | |
1362 | if (r < 0) { | |
1363 | if (ignore_enoent && r == -ENOENT) | |
1364 | return 0; | |
1365 | ||
1366 | log_error("Failed to open '%s', ignoring: %s", fn, strerror(-r)); | |
1367 | return r; | |
1368 | } | |
1369 | ||
1370 | FOREACH_LINE(line, f, break) { | |
1371 | char *l; | |
1372 | int k; | |
1373 | ||
1374 | v++; | |
1375 | ||
1376 | l = strstrip(line); | |
1377 | if (*l == '#' || *l == 0) | |
1378 | continue; | |
1379 | ||
1380 | k = parse_line(fn, v, l); | |
1381 | if (k < 0 && r == 0) | |
1382 | r = k; | |
1383 | } | |
1384 | ||
1385 | if (ferror(f)) { | |
1386 | log_error("Failed to read from file %s: %m", fn); | |
1387 | if (r == 0) | |
1388 | r = -EIO; | |
1389 | } | |
1390 | ||
1391 | return r; | |
1392 | } | |
1393 | ||
1b992147 LP |
1394 | static void free_database(Hashmap *by_name, Hashmap *by_id) { |
1395 | char *name; | |
1396 | ||
1397 | for (;;) { | |
1398 | name = hashmap_first(by_id); | |
1399 | if (!name) | |
1400 | break; | |
1401 | ||
1402 | hashmap_remove(by_name, name); | |
1403 | ||
1404 | hashmap_steal_first_key(by_id); | |
1405 | free(name); | |
1406 | } | |
1407 | ||
1408 | while ((name = hashmap_steal_first_key(by_name))) | |
1409 | free(name); | |
1410 | ||
1411 | hashmap_free(by_name); | |
1412 | hashmap_free(by_id); | |
1413 | } | |
1414 | ||
1415 | static int help(void) { | |
1416 | ||
1417 | printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" | |
1418 | "Creates system user accounts.\n\n" | |
1419 | " -h --help Show this help\n" | |
1420 | " --version Show package version\n" | |
1421 | " --root=PATH Operate on an alternate filesystem root\n", | |
1422 | program_invocation_short_name); | |
1423 | ||
1424 | return 0; | |
1425 | } | |
1426 | ||
1427 | static int parse_argv(int argc, char *argv[]) { | |
1428 | ||
1429 | enum { | |
1430 | ARG_VERSION = 0x100, | |
1431 | ARG_ROOT, | |
1432 | }; | |
1433 | ||
1434 | static const struct option options[] = { | |
1435 | { "help", no_argument, NULL, 'h' }, | |
1436 | { "version", no_argument, NULL, ARG_VERSION }, | |
1437 | { "root", required_argument, NULL, ARG_ROOT }, | |
1438 | {} | |
1439 | }; | |
1440 | ||
1441 | int c; | |
1442 | ||
1443 | assert(argc >= 0); | |
1444 | assert(argv); | |
1445 | ||
1446 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { | |
1447 | ||
1448 | switch (c) { | |
1449 | ||
1450 | case 'h': | |
1451 | return help(); | |
1452 | ||
1453 | case ARG_VERSION: | |
1454 | puts(PACKAGE_STRING); | |
1455 | puts(SYSTEMD_FEATURES); | |
1456 | return 0; | |
1457 | ||
1458 | case ARG_ROOT: | |
1459 | free(arg_root); | |
1460 | arg_root = path_make_absolute_cwd(optarg); | |
1461 | if (!arg_root) | |
1462 | return log_oom(); | |
1463 | ||
1464 | path_kill_slashes(arg_root); | |
1465 | break; | |
1466 | ||
1467 | case '?': | |
1468 | return -EINVAL; | |
1469 | ||
1470 | default: | |
1471 | assert_not_reached("Unhandled option"); | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | return 1; | |
1476 | } | |
1477 | ||
1478 | int main(int argc, char *argv[]) { | |
1479 | ||
1480 | _cleanup_close_ int lock = -1; | |
1481 | Iterator iterator; | |
1482 | int r, k; | |
1483 | Item *i; | |
a12b0cc3 | 1484 | char *n; |
1b992147 LP |
1485 | |
1486 | r = parse_argv(argc, argv); | |
1487 | if (r <= 0) | |
1488 | goto finish; | |
1489 | ||
1490 | log_set_target(LOG_TARGET_AUTO); | |
1491 | log_parse_environment(); | |
1492 | log_open(); | |
1493 | ||
1494 | umask(0022); | |
1495 | ||
a334cbba CW |
1496 | label_init(NULL); |
1497 | ||
1b992147 LP |
1498 | r = 0; |
1499 | ||
1500 | if (optind < argc) { | |
1501 | int j; | |
1502 | ||
1503 | for (j = optind; j < argc; j++) { | |
1504 | k = read_config_file(argv[j], false); | |
1505 | if (k < 0 && r == 0) | |
1506 | r = k; | |
1507 | } | |
1508 | } else { | |
1509 | _cleanup_strv_free_ char **files = NULL; | |
1510 | char **f; | |
1511 | ||
1512 | r = conf_files_list_nulstr(&files, ".conf", arg_root, conf_file_dirs); | |
1513 | if (r < 0) { | |
1514 | log_error("Failed to enumerate sysusers.d files: %s", strerror(-r)); | |
1515 | goto finish; | |
1516 | } | |
1517 | ||
1518 | STRV_FOREACH(f, files) { | |
1519 | k = read_config_file(*f, true); | |
1520 | if (k < 0 && r == 0) | |
1521 | r = k; | |
1522 | } | |
1523 | } | |
1524 | ||
a12b0cc3 LP |
1525 | r = add_implicit(); |
1526 | if (r < 0) | |
1527 | goto finish; | |
1528 | ||
45035609 | 1529 | lock = take_password_lock(arg_root); |
1b992147 LP |
1530 | if (lock < 0) { |
1531 | log_error("Failed to take lock: %s", strerror(-lock)); | |
1532 | goto finish; | |
1533 | } | |
1534 | ||
1535 | r = load_user_database(); | |
1536 | if (r < 0) { | |
1537 | log_error("Failed to load user database: %s", strerror(-r)); | |
1538 | goto finish; | |
1539 | } | |
1540 | ||
1541 | r = load_group_database(); | |
1542 | if (r < 0) { | |
1543 | log_error("Failed to read group database: %s", strerror(-r)); | |
1544 | goto finish; | |
1545 | } | |
1546 | ||
1547 | HASHMAP_FOREACH(i, groups, iterator) | |
1548 | process_item(i); | |
1549 | ||
1550 | HASHMAP_FOREACH(i, users, iterator) | |
1551 | process_item(i); | |
1552 | ||
1553 | r = write_files(); | |
1554 | if (r < 0) | |
1555 | log_error("Failed to write files: %s", strerror(-r)); | |
1556 | ||
1557 | finish: | |
1558 | while ((i = hashmap_steal_first(groups))) | |
1559 | item_free(i); | |
1560 | ||
1561 | while ((i = hashmap_steal_first(users))) | |
1562 | item_free(i); | |
1563 | ||
a12b0cc3 LP |
1564 | while ((n = hashmap_first_key(members))) { |
1565 | strv_free(hashmap_steal_first(members)); | |
1566 | free(n); | |
1567 | } | |
1568 | ||
1b992147 LP |
1569 | hashmap_free(groups); |
1570 | hashmap_free(users); | |
a12b0cc3 | 1571 | hashmap_free(members); |
1b992147 LP |
1572 | hashmap_free(todo_uids); |
1573 | hashmap_free(todo_gids); | |
1574 | ||
1575 | free_database(database_user, database_uid); | |
1576 | free_database(database_group, database_gid); | |
1577 | ||
1578 | free(arg_root); | |
1579 | ||
1580 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1581 | } |