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[thirdparty/systemd.git] / src / sysusers / sysusers.c
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db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
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"
d481b830 18#include "nscd-flush.h"
dcd5c891 19#include "pager.h"
614b022c 20#include "parse-argument.h"
3f6fd1ba 21#include "path-util.h"
294bf0c3 22#include "pretty-print.h"
3f6fd1ba 23#include "selinux-util.h"
0c3ee127 24#include "set.h"
07630cea 25#include "smack-util.h"
3f6fd1ba 26#include "specifier.h"
07630cea 27#include "string-util.h"
3f6fd1ba 28#include "strv.h"
e4de7287 29#include "tmpfile-util-label.h"
3f6fd1ba 30#include "uid-range.h"
aa25270c 31#include "user-record.h"
a0f29c76 32#include "user-util.h"
3f6fd1ba
LP		 33#include "utf8.h"
34#include "util.h"
1b992147
LP		 35
36typedef enum ItemType {
37 ADD_USER = 'u',
38 ADD_GROUP = 'g',
a12b0cc3 39 ADD_MEMBER = 'm',
8530dc44 40 ADD_RANGE = 'r',
1b992147 41} ItemType;
dcd5c891 42
1b992147
LP		 43typedef struct Item {
44 ItemType type;
45
46 char *name;
649916d3 47 char *group_name;
1b992147
LP		 48 char *uid_path;
49 char *gid_path;
50 char *description;
7629889c 51 char *home;
7b1aaf66 52 char *shell;
1b992147
LP		 53
54 gid_t gid;
55 uid_t uid;
56
57 bool gid_set:1;
fb959f14
ZJS		 58
59 /* When set the group with the specified gid must exist
60 * and the check if a uid clashes with the gid is skipped.
61 */
b9ee05c2 62 bool id_set_strict:1;
fb959f14 63
1b992147
LP		 64 bool uid_set:1;
65
c1b6b04f
KS		 66 bool todo_user:1;
67 bool todo_group:1;
1b992147
LP		 68} Item;
69
70static char *arg_root = NULL;
0c3ee127 71static char *arg_image = NULL;
ec0327d6 72static bool arg_cat_config = false;
d16a1c1b 73static const char *arg_replace = NULL;
1b600bd5 74static bool arg_inline = false;
0221d68a 75static PagerFlags arg_pager_flags = 0;
1b992147 76
5bc9c980
MV		 77static OrderedHashmap *users = NULL, *groups = NULL;
78static OrderedHashmap *todo_uids = NULL, *todo_gids = NULL;
79static OrderedHashmap *members = NULL;
1b992147 80
71da1673
YW		 81static Hashmap *database_by_uid = NULL, *database_by_username = NULL;
82static Hashmap *database_by_gid = NULL, *database_by_groupname = NULL;
83static Set *database_users = NULL, *database_groups = NULL;
1b992147 84
fed1e721 85static uid_t search_uid = UID_INVALID;
8530dc44
LP		 86static UidRange *uid_range = NULL;
87static unsigned n_uid_range = 0;
1b992147 88
4b6f9b20
ZJS		 89static UGIDAllocationRange login_defs = {};
90static bool login_defs_need_warning = false;
91
71da1673
YW		 92STATIC_DESTRUCTOR_REGISTER(groups, ordered_hashmap_freep);
93STATIC_DESTRUCTOR_REGISTER(users, ordered_hashmap_freep);
94STATIC_DESTRUCTOR_REGISTER(members, ordered_hashmap_freep);
95STATIC_DESTRUCTOR_REGISTER(todo_uids, ordered_hashmap_freep);
96STATIC_DESTRUCTOR_REGISTER(todo_gids, ordered_hashmap_freep);
97STATIC_DESTRUCTOR_REGISTER(database_by_uid, hashmap_freep);
98STATIC_DESTRUCTOR_REGISTER(database_by_username, hashmap_freep);
99STATIC_DESTRUCTOR_REGISTER(database_users, set_free_freep);
100STATIC_DESTRUCTOR_REGISTER(database_by_gid, hashmap_freep);
101STATIC_DESTRUCTOR_REGISTER(database_by_groupname, hashmap_freep);
102STATIC_DESTRUCTOR_REGISTER(database_groups, set_free_freep);
103STATIC_DESTRUCTOR_REGISTER(uid_range, freep);
104STATIC_DESTRUCTOR_REGISTER(arg_root, freep);
0c3ee127 105STATIC_DESTRUCTOR_REGISTER(arg_image, freep);
71da1673 106
08c7c321
ZJS		 107static int errno_is_not_exists(int code) {
108 /* See getpwnam(3) and getgrnam(3): those codes and others can be returned if the user or group are
109 * not found. */
110 return IN_SET(code, 0, ENOENT, ESRCH, EBADF, EPERM);
111}
112
4b6f9b20
ZJS		 113static void maybe_emit_login_defs_warning(void) {
114 if (!login_defs_need_warning)
115 return;
116
117 if (login_defs.system_alloc_uid_min != SYSTEM_ALLOC_UID_MIN ||
118 login_defs.system_uid_max != SYSTEM_UID_MAX)
119 log_warning("login.defs specifies UID allocation range "UID_FMT"–"UID_FMT
120 " that is different than the built-in defaults ("UID_FMT"–"UID_FMT")",
121 login_defs.system_alloc_uid_min, login_defs.system_uid_max,
122 SYSTEM_ALLOC_UID_MIN, SYSTEM_UID_MAX);
123 if (login_defs.system_alloc_gid_min != SYSTEM_ALLOC_GID_MIN ||
124 login_defs.system_gid_max != SYSTEM_GID_MAX)
125 log_warning("login.defs specifies GID allocation range "GID_FMT"–"GID_FMT
126 " that is different than the built-in defaults ("GID_FMT"–"GID_FMT")",
127 login_defs.system_alloc_gid_min, login_defs.system_gid_max,
128 SYSTEM_ALLOC_GID_MIN, SYSTEM_GID_MAX);
129
130 login_defs_need_warning = false;
131}
132
1b992147
LP		 133static int load_user_database(void) {
134 _cleanup_fclose_ FILE *f = NULL;
135 const char *passwd_path;
136 struct passwd *pw;
137 int r;
138
1d13f648 139 passwd_path = prefix_roota(arg_root, "/etc/passwd");
1b992147
LP		 140 f = fopen(passwd_path, "re");
141 if (!f)
142 return errno == ENOENT ? 0 : -errno;
143
71da1673 144 r = hashmap_ensure_allocated(&database_by_username, &string_hash_ops);
1b992147
LP		 145 if (r < 0)
146 return r;
147
71da1673 148 r = hashmap_ensure_allocated(&database_by_uid, NULL);
1b992147
LP		 149 if (r < 0)
150 return r;
151
71da1673 152 r = set_ensure_allocated(&database_users, NULL);
1b992147
LP		 153 if (r < 0)
154 return r;
155
100d5f6e 156 while ((r = fgetpwent_sane(f, &pw)) > 0) {
43e948ee 157 char *n;
340ac019 158 int k, q;
1b992147
LP		 159
160 n = strdup(pw->pw_name);
161 if (!n)
162 return -ENOMEM;
163
71da1673
YW		 164 k = set_put(database_users, n);
165 if (k < 0) {
1b992147
LP		 166 free(n);
167 return k;
168 }
169
71da1673
YW		 170 k = hashmap_put(database_by_username, n, UID_TO_PTR(pw->pw_uid));
171 if (k < 0 && k != -EEXIST)
172 return k;
1b992147 173
71da1673
YW		 174 q = hashmap_put(database_by_uid, UID_TO_PTR(pw->pw_uid), n);
175 if (q < 0 && q != -EEXIST)
176 return q;
1b992147 177 }
100d5f6e 178 return r;
1b992147
LP		 179}
180
181static int load_group_database(void) {
182 _cleanup_fclose_ FILE *f = NULL;
183 const char *group_path;
184 struct group *gr;
185 int r;
186
1d13f648 187 group_path = prefix_roota(arg_root, "/etc/group");
1b992147
LP		 188 f = fopen(group_path, "re");
189 if (!f)
190 return errno == ENOENT ? 0 : -errno;
191
71da1673 192 r = hashmap_ensure_allocated(&database_by_groupname, &string_hash_ops);
1b992147
LP		 193 if (r < 0)
194 return r;
195
71da1673 196 r = hashmap_ensure_allocated(&database_by_gid, NULL);
1b992147
LP		 197 if (r < 0)
198 return r;
199
71da1673 200 r = set_ensure_allocated(&database_groups, NULL);
1b992147
LP		 201 if (r < 0)
202 return r;
203
f030d36c 204 while ((r = fgetgrent_sane(f, &gr)) > 0) {
1b992147
LP		 205 char *n;
206 int k, q;
207
208 n = strdup(gr->gr_name);
209 if (!n)
210 return -ENOMEM;
211
71da1673
YW		 212 k = set_put(database_groups, n);
213 if (k < 0) {
1b992147
LP		 214 free(n);
215 return k;
216 }
217
71da1673
YW		 218 k = hashmap_put(database_by_groupname, n, GID_TO_PTR(gr->gr_gid));
219 if (k < 0 && k != -EEXIST)
220 return k;
1b992147 221
71da1673
YW		 222 q = hashmap_put(database_by_gid, GID_TO_PTR(gr->gr_gid), n);
223 if (q < 0 && q != -EEXIST)
224 return q;
1b992147 225 }
f030d36c 226 return r;
1b992147
LP		 227}
228
9f1c1940 229static int make_backup(const char *target, const char *x) {
62c03398 230 _cleanup_(unlink_and_freep) char *dst_tmp = NULL;
9f1c1940 231 _cleanup_fclose_ FILE *dst = NULL;
62c03398
LP		 232 _cleanup_close_ int src = -1;
233 const char *backup;
1b992147
LP		 234 struct stat st;
235 int r;
236
62c03398
LP		 237 assert(target);
238 assert(x);
239
1b992147
LP		 240 src = open(x, O_RDONLY|O_CLOEXEC|O_NOCTTY);
241 if (src < 0) {
242 if (errno == ENOENT) /* No backup necessary... */
243 return 0;
244
245 return -errno;
246 }
247
248 if (fstat(src, &st) < 0)
249 return -errno;
250
62c03398
LP		 251 r = fopen_temporary_label(
252 target, /* The path for which to the lookup the label */
253 x, /* Where we want the file actually to end up */
254 &dst,
255 &dst_tmp /* The temporary file we write to */);
9f1c1940
ZJS		 256 if (r < 0)
257 return r;
1b992147 258
f5fbe71d 259 r = copy_bytes(src, fileno(dst), UINT64_MAX, COPY_REFLINK);
1b992147 260 if (r < 0)
62c03398 261 return r;
9f1c1940 262
63c372cb 263 backup = strjoina(x, "-");
9f1c1940 264
62c03398
LP		 265 /* Copy over the access mask. Don't fail on chmod() or chown(). If it stays owned by us and/or
266 * unreadable by others, then it isn't too bad... */
267 r = fchmod_and_chown(fileno(dst), st.st_mode & 07777, st.st_uid, st.st_gid);
c039af23
YW		 268 if (r < 0)
269 log_warning_errno(r, "Failed to change access mode or ownership of %s: %m", backup);
1b992147 270
62c03398 271 if (futimens(fileno(dst), (const struct timespec[2]) { st.st_atim, st.st_mtim }) < 0)
56f64d95 272 log_warning_errno(errno, "Failed to fix access and modification time of %s: %m", backup);
1b992147 273
62c03398 274 r = fsync_full(fileno(dst));
0675e94a 275 if (r < 0)
62c03398 276 return r;
0675e94a 277
62c03398
LP		 278 if (rename(dst_tmp, backup) < 0)
279 return errno;
1b992147 280
62c03398 281 dst_tmp = mfree(dst_tmp); /* disable the unlink_and_freep() hook now that the file has been renamed*/
1b992147 282 return 0;
1b992147
LP		 283}
284
a12b0cc3
LP		 285static int putgrent_with_members(const struct group *gr, FILE *group) {
286 char **a;
287
288 assert(gr);
289 assert(group);
290
5bc9c980 291 a = ordered_hashmap_get(members, gr->gr_name);
a12b0cc3
LP		 292 if (a) {
293 _cleanup_strv_free_ char **l = NULL;
294 bool added = false;
295 char **i;
296
297 l = strv_copy(gr->gr_mem);
298 if (!l)
299 return -ENOMEM;
300
301 STRV_FOREACH(i, a) {
302 if (strv_find(l, *i))
303 continue;
304
305 if (strv_extend(&l, *i) < 0)
306 return -ENOMEM;
307
308 added = true;
309 }
310
311 if (added) {
312 struct group t;
100d5f6e 313 int r;
a12b0cc3
LP		 314
315 strv_uniq(l);
316 strv_sort(l);
317
318 t = *gr;
319 t.gr_mem = l;
320
100d5f6e
FB		 321 r = putgrent_sane(&t, group);
322 return r < 0 ? r : 1;
a12b0cc3
LP		 323 }
324 }
325
100d5f6e 326 return putgrent_sane(gr, group);
a12b0cc3
LP		 327}
328
349cc4a5 329#if ENABLE_GSHADOW
9ab315cc
LP		 330static int putsgent_with_members(const struct sgrp *sg, FILE *gshadow) {
331 char **a;
332
333 assert(sg);
334 assert(gshadow);
335
5bc9c980 336 a = ordered_hashmap_get(members, sg->sg_namp);
9ab315cc
LP		 337 if (a) {
338 _cleanup_strv_free_ char **l = NULL;
339 bool added = false;
340 char **i;
341
342 l = strv_copy(sg->sg_mem);
343 if (!l)
344 return -ENOMEM;
345
346 STRV_FOREACH(i, a) {
347 if (strv_find(l, *i))
348 continue;
349
350 if (strv_extend(&l, *i) < 0)
351 return -ENOMEM;
352
353 added = true;
354 }
355
356 if (added) {
357 struct sgrp t;
100d5f6e 358 int r;
9ab315cc
LP		 359
360 strv_uniq(l);
361 strv_sort(l);
362
363 t = *sg;
364 t.sg_mem = l;
365
100d5f6e
FB		 366 r = putsgent_sane(&t, gshadow);
367 return r < 0 ? r : 1;
9ab315cc
LP		 368 }
369 }
370
100d5f6e 371 return putsgent_sane(sg, gshadow);
9ab315cc 372}
b14e1b43 373#endif
9ab315cc 374
7b1aaf66 375static const char* default_shell(uid_t uid) {
6db90462 376 return uid == 0 ? "/bin/sh" : NOLOGIN;
7b1aaf66
ZJS		 377}
378
b20b0b66
FB		 379static int write_temporary_passwd(const char *passwd_path, FILE **tmpfile, char **tmpfile_path) {
380 _cleanup_fclose_ FILE *original = NULL, *passwd = NULL;
1dd98a71 381 _cleanup_(unlink_and_freep) char *passwd_tmp = NULL;
563dc6f8 382 struct passwd *pw = NULL;
1b992147
LP		 383 Item *i;
384 int r;
385
5bc9c980 386 if (ordered_hashmap_size(todo_uids) == 0)
b20b0b66 387 return 0;
1b992147 388
b20b0b66
FB		 389 r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp);
390 if (r < 0)
391 return r;
392
393 original = fopen(passwd_path, "re");
394 if (original) {
b20b0b66 395
90c81688 396 r = sync_rights(fileno(original), fileno(passwd));
1b992147 397 if (r < 0)
1dd98a71 398 return r;
1b992147 399
100d5f6e 400 while ((r = fgetpwent_sane(original, &pw)) > 0) {
1b992147 401
5bc9c980 402 i = ordered_hashmap_get(users, pw->pw_name);
330d1def
ZJS		 403 if (i && i->todo_user)
404 return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
405 "%s: User \"%s\" already exists.",
406 passwd_path, pw->pw_name);
e3c72c21 407
330d1def
ZJS		 408 if (ordered_hashmap_contains(todo_uids, UID_TO_PTR(pw->pw_uid)))
409 return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
410 "%s: Detected collision for UID " UID_FMT ".",
411 passwd_path, pw->pw_uid);
b20b0b66 412
563dc6f8
FB		 413 /* Make sure we keep the NIS entries (if any) at the end. */
414 if (IN_SET(pw->pw_name[0], '+', '-'))
415 break;
416
100d5f6e
FB		 417 r = putpwent_sane(pw, passwd);
418 if (r < 0)
419 return r;
b20b0b66 420 }
100d5f6e
FB		 421 if (r < 0)
422 return r;
1dd98a71
FB		 423
424 } else {
425 if (errno != ENOENT)
426 return -errno;
427 if (fchmod(fileno(passwd), 0644) < 0)
428 return -errno;
b20b0b66
FB		 429 }
430
90e74a66 431 ORDERED_HASHMAP_FOREACH(i, todo_uids) {
b20b0b66
FB		 432 struct passwd n = {
433 .pw_name = i->name,
434 .pw_uid = i->uid,
435 .pw_gid = i->gid,
436 .pw_gecos = i->description,
1b992147 437
b20b0b66
FB		 438 /* "x" means the password is stored in the shadow file */
439 .pw_passwd = (char*) "x",
a12b0cc3 440
b20b0b66 441 /* We default to the root directory as home */
636e72bc 442 .pw_dir = i->home ?: (char*) "/",
1b992147 443
b20b0b66
FB		 444 /* Initialize the shell to nologin, with one exception:
445 * for root we patch in something special */
7b1aaf66 446 .pw_shell = i->shell ?: (char*) default_shell(i->uid),
b20b0b66 447 };
9ab315cc 448
100d5f6e
FB		 449 r = putpwent_sane(&n, passwd);
450 if (r < 0)
451 return r;
b20b0b66
FB		 452 }
453
563dc6f8
FB		 454 /* Append the remaining NIS entries if any */
455 while (pw) {
100d5f6e
FB		 456 r = putpwent_sane(pw, passwd);
457 if (r < 0)
458 return r;
563dc6f8 459
100d5f6e
FB		 460 r = fgetpwent_sane(original, &pw);
461 if (r < 0)
462 return r;
463 if (r == 0)
464 break;
563dc6f8 465 }
563dc6f8 466
b20b0b66
FB		 467 r = fflush_and_check(passwd);
468 if (r < 0)
1dd98a71 469 return r;
b20b0b66 470
1cc6c93a
YW		 471 *tmpfile = TAKE_PTR(passwd);
472 *tmpfile_path = TAKE_PTR(passwd_tmp);
473
b20b0b66 474 return 0;
b20b0b66
FB		 475}
476
477static int write_temporary_shadow(const char *shadow_path, FILE **tmpfile, char **tmpfile_path) {
478 _cleanup_fclose_ FILE *original = NULL, *shadow = NULL;
1dd98a71 479 _cleanup_(unlink_and_freep) char *shadow_tmp = NULL;
19ec7de2 480 struct spwd *sp = NULL;
b20b0b66
FB		 481 long lstchg;
482 Item *i;
483 int r;
484
5bc9c980 485 if (ordered_hashmap_size(todo_uids) == 0)
b20b0b66
FB		 486 return 0;
487
488 r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp);
489 if (r < 0)
490 return r;
9ab315cc 491
b20b0b66
FB		 492 lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY);
493
494 original = fopen(shadow_path, "re");
495 if (original) {
b20b0b66 496
90c81688 497 r = sync_rights(fileno(original), fileno(shadow));
9ab315cc 498 if (r < 0)
1dd98a71 499 return r;
9ab315cc 500
100d5f6e 501 while ((r = fgetspent_sane(original, &sp)) > 0) {
9ab315cc 502
5bc9c980 503 i = ordered_hashmap_get(users, sp->sp_namp);
b20b0b66
FB		 504 if (i && i->todo_user) {
505 /* we will update the existing entry */
506 sp->sp_lstchg = lstchg;
e3c72c21 507
b20b0b66
FB		 508 /* only the /etc/shadow stage is left, so we can
509 * safely remove the item from the todo set */
510 i->todo_user = false;
5bc9c980 511 ordered_hashmap_remove(todo_uids, UID_TO_PTR(i->uid));
9ab315cc 512 }
b20b0b66 513
19ec7de2
FB		 514 /* Make sure we keep the NIS entries (if any) at the end. */
515 if (IN_SET(sp->sp_namp[0], '+', '-'))
516 break;
517
100d5f6e
FB		 518 r = putspent_sane(sp, shadow);
519 if (r < 0)
520 return r;
b20b0b66 521 }
100d5f6e
FB		 522 if (r < 0)
523 return r;
1dd98a71
FB		 524
525 } else {
526 if (errno != ENOENT)
527 return -errno;
528 if (fchmod(fileno(shadow), 0000) < 0)
529 return -errno;
b20b0b66 530 }
9ab315cc 531
90e74a66 532 ORDERED_HASHMAP_FOREACH(i, todo_uids) {
b20b0b66
FB		 533 struct spwd n = {
534 .sp_namp = i->name,
fc58c0c7 535 .sp_pwdp = (char*) "!*", /* lock this password, and make it invalid */
b20b0b66
FB		 536 .sp_lstchg = lstchg,
537 .sp_min = -1,
538 .sp_max = -1,
539 .sp_warn = -1,
540 .sp_inact = -1,
12c82937 541 .sp_expire = -1,
f5fbe71d 542 .sp_flag = ULONG_MAX, /* this appears to be what everybody does ... */
b20b0b66 543 };
9ab315cc 544
100d5f6e
FB		 545 r = putspent_sane(&n, shadow);
546 if (r < 0)
547 return r;
1b992147 548 }
19ec7de2
FB		 549
550 /* Append the remaining NIS entries if any */
551 while (sp) {
100d5f6e
FB		 552 r = putspent_sane(sp, shadow);
553 if (r < 0)
554 return r;
19ec7de2 555
100d5f6e
FB		 556 r = fgetspent_sane(original, &sp);
557 if (r < 0)
558 return r;
559 if (r == 0)
560 break;
19ec7de2
FB		 561 }
562 if (!IN_SET(errno, 0, ENOENT))
563 return -errno;
1b992147 564
0675e94a 565 r = fflush_sync_and_check(shadow);
b20b0b66 566 if (r < 0)
1dd98a71 567 return r;
b20b0b66 568
1cc6c93a
YW		 569 *tmpfile = TAKE_PTR(shadow);
570 *tmpfile_path = TAKE_PTR(shadow_tmp);
571
b20b0b66 572 return 0;
b20b0b66 573}
1b992147 574
b20b0b66
FB		 575static int write_temporary_group(const char *group_path, FILE **tmpfile, char **tmpfile_path) {
576 _cleanup_fclose_ FILE *original = NULL, *group = NULL;
1dd98a71 577 _cleanup_(unlink_and_freep) char *group_tmp = NULL;
b20b0b66 578 bool group_changed = false;
563dc6f8 579 struct group *gr = NULL;
b20b0b66
FB		 580 Item *i;
581 int r;
1b992147 582
5bc9c980 583 if (ordered_hashmap_size(todo_gids) == 0 && ordered_hashmap_size(members) == 0)
b20b0b66 584 return 0;
e3c72c21 585
b20b0b66
FB		 586 r = fopen_temporary_label("/etc/group", group_path, &group, &group_tmp);
587 if (r < 0)
588 return r;
589
590 original = fopen(group_path, "re");
591 if (original) {
b20b0b66 592
90c81688 593 r = sync_rights(fileno(original), fileno(group));
b20b0b66 594 if (r < 0)
1dd98a71 595 return r;
b20b0b66 596
100d5f6e 597 while ((r = fgetgrent_sane(original, &gr)) > 0) {
b20b0b66
FB		 598 /* Safety checks against name and GID collisions. Normally,
599 * this should be unnecessary, but given that we look at the
600 * entries anyway here, let's make an extra verification
601 * step that we don't generate duplicate entries. */
602
5bc9c980 603 i = ordered_hashmap_get(groups, gr->gr_name);
330d1def
ZJS		 604 if (i && i->todo_group)
605 return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
606 "%s: Group \"%s\" already exists.",
607 group_path, gr->gr_name);
b20b0b66 608
330d1def
ZJS		 609 if (ordered_hashmap_contains(todo_gids, GID_TO_PTR(gr->gr_gid)))
610 return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
611 "%s: Detected collision for GID " GID_FMT ".",
612 group_path, gr->gr_gid);
1b992147 613
563dc6f8
FB		 614 /* Make sure we keep the NIS entries (if any) at the end. */
615 if (IN_SET(gr->gr_name[0], '+', '-'))
616 break;
617
b20b0b66
FB		 618 r = putgrent_with_members(gr, group);
619 if (r < 0)
1dd98a71 620 return r;
b20b0b66
FB		 621 if (r > 0)
622 group_changed = true;
b20b0b66 623 }
100d5f6e
FB		 624 if (r < 0)
625 return r;
1dd98a71
FB		 626
627 } else {
628 if (errno != ENOENT)
629 return -errno;
630 if (fchmod(fileno(group), 0644) < 0)
631 return -errno;
b20b0b66 632 }
7629889c 633
90e74a66 634 ORDERED_HASHMAP_FOREACH(i, todo_gids) {
b20b0b66
FB		 635 struct group n = {
636 .gr_name = i->name,
637 .gr_gid = i->gid,
638 .gr_passwd = (char*) "x",
639 };
1b992147 640
b20b0b66
FB		 641 r = putgrent_with_members(&n, group);
642 if (r < 0)
1dd98a71 643 return r;
7629889c 644
b20b0b66
FB		 645 group_changed = true;
646 }
1b992147 647
563dc6f8
FB		 648 /* Append the remaining NIS entries if any */
649 while (gr) {
100d5f6e
FB		 650 r = putgrent_sane(gr, group);
651 if (r < 0)
652 return r;
563dc6f8 653
100d5f6e
FB		 654 r = fgetgrent_sane(original, &gr);
655 if (r < 0)
656 return r;
657 if (r == 0)
658 break;
563dc6f8 659 }
563dc6f8 660
0675e94a 661 r = fflush_sync_and_check(group);
b20b0b66 662 if (r < 0)
1dd98a71 663 return r;
1b992147 664
b20b0b66 665 if (group_changed) {
1cc6c93a
YW		 666 *tmpfile = TAKE_PTR(group);
667 *tmpfile_path = TAKE_PTR(group_tmp);
b20b0b66
FB		 668 }
669 return 0;
b20b0b66
FB		 670}
671
672static int write_temporary_gshadow(const char * gshadow_path, FILE **tmpfile, char **tmpfile_path) {
349cc4a5 673#if ENABLE_GSHADOW
b20b0b66 674 _cleanup_fclose_ FILE *original = NULL, *gshadow = NULL;
1dd98a71 675 _cleanup_(unlink_and_freep) char *gshadow_tmp = NULL;
b20b0b66 676 bool group_changed = false;
b20b0b66
FB		 677 Item *i;
678 int r;
679
5bc9c980 680 if (ordered_hashmap_size(todo_gids) == 0 && ordered_hashmap_size(members) == 0)
b20b0b66
FB		 681 return 0;
682
683 r = fopen_temporary_label("/etc/gshadow", gshadow_path, &gshadow, &gshadow_tmp);
684 if (r < 0)
685 return r;
9ab315cc 686
b20b0b66
FB		 687 original = fopen(gshadow_path, "re");
688 if (original) {
689 struct sgrp *sg;
690
90c81688 691 r = sync_rights(fileno(original), fileno(gshadow));
1b992147 692 if (r < 0)
1dd98a71 693 return r;
9ab315cc 694
100d5f6e 695 while ((r = fgetsgent_sane(original, &sg)) > 0) {
c5abf225 696
5bc9c980 697 i = ordered_hashmap_get(groups, sg->sg_namp);
330d1def
ZJS		 698 if (i && i->todo_group)
699 return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
700 "%s: Group \"%s\" already exists.",
701 gshadow_path, sg->sg_namp);
9ab315cc 702
b20b0b66 703 r = putsgent_with_members(sg, gshadow);
fff19499 704 if (r < 0)
1dd98a71 705 return r;
b20b0b66
FB		 706 if (r > 0)
707 group_changed = true;
b20b0b66 708 }
100d5f6e
FB		 709 if (r < 0)
710 return r;
1dd98a71
FB		 711
712 } else {
713 if (errno != ENOENT)
714 return -errno;
715 if (fchmod(fileno(gshadow), 0000) < 0)
716 return -errno;
b20b0b66 717 }
9ab315cc 718
90e74a66 719 ORDERED_HASHMAP_FOREACH(i, todo_gids) {
b20b0b66
FB		 720 struct sgrp n = {
721 .sg_namp = i->name,
bbbfe49b 722 .sg_passwd = (char*) "!*",
b20b0b66 723 };
9ab315cc 724
b20b0b66 725 r = putsgent_with_members(&n, gshadow);
9ab315cc 726 if (r < 0)
1dd98a71 727 return r;
b20b0b66
FB		 728
729 group_changed = true;
9ab315cc
LP		 730 }
731
0675e94a 732 r = fflush_sync_and_check(gshadow);
b20b0b66 733 if (r < 0)
1dd98a71 734 return r;
b20b0b66 735
9ab315cc 736 if (group_changed) {
1cc6c93a
YW		 737 *tmpfile = TAKE_PTR(gshadow);
738 *tmpfile_path = TAKE_PTR(gshadow_tmp);
b20b0b66
FB		 739 }
740 return 0;
b14e1b43
FB		 741#else
742 return 0;
743#endif
b20b0b66
FB		 744}
745
746static int write_files(void) {
b20b0b66 747 _cleanup_fclose_ FILE *passwd = NULL, *group = NULL, *shadow = NULL, *gshadow = NULL;
1dd98a71 748 _cleanup_(unlink_and_freep) char *passwd_tmp = NULL, *group_tmp = NULL, *shadow_tmp = NULL, *gshadow_tmp = NULL;
b20b0b66
FB		 749 const char *passwd_path = NULL, *group_path = NULL, *shadow_path = NULL, *gshadow_path = NULL;
750 int r;
751
752 passwd_path = prefix_roota(arg_root, "/etc/passwd");
753 shadow_path = prefix_roota(arg_root, "/etc/shadow");
754 group_path = prefix_roota(arg_root, "/etc/group");
755 gshadow_path = prefix_roota(arg_root, "/etc/gshadow");
756
757 r = write_temporary_group(group_path, &group, &group_tmp);
758 if (r < 0)
1dd98a71 759 return r;
b20b0b66
FB		 760
761 r = write_temporary_gshadow(gshadow_path, &gshadow, &gshadow_tmp);
762 if (r < 0)
1dd98a71 763 return r;
b20b0b66
FB		 764
765 r = write_temporary_passwd(passwd_path, &passwd, &passwd_tmp);
766 if (r < 0)
1dd98a71 767 return r;
b20b0b66
FB		 768
769 r = write_temporary_shadow(shadow_path, &shadow, &shadow_tmp);
770 if (r < 0)
1dd98a71 771 return r;
b20b0b66
FB		 772
773 /* Make a backup of the old files */
774 if (group) {
775 r = make_backup("/etc/group", group_path);
776 if (r < 0)
1dd98a71 777 return r;
b20b0b66
FB		 778 }
779 if (gshadow) {
780 r = make_backup("/etc/gshadow", gshadow_path);
781 if (r < 0)
1dd98a71 782 return r;
1b992147
LP		 783 }
784
785 if (passwd) {
9f1c1940 786 r = make_backup("/etc/passwd", passwd_path);
1b992147 787 if (r < 0)
1dd98a71 788 return r;
1b992147 789 }
9ab315cc
LP		 790 if (shadow) {
791 r = make_backup("/etc/shadow", shadow_path);
792 if (r < 0)
1dd98a71 793 return r;
9ab315cc 794 }
1b992147
LP		 795
796 /* And make the new files count */
b20b0b66 797 if (group) {
2da3dc69 798 r = rename_and_apply_smack_floor_label(group_tmp, group_path);
b20b0b66 799 if (r < 0)
1dd98a71 800 return r;
9ab315cc 801
b20b0b66 802 group_tmp = mfree(group_tmp);
d481b830
FB		 803
804 if (!arg_root && !arg_image)
805 (void) nscd_flush_cache(STRV_MAKE("group"));
b20b0b66
FB		 806 }
807 if (gshadow) {
2da3dc69 808 r = rename_and_apply_smack_floor_label(gshadow_tmp, gshadow_path);
b20b0b66 809 if (r < 0)
1dd98a71 810 return r;
1b992147 811
b20b0b66 812 gshadow_tmp = mfree(gshadow_tmp);
1b992147
LP		 813 }
814
815 if (passwd) {
2da3dc69 816 r = rename_and_apply_smack_floor_label(passwd_tmp, passwd_path);
c02e7b1e 817 if (r < 0)
1dd98a71 818 return r;
1b992147 819
97b11eed 820 passwd_tmp = mfree(passwd_tmp);
d481b830
FB		 821
822 if (!arg_root && !arg_image)
823 (void) nscd_flush_cache(STRV_MAKE("passwd"));
1b992147 824 }
9ab315cc 825 if (shadow) {
2da3dc69 826 r = rename_and_apply_smack_floor_label(shadow_tmp, shadow_path);
c02e7b1e 827 if (r < 0)
1dd98a71 828 return r;
9ab315cc 829
97b11eed 830 shadow_tmp = mfree(shadow_tmp);
9ab315cc 831 }
1b992147 832
1dd98a71 833 return 0;
1b992147
LP		 834}
835
b9ee05c2 836static int uid_is_ok(uid_t uid, const char *name, bool check_with_gid) {
1b992147
LP		 837 struct passwd *p;
838 struct group *g;
839 const char *n;
840 Item *i;
841
842 /* Let's see if we already have assigned the UID a second time */
5bc9c980 843 if (ordered_hashmap_get(todo_uids, UID_TO_PTR(uid)))
1b992147
LP		 844 return 0;
845
846 /* Try to avoid using uids that are already used by a group
847 * that doesn't have the same name as our new user. */
b9ee05c2
MV		 848 if (check_with_gid) {
849 i = ordered_hashmap_get(todo_gids, GID_TO_PTR(uid));
850 if (i && !streq(i->name, name))
851 return 0;
852 }
1b992147
LP		 853
854 /* Let's check the files directly */
71da1673 855 if (hashmap_contains(database_by_uid, UID_TO_PTR(uid)))
1b992147
LP		 856 return 0;
857
b9ee05c2 858 if (check_with_gid) {
71da1673 859 n = hashmap_get(database_by_gid, GID_TO_PTR(uid));
b9ee05c2
MV		 860 if (n && !streq(n, name))
861 return 0;
862 }
1b992147
LP		 863
864 /* Let's also check via NSS, to avoid UID clashes over LDAP and such, just in case */
865 if (!arg_root) {
866 errno = 0;
867 p = getpwuid(uid);
868 if (p)
869 return 0;
b0284aba 870 if (!IN_SET(errno, 0, ENOENT))
1b992147
LP		 871 return -errno;
872
b9ee05c2
MV		 873 if (check_with_gid) {
874 errno = 0;
875 g = getgrgid((gid_t) uid);
876 if (g) {
877 if (!streq(g->gr_name, name))
878 return 0;
879 } else if (!IN_SET(errno, 0, ENOENT))
880 return -errno;
881 }
1b992147
LP		 882 }
883
884 return 1;
885}
886
887static int root_stat(const char *p, struct stat *st) {
888 const char *fix;
889
1d13f648 890 fix = prefix_roota(arg_root, p);
1b992147
LP		 891 if (stat(fix, st) < 0)
892 return -errno;
893
894 return 0;
895}
896
897static int read_id_from_file(Item *i, uid_t *_uid, gid_t *_gid) {
898 struct stat st;
899 bool found_uid = false, found_gid = false;
56d21cde
PDS		 900 uid_t uid = 0;
901 gid_t gid = 0;
1b992147
LP		 902
903 assert(i);
904
905 /* First, try to get the gid directly */
906 if (_gid && i->gid_path && root_stat(i->gid_path, &st) >= 0) {
907 gid = st.st_gid;
908 found_gid = true;
909 }
910
911 /* Then, try to get the uid directly */
912 if ((_uid || (_gid && !found_gid))
913 && i->uid_path
914 && root_stat(i->uid_path, &st) >= 0) {
915
916 uid = st.st_uid;
917 found_uid = true;
918
919 /* If we need the gid, but had no success yet, also derive it from the uid path */
920 if (_gid && !found_gid) {
921 gid = st.st_gid;
922 found_gid = true;
923 }
924 }
925
926 /* If that didn't work yet, then let's reuse the gid as uid */
927 if (_uid && !found_uid && i->gid_path) {
928
929 if (found_gid) {
930 uid = (uid_t) gid;
931 found_uid = true;
932 } else if (root_stat(i->gid_path, &st) >= 0) {
933 uid = (uid_t) st.st_gid;
934 found_uid = true;
935 }
936 }
937
938 if (_uid) {
939 if (!found_uid)
940 return 0;
941
942 *_uid = uid;
943 }
944
945 if (_gid) {
946 if (!found_gid)
947 return 0;
948
949 *_gid = gid;
950 }
951
952 return 1;
953}
954
955static int add_user(Item *i) {
956 void *z;
957 int r;
958
959 assert(i);
960
961 /* Check the database directly */
71da1673 962 z = hashmap_get(database_by_username, i->name);
1b992147
LP		 963 if (z) {
964 log_debug("User %s already exists.", i->name);
c1b6b04f 965 i->uid = PTR_TO_UID(z);
1b992147
LP		 966 i->uid_set = true;
967 return 0;
968 }
969
970 if (!arg_root) {
971 struct passwd *p;
1b992147
LP		 972
973 /* Also check NSS */
974 errno = 0;
975 p = getpwnam(i->name);
976 if (p) {
977 log_debug("User %s already exists.", i->name);
978 i->uid = p->pw_uid;
979 i->uid_set = true;
980
2fc09a9c
DM		 981 r = free_and_strdup(&i->description, p->pw_gecos);
982 if (r < 0)
983 return log_oom();
984
1b992147
LP		 985 return 0;
986 }
08c7c321 987 if (!errno_is_not_exists(errno))
4a62c710 988 return log_error_errno(errno, "Failed to check if user %s already exists: %m", i->name);
1b992147
LP		 989 }
990
991 /* Try to use the suggested numeric uid */
992 if (i->uid_set) {
b9ee05c2 993 r = uid_is_ok(i->uid, i->name, !i->id_set_strict);
f647962d
MS		 994 if (r < 0)
995 return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
1b992147
LP		 996 if (r == 0) {
997 log_debug("Suggested user ID " UID_FMT " for %s already used.", i->uid, i->name);
998 i->uid_set = false;
999 }
1000 }
1001
1002 /* If that didn't work, try to read it from the specified path */
1003 if (!i->uid_set) {
1004 uid_t c;
1005
1006 if (read_id_from_file(i, &c, NULL) > 0) {
1007
8530dc44 1008 if (c <= 0 || !uid_range_contains(uid_range, n_uid_range, c))
1b992147
LP		 1009 log_debug("User ID " UID_FMT " of file not suitable for %s.", c, i->name);
1010 else {
b9ee05c2 1011 r = uid_is_ok(c, i->name, true);
f647962d
MS		 1012 if (r < 0)
1013 return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
1014 else if (r > 0) {
1b992147
LP		 1015 i->uid = c;
1016 i->uid_set = true;
1017 } else
1018 log_debug("User ID " UID_FMT " of file for %s is already used.", c, i->name);
1019 }
1020 }
1021 }
1022
b938cb90 1023 /* Otherwise, try to reuse the group ID */
1b992147 1024 if (!i->uid_set && i->gid_set) {
b9ee05c2 1025 r = uid_is_ok((uid_t) i->gid, i->name, true);
f647962d
MS		 1026 if (r < 0)
1027 return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
1b992147
LP		 1028 if (r > 0) {
1029 i->uid = (uid_t) i->gid;
1030 i->uid_set = true;
1031 }
1032 }
1033
1034 /* And if that didn't work either, let's try to find a free one */
1035 if (!i->uid_set) {
4b6f9b20
ZJS		 1036 maybe_emit_login_defs_warning();
1037
8530dc44
LP		 1038 for (;;) {
1039 r = uid_range_next_lower(uid_range, n_uid_range, &search_uid);
330d1def
ZJS		 1040 if (r < 0)
1041 return log_error_errno(r, "No free user ID available for %s.", i->name);
1b992147 1042
b9ee05c2 1043 r = uid_is_ok(search_uid, i->name, true);
f647962d
MS		 1044 if (r < 0)
1045 return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
1046 else if (r > 0)
1b992147
LP		 1047 break;
1048 }
1049
1b992147
LP		 1050 i->uid_set = true;
1051 i->uid = search_uid;
1b992147
LP		 1052 }
1053
1dfb9321
SS		 1054 r = ordered_hashmap_ensure_put(&todo_uids, NULL, UID_TO_PTR(i->uid), i);
1055 if (r == -EEXIST)
1056 return log_error_errno(r, "Requested user %s with uid " UID_FMT " and gid" GID_FMT " to be created is duplicated "
1057 "or conflicts with another user.", i->name, i->uid, i->gid);
1058 if (r == -ENOMEM)
1b992147 1059 return log_oom();
1b992147 1060 if (r < 0)
1dfb9321
SS		 1061 return log_error_errno(r, "Failed to store user %s with uid " UID_FMT " and gid " GID_FMT " to be created: %m",
1062 i->name, i->uid, i->gid);
1b992147 1063
c1b6b04f 1064 i->todo_user = true;
1b992147
LP		 1065 log_info("Creating user %s (%s) with uid " UID_FMT " and gid " GID_FMT ".", i->name, strna(i->description), i->uid, i->gid);
1066
1067 return 0;
1068}
1069
1070static int gid_is_ok(gid_t gid) {
1071 struct group *g;
1072 struct passwd *p;
1073
5bc9c980 1074 if (ordered_hashmap_get(todo_gids, GID_TO_PTR(gid)))
1b992147
LP		 1075 return 0;
1076
1077 /* Avoid reusing gids that are already used by a different user */
5bc9c980 1078 if (ordered_hashmap_get(todo_uids, UID_TO_PTR(gid)))
1b992147
LP		 1079 return 0;
1080
71da1673 1081 if (hashmap_contains(database_by_gid, GID_TO_PTR(gid)))
1b992147
LP		 1082 return 0;
1083
71da1673 1084 if (hashmap_contains(database_by_uid, UID_TO_PTR(gid)))
1b992147
LP		 1085 return 0;
1086
1087 if (!arg_root) {
1088 errno = 0;
1089 g = getgrgid(gid);
1090 if (g)
1091 return 0;
b0284aba 1092 if (!IN_SET(errno, 0, ENOENT))
1b992147
LP		 1093 return -errno;
1094
1095 errno = 0;
1096 p = getpwuid((uid_t) gid);
1097 if (p)
1098 return 0;
b0284aba 1099 if (!IN_SET(errno, 0, ENOENT))
1b992147
LP		 1100 return -errno;
1101 }
1102
1103 return 1;
1104}
1105
649916d3 1106static int get_gid_by_name(const char *name, gid_t *gid) {
1b992147 1107 void *z;
1b992147 1108
649916d3 1109 assert(gid);
1b992147
LP		 1110
1111 /* Check the database directly */
649916d3 1112 z = hashmap_get(database_by_groupname, name);
1b992147 1113 if (z) {
649916d3 1114 *gid = PTR_TO_GID(z);
1b992147
LP		 1115 return 0;
1116 }
1117
1118 /* Also check NSS */
1119 if (!arg_root) {
1120 struct group *g;
1121
1122 errno = 0;
649916d3 1123 g = getgrnam(name);
1b992147 1124 if (g) {
649916d3 1125 *gid = g->gr_gid;
1b992147
LP		 1126 return 0;
1127 }
08c7c321 1128 if (!errno_is_not_exists(errno))
649916d3
DM		 1129 return log_error_errno(errno, "Failed to check if group %s already exists: %m", name);
1130 }
1131
1132 return -ENOENT;
1133}
1134
1135static int add_group(Item *i) {
1136 int r;
1137
1138 assert(i);
1139
1140 r = get_gid_by_name(i->name, &i->gid);
1141 if (r != -ENOENT) {
1142 if (r < 0)
1143 return r;
1144 log_debug("Group %s already exists.", i->name);
1145 i->gid_set = true;
1146 return 0;
1b992147
LP		 1147 }
1148
1149 /* Try to use the suggested numeric gid */
1150 if (i->gid_set) {
1151 r = gid_is_ok(i->gid);
f647962d
MS		 1152 if (r < 0)
1153 return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
b9ee05c2 1154 if (i->id_set_strict) {
28e7fad7
MV		 1155 /* If we require the gid to already exist we can return here:
1156 * r > 0: means the gid does not exist -> fail
1157 * r == 0: means the gid exists -> nothing more to do.
1158 */
baaa35ad
ZJS		 1159 if (r > 0)
1160 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1161 "Failed to create %s: please create GID %d",
1162 i->name, i->gid);
28e7fad7
MV		 1163 if (r == 0)
1164 return 0;
1165 }
1b992147
LP		 1166 if (r == 0) {
1167 log_debug("Suggested group ID " GID_FMT " for %s already used.", i->gid, i->name);
1168 i->gid_set = false;
1169 }
1170 }
1171
1172 /* Try to reuse the numeric uid, if there's one */
1173 if (!i->gid_set && i->uid_set) {
1174 r = gid_is_ok((gid_t) i->uid);
f647962d
MS		 1175 if (r < 0)
1176 return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
1b992147
LP		 1177 if (r > 0) {
1178 i->gid = (gid_t) i->uid;
1179 i->gid_set = true;
1180 }
1181 }
1182
1183 /* If that didn't work, try to read it from the specified path */
1184 if (!i->gid_set) {
1185 gid_t c;
1186
1187 if (read_id_from_file(i, NULL, &c) > 0) {
1188
8530dc44 1189 if (c <= 0 || !uid_range_contains(uid_range, n_uid_range, c))
1b992147
LP		 1190 log_debug("Group ID " GID_FMT " of file not suitable for %s.", c, i->name);
1191 else {
1192 r = gid_is_ok(c);
f647962d
MS		 1193 if (r < 0)
1194 return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
1195 else if (r > 0) {
1b992147
LP		 1196 i->gid = c;
1197 i->gid_set = true;
1198 } else
1199 log_debug("Group ID " GID_FMT " of file for %s already used.", c, i->name);
1200 }
1201 }
1202 }
1203
1204 /* And if that didn't work either, let's try to find a free one */
1205 if (!i->gid_set) {
4b6f9b20
ZJS		 1206 maybe_emit_login_defs_warning();
1207
8530dc44
LP		 1208 for (;;) {
1209 /* We look for new GIDs in the UID pool! */
1210 r = uid_range_next_lower(uid_range, n_uid_range, &search_uid);
330d1def
ZJS		 1211 if (r < 0)
1212 return log_error_errno(r, "No free group ID available for %s.", i->name);
8530dc44
LP		 1213
1214 r = gid_is_ok(search_uid);
f647962d
MS		 1215 if (r < 0)
1216 return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
1217 else if (r > 0)
1b992147
LP		 1218 break;
1219 }
1220
1b992147 1221 i->gid_set = true;
8530dc44 1222 i->gid = search_uid;
1b992147
LP		 1223 }
1224
1dfb9321
SS		 1225 r = ordered_hashmap_ensure_put(&todo_gids, NULL, GID_TO_PTR(i->gid), i);
1226 if (r == -EEXIST)
1227 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);
1228 if (r == -ENOMEM)
1b992147 1229 return log_oom();
1b992147 1230 if (r < 0)
1dfb9321 1231 return log_error_errno(r, "Failed to store group %s with gid " GID_FMT " to be created: %m", i->name, i->gid);
1b992147 1232
c1b6b04f 1233 i->todo_group = true;
1b992147
LP		 1234 log_info("Creating group %s with gid " GID_FMT ".", i->name, i->gid);
1235
1236 return 0;
1237}
1238
1239static int process_item(Item *i) {
1240 int r;
1241
1242 assert(i);
1243
1244 switch (i->type) {
1245
b5327d0a
YW		 1246 case ADD_USER: {
1247 Item *j;
1248
649916d3 1249 j = ordered_hashmap_get(groups, i->group_name ?: i->name);
b5327d0a 1250 if (j && j->todo_group) {
649916d3 1251 /* When a group with the target name is already in queue,
b5327d0a
YW		 1252 * use the information about the group and do not create
1253 * duplicated group entry. */
1254 i->gid_set = j->gid_set;
1255 i->gid = j->gid;
1256 i->id_set_strict = true;
649916d3
DM		 1257 } else if (i->group_name) {
1258 /* When a group name was given instead of a GID and it's
1259 * not in queue, then it must already exist. */
1260 r = get_gid_by_name(i->group_name, &i->gid);
1261 if (r < 0)
1262 return log_error_errno(r, "Group %s not found.", i->group_name);
1263 i->gid_set = true;
1264 i->id_set_strict = true;
b5327d0a
YW		 1265 } else {
1266 r = add_group(i);
1267 if (r < 0)
1268 return r;
1269 }
1b992147
LP		 1270
1271 return add_user(i);
b5327d0a 1272 }
1b992147 1273
e2c2060f 1274 case ADD_GROUP:
1b992147 1275 return add_group(i);
1b992147 1276
a12b0cc3
LP		 1277 default:
1278 assert_not_reached("Unknown item type");
1279 }
1b992147
LP		 1280}
1281
71da1673 1282static Item* item_free(Item *i) {
1b992147 1283 if (!i)
71da1673 1284 return NULL;
1b992147
LP		 1285
1286 free(i->name);
649916d3 1287 free(i->group_name);
1b992147
LP		 1288 free(i->uid_path);
1289 free(i->gid_path);
1290 free(i->description);
d9b8ea54 1291 free(i->home);
7b1aaf66 1292 free(i->shell);
71da1673 1293 return mfree(i);
1b992147
LP		 1294}
1295
1296DEFINE_TRIVIAL_CLEANUP_FUNC(Item*, item_free);
71da1673 1297DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(item_hash_ops, char, string_hash_func, string_compare_func, Item, item_free);
1b992147 1298
a12b0cc3
LP		 1299static int add_implicit(void) {
1300 char *g, **l;
a12b0cc3
LP		 1301 int r;
1302
1303 /* Implicitly create additional users and groups, if they were listed in "m" lines */
90e74a66 1304 ORDERED_HASHMAP_FOREACH_KEY(l, g, members) {
a12b0cc3
LP		 1305 char **m;
1306
d4f0412d
YW		 1307 STRV_FOREACH(m, l)
1308 if (!ordered_hashmap_get(users, *m)) {
a12b0cc3
LP		 1309 _cleanup_(item_freep) Item *j = NULL;
1310
a12b0cc3
LP		 1311 j = new0(Item, 1);
1312 if (!j)
1313 return log_oom();
1314
1315 j->type = ADD_USER;
1316 j->name = strdup(*m);
1317 if (!j->name)
1318 return log_oom();
1319
f334deba
SS		 1320 r = ordered_hashmap_ensure_put(&users, &item_hash_ops, j->name, j);
1321 if (r == -ENOMEM)
a12b0cc3 1322 return log_oom();
f334deba
SS		 1323 if (r < 0)
1324 return log_error_errno(r, "Failed to add implicit user '%s': %m", j->name);
a12b0cc3
LP		 1325
1326 log_debug("Adding implicit user '%s' due to m line", j->name);
f334deba 1327 TAKE_PTR(j);
a12b0cc3 1328 }
d4f0412d
YW		 1329
1330 if (!(ordered_hashmap_get(users, g) ||
1331 ordered_hashmap_get(groups, g))) {
1332 _cleanup_(item_freep) Item *j = NULL;
1333
d4f0412d
YW		 1334 j = new0(Item, 1);
1335 if (!j)
1336 return log_oom();
1337
1338 j->type = ADD_GROUP;
1339 j->name = strdup(g);
1340 if (!j->name)
1341 return log_oom();
1342
f334deba
SS		 1343 r = ordered_hashmap_ensure_put(&groups, &item_hash_ops, j->name, j);
1344 if (r == -ENOMEM)
d4f0412d 1345 return log_oom();
f334deba
SS		 1346 if (r < 0)
1347 return log_error_errno(r, "Failed to add implicit group '%s': %m", j->name);
d4f0412d
YW		 1348
1349 log_debug("Adding implicit group '%s' due to m line", j->name);
f334deba 1350 TAKE_PTR(j);
a12b0cc3
LP		 1351 }
1352 }
1353
1354 return 0;
1355}
1356
1b992147
LP		 1357static bool item_equal(Item *a, Item *b) {
1358 assert(a);
1359 assert(b);
1360
1361 if (a->type != b->type)
1362 return false;
1363
1364 if (!streq_ptr(a->name, b->name))
1365 return false;
1366
1367 if (!streq_ptr(a->uid_path, b->uid_path))
1368 return false;
1369
1370 if (!streq_ptr(a->gid_path, b->gid_path))
1371 return false;
1372
1373 if (!streq_ptr(a->description, b->description))
1374 return false;
1375
1376 if (a->uid_set != b->uid_set)
1377 return false;
1378
1379 if (a->uid_set && a->uid != b->uid)
1380 return false;
1381
1382 if (a->gid_set != b->gid_set)
1383 return false;
1384
1385 if (a->gid_set && a->gid != b->gid)
1386 return false;
1387
7629889c
LP		 1388 if (!streq_ptr(a->home, b->home))
1389 return false;
1390
7b1aaf66
ZJS		 1391 if (!streq_ptr(a->shell, b->shell))
1392 return false;
1393
1b992147
LP		 1394 return true;
1395}
1396
1b992147
LP		 1397static int parse_line(const char *fname, unsigned line, const char *buffer) {
1398
1399 static const Specifier specifier_table[] = {
2824aa07
LP		 1400 COMMON_SYSTEM_SPECIFIERS,
1401 COMMON_TMP_SPECIFIERS,
1b992147
LP		 1402 {}
1403 };
1404
7b1aaf66
ZJS		 1405 _cleanup_free_ char *action = NULL,
1406 *name = NULL, *resolved_name = NULL,
1407 *id = NULL, *resolved_id = NULL,
b8bed700
YW		 1408 *description = NULL, *resolved_description = NULL,
1409 *home = NULL, *resolved_home = NULL,
71fb1588 1410 *shell = NULL, *resolved_shell = NULL;
1b992147
LP		 1411 _cleanup_(item_freep) Item *i = NULL;
1412 Item *existing;
5bc9c980 1413 OrderedHashmap *h;
7629889c
LP		 1414 int r;
1415 const char *p;
1b992147
LP		 1416
1417 assert(fname);
1418 assert(line >= 1);
1419 assert(buffer);
1420
7629889c
LP		 1421 /* Parse columns */
1422 p = buffer;
4ec85141 1423 r = extract_many_words(&p, NULL, EXTRACT_UNQUOTE,
7b1aaf66 1424 &action, &name, &id, &description, &home, &shell, NULL);
330d1def
ZJS		 1425 if (r < 0)
1426 return log_error_errno(r, "[%s:%u] Syntax error.", fname, line);
1427 if (r < 2)
1428 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1429 "[%s:%u] Missing action and name columns.", fname, line);
1430 if (!isempty(p))
1431 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1432 "[%s:%u] Trailing garbage.", fname, line);
1b992147 1433
7629889c 1434 /* Verify action */
330d1def
ZJS		 1435 if (strlen(action) != 1)
1436 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1437 "[%s:%u] Unknown modifier '%s'", fname, line, action);
1b992147 1438
330d1def
ZJS		 1439 if (!IN_SET(action[0], ADD_USER, ADD_GROUP, ADD_MEMBER, ADD_RANGE))
1440 return log_error_errno(SYNTHETIC_ERRNO(EBADMSG),
1441 "[%s:%u] Unknown command type '%c'.", fname, line, action[0]);
1b992147 1442
7629889c 1443 /* Verify name */
e7b88b7b 1444 if (empty_or_dash(name))
97b11eed 1445 name = mfree(name);
1b992147 1446
8530dc44
LP		 1447 if (name) {
1448 r = specifier_printf(name, specifier_table, NULL, &resolved_name);
330d1def 1449 if (r < 0)
0f7e4b28 1450 return log_error_errno(r, "[%s:%u] Failed to replace specifiers in '%s': %m", fname, line, name);
8530dc44 1451
7a8867ab 1452 if (!valid_user_group_name(resolved_name, 0))
330d1def
ZJS		 1453 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1454 "[%s:%u] '%s' is not a valid user or group name.",
1455 fname, line, resolved_name);
1b992147
LP		 1456 }
1457
8530dc44 1458 /* Verify id */
e7b88b7b 1459 if (empty_or_dash(id))
97b11eed 1460 id = mfree(id);
7629889c 1461
8530dc44
LP		 1462 if (id) {
1463 r = specifier_printf(id, specifier_table, NULL, &resolved_id);
330d1def 1464 if (r < 0)
0f7e4b28 1465 return log_error_errno(r, "[%s:%u] Failed to replace specifiers in '%s': %m",
330d1def 1466 fname, line, name);
8530dc44
LP		 1467 }
1468
1469 /* Verify description */
e7b88b7b 1470 if (empty_or_dash(description))
97b11eed 1471 description = mfree(description);
1b992147 1472
8530dc44 1473 if (description) {
b8bed700 1474 r = specifier_printf(description, specifier_table, NULL, &resolved_description);
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, description);
b8bed700 1478
330d1def
ZJS		 1479 if (!valid_gecos(resolved_description))
1480 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1481 "[%s:%u] '%s' is not a valid GECOS field.",
1482 fname, line, resolved_description);
8530dc44
LP		 1483 }
1484
1485 /* Verify home */
e7b88b7b 1486 if (empty_or_dash(home))
97b11eed 1487 home = mfree(home);
1b992147 1488
8530dc44 1489 if (home) {
b8bed700 1490 r = specifier_printf(home, specifier_table, NULL, &resolved_home);
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, home);
b8bed700 1494
330d1def
ZJS		 1495 if (!valid_home(resolved_home))
1496 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1497 "[%s:%u] '%s' is not a valid home directory field.",
1498 fname, line, resolved_home);
8530dc44
LP		 1499 }
1500
7b1aaf66 1501 /* Verify shell */
e7b88b7b 1502 if (empty_or_dash(shell))
7b1aaf66
ZJS		 1503 shell = mfree(shell);
1504
1505 if (shell) {
1506 r = specifier_printf(shell, specifier_table, NULL, &resolved_shell);
330d1def 1507 if (r < 0)
0f7e4b28 1508 return log_error_errno(r, "[%s:%u] Failed to replace specifiers in '%s': %m",
330d1def 1509 fname, line, shell);
7b1aaf66 1510
330d1def
ZJS		 1511 if (!valid_shell(resolved_shell))
1512 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1513 "[%s:%u] '%s' is not a valid login shell field.",
1514 fname, line, resolved_shell);
7b1aaf66
ZJS		 1515 }
1516
a12b0cc3 1517 switch (action[0]) {
1b992147 1518
8530dc44 1519 case ADD_RANGE:
330d1def
ZJS		 1520 if (resolved_name)
1521 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1522 "[%s:%u] Lines of type 'r' don't take a name field.",
1523 fname, line);
1524
1525 if (!resolved_id)
1526 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1527 "[%s:%u] Lines of type 'r' require a ID range in the third field.",
1528 fname, line);
1529
1530 if (description || home || shell)
1531 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1532 "[%s:%u] Lines of type '%c' don't take a %s field.",
1533 fname, line, action[0],
1534 description ? "GECOS" : home ? "home directory" : "login shell");
7629889c 1535
8530dc44 1536 r = uid_range_add_str(&uid_range, &n_uid_range, resolved_id);
330d1def
ZJS		 1537 if (r < 0)
1538 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1539 "[%s:%u] Invalid UID range %s.", fname, line, resolved_id);
1b992147 1540
8530dc44
LP		 1541 return 0;
1542
1543 case ADD_MEMBER: {
8530dc44 1544 /* Try to extend an existing member or group item */
330d1def
ZJS		 1545 if (!name)
1546 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1547 "[%s:%u] Lines of type 'm' require a user name in the second field.",
1548 fname, line);
1549
1550 if (!resolved_id)
1551 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1552 "[%s:%u] Lines of type 'm' require a group name in the third field.",
1553 fname, line);
1554
7a8867ab 1555 if (!valid_user_group_name(resolved_id, 0))
330d1def
ZJS		 1556 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1557 "[%s:%u] '%s' is not a valid user or group name.",
1558 fname, line, resolved_id);
1559
1560 if (description || home || shell)
1561 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1562 "[%s:%u] Lines of type '%c' don't take a %s field.",
1563 fname, line, action[0],
1564 description ? "GECOS" : home ? "home directory" : "login shell");
8530dc44 1565
cde79109 1566 r = string_strv_ordered_hashmap_put(&members, resolved_id, resolved_name);
7629889c 1567 if (r < 0)
cde79109 1568 return log_error_errno(r, "Failed to store mapping for %s: %m", resolved_id);
a12b0cc3
LP		 1569
1570 return 0;
1b992147
LP		 1571 }
1572
a12b0cc3 1573 case ADD_USER:
330d1def
ZJS		 1574 if (!name)
1575 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1576 "[%s:%u] Lines of type 'u' require a user name in the second field.",
1577 fname, line);
8530dc44 1578
71da1673 1579 r = ordered_hashmap_ensure_allocated(&users, &item_hash_ops);
a12b0cc3
LP		 1580 if (r < 0)
1581 return log_oom();
1582
1583 i = new0(Item, 1);
1584 if (!i)
1585 return log_oom();
1586
8530dc44
LP		 1587 if (resolved_id) {
1588 if (path_is_absolute(resolved_id)) {
1cc6c93a 1589 i->uid_path = TAKE_PTR(resolved_id);
858d36c1 1590 path_simplify(i->uid_path, false);
a12b0cc3 1591 } else {
4cb41413
MV		 1592 _cleanup_free_ char *uid = NULL, *gid = NULL;
1593 if (split_pair(resolved_id, ":", &uid, &gid) == 0) {
1594 r = parse_gid(gid, &i->gid);
649916d3 1595 if (r < 0) {
7a8867ab 1596 if (valid_user_group_name(gid, 0))
649916d3
DM		 1597 i->group_name = TAKE_PTR(gid);
1598 else
1599 return log_error_errno(r, "Failed to parse GID: '%s': %m", id);
1600 } else {
1601 i->gid_set = true;
1602 i->id_set_strict = true;
1603 }
4cb41413 1604 free_and_replace(resolved_id, uid);
a12b0cc3 1605 }
1825c909
MV		 1606 if (!streq(resolved_id, "-")) {
1607 r = parse_uid(resolved_id, &i->uid);
1608 if (r < 0)
1609 return log_error_errno(r, "Failed to parse UID: '%s': %m", id);
1610 i->uid_set = true;
1611 }
a12b0cc3
LP		 1612 }
1613 }
1614
b8bed700
YW		 1615 i->description = TAKE_PTR(resolved_description);
1616 i->home = TAKE_PTR(resolved_home);
1cc6c93a 1617 i->shell = TAKE_PTR(resolved_shell);
7b1aaf66 1618
1b992147 1619 h = users;
a12b0cc3
LP		 1620 break;
1621
1622 case ADD_GROUP:
330d1def
ZJS		 1623 if (!name)
1624 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1625 "[%s:%u] Lines of type 'g' require a user name in the second field.",
1626 fname, line);
a12b0cc3 1627
330d1def
ZJS		 1628 if (description || home || shell)
1629 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1630 "[%s:%u] Lines of type '%c' don't take a %s field.",
1631 fname, line, action[0],
1632 description ? "GECOS" : home ? "home directory" : "login shell");
7629889c 1633
71da1673 1634 r = ordered_hashmap_ensure_allocated(&groups, &item_hash_ops);
7629889c
LP		 1635 if (r < 0)
1636 return log_oom();
1637
a12b0cc3
LP		 1638 i = new0(Item, 1);
1639 if (!i)
1640 return log_oom();
1641
8530dc44
LP		 1642 if (resolved_id) {
1643 if (path_is_absolute(resolved_id)) {
1cc6c93a 1644 i->gid_path = TAKE_PTR(resolved_id);
858d36c1 1645 path_simplify(i->gid_path, false);
a12b0cc3 1646 } else {
8530dc44 1647 r = parse_gid(resolved_id, &i->gid);
4cb41413
MV		 1648 if (r < 0)
1649 return log_error_errno(r, "Failed to parse GID: '%s': %m", id);
a12b0cc3
LP		 1650
1651 i->gid_set = true;
1652 }
1653 }
1654
1b992147 1655 h = groups;
a12b0cc3 1656 break;
8530dc44 1657
bce415ed
RC		 1658 default:
1659 return -EBADMSG;
1b992147 1660 }
a12b0cc3
LP		 1661
1662 i->type = action[0];
1cc6c93a 1663 i->name = TAKE_PTR(resolved_name);
1b992147 1664
5bc9c980 1665 existing = ordered_hashmap_get(h, i->name);
1b992147 1666 if (existing) {
1b992147
LP		 1667 /* Two identical items are fine */
1668 if (!item_equal(existing, i))
1669 log_warning("Two or more conflicting lines for %s configured, ignoring.", i->name);
1670
1671 return 0;
1672 }
1673
5bc9c980 1674 r = ordered_hashmap_put(h, i->name, i);
a12b0cc3
LP		 1675 if (r < 0)
1676 return log_oom();
1b992147
LP		 1677
1678 i = NULL;
1679 return 0;
1680}
1681
1682static int read_config_file(const char *fn, bool ignore_enoent) {
dfc87cbf
LP		 1683 _cleanup_fclose_ FILE *rf = NULL;
1684 FILE *f = NULL;
1b992147 1685 unsigned v = 0;
c4640902 1686 int r = 0;
1b992147
LP		 1687
1688 assert(fn);
1689
dfc87cbf
LP		 1690 if (streq(fn, "-"))
1691 f = stdin;
1692 else {
a826d4f7 1693 r = search_and_fopen(fn, "re", arg_root, (const char**) CONF_PATHS_STRV("sysusers.d"), &rf);
dfc87cbf
LP		 1694 if (r < 0) {
1695 if (ignore_enoent && r == -ENOENT)
1696 return 0;
1b992147 1697
8d3d7072 1698 return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn);
dfc87cbf
LP		 1699 }
1700
1701 f = rf;
1b992147
LP		 1702 }
1703
050ca299
LP		 1704 for (;;) {
1705 _cleanup_free_ char *line = NULL;
1b992147
LP		 1706 char *l;
1707 int k;
1708
050ca299
LP		 1709 k = read_line(f, LONG_LINE_MAX, &line);
1710 if (k < 0)
1711 return log_error_errno(k, "Failed to read '%s': %m", fn);
1712 if (k == 0)
1713 break;
1714
1b992147
LP		 1715 v++;
1716
1717 l = strstrip(line);
4c701096 1718 if (IN_SET(*l, 0, '#'))
1b992147
LP		 1719 continue;
1720
1721 k = parse_line(fn, v, l);
1722 if (k < 0 && r == 0)
1723 r = k;
1724 }
1725
1726 if (ferror(f)) {
56f64d95 1727 log_error_errno(errno, "Failed to read from file %s: %m", fn);
1b992147
LP		 1728 if (r == 0)
1729 r = -EIO;
1730 }
1731
1732 return r;
1733}
1734
ec0327d6
ZJS		 1735static int cat_config(void) {
1736 _cleanup_strv_free_ char **files = NULL;
ec0327d6
ZJS		 1737 int r;
1738
a826d4f7 1739 r = conf_files_list_with_replacement(arg_root, CONF_PATHS_STRV("sysusers.d"), arg_replace, &files, NULL);
ec0327d6
ZJS		 1740 if (r < 0)
1741 return r;
1742
0221d68a 1743 (void) pager_open(arg_pager_flags);
dcd5c891 1744
ec0327d6
ZJS		 1745 return cat_files(NULL, files, 0);
1746}
1747
37ec0fdd
LP		 1748static int help(void) {
1749 _cleanup_free_ char *link = NULL;
1750 int r;
1751
1752 r = terminal_urlify_man("systemd-sysusers.service", "8", &link);
1753 if (r < 0)
1754 return log_oom();
1755
1b992147
LP		 1756 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
1757 "Creates system user accounts.\n\n"
1758 " -h --help Show this help\n"
1759 " --version Show package version\n"
ec0327d6 1760 " --cat-config Show configuration files\n"
601185b4 1761 " --root=PATH Operate on an alternate filesystem root\n"
0c3ee127 1762 " --image=PATH Operate on disk image as filesystem root\n"
d16a1c1b 1763 " --replace=PATH Treat arguments as replacement for PATH\n"
1b600bd5 1764 " --inline Treat arguments as configuration lines\n"
dcd5c891 1765 " --no-pager Do not pipe output into a pager\n"
bc556335
DDM		 1766 "\nSee the %s for details.\n",
1767 program_invocation_short_name,
1768 link);
37ec0fdd
LP		 1769
1770 return 0;
1b992147
LP		 1771}
1772
1773static int parse_argv(int argc, char *argv[]) {
1774
1775 enum {
1776 ARG_VERSION = 0x100,
ec0327d6 1777 ARG_CAT_CONFIG,
1b992147 1778 ARG_ROOT,
0c3ee127 1779 ARG_IMAGE,
d16a1c1b 1780 ARG_REPLACE,
1b600bd5 1781 ARG_INLINE,
dcd5c891 1782 ARG_NO_PAGER,
1b992147
LP		 1783 };
1784
1785 static const struct option options[] = {
ec0327d6
ZJS		 1786 { "help", no_argument, NULL, 'h' },
1787 { "version", no_argument, NULL, ARG_VERSION },
1788 { "cat-config", no_argument, NULL, ARG_CAT_CONFIG },
1789 { "root", required_argument, NULL, ARG_ROOT },
0c3ee127 1790 { "image", required_argument, NULL, ARG_IMAGE },
ec0327d6
ZJS		 1791 { "replace", required_argument, NULL, ARG_REPLACE },
1792 { "inline", no_argument, NULL, ARG_INLINE },
dcd5c891 1793 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
1b992147
LP		 1794 {}
1795 };
1796
0f474365 1797 int c, r;
1b992147
LP		 1798
1799 assert(argc >= 0);
1800 assert(argv);
1801
601185b4 1802 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
1b992147
LP		 1803
1804 switch (c) {
1805
1806 case 'h':
37ec0fdd 1807 return help();
1b992147
LP		 1808
1809 case ARG_VERSION:
3f6fd1ba 1810 return version();
1b992147 1811
ec0327d6
ZJS		 1812 case ARG_CAT_CONFIG:
1813 arg_cat_config = true;
1814 break;
1815
1b992147 1816 case ARG_ROOT:
614b022c 1817 r = parse_path_argument(optarg, /* suppress_root= */ false, &arg_root);
0f474365 1818 if (r < 0)
0f03c2a4 1819 return r;
1b992147
LP		 1820 break;
1821
0c3ee127 1822 case ARG_IMAGE:
3537577c
ZJS		 1823#ifdef STANDALONE
1824 return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
1825 "This systemd-sysusers version is compiled without support for --image=.");
1826#else
614b022c 1827 r = parse_path_argument(optarg, /* suppress_root= */ false, &arg_image);
0c3ee127
LP		 1828 if (r < 0)
1829 return r;
1830 break;
3537577c 1831#endif
0c3ee127 1832
d16a1c1b
ZJS		 1833 case ARG_REPLACE:
1834 if (!path_is_absolute(optarg) ||
baaa35ad
ZJS		 1835 !endswith(optarg, ".conf"))
1836 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1837 "The argument to --replace= must an absolute path to a config file");
d16a1c1b
ZJS		 1838
1839 arg_replace = optarg;
1840 break;
1841
1b600bd5
ZJS		 1842 case ARG_INLINE:
1843 arg_inline = true;
1844 break;
1845
dcd5c891 1846 case ARG_NO_PAGER:
0221d68a 1847 arg_pager_flags |= PAGER_DISABLE;
dcd5c891
LP		 1848 break;
1849
1b992147
LP		 1850 case '?':
1851 return -EINVAL;
1852
1853 default:
1854 assert_not_reached("Unhandled option");
1855 }
1b992147 1856
baaa35ad
ZJS		 1857 if (arg_replace && arg_cat_config)
1858 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1859 "Option --replace= is not supported with --cat-config");
ec0327d6 1860
baaa35ad
ZJS		 1861 if (arg_replace && optind >= argc)
1862 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1863 "When --replace= is given, some configuration items must be specified");
d16a1c1b 1864
0c3ee127
LP		 1865 if (arg_image && arg_root)
1866 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Please specify either --root= or --image=, the combination of both is not supported.");
1867
1b992147
LP		 1868 return 1;
1869}
1870
d16a1c1b
ZJS		 1871static int parse_arguments(char **args) {
1872 char **arg;
1873 unsigned pos = 1;
1874 int r;
1875
1876 STRV_FOREACH(arg, args) {
1877 if (arg_inline)
1878 /* Use (argument):n, where n==1 for the first positional arg */
1879 r = parse_line("(argument)", pos, *arg);
1880 else
1881 r = read_config_file(*arg, false);
1882 if (r < 0)
1883 return r;
1884
1885 pos++;
1886 }
1887
1888 return 0;
1889}
1890
ec0327d6 1891static int read_config_files(char **args) {
d16a1c1b
ZJS		 1892 _cleanup_strv_free_ char **files = NULL;
1893 _cleanup_free_ char *p = NULL;
1894 char **f;
1895 int r;
1896
a826d4f7 1897 r = conf_files_list_with_replacement(arg_root, CONF_PATHS_STRV("sysusers.d"), arg_replace, &files, &p);
d16a1c1b 1898 if (r < 0)
ec0327d6 1899 return r;
d16a1c1b
ZJS		 1900
1901 STRV_FOREACH(f, files)
1902 if (p && path_equal(*f, p)) {
1903 log_debug("Parsing arguments at position \"%s\"…", *f);
1904
1905 r = parse_arguments(args);
1906 if (r < 0)
1907 return r;
1908 } else {
1909 log_debug("Reading config file \"%s\"…", *f);
1910
1911 /* Just warn, ignore result otherwise */
1912 (void) read_config_file(*f, true);
1913 }
1914
1915 return 0;
1916}
1917
71da1673 1918static int run(int argc, char *argv[]) {
3537577c 1919#ifndef STANDALONE
0c3ee127
LP		 1920 _cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL;
1921 _cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL;
1922 _cleanup_(umount_and_rmdir_and_freep) char *unlink_dir = NULL;
3537577c 1923#endif
1b992147 1924 _cleanup_close_ int lock = -1;
1b992147 1925 Item *i;
dd2fd972 1926 int r;
1b992147
LP		 1927
1928 r = parse_argv(argc, argv);
1929 if (r <= 0)
71da1673 1930 return r;
1b992147 1931
d2acb93d 1932 log_setup();
1b992147 1933
71da1673
YW		 1934 if (arg_cat_config)
1935 return cat_config();
ec0327d6 1936
1b992147
LP		 1937 umask(0022);
1938
c3dacc8b 1939 r = mac_selinux_init();
71da1673 1940 if (r < 0)
a9ba0e32 1941 return r;
1b992147 1942
3537577c 1943#ifndef STANDALONE
0c3ee127
LP		 1944 if (arg_image) {
1945 assert(!arg_root);
1946
1947 r = mount_image_privately_interactively(
1948 arg_image,
1949 DISSECT_IMAGE_REQUIRE_ROOT|DISSECT_IMAGE_VALIDATE_OS|DISSECT_IMAGE_RELAX_VAR_CHECK|DISSECT_IMAGE_FSCK,
1950 &unlink_dir,
1951 &loop_device,
1952 &decrypted_image);
1953 if (r < 0)
1954 return r;
1955
1956 arg_root = strdup(unlink_dir);
1957 if (!arg_root)
1958 return log_oom();
1959 }
3537577c
ZJS		 1960#else
1961 assert(!arg_image);
1962#endif
0c3ee127 1963
d16a1c1b
ZJS		 1964 /* If command line arguments are specified along with --replace, read all
1965 * configuration files and insert the positional arguments at the specified
1966 * place. Otherwise, if command line arguments are specified, execute just
1967 * them, and finally, without --replace= or any positional arguments, just
1968 * read configuration and execute it.
1969 */
1970 if (arg_replace || optind >= argc)
ec0327d6 1971 r = read_config_files(argv + optind);
d16a1c1b
ZJS		 1972 else
1973 r = parse_arguments(argv + optind);
1974 if (r < 0)
71da1673 1975 return r;
1b992147 1976
fe102d6a
LP		 1977 /* Let's tell nss-systemd not to synthesize the "root" and "nobody" entries for it, so that our detection
1978 * whether the names or UID/GID area already used otherwise doesn't get confused. After all, even though
1979 * nss-systemd synthesizes these users/groups, they should still appear in /etc/passwd and /etc/group, as the
1980 * synthesizing logic is merely supposed to be fallback for cases where we run with a completely unpopulated
1981 * /etc. */
71da1673
YW		 1982 if (setenv("SYSTEMD_NSS_BYPASS_SYNTHETIC", "1", 1) < 0)
1983 return log_error_errno(errno, "Failed to set SYSTEMD_NSS_BYPASS_SYNTHETIC environment variable: %m");
fe102d6a 1984
8530dc44 1985 if (!uid_range) {
aa25270c 1986 /* Default to default range of SYSTEMD_UID_MIN..SYSTEM_UID_MAX. */
4b6f9b20 1987 r = read_login_defs(&login_defs, NULL, arg_root);
71da1673 1988 if (r < 0)
aa25270c
ZJS		 1989 return log_error_errno(r, "Failed to read %s%s: %m",
1990 strempty(arg_root), "/etc/login.defs");
1991
4b6f9b20
ZJS		 1992 login_defs_need_warning = true;
1993
aa25270c
ZJS		 1994 /* We pick a range that very conservative: we look at compiled-in maximum and the value in
1995 * /etc/login.defs. That way the uids/gids which we allocate will be interpreted correctly,
1996 * even if /etc/login.defs is removed later. (The bottom bound doesn't matter much, since
1997 * it's only used during allocation, so we use the configured value directly). */
4b6f9b20
ZJS		 1998 uid_t begin = login_defs.system_alloc_uid_min,
1999 end = MIN3((uid_t) SYSTEM_UID_MAX, login_defs.system_uid_max, login_defs.system_gid_max);
aa25270c
ZJS		 2000 if (begin < end) {
2001 r = uid_range_add(&uid_range, &n_uid_range, begin, end - begin + 1);
2002 if (r < 0)
2003 return log_oom();
2004 }
8530dc44
LP		 2005 }
2006
a12b0cc3
LP		 2007 r = add_implicit();
2008 if (r < 0)
71da1673 2009 return r;
a12b0cc3 2010
e929bee0 2011 lock = take_etc_passwd_lock(arg_root);
71da1673
YW		 2012 if (lock < 0)
2013 return log_error_errno(lock, "Failed to take /etc/passwd lock: %m");
1b992147
LP		 2014
2015 r = load_user_database();
71da1673
YW		 2016 if (r < 0)
2017 return log_error_errno(r, "Failed to load user database: %m");
1b992147
LP		 2018
2019 r = load_group_database();
71da1673
YW		 2020 if (r < 0)
2021 return log_error_errno(r, "Failed to read group database: %m");
1b992147 2022
90e74a66 2023 ORDERED_HASHMAP_FOREACH(i, groups)
c1a32819 2024 (void) process_item(i);
1b992147 2025
90e74a66 2026 ORDERED_HASHMAP_FOREACH(i, users)
c1a32819 2027 (void) process_item(i);
1b992147
LP		 2028
2029 r = write_files();
2030 if (r < 0)
71da1673 2031 return log_error_errno(r, "Failed to write files: %m");
1b992147 2032
71da1673 2033 return 0;
1b992147 2034}
71da1673
YW		 2035
2036DEFINE_MAIN_FUNCTION(run);
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