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1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ | |
2 | ||
3 | #include <getopt.h> | |
4 | #include <utmp.h> | |
5 | ||
6 | #include "alloc-util.h" | |
7 | #include "build.h" | |
8 | #include "chase.h" | |
9 | #include "conf-files.h" | |
10 | #include "constants.h" | |
11 | #include "copy.h" | |
12 | #include "creds-util.h" | |
13 | #include "dissect-image.h" | |
14 | #include "env-util.h" | |
15 | #include "fd-util.h" | |
16 | #include "fileio.h" | |
17 | #include "format-util.h" | |
18 | #include "fs-util.h" | |
19 | #include "hashmap.h" | |
20 | #include "libcrypt-util.h" | |
21 | #include "main-func.h" | |
22 | #include "memory-util.h" | |
23 | #include "mount-util.h" | |
24 | #include "nscd-flush.h" | |
25 | #include "pager.h" | |
26 | #include "parse-argument.h" | |
27 | #include "path-util.h" | |
28 | #include "pretty-print.h" | |
29 | #include "selinux-util.h" | |
30 | #include "set.h" | |
31 | #include "smack-util.h" | |
32 | #include "specifier.h" | |
33 | #include "stat-util.h" | |
34 | #include "string-util.h" | |
35 | #include "strv.h" | |
36 | #include "sync-util.h" | |
37 | #include "tmpfile-util-label.h" | |
38 | #include "uid-classification.h" | |
39 | #include "uid-range.h" | |
40 | #include "user-util.h" | |
41 | #include "utf8.h" | |
42 | ||
43 | typedef enum ItemType { | |
44 | ADD_USER = 'u', | |
45 | ADD_GROUP = 'g', | |
46 | ADD_MEMBER = 'm', | |
47 | ADD_RANGE = 'r', | |
48 | } ItemType; | |
49 | ||
50 | static const char* item_type_to_string(ItemType t) { | |
51 | switch (t) { | |
52 | case ADD_USER: | |
53 | return "user"; | |
54 | case ADD_GROUP: | |
55 | return "group"; | |
56 | case ADD_MEMBER: | |
57 | return "member"; | |
58 | case ADD_RANGE: | |
59 | return "range"; | |
60 | default: | |
61 | assert_not_reached(); | |
62 | } | |
63 | } | |
64 | ||
65 | typedef struct Item { | |
66 | ItemType type; | |
67 | ||
68 | char *name; | |
69 | char *group_name; | |
70 | char *uid_path; | |
71 | char *gid_path; | |
72 | char *description; | |
73 | char *home; | |
74 | char *shell; | |
75 | ||
76 | gid_t gid; | |
77 | uid_t uid; | |
78 | ||
79 | char *filename; | |
80 | unsigned line; | |
81 | ||
82 | bool gid_set; | |
83 | ||
84 | /* When set the group with the specified GID must exist | |
85 | * and the check if a UID clashes with the GID is skipped. | |
86 | */ | |
87 | bool id_set_strict; | |
88 | ||
89 | bool uid_set; | |
90 | ||
91 | bool todo_user; | |
92 | bool todo_group; | |
93 | } Item; | |
94 | ||
95 | static char *arg_root = NULL; | |
96 | static char *arg_image = NULL; | |
97 | static CatFlags arg_cat_flags = CAT_CONFIG_OFF; | |
98 | static const char *arg_replace = NULL; | |
99 | static bool arg_dry_run = false; | |
100 | static bool arg_inline = false; | |
101 | static PagerFlags arg_pager_flags = 0; | |
102 | static ImagePolicy *arg_image_policy = NULL; | |
103 | ||
104 | STATIC_DESTRUCTOR_REGISTER(arg_root, freep); | |
105 | STATIC_DESTRUCTOR_REGISTER(arg_image, freep); | |
106 | STATIC_DESTRUCTOR_REGISTER(arg_image_policy, image_policy_freep); | |
107 | ||
108 | typedef struct Context { | |
109 | OrderedHashmap *users, *groups; | |
110 | OrderedHashmap *todo_uids, *todo_gids; | |
111 | OrderedHashmap *members; | |
112 | ||
113 | Hashmap *database_by_uid, *database_by_username; | |
114 | Hashmap *database_by_gid, *database_by_groupname; | |
115 | ||
116 | /* A helper set to hold names that are used by database_by_{uid,gid,username,groupname} above. */ | |
117 | Set *names; | |
118 | ||
119 | uid_t search_uid; | |
120 | UIDRange *uid_range; | |
121 | ||
122 | UGIDAllocationRange login_defs; | |
123 | bool login_defs_need_warning; | |
124 | } Context; | |
125 | ||
126 | static void context_done(Context *c) { | |
127 | assert(c); | |
128 | ||
129 | ordered_hashmap_free(c->groups); | |
130 | ordered_hashmap_free(c->users); | |
131 | ordered_hashmap_free(c->members); | |
132 | ordered_hashmap_free(c->todo_uids); | |
133 | ordered_hashmap_free(c->todo_gids); | |
134 | ||
135 | hashmap_free(c->database_by_uid); | |
136 | hashmap_free(c->database_by_username); | |
137 | hashmap_free(c->database_by_gid); | |
138 | hashmap_free(c->database_by_groupname); | |
139 | ||
140 | set_free_free(c->names); | |
141 | uid_range_free(c->uid_range); | |
142 | } | |
143 | ||
144 | static void maybe_emit_login_defs_warning(Context *c) { | |
145 | assert(c); | |
146 | ||
147 | if (!c->login_defs_need_warning) | |
148 | return; | |
149 | ||
150 | if (c->login_defs.system_alloc_uid_min != SYSTEM_ALLOC_UID_MIN || | |
151 | c->login_defs.system_uid_max != SYSTEM_UID_MAX) | |
152 | log_warning("login.defs specifies UID allocation range "UID_FMT"–"UID_FMT | |
153 | " that is different than the built-in defaults ("UID_FMT"–"UID_FMT")", | |
154 | c->login_defs.system_alloc_uid_min, c->login_defs.system_uid_max, | |
155 | (uid_t) SYSTEM_ALLOC_UID_MIN, (uid_t) SYSTEM_UID_MAX); | |
156 | if (c->login_defs.system_alloc_gid_min != SYSTEM_ALLOC_GID_MIN || | |
157 | c->login_defs.system_gid_max != SYSTEM_GID_MAX) | |
158 | log_warning("login.defs specifies GID allocation range "GID_FMT"–"GID_FMT | |
159 | " that is different than the built-in defaults ("GID_FMT"–"GID_FMT")", | |
160 | c->login_defs.system_alloc_gid_min, c->login_defs.system_gid_max, | |
161 | (gid_t) SYSTEM_ALLOC_GID_MIN, (gid_t) SYSTEM_GID_MAX); | |
162 | ||
163 | c->login_defs_need_warning = false; | |
164 | } | |
165 | ||
166 | static int load_user_database(Context *c) { | |
167 | _cleanup_fclose_ FILE *f = NULL; | |
168 | const char *passwd_path; | |
169 | struct passwd *pw; | |
170 | int r; | |
171 | ||
172 | assert(c); | |
173 | ||
174 | passwd_path = prefix_roota(arg_root, "/etc/passwd"); | |
175 | f = fopen(passwd_path, "re"); | |
176 | if (!f) | |
177 | return errno == ENOENT ? 0 : -errno; | |
178 | ||
179 | r = hashmap_ensure_allocated(&c->database_by_username, &string_hash_ops); | |
180 | if (r < 0) | |
181 | return r; | |
182 | ||
183 | r = hashmap_ensure_allocated(&c->database_by_uid, NULL); | |
184 | if (r < 0) | |
185 | return r; | |
186 | ||
187 | /* Note that we use NULL, i.e. trivial_hash_ops here, so identical strings can exist in the set. */ | |
188 | r = set_ensure_allocated(&c->names, NULL); | |
189 | if (r < 0) | |
190 | return r; | |
191 | ||
192 | while ((r = fgetpwent_sane(f, &pw)) > 0) { | |
193 | ||
194 | char *n = strdup(pw->pw_name); | |
195 | if (!n) | |
196 | return -ENOMEM; | |
197 | ||
198 | r = set_consume(c->names, n); | |
199 | if (r < 0) | |
200 | return r; | |
201 | assert(r > 0); /* The set uses pointer comparisons, so n must not be in the set. */ | |
202 | ||
203 | r = hashmap_put(c->database_by_username, n, UID_TO_PTR(pw->pw_uid)); | |
204 | if (r == -EEXIST) | |
205 | log_debug_errno(r, "%s: user '%s' is listed twice, ignoring duplicate uid.", | |
206 | passwd_path, n); | |
207 | else if (r < 0) | |
208 | return r; | |
209 | ||
210 | r = hashmap_put(c->database_by_uid, UID_TO_PTR(pw->pw_uid), n); | |
211 | if (r == -EEXIST) | |
212 | log_debug_errno(r, "%s: uid "UID_FMT" is listed twice, ignoring duplicate name.", | |
213 | passwd_path, pw->pw_uid); | |
214 | else if (r < 0) | |
215 | return r; | |
216 | } | |
217 | return r; | |
218 | } | |
219 | ||
220 | static int load_group_database(Context *c) { | |
221 | _cleanup_fclose_ FILE *f = NULL; | |
222 | const char *group_path; | |
223 | struct group *gr; | |
224 | int r; | |
225 | ||
226 | assert(c); | |
227 | ||
228 | group_path = prefix_roota(arg_root, "/etc/group"); | |
229 | f = fopen(group_path, "re"); | |
230 | if (!f) | |
231 | return errno == ENOENT ? 0 : -errno; | |
232 | ||
233 | r = hashmap_ensure_allocated(&c->database_by_groupname, &string_hash_ops); | |
234 | if (r < 0) | |
235 | return r; | |
236 | ||
237 | r = hashmap_ensure_allocated(&c->database_by_gid, NULL); | |
238 | if (r < 0) | |
239 | return r; | |
240 | ||
241 | /* Note that we use NULL, i.e. trivial_hash_ops here, so identical strings can exist in the set. */ | |
242 | r = set_ensure_allocated(&c->names, NULL); | |
243 | if (r < 0) | |
244 | return r; | |
245 | ||
246 | while ((r = fgetgrent_sane(f, &gr)) > 0) { | |
247 | ||
248 | char *n = strdup(gr->gr_name); | |
249 | if (!n) | |
250 | return -ENOMEM; | |
251 | ||
252 | r = set_consume(c->names, n); | |
253 | if (r < 0) | |
254 | return r; | |
255 | assert(r > 0); /* The set uses pointer comparisons, so n must not be in the set. */ | |
256 | ||
257 | r = hashmap_put(c->database_by_groupname, n, GID_TO_PTR(gr->gr_gid)); | |
258 | if (r == -EEXIST) | |
259 | log_debug_errno(r, "%s: group '%s' is listed twice, ignoring duplicate gid.", | |
260 | group_path, n); | |
261 | else if (r < 0) | |
262 | return r; | |
263 | ||
264 | r = hashmap_put(c->database_by_gid, GID_TO_PTR(gr->gr_gid), n); | |
265 | if (r == -EEXIST) | |
266 | log_debug_errno(r, "%s: gid "GID_FMT" is listed twice, ignoring duplicate name.", | |
267 | group_path, gr->gr_gid); | |
268 | else if (r < 0) | |
269 | return r; | |
270 | } | |
271 | return r; | |
272 | } | |
273 | ||
274 | static int make_backup(const char *target, const char *x) { | |
275 | _cleanup_(unlink_and_freep) char *dst_tmp = NULL; | |
276 | _cleanup_fclose_ FILE *dst = NULL; | |
277 | _cleanup_close_ int src = -EBADF; | |
278 | const char *backup; | |
279 | struct stat st; | |
280 | int r; | |
281 | ||
282 | assert(target); | |
283 | assert(x); | |
284 | ||
285 | src = open(x, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
286 | if (src < 0) { | |
287 | if (errno == ENOENT) /* No backup necessary... */ | |
288 | return 0; | |
289 | ||
290 | return -errno; | |
291 | } | |
292 | ||
293 | if (fstat(src, &st) < 0) | |
294 | return -errno; | |
295 | ||
296 | r = fopen_temporary_label( | |
297 | target, /* The path for which to the look up the label */ | |
298 | x, /* Where we want the file actually to end up */ | |
299 | &dst, /* The temporary file we write to */ | |
300 | &dst_tmp); | |
301 | if (r < 0) | |
302 | return r; | |
303 | ||
304 | r = copy_bytes(src, fileno(dst), UINT64_MAX, COPY_REFLINK); | |
305 | if (r < 0) | |
306 | return r; | |
307 | ||
308 | backup = strjoina(x, "-"); | |
309 | ||
310 | /* Copy over the access mask. Don't fail on chmod() or chown(). If it stays owned by us and/or | |
311 | * unreadable by others, then it isn't too bad... */ | |
312 | r = fchmod_and_chown_with_fallback(fileno(dst), dst_tmp, st.st_mode & 07777, st.st_uid, st.st_gid); | |
313 | if (r < 0) | |
314 | log_warning_errno(r, "Failed to change access mode or ownership of %s: %m", backup); | |
315 | ||
316 | if (futimens(fileno(dst), (const struct timespec[2]) { st.st_atim, st.st_mtim }) < 0) | |
317 | log_warning_errno(errno, "Failed to fix access and modification time of %s: %m", backup); | |
318 | ||
319 | r = fsync_full(fileno(dst)); | |
320 | if (r < 0) | |
321 | return r; | |
322 | ||
323 | if (rename(dst_tmp, backup) < 0) | |
324 | return errno; | |
325 | ||
326 | dst_tmp = mfree(dst_tmp); /* disable the unlink_and_freep() hook now that the file has been renamed */ | |
327 | return 0; | |
328 | } | |
329 | ||
330 | static int putgrent_with_members( | |
331 | Context *c, | |
332 | const struct group *gr, | |
333 | FILE *group) { | |
334 | ||
335 | char **a; | |
336 | int r; | |
337 | ||
338 | assert(c); | |
339 | assert(gr); | |
340 | assert(group); | |
341 | ||
342 | a = ordered_hashmap_get(c->members, gr->gr_name); | |
343 | if (a) { | |
344 | _cleanup_strv_free_ char **l = NULL; | |
345 | bool added = false; | |
346 | ||
347 | l = strv_copy(gr->gr_mem); | |
348 | if (!l) | |
349 | return -ENOMEM; | |
350 | ||
351 | STRV_FOREACH(i, a) { | |
352 | if (strv_contains(l, *i)) | |
353 | continue; | |
354 | ||
355 | r = strv_extend(&l, *i); | |
356 | if (r < 0) | |
357 | return r; | |
358 | ||
359 | added = true; | |
360 | } | |
361 | ||
362 | if (added) { | |
363 | struct group t; | |
364 | ||
365 | strv_uniq(l); | |
366 | strv_sort(l); | |
367 | ||
368 | t = *gr; | |
369 | t.gr_mem = l; | |
370 | ||
371 | r = putgrent_sane(&t, group); | |
372 | return r < 0 ? r : 1; | |
373 | } | |
374 | } | |
375 | ||
376 | return putgrent_sane(gr, group); | |
377 | } | |
378 | ||
379 | #if ENABLE_GSHADOW | |
380 | static int putsgent_with_members( | |
381 | Context *c, | |
382 | const struct sgrp *sg, | |
383 | FILE *gshadow) { | |
384 | ||
385 | char **a; | |
386 | int r; | |
387 | ||
388 | assert(sg); | |
389 | assert(gshadow); | |
390 | ||
391 | a = ordered_hashmap_get(c->members, sg->sg_namp); | |
392 | if (a) { | |
393 | _cleanup_strv_free_ char **l = NULL; | |
394 | bool added = false; | |
395 | ||
396 | l = strv_copy(sg->sg_mem); | |
397 | if (!l) | |
398 | return -ENOMEM; | |
399 | ||
400 | STRV_FOREACH(i, a) { | |
401 | if (strv_contains(l, *i)) | |
402 | continue; | |
403 | ||
404 | r = strv_extend(&l, *i); | |
405 | if (r < 0) | |
406 | return r; | |
407 | ||
408 | added = true; | |
409 | } | |
410 | ||
411 | if (added) { | |
412 | struct sgrp t; | |
413 | ||
414 | strv_uniq(l); | |
415 | strv_sort(l); | |
416 | ||
417 | t = *sg; | |
418 | t.sg_mem = l; | |
419 | ||
420 | r = putsgent_sane(&t, gshadow); | |
421 | return r < 0 ? r : 1; | |
422 | } | |
423 | } | |
424 | ||
425 | return putsgent_sane(sg, gshadow); | |
426 | } | |
427 | #endif | |
428 | ||
429 | static const char* pick_shell(const Item *i) { | |
430 | if (i->type != ADD_USER) | |
431 | return NULL; | |
432 | if (i->shell) | |
433 | return i->shell; | |
434 | if (i->uid_set && i->uid == 0) | |
435 | return default_root_shell(arg_root); | |
436 | return NOLOGIN; | |
437 | } | |
438 | ||
439 | static int write_temporary_passwd( | |
440 | Context *c, | |
441 | const char *passwd_path, | |
442 | FILE **ret_tmpfile, | |
443 | char **ret_tmpfile_path) { | |
444 | ||
445 | _cleanup_fclose_ FILE *original = NULL, *passwd = NULL; | |
446 | _cleanup_(unlink_and_freep) char *passwd_tmp = NULL; | |
447 | struct passwd *pw = NULL; | |
448 | Item *i; | |
449 | int r; | |
450 | ||
451 | assert(c); | |
452 | ||
453 | if (ordered_hashmap_isempty(c->todo_uids)) | |
454 | return 0; | |
455 | ||
456 | if (arg_dry_run) { | |
457 | log_info("Would write /etc/passwd%s", special_glyph(SPECIAL_GLYPH_ELLIPSIS)); | |
458 | return 0; | |
459 | } | |
460 | ||
461 | r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp); | |
462 | if (r < 0) | |
463 | return log_debug_errno(r, "Failed to open temporary copy of %s: %m", passwd_path); | |
464 | ||
465 | original = fopen(passwd_path, "re"); | |
466 | if (original) { | |
467 | ||
468 | /* Allow fallback path for when /proc is not mounted. On any normal system /proc will be | |
469 | * mounted, but e.g. when 'dnf --installroot' is used, it might not be. There is no security | |
470 | * relevance here, since the environment is ultimately trusted, and not requiring /proc makes | |
471 | * it easier to depend on sysusers in packaging scripts and suchlike. */ | |
472 | r = copy_rights_with_fallback(fileno(original), fileno(passwd), passwd_tmp); | |
473 | if (r < 0) | |
474 | return log_debug_errno(r, "Failed to copy permissions from %s to %s: %m", | |
475 | passwd_path, passwd_tmp); | |
476 | ||
477 | while ((r = fgetpwent_sane(original, &pw)) > 0) { | |
478 | i = ordered_hashmap_get(c->users, pw->pw_name); | |
479 | if (i && i->todo_user) | |
480 | return log_error_errno(SYNTHETIC_ERRNO(EEXIST), | |
481 | "%s: User \"%s\" already exists.", | |
482 | passwd_path, pw->pw_name); | |
483 | ||
484 | if (ordered_hashmap_contains(c->todo_uids, UID_TO_PTR(pw->pw_uid))) | |
485 | return log_error_errno(SYNTHETIC_ERRNO(EEXIST), | |
486 | "%s: Detected collision for UID " UID_FMT ".", | |
487 | passwd_path, pw->pw_uid); | |
488 | ||
489 | /* Make sure we keep the NIS entries (if any) at the end. */ | |
490 | if (IN_SET(pw->pw_name[0], '+', '-')) | |
491 | break; | |
492 | ||
493 | r = putpwent_sane(pw, passwd); | |
494 | if (r < 0) | |
495 | return log_debug_errno(r, "Failed to add existing user \"%s\" to temporary passwd file: %m", | |
496 | pw->pw_name); | |
497 | } | |
498 | if (r < 0) | |
499 | return log_debug_errno(r, "Failed to read %s: %m", passwd_path); | |
500 | ||
501 | } else { | |
502 | if (errno != ENOENT) | |
503 | return log_debug_errno(errno, "Failed to open %s: %m", passwd_path); | |
504 | if (fchmod(fileno(passwd), 0644) < 0) | |
505 | return log_debug_errno(errno, "Failed to fchmod %s: %m", passwd_tmp); | |
506 | } | |
507 | ||
508 | ORDERED_HASHMAP_FOREACH(i, c->todo_uids) { | |
509 | _cleanup_free_ char *creds_shell = NULL, *cn = NULL; | |
510 | ||
511 | struct passwd n = { | |
512 | .pw_name = i->name, | |
513 | .pw_uid = i->uid, | |
514 | .pw_gid = i->gid, | |
515 | .pw_gecos = (char*) strempty(i->description), | |
516 | ||
517 | /* "x" means the password is stored in the shadow file */ | |
518 | .pw_passwd = (char*) PASSWORD_SEE_SHADOW, | |
519 | ||
520 | /* We default to the root directory as home */ | |
521 | .pw_dir = i->home ?: (char*) "/", | |
522 | ||
523 | /* Initialize the shell to nologin, with one exception: | |
524 | * for root we patch in something special */ | |
525 | .pw_shell = (char*) pick_shell(i), | |
526 | }; | |
527 | ||
528 | /* Try to pick up the shell for this account via the credentials logic */ | |
529 | cn = strjoin("passwd.shell.", i->name); | |
530 | if (!cn) | |
531 | return -ENOMEM; | |
532 | ||
533 | r = read_credential(cn, (void**) &creds_shell, NULL); | |
534 | if (r < 0) | |
535 | log_debug_errno(r, "Couldn't read credential '%s', ignoring: %m", cn); | |
536 | else | |
537 | n.pw_shell = creds_shell; | |
538 | ||
539 | r = putpwent_sane(&n, passwd); | |
540 | if (r < 0) | |
541 | return log_debug_errno(r, "Failed to add new user \"%s\" to temporary passwd file: %m", | |
542 | i->name); | |
543 | } | |
544 | ||
545 | /* Append the remaining NIS entries if any */ | |
546 | while (pw) { | |
547 | r = putpwent_sane(pw, passwd); | |
548 | if (r < 0) | |
549 | return log_debug_errno(r, "Failed to add existing user \"%s\" to temporary passwd file: %m", | |
550 | pw->pw_name); | |
551 | ||
552 | r = fgetpwent_sane(original, &pw); | |
553 | if (r < 0) | |
554 | return log_debug_errno(r, "Failed to read %s: %m", passwd_path); | |
555 | if (r == 0) | |
556 | break; | |
557 | } | |
558 | ||
559 | r = fflush_sync_and_check(passwd); | |
560 | if (r < 0) | |
561 | return log_debug_errno(r, "Failed to flush %s: %m", passwd_tmp); | |
562 | ||
563 | *ret_tmpfile = TAKE_PTR(passwd); | |
564 | *ret_tmpfile_path = TAKE_PTR(passwd_tmp); | |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
569 | static usec_t epoch_or_now(void) { | |
570 | uint64_t epoch; | |
571 | ||
572 | if (secure_getenv_uint64("SOURCE_DATE_EPOCH", &epoch) >= 0) { | |
573 | if (epoch > UINT64_MAX/USEC_PER_SEC) /* Overflow check */ | |
574 | return USEC_INFINITY; | |
575 | return (usec_t) epoch * USEC_PER_SEC; | |
576 | } | |
577 | ||
578 | return now(CLOCK_REALTIME); | |
579 | } | |
580 | ||
581 | static int write_temporary_shadow( | |
582 | Context *c, | |
583 | const char *shadow_path, | |
584 | FILE **ret_tmpfile, | |
585 | char **ret_tmpfile_path) { | |
586 | ||
587 | _cleanup_fclose_ FILE *original = NULL, *shadow = NULL; | |
588 | _cleanup_(unlink_and_freep) char *shadow_tmp = NULL; | |
589 | struct spwd *sp = NULL; | |
590 | long lstchg; | |
591 | Item *i; | |
592 | int r; | |
593 | ||
594 | assert(c); | |
595 | ||
596 | if (ordered_hashmap_isempty(c->todo_uids)) | |
597 | return 0; | |
598 | ||
599 | if (arg_dry_run) { | |
600 | log_info("Would write /etc/shadow%s", special_glyph(SPECIAL_GLYPH_ELLIPSIS)); | |
601 | return 0; | |
602 | } | |
603 | ||
604 | r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp); | |
605 | if (r < 0) | |
606 | return log_debug_errno(r, "Failed to open temporary copy of %s: %m", shadow_path); | |
607 | ||
608 | lstchg = (long) (epoch_or_now() / USEC_PER_DAY); | |
609 | ||
610 | original = fopen(shadow_path, "re"); | |
611 | if (original) { | |
612 | ||
613 | r = copy_rights_with_fallback(fileno(original), fileno(shadow), shadow_tmp); | |
614 | if (r < 0) | |
615 | return log_debug_errno(r, "Failed to copy permissions from %s to %s: %m", | |
616 | shadow_path, shadow_tmp); | |
617 | ||
618 | while ((r = fgetspent_sane(original, &sp)) > 0) { | |
619 | i = ordered_hashmap_get(c->users, sp->sp_namp); | |
620 | if (i && i->todo_user) { | |
621 | /* we will update the existing entry */ | |
622 | sp->sp_lstchg = lstchg; | |
623 | ||
624 | /* only the /etc/shadow stage is left, so we can | |
625 | * safely remove the item from the todo set */ | |
626 | i->todo_user = false; | |
627 | ordered_hashmap_remove(c->todo_uids, UID_TO_PTR(i->uid)); | |
628 | } | |
629 | ||
630 | /* Make sure we keep the NIS entries (if any) at the end. */ | |
631 | if (IN_SET(sp->sp_namp[0], '+', '-')) | |
632 | break; | |
633 | ||
634 | r = putspent_sane(sp, shadow); | |
635 | if (r < 0) | |
636 | return log_debug_errno(r, "Failed to add existing user \"%s\" to temporary shadow file: %m", | |
637 | sp->sp_namp); | |
638 | ||
639 | } | |
640 | if (r < 0) | |
641 | return log_debug_errno(r, "Failed to read %s: %m", shadow_path); | |
642 | ||
643 | } else { | |
644 | if (errno != ENOENT) | |
645 | return log_debug_errno(errno, "Failed to open %s: %m", shadow_path); | |
646 | if (fchmod(fileno(shadow), 0000) < 0) | |
647 | return log_debug_errno(errno, "Failed to fchmod %s: %m", shadow_tmp); | |
648 | } | |
649 | ||
650 | ORDERED_HASHMAP_FOREACH(i, c->todo_uids) { | |
651 | _cleanup_(erase_and_freep) char *creds_password = NULL; | |
652 | bool is_hashed; | |
653 | ||
654 | struct spwd n = { | |
655 | .sp_namp = i->name, | |
656 | .sp_lstchg = lstchg, | |
657 | .sp_min = -1, | |
658 | .sp_max = -1, | |
659 | .sp_warn = -1, | |
660 | .sp_inact = -1, | |
661 | .sp_expire = -1, | |
662 | .sp_flag = ULONG_MAX, /* this appears to be what everybody does ... */ | |
663 | }; | |
664 | ||
665 | r = get_credential_user_password(i->name, &creds_password, &is_hashed); | |
666 | if (r < 0) | |
667 | log_debug_errno(r, "Couldn't read password credential for user '%s', ignoring: %m", i->name); | |
668 | ||
669 | if (creds_password && !is_hashed) { | |
670 | _cleanup_(erase_and_freep) char* plaintext_password = TAKE_PTR(creds_password); | |
671 | r = hash_password(plaintext_password, &creds_password); | |
672 | if (r < 0) | |
673 | return log_debug_errno(r, "Failed to hash password: %m"); | |
674 | } | |
675 | ||
676 | if (creds_password) | |
677 | n.sp_pwdp = creds_password; | |
678 | else if (streq(i->name, "root")) | |
679 | /* Let firstboot set the password later */ | |
680 | n.sp_pwdp = (char*) PASSWORD_UNPROVISIONED; | |
681 | else | |
682 | n.sp_pwdp = (char*) PASSWORD_LOCKED_AND_INVALID; | |
683 | ||
684 | r = putspent_sane(&n, shadow); | |
685 | if (r < 0) | |
686 | return log_debug_errno(r, "Failed to add new user \"%s\" to temporary shadow file: %m", | |
687 | i->name); | |
688 | } | |
689 | ||
690 | /* Append the remaining NIS entries if any */ | |
691 | while (sp) { | |
692 | r = putspent_sane(sp, shadow); | |
693 | if (r < 0) | |
694 | return log_debug_errno(r, "Failed to add existing user \"%s\" to temporary shadow file: %m", | |
695 | sp->sp_namp); | |
696 | ||
697 | r = fgetspent_sane(original, &sp); | |
698 | if (r < 0) | |
699 | return log_debug_errno(r, "Failed to read %s: %m", shadow_path); | |
700 | if (r == 0) | |
701 | break; | |
702 | } | |
703 | if (!IN_SET(errno, 0, ENOENT)) | |
704 | return -errno; | |
705 | ||
706 | r = fflush_sync_and_check(shadow); | |
707 | if (r < 0) | |
708 | return log_debug_errno(r, "Failed to flush %s: %m", shadow_tmp); | |
709 | ||
710 | *ret_tmpfile = TAKE_PTR(shadow); | |
711 | *ret_tmpfile_path = TAKE_PTR(shadow_tmp); | |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
716 | static int write_temporary_group( | |
717 | Context *c, | |
718 | const char *group_path, | |
719 | FILE **ret_tmpfile, | |
720 | char **ret_tmpfile_path) { | |
721 | ||
722 | _cleanup_fclose_ FILE *original = NULL, *group = NULL; | |
723 | _cleanup_(unlink_and_freep) char *group_tmp = NULL; | |
724 | bool group_changed = false; | |
725 | struct group *gr = NULL; | |
726 | Item *i; | |
727 | int r; | |
728 | ||
729 | assert(c); | |
730 | ||
731 | if (ordered_hashmap_isempty(c->todo_gids) && ordered_hashmap_isempty(c->members)) | |
732 | return 0; | |
733 | ||
734 | if (arg_dry_run) { | |
735 | log_info("Would write /etc/group%s", special_glyph(SPECIAL_GLYPH_ELLIPSIS)); | |
736 | return 0; | |
737 | } | |
738 | ||
739 | r = fopen_temporary_label("/etc/group", group_path, &group, &group_tmp); | |
740 | if (r < 0) | |
741 | return log_error_errno(r, "Failed to open temporary copy of %s: %m", group_path); | |
742 | ||
743 | original = fopen(group_path, "re"); | |
744 | if (original) { | |
745 | ||
746 | r = copy_rights_with_fallback(fileno(original), fileno(group), group_tmp); | |
747 | if (r < 0) | |
748 | return log_error_errno(r, "Failed to copy permissions from %s to %s: %m", | |
749 | group_path, group_tmp); | |
750 | ||
751 | while ((r = fgetgrent_sane(original, &gr)) > 0) { | |
752 | /* Safety checks against name and GID collisions. Normally, | |
753 | * this should be unnecessary, but given that we look at the | |
754 | * entries anyway here, let's make an extra verification | |
755 | * step that we don't generate duplicate entries. */ | |
756 | ||
757 | i = ordered_hashmap_get(c->groups, gr->gr_name); | |
758 | if (i && i->todo_group) | |
759 | return log_error_errno(SYNTHETIC_ERRNO(EEXIST), | |
760 | "%s: Group \"%s\" already exists.", | |
761 | group_path, gr->gr_name); | |
762 | ||
763 | if (ordered_hashmap_contains(c->todo_gids, GID_TO_PTR(gr->gr_gid))) | |
764 | return log_error_errno(SYNTHETIC_ERRNO(EEXIST), | |
765 | "%s: Detected collision for GID " GID_FMT ".", | |
766 | group_path, gr->gr_gid); | |
767 | ||
768 | /* Make sure we keep the NIS entries (if any) at the end. */ | |
769 | if (IN_SET(gr->gr_name[0], '+', '-')) | |
770 | break; | |
771 | ||
772 | r = putgrent_with_members(c, gr, group); | |
773 | if (r < 0) | |
774 | return log_error_errno(r, "Failed to add existing group \"%s\" to temporary group file: %m", | |
775 | gr->gr_name); | |
776 | if (r > 0) | |
777 | group_changed = true; | |
778 | } | |
779 | if (r < 0) | |
780 | return log_error_errno(r, "Failed to read %s: %m", group_path); | |
781 | ||
782 | } else { | |
783 | if (errno != ENOENT) | |
784 | return log_error_errno(errno, "Failed to open %s: %m", group_path); | |
785 | if (fchmod(fileno(group), 0644) < 0) | |
786 | return log_error_errno(errno, "Failed to fchmod %s: %m", group_tmp); | |
787 | } | |
788 | ||
789 | ORDERED_HASHMAP_FOREACH(i, c->todo_gids) { | |
790 | struct group n = { | |
791 | .gr_name = i->name, | |
792 | .gr_gid = i->gid, | |
793 | .gr_passwd = (char*) PASSWORD_SEE_SHADOW, | |
794 | }; | |
795 | ||
796 | r = putgrent_with_members(c, &n, group); | |
797 | if (r < 0) | |
798 | return log_error_errno(r, "Failed to add new group \"%s\" to temporary group file: %m", | |
799 | gr->gr_name); | |
800 | ||
801 | group_changed = true; | |
802 | } | |
803 | ||
804 | /* Append the remaining NIS entries if any */ | |
805 | while (gr) { | |
806 | r = putgrent_sane(gr, group); | |
807 | if (r < 0) | |
808 | return log_error_errno(r, "Failed to add existing group \"%s\" to temporary group file: %m", | |
809 | gr->gr_name); | |
810 | ||
811 | r = fgetgrent_sane(original, &gr); | |
812 | if (r < 0) | |
813 | return log_error_errno(r, "Failed to read %s: %m", group_path); | |
814 | if (r == 0) | |
815 | break; | |
816 | } | |
817 | ||
818 | r = fflush_sync_and_check(group); | |
819 | if (r < 0) | |
820 | return log_error_errno(r, "Failed to flush %s: %m", group_tmp); | |
821 | ||
822 | if (group_changed) { | |
823 | *ret_tmpfile = TAKE_PTR(group); | |
824 | *ret_tmpfile_path = TAKE_PTR(group_tmp); | |
825 | } | |
826 | return 0; | |
827 | } | |
828 | ||
829 | static int write_temporary_gshadow( | |
830 | Context *c, | |
831 | const char * gshadow_path, | |
832 | FILE **ret_tmpfile, | |
833 | char **ret_tmpfile_path) { | |
834 | ||
835 | #if ENABLE_GSHADOW | |
836 | _cleanup_fclose_ FILE *original = NULL, *gshadow = NULL; | |
837 | _cleanup_(unlink_and_freep) char *gshadow_tmp = NULL; | |
838 | bool group_changed = false; | |
839 | Item *i; | |
840 | int r; | |
841 | ||
842 | assert(c); | |
843 | ||
844 | if (ordered_hashmap_isempty(c->todo_gids) && ordered_hashmap_isempty(c->members)) | |
845 | return 0; | |
846 | ||
847 | if (arg_dry_run) { | |
848 | log_info("Would write /etc/gshadow%s", special_glyph(SPECIAL_GLYPH_ELLIPSIS)); | |
849 | return 0; | |
850 | } | |
851 | ||
852 | r = fopen_temporary_label("/etc/gshadow", gshadow_path, &gshadow, &gshadow_tmp); | |
853 | if (r < 0) | |
854 | return log_error_errno(r, "Failed to open temporary copy of %s: %m", gshadow_path); | |
855 | ||
856 | original = fopen(gshadow_path, "re"); | |
857 | if (original) { | |
858 | struct sgrp *sg; | |
859 | ||
860 | r = copy_rights_with_fallback(fileno(original), fileno(gshadow), gshadow_tmp); | |
861 | if (r < 0) | |
862 | return log_error_errno(r, "Failed to copy permissions from %s to %s: %m", | |
863 | gshadow_path, gshadow_tmp); | |
864 | ||
865 | while ((r = fgetsgent_sane(original, &sg)) > 0) { | |
866 | ||
867 | i = ordered_hashmap_get(c->groups, sg->sg_namp); | |
868 | if (i && i->todo_group) | |
869 | return log_error_errno(SYNTHETIC_ERRNO(EEXIST), | |
870 | "%s: Group \"%s\" already exists.", | |
871 | gshadow_path, sg->sg_namp); | |
872 | ||
873 | r = putsgent_with_members(c, sg, gshadow); | |
874 | if (r < 0) | |
875 | return log_error_errno(r, "Failed to add existing group \"%s\" to temporary gshadow file: %m", | |
876 | sg->sg_namp); | |
877 | if (r > 0) | |
878 | group_changed = true; | |
879 | } | |
880 | if (r < 0) | |
881 | return r; | |
882 | ||
883 | } else { | |
884 | if (errno != ENOENT) | |
885 | return log_error_errno(errno, "Failed to open %s: %m", gshadow_path); | |
886 | if (fchmod(fileno(gshadow), 0000) < 0) | |
887 | return log_error_errno(errno, "Failed to fchmod %s: %m", gshadow_tmp); | |
888 | } | |
889 | ||
890 | ORDERED_HASHMAP_FOREACH(i, c->todo_gids) { | |
891 | struct sgrp n = { | |
892 | .sg_namp = i->name, | |
893 | .sg_passwd = (char*) PASSWORD_LOCKED_AND_INVALID, | |
894 | }; | |
895 | ||
896 | r = putsgent_with_members(c, &n, gshadow); | |
897 | if (r < 0) | |
898 | return log_error_errno(r, "Failed to add new group \"%s\" to temporary gshadow file: %m", | |
899 | n.sg_namp); | |
900 | ||
901 | group_changed = true; | |
902 | } | |
903 | ||
904 | r = fflush_sync_and_check(gshadow); | |
905 | if (r < 0) | |
906 | return log_error_errno(r, "Failed to flush %s: %m", gshadow_tmp); | |
907 | ||
908 | if (group_changed) { | |
909 | *ret_tmpfile = TAKE_PTR(gshadow); | |
910 | *ret_tmpfile_path = TAKE_PTR(gshadow_tmp); | |
911 | } | |
912 | #endif | |
913 | return 0; | |
914 | } | |
915 | ||
916 | static int write_files(Context *c) { | |
917 | _cleanup_fclose_ FILE *passwd = NULL, *group = NULL, *shadow = NULL, *gshadow = NULL; | |
918 | _cleanup_(unlink_and_freep) char *passwd_tmp = NULL, *group_tmp = NULL, *shadow_tmp = NULL, *gshadow_tmp = NULL; | |
919 | int r; | |
920 | ||
921 | const char | |
922 | *passwd_path = prefix_roota(arg_root, "/etc/passwd"), | |
923 | *shadow_path = prefix_roota(arg_root, "/etc/shadow"), | |
924 | *group_path = prefix_roota(arg_root, "/etc/group"), | |
925 | *gshadow_path = prefix_roota(arg_root, "/etc/gshadow"); | |
926 | ||
927 | assert(c); | |
928 | ||
929 | r = write_temporary_group(c, group_path, &group, &group_tmp); | |
930 | if (r < 0) | |
931 | return r; | |
932 | ||
933 | r = write_temporary_gshadow(c, gshadow_path, &gshadow, &gshadow_tmp); | |
934 | if (r < 0) | |
935 | return r; | |
936 | ||
937 | r = write_temporary_passwd(c, passwd_path, &passwd, &passwd_tmp); | |
938 | if (r < 0) | |
939 | return r; | |
940 | ||
941 | r = write_temporary_shadow(c, shadow_path, &shadow, &shadow_tmp); | |
942 | if (r < 0) | |
943 | return r; | |
944 | ||
945 | /* Make a backup of the old files */ | |
946 | if (group) { | |
947 | r = make_backup("/etc/group", group_path); | |
948 | if (r < 0) | |
949 | return log_error_errno(r, "Failed to backup %s: %m", group_path); | |
950 | } | |
951 | if (gshadow) { | |
952 | r = make_backup("/etc/gshadow", gshadow_path); | |
953 | if (r < 0) | |
954 | return log_error_errno(r, "Failed to backup %s: %m", gshadow_path); | |
955 | } | |
956 | ||
957 | if (passwd) { | |
958 | r = make_backup("/etc/passwd", passwd_path); | |
959 | if (r < 0) | |
960 | return log_error_errno(r, "Failed to backup %s: %m", passwd_path); | |
961 | } | |
962 | if (shadow) { | |
963 | r = make_backup("/etc/shadow", shadow_path); | |
964 | if (r < 0) | |
965 | return log_error_errno(r, "Failed to backup %s: %m", shadow_path); | |
966 | } | |
967 | ||
968 | /* And make the new files count */ | |
969 | if (group) { | |
970 | r = rename_and_apply_smack_floor_label(group_tmp, group_path); | |
971 | if (r < 0) | |
972 | return log_error_errno(r, "Failed to rename %s to %s: %m", | |
973 | group_tmp, group_path); | |
974 | group_tmp = mfree(group_tmp); | |
975 | ||
976 | if (!arg_root && !arg_image) | |
977 | (void) nscd_flush_cache(STRV_MAKE("group")); | |
978 | } | |
979 | if (gshadow) { | |
980 | r = rename_and_apply_smack_floor_label(gshadow_tmp, gshadow_path); | |
981 | if (r < 0) | |
982 | return log_error_errno(r, "Failed to rename %s to %s: %m", | |
983 | gshadow_tmp, gshadow_path); | |
984 | ||
985 | gshadow_tmp = mfree(gshadow_tmp); | |
986 | } | |
987 | ||
988 | if (passwd) { | |
989 | r = rename_and_apply_smack_floor_label(passwd_tmp, passwd_path); | |
990 | if (r < 0) | |
991 | return log_error_errno(r, "Failed to rename %s to %s: %m", | |
992 | passwd_tmp, passwd_path); | |
993 | ||
994 | passwd_tmp = mfree(passwd_tmp); | |
995 | ||
996 | if (!arg_root && !arg_image) | |
997 | (void) nscd_flush_cache(STRV_MAKE("passwd")); | |
998 | } | |
999 | if (shadow) { | |
1000 | r = rename_and_apply_smack_floor_label(shadow_tmp, shadow_path); | |
1001 | if (r < 0) | |
1002 | return log_error_errno(r, "Failed to rename %s to %s: %m", | |
1003 | shadow_tmp, shadow_path); | |
1004 | ||
1005 | shadow_tmp = mfree(shadow_tmp); | |
1006 | } | |
1007 | ||
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | static int uid_is_ok( | |
1012 | Context *c, | |
1013 | uid_t uid, | |
1014 | const char *name, | |
1015 | bool check_with_gid) { | |
1016 | ||
1017 | int r; | |
1018 | assert(c); | |
1019 | ||
1020 | /* Let's see if we already have assigned the UID a second time */ | |
1021 | if (ordered_hashmap_get(c->todo_uids, UID_TO_PTR(uid))) | |
1022 | return 0; | |
1023 | ||
1024 | /* Try to avoid using uids that are already used by a group | |
1025 | * that doesn't have the same name as our new user. */ | |
1026 | if (check_with_gid) { | |
1027 | Item *i; | |
1028 | ||
1029 | i = ordered_hashmap_get(c->todo_gids, GID_TO_PTR(uid)); | |
1030 | if (i && !streq(i->name, name)) | |
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | /* Let's check the files directly */ | |
1035 | if (hashmap_contains(c->database_by_uid, UID_TO_PTR(uid))) | |
1036 | return 0; | |
1037 | ||
1038 | if (check_with_gid) { | |
1039 | const char *n; | |
1040 | ||
1041 | n = hashmap_get(c->database_by_gid, GID_TO_PTR(uid)); | |
1042 | if (n && !streq(n, name)) | |
1043 | return 0; | |
1044 | } | |
1045 | ||
1046 | /* Let's also check via NSS, to avoid UID clashes over LDAP and such, just in case */ | |
1047 | if (!arg_root) { | |
1048 | _cleanup_free_ struct group *g = NULL; | |
1049 | ||
1050 | r = getpwuid_malloc(uid, /* ret= */ NULL); | |
1051 | if (r >= 0) | |
1052 | return 0; | |
1053 | if (r != -ESRCH) | |
1054 | return r; | |
1055 | ||
1056 | if (check_with_gid) { | |
1057 | r = getgrgid_malloc((gid_t) uid, &g); | |
1058 | if (r >= 0) { | |
1059 | if (!streq(g->gr_name, name)) | |
1060 | return 0; | |
1061 | } else if (r != -ESRCH) | |
1062 | return r; | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | return 1; | |
1067 | } | |
1068 | ||
1069 | static int root_stat(const char *p, struct stat *st) { | |
1070 | const char *fix; | |
1071 | ||
1072 | fix = prefix_roota(arg_root, p); | |
1073 | return RET_NERRNO(stat(fix, st)); | |
1074 | } | |
1075 | ||
1076 | static int read_id_from_file(Item *i, uid_t *ret_uid, gid_t *ret_gid) { | |
1077 | struct stat st; | |
1078 | bool found_uid = false, found_gid = false; | |
1079 | uid_t uid = 0; | |
1080 | gid_t gid = 0; | |
1081 | ||
1082 | assert(i); | |
1083 | ||
1084 | /* First, try to get the GID directly */ | |
1085 | if (ret_gid && i->gid_path && root_stat(i->gid_path, &st) >= 0) { | |
1086 | gid = st.st_gid; | |
1087 | found_gid = true; | |
1088 | } | |
1089 | ||
1090 | /* Then, try to get the UID directly */ | |
1091 | if ((ret_uid || (ret_gid && !found_gid)) | |
1092 | && i->uid_path | |
1093 | && root_stat(i->uid_path, &st) >= 0) { | |
1094 | ||
1095 | uid = st.st_uid; | |
1096 | found_uid = true; | |
1097 | ||
1098 | /* If we need the gid, but had no success yet, also derive it from the UID path */ | |
1099 | if (ret_gid && !found_gid) { | |
1100 | gid = st.st_gid; | |
1101 | found_gid = true; | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | /* If that didn't work yet, then let's reuse the GID as UID */ | |
1106 | if (ret_uid && !found_uid && i->gid_path) { | |
1107 | ||
1108 | if (found_gid) { | |
1109 | uid = (uid_t) gid; | |
1110 | found_uid = true; | |
1111 | } else if (root_stat(i->gid_path, &st) >= 0) { | |
1112 | uid = (uid_t) st.st_gid; | |
1113 | found_uid = true; | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | if (ret_uid) { | |
1118 | if (!found_uid) | |
1119 | return 0; | |
1120 | ||
1121 | *ret_uid = uid; | |
1122 | } | |
1123 | ||
1124 | if (ret_gid) { | |
1125 | if (!found_gid) | |
1126 | return 0; | |
1127 | ||
1128 | *ret_gid = gid; | |
1129 | } | |
1130 | ||
1131 | return 1; | |
1132 | } | |
1133 | ||
1134 | static int add_user(Context *c, Item *i) { | |
1135 | void *z; | |
1136 | int r; | |
1137 | ||
1138 | assert(c); | |
1139 | assert(i); | |
1140 | ||
1141 | /* Check the database directly */ | |
1142 | z = hashmap_get(c->database_by_username, i->name); | |
1143 | if (z) { | |
1144 | log_debug("User %s already exists.", i->name); | |
1145 | i->uid = PTR_TO_UID(z); | |
1146 | i->uid_set = true; | |
1147 | return 0; | |
1148 | } | |
1149 | ||
1150 | if (!arg_root) { | |
1151 | _cleanup_free_ struct passwd *p = NULL; | |
1152 | ||
1153 | /* Also check NSS */ | |
1154 | r = getpwnam_malloc(i->name, &p); | |
1155 | if (r >= 0) { | |
1156 | log_debug("User %s already exists.", i->name); | |
1157 | i->uid = p->pw_uid; | |
1158 | i->uid_set = true; | |
1159 | ||
1160 | r = free_and_strdup(&i->description, p->pw_gecos); | |
1161 | if (r < 0) | |
1162 | return log_oom(); | |
1163 | ||
1164 | return 0; | |
1165 | } | |
1166 | if (r != -ESRCH) | |
1167 | return log_error_errno(r, "Failed to check if user %s already exists: %m", i->name); | |
1168 | } | |
1169 | ||
1170 | /* Try to use the suggested numeric UID */ | |
1171 | if (i->uid_set) { | |
1172 | r = uid_is_ok(c, i->uid, i->name, !i->id_set_strict); | |
1173 | if (r < 0) | |
1174 | return log_error_errno(r, "Failed to verify UID " UID_FMT ": %m", i->uid); | |
1175 | if (r == 0) { | |
1176 | log_info("Suggested user ID " UID_FMT " for %s already used.", i->uid, i->name); | |
1177 | i->uid_set = false; | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | /* If that didn't work, try to read it from the specified path */ | |
1182 | if (!i->uid_set) { | |
1183 | uid_t candidate; | |
1184 | ||
1185 | if (read_id_from_file(i, &candidate, NULL) > 0) { | |
1186 | ||
1187 | if (candidate <= 0 || !uid_range_contains(c->uid_range, candidate)) | |
1188 | log_debug("User ID " UID_FMT " of file not suitable for %s.", candidate, i->name); | |
1189 | else { | |
1190 | r = uid_is_ok(c, candidate, i->name, true); | |
1191 | if (r < 0) | |
1192 | return log_error_errno(r, "Failed to verify UID " UID_FMT ": %m", i->uid); | |
1193 | else if (r > 0) { | |
1194 | i->uid = candidate; | |
1195 | i->uid_set = true; | |
1196 | } else | |
1197 | log_debug("User ID " UID_FMT " of file for %s is already used.", candidate, i->name); | |
1198 | } | |
1199 | } | |
1200 | } | |
1201 | ||
1202 | /* Otherwise, try to reuse the group ID */ | |
1203 | if (!i->uid_set && i->gid_set) { | |
1204 | r = uid_is_ok(c, (uid_t) i->gid, i->name, true); | |
1205 | if (r < 0) | |
1206 | return log_error_errno(r, "Failed to verify UID " UID_FMT ": %m", i->uid); | |
1207 | if (r > 0) { | |
1208 | i->uid = (uid_t) i->gid; | |
1209 | i->uid_set = true; | |
1210 | } | |
1211 | } | |
1212 | ||
1213 | /* And if that didn't work either, let's try to find a free one */ | |
1214 | if (!i->uid_set) { | |
1215 | maybe_emit_login_defs_warning(c); | |
1216 | ||
1217 | for (;;) { | |
1218 | r = uid_range_next_lower(c->uid_range, &c->search_uid); | |
1219 | if (r < 0) | |
1220 | return log_error_errno(r, "No free user ID available for %s.", i->name); | |
1221 | ||
1222 | r = uid_is_ok(c, c->search_uid, i->name, true); | |
1223 | if (r < 0) | |
1224 | return log_error_errno(r, "Failed to verify UID " UID_FMT ": %m", i->uid); | |
1225 | else if (r > 0) | |
1226 | break; | |
1227 | } | |
1228 | ||
1229 | i->uid_set = true; | |
1230 | i->uid = c->search_uid; | |
1231 | } | |
1232 | ||
1233 | r = ordered_hashmap_ensure_put(&c->todo_uids, NULL, UID_TO_PTR(i->uid), i); | |
1234 | if (r == -EEXIST) | |
1235 | return log_error_errno(r, "Requested user %s with UID " UID_FMT " and gid" GID_FMT " to be created is duplicated " | |
1236 | "or conflicts with another user.", i->name, i->uid, i->gid); | |
1237 | if (r == -ENOMEM) | |
1238 | return log_oom(); | |
1239 | if (r < 0) | |
1240 | return log_error_errno(r, "Failed to store user %s with UID " UID_FMT " and GID " GID_FMT " to be created: %m", | |
1241 | i->name, i->uid, i->gid); | |
1242 | ||
1243 | i->todo_user = true; | |
1244 | log_info("Creating user '%s' (%s) with UID " UID_FMT " and GID " GID_FMT ".", | |
1245 | i->name, strna(i->description), i->uid, i->gid); | |
1246 | ||
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | static int gid_is_ok( | |
1251 | Context *c, | |
1252 | gid_t gid, | |
1253 | const char *groupname, | |
1254 | bool check_with_uid) { | |
1255 | ||
1256 | Item *user; | |
1257 | char *username; | |
1258 | int r; | |
1259 | ||
1260 | assert(c); | |
1261 | assert(groupname); | |
1262 | ||
1263 | if (ordered_hashmap_get(c->todo_gids, GID_TO_PTR(gid))) | |
1264 | return 0; | |
1265 | ||
1266 | /* Avoid reusing gids that are already used by a different user */ | |
1267 | if (check_with_uid) { | |
1268 | user = ordered_hashmap_get(c->todo_uids, UID_TO_PTR(gid)); | |
1269 | if (user && !streq(user->name, groupname)) | |
1270 | return 0; | |
1271 | } | |
1272 | ||
1273 | if (hashmap_contains(c->database_by_gid, GID_TO_PTR(gid))) | |
1274 | return 0; | |
1275 | ||
1276 | if (check_with_uid) { | |
1277 | username = hashmap_get(c->database_by_uid, UID_TO_PTR(gid)); | |
1278 | if (username && !streq(username, groupname)) | |
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | if (!arg_root) { | |
1283 | r = getgrgid_malloc(gid, /* ret= */ NULL); | |
1284 | if (r >= 0) | |
1285 | return 0; | |
1286 | if (r != -ESRCH) | |
1287 | return r; | |
1288 | ||
1289 | if (check_with_uid) { | |
1290 | r = getpwuid_malloc(gid, /* ret= */ NULL); | |
1291 | if (r >= 0) | |
1292 | return 0; | |
1293 | if (r != -ESRCH) | |
1294 | return r; | |
1295 | } | |
1296 | } | |
1297 | ||
1298 | return 1; | |
1299 | } | |
1300 | ||
1301 | static int get_gid_by_name( | |
1302 | Context *c, | |
1303 | const char *name, | |
1304 | gid_t *ret_gid) { | |
1305 | ||
1306 | void *z; | |
1307 | int r; | |
1308 | ||
1309 | assert(c); | |
1310 | assert(ret_gid); | |
1311 | ||
1312 | /* Check the database directly */ | |
1313 | z = hashmap_get(c->database_by_groupname, name); | |
1314 | if (z) { | |
1315 | *ret_gid = PTR_TO_GID(z); | |
1316 | return 0; | |
1317 | } | |
1318 | ||
1319 | /* Also check NSS */ | |
1320 | if (!arg_root) { | |
1321 | _cleanup_free_ struct group *g = NULL; | |
1322 | ||
1323 | r = getgrnam_malloc(name, &g); | |
1324 | if (r >= 0) { | |
1325 | *ret_gid = g->gr_gid; | |
1326 | return 0; | |
1327 | } | |
1328 | if (r != -ESRCH) | |
1329 | return log_error_errno(r, "Failed to check if group %s already exists: %m", name); | |
1330 | } | |
1331 | ||
1332 | return -ENOENT; | |
1333 | } | |
1334 | ||
1335 | static int add_group(Context *c, Item *i) { | |
1336 | int r; | |
1337 | ||
1338 | assert(c); | |
1339 | assert(i); | |
1340 | ||
1341 | r = get_gid_by_name(c, i->name, &i->gid); | |
1342 | if (r != -ENOENT) { | |
1343 | if (r < 0) | |
1344 | return r; | |
1345 | log_debug("Group %s already exists.", i->name); | |
1346 | i->gid_set = true; | |
1347 | return 0; | |
1348 | } | |
1349 | ||
1350 | /* Try to use the suggested numeric GID */ | |
1351 | if (i->gid_set) { | |
1352 | r = gid_is_ok(c, i->gid, i->name, false); | |
1353 | if (r < 0) | |
1354 | return log_error_errno(r, "Failed to verify GID " GID_FMT ": %m", i->gid); | |
1355 | if (i->id_set_strict) { | |
1356 | /* If we require the GID to already exist we can return here: | |
1357 | * r > 0: means the GID does not exist -> fail | |
1358 | * r == 0: means the GID exists -> nothing more to do. | |
1359 | */ | |
1360 | if (r > 0) | |
1361 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
1362 | "Failed to create %s: please create GID " GID_FMT, | |
1363 | i->name, i->gid); | |
1364 | if (r == 0) | |
1365 | return 0; | |
1366 | } | |
1367 | if (r == 0) { | |
1368 | log_info("Suggested group ID " GID_FMT " for %s already used.", i->gid, i->name); | |
1369 | i->gid_set = false; | |
1370 | } | |
1371 | } | |
1372 | ||
1373 | /* Try to reuse the numeric uid, if there's one */ | |
1374 | if (!i->gid_set && i->uid_set) { | |
1375 | r = gid_is_ok(c, (gid_t) i->uid, i->name, true); | |
1376 | if (r < 0) | |
1377 | return log_error_errno(r, "Failed to verify GID " GID_FMT ": %m", i->gid); | |
1378 | if (r > 0) { | |
1379 | i->gid = (gid_t) i->uid; | |
1380 | i->gid_set = true; | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | /* If that didn't work, try to read it from the specified path */ | |
1385 | if (!i->gid_set) { | |
1386 | gid_t candidate; | |
1387 | ||
1388 | if (read_id_from_file(i, NULL, &candidate) > 0) { | |
1389 | ||
1390 | if (candidate <= 0 || !uid_range_contains(c->uid_range, candidate)) | |
1391 | log_debug("Group ID " GID_FMT " of file not suitable for %s.", candidate, i->name); | |
1392 | else { | |
1393 | r = gid_is_ok(c, candidate, i->name, true); | |
1394 | if (r < 0) | |
1395 | return log_error_errno(r, "Failed to verify GID " GID_FMT ": %m", i->gid); | |
1396 | else if (r > 0) { | |
1397 | i->gid = candidate; | |
1398 | i->gid_set = true; | |
1399 | } else | |
1400 | log_debug("Group ID " GID_FMT " of file for %s already used.", candidate, i->name); | |
1401 | } | |
1402 | } | |
1403 | } | |
1404 | ||
1405 | /* And if that didn't work either, let's try to find a free one */ | |
1406 | if (!i->gid_set) { | |
1407 | maybe_emit_login_defs_warning(c); | |
1408 | ||
1409 | for (;;) { | |
1410 | /* We look for new GIDs in the UID pool! */ | |
1411 | r = uid_range_next_lower(c->uid_range, &c->search_uid); | |
1412 | if (r < 0) | |
1413 | return log_error_errno(r, "No free group ID available for %s.", i->name); | |
1414 | ||
1415 | r = gid_is_ok(c, c->search_uid, i->name, true); | |
1416 | if (r < 0) | |
1417 | return log_error_errno(r, "Failed to verify GID " GID_FMT ": %m", i->gid); | |
1418 | else if (r > 0) | |
1419 | break; | |
1420 | } | |
1421 | ||
1422 | i->gid_set = true; | |
1423 | i->gid = c->search_uid; | |
1424 | } | |
1425 | ||
1426 | r = ordered_hashmap_ensure_put(&c->todo_gids, NULL, GID_TO_PTR(i->gid), i); | |
1427 | if (r == -EEXIST) | |
1428 | return log_error_errno(r, "Requested group %s with GID "GID_FMT " to be created is duplicated or conflicts with another user.", i->name, i->gid); | |
1429 | if (r == -ENOMEM) | |
1430 | return log_oom(); | |
1431 | if (r < 0) | |
1432 | return log_error_errno(r, "Failed to store group %s with GID " GID_FMT " to be created: %m", i->name, i->gid); | |
1433 | ||
1434 | i->todo_group = true; | |
1435 | log_info("Creating group '%s' with GID " GID_FMT ".", i->name, i->gid); | |
1436 | ||
1437 | return 0; | |
1438 | } | |
1439 | ||
1440 | static int process_item(Context *c, Item *i) { | |
1441 | int r; | |
1442 | ||
1443 | assert(c); | |
1444 | assert(i); | |
1445 | ||
1446 | switch (i->type) { | |
1447 | ||
1448 | case ADD_USER: { | |
1449 | Item *j = NULL; | |
1450 | ||
1451 | if (!i->gid_set) | |
1452 | j = ordered_hashmap_get(c->groups, i->group_name ?: i->name); | |
1453 | ||
1454 | if (j && j->todo_group) { | |
1455 | /* When a group with the target name is already in queue, | |
1456 | * use the information about the group and do not create | |
1457 | * duplicated group entry. */ | |
1458 | i->gid_set = j->gid_set; | |
1459 | i->gid = j->gid; | |
1460 | i->id_set_strict = true; | |
1461 | } else if (i->group_name) { | |
1462 | /* When a group name was given instead of a GID and it's | |
1463 | * not in queue, then it must already exist. */ | |
1464 | r = get_gid_by_name(c, i->group_name, &i->gid); | |
1465 | if (r < 0) | |
1466 | return log_error_errno(r, "Group %s not found.", i->group_name); | |
1467 | i->gid_set = true; | |
1468 | i->id_set_strict = true; | |
1469 | } else { | |
1470 | r = add_group(c, i); | |
1471 | if (r < 0) | |
1472 | return r; | |
1473 | } | |
1474 | ||
1475 | return add_user(c, i); | |
1476 | } | |
1477 | ||
1478 | case ADD_GROUP: | |
1479 | return add_group(c, i); | |
1480 | ||
1481 | default: | |
1482 | assert_not_reached(); | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | static Item* item_free(Item *i) { | |
1487 | if (!i) | |
1488 | return NULL; | |
1489 | ||
1490 | free(i->name); | |
1491 | free(i->group_name); | |
1492 | free(i->uid_path); | |
1493 | free(i->gid_path); | |
1494 | free(i->description); | |
1495 | free(i->home); | |
1496 | free(i->shell); | |
1497 | free(i->filename); | |
1498 | return mfree(i); | |
1499 | } | |
1500 | ||
1501 | DEFINE_TRIVIAL_CLEANUP_FUNC(Item*, item_free); | |
1502 | DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(item_hash_ops, char, string_hash_func, string_compare_func, Item, item_free); | |
1503 | ||
1504 | static Item* item_new(ItemType type, const char *name, const char *filename, unsigned line) { | |
1505 | assert(name); | |
1506 | assert(!!filename == (line > 0)); | |
1507 | ||
1508 | _cleanup_(item_freep) Item *new = new(Item, 1); | |
1509 | if (!new) | |
1510 | return NULL; | |
1511 | ||
1512 | *new = (Item) { | |
1513 | .type = type, | |
1514 | .line = line, | |
1515 | }; | |
1516 | ||
1517 | if (free_and_strdup(&new->name, name) < 0 || | |
1518 | free_and_strdup(&new->filename, filename) < 0) | |
1519 | return NULL; | |
1520 | ||
1521 | return TAKE_PTR(new); | |
1522 | } | |
1523 | ||
1524 | static int add_implicit(Context *c) { | |
1525 | char *g, **l; | |
1526 | int r; | |
1527 | ||
1528 | assert(c); | |
1529 | ||
1530 | /* Implicitly create additional users and groups, if they were listed in "m" lines */ | |
1531 | ORDERED_HASHMAP_FOREACH_KEY(l, g, c->members) { | |
1532 | STRV_FOREACH(m, l) | |
1533 | if (!ordered_hashmap_get(c->users, *m)) { | |
1534 | _cleanup_(item_freep) Item *j = | |
1535 | item_new(ADD_USER, *m, /* filename= */ NULL, /* line= */ 0); | |
1536 | if (!j) | |
1537 | return log_oom(); | |
1538 | ||
1539 | r = ordered_hashmap_ensure_put(&c->users, &item_hash_ops, j->name, j); | |
1540 | if (r == -ENOMEM) | |
1541 | return log_oom(); | |
1542 | if (r < 0) | |
1543 | return log_error_errno(r, "Failed to add implicit user '%s': %m", j->name); | |
1544 | ||
1545 | log_debug("Adding implicit user '%s' due to m line", j->name); | |
1546 | TAKE_PTR(j); | |
1547 | } | |
1548 | ||
1549 | if (!(ordered_hashmap_get(c->users, g) || | |
1550 | ordered_hashmap_get(c->groups, g))) { | |
1551 | _cleanup_(item_freep) Item *j = | |
1552 | item_new(ADD_GROUP, g, /* filename= */ NULL, /* line= */ 0); | |
1553 | if (!j) | |
1554 | return log_oom(); | |
1555 | ||
1556 | r = ordered_hashmap_ensure_put(&c->groups, &item_hash_ops, j->name, j); | |
1557 | if (r == -ENOMEM) | |
1558 | return log_oom(); | |
1559 | if (r < 0) | |
1560 | return log_error_errno(r, "Failed to add implicit group '%s': %m", j->name); | |
1561 | ||
1562 | log_debug("Adding implicit group '%s' due to m line", j->name); | |
1563 | TAKE_PTR(j); | |
1564 | } | |
1565 | } | |
1566 | ||
1567 | return 0; | |
1568 | } | |
1569 | ||
1570 | static int item_equivalent(Item *a, Item *b) { | |
1571 | int r; | |
1572 | ||
1573 | assert(a); | |
1574 | assert(b); | |
1575 | ||
1576 | if (a->type != b->type) { | |
1577 | log_syntax(NULL, LOG_DEBUG, a->filename, a->line, 0, | |
1578 | "Item not equivalent because types differ"); | |
1579 | return false; | |
1580 | } | |
1581 | ||
1582 | if (!streq_ptr(a->name, b->name)) { | |
1583 | log_syntax(NULL, LOG_DEBUG, a->filename, a->line, 0, | |
1584 | "Item not equivalent because names differ ('%s' vs. '%s')", | |
1585 | a->name, b->name); | |
1586 | return false; | |
1587 | } | |
1588 | ||
1589 | /* Paths were simplified previously, so we can use streq. */ | |
1590 | if (!streq_ptr(a->uid_path, b->uid_path)) { | |
1591 | log_syntax(NULL, LOG_DEBUG, a->filename, a->line, 0, | |
1592 | "Item not equivalent because UID paths differ (%s vs. %s)", | |
1593 | a->uid_path ?: "(unset)", b->uid_path ?: "(unset)"); | |
1594 | return false; | |
1595 | } | |
1596 | ||
1597 | if (!streq_ptr(a->gid_path, b->gid_path)) { | |
1598 | log_syntax(NULL, LOG_DEBUG, a->filename, a->line, 0, | |
1599 | "Item not equivalent because GID paths differ (%s vs. %s)", | |
1600 | a->gid_path ?: "(unset)", b->gid_path ?: "(unset)"); | |
1601 | return false; | |
1602 | } | |
1603 | ||
1604 | if (!streq_ptr(a->description, b->description)) { | |
1605 | log_syntax(NULL, LOG_DEBUG, a->filename, a->line, 0, | |
1606 | "Item not equivalent because descriptions differ ('%s' vs. '%s')", | |
1607 | strempty(a->description), strempty(b->description)); | |
1608 | return false; | |
1609 | } | |
1610 | ||
1611 | if ((a->uid_set != b->uid_set) || | |
1612 | (a->uid_set && a->uid != b->uid)) { | |
1613 | log_syntax(NULL, LOG_DEBUG, a->filename, a->line, 0, | |
1614 | "Item not equivalent because UIDs differ (%s vs. %s)", | |
1615 | a->uid_set ? FORMAT_UID(a->uid) : "(unset)", | |
1616 | b->uid_set ? FORMAT_UID(b->uid) : "(unset)"); | |
1617 | return false; | |
1618 | } | |
1619 | ||
1620 | if ((a->gid_set != b->gid_set) || | |
1621 | (a->gid_set && a->gid != b->gid)) { | |
1622 | log_syntax(NULL, LOG_DEBUG, a->filename, a->line, 0, | |
1623 | "Item not equivalent because GIDs differ (%s vs. %s)", | |
1624 | a->gid_set ? FORMAT_GID(a->gid) : "(unset)", | |
1625 | b->gid_set ? FORMAT_GID(b->gid) : "(unset)"); | |
1626 | return false; | |
1627 | } | |
1628 | ||
1629 | if (!streq_ptr(a->home, b->home)) { | |
1630 | log_syntax(NULL, LOG_DEBUG, a->filename, a->line, 0, | |
1631 | "Item not equivalent because home directories differ ('%s' vs. '%s')", | |
1632 | strempty(a->description), strempty(b->description)); | |
1633 | return false; | |
1634 | } | |
1635 | ||
1636 | /* Check if the two paths refer to the same file. | |
1637 | * If the paths are equal (after normalization), it's obviously the same file. | |
1638 | * If both paths specify a nologin shell, treat them as the same (e.g. /bin/true and /bin/false). | |
1639 | * Otherwise, try to resolve the paths, and see if we get the same result, (e.g. /sbin/nologin and | |
1640 | * /usr/sbin/nologin). | |
1641 | * If we can't resolve something, treat different paths as different. */ | |
1642 | ||
1643 | const char *a_shell = pick_shell(a), | |
1644 | *b_shell = pick_shell(b); | |
1645 | if (!path_equal_ptr(a_shell, b_shell) && | |
1646 | !(is_nologin_shell(a_shell) && is_nologin_shell(b_shell))) { | |
1647 | _cleanup_free_ char *pa = NULL, *pb = NULL; | |
1648 | ||
1649 | r = chase(a_shell, arg_root, CHASE_PREFIX_ROOT | CHASE_NONEXISTENT, &pa, NULL); | |
1650 | if (r < 0) { | |
1651 | log_full_errno(ERRNO_IS_RESOURCE(r) ? LOG_ERR : LOG_DEBUG, | |
1652 | r, "Failed to look up path '%s%s%s': %m", | |
1653 | strempty(arg_root), arg_root ? "/" : "", a_shell); | |
1654 | return ERRNO_IS_RESOURCE(r) ? r : false; | |
1655 | } | |
1656 | ||
1657 | r = chase(b_shell, arg_root, CHASE_PREFIX_ROOT | CHASE_NONEXISTENT, &pb, NULL); | |
1658 | if (r < 0) { | |
1659 | log_full_errno(ERRNO_IS_RESOURCE(r) ? LOG_ERR : LOG_DEBUG, | |
1660 | r, "Failed to look up path '%s%s%s': %m", | |
1661 | strempty(arg_root), arg_root ? "/" : "", b_shell); | |
1662 | return ERRNO_IS_RESOURCE(r) ? r : false; | |
1663 | } | |
1664 | ||
1665 | if (!path_equal(pa, pb)) { | |
1666 | log_syntax(NULL, LOG_DEBUG, a->filename, a->line, 0, | |
1667 | "Item not equivalent because shells differ ('%s' vs. '%s')", | |
1668 | pa, pb); | |
1669 | return false; | |
1670 | } | |
1671 | } | |
1672 | ||
1673 | return true; | |
1674 | } | |
1675 | ||
1676 | static int parse_line( | |
1677 | const char *fname, | |
1678 | unsigned line, | |
1679 | const char *buffer, | |
1680 | bool *invalid_config, | |
1681 | void *context) { | |
1682 | ||
1683 | Context *c = ASSERT_PTR(context); | |
1684 | _cleanup_free_ char *action = NULL, | |
1685 | *name = NULL, *resolved_name = NULL, | |
1686 | *id = NULL, *resolved_id = NULL, | |
1687 | *description = NULL, *resolved_description = NULL, | |
1688 | *home = NULL, *resolved_home = NULL, | |
1689 | *shell = NULL, *resolved_shell = NULL; | |
1690 | _cleanup_(item_freep) Item *i = NULL; | |
1691 | Item *existing; | |
1692 | OrderedHashmap *h; | |
1693 | int r; | |
1694 | const char *p; | |
1695 | ||
1696 | assert(fname); | |
1697 | assert(line >= 1); | |
1698 | assert(buffer); | |
1699 | assert(!invalid_config); /* We don't support invalid_config yet. */ | |
1700 | ||
1701 | /* Parse columns */ | |
1702 | p = buffer; | |
1703 | r = extract_many_words(&p, NULL, EXTRACT_UNQUOTE, | |
1704 | &action, &name, &id, &description, &home, &shell, NULL); | |
1705 | if (r < 0) | |
1706 | return log_syntax(NULL, LOG_ERR, fname, line, r, "Syntax error."); | |
1707 | if (r < 2) | |
1708 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1709 | "Missing action and name columns."); | |
1710 | if (!isempty(p)) | |
1711 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1712 | "Trailing garbage."); | |
1713 | ||
1714 | /* Verify action */ | |
1715 | if (strlen(action) != 1) | |
1716 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1717 | "Unknown modifier '%s'.", action); | |
1718 | ||
1719 | if (!IN_SET(action[0], ADD_USER, ADD_GROUP, ADD_MEMBER, ADD_RANGE)) | |
1720 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), | |
1721 | "Unknown command type '%c'.", action[0]); | |
1722 | ||
1723 | /* Verify name */ | |
1724 | if (empty_or_dash(name)) | |
1725 | name = mfree(name); | |
1726 | ||
1727 | if (name) { | |
1728 | r = specifier_printf(name, NAME_MAX, system_and_tmp_specifier_table, arg_root, NULL, &resolved_name); | |
1729 | if (r < 0) | |
1730 | return log_syntax(NULL, LOG_ERR, fname, line, r, "Failed to replace specifiers in '%s': %m", name); | |
1731 | ||
1732 | if (!valid_user_group_name(resolved_name, 0)) | |
1733 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1734 | "'%s' is not a valid user or group name.", resolved_name); | |
1735 | } | |
1736 | ||
1737 | /* Verify id */ | |
1738 | if (empty_or_dash(id)) | |
1739 | id = mfree(id); | |
1740 | ||
1741 | if (id) { | |
1742 | r = specifier_printf(id, PATH_MAX-1, system_and_tmp_specifier_table, arg_root, NULL, &resolved_id); | |
1743 | if (r < 0) | |
1744 | return log_syntax(NULL, LOG_ERR, fname, line, r, | |
1745 | "Failed to replace specifiers in '%s': %m", name); | |
1746 | } | |
1747 | ||
1748 | /* Verify description */ | |
1749 | if (empty_or_dash(description)) | |
1750 | description = mfree(description); | |
1751 | ||
1752 | if (description) { | |
1753 | r = specifier_printf(description, LONG_LINE_MAX, system_and_tmp_specifier_table, arg_root, NULL, &resolved_description); | |
1754 | if (r < 0) | |
1755 | return log_syntax(NULL, LOG_ERR, fname, line, r, | |
1756 | "Failed to replace specifiers in '%s': %m", description); | |
1757 | ||
1758 | if (!valid_gecos(resolved_description)) | |
1759 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1760 | "'%s' is not a valid GECOS field.", resolved_description); | |
1761 | } | |
1762 | ||
1763 | /* Verify home */ | |
1764 | if (empty_or_dash(home)) | |
1765 | home = mfree(home); | |
1766 | ||
1767 | if (home) { | |
1768 | r = specifier_printf(home, PATH_MAX-1, system_and_tmp_specifier_table, arg_root, NULL, &resolved_home); | |
1769 | if (r < 0) | |
1770 | return log_syntax(NULL, LOG_ERR, fname, line, r, | |
1771 | "Failed to replace specifiers in '%s': %m", home); | |
1772 | ||
1773 | path_simplify(resolved_home); | |
1774 | ||
1775 | if (!valid_home(resolved_home)) | |
1776 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1777 | "'%s' is not a valid home directory field.", resolved_home); | |
1778 | } | |
1779 | ||
1780 | /* Verify shell */ | |
1781 | if (empty_or_dash(shell)) | |
1782 | shell = mfree(shell); | |
1783 | ||
1784 | if (shell) { | |
1785 | r = specifier_printf(shell, PATH_MAX-1, system_and_tmp_specifier_table, arg_root, NULL, &resolved_shell); | |
1786 | if (r < 0) | |
1787 | return log_syntax(NULL, LOG_ERR, fname, line, r, | |
1788 | "Failed to replace specifiers in '%s': %m", shell); | |
1789 | ||
1790 | path_simplify(resolved_shell); | |
1791 | ||
1792 | if (!valid_shell(resolved_shell)) | |
1793 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1794 | "'%s' is not a valid login shell field.", resolved_shell); | |
1795 | } | |
1796 | ||
1797 | switch (action[0]) { | |
1798 | ||
1799 | case ADD_RANGE: | |
1800 | if (resolved_name) | |
1801 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1802 | "Lines of type 'r' don't take a name field."); | |
1803 | ||
1804 | if (!resolved_id) | |
1805 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1806 | "Lines of type 'r' require an ID range in the third field."); | |
1807 | ||
1808 | if (description || home || shell) | |
1809 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1810 | "Lines of type '%c' don't take a %s field.", | |
1811 | action[0], | |
1812 | description ? "GECOS" : home ? "home directory" : "login shell"); | |
1813 | ||
1814 | r = uid_range_add_str(&c->uid_range, resolved_id); | |
1815 | if (r < 0) | |
1816 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1817 | "Invalid UID range %s.", resolved_id); | |
1818 | ||
1819 | return 0; | |
1820 | ||
1821 | case ADD_MEMBER: { | |
1822 | /* Try to extend an existing member or group item */ | |
1823 | if (!name) | |
1824 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1825 | "Lines of type 'm' require a user name in the second field."); | |
1826 | ||
1827 | if (!resolved_id) | |
1828 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1829 | "Lines of type 'm' require a group name in the third field."); | |
1830 | ||
1831 | if (!valid_user_group_name(resolved_id, 0)) | |
1832 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1833 | "'%s' is not a valid user or group name.", resolved_id); | |
1834 | ||
1835 | if (description || home || shell) | |
1836 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1837 | "Lines of type '%c' don't take a %s field.", | |
1838 | action[0], | |
1839 | description ? "GECOS" : home ? "home directory" : "login shell"); | |
1840 | ||
1841 | r = string_strv_ordered_hashmap_put(&c->members, resolved_id, resolved_name); | |
1842 | if (r < 0) | |
1843 | return log_error_errno(r, "Failed to store mapping for %s: %m", resolved_id); | |
1844 | ||
1845 | return 0; | |
1846 | } | |
1847 | ||
1848 | case ADD_USER: | |
1849 | if (!name) | |
1850 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1851 | "Lines of type 'u' require a user name in the second field."); | |
1852 | ||
1853 | r = ordered_hashmap_ensure_allocated(&c->users, &item_hash_ops); | |
1854 | if (r < 0) | |
1855 | return log_oom(); | |
1856 | ||
1857 | i = item_new(ADD_USER, resolved_name, fname, line); | |
1858 | if (!i) | |
1859 | return log_oom(); | |
1860 | ||
1861 | if (resolved_id) { | |
1862 | if (path_is_absolute(resolved_id)) | |
1863 | i->uid_path = path_simplify(TAKE_PTR(resolved_id)); | |
1864 | else { | |
1865 | _cleanup_free_ char *uid = NULL, *gid = NULL; | |
1866 | if (split_pair(resolved_id, ":", &uid, &gid) == 0) { | |
1867 | r = parse_gid(gid, &i->gid); | |
1868 | if (r < 0) { | |
1869 | if (valid_user_group_name(gid, 0)) | |
1870 | i->group_name = TAKE_PTR(gid); | |
1871 | else | |
1872 | return log_syntax(NULL, LOG_ERR, fname, line, r, | |
1873 | "Failed to parse GID: '%s': %m", id); | |
1874 | } else { | |
1875 | i->gid_set = true; | |
1876 | i->id_set_strict = true; | |
1877 | } | |
1878 | free_and_replace(resolved_id, uid); | |
1879 | } | |
1880 | if (!streq(resolved_id, "-")) { | |
1881 | r = parse_uid(resolved_id, &i->uid); | |
1882 | if (r < 0) | |
1883 | return log_syntax(NULL, LOG_ERR, fname, line, r, | |
1884 | "Failed to parse UID: '%s': %m", id); | |
1885 | i->uid_set = true; | |
1886 | } | |
1887 | } | |
1888 | } | |
1889 | ||
1890 | i->description = TAKE_PTR(resolved_description); | |
1891 | i->home = TAKE_PTR(resolved_home); | |
1892 | i->shell = TAKE_PTR(resolved_shell); | |
1893 | ||
1894 | h = c->users; | |
1895 | break; | |
1896 | ||
1897 | case ADD_GROUP: | |
1898 | if (!name) | |
1899 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1900 | "Lines of type 'g' require a user name in the second field."); | |
1901 | ||
1902 | if (description || home || shell) | |
1903 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), | |
1904 | "Lines of type '%c' don't take a %s field.", | |
1905 | action[0], | |
1906 | description ? "GECOS" : home ? "home directory" : "login shell"); | |
1907 | ||
1908 | r = ordered_hashmap_ensure_allocated(&c->groups, &item_hash_ops); | |
1909 | if (r < 0) | |
1910 | return log_oom(); | |
1911 | ||
1912 | i = item_new(ADD_GROUP, resolved_name, fname, line); | |
1913 | if (!i) | |
1914 | return log_oom(); | |
1915 | ||
1916 | if (resolved_id) { | |
1917 | if (path_is_absolute(resolved_id)) | |
1918 | i->gid_path = path_simplify(TAKE_PTR(resolved_id)); | |
1919 | else { | |
1920 | r = parse_gid(resolved_id, &i->gid); | |
1921 | if (r < 0) | |
1922 | return log_syntax(NULL, LOG_ERR, fname, line, r, | |
1923 | "Failed to parse GID: '%s': %m", id); | |
1924 | ||
1925 | i->gid_set = true; | |
1926 | } | |
1927 | } | |
1928 | ||
1929 | h = c->groups; | |
1930 | break; | |
1931 | ||
1932 | default: | |
1933 | assert_not_reached(); | |
1934 | } | |
1935 | ||
1936 | existing = ordered_hashmap_get(h, i->name); | |
1937 | if (existing) { | |
1938 | /* Two functionally-equivalent items are fine */ | |
1939 | r = item_equivalent(i, existing); | |
1940 | if (r < 0) | |
1941 | return r; | |
1942 | if (r == 0) { | |
1943 | if (existing->filename) | |
1944 | log_syntax(NULL, LOG_WARNING, fname, line, 0, | |
1945 | "Conflict with earlier configuration for %s '%s' in %s:%u, ignoring line.", | |
1946 | item_type_to_string(i->type), | |
1947 | i->name, | |
1948 | existing->filename, existing->line); | |
1949 | else | |
1950 | log_syntax(NULL, LOG_WARNING, fname, line, 0, | |
1951 | "Conflict with earlier configuration for %s '%s', ignoring line.", | |
1952 | item_type_to_string(i->type), | |
1953 | i->name); | |
1954 | } | |
1955 | ||
1956 | return 0; | |
1957 | } | |
1958 | ||
1959 | r = ordered_hashmap_put(h, i->name, i); | |
1960 | if (r < 0) | |
1961 | return log_oom(); | |
1962 | ||
1963 | i = NULL; | |
1964 | return 0; | |
1965 | } | |
1966 | ||
1967 | static int read_config_file(Context *c, const char *fn, bool ignore_enoent) { | |
1968 | return conf_file_read( | |
1969 | arg_root, | |
1970 | (const char**) CONF_PATHS_STRV("sysusers.d"), | |
1971 | ASSERT_PTR(fn), | |
1972 | parse_line, | |
1973 | ASSERT_PTR(c), | |
1974 | ignore_enoent, | |
1975 | /* invalid_config= */ NULL); | |
1976 | } | |
1977 | ||
1978 | static int cat_config(void) { | |
1979 | _cleanup_strv_free_ char **files = NULL; | |
1980 | int r; | |
1981 | ||
1982 | r = conf_files_list_with_replacement(arg_root, CONF_PATHS_STRV("sysusers.d"), arg_replace, &files, NULL); | |
1983 | if (r < 0) | |
1984 | return r; | |
1985 | ||
1986 | pager_open(arg_pager_flags); | |
1987 | ||
1988 | return cat_files(NULL, files, arg_cat_flags); | |
1989 | } | |
1990 | ||
1991 | static int help(void) { | |
1992 | _cleanup_free_ char *link = NULL; | |
1993 | int r; | |
1994 | ||
1995 | r = terminal_urlify_man("systemd-sysusers.service", "8", &link); | |
1996 | if (r < 0) | |
1997 | return log_oom(); | |
1998 | ||
1999 | printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" | |
2000 | "Creates system user accounts.\n\n" | |
2001 | " -h --help Show this help\n" | |
2002 | " --version Show package version\n" | |
2003 | " --cat-config Show configuration files\n" | |
2004 | " --tldr Show non-comment parts of configuration\n" | |
2005 | " --root=PATH Operate on an alternate filesystem root\n" | |
2006 | " --image=PATH Operate on disk image as filesystem root\n" | |
2007 | " --image-policy=POLICY Specify disk image dissection policy\n" | |
2008 | " --replace=PATH Treat arguments as replacement for PATH\n" | |
2009 | " --dry-run Just print what would be done\n" | |
2010 | " --inline Treat arguments as configuration lines\n" | |
2011 | " --no-pager Do not pipe output into a pager\n" | |
2012 | "\nSee the %s for details.\n", | |
2013 | program_invocation_short_name, | |
2014 | link); | |
2015 | ||
2016 | return 0; | |
2017 | } | |
2018 | ||
2019 | static int parse_argv(int argc, char *argv[]) { | |
2020 | ||
2021 | enum { | |
2022 | ARG_VERSION = 0x100, | |
2023 | ARG_CAT_CONFIG, | |
2024 | ARG_TLDR, | |
2025 | ARG_ROOT, | |
2026 | ARG_IMAGE, | |
2027 | ARG_IMAGE_POLICY, | |
2028 | ARG_REPLACE, | |
2029 | ARG_DRY_RUN, | |
2030 | ARG_INLINE, | |
2031 | ARG_NO_PAGER, | |
2032 | }; | |
2033 | ||
2034 | static const struct option options[] = { | |
2035 | { "help", no_argument, NULL, 'h' }, | |
2036 | { "version", no_argument, NULL, ARG_VERSION }, | |
2037 | { "cat-config", no_argument, NULL, ARG_CAT_CONFIG }, | |
2038 | { "tldr", no_argument, NULL, ARG_TLDR }, | |
2039 | { "root", required_argument, NULL, ARG_ROOT }, | |
2040 | { "image", required_argument, NULL, ARG_IMAGE }, | |
2041 | { "image-policy", required_argument, NULL, ARG_IMAGE_POLICY }, | |
2042 | { "replace", required_argument, NULL, ARG_REPLACE }, | |
2043 | { "dry-run", no_argument, NULL, ARG_DRY_RUN }, | |
2044 | { "inline", no_argument, NULL, ARG_INLINE }, | |
2045 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, | |
2046 | {} | |
2047 | }; | |
2048 | ||
2049 | int c, r; | |
2050 | ||
2051 | assert(argc >= 0); | |
2052 | assert(argv); | |
2053 | ||
2054 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
2055 | ||
2056 | switch (c) { | |
2057 | ||
2058 | case 'h': | |
2059 | return help(); | |
2060 | ||
2061 | case ARG_VERSION: | |
2062 | return version(); | |
2063 | ||
2064 | case ARG_CAT_CONFIG: | |
2065 | arg_cat_flags = CAT_CONFIG_ON; | |
2066 | break; | |
2067 | ||
2068 | case ARG_TLDR: | |
2069 | arg_cat_flags = CAT_TLDR; | |
2070 | break; | |
2071 | ||
2072 | case ARG_ROOT: | |
2073 | r = parse_path_argument(optarg, /* suppress_root= */ false, &arg_root); | |
2074 | if (r < 0) | |
2075 | return r; | |
2076 | break; | |
2077 | ||
2078 | case ARG_IMAGE: | |
2079 | #ifdef STANDALONE | |
2080 | return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), | |
2081 | "This systemd-sysusers version is compiled without support for --image=."); | |
2082 | #else | |
2083 | r = parse_path_argument(optarg, /* suppress_root= */ false, &arg_image); | |
2084 | if (r < 0) | |
2085 | return r; | |
2086 | break; | |
2087 | #endif | |
2088 | ||
2089 | case ARG_IMAGE_POLICY: | |
2090 | r = parse_image_policy_argument(optarg, &arg_image_policy); | |
2091 | if (r < 0) | |
2092 | return r; | |
2093 | break; | |
2094 | ||
2095 | case ARG_REPLACE: | |
2096 | if (!path_is_absolute(optarg)) | |
2097 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
2098 | "The argument to --replace= must be an absolute path."); | |
2099 | if (!endswith(optarg, ".conf")) | |
2100 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
2101 | "The argument to --replace= must have the extension '.conf'."); | |
2102 | ||
2103 | arg_replace = optarg; | |
2104 | break; | |
2105 | ||
2106 | case ARG_DRY_RUN: | |
2107 | arg_dry_run = true; | |
2108 | break; | |
2109 | ||
2110 | case ARG_INLINE: | |
2111 | arg_inline = true; | |
2112 | break; | |
2113 | ||
2114 | case ARG_NO_PAGER: | |
2115 | arg_pager_flags |= PAGER_DISABLE; | |
2116 | break; | |
2117 | ||
2118 | case '?': | |
2119 | return -EINVAL; | |
2120 | ||
2121 | default: | |
2122 | assert_not_reached(); | |
2123 | } | |
2124 | ||
2125 | if (arg_replace && arg_cat_flags != CAT_CONFIG_OFF) | |
2126 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
2127 | "Option --replace= is not supported with --cat-config/--tldr."); | |
2128 | ||
2129 | if (arg_replace && optind >= argc) | |
2130 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
2131 | "When --replace= is given, some configuration items must be specified."); | |
2132 | ||
2133 | if (arg_image && arg_root) | |
2134 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
2135 | "Use either --root= or --image=, the combination of both is not supported."); | |
2136 | ||
2137 | return 1; | |
2138 | } | |
2139 | ||
2140 | static int parse_arguments(Context *c, char **args) { | |
2141 | unsigned pos = 1; | |
2142 | int r; | |
2143 | ||
2144 | assert(c); | |
2145 | ||
2146 | STRV_FOREACH(arg, args) { | |
2147 | if (arg_inline) | |
2148 | /* Use (argument):n, where n==1 for the first positional arg */ | |
2149 | r = parse_line("(argument)", pos, *arg, /* invalid_config= */ NULL, c); | |
2150 | else | |
2151 | r = read_config_file(c, *arg, /* ignore_enoent= */ false); | |
2152 | if (r < 0) | |
2153 | return r; | |
2154 | ||
2155 | pos++; | |
2156 | } | |
2157 | ||
2158 | return 0; | |
2159 | } | |
2160 | ||
2161 | static int read_config_files(Context *c, char **args) { | |
2162 | _cleanup_strv_free_ char **files = NULL; | |
2163 | _cleanup_free_ char *p = NULL; | |
2164 | int r; | |
2165 | ||
2166 | assert(c); | |
2167 | ||
2168 | r = conf_files_list_with_replacement(arg_root, CONF_PATHS_STRV("sysusers.d"), arg_replace, &files, &p); | |
2169 | if (r < 0) | |
2170 | return r; | |
2171 | ||
2172 | STRV_FOREACH(f, files) | |
2173 | if (p && path_equal(*f, p)) { | |
2174 | log_debug("Parsing arguments at position \"%s\"%s", *f, special_glyph(SPECIAL_GLYPH_ELLIPSIS)); | |
2175 | ||
2176 | r = parse_arguments(c, args); | |
2177 | if (r < 0) | |
2178 | return r; | |
2179 | } else { | |
2180 | log_debug("Reading config file \"%s\"%s", *f, special_glyph(SPECIAL_GLYPH_ELLIPSIS)); | |
2181 | ||
2182 | /* Just warn, ignore result otherwise */ | |
2183 | (void) read_config_file(c, *f, /* ignore_enoent= */ true); | |
2184 | } | |
2185 | ||
2186 | return 0; | |
2187 | } | |
2188 | ||
2189 | static int read_credential_lines(Context *c) { | |
2190 | _cleanup_free_ char *j = NULL; | |
2191 | const char *d; | |
2192 | int r; | |
2193 | ||
2194 | assert(c); | |
2195 | ||
2196 | r = get_credentials_dir(&d); | |
2197 | if (r == -ENXIO) | |
2198 | return 0; | |
2199 | if (r < 0) | |
2200 | return log_error_errno(r, "Failed to get credentials directory: %m"); | |
2201 | ||
2202 | j = path_join(d, "sysusers.extra"); | |
2203 | if (!j) | |
2204 | return log_oom(); | |
2205 | ||
2206 | (void) read_config_file(c, j, /* ignore_enoent= */ true); | |
2207 | return 0; | |
2208 | } | |
2209 | ||
2210 | static int run(int argc, char *argv[]) { | |
2211 | #ifndef STANDALONE | |
2212 | _cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL; | |
2213 | _cleanup_(umount_and_freep) char *mounted_dir = NULL; | |
2214 | #endif | |
2215 | _cleanup_close_ int lock = -EBADF; | |
2216 | _cleanup_(context_done) Context c = { | |
2217 | .search_uid = UID_INVALID, | |
2218 | }; | |
2219 | ||
2220 | Item *i; | |
2221 | int r; | |
2222 | ||
2223 | r = parse_argv(argc, argv); | |
2224 | if (r <= 0) | |
2225 | return r; | |
2226 | ||
2227 | log_setup(); | |
2228 | ||
2229 | if (arg_cat_flags != CAT_CONFIG_OFF) | |
2230 | return cat_config(); | |
2231 | ||
2232 | umask(0022); | |
2233 | ||
2234 | r = mac_init(); | |
2235 | if (r < 0) | |
2236 | return r; | |
2237 | ||
2238 | #ifndef STANDALONE | |
2239 | if (arg_image) { | |
2240 | assert(!arg_root); | |
2241 | ||
2242 | r = mount_image_privately_interactively( | |
2243 | arg_image, | |
2244 | arg_image_policy, | |
2245 | DISSECT_IMAGE_GENERIC_ROOT | | |
2246 | DISSECT_IMAGE_REQUIRE_ROOT | | |
2247 | DISSECT_IMAGE_VALIDATE_OS | | |
2248 | DISSECT_IMAGE_RELAX_VAR_CHECK | | |
2249 | DISSECT_IMAGE_FSCK | | |
2250 | DISSECT_IMAGE_GROWFS, | |
2251 | &mounted_dir, | |
2252 | /* ret_dir_fd= */ NULL, | |
2253 | &loop_device); | |
2254 | if (r < 0) | |
2255 | return r; | |
2256 | ||
2257 | arg_root = strdup(mounted_dir); | |
2258 | if (!arg_root) | |
2259 | return log_oom(); | |
2260 | } | |
2261 | #else | |
2262 | assert(!arg_image); | |
2263 | #endif | |
2264 | ||
2265 | /* If command line arguments are specified along with --replace, read all configuration files and | |
2266 | * insert the positional arguments at the specified place. Otherwise, if command line arguments are | |
2267 | * specified, execute just them, and finally, without --replace= or any positional arguments, just | |
2268 | * read configuration and execute it. */ | |
2269 | if (arg_replace || optind >= argc) | |
2270 | r = read_config_files(&c, argv + optind); | |
2271 | else | |
2272 | r = parse_arguments(&c, argv + optind); | |
2273 | if (r < 0) | |
2274 | return r; | |
2275 | ||
2276 | r = read_credential_lines(&c); | |
2277 | if (r < 0) | |
2278 | return r; | |
2279 | ||
2280 | /* Let's tell nss-systemd not to synthesize the "root" and "nobody" entries for it, so that our | |
2281 | * detection whether the names or UID/GID area already used otherwise doesn't get confused. After | |
2282 | * all, even though nss-systemd synthesizes these users/groups, they should still appear in | |
2283 | * /etc/passwd and /etc/group, as the synthesizing logic is merely supposed to be fallback for cases | |
2284 | * where we run with a completely unpopulated /etc. */ | |
2285 | if (setenv("SYSTEMD_NSS_BYPASS_SYNTHETIC", "1", 1) < 0) | |
2286 | return log_error_errno(errno, "Failed to set SYSTEMD_NSS_BYPASS_SYNTHETIC environment variable: %m"); | |
2287 | ||
2288 | if (!c.uid_range) { | |
2289 | /* Default to default range of SYSTEMD_UID_MIN..SYSTEM_UID_MAX. */ | |
2290 | r = read_login_defs(&c.login_defs, NULL, arg_root); | |
2291 | if (r < 0) | |
2292 | return log_error_errno(r, "Failed to read %s%s: %m", | |
2293 | strempty(arg_root), "/etc/login.defs"); | |
2294 | ||
2295 | c.login_defs_need_warning = true; | |
2296 | ||
2297 | /* We pick a range that very conservative: we look at compiled-in maximum and the value in | |
2298 | * /etc/login.defs. That way the UIDs/GIDs which we allocate will be interpreted correctly, | |
2299 | * even if /etc/login.defs is removed later. (The bottom bound doesn't matter much, since | |
2300 | * it's only used during allocation, so we use the configured value directly). */ | |
2301 | uid_t begin = c.login_defs.system_alloc_uid_min, | |
2302 | end = MIN3((uid_t) SYSTEM_UID_MAX, c.login_defs.system_uid_max, c.login_defs.system_gid_max); | |
2303 | if (begin < end) { | |
2304 | r = uid_range_add(&c.uid_range, begin, end - begin + 1); | |
2305 | if (r < 0) | |
2306 | return log_oom(); | |
2307 | } | |
2308 | } | |
2309 | ||
2310 | r = add_implicit(&c); | |
2311 | if (r < 0) | |
2312 | return r; | |
2313 | ||
2314 | if (!arg_dry_run) { | |
2315 | lock = take_etc_passwd_lock(arg_root); | |
2316 | if (lock < 0) | |
2317 | return log_error_errno(lock, "Failed to take /etc/passwd lock: %m"); | |
2318 | } | |
2319 | ||
2320 | r = load_user_database(&c); | |
2321 | if (r < 0) | |
2322 | return log_error_errno(r, "Failed to load user database: %m"); | |
2323 | ||
2324 | r = load_group_database(&c); | |
2325 | if (r < 0) | |
2326 | return log_error_errno(r, "Failed to read group database: %m"); | |
2327 | ||
2328 | ORDERED_HASHMAP_FOREACH(i, c.groups) | |
2329 | (void) process_item(&c, i); | |
2330 | ||
2331 | ORDERED_HASHMAP_FOREACH(i, c.users) | |
2332 | (void) process_item(&c, i); | |
2333 | ||
2334 | return write_files(&c); | |
2335 | } | |
2336 | ||
2337 | DEFINE_MAIN_FUNCTION(run); |