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sysusers: add support for a --image= switch
[thirdparty/systemd.git] / src / sysusers / sysusers.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
1b992147 2
3f6fd1ba 3#include <getopt.h>
932ad62b 4#include <utmp.h>
1b992147 5
b5efdb8a 6#include "alloc-util.h"
1b992147
LP		 7#include "conf-files.h"
8#include "copy.h"
a0f29c76 9#include "def.h"
0c3ee127 10#include "dissect-image.h"
a0f29c76 11#include "fd-util.h"
ee228be1 12#include "fileio.h"
f97b34a6 13#include "format-util.h"
dcd5c891 14#include "fs-util.h"
3f6fd1ba 15#include "hashmap.h"
71da1673 16#include "main-func.h"
0c3ee127 17#include "mount-util.h"
dcd5c891 18#include "pager.h"
3f6fd1ba 19#include "path-util.h"
294bf0c3 20#include "pretty-print.h"
3f6fd1ba 21#include "selinux-util.h"
0c3ee127 22#include "set.h"
07630cea 23#include "smack-util.h"
3f6fd1ba 24#include "specifier.h"
07630cea 25#include "string-util.h"
3f6fd1ba 26#include "strv.h"
e4de7287 27#include "tmpfile-util-label.h"
3f6fd1ba 28#include "uid-range.h"
a0f29c76 29#include "user-util.h"
3f6fd1ba
LP		 30#include "utf8.h"
31#include "util.h"
1b992147
LP		 32
33typedef enum ItemType {
34 ADD_USER = 'u',
35 ADD_GROUP = 'g',
a12b0cc3 36 ADD_MEMBER = 'm',
8530dc44 37 ADD_RANGE = 'r',
1b992147 38} ItemType;
dcd5c891 39
1b992147
LP		 40typedef struct Item {
41 ItemType type;
42
43 char *name;
649916d3 44 char *group_name;
1b992147
LP		 45 char *uid_path;
46 char *gid_path;
47 char *description;
7629889c 48 char *home;
7b1aaf66 49 char *shell;
1b992147
LP		 50
51 gid_t gid;
52 uid_t uid;
53
54 bool gid_set:1;
fb959f14
ZJS		 55
56 /* When set the group with the specified gid must exist
57 * and the check if a uid clashes with the gid is skipped.
58 */
b9ee05c2 59 bool id_set_strict:1;
fb959f14 60
1b992147
LP		 61 bool uid_set:1;
62
c1b6b04f
KS		 63 bool todo_user:1;
64 bool todo_group:1;
1b992147
LP		 65} Item;
66
67static char *arg_root = NULL;
0c3ee127 68static char *arg_image = NULL;
ec0327d6 69static bool arg_cat_config = false;
d16a1c1b 70static const char *arg_replace = NULL;
1b600bd5 71static bool arg_inline = false;
0221d68a 72static PagerFlags arg_pager_flags = 0;
1b992147 73
5bc9c980
MV		 74static OrderedHashmap *users = NULL, *groups = NULL;
75static OrderedHashmap *todo_uids = NULL, *todo_gids = NULL;
76static OrderedHashmap *members = NULL;
1b992147 77
71da1673
YW		 78static Hashmap *database_by_uid = NULL, *database_by_username = NULL;
79static Hashmap *database_by_gid = NULL, *database_by_groupname = NULL;
80static Set *database_users = NULL, *database_groups = NULL;
1b992147 81
fed1e721 82static uid_t search_uid = UID_INVALID;
8530dc44
LP		 83static UidRange *uid_range = NULL;
84static unsigned n_uid_range = 0;
1b992147 85
71da1673
YW		 86STATIC_DESTRUCTOR_REGISTER(groups, ordered_hashmap_freep);
87STATIC_DESTRUCTOR_REGISTER(users, ordered_hashmap_freep);
88STATIC_DESTRUCTOR_REGISTER(members, ordered_hashmap_freep);
89STATIC_DESTRUCTOR_REGISTER(todo_uids, ordered_hashmap_freep);
90STATIC_DESTRUCTOR_REGISTER(todo_gids, ordered_hashmap_freep);
91STATIC_DESTRUCTOR_REGISTER(database_by_uid, hashmap_freep);
92STATIC_DESTRUCTOR_REGISTER(database_by_username, hashmap_freep);
93STATIC_DESTRUCTOR_REGISTER(database_users, set_free_freep);
94STATIC_DESTRUCTOR_REGISTER(database_by_gid, hashmap_freep);
95STATIC_DESTRUCTOR_REGISTER(database_by_groupname, hashmap_freep);
96STATIC_DESTRUCTOR_REGISTER(database_groups, set_free_freep);
97STATIC_DESTRUCTOR_REGISTER(uid_range, freep);
98STATIC_DESTRUCTOR_REGISTER(arg_root, freep);
0c3ee127 99STATIC_DESTRUCTOR_REGISTER(arg_image, freep);
71da1673 100
08c7c321
ZJS		 101static int errno_is_not_exists(int code) {
102 /* See getpwnam(3) and getgrnam(3): those codes and others can be returned if the user or group are
103 * not found. */
104 return IN_SET(code, 0, ENOENT, ESRCH, EBADF, EPERM);
105}
106
1b992147
LP		 107static int load_user_database(void) {
108 _cleanup_fclose_ FILE *f = NULL;
109 const char *passwd_path;
110 struct passwd *pw;
111 int r;
112
1d13f648 113 passwd_path = prefix_roota(arg_root, "/etc/passwd");
1b992147
LP		 114 f = fopen(passwd_path, "re");
115 if (!f)
116 return errno == ENOENT ? 0 : -errno;
117
71da1673 118 r = hashmap_ensure_allocated(&database_by_username, &string_hash_ops);
1b992147
LP		 119 if (r < 0)
120 return r;
121
71da1673 122 r = hashmap_ensure_allocated(&database_by_uid, NULL);
1b992147
LP		 123 if (r < 0)
124 return r;
125
71da1673 126 r = set_ensure_allocated(&database_users, NULL);
1b992147
LP		 127 if (r < 0)
128 return r;
129
100d5f6e 130 while ((r = fgetpwent_sane(f, &pw)) > 0) {
43e948ee 131 char *n;
340ac019 132 int k, q;
1b992147
LP		 133
134 n = strdup(pw->pw_name);
135 if (!n)
136 return -ENOMEM;
137
71da1673
YW		 138 k = set_put(database_users, n);
139 if (k < 0) {
1b992147
LP		 140 free(n);
141 return k;
142 }
143
71da1673
YW		 144 k = hashmap_put(database_by_username, n, UID_TO_PTR(pw->pw_uid));
145 if (k < 0 && k != -EEXIST)
146 return k;
1b992147 147
71da1673
YW		 148 q = hashmap_put(database_by_uid, UID_TO_PTR(pw->pw_uid), n);
149 if (q < 0 && q != -EEXIST)
150 return q;
1b992147 151 }
100d5f6e 152 return r;
1b992147
LP		 153}
154
155static int load_group_database(void) {
156 _cleanup_fclose_ FILE *f = NULL;
157 const char *group_path;
158 struct group *gr;
159 int r;
160
1d13f648 161 group_path = prefix_roota(arg_root, "/etc/group");
1b992147
LP		 162 f = fopen(group_path, "re");
163 if (!f)
164 return errno == ENOENT ? 0 : -errno;
165
71da1673 166 r = hashmap_ensure_allocated(&database_by_groupname, &string_hash_ops);
1b992147
LP		 167 if (r < 0)
168 return r;
169
71da1673 170 r = hashmap_ensure_allocated(&database_by_gid, NULL);
1b992147
LP		 171 if (r < 0)
172 return r;
173
71da1673 174 r = set_ensure_allocated(&database_groups, NULL);
1b992147
LP		 175 if (r < 0)
176 return r;
177
f030d36c 178 while ((r = fgetgrent_sane(f, &gr)) > 0) {
1b992147
LP		 179 char *n;
180 int k, q;
181
182 n = strdup(gr->gr_name);
183 if (!n)
184 return -ENOMEM;
185
71da1673
YW		 186 k = set_put(database_groups, n);
187 if (k < 0) {
1b992147
LP		 188 free(n);
189 return k;
190 }
191
71da1673
YW		 192 k = hashmap_put(database_by_groupname, n, GID_TO_PTR(gr->gr_gid));
193 if (k < 0 && k != -EEXIST)
194 return k;
1b992147 195
71da1673
YW		 196 q = hashmap_put(database_by_gid, GID_TO_PTR(gr->gr_gid), n);
197 if (q < 0 && q != -EEXIST)
198 return q;
1b992147 199 }
f030d36c 200 return r;
1b992147
LP		 201}
202
9f1c1940
ZJS		 203static int make_backup(const char *target, const char *x) {
204 _cleanup_close_ int src = -1;
205 _cleanup_fclose_ FILE *dst = NULL;
1fb5a5ed 206 _cleanup_free_ char *dst_tmp = NULL;
0a12bb1e 207 char *backup;
1b992147
LP		 208 struct timespec ts[2];
209 struct stat st;
210 int r;
211
212 src = open(x, O_RDONLY|O_CLOEXEC|O_NOCTTY);
213 if (src < 0) {
214 if (errno == ENOENT) /* No backup necessary... */
215 return 0;
216
217 return -errno;
218 }
219
220 if (fstat(src, &st) < 0)
221 return -errno;
222
1fb5a5ed 223 r = fopen_temporary_label(target, x, &dst, &dst_tmp);
9f1c1940
ZJS		 224 if (r < 0)
225 return r;
1b992147 226
1c876927 227 r = copy_bytes(src, fileno(dst), (uint64_t) -1, COPY_REFLINK);
1b992147
LP		 228 if (r < 0)
229 goto fail;
230
9f1c1940
ZJS		 231 /* Don't fail on chmod() or chown(). If it stays owned by us
232 * and/or unreadable by others, then it isn't too bad... */
233
63c372cb 234 backup = strjoina(x, "-");
9f1c1940 235
1b992147 236 /* Copy over the access mask */
1fb5a5ed 237 r = chmod_and_chown_unsafe(dst_tmp, st.st_mode & 07777, st.st_uid, st.st_gid);
c039af23
YW		 238 if (r < 0)
239 log_warning_errno(r, "Failed to change access mode or ownership of %s: %m", backup);
1b992147
LP		 240
241 ts[0] = st.st_atim;
242 ts[1] = st.st_mtim;
f06863bd 243 if (futimens(fileno(dst), ts) < 0)
56f64d95 244 log_warning_errno(errno, "Failed to fix access and modification time of %s: %m", backup);
1b992147 245
0675e94a
AJ		 246 r = fflush_sync_and_check(dst);
247 if (r < 0)
248 goto fail;
249
1fb5a5ed 250 if (rename(dst_tmp, backup) < 0) {
0675e94a 251 r = -errno;
1b992147 252 goto fail;
0675e94a 253 }
1b992147
LP		 254
255 return 0;
256
257fail:
1fb5a5ed 258 (void) unlink(dst_tmp);
1b992147
LP		 259 return r;
260}
261
a12b0cc3
LP		 262static int putgrent_with_members(const struct group *gr, FILE *group) {
263 char **a;
264
265 assert(gr);
266 assert(group);
267
5bc9c980 268 a = ordered_hashmap_get(members, gr->gr_name);
a12b0cc3
LP		 269 if (a) {
270 _cleanup_strv_free_ char **l = NULL;
271 bool added = false;
272 char **i;
273
274 l = strv_copy(gr->gr_mem);
275 if (!l)
276 return -ENOMEM;
277
278 STRV_FOREACH(i, a) {
279 if (strv_find(l, *i))
280 continue;
281
282 if (strv_extend(&l, *i) < 0)
283 return -ENOMEM;
284
285 added = true;
286 }
287
288 if (added) {
289 struct group t;
100d5f6e 290 int r;
a12b0cc3
LP		 291
292 strv_uniq(l);
293 strv_sort(l);
294
295 t = *gr;
296 t.gr_mem = l;
297
100d5f6e
FB		 298 r = putgrent_sane(&t, group);
299 return r < 0 ? r : 1;
a12b0cc3
LP		 300 }
301 }
302
100d5f6e 303 return putgrent_sane(gr, group);
a12b0cc3
LP		 304}
305
349cc4a5 306#if ENABLE_GSHADOW
9ab315cc
LP		 307static int putsgent_with_members(const struct sgrp *sg, FILE *gshadow) {
308 char **a;
309
310 assert(sg);
311 assert(gshadow);
312
5bc9c980 313 a = ordered_hashmap_get(members, sg->sg_namp);
9ab315cc
LP		 314 if (a) {
315 _cleanup_strv_free_ char **l = NULL;
316 bool added = false;
317 char **i;
318
319 l = strv_copy(sg->sg_mem);
320 if (!l)
321 return -ENOMEM;
322
323 STRV_FOREACH(i, a) {
324 if (strv_find(l, *i))
325 continue;
326
327 if (strv_extend(&l, *i) < 0)
328 return -ENOMEM;
329
330 added = true;
331 }
332
333 if (added) {
334 struct sgrp t;
100d5f6e 335 int r;
9ab315cc
LP		 336
337 strv_uniq(l);
338 strv_sort(l);
339
340 t = *sg;
341 t.sg_mem = l;
342
100d5f6e
FB		 343 r = putsgent_sane(&t, gshadow);
344 return r < 0 ? r : 1;
9ab315cc
LP		 345 }
346 }
347
100d5f6e 348 return putsgent_sane(sg, gshadow);
9ab315cc 349}
b14e1b43 350#endif
9ab315cc 351
7b1aaf66 352static const char* default_shell(uid_t uid) {
6db90462 353 return uid == 0 ? "/bin/sh" : NOLOGIN;
7b1aaf66
ZJS		 354}
355
b20b0b66
FB		 356static int write_temporary_passwd(const char *passwd_path, FILE **tmpfile, char **tmpfile_path) {
357 _cleanup_fclose_ FILE *original = NULL, *passwd = NULL;
1dd98a71 358 _cleanup_(unlink_and_freep) char *passwd_tmp = NULL;
563dc6f8 359 struct passwd *pw = NULL;
1b992147
LP		 360 Iterator iterator;
361 Item *i;
362 int r;
363
5bc9c980 364 if (ordered_hashmap_size(todo_uids) == 0)
b20b0b66 365 return 0;
1b992147 366
b20b0b66
FB		 367 r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp);
368 if (r < 0)
369 return r;
370
371 original = fopen(passwd_path, "re");
372 if (original) {
b20b0b66 373
90c81688 374 r = sync_rights(fileno(original), fileno(passwd));
1b992147 375 if (r < 0)
1dd98a71 376 return r;
1b992147 377
100d5f6e 378 while ((r = fgetpwent_sane(original, &pw)) > 0) {
1b992147 379
5bc9c980 380 i = ordered_hashmap_get(users, pw->pw_name);
330d1def
ZJS		 381 if (i && i->todo_user)
382 return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
383 "%s: User \"%s\" already exists.",
384 passwd_path, pw->pw_name);
e3c72c21 385
330d1def
ZJS		 386 if (ordered_hashmap_contains(todo_uids, UID_TO_PTR(pw->pw_uid)))
387 return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
388 "%s: Detected collision for UID " UID_FMT ".",
389 passwd_path, pw->pw_uid);
b20b0b66 390
563dc6f8
FB		 391 /* Make sure we keep the NIS entries (if any) at the end. */
392 if (IN_SET(pw->pw_name[0], '+', '-'))
393 break;
394
100d5f6e
FB		 395 r = putpwent_sane(pw, passwd);
396 if (r < 0)
397 return r;
b20b0b66 398 }
100d5f6e
FB		 399 if (r < 0)
400 return r;
1dd98a71
FB		 401
402 } else {
403 if (errno != ENOENT)
404 return -errno;
405 if (fchmod(fileno(passwd), 0644) < 0)
406 return -errno;
b20b0b66
FB		 407 }
408
5bc9c980 409 ORDERED_HASHMAP_FOREACH(i, todo_uids, iterator) {
b20b0b66
FB		 410 struct passwd n = {
411 .pw_name = i->name,
412 .pw_uid = i->uid,
413 .pw_gid = i->gid,
414 .pw_gecos = i->description,
1b992147 415
b20b0b66
FB		 416 /* "x" means the password is stored in the shadow file */
417 .pw_passwd = (char*) "x",
a12b0cc3 418
b20b0b66 419 /* We default to the root directory as home */
636e72bc 420 .pw_dir = i->home ?: (char*) "/",
1b992147 421
b20b0b66
FB		 422 /* Initialize the shell to nologin, with one exception:
423 * for root we patch in something special */
7b1aaf66 424 .pw_shell = i->shell ?: (char*) default_shell(i->uid),
b20b0b66 425 };
9ab315cc 426
100d5f6e
FB		 427 r = putpwent_sane(&n, passwd);
428 if (r < 0)
429 return r;
b20b0b66
FB		 430 }
431
563dc6f8
FB		 432 /* Append the remaining NIS entries if any */
433 while (pw) {
100d5f6e
FB		 434 r = putpwent_sane(pw, passwd);
435 if (r < 0)
436 return r;
563dc6f8 437
100d5f6e
FB		 438 r = fgetpwent_sane(original, &pw);
439 if (r < 0)
440 return r;
441 if (r == 0)
442 break;
563dc6f8 443 }
563dc6f8 444
b20b0b66
FB		 445 r = fflush_and_check(passwd);
446 if (r < 0)
1dd98a71 447 return r;
b20b0b66 448
1cc6c93a
YW		 449 *tmpfile = TAKE_PTR(passwd);
450 *tmpfile_path = TAKE_PTR(passwd_tmp);
451
b20b0b66 452 return 0;
b20b0b66
FB		 453}
454
455static int write_temporary_shadow(const char *shadow_path, FILE **tmpfile, char **tmpfile_path) {
456 _cleanup_fclose_ FILE *original = NULL, *shadow = NULL;
1dd98a71 457 _cleanup_(unlink_and_freep) char *shadow_tmp = NULL;
19ec7de2 458 struct spwd *sp = NULL;
b20b0b66
FB		 459 Iterator iterator;
460 long lstchg;
461 Item *i;
462 int r;
463
5bc9c980 464 if (ordered_hashmap_size(todo_uids) == 0)
b20b0b66
FB		 465 return 0;
466
467 r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp);
468 if (r < 0)
469 return r;
9ab315cc 470
b20b0b66
FB		 471 lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY);
472
473 original = fopen(shadow_path, "re");
474 if (original) {
b20b0b66 475
90c81688 476 r = sync_rights(fileno(original), fileno(shadow));
9ab315cc 477 if (r < 0)
1dd98a71 478 return r;
9ab315cc 479
100d5f6e 480 while ((r = fgetspent_sane(original, &sp)) > 0) {
9ab315cc 481
5bc9c980 482 i = ordered_hashmap_get(users, sp->sp_namp);
b20b0b66
FB		 483 if (i && i->todo_user) {
484 /* we will update the existing entry */
485 sp->sp_lstchg = lstchg;
e3c72c21 486
b20b0b66
FB		 487 /* only the /etc/shadow stage is left, so we can
488 * safely remove the item from the todo set */
489 i->todo_user = false;
5bc9c980 490 ordered_hashmap_remove(todo_uids, UID_TO_PTR(i->uid));
9ab315cc 491 }
b20b0b66 492
19ec7de2
FB		 493 /* Make sure we keep the NIS entries (if any) at the end. */
494 if (IN_SET(sp->sp_namp[0], '+', '-'))
495 break;
496
100d5f6e
FB		 497 r = putspent_sane(sp, shadow);
498 if (r < 0)
499 return r;
b20b0b66 500 }
100d5f6e
FB		 501 if (r < 0)
502 return r;
1dd98a71
FB		 503
504 } else {
505 if (errno != ENOENT)
506 return -errno;
507 if (fchmod(fileno(shadow), 0000) < 0)
508 return -errno;
b20b0b66 509 }
9ab315cc 510
5bc9c980 511 ORDERED_HASHMAP_FOREACH(i, todo_uids, iterator) {
b20b0b66
FB		 512 struct spwd n = {
513 .sp_namp = i->name,
fc58c0c7 514 .sp_pwdp = (char*) "!*", /* lock this password, and make it invalid */
b20b0b66
FB		 515 .sp_lstchg = lstchg,
516 .sp_min = -1,
517 .sp_max = -1,
518 .sp_warn = -1,
519 .sp_inact = -1,
12c82937 520 .sp_expire = -1,
b20b0b66
FB		 521 .sp_flag = (unsigned long) -1, /* this appears to be what everybody does ... */
522 };
9ab315cc 523
100d5f6e
FB		 524 r = putspent_sane(&n, shadow);
525 if (r < 0)
526 return r;
1b992147 527 }
19ec7de2
FB		 528
529 /* Append the remaining NIS entries if any */
530 while (sp) {
100d5f6e
FB		 531 r = putspent_sane(sp, shadow);
532 if (r < 0)
533 return r;
19ec7de2 534
100d5f6e
FB		 535 r = fgetspent_sane(original, &sp);
536 if (r < 0)
537 return r;
538 if (r == 0)
539 break;
19ec7de2
FB		 540 }
541 if (!IN_SET(errno, 0, ENOENT))
542 return -errno;
1b992147 543
0675e94a 544 r = fflush_sync_and_check(shadow);
b20b0b66 545 if (r < 0)
1dd98a71 546 return r;
b20b0b66 547
1cc6c93a
YW		 548 *tmpfile = TAKE_PTR(shadow);
549 *tmpfile_path = TAKE_PTR(shadow_tmp);
550
b20b0b66 551 return 0;
b20b0b66 552}
1b992147 553
b20b0b66
FB		 554static int write_temporary_group(const char *group_path, FILE **tmpfile, char **tmpfile_path) {
555 _cleanup_fclose_ FILE *original = NULL, *group = NULL;
1dd98a71 556 _cleanup_(unlink_and_freep) char *group_tmp = NULL;
b20b0b66 557 bool group_changed = false;
563dc6f8 558 struct group *gr = NULL;
b20b0b66
FB		 559 Iterator iterator;
560 Item *i;
561 int r;
1b992147 562
5bc9c980 563 if (ordered_hashmap_size(todo_gids) == 0 && ordered_hashmap_size(members) == 0)
b20b0b66 564 return 0;
e3c72c21 565
b20b0b66
FB		 566 r = fopen_temporary_label("/etc/group", group_path, &group, &group_tmp);
567 if (r < 0)
568 return r;
569
570 original = fopen(group_path, "re");
571 if (original) {
b20b0b66 572
90c81688 573 r = sync_rights(fileno(original), fileno(group));
b20b0b66 574 if (r < 0)
1dd98a71 575 return r;
b20b0b66 576
100d5f6e 577 while ((r = fgetgrent_sane(original, &gr)) > 0) {
b20b0b66
FB		 578 /* Safety checks against name and GID collisions. Normally,
579 * this should be unnecessary, but given that we look at the
580 * entries anyway here, let's make an extra verification
581 * step that we don't generate duplicate entries. */
582
5bc9c980 583 i = ordered_hashmap_get(groups, gr->gr_name);
330d1def
ZJS		 584 if (i && i->todo_group)
585 return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
586 "%s: Group \"%s\" already exists.",
587 group_path, gr->gr_name);
b20b0b66 588
330d1def
ZJS		 589 if (ordered_hashmap_contains(todo_gids, GID_TO_PTR(gr->gr_gid)))
590 return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
591 "%s: Detected collision for GID " GID_FMT ".",
592 group_path, gr->gr_gid);
1b992147 593
563dc6f8
FB		 594 /* Make sure we keep the NIS entries (if any) at the end. */
595 if (IN_SET(gr->gr_name[0], '+', '-'))
596 break;
597
b20b0b66
FB		 598 r = putgrent_with_members(gr, group);
599 if (r < 0)
1dd98a71 600 return r;
b20b0b66
FB		 601 if (r > 0)
602 group_changed = true;
b20b0b66 603 }
100d5f6e
FB		 604 if (r < 0)
605 return r;
1dd98a71
FB		 606
607 } else {
608 if (errno != ENOENT)
609 return -errno;
610 if (fchmod(fileno(group), 0644) < 0)
611 return -errno;
b20b0b66 612 }
7629889c 613
5bc9c980 614 ORDERED_HASHMAP_FOREACH(i, todo_gids, iterator) {
b20b0b66
FB		 615 struct group n = {
616 .gr_name = i->name,
617 .gr_gid = i->gid,
618 .gr_passwd = (char*) "x",
619 };
1b992147 620
b20b0b66
FB		 621 r = putgrent_with_members(&n, group);
622 if (r < 0)
1dd98a71 623 return r;
7629889c 624
b20b0b66
FB		 625 group_changed = true;
626 }
1b992147 627
563dc6f8
FB		 628 /* Append the remaining NIS entries if any */
629 while (gr) {
100d5f6e
FB		 630 r = putgrent_sane(gr, group);
631 if (r < 0)
632 return r;
563dc6f8 633
100d5f6e
FB		 634 r = fgetgrent_sane(original, &gr);
635 if (r < 0)
636 return r;
637 if (r == 0)
638 break;
563dc6f8 639 }
563dc6f8 640
0675e94a 641 r = fflush_sync_and_check(group);
b20b0b66 642 if (r < 0)
1dd98a71 643 return r;
1b992147 644
b20b0b66 645 if (group_changed) {
1cc6c93a
YW		 646 *tmpfile = TAKE_PTR(group);
647 *tmpfile_path = TAKE_PTR(group_tmp);
b20b0b66
FB		 648 }
649 return 0;
b20b0b66
FB		 650}
651
652static int write_temporary_gshadow(const char * gshadow_path, FILE **tmpfile, char **tmpfile_path) {
349cc4a5 653#if ENABLE_GSHADOW
b20b0b66 654 _cleanup_fclose_ FILE *original = NULL, *gshadow = NULL;
1dd98a71 655 _cleanup_(unlink_and_freep) char *gshadow_tmp = NULL;
b20b0b66
FB		 656 bool group_changed = false;
657 Iterator iterator;
658 Item *i;
659 int r;
660
5bc9c980 661 if (ordered_hashmap_size(todo_gids) == 0 && ordered_hashmap_size(members) == 0)
b20b0b66
FB		 662 return 0;
663
664 r = fopen_temporary_label("/etc/gshadow", gshadow_path, &gshadow, &gshadow_tmp);
665 if (r < 0)
666 return r;
9ab315cc 667
b20b0b66
FB		 668 original = fopen(gshadow_path, "re");
669 if (original) {
670 struct sgrp *sg;
671
90c81688 672 r = sync_rights(fileno(original), fileno(gshadow));
1b992147 673 if (r < 0)
1dd98a71 674 return r;
9ab315cc 675
100d5f6e 676 while ((r = fgetsgent_sane(original, &sg)) > 0) {
c5abf225 677
5bc9c980 678 i = ordered_hashmap_get(groups, sg->sg_namp);
330d1def
ZJS		 679 if (i && i->todo_group)
680 return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
681 "%s: Group \"%s\" already exists.",
682 gshadow_path, sg->sg_namp);
9ab315cc 683
b20b0b66 684 r = putsgent_with_members(sg, gshadow);
fff19499 685 if (r < 0)
1dd98a71 686 return r;
b20b0b66
FB		 687 if (r > 0)
688 group_changed = true;
b20b0b66 689 }
100d5f6e
FB		 690 if (r < 0)
691 return r;
1dd98a71
FB		 692
693 } else {
694 if (errno != ENOENT)
695 return -errno;
696 if (fchmod(fileno(gshadow), 0000) < 0)
697 return -errno;
b20b0b66 698 }
9ab315cc 699
5bc9c980 700 ORDERED_HASHMAP_FOREACH(i, todo_gids, iterator) {
b20b0b66
FB		 701 struct sgrp n = {
702 .sg_namp = i->name,
703 .sg_passwd = (char*) "!!",
704 };
9ab315cc 705
b20b0b66 706 r = putsgent_with_members(&n, gshadow);
9ab315cc 707 if (r < 0)
1dd98a71 708 return r;
b20b0b66
FB		 709
710 group_changed = true;
9ab315cc
LP		 711 }
712
0675e94a 713 r = fflush_sync_and_check(gshadow);
b20b0b66 714 if (r < 0)
1dd98a71 715 return r;
b20b0b66 716
9ab315cc 717 if (group_changed) {
1cc6c93a
YW		 718 *tmpfile = TAKE_PTR(gshadow);
719 *tmpfile_path = TAKE_PTR(gshadow_tmp);
b20b0b66
FB		 720 }
721 return 0;
b14e1b43
FB		 722#else
723 return 0;
724#endif
b20b0b66
FB		 725}
726
727static int write_files(void) {
b20b0b66 728 _cleanup_fclose_ FILE *passwd = NULL, *group = NULL, *shadow = NULL, *gshadow = NULL;
1dd98a71 729 _cleanup_(unlink_and_freep) char *passwd_tmp = NULL, *group_tmp = NULL, *shadow_tmp = NULL, *gshadow_tmp = NULL;
b20b0b66
FB		 730 const char *passwd_path = NULL, *group_path = NULL, *shadow_path = NULL, *gshadow_path = NULL;
731 int r;
732
733 passwd_path = prefix_roota(arg_root, "/etc/passwd");
734 shadow_path = prefix_roota(arg_root, "/etc/shadow");
735 group_path = prefix_roota(arg_root, "/etc/group");
736 gshadow_path = prefix_roota(arg_root, "/etc/gshadow");
737
738 r = write_temporary_group(group_path, &group, &group_tmp);
739 if (r < 0)
1dd98a71 740 return r;
b20b0b66
FB		 741
742 r = write_temporary_gshadow(gshadow_path, &gshadow, &gshadow_tmp);
743 if (r < 0)
1dd98a71 744 return r;
b20b0b66
FB		 745
746 r = write_temporary_passwd(passwd_path, &passwd, &passwd_tmp);
747 if (r < 0)
1dd98a71 748 return r;
b20b0b66
FB		 749
750 r = write_temporary_shadow(shadow_path, &shadow, &shadow_tmp);
751 if (r < 0)
1dd98a71 752 return r;
b20b0b66
FB		 753
754 /* Make a backup of the old files */
755 if (group) {
756 r = make_backup("/etc/group", group_path);
757 if (r < 0)
1dd98a71 758 return r;
b20b0b66
FB		 759 }
760 if (gshadow) {
761 r = make_backup("/etc/gshadow", gshadow_path);
762 if (r < 0)
1dd98a71 763 return r;
1b992147
LP		 764 }
765
766 if (passwd) {
9f1c1940 767 r = make_backup("/etc/passwd", passwd_path);
1b992147 768 if (r < 0)
1dd98a71 769 return r;
1b992147 770 }
9ab315cc
LP		 771 if (shadow) {
772 r = make_backup("/etc/shadow", shadow_path);
773 if (r < 0)
1dd98a71 774 return r;
9ab315cc 775 }
1b992147
LP		 776
777 /* And make the new files count */
b20b0b66 778 if (group) {
2da3dc69 779 r = rename_and_apply_smack_floor_label(group_tmp, group_path);
b20b0b66 780 if (r < 0)
1dd98a71 781 return r;
9ab315cc 782
b20b0b66
FB		 783 group_tmp = mfree(group_tmp);
784 }
785 if (gshadow) {
2da3dc69 786 r = rename_and_apply_smack_floor_label(gshadow_tmp, gshadow_path);
b20b0b66 787 if (r < 0)
1dd98a71 788 return r;
1b992147 789
b20b0b66 790 gshadow_tmp = mfree(gshadow_tmp);
1b992147
LP		 791 }
792
793 if (passwd) {
2da3dc69 794 r = rename_and_apply_smack_floor_label(passwd_tmp, passwd_path);
c02e7b1e 795 if (r < 0)
1dd98a71 796 return r;
1b992147 797
97b11eed 798 passwd_tmp = mfree(passwd_tmp);
1b992147 799 }
9ab315cc 800 if (shadow) {
2da3dc69 801 r = rename_and_apply_smack_floor_label(shadow_tmp, shadow_path);
c02e7b1e 802 if (r < 0)
1dd98a71 803 return r;
9ab315cc 804
97b11eed 805 shadow_tmp = mfree(shadow_tmp);
9ab315cc 806 }
1b992147 807
1dd98a71 808 return 0;
1b992147
LP		 809}
810
b9ee05c2 811static int uid_is_ok(uid_t uid, const char *name, bool check_with_gid) {
1b992147
LP		 812 struct passwd *p;
813 struct group *g;
814 const char *n;
815 Item *i;
816
817 /* Let's see if we already have assigned the UID a second time */
5bc9c980 818 if (ordered_hashmap_get(todo_uids, UID_TO_PTR(uid)))
1b992147
LP		 819 return 0;
820
821 /* Try to avoid using uids that are already used by a group
822 * that doesn't have the same name as our new user. */
b9ee05c2
MV		 823 if (check_with_gid) {
824 i = ordered_hashmap_get(todo_gids, GID_TO_PTR(uid));
825 if (i && !streq(i->name, name))
826 return 0;
827 }
1b992147
LP		 828
829 /* Let's check the files directly */
71da1673 830 if (hashmap_contains(database_by_uid, UID_TO_PTR(uid)))
1b992147
LP		 831 return 0;
832
b9ee05c2 833 if (check_with_gid) {
71da1673 834 n = hashmap_get(database_by_gid, GID_TO_PTR(uid));
b9ee05c2
MV		 835 if (n && !streq(n, name))
836 return 0;
837 }
1b992147
LP		 838
839 /* Let's also check via NSS, to avoid UID clashes over LDAP and such, just in case */
840 if (!arg_root) {
841 errno = 0;
842 p = getpwuid(uid);
843 if (p)
844 return 0;
b0284aba 845 if (!IN_SET(errno, 0, ENOENT))
1b992147
LP		 846 return -errno;
847
b9ee05c2
MV		 848 if (check_with_gid) {
849 errno = 0;
850 g = getgrgid((gid_t) uid);
851 if (g) {
852 if (!streq(g->gr_name, name))
853 return 0;
854 } else if (!IN_SET(errno, 0, ENOENT))
855 return -errno;
856 }
1b992147
LP		 857 }
858
859 return 1;
860}
861
862static int root_stat(const char *p, struct stat *st) {
863 const char *fix;
864
1d13f648 865 fix = prefix_roota(arg_root, p);
1b992147
LP		 866 if (stat(fix, st) < 0)
867 return -errno;
868
869 return 0;
870}
871
872static int read_id_from_file(Item *i, uid_t *_uid, gid_t *_gid) {
873 struct stat st;
874 bool found_uid = false, found_gid = false;
56d21cde
PDS		 875 uid_t uid = 0;
876 gid_t gid = 0;
1b992147
LP		 877
878 assert(i);
879
880 /* First, try to get the gid directly */
881 if (_gid && i->gid_path && root_stat(i->gid_path, &st) >= 0) {
882 gid = st.st_gid;
883 found_gid = true;
884 }
885
886 /* Then, try to get the uid directly */
887 if ((_uid || (_gid && !found_gid))
888 && i->uid_path
889 && root_stat(i->uid_path, &st) >= 0) {
890
891 uid = st.st_uid;
892 found_uid = true;
893
894 /* If we need the gid, but had no success yet, also derive it from the uid path */
895 if (_gid && !found_gid) {
896 gid = st.st_gid;
897 found_gid = true;
898 }
899 }
900
901 /* If that didn't work yet, then let's reuse the gid as uid */
902 if (_uid && !found_uid && i->gid_path) {
903
904 if (found_gid) {
905 uid = (uid_t) gid;
906 found_uid = true;
907 } else if (root_stat(i->gid_path, &st) >= 0) {
908 uid = (uid_t) st.st_gid;
909 found_uid = true;
910 }
911 }
912
913 if (_uid) {
914 if (!found_uid)
915 return 0;
916
917 *_uid = uid;
918 }
919
920 if (_gid) {
921 if (!found_gid)
922 return 0;
923
924 *_gid = gid;
925 }
926
927 return 1;
928}
929
930static int add_user(Item *i) {
931 void *z;
932 int r;
933
934 assert(i);
935
936 /* Check the database directly */
71da1673 937 z = hashmap_get(database_by_username, i->name);
1b992147
LP		 938 if (z) {
939 log_debug("User %s already exists.", i->name);
c1b6b04f 940 i->uid = PTR_TO_UID(z);
1b992147
LP		 941 i->uid_set = true;
942 return 0;
943 }
944
945 if (!arg_root) {
946 struct passwd *p;
1b992147
LP		 947
948 /* Also check NSS */
949 errno = 0;
950 p = getpwnam(i->name);
951 if (p) {
952 log_debug("User %s already exists.", i->name);
953 i->uid = p->pw_uid;
954 i->uid_set = true;
955
2fc09a9c
DM		 956 r = free_and_strdup(&i->description, p->pw_gecos);
957 if (r < 0)
958 return log_oom();
959
1b992147
LP		 960 return 0;
961 }
08c7c321 962 if (!errno_is_not_exists(errno))
4a62c710 963 return log_error_errno(errno, "Failed to check if user %s already exists: %m", i->name);
1b992147
LP		 964 }
965
966 /* Try to use the suggested numeric uid */
967 if (i->uid_set) {
b9ee05c2 968 r = uid_is_ok(i->uid, i->name, !i->id_set_strict);
f647962d
MS		 969 if (r < 0)
970 return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
1b992147
LP		 971 if (r == 0) {
972 log_debug("Suggested user ID " UID_FMT " for %s already used.", i->uid, i->name);
973 i->uid_set = false;
974 }
975 }
976
977 /* If that didn't work, try to read it from the specified path */
978 if (!i->uid_set) {
979 uid_t c;
980
981 if (read_id_from_file(i, &c, NULL) > 0) {
982
8530dc44 983 if (c <= 0 || !uid_range_contains(uid_range, n_uid_range, c))
1b992147
LP		 984 log_debug("User ID " UID_FMT " of file not suitable for %s.", c, i->name);
985 else {
b9ee05c2 986 r = uid_is_ok(c, i->name, true);
f647962d
MS		 987 if (r < 0)
988 return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
989 else if (r > 0) {
1b992147
LP		 990 i->uid = c;
991 i->uid_set = true;
992 } else
993 log_debug("User ID " UID_FMT " of file for %s is already used.", c, i->name);
994 }
995 }
996 }
997
b938cb90 998 /* Otherwise, try to reuse the group ID */
1b992147 999 if (!i->uid_set && i->gid_set) {
b9ee05c2 1000 r = uid_is_ok((uid_t) i->gid, i->name, true);
f647962d
MS		 1001 if (r < 0)
1002 return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
1b992147
LP		 1003 if (r > 0) {
1004 i->uid = (uid_t) i->gid;
1005 i->uid_set = true;
1006 }
1007 }
1008
1009 /* And if that didn't work either, let's try to find a free one */
1010 if (!i->uid_set) {
8530dc44
LP		 1011 for (;;) {
1012 r = uid_range_next_lower(uid_range, n_uid_range, &search_uid);
330d1def
ZJS		 1013 if (r < 0)
1014 return log_error_errno(r, "No free user ID available for %s.", i->name);
1b992147 1015
b9ee05c2 1016 r = uid_is_ok(search_uid, i->name, true);
f647962d
MS		 1017 if (r < 0)
1018 return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
1019 else if (r > 0)
1b992147
LP		 1020 break;
1021 }
1022
1b992147
LP		 1023 i->uid_set = true;
1024 i->uid = search_uid;
1b992147
LP		 1025 }
1026
5bc9c980 1027 r = ordered_hashmap_ensure_allocated(&todo_uids, NULL);
1b992147
LP		 1028 if (r < 0)
1029 return log_oom();
1030
5bc9c980 1031 r = ordered_hashmap_put(todo_uids, UID_TO_PTR(i->uid), i);
1b992147
LP		 1032 if (r < 0)
1033 return log_oom();
1034
c1b6b04f 1035 i->todo_user = true;
1b992147
LP		 1036 log_info("Creating user %s (%s) with uid " UID_FMT " and gid " GID_FMT ".", i->name, strna(i->description), i->uid, i->gid);
1037
1038 return 0;
1039}
1040
1041static int gid_is_ok(gid_t gid) {
1042 struct group *g;
1043 struct passwd *p;
1044
5bc9c980 1045 if (ordered_hashmap_get(todo_gids, GID_TO_PTR(gid)))
1b992147
LP		 1046 return 0;
1047
1048 /* Avoid reusing gids that are already used by a different user */
5bc9c980 1049 if (ordered_hashmap_get(todo_uids, UID_TO_PTR(gid)))
1b992147
LP		 1050 return 0;
1051
71da1673 1052 if (hashmap_contains(database_by_gid, GID_TO_PTR(gid)))
1b992147
LP		 1053 return 0;
1054
71da1673 1055 if (hashmap_contains(database_by_uid, UID_TO_PTR(gid)))
1b992147
LP		 1056 return 0;
1057
1058 if (!arg_root) {
1059 errno = 0;
1060 g = getgrgid(gid);
1061 if (g)
1062 return 0;
b0284aba 1063 if (!IN_SET(errno, 0, ENOENT))
1b992147
LP		 1064 return -errno;
1065
1066 errno = 0;
1067 p = getpwuid((uid_t) gid);
1068 if (p)
1069 return 0;
b0284aba 1070 if (!IN_SET(errno, 0, ENOENT))
1b992147
LP		 1071 return -errno;
1072 }
1073
1074 return 1;
1075}
1076
649916d3 1077static int get_gid_by_name(const char *name, gid_t *gid) {
1b992147 1078 void *z;
1b992147 1079
649916d3 1080 assert(gid);
1b992147
LP		 1081
1082 /* Check the database directly */
649916d3 1083 z = hashmap_get(database_by_groupname, name);
1b992147 1084 if (z) {
649916d3 1085 *gid = PTR_TO_GID(z);
1b992147
LP		 1086 return 0;
1087 }
1088
1089 /* Also check NSS */
1090 if (!arg_root) {
1091 struct group *g;
1092
1093 errno = 0;
649916d3 1094 g = getgrnam(name);
1b992147 1095 if (g) {
649916d3 1096 *gid = g->gr_gid;
1b992147
LP		 1097 return 0;
1098 }
08c7c321 1099 if (!errno_is_not_exists(errno))
649916d3
DM		 1100 return log_error_errno(errno, "Failed to check if group %s already exists: %m", name);
1101 }
1102
1103 return -ENOENT;
1104}
1105
1106static int add_group(Item *i) {
1107 int r;
1108
1109 assert(i);
1110
1111 r = get_gid_by_name(i->name, &i->gid);
1112 if (r != -ENOENT) {
1113 if (r < 0)
1114 return r;
1115 log_debug("Group %s already exists.", i->name);
1116 i->gid_set = true;
1117 return 0;
1b992147
LP		 1118 }
1119
1120 /* Try to use the suggested numeric gid */
1121 if (i->gid_set) {
1122 r = gid_is_ok(i->gid);
f647962d
MS		 1123 if (r < 0)
1124 return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
b9ee05c2 1125 if (i->id_set_strict) {
28e7fad7
MV		 1126 /* If we require the gid to already exist we can return here:
1127 * r > 0: means the gid does not exist -> fail
1128 * r == 0: means the gid exists -> nothing more to do.
1129 */
baaa35ad
ZJS		 1130 if (r > 0)
1131 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1132 "Failed to create %s: please create GID %d",
1133 i->name, i->gid);
28e7fad7
MV		 1134 if (r == 0)
1135 return 0;
1136 }
1b992147
LP		 1137 if (r == 0) {
1138 log_debug("Suggested group ID " GID_FMT " for %s already used.", i->gid, i->name);
1139 i->gid_set = false;
1140 }
1141 }
1142
1143 /* Try to reuse the numeric uid, if there's one */
1144 if (!i->gid_set && i->uid_set) {
1145 r = gid_is_ok((gid_t) i->uid);
f647962d
MS		 1146 if (r < 0)
1147 return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
1b992147
LP		 1148 if (r > 0) {
1149 i->gid = (gid_t) i->uid;
1150 i->gid_set = true;
1151 }
1152 }
1153
1154 /* If that didn't work, try to read it from the specified path */
1155 if (!i->gid_set) {
1156 gid_t c;
1157
1158 if (read_id_from_file(i, NULL, &c) > 0) {
1159
8530dc44 1160 if (c <= 0 || !uid_range_contains(uid_range, n_uid_range, c))
1b992147
LP		 1161 log_debug("Group ID " GID_FMT " of file not suitable for %s.", c, i->name);
1162 else {
1163 r = gid_is_ok(c);
f647962d
MS		 1164 if (r < 0)
1165 return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
1166 else if (r > 0) {
1b992147
LP		 1167 i->gid = c;
1168 i->gid_set = true;
1169 } else
1170 log_debug("Group ID " GID_FMT " of file for %s already used.", c, i->name);
1171 }
1172 }
1173 }
1174
1175 /* And if that didn't work either, let's try to find a free one */
1176 if (!i->gid_set) {
8530dc44
LP		 1177 for (;;) {
1178 /* We look for new GIDs in the UID pool! */
1179 r = uid_range_next_lower(uid_range, n_uid_range, &search_uid);
330d1def
ZJS		 1180 if (r < 0)
1181 return log_error_errno(r, "No free group ID available for %s.", i->name);
8530dc44
LP		 1182
1183 r = gid_is_ok(search_uid);
f647962d
MS		 1184 if (r < 0)
1185 return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
1186 else if (r > 0)
1b992147
LP		 1187 break;
1188 }
1189
1b992147 1190 i->gid_set = true;
8530dc44 1191 i->gid = search_uid;
1b992147
LP		 1192 }
1193
5bc9c980 1194 r = ordered_hashmap_ensure_allocated(&todo_gids, NULL);
1b992147
LP		 1195 if (r < 0)
1196 return log_oom();
1197
5bc9c980 1198 r = ordered_hashmap_put(todo_gids, GID_TO_PTR(i->gid), i);
1b992147
LP		 1199 if (r < 0)
1200 return log_oom();
1201
c1b6b04f 1202 i->todo_group = true;
1b992147
LP		 1203 log_info("Creating group %s with gid " GID_FMT ".", i->name, i->gid);
1204
1205 return 0;
1206}
1207
1208static int process_item(Item *i) {
1209 int r;
1210
1211 assert(i);
1212
1213 switch (i->type) {
1214
b5327d0a
YW		 1215 case ADD_USER: {
1216 Item *j;
1217
649916d3 1218 j = ordered_hashmap_get(groups, i->group_name ?: i->name);
b5327d0a 1219 if (j && j->todo_group) {
649916d3 1220 /* When a group with the target name is already in queue,
b5327d0a
YW		 1221 * use the information about the group and do not create
1222 * duplicated group entry. */
1223 i->gid_set = j->gid_set;
1224 i->gid = j->gid;
1225 i->id_set_strict = true;
649916d3
DM		 1226 } else if (i->group_name) {
1227 /* When a group name was given instead of a GID and it's
1228 * not in queue, then it must already exist. */
1229 r = get_gid_by_name(i->group_name, &i->gid);
1230 if (r < 0)
1231 return log_error_errno(r, "Group %s not found.", i->group_name);
1232 i->gid_set = true;
1233 i->id_set_strict = true;
b5327d0a
YW		 1234 } else {
1235 r = add_group(i);
1236 if (r < 0)
1237 return r;
1238 }
1b992147
LP		 1239
1240 return add_user(i);
b5327d0a 1241 }
1b992147 1242
e2c2060f 1243 case ADD_GROUP:
1b992147 1244 return add_group(i);
1b992147 1245
a12b0cc3
LP		 1246 default:
1247 assert_not_reached("Unknown item type");
1248 }
1b992147
LP		 1249}
1250
71da1673 1251static Item* item_free(Item *i) {
1b992147 1252 if (!i)
71da1673 1253 return NULL;
1b992147
LP		 1254
1255 free(i->name);
649916d3 1256 free(i->group_name);
1b992147
LP		 1257 free(i->uid_path);
1258 free(i->gid_path);
1259 free(i->description);
d9b8ea54 1260 free(i->home);
7b1aaf66 1261 free(i->shell);
71da1673 1262 return mfree(i);
1b992147
LP		 1263}
1264
1265DEFINE_TRIVIAL_CLEANUP_FUNC(Item*, item_free);
71da1673 1266DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(item_hash_ops, char, string_hash_func, string_compare_func, Item, item_free);
1b992147 1267
a12b0cc3
LP		 1268static int add_implicit(void) {
1269 char *g, **l;
1270 Iterator iterator;
1271 int r;
1272
1273 /* Implicitly create additional users and groups, if they were listed in "m" lines */
5bc9c980 1274 ORDERED_HASHMAP_FOREACH_KEY(l, g, members, iterator) {
a12b0cc3
LP		 1275 char **m;
1276
d4f0412d
YW		 1277 STRV_FOREACH(m, l)
1278 if (!ordered_hashmap_get(users, *m)) {
a12b0cc3
LP		 1279 _cleanup_(item_freep) Item *j = NULL;
1280
71da1673 1281 r = ordered_hashmap_ensure_allocated(&users, &item_hash_ops);
a12b0cc3
LP		 1282 if (r < 0)
1283 return log_oom();
1284
1285 j = new0(Item, 1);
1286 if (!j)
1287 return log_oom();
1288
1289 j->type = ADD_USER;
1290 j->name = strdup(*m);
1291 if (!j->name)
1292 return log_oom();
1293
5bc9c980 1294 r = ordered_hashmap_put(users, j->name, j);
a12b0cc3
LP		 1295 if (r < 0)
1296 return log_oom();
1297
1298 log_debug("Adding implicit user '%s' due to m line", j->name);
1299 j = NULL;
1300 }
d4f0412d
YW		 1301
1302 if (!(ordered_hashmap_get(users, g) ||
1303 ordered_hashmap_get(groups, g))) {
1304 _cleanup_(item_freep) Item *j = NULL;
1305
71da1673 1306 r = ordered_hashmap_ensure_allocated(&groups, &item_hash_ops);
d4f0412d
YW		 1307 if (r < 0)
1308 return log_oom();
1309
1310 j = new0(Item, 1);
1311 if (!j)
1312 return log_oom();
1313
1314 j->type = ADD_GROUP;
1315 j->name = strdup(g);
1316 if (!j->name)
1317 return log_oom();
1318
1319 r = ordered_hashmap_put(groups, j->name, j);
1320 if (r < 0)
1321 return log_oom();
1322
1323 log_debug("Adding implicit group '%s' due to m line", j->name);
1324 j = NULL;
a12b0cc3
LP		 1325 }
1326 }
1327
1328 return 0;
1329}
1330
1b992147
LP		 1331static bool item_equal(Item *a, Item *b) {
1332 assert(a);
1333 assert(b);
1334
1335 if (a->type != b->type)
1336 return false;
1337
1338 if (!streq_ptr(a->name, b->name))
1339 return false;
1340
1341 if (!streq_ptr(a->uid_path, b->uid_path))
1342 return false;
1343
1344 if (!streq_ptr(a->gid_path, b->gid_path))
1345 return false;
1346
1347 if (!streq_ptr(a->description, b->description))
1348 return false;
1349
1350 if (a->uid_set != b->uid_set)
1351 return false;
1352
1353 if (a->uid_set && a->uid != b->uid)
1354 return false;
1355
1356 if (a->gid_set != b->gid_set)
1357 return false;
1358
1359 if (a->gid_set && a->gid != b->gid)
1360 return false;
1361
7629889c
LP		 1362 if (!streq_ptr(a->home, b->home))
1363 return false;
1364
7b1aaf66
ZJS		 1365 if (!streq_ptr(a->shell, b->shell))
1366 return false;
1367
1b992147
LP		 1368 return true;
1369}
1370
1b992147
LP		 1371static int parse_line(const char *fname, unsigned line, const char *buffer) {
1372
1373 static const Specifier specifier_table[] = {
e97708fa
ZJS		 1374 { 'm', specifier_machine_id, NULL },
1375 { 'b', specifier_boot_id, NULL },
1376 { 'H', specifier_host_name, NULL },
1377 { 'l', specifier_short_host_name, NULL },
1378 { 'v', specifier_kernel_release, NULL },
1379 { 'a', specifier_architecture, NULL },
1380 { 'o', specifier_os_id, NULL },
1381 { 'w', specifier_os_version_id, NULL },
1382 { 'B', specifier_os_build_id, NULL },
1383 { 'W', specifier_os_variant_id, NULL },
1384 { 'T', specifier_tmp_dir, NULL },
1385 { 'V', specifier_var_tmp_dir, NULL },
1b992147
LP		 1386 {}
1387 };
1388
7b1aaf66
ZJS		 1389 _cleanup_free_ char *action = NULL,
1390 *name = NULL, *resolved_name = NULL,
1391 *id = NULL, *resolved_id = NULL,
b8bed700
YW		 1392 *description = NULL, *resolved_description = NULL,
1393 *home = NULL, *resolved_home = NULL,
71fb1588 1394 *shell = NULL, *resolved_shell = NULL;
1b992147
LP		 1395 _cleanup_(item_freep) Item *i = NULL;
1396 Item *existing;
5bc9c980 1397 OrderedHashmap *h;
7629889c
LP		 1398 int r;
1399 const char *p;
1b992147
LP		 1400
1401 assert(fname);
1402 assert(line >= 1);
1403 assert(buffer);
1404
7629889c
LP		 1405 /* Parse columns */
1406 p = buffer;
4ec85141 1407 r = extract_many_words(&p, NULL, EXTRACT_UNQUOTE,
7b1aaf66 1408 &action, &name, &id, &description, &home, &shell, NULL);
330d1def
ZJS		 1409 if (r < 0)
1410 return log_error_errno(r, "[%s:%u] Syntax error.", fname, line);
1411 if (r < 2)
1412 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1413 "[%s:%u] Missing action and name columns.", fname, line);
1414 if (!isempty(p))
1415 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1416 "[%s:%u] Trailing garbage.", fname, line);
1b992147 1417
7629889c 1418 /* Verify action */
330d1def
ZJS		 1419 if (strlen(action) != 1)
1420 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1421 "[%s:%u] Unknown modifier '%s'", fname, line, action);
1b992147 1422
330d1def
ZJS		 1423 if (!IN_SET(action[0], ADD_USER, ADD_GROUP, ADD_MEMBER, ADD_RANGE))
1424 return log_error_errno(SYNTHETIC_ERRNO(EBADMSG),
1425 "[%s:%u] Unknown command type '%c'.", fname, line, action[0]);
1b992147 1426
7629889c 1427 /* Verify name */
e7b88b7b 1428 if (empty_or_dash(name))
97b11eed 1429 name = mfree(name);
1b992147 1430
8530dc44
LP		 1431 if (name) {
1432 r = specifier_printf(name, specifier_table, NULL, &resolved_name);
330d1def 1433 if (r < 0)
0f7e4b28 1434 return log_error_errno(r, "[%s:%u] Failed to replace specifiers in '%s': %m", fname, line, name);
8530dc44 1435
7a8867ab 1436 if (!valid_user_group_name(resolved_name, 0))
330d1def
ZJS		 1437 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1438 "[%s:%u] '%s' is not a valid user or group name.",
1439 fname, line, resolved_name);
1b992147
LP		 1440 }
1441
8530dc44 1442 /* Verify id */
e7b88b7b 1443 if (empty_or_dash(id))
97b11eed 1444 id = mfree(id);
7629889c 1445
8530dc44
LP		 1446 if (id) {
1447 r = specifier_printf(id, specifier_table, NULL, &resolved_id);
330d1def 1448 if (r < 0)
0f7e4b28 1449 return log_error_errno(r, "[%s:%u] Failed to replace specifiers in '%s': %m",
330d1def 1450 fname, line, name);
8530dc44
LP		 1451 }
1452
1453 /* Verify description */
e7b88b7b 1454 if (empty_or_dash(description))
97b11eed 1455 description = mfree(description);
1b992147 1456
8530dc44 1457 if (description) {
b8bed700 1458 r = specifier_printf(description, specifier_table, NULL, &resolved_description);
330d1def 1459 if (r < 0)
0f7e4b28 1460 return log_error_errno(r, "[%s:%u] Failed to replace specifiers in '%s': %m",
330d1def 1461 fname, line, description);
b8bed700 1462
330d1def
ZJS		 1463 if (!valid_gecos(resolved_description))
1464 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1465 "[%s:%u] '%s' is not a valid GECOS field.",
1466 fname, line, resolved_description);
8530dc44
LP		 1467 }
1468
1469 /* Verify home */
e7b88b7b 1470 if (empty_or_dash(home))
97b11eed 1471 home = mfree(home);
1b992147 1472
8530dc44 1473 if (home) {
b8bed700 1474 r = specifier_printf(home, specifier_table, NULL, &resolved_home);
330d1def 1475 if (r < 0)
0f7e4b28 1476 return log_error_errno(r, "[%s:%u] Failed to replace specifiers in '%s': %m",
330d1def 1477 fname, line, home);
b8bed700 1478
330d1def
ZJS		 1479 if (!valid_home(resolved_home))
1480 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1481 "[%s:%u] '%s' is not a valid home directory field.",
1482 fname, line, resolved_home);
8530dc44
LP		 1483 }
1484
7b1aaf66 1485 /* Verify shell */
e7b88b7b 1486 if (empty_or_dash(shell))
7b1aaf66
ZJS		 1487 shell = mfree(shell);
1488
1489 if (shell) {
1490 r = specifier_printf(shell, specifier_table, NULL, &resolved_shell);
330d1def 1491 if (r < 0)
0f7e4b28 1492 return log_error_errno(r, "[%s:%u] Failed to replace specifiers in '%s': %m",
330d1def 1493 fname, line, shell);
7b1aaf66 1494
330d1def
ZJS		 1495 if (!valid_shell(resolved_shell))
1496 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1497 "[%s:%u] '%s' is not a valid login shell field.",
1498 fname, line, resolved_shell);
7b1aaf66
ZJS		 1499 }
1500
a12b0cc3 1501 switch (action[0]) {
1b992147 1502
8530dc44 1503 case ADD_RANGE:
330d1def
ZJS		 1504 if (resolved_name)
1505 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1506 "[%s:%u] Lines of type 'r' don't take a name field.",
1507 fname, line);
1508
1509 if (!resolved_id)
1510 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1511 "[%s:%u] Lines of type 'r' require a ID range in the third field.",
1512 fname, line);
1513
1514 if (description || home || shell)
1515 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1516 "[%s:%u] Lines of type '%c' don't take a %s field.",
1517 fname, line, action[0],
1518 description ? "GECOS" : home ? "home directory" : "login shell");
7629889c 1519
8530dc44 1520 r = uid_range_add_str(&uid_range, &n_uid_range, resolved_id);
330d1def
ZJS		 1521 if (r < 0)
1522 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1523 "[%s:%u] Invalid UID range %s.", fname, line, resolved_id);
1b992147 1524
8530dc44
LP		 1525 return 0;
1526
1527 case ADD_MEMBER: {
8530dc44 1528 /* Try to extend an existing member or group item */
330d1def
ZJS		 1529 if (!name)
1530 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1531 "[%s:%u] Lines of type 'm' require a user name in the second field.",
1532 fname, line);
1533
1534 if (!resolved_id)
1535 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1536 "[%s:%u] Lines of type 'm' require a group name in the third field.",
1537 fname, line);
1538
7a8867ab 1539 if (!valid_user_group_name(resolved_id, 0))
330d1def
ZJS		 1540 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1541 "[%s:%u] '%s' is not a valid user or group name.",
1542 fname, line, resolved_id);
1543
1544 if (description || home || shell)
1545 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1546 "[%s:%u] Lines of type '%c' don't take a %s field.",
1547 fname, line, action[0],
1548 description ? "GECOS" : home ? "home directory" : "login shell");
8530dc44 1549
cde79109 1550 r = string_strv_ordered_hashmap_put(&members, resolved_id, resolved_name);
7629889c 1551 if (r < 0)
cde79109 1552 return log_error_errno(r, "Failed to store mapping for %s: %m", resolved_id);
a12b0cc3
LP		 1553
1554 return 0;
1b992147
LP		 1555 }
1556
a12b0cc3 1557 case ADD_USER:
330d1def
ZJS		 1558 if (!name)
1559 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1560 "[%s:%u] Lines of type 'u' require a user name in the second field.",
1561 fname, line);
8530dc44 1562
71da1673 1563 r = ordered_hashmap_ensure_allocated(&users, &item_hash_ops);
a12b0cc3
LP		 1564 if (r < 0)
1565 return log_oom();
1566
1567 i = new0(Item, 1);
1568 if (!i)
1569 return log_oom();
1570
8530dc44
LP		 1571 if (resolved_id) {
1572 if (path_is_absolute(resolved_id)) {
1cc6c93a 1573 i->uid_path = TAKE_PTR(resolved_id);
858d36c1 1574 path_simplify(i->uid_path, false);
a12b0cc3 1575 } else {
4cb41413
MV		 1576 _cleanup_free_ char *uid = NULL, *gid = NULL;
1577 if (split_pair(resolved_id, ":", &uid, &gid) == 0) {
1578 r = parse_gid(gid, &i->gid);
649916d3 1579 if (r < 0) {
7a8867ab 1580 if (valid_user_group_name(gid, 0))
649916d3
DM		 1581 i->group_name = TAKE_PTR(gid);
1582 else
1583 return log_error_errno(r, "Failed to parse GID: '%s': %m", id);
1584 } else {
1585 i->gid_set = true;
1586 i->id_set_strict = true;
1587 }
4cb41413 1588 free_and_replace(resolved_id, uid);
a12b0cc3 1589 }
1825c909
MV		 1590 if (!streq(resolved_id, "-")) {
1591 r = parse_uid(resolved_id, &i->uid);
1592 if (r < 0)
1593 return log_error_errno(r, "Failed to parse UID: '%s': %m", id);
1594 i->uid_set = true;
1595 }
a12b0cc3
LP		 1596 }
1597 }
1598
b8bed700
YW		 1599 i->description = TAKE_PTR(resolved_description);
1600 i->home = TAKE_PTR(resolved_home);
1cc6c93a 1601 i->shell = TAKE_PTR(resolved_shell);
7b1aaf66 1602
1b992147 1603 h = users;
a12b0cc3
LP		 1604 break;
1605
1606 case ADD_GROUP:
330d1def
ZJS		 1607 if (!name)
1608 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1609 "[%s:%u] Lines of type 'g' require a user name in the second field.",
1610 fname, line);
a12b0cc3 1611
330d1def
ZJS		 1612 if (description || home || shell)
1613 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1614 "[%s:%u] Lines of type '%c' don't take a %s field.",
1615 fname, line, action[0],
1616 description ? "GECOS" : home ? "home directory" : "login shell");
7629889c 1617
71da1673 1618 r = ordered_hashmap_ensure_allocated(&groups, &item_hash_ops);
7629889c
LP		 1619 if (r < 0)
1620 return log_oom();
1621
a12b0cc3
LP		 1622 i = new0(Item, 1);
1623 if (!i)
1624 return log_oom();
1625
8530dc44
LP		 1626 if (resolved_id) {
1627 if (path_is_absolute(resolved_id)) {
1cc6c93a 1628 i->gid_path = TAKE_PTR(resolved_id);
858d36c1 1629 path_simplify(i->gid_path, false);
a12b0cc3 1630 } else {
8530dc44 1631 r = parse_gid(resolved_id, &i->gid);
4cb41413
MV		 1632 if (r < 0)
1633 return log_error_errno(r, "Failed to parse GID: '%s': %m", id);
a12b0cc3
LP		 1634
1635 i->gid_set = true;
1636 }
1637 }
1638
1b992147 1639 h = groups;
a12b0cc3 1640 break;
8530dc44 1641
bce415ed
RC		 1642 default:
1643 return -EBADMSG;
1b992147 1644 }
a12b0cc3
LP		 1645
1646 i->type = action[0];
1cc6c93a 1647 i->name = TAKE_PTR(resolved_name);
1b992147 1648
5bc9c980 1649 existing = ordered_hashmap_get(h, i->name);
1b992147 1650 if (existing) {
1b992147
LP		 1651 /* Two identical items are fine */
1652 if (!item_equal(existing, i))
1653 log_warning("Two or more conflicting lines for %s configured, ignoring.", i->name);
1654
1655 return 0;
1656 }
1657
5bc9c980 1658 r = ordered_hashmap_put(h, i->name, i);
a12b0cc3
LP		 1659 if (r < 0)
1660 return log_oom();
1b992147
LP		 1661
1662 i = NULL;
1663 return 0;
1664}
1665
1666static int read_config_file(const char *fn, bool ignore_enoent) {
dfc87cbf
LP		 1667 _cleanup_fclose_ FILE *rf = NULL;
1668 FILE *f = NULL;
1b992147 1669 unsigned v = 0;
c4640902 1670 int r = 0;
1b992147
LP		 1671
1672 assert(fn);
1673
dfc87cbf
LP		 1674 if (streq(fn, "-"))
1675 f = stdin;
1676 else {
a826d4f7 1677 r = search_and_fopen(fn, "re", arg_root, (const char**) CONF_PATHS_STRV("sysusers.d"), &rf);
dfc87cbf
LP		 1678 if (r < 0) {
1679 if (ignore_enoent && r == -ENOENT)
1680 return 0;
1b992147 1681
8d3d7072 1682 return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn);
dfc87cbf
LP		 1683 }
1684
1685 f = rf;
1b992147
LP		 1686 }
1687
050ca299
LP		 1688 for (;;) {
1689 _cleanup_free_ char *line = NULL;
1b992147
LP		 1690 char *l;
1691 int k;
1692
050ca299
LP		 1693 k = read_line(f, LONG_LINE_MAX, &line);
1694 if (k < 0)
1695 return log_error_errno(k, "Failed to read '%s': %m", fn);
1696 if (k == 0)
1697 break;
1698
1b992147
LP		 1699 v++;
1700
1701 l = strstrip(line);
4c701096 1702 if (IN_SET(*l, 0, '#'))
1b992147
LP		 1703 continue;
1704
1705 k = parse_line(fn, v, l);
1706 if (k < 0 && r == 0)
1707 r = k;
1708 }
1709
1710 if (ferror(f)) {
56f64d95 1711 log_error_errno(errno, "Failed to read from file %s: %m", fn);
1b992147
LP		 1712 if (r == 0)
1713 r = -EIO;
1714 }
1715
1716 return r;
1717}
1718
ec0327d6
ZJS		 1719static int cat_config(void) {
1720 _cleanup_strv_free_ char **files = NULL;
ec0327d6
ZJS		 1721 int r;
1722
a826d4f7 1723 r = conf_files_list_with_replacement(arg_root, CONF_PATHS_STRV("sysusers.d"), arg_replace, &files, NULL);
ec0327d6
ZJS		 1724 if (r < 0)
1725 return r;
1726
0221d68a 1727 (void) pager_open(arg_pager_flags);
dcd5c891 1728
ec0327d6
ZJS		 1729 return cat_files(NULL, files, 0);
1730}
1731
37ec0fdd
LP		 1732static int help(void) {
1733 _cleanup_free_ char *link = NULL;
1734 int r;
1735
1736 r = terminal_urlify_man("systemd-sysusers.service", "8", &link);
1737 if (r < 0)
1738 return log_oom();
1739
1b992147
LP		 1740 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
1741 "Creates system user accounts.\n\n"
1742 " -h --help Show this help\n"
1743 " --version Show package version\n"
ec0327d6 1744 " --cat-config Show configuration files\n"
601185b4 1745 " --root=PATH Operate on an alternate filesystem root\n"
0c3ee127 1746 " --image=PATH Operate on disk image as filesystem root\n"
d16a1c1b 1747 " --replace=PATH Treat arguments as replacement for PATH\n"
1b600bd5 1748 " --inline Treat arguments as configuration lines\n"
dcd5c891 1749 " --no-pager Do not pipe output into a pager\n"
37ec0fdd
LP		 1750 "\nSee the %s for details.\n"
1751 , program_invocation_short_name
1752 , link
1753 );
1754
1755 return 0;
1b992147
LP		 1756}
1757
1758static int parse_argv(int argc, char *argv[]) {
1759
1760 enum {
1761 ARG_VERSION = 0x100,
ec0327d6 1762 ARG_CAT_CONFIG,
1b992147 1763 ARG_ROOT,
0c3ee127 1764 ARG_IMAGE,
d16a1c1b 1765 ARG_REPLACE,
1b600bd5 1766 ARG_INLINE,
dcd5c891 1767 ARG_NO_PAGER,
1b992147
LP		 1768 };
1769
1770 static const struct option options[] = {
ec0327d6
ZJS		 1771 { "help", no_argument, NULL, 'h' },
1772 { "version", no_argument, NULL, ARG_VERSION },
1773 { "cat-config", no_argument, NULL, ARG_CAT_CONFIG },
1774 { "root", required_argument, NULL, ARG_ROOT },
0c3ee127 1775 { "image", required_argument, NULL, ARG_IMAGE },
ec0327d6
ZJS		 1776 { "replace", required_argument, NULL, ARG_REPLACE },
1777 { "inline", no_argument, NULL, ARG_INLINE },
dcd5c891 1778 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
1b992147
LP		 1779 {}
1780 };
1781
0f474365 1782 int c, r;
1b992147
LP		 1783
1784 assert(argc >= 0);
1785 assert(argv);
1786
601185b4 1787 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
1b992147
LP		 1788
1789 switch (c) {
1790
1791 case 'h':
37ec0fdd 1792 return help();
1b992147
LP		 1793
1794 case ARG_VERSION:
3f6fd1ba 1795 return version();
1b992147 1796
ec0327d6
ZJS		 1797 case ARG_CAT_CONFIG:
1798 arg_cat_config = true;
1799 break;
1800
1b992147 1801 case ARG_ROOT:
7dc6477d 1802 r = parse_path_argument_and_warn(optarg, /* suppress_root= */ false, &arg_root);
0f474365 1803 if (r < 0)
0f03c2a4 1804 return r;
1b992147
LP		 1805 break;
1806
0c3ee127
LP		 1807 case ARG_IMAGE:
1808 r = parse_path_argument_and_warn(optarg, /* suppress_root= */ false, &arg_image);
1809 if (r < 0)
1810 return r;
1811 break;
1812
d16a1c1b
ZJS		 1813 case ARG_REPLACE:
1814 if (!path_is_absolute(optarg) ||
baaa35ad
ZJS		 1815 !endswith(optarg, ".conf"))
1816 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1817 "The argument to --replace= must an absolute path to a config file");
d16a1c1b
ZJS		 1818
1819 arg_replace = optarg;
1820 break;
1821
1b600bd5
ZJS		 1822 case ARG_INLINE:
1823 arg_inline = true;
1824 break;
1825
dcd5c891 1826 case ARG_NO_PAGER:
0221d68a 1827 arg_pager_flags |= PAGER_DISABLE;
dcd5c891
LP		 1828 break;
1829
1b992147
LP		 1830 case '?':
1831 return -EINVAL;
1832
1833 default:
1834 assert_not_reached("Unhandled option");
1835 }
1b992147 1836
baaa35ad
ZJS		 1837 if (arg_replace && arg_cat_config)
1838 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1839 "Option --replace= is not supported with --cat-config");
ec0327d6 1840
baaa35ad
ZJS		 1841 if (arg_replace && optind >= argc)
1842 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1843 "When --replace= is given, some configuration items must be specified");
d16a1c1b 1844
0c3ee127
LP		 1845 if (arg_image && arg_root)
1846 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Please specify either --root= or --image=, the combination of both is not supported.");
1847
1b992147
LP		 1848 return 1;
1849}
1850
d16a1c1b
ZJS		 1851static int parse_arguments(char **args) {
1852 char **arg;
1853 unsigned pos = 1;
1854 int r;
1855
1856 STRV_FOREACH(arg, args) {
1857 if (arg_inline)
1858 /* Use (argument):n, where n==1 for the first positional arg */
1859 r = parse_line("(argument)", pos, *arg);
1860 else
1861 r = read_config_file(*arg, false);
1862 if (r < 0)
1863 return r;
1864
1865 pos++;
1866 }
1867
1868 return 0;
1869}
1870
ec0327d6 1871static int read_config_files(char **args) {
d16a1c1b
ZJS		 1872 _cleanup_strv_free_ char **files = NULL;
1873 _cleanup_free_ char *p = NULL;
1874 char **f;
1875 int r;
1876
a826d4f7 1877 r = conf_files_list_with_replacement(arg_root, CONF_PATHS_STRV("sysusers.d"), arg_replace, &files, &p);
d16a1c1b 1878 if (r < 0)
ec0327d6 1879 return r;
d16a1c1b
ZJS		 1880
1881 STRV_FOREACH(f, files)
1882 if (p && path_equal(*f, p)) {
1883 log_debug("Parsing arguments at position \"%s\"…", *f);
1884
1885 r = parse_arguments(args);
1886 if (r < 0)
1887 return r;
1888 } else {
1889 log_debug("Reading config file \"%s\"…", *f);
1890
1891 /* Just warn, ignore result otherwise */
1892 (void) read_config_file(*f, true);
1893 }
1894
1895 return 0;
1896}
1897
71da1673 1898static int run(int argc, char *argv[]) {
0c3ee127
LP		 1899 _cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL;
1900 _cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL;
1901 _cleanup_(umount_and_rmdir_and_freep) char *unlink_dir = NULL;
1b992147
LP		 1902 _cleanup_close_ int lock = -1;
1903 Iterator iterator;
1b992147 1904 Item *i;
dd2fd972 1905 int r;
1b992147
LP		 1906
1907 r = parse_argv(argc, argv);
1908 if (r <= 0)
71da1673 1909 return r;
1b992147 1910
6bf3c61c 1911 log_setup_service();
1b992147 1912
71da1673
YW		 1913 if (arg_cat_config)
1914 return cat_config();
ec0327d6 1915
1b992147
LP		 1916 umask(0022);
1917
c3dacc8b 1918 r = mac_selinux_init();
71da1673 1919 if (r < 0)
a9ba0e32 1920 return r;
1b992147 1921
0c3ee127
LP		 1922 if (arg_image) {
1923 assert(!arg_root);
1924
1925 r = mount_image_privately_interactively(
1926 arg_image,
1927 DISSECT_IMAGE_REQUIRE_ROOT|DISSECT_IMAGE_VALIDATE_OS|DISSECT_IMAGE_RELAX_VAR_CHECK|DISSECT_IMAGE_FSCK,
1928 &unlink_dir,
1929 &loop_device,
1930 &decrypted_image);
1931 if (r < 0)
1932 return r;
1933
1934 arg_root = strdup(unlink_dir);
1935 if (!arg_root)
1936 return log_oom();
1937 }
1938
d16a1c1b
ZJS		 1939 /* If command line arguments are specified along with --replace, read all
1940 * configuration files and insert the positional arguments at the specified
1941 * place. Otherwise, if command line arguments are specified, execute just
1942 * them, and finally, without --replace= or any positional arguments, just
1943 * read configuration and execute it.
1944 */
1945 if (arg_replace || optind >= argc)
ec0327d6 1946 r = read_config_files(argv + optind);
d16a1c1b
ZJS		 1947 else
1948 r = parse_arguments(argv + optind);
1949 if (r < 0)
71da1673 1950 return r;
1b992147 1951
fe102d6a
LP		 1952 /* Let's tell nss-systemd not to synthesize the "root" and "nobody" entries for it, so that our detection
1953 * whether the names or UID/GID area already used otherwise doesn't get confused. After all, even though
1954 * nss-systemd synthesizes these users/groups, they should still appear in /etc/passwd and /etc/group, as the
1955 * synthesizing logic is merely supposed to be fallback for cases where we run with a completely unpopulated
1956 * /etc. */
71da1673
YW		 1957 if (setenv("SYSTEMD_NSS_BYPASS_SYNTHETIC", "1", 1) < 0)
1958 return log_error_errno(errno, "Failed to set SYSTEMD_NSS_BYPASS_SYNTHETIC environment variable: %m");
fe102d6a 1959
8530dc44 1960 if (!uid_range) {
b9ee05c2 1961 /* Default to default range of 1..SYSTEM_UID_MAX */
8530dc44 1962 r = uid_range_add(&uid_range, &n_uid_range, 1, SYSTEM_UID_MAX);
71da1673
YW		 1963 if (r < 0)
1964 return log_oom();
8530dc44
LP		 1965 }
1966
a12b0cc3
LP		 1967 r = add_implicit();
1968 if (r < 0)
71da1673 1969 return r;
a12b0cc3 1970
e929bee0 1971 lock = take_etc_passwd_lock(arg_root);
71da1673
YW		 1972 if (lock < 0)
1973 return log_error_errno(lock, "Failed to take /etc/passwd lock: %m");
1b992147
LP		 1974
1975 r = load_user_database();
71da1673
YW		 1976 if (r < 0)
1977 return log_error_errno(r, "Failed to load user database: %m");
1b992147
LP		 1978
1979 r = load_group_database();
71da1673
YW		 1980 if (r < 0)
1981 return log_error_errno(r, "Failed to read group database: %m");
1b992147 1982
5bc9c980 1983 ORDERED_HASHMAP_FOREACH(i, groups, iterator)
c1a32819 1984 (void) process_item(i);
1b992147 1985
5bc9c980 1986 ORDERED_HASHMAP_FOREACH(i, users, iterator)
c1a32819 1987 (void) process_item(i);
1b992147
LP		 1988
1989 r = write_files();
1990 if (r < 0)
71da1673 1991 return log_error_errno(r, "Failed to write files: %m");
1b992147 1992
71da1673 1993 return 0;
1b992147 1994}
71da1673
YW		 1995
1996DEFINE_MAIN_FUNCTION(run);
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