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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 | ||
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; | |
1b992147 LP |
201 | char *backup, *temp; |
202 | struct timespec ts[2]; | |
203 | struct stat st; | |
204 | int r; | |
205 | ||
206 | src = open(x, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
207 | if (src < 0) { | |
208 | if (errno == ENOENT) /* No backup necessary... */ | |
209 | return 0; | |
210 | ||
211 | return -errno; | |
212 | } | |
213 | ||
214 | if (fstat(src, &st) < 0) | |
215 | return -errno; | |
216 | ||
9f1c1940 ZJS |
217 | r = fopen_temporary_label(target, x, &dst, &temp); |
218 | if (r < 0) | |
219 | return r; | |
1b992147 | 220 | |
9f1c1940 | 221 | r = copy_bytes(src, fileno(dst), (off_t) -1); |
1b992147 LP |
222 | if (r < 0) |
223 | goto fail; | |
224 | ||
9f1c1940 ZJS |
225 | /* Don't fail on chmod() or chown(). If it stays owned by us |
226 | * and/or unreadable by others, then it isn't too bad... */ | |
227 | ||
228 | backup = strappenda(x, "-"); | |
229 | ||
1b992147 | 230 | /* Copy over the access mask */ |
9f1c1940 ZJS |
231 | if (fchmod(fileno(dst), st.st_mode & 07777) < 0) |
232 | log_warning("Failed to change mode on %s: %m", backup); | |
1b992147 | 233 | |
9f1c1940 ZJS |
234 | if (fchown(fileno(dst), st.st_uid, st.st_gid)< 0) |
235 | log_warning("Failed to change ownership of %s: %m", backup); | |
1b992147 LP |
236 | |
237 | ts[0] = st.st_atim; | |
238 | ts[1] = st.st_mtim; | |
9f1c1940 | 239 | futimens(fileno(dst), ts); |
1b992147 | 240 | |
1b992147 LP |
241 | if (rename(temp, backup) < 0) |
242 | goto fail; | |
243 | ||
244 | return 0; | |
245 | ||
246 | fail: | |
247 | unlink(temp); | |
248 | return r; | |
249 | } | |
250 | ||
a12b0cc3 LP |
251 | static int putgrent_with_members(const struct group *gr, FILE *group) { |
252 | char **a; | |
253 | ||
254 | assert(gr); | |
255 | assert(group); | |
256 | ||
257 | a = hashmap_get(members, gr->gr_name); | |
258 | if (a) { | |
259 | _cleanup_strv_free_ char **l = NULL; | |
260 | bool added = false; | |
261 | char **i; | |
262 | ||
263 | l = strv_copy(gr->gr_mem); | |
264 | if (!l) | |
265 | return -ENOMEM; | |
266 | ||
267 | STRV_FOREACH(i, a) { | |
268 | if (strv_find(l, *i)) | |
269 | continue; | |
270 | ||
271 | if (strv_extend(&l, *i) < 0) | |
272 | return -ENOMEM; | |
273 | ||
274 | added = true; | |
275 | } | |
276 | ||
277 | if (added) { | |
278 | struct group t; | |
279 | ||
280 | strv_uniq(l); | |
281 | strv_sort(l); | |
282 | ||
283 | t = *gr; | |
284 | t.gr_mem = l; | |
285 | ||
286 | errno = 0; | |
287 | if (putgrent(&t, group) != 0) | |
288 | return errno ? -errno : -EIO; | |
289 | ||
290 | return 1; | |
291 | } | |
292 | } | |
293 | ||
294 | errno = 0; | |
295 | if (putgrent(gr, group) != 0) | |
296 | return errno ? -errno : -EIO; | |
297 | ||
298 | return 0; | |
299 | } | |
300 | ||
1b992147 LP |
301 | static int write_files(void) { |
302 | ||
303 | _cleanup_fclose_ FILE *passwd = NULL, *group = NULL; | |
304 | _cleanup_free_ char *passwd_tmp = NULL, *group_tmp = NULL; | |
305 | const char *passwd_path = NULL, *group_path = NULL; | |
a12b0cc3 | 306 | bool group_changed = false; |
1b992147 LP |
307 | Iterator iterator; |
308 | Item *i; | |
309 | int r; | |
310 | ||
311 | /* We don't patch /etc/shadow or /etc/gshadow here, since we | |
312 | * only create user accounts without passwords anyway. */ | |
313 | ||
a12b0cc3 | 314 | if (hashmap_size(todo_gids) > 0 || hashmap_size(members) > 0) { |
1b992147 LP |
315 | _cleanup_fclose_ FILE *original = NULL; |
316 | ||
317 | group_path = fix_root("/etc/group"); | |
f7f628b5 | 318 | r = fopen_temporary_label("/etc/group", group_path, &group, &group_tmp); |
1b992147 LP |
319 | if (r < 0) |
320 | goto finish; | |
321 | ||
322 | if (fchmod(fileno(group), 0644) < 0) { | |
323 | r = -errno; | |
324 | goto finish; | |
325 | } | |
326 | ||
327 | original = fopen(group_path, "re"); | |
328 | if (original) { | |
329 | struct group *gr; | |
330 | ||
331 | errno = 0; | |
332 | while ((gr = fgetgrent(original))) { | |
333 | /* Safety checks against name and GID | |
334 | * collisions. Normally, this should | |
335 | * be unnecessary, but given that we | |
336 | * look at the entries anyway here, | |
337 | * let's make an extra verification | |
338 | * step that we don't generate | |
339 | * duplicate entries. */ | |
340 | ||
341 | i = hashmap_get(groups, gr->gr_name); | |
c1b6b04f | 342 | if (i && i->todo_group) { |
1b992147 LP |
343 | r = -EEXIST; |
344 | goto finish; | |
345 | } | |
346 | ||
347 | if (hashmap_contains(todo_gids, GID_TO_PTR(gr->gr_gid))) { | |
348 | r = -EEXIST; | |
349 | goto finish; | |
350 | } | |
351 | ||
a12b0cc3 LP |
352 | r = putgrent_with_members(gr, group); |
353 | if (r < 0) | |
1b992147 | 354 | goto finish; |
a12b0cc3 LP |
355 | |
356 | if (r > 0) | |
357 | group_changed = true; | |
1b992147 LP |
358 | |
359 | errno = 0; | |
360 | } | |
361 | if (!IN_SET(errno, 0, ENOENT)) { | |
362 | r = -errno; | |
363 | goto finish; | |
364 | } | |
365 | ||
366 | } else if (errno != ENOENT) { | |
367 | r = -errno; | |
368 | goto finish; | |
369 | } | |
370 | ||
371 | HASHMAP_FOREACH(i, todo_gids, iterator) { | |
372 | struct group n = { | |
373 | .gr_name = i->name, | |
374 | .gr_gid = i->gid, | |
375 | .gr_passwd = (char*) "x", | |
376 | }; | |
377 | ||
a12b0cc3 LP |
378 | r = putgrent_with_members(&n, group); |
379 | if (r < 0) | |
1b992147 | 380 | goto finish; |
a12b0cc3 LP |
381 | |
382 | group_changed = true; | |
1b992147 LP |
383 | } |
384 | ||
385 | r = fflush_and_check(group); | |
386 | if (r < 0) | |
387 | goto finish; | |
388 | } | |
389 | ||
390 | if (hashmap_size(todo_uids) > 0) { | |
391 | _cleanup_fclose_ FILE *original = NULL; | |
392 | ||
393 | passwd_path = fix_root("/etc/passwd"); | |
f7f628b5 | 394 | r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp); |
1b992147 LP |
395 | if (r < 0) |
396 | goto finish; | |
397 | ||
398 | if (fchmod(fileno(passwd), 0644) < 0) { | |
399 | r = -errno; | |
400 | goto finish; | |
401 | } | |
402 | ||
403 | original = fopen(passwd_path, "re"); | |
404 | if (original) { | |
405 | struct passwd *pw; | |
406 | ||
407 | errno = 0; | |
408 | while ((pw = fgetpwent(original))) { | |
409 | ||
410 | i = hashmap_get(users, pw->pw_name); | |
c1b6b04f | 411 | if (i && i->todo_user) { |
1b992147 LP |
412 | r = -EEXIST; |
413 | goto finish; | |
414 | } | |
415 | ||
416 | if (hashmap_contains(todo_uids, UID_TO_PTR(pw->pw_uid))) { | |
417 | r = -EEXIST; | |
418 | goto finish; | |
419 | } | |
420 | ||
a12b0cc3 | 421 | errno = 0; |
1b992147 | 422 | if (putpwent(pw, passwd) < 0) { |
a12b0cc3 | 423 | r = errno ? -errno : -EIO; |
1b992147 LP |
424 | goto finish; |
425 | } | |
426 | ||
427 | errno = 0; | |
428 | } | |
429 | if (!IN_SET(errno, 0, ENOENT)) { | |
430 | r = -errno; | |
431 | goto finish; | |
432 | } | |
433 | ||
434 | } else if (errno != ENOENT) { | |
435 | r = -errno; | |
436 | goto finish; | |
437 | } | |
438 | ||
439 | HASHMAP_FOREACH(i, todo_uids, iterator) { | |
440 | struct passwd n = { | |
441 | .pw_name = i->name, | |
442 | .pw_uid = i->uid, | |
443 | .pw_gid = i->gid, | |
444 | .pw_gecos = i->description, | |
445 | .pw_passwd = (char*) "x", | |
446 | }; | |
447 | ||
448 | /* Initialize the home directory and the shell | |
449 | * to nologin, with one exception: for root we | |
450 | * patch in something special */ | |
451 | if (i->uid == 0) { | |
452 | n.pw_shell = (char*) "/bin/sh"; | |
453 | n.pw_dir = (char*) "/root"; | |
454 | } else { | |
455 | n.pw_shell = (char*) "/sbin/nologin"; | |
456 | n.pw_dir = (char*) "/"; | |
457 | } | |
458 | ||
a12b0cc3 LP |
459 | errno = 0; |
460 | if (putpwent(&n, passwd) != 0) { | |
461 | r = errno ? -errno : -EIO; | |
1b992147 LP |
462 | goto finish; |
463 | } | |
464 | } | |
465 | ||
466 | r = fflush_and_check(passwd); | |
467 | if (r < 0) | |
468 | goto finish; | |
469 | } | |
470 | ||
471 | /* Make a backup of the old files */ | |
a12b0cc3 | 472 | if (group && group_changed) { |
9f1c1940 | 473 | r = make_backup("/etc/group", group_path); |
1b992147 LP |
474 | if (r < 0) |
475 | goto finish; | |
476 | } | |
477 | ||
478 | if (passwd) { | |
9f1c1940 | 479 | r = make_backup("/etc/passwd", passwd_path); |
1b992147 LP |
480 | if (r < 0) |
481 | goto finish; | |
482 | } | |
483 | ||
484 | /* And make the new files count */ | |
a12b0cc3 | 485 | if (group && group_changed) { |
1b992147 LP |
486 | if (rename(group_tmp, group_path) < 0) { |
487 | r = -errno; | |
488 | goto finish; | |
489 | } | |
490 | ||
491 | free(group_tmp); | |
492 | group_tmp = NULL; | |
493 | } | |
494 | ||
495 | if (passwd) { | |
496 | if (rename(passwd_tmp, passwd_path) < 0) { | |
497 | r = -errno; | |
498 | goto finish; | |
499 | } | |
500 | ||
501 | free(passwd_tmp); | |
502 | passwd_tmp = NULL; | |
503 | } | |
504 | ||
a12b0cc3 | 505 | r = 0; |
1b992147 LP |
506 | |
507 | finish: | |
a12b0cc3 LP |
508 | if (passwd_tmp) |
509 | unlink(passwd_tmp); | |
510 | if (group_tmp) | |
511 | unlink(group_tmp); | |
1b992147 LP |
512 | |
513 | return r; | |
514 | } | |
515 | ||
516 | static int uid_is_ok(uid_t uid, const char *name) { | |
517 | struct passwd *p; | |
518 | struct group *g; | |
519 | const char *n; | |
520 | Item *i; | |
521 | ||
522 | /* Let's see if we already have assigned the UID a second time */ | |
523 | if (hashmap_get(todo_uids, UID_TO_PTR(uid))) | |
524 | return 0; | |
525 | ||
526 | /* Try to avoid using uids that are already used by a group | |
527 | * that doesn't have the same name as our new user. */ | |
528 | i = hashmap_get(todo_gids, GID_TO_PTR(uid)); | |
529 | if (i && !streq(i->name, name)) | |
530 | return 0; | |
531 | ||
532 | /* Let's check the files directly */ | |
533 | if (hashmap_contains(database_uid, UID_TO_PTR(uid))) | |
534 | return 0; | |
535 | ||
536 | n = hashmap_get(database_gid, GID_TO_PTR(uid)); | |
537 | if (n && !streq(n, name)) | |
538 | return 0; | |
539 | ||
540 | /* Let's also check via NSS, to avoid UID clashes over LDAP and such, just in case */ | |
541 | if (!arg_root) { | |
542 | errno = 0; | |
543 | p = getpwuid(uid); | |
544 | if (p) | |
545 | return 0; | |
b0284aba | 546 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
547 | return -errno; |
548 | ||
549 | errno = 0; | |
550 | g = getgrgid((gid_t) uid); | |
551 | if (g) { | |
552 | if (!streq(g->gr_name, name)) | |
553 | return 0; | |
b0284aba | 554 | } else if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
555 | return -errno; |
556 | } | |
557 | ||
558 | return 1; | |
559 | } | |
560 | ||
561 | static int root_stat(const char *p, struct stat *st) { | |
562 | const char *fix; | |
563 | ||
564 | fix = fix_root(p); | |
565 | if (stat(fix, st) < 0) | |
566 | return -errno; | |
567 | ||
568 | return 0; | |
569 | } | |
570 | ||
571 | static int read_id_from_file(Item *i, uid_t *_uid, gid_t *_gid) { | |
572 | struct stat st; | |
573 | bool found_uid = false, found_gid = false; | |
574 | uid_t uid; | |
575 | gid_t gid; | |
576 | ||
577 | assert(i); | |
578 | ||
579 | /* First, try to get the gid directly */ | |
580 | if (_gid && i->gid_path && root_stat(i->gid_path, &st) >= 0) { | |
581 | gid = st.st_gid; | |
582 | found_gid = true; | |
583 | } | |
584 | ||
585 | /* Then, try to get the uid directly */ | |
586 | if ((_uid || (_gid && !found_gid)) | |
587 | && i->uid_path | |
588 | && root_stat(i->uid_path, &st) >= 0) { | |
589 | ||
590 | uid = st.st_uid; | |
591 | found_uid = true; | |
592 | ||
593 | /* If we need the gid, but had no success yet, also derive it from the uid path */ | |
594 | if (_gid && !found_gid) { | |
595 | gid = st.st_gid; | |
596 | found_gid = true; | |
597 | } | |
598 | } | |
599 | ||
600 | /* If that didn't work yet, then let's reuse the gid as uid */ | |
601 | if (_uid && !found_uid && i->gid_path) { | |
602 | ||
603 | if (found_gid) { | |
604 | uid = (uid_t) gid; | |
605 | found_uid = true; | |
606 | } else if (root_stat(i->gid_path, &st) >= 0) { | |
607 | uid = (uid_t) st.st_gid; | |
608 | found_uid = true; | |
609 | } | |
610 | } | |
611 | ||
612 | if (_uid) { | |
613 | if (!found_uid) | |
614 | return 0; | |
615 | ||
616 | *_uid = uid; | |
617 | } | |
618 | ||
619 | if (_gid) { | |
620 | if (!found_gid) | |
621 | return 0; | |
622 | ||
623 | *_gid = gid; | |
624 | } | |
625 | ||
626 | return 1; | |
627 | } | |
628 | ||
629 | static int add_user(Item *i) { | |
630 | void *z; | |
631 | int r; | |
632 | ||
633 | assert(i); | |
634 | ||
635 | /* Check the database directly */ | |
636 | z = hashmap_get(database_user, i->name); | |
637 | if (z) { | |
638 | log_debug("User %s already exists.", i->name); | |
c1b6b04f | 639 | i->uid = PTR_TO_UID(z); |
1b992147 LP |
640 | i->uid_set = true; |
641 | return 0; | |
642 | } | |
643 | ||
644 | if (!arg_root) { | |
645 | struct passwd *p; | |
646 | struct spwd *sp; | |
647 | ||
648 | /* Also check NSS */ | |
649 | errno = 0; | |
650 | p = getpwnam(i->name); | |
651 | if (p) { | |
652 | log_debug("User %s already exists.", i->name); | |
653 | i->uid = p->pw_uid; | |
654 | i->uid_set = true; | |
655 | ||
656 | free(i->description); | |
657 | i->description = strdup(p->pw_gecos); | |
658 | return 0; | |
659 | } | |
b0284aba | 660 | if (!IN_SET(errno, 0, ENOENT)) { |
1b992147 LP |
661 | log_error("Failed to check if user %s already exists: %m", i->name); |
662 | return -errno; | |
663 | } | |
664 | ||
665 | /* And shadow too, just to be sure */ | |
666 | errno = 0; | |
667 | sp = getspnam(i->name); | |
668 | if (sp) { | |
669 | log_error("User %s already exists in shadow database, but not in user database.", i->name); | |
670 | return -EBADMSG; | |
671 | } | |
b0284aba | 672 | if (!IN_SET(errno, 0, ENOENT)) { |
1b992147 LP |
673 | log_error("Failed to check if user %s already exists in shadow database: %m", i->name); |
674 | return -errno; | |
675 | } | |
676 | } | |
677 | ||
678 | /* Try to use the suggested numeric uid */ | |
679 | if (i->uid_set) { | |
680 | r = uid_is_ok(i->uid, i->name); | |
681 | if (r < 0) { | |
682 | log_error("Failed to verify uid " UID_FMT ": %s", i->uid, strerror(-r)); | |
683 | return r; | |
684 | } | |
685 | if (r == 0) { | |
686 | log_debug("Suggested user ID " UID_FMT " for %s already used.", i->uid, i->name); | |
687 | i->uid_set = false; | |
688 | } | |
689 | } | |
690 | ||
691 | /* If that didn't work, try to read it from the specified path */ | |
692 | if (!i->uid_set) { | |
693 | uid_t c; | |
694 | ||
695 | if (read_id_from_file(i, &c, NULL) > 0) { | |
696 | ||
697 | if (c <= 0 || c > SYSTEM_UID_MAX) | |
698 | log_debug("User ID " UID_FMT " of file not suitable for %s.", c, i->name); | |
699 | else { | |
700 | r = uid_is_ok(c, i->name); | |
701 | if (r < 0) { | |
702 | log_error("Failed to verify uid " UID_FMT ": %s", i->uid, strerror(-r)); | |
703 | return r; | |
704 | } else if (r > 0) { | |
705 | i->uid = c; | |
706 | i->uid_set = true; | |
707 | } else | |
708 | log_debug("User ID " UID_FMT " of file for %s is already used.", c, i->name); | |
709 | } | |
710 | } | |
711 | } | |
712 | ||
713 | /* Otherwise try to reuse the group ID */ | |
714 | if (!i->uid_set && i->gid_set) { | |
715 | r = uid_is_ok((uid_t) i->gid, i->name); | |
716 | if (r < 0) { | |
717 | log_error("Failed to verify uid " UID_FMT ": %s", i->uid, strerror(-r)); | |
718 | return r; | |
719 | } | |
720 | if (r > 0) { | |
721 | i->uid = (uid_t) i->gid; | |
722 | i->uid_set = true; | |
723 | } | |
724 | } | |
725 | ||
726 | /* And if that didn't work either, let's try to find a free one */ | |
727 | if (!i->uid_set) { | |
728 | for (; search_uid > 0; search_uid--) { | |
729 | ||
730 | r = uid_is_ok(search_uid, i->name); | |
731 | if (r < 0) { | |
732 | log_error("Failed to verify uid " UID_FMT ": %s", i->uid, strerror(-r)); | |
733 | return r; | |
734 | } else if (r > 0) | |
735 | break; | |
736 | } | |
737 | ||
738 | if (search_uid <= 0) { | |
739 | log_error("No free user ID available for %s.", i->name); | |
740 | return -E2BIG; | |
741 | } | |
742 | ||
743 | i->uid_set = true; | |
744 | i->uid = search_uid; | |
745 | ||
746 | search_uid--; | |
747 | } | |
748 | ||
749 | r = hashmap_ensure_allocated(&todo_uids, trivial_hash_func, trivial_compare_func); | |
750 | if (r < 0) | |
751 | return log_oom(); | |
752 | ||
753 | r = hashmap_put(todo_uids, UID_TO_PTR(i->uid), i); | |
754 | if (r < 0) | |
755 | return log_oom(); | |
756 | ||
c1b6b04f | 757 | i->todo_user = true; |
1b992147 LP |
758 | log_info("Creating user %s (%s) with uid " UID_FMT " and gid " GID_FMT ".", i->name, strna(i->description), i->uid, i->gid); |
759 | ||
760 | return 0; | |
761 | } | |
762 | ||
763 | static int gid_is_ok(gid_t gid) { | |
764 | struct group *g; | |
765 | struct passwd *p; | |
766 | ||
767 | if (hashmap_get(todo_gids, GID_TO_PTR(gid))) | |
768 | return 0; | |
769 | ||
770 | /* Avoid reusing gids that are already used by a different user */ | |
771 | if (hashmap_get(todo_uids, UID_TO_PTR(gid))) | |
772 | return 0; | |
773 | ||
774 | if (hashmap_contains(database_gid, GID_TO_PTR(gid))) | |
775 | return 0; | |
776 | ||
777 | if (hashmap_contains(database_uid, UID_TO_PTR(gid))) | |
778 | return 0; | |
779 | ||
780 | if (!arg_root) { | |
781 | errno = 0; | |
782 | g = getgrgid(gid); | |
783 | if (g) | |
784 | return 0; | |
b0284aba | 785 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
786 | return -errno; |
787 | ||
788 | errno = 0; | |
789 | p = getpwuid((uid_t) gid); | |
790 | if (p) | |
791 | return 0; | |
b0284aba | 792 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
793 | return -errno; |
794 | } | |
795 | ||
796 | return 1; | |
797 | } | |
798 | ||
799 | static int add_group(Item *i) { | |
800 | void *z; | |
801 | int r; | |
802 | ||
803 | assert(i); | |
804 | ||
805 | /* Check the database directly */ | |
806 | z = hashmap_get(database_group, i->name); | |
807 | if (z) { | |
808 | log_debug("Group %s already exists.", i->name); | |
809 | i->gid = PTR_TO_GID(z); | |
810 | i->gid_set = true; | |
811 | return 0; | |
812 | } | |
813 | ||
814 | /* Also check NSS */ | |
815 | if (!arg_root) { | |
816 | struct group *g; | |
817 | ||
818 | errno = 0; | |
819 | g = getgrnam(i->name); | |
820 | if (g) { | |
821 | log_debug("Group %s already exists.", i->name); | |
822 | i->gid = g->gr_gid; | |
823 | i->gid_set = true; | |
824 | return 0; | |
825 | } | |
b0284aba | 826 | if (!IN_SET(errno, 0, ENOENT)) { |
1b992147 LP |
827 | log_error("Failed to check if group %s already exists: %m", i->name); |
828 | return -errno; | |
829 | } | |
830 | } | |
831 | ||
832 | /* Try to use the suggested numeric gid */ | |
833 | if (i->gid_set) { | |
834 | r = gid_is_ok(i->gid); | |
835 | if (r < 0) { | |
836 | log_error("Failed to verify gid " GID_FMT ": %s", i->gid, strerror(-r)); | |
837 | return r; | |
838 | } | |
839 | if (r == 0) { | |
840 | log_debug("Suggested group ID " GID_FMT " for %s already used.", i->gid, i->name); | |
841 | i->gid_set = false; | |
842 | } | |
843 | } | |
844 | ||
845 | /* Try to reuse the numeric uid, if there's one */ | |
846 | if (!i->gid_set && i->uid_set) { | |
847 | r = gid_is_ok((gid_t) i->uid); | |
848 | if (r < 0) { | |
849 | log_error("Failed to verify gid " GID_FMT ": %s", i->gid, strerror(-r)); | |
850 | return r; | |
851 | } | |
852 | if (r > 0) { | |
853 | i->gid = (gid_t) i->uid; | |
854 | i->gid_set = true; | |
855 | } | |
856 | } | |
857 | ||
858 | /* If that didn't work, try to read it from the specified path */ | |
859 | if (!i->gid_set) { | |
860 | gid_t c; | |
861 | ||
862 | if (read_id_from_file(i, NULL, &c) > 0) { | |
863 | ||
864 | if (c <= 0 || c > SYSTEM_GID_MAX) | |
865 | log_debug("Group ID " GID_FMT " of file not suitable for %s.", c, i->name); | |
866 | else { | |
867 | r = gid_is_ok(c); | |
868 | if (r < 0) { | |
869 | log_error("Failed to verify gid " GID_FMT ": %s", i->gid, strerror(-r)); | |
870 | return r; | |
871 | } else if (r > 0) { | |
872 | i->gid = c; | |
873 | i->gid_set = true; | |
874 | } else | |
875 | log_debug("Group ID " GID_FMT " of file for %s already used.", c, i->name); | |
876 | } | |
877 | } | |
878 | } | |
879 | ||
880 | /* And if that didn't work either, let's try to find a free one */ | |
881 | if (!i->gid_set) { | |
882 | for (; search_gid > 0; search_gid--) { | |
883 | r = gid_is_ok(search_gid); | |
884 | if (r < 0) { | |
885 | log_error("Failed to verify gid " GID_FMT ": %s", i->gid, strerror(-r)); | |
886 | return r; | |
887 | } else if (r > 0) | |
888 | break; | |
889 | } | |
890 | ||
891 | if (search_gid <= 0) { | |
892 | log_error("No free group ID available for %s.", i->name); | |
893 | return -E2BIG; | |
894 | } | |
895 | ||
896 | i->gid_set = true; | |
897 | i->gid = search_gid; | |
898 | ||
899 | search_gid--; | |
900 | } | |
901 | ||
902 | r = hashmap_ensure_allocated(&todo_gids, trivial_hash_func, trivial_compare_func); | |
903 | if (r < 0) | |
904 | return log_oom(); | |
905 | ||
906 | r = hashmap_put(todo_gids, GID_TO_PTR(i->gid), i); | |
907 | if (r < 0) | |
908 | return log_oom(); | |
909 | ||
c1b6b04f | 910 | i->todo_group = true; |
1b992147 LP |
911 | log_info("Creating group %s with gid " GID_FMT ".", i->name, i->gid); |
912 | ||
913 | return 0; | |
914 | } | |
915 | ||
916 | static int process_item(Item *i) { | |
917 | int r; | |
918 | ||
919 | assert(i); | |
920 | ||
921 | switch (i->type) { | |
922 | ||
923 | case ADD_USER: | |
924 | r = add_group(i); | |
925 | if (r < 0) | |
926 | return r; | |
927 | ||
928 | return add_user(i); | |
929 | ||
930 | case ADD_GROUP: { | |
931 | Item *j; | |
932 | ||
933 | j = hashmap_get(users, i->name); | |
934 | if (j) { | |
935 | /* There's already user to be created for this | |
936 | * name, let's process that in one step */ | |
937 | ||
938 | if (i->gid_set) { | |
939 | j->gid = i->gid; | |
940 | j->gid_set = true; | |
941 | } | |
942 | ||
943 | if (i->gid_path) { | |
944 | free(j->gid_path); | |
945 | j->gid_path = strdup(i->gid_path); | |
946 | if (!j->gid_path) | |
947 | return log_oom(); | |
948 | } | |
949 | ||
950 | return 0; | |
951 | } | |
952 | ||
953 | return add_group(i); | |
954 | } | |
1b992147 | 955 | |
a12b0cc3 LP |
956 | default: |
957 | assert_not_reached("Unknown item type"); | |
958 | } | |
1b992147 LP |
959 | } |
960 | ||
961 | static void item_free(Item *i) { | |
962 | ||
963 | if (!i) | |
964 | return; | |
965 | ||
966 | free(i->name); | |
967 | free(i->uid_path); | |
968 | free(i->gid_path); | |
969 | free(i->description); | |
970 | free(i); | |
971 | } | |
972 | ||
973 | DEFINE_TRIVIAL_CLEANUP_FUNC(Item*, item_free); | |
974 | ||
a12b0cc3 LP |
975 | static int add_implicit(void) { |
976 | char *g, **l; | |
977 | Iterator iterator; | |
978 | int r; | |
979 | ||
980 | /* Implicitly create additional users and groups, if they were listed in "m" lines */ | |
981 | ||
982 | HASHMAP_FOREACH_KEY(l, g, members, iterator) { | |
983 | Item *i; | |
984 | char **m; | |
985 | ||
986 | i = hashmap_get(groups, g); | |
987 | if (!i) { | |
988 | _cleanup_(item_freep) Item *j = NULL; | |
989 | ||
990 | r = hashmap_ensure_allocated(&groups, string_hash_func, string_compare_func); | |
991 | if (r < 0) | |
992 | return log_oom(); | |
993 | ||
994 | j = new0(Item, 1); | |
995 | if (!j) | |
996 | return log_oom(); | |
997 | ||
998 | j->type = ADD_GROUP; | |
999 | j->name = strdup(g); | |
1000 | if (!j->name) | |
1001 | return log_oom(); | |
1002 | ||
1003 | r = hashmap_put(groups, j->name, j); | |
1004 | if (r < 0) | |
1005 | return log_oom(); | |
1006 | ||
1007 | log_debug("Adding implicit group '%s' due to m line", j->name); | |
1008 | j = NULL; | |
1009 | } | |
1010 | ||
1011 | STRV_FOREACH(m, l) { | |
1012 | ||
1013 | i = hashmap_get(users, *m); | |
1014 | if (!i) { | |
1015 | _cleanup_(item_freep) Item *j = NULL; | |
1016 | ||
1017 | r = hashmap_ensure_allocated(&users, string_hash_func, string_compare_func); | |
1018 | if (r < 0) | |
1019 | return log_oom(); | |
1020 | ||
1021 | j = new0(Item, 1); | |
1022 | if (!j) | |
1023 | return log_oom(); | |
1024 | ||
1025 | j->type = ADD_USER; | |
1026 | j->name = strdup(*m); | |
1027 | if (!j->name) | |
1028 | return log_oom(); | |
1029 | ||
1030 | r = hashmap_put(users, j->name, j); | |
1031 | if (r < 0) | |
1032 | return log_oom(); | |
1033 | ||
1034 | log_debug("Adding implicit user '%s' due to m line", j->name); | |
1035 | j = NULL; | |
1036 | } | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | return 0; | |
1041 | } | |
1042 | ||
1b992147 LP |
1043 | static bool item_equal(Item *a, Item *b) { |
1044 | assert(a); | |
1045 | assert(b); | |
1046 | ||
1047 | if (a->type != b->type) | |
1048 | return false; | |
1049 | ||
1050 | if (!streq_ptr(a->name, b->name)) | |
1051 | return false; | |
1052 | ||
1053 | if (!streq_ptr(a->uid_path, b->uid_path)) | |
1054 | return false; | |
1055 | ||
1056 | if (!streq_ptr(a->gid_path, b->gid_path)) | |
1057 | return false; | |
1058 | ||
1059 | if (!streq_ptr(a->description, b->description)) | |
1060 | return false; | |
1061 | ||
1062 | if (a->uid_set != b->uid_set) | |
1063 | return false; | |
1064 | ||
1065 | if (a->uid_set && a->uid != b->uid) | |
1066 | return false; | |
1067 | ||
1068 | if (a->gid_set != b->gid_set) | |
1069 | return false; | |
1070 | ||
1071 | if (a->gid_set && a->gid != b->gid) | |
1072 | return false; | |
1073 | ||
1074 | return true; | |
1075 | } | |
1076 | ||
1077 | static bool valid_user_group_name(const char *u) { | |
1078 | const char *i; | |
1079 | long sz; | |
1080 | ||
1081 | if (isempty(u) < 0) | |
1082 | return false; | |
1083 | ||
1084 | if (!(u[0] >= 'a' && u[0] <= 'z') && | |
1085 | !(u[0] >= 'A' && u[0] <= 'Z') && | |
1086 | u[0] != '_') | |
1087 | return false; | |
1088 | ||
1089 | for (i = u+1; *i; i++) { | |
1090 | if (!(*i >= 'a' && *i <= 'z') && | |
1091 | !(*i >= 'A' && *i <= 'Z') && | |
1092 | !(*i >= '0' && *i <= '9') && | |
1093 | *i != '_' && | |
1094 | *i != '-') | |
1095 | return false; | |
1096 | } | |
1097 | ||
1098 | sz = sysconf(_SC_LOGIN_NAME_MAX); | |
1099 | assert_se(sz > 0); | |
1100 | ||
1101 | if ((size_t) (i-u) > (size_t) sz) | |
1102 | return false; | |
1103 | ||
932ad62b LP |
1104 | if ((size_t) (i-u) > UT_NAMESIZE - 1) |
1105 | return false; | |
1106 | ||
1b992147 LP |
1107 | return true; |
1108 | } | |
1109 | ||
1110 | static bool valid_gecos(const char *d) { | |
1111 | ||
1112 | if (!utf8_is_valid(d)) | |
1113 | return false; | |
1114 | ||
38c74dad LP |
1115 | if (string_has_cc(d, NULL)) |
1116 | return false; | |
1117 | ||
1118 | /* Colons are used as field separators, and hence not OK */ | |
1119 | if (strchr(d, ':')) | |
1b992147 LP |
1120 | return false; |
1121 | ||
1122 | return true; | |
1123 | } | |
1124 | ||
1125 | static int parse_line(const char *fname, unsigned line, const char *buffer) { | |
1126 | ||
1127 | static const Specifier specifier_table[] = { | |
1128 | { 'm', specifier_machine_id, NULL }, | |
1129 | { 'b', specifier_boot_id, NULL }, | |
1130 | { 'H', specifier_host_name, NULL }, | |
1131 | { 'v', specifier_kernel_release, NULL }, | |
1132 | {} | |
1133 | }; | |
1134 | ||
a12b0cc3 | 1135 | _cleanup_free_ char *action = NULL, *name = NULL, *id = NULL, *resolved_name = NULL; |
1b992147 LP |
1136 | _cleanup_(item_freep) Item *i = NULL; |
1137 | Item *existing; | |
1138 | Hashmap *h; | |
1139 | int r, n = -1; | |
1140 | ||
1141 | assert(fname); | |
1142 | assert(line >= 1); | |
1143 | assert(buffer); | |
1144 | ||
1145 | r = sscanf(buffer, | |
1146 | "%ms %ms %ms %n", | |
1147 | &action, | |
1148 | &name, | |
1149 | &id, | |
1150 | &n); | |
1151 | if (r < 2) { | |
1152 | log_error("[%s:%u] Syntax error.", fname, line); | |
1153 | return -EIO; | |
1154 | } | |
1155 | ||
1156 | if (strlen(action) != 1) { | |
1157 | log_error("[%s:%u] Unknown modifier '%s'", fname, line, action); | |
1158 | return -EINVAL; | |
1159 | } | |
1160 | ||
a12b0cc3 | 1161 | if (!IN_SET(action[0], ADD_USER, ADD_GROUP, ADD_MEMBER)) { |
1b992147 LP |
1162 | log_error("[%s:%u] Unknown command command type '%c'.", fname, line, action[0]); |
1163 | return -EBADMSG; | |
1164 | } | |
1165 | ||
a12b0cc3 | 1166 | r = specifier_printf(name, specifier_table, NULL, &resolved_name); |
1b992147 LP |
1167 | if (r < 0) { |
1168 | log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, name); | |
1169 | return r; | |
1170 | } | |
1171 | ||
a12b0cc3 LP |
1172 | if (!valid_user_group_name(resolved_name)) { |
1173 | log_error("[%s:%u] '%s' is not a valid user or group name.", fname, line, resolved_name); | |
1b992147 LP |
1174 | return -EINVAL; |
1175 | } | |
1176 | ||
1177 | if (n >= 0) { | |
1178 | n += strspn(buffer+n, WHITESPACE); | |
1b992147 | 1179 | |
a12b0cc3 LP |
1180 | if (STR_IN_SET(buffer + n, "", "-")) |
1181 | n = -1; | |
1b992147 LP |
1182 | } |
1183 | ||
a12b0cc3 | 1184 | switch (action[0]) { |
1b992147 | 1185 | |
a12b0cc3 LP |
1186 | case ADD_MEMBER: { |
1187 | _cleanup_free_ char *resolved_id = NULL; | |
1188 | char **l; | |
1b992147 | 1189 | |
a12b0cc3 LP |
1190 | r = hashmap_ensure_allocated(&members, string_hash_func, string_compare_func); |
1191 | if (r < 0) | |
1192 | return log_oom(); | |
1b992147 | 1193 | |
a12b0cc3 | 1194 | /* Try to extend an existing member or group item */ |
1b992147 | 1195 | |
a12b0cc3 LP |
1196 | if (!id || streq(id, "-")) { |
1197 | log_error("[%s:%u] Lines of type 'm' require a group name in the third field.", fname, line); | |
1198 | return -EINVAL; | |
1199 | } | |
1b992147 | 1200 | |
a12b0cc3 LP |
1201 | r = specifier_printf(id, specifier_table, NULL, &resolved_id); |
1202 | if (r < 0) { | |
1203 | log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, name); | |
1204 | return r; | |
1205 | } | |
1b992147 | 1206 | |
a12b0cc3 LP |
1207 | if (!valid_user_group_name(resolved_id)) { |
1208 | log_error("[%s:%u] '%s' is not a valid user or group name.", fname, line, resolved_id); | |
1209 | return -EINVAL; | |
1210 | } | |
1b992147 | 1211 | |
a12b0cc3 LP |
1212 | if (n >= 0) { |
1213 | log_error("[%s:%u] Lines of type 'm' don't take a GECOS field.", fname, line); | |
1214 | return -EINVAL; | |
1215 | } | |
1216 | ||
1217 | l = hashmap_get(members, resolved_id); | |
1218 | if (l) { | |
1219 | /* A list for this group name already exists, let's append to it */ | |
1220 | r = strv_push(&l, resolved_name); | |
1221 | if (r < 0) | |
1222 | return log_oom(); | |
1223 | ||
1224 | resolved_name = NULL; | |
1225 | ||
1226 | assert_se(hashmap_update(members, resolved_id, l) >= 0); | |
1b992147 | 1227 | } else { |
a12b0cc3 LP |
1228 | /* No list for this group name exists yet, create one */ |
1229 | ||
1230 | l = new0(char *, 2); | |
1231 | if (!l) | |
1232 | return -ENOMEM; | |
1233 | ||
1234 | l[0] = resolved_name; | |
1235 | l[1] = NULL; | |
1b992147 | 1236 | |
a12b0cc3 | 1237 | r = hashmap_put(members, resolved_id, l); |
1b992147 | 1238 | if (r < 0) { |
a12b0cc3 LP |
1239 | free(l); |
1240 | return log_oom(); | |
1b992147 LP |
1241 | } |
1242 | ||
a12b0cc3 | 1243 | resolved_id = resolved_name = NULL; |
1b992147 | 1244 | } |
a12b0cc3 LP |
1245 | |
1246 | return 0; | |
1b992147 LP |
1247 | } |
1248 | ||
a12b0cc3 | 1249 | case ADD_USER: |
1b992147 | 1250 | r = hashmap_ensure_allocated(&users, string_hash_func, string_compare_func); |
a12b0cc3 LP |
1251 | if (r < 0) |
1252 | return log_oom(); | |
1253 | ||
1254 | i = new0(Item, 1); | |
1255 | if (!i) | |
1256 | return log_oom(); | |
1257 | ||
1258 | if (id && !streq(id, "-")) { | |
1259 | ||
1260 | if (path_is_absolute(id)) { | |
1261 | i->uid_path = strdup(id); | |
1262 | if (!i->uid_path) | |
1263 | return log_oom(); | |
1264 | ||
1265 | path_kill_slashes(i->uid_path); | |
1266 | ||
1267 | } else { | |
1268 | r = parse_uid(id, &i->uid); | |
1269 | if (r < 0) { | |
1270 | log_error("Failed to parse UID: %s", id); | |
1271 | return -EBADMSG; | |
1272 | } | |
1273 | ||
1274 | i->uid_set = true; | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | if (n >= 0) { | |
1279 | i->description = unquote(buffer+n, "\""); | |
1280 | if (!i->description) | |
1281 | return log_oom(); | |
1282 | ||
1283 | if (!valid_gecos(i->description)) { | |
1284 | log_error("[%s:%u] '%s' is not a valid GECOS field.", fname, line, i->description); | |
1285 | return -EINVAL; | |
1286 | } | |
1287 | } | |
1288 | ||
1b992147 | 1289 | h = users; |
a12b0cc3 LP |
1290 | break; |
1291 | ||
1292 | case ADD_GROUP: | |
1b992147 | 1293 | r = hashmap_ensure_allocated(&groups, string_hash_func, string_compare_func); |
a12b0cc3 LP |
1294 | if (r < 0) |
1295 | return log_oom(); | |
1296 | ||
1297 | if (n >= 0) { | |
1298 | log_error("[%s:%u] Lines of type 'g' don't take a GECOS field.", fname, line); | |
1299 | return -EINVAL; | |
1300 | } | |
1301 | ||
1302 | i = new0(Item, 1); | |
1303 | if (!i) | |
1304 | return log_oom(); | |
1305 | ||
1306 | if (id && !streq(id, "-")) { | |
1307 | ||
1308 | if (path_is_absolute(id)) { | |
1309 | i->gid_path = strdup(id); | |
1310 | if (!i->gid_path) | |
1311 | return log_oom(); | |
1312 | ||
1313 | path_kill_slashes(i->gid_path); | |
1314 | } else { | |
1315 | r = parse_gid(id, &i->gid); | |
1316 | if (r < 0) { | |
1317 | log_error("Failed to parse GID: %s", id); | |
1318 | return -EBADMSG; | |
1319 | } | |
1320 | ||
1321 | i->gid_set = true; | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | ||
1b992147 | 1326 | h = groups; |
a12b0cc3 | 1327 | break; |
bce415ed RC |
1328 | default: |
1329 | return -EBADMSG; | |
1b992147 | 1330 | } |
a12b0cc3 LP |
1331 | |
1332 | i->type = action[0]; | |
1333 | i->name = resolved_name; | |
1334 | resolved_name = NULL; | |
1b992147 LP |
1335 | |
1336 | existing = hashmap_get(h, i->name); | |
1337 | if (existing) { | |
1338 | ||
1339 | /* Two identical items are fine */ | |
1340 | if (!item_equal(existing, i)) | |
1341 | log_warning("Two or more conflicting lines for %s configured, ignoring.", i->name); | |
1342 | ||
1343 | return 0; | |
1344 | } | |
1345 | ||
1346 | r = hashmap_put(h, i->name, i); | |
a12b0cc3 LP |
1347 | if (r < 0) |
1348 | return log_oom(); | |
1b992147 LP |
1349 | |
1350 | i = NULL; | |
1351 | return 0; | |
1352 | } | |
1353 | ||
1354 | static int read_config_file(const char *fn, bool ignore_enoent) { | |
1355 | _cleanup_fclose_ FILE *f = NULL; | |
1356 | char line[LINE_MAX]; | |
1357 | unsigned v = 0; | |
1358 | int r; | |
1359 | ||
1360 | assert(fn); | |
1361 | ||
1362 | r = search_and_fopen_nulstr(fn, "re", arg_root, conf_file_dirs, &f); | |
1363 | if (r < 0) { | |
1364 | if (ignore_enoent && r == -ENOENT) | |
1365 | return 0; | |
1366 | ||
1367 | log_error("Failed to open '%s', ignoring: %s", fn, strerror(-r)); | |
1368 | return r; | |
1369 | } | |
1370 | ||
1371 | FOREACH_LINE(line, f, break) { | |
1372 | char *l; | |
1373 | int k; | |
1374 | ||
1375 | v++; | |
1376 | ||
1377 | l = strstrip(line); | |
1378 | if (*l == '#' || *l == 0) | |
1379 | continue; | |
1380 | ||
1381 | k = parse_line(fn, v, l); | |
1382 | if (k < 0 && r == 0) | |
1383 | r = k; | |
1384 | } | |
1385 | ||
1386 | if (ferror(f)) { | |
1387 | log_error("Failed to read from file %s: %m", fn); | |
1388 | if (r == 0) | |
1389 | r = -EIO; | |
1390 | } | |
1391 | ||
1392 | return r; | |
1393 | } | |
1394 | ||
1b992147 LP |
1395 | static void free_database(Hashmap *by_name, Hashmap *by_id) { |
1396 | char *name; | |
1397 | ||
1398 | for (;;) { | |
1399 | name = hashmap_first(by_id); | |
1400 | if (!name) | |
1401 | break; | |
1402 | ||
1403 | hashmap_remove(by_name, name); | |
1404 | ||
1405 | hashmap_steal_first_key(by_id); | |
1406 | free(name); | |
1407 | } | |
1408 | ||
1409 | while ((name = hashmap_steal_first_key(by_name))) | |
1410 | free(name); | |
1411 | ||
1412 | hashmap_free(by_name); | |
1413 | hashmap_free(by_id); | |
1414 | } | |
1415 | ||
1416 | static int help(void) { | |
1417 | ||
1418 | printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" | |
1419 | "Creates system user accounts.\n\n" | |
1420 | " -h --help Show this help\n" | |
1421 | " --version Show package version\n" | |
1422 | " --root=PATH Operate on an alternate filesystem root\n", | |
1423 | program_invocation_short_name); | |
1424 | ||
1425 | return 0; | |
1426 | } | |
1427 | ||
1428 | static int parse_argv(int argc, char *argv[]) { | |
1429 | ||
1430 | enum { | |
1431 | ARG_VERSION = 0x100, | |
1432 | ARG_ROOT, | |
1433 | }; | |
1434 | ||
1435 | static const struct option options[] = { | |
1436 | { "help", no_argument, NULL, 'h' }, | |
1437 | { "version", no_argument, NULL, ARG_VERSION }, | |
1438 | { "root", required_argument, NULL, ARG_ROOT }, | |
1439 | {} | |
1440 | }; | |
1441 | ||
1442 | int c; | |
1443 | ||
1444 | assert(argc >= 0); | |
1445 | assert(argv); | |
1446 | ||
1447 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { | |
1448 | ||
1449 | switch (c) { | |
1450 | ||
1451 | case 'h': | |
1452 | return help(); | |
1453 | ||
1454 | case ARG_VERSION: | |
1455 | puts(PACKAGE_STRING); | |
1456 | puts(SYSTEMD_FEATURES); | |
1457 | return 0; | |
1458 | ||
1459 | case ARG_ROOT: | |
1460 | free(arg_root); | |
1461 | arg_root = path_make_absolute_cwd(optarg); | |
1462 | if (!arg_root) | |
1463 | return log_oom(); | |
1464 | ||
1465 | path_kill_slashes(arg_root); | |
1466 | break; | |
1467 | ||
1468 | case '?': | |
1469 | return -EINVAL; | |
1470 | ||
1471 | default: | |
1472 | assert_not_reached("Unhandled option"); | |
1473 | } | |
1474 | } | |
1475 | ||
1476 | return 1; | |
1477 | } | |
1478 | ||
1479 | int main(int argc, char *argv[]) { | |
1480 | ||
1481 | _cleanup_close_ int lock = -1; | |
1482 | Iterator iterator; | |
1483 | int r, k; | |
1484 | Item *i; | |
a12b0cc3 | 1485 | char *n; |
1b992147 LP |
1486 | |
1487 | r = parse_argv(argc, argv); | |
1488 | if (r <= 0) | |
1489 | goto finish; | |
1490 | ||
1491 | log_set_target(LOG_TARGET_AUTO); | |
1492 | log_parse_environment(); | |
1493 | log_open(); | |
1494 | ||
1495 | umask(0022); | |
1496 | ||
9f1c1940 ZJS |
1497 | r = label_init(NULL); |
1498 | if (r < 0) { | |
1499 | log_error("SELinux setup failed: %s", strerror(-r)); | |
1500 | goto finish; | |
1501 | } | |
1b992147 LP |
1502 | |
1503 | if (optind < argc) { | |
1504 | int j; | |
1505 | ||
1506 | for (j = optind; j < argc; j++) { | |
1507 | k = read_config_file(argv[j], false); | |
1508 | if (k < 0 && r == 0) | |
1509 | r = k; | |
1510 | } | |
1511 | } else { | |
1512 | _cleanup_strv_free_ char **files = NULL; | |
1513 | char **f; | |
1514 | ||
1515 | r = conf_files_list_nulstr(&files, ".conf", arg_root, conf_file_dirs); | |
1516 | if (r < 0) { | |
1517 | log_error("Failed to enumerate sysusers.d files: %s", strerror(-r)); | |
1518 | goto finish; | |
1519 | } | |
1520 | ||
1521 | STRV_FOREACH(f, files) { | |
1522 | k = read_config_file(*f, true); | |
1523 | if (k < 0 && r == 0) | |
1524 | r = k; | |
1525 | } | |
1526 | } | |
1527 | ||
a12b0cc3 LP |
1528 | r = add_implicit(); |
1529 | if (r < 0) | |
1530 | goto finish; | |
1531 | ||
45035609 | 1532 | lock = take_password_lock(arg_root); |
1b992147 LP |
1533 | if (lock < 0) { |
1534 | log_error("Failed to take lock: %s", strerror(-lock)); | |
1535 | goto finish; | |
1536 | } | |
1537 | ||
1538 | r = load_user_database(); | |
1539 | if (r < 0) { | |
1540 | log_error("Failed to load user database: %s", strerror(-r)); | |
1541 | goto finish; | |
1542 | } | |
1543 | ||
1544 | r = load_group_database(); | |
1545 | if (r < 0) { | |
1546 | log_error("Failed to read group database: %s", strerror(-r)); | |
1547 | goto finish; | |
1548 | } | |
1549 | ||
1550 | HASHMAP_FOREACH(i, groups, iterator) | |
1551 | process_item(i); | |
1552 | ||
1553 | HASHMAP_FOREACH(i, users, iterator) | |
1554 | process_item(i); | |
1555 | ||
1556 | r = write_files(); | |
1557 | if (r < 0) | |
1558 | log_error("Failed to write files: %s", strerror(-r)); | |
1559 | ||
1560 | finish: | |
1561 | while ((i = hashmap_steal_first(groups))) | |
1562 | item_free(i); | |
1563 | ||
1564 | while ((i = hashmap_steal_first(users))) | |
1565 | item_free(i); | |
1566 | ||
a12b0cc3 LP |
1567 | while ((n = hashmap_first_key(members))) { |
1568 | strv_free(hashmap_steal_first(members)); | |
1569 | free(n); | |
1570 | } | |
1571 | ||
1b992147 LP |
1572 | hashmap_free(groups); |
1573 | hashmap_free(users); | |
a12b0cc3 | 1574 | hashmap_free(members); |
1b992147 LP |
1575 | hashmap_free(todo_uids); |
1576 | hashmap_free(todo_gids); | |
1577 | ||
1578 | free_database(database_user, database_uid); | |
1579 | free_database(database_group, database_gid); | |
1580 | ||
1581 | free(arg_root); | |
1582 | ||
1583 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1584 | } |