1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2014 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
31 #include "specifier.h"
32 #include "path-util.h"
35 #include "conf-files.h"
38 #include "fileio-label.h"
39 #include "uid-range.h"
40 #include "selinux-util.h"
42 typedef enum ItemType {
67 static char *arg_root = NULL;
69 static const char conf_file_dirs[] = CONF_DIRS_NULSTR("sysusers");
71 static Hashmap *users = NULL, *groups = NULL;
72 static Hashmap *todo_uids = NULL, *todo_gids = NULL;
73 static Hashmap *members = NULL;
75 static Hashmap *database_uid = NULL, *database_user = NULL;
76 static Hashmap *database_gid = NULL, *database_group = NULL;
78 static uid_t search_uid = UID_INVALID;
79 static UidRange *uid_range = NULL;
80 static unsigned n_uid_range = 0;
82 #define fix_root(x) (arg_root ? strjoina(arg_root, x) : x)
84 static int load_user_database(void) {
85 _cleanup_fclose_ FILE *f = NULL;
86 const char *passwd_path;
90 passwd_path = fix_root("/etc/passwd");
91 f = fopen(passwd_path, "re");
93 return errno == ENOENT ? 0 : -errno;
95 r = hashmap_ensure_allocated(&database_user, &string_hash_ops);
99 r = hashmap_ensure_allocated(&database_uid, NULL);
104 while ((pw = fgetpwent(f))) {
108 n = strdup(pw->pw_name);
112 k = hashmap_put(database_user, n, UID_TO_PTR(pw->pw_uid));
113 if (k < 0 && k != -EEXIST) {
118 q = hashmap_put(database_uid, UID_TO_PTR(pw->pw_uid), n);
119 if (q < 0 && q != -EEXIST) {
130 if (!IN_SET(errno, 0, ENOENT))
136 static int load_group_database(void) {
137 _cleanup_fclose_ FILE *f = NULL;
138 const char *group_path;
142 group_path = fix_root("/etc/group");
143 f = fopen(group_path, "re");
145 return errno == ENOENT ? 0 : -errno;
147 r = hashmap_ensure_allocated(&database_group, &string_hash_ops);
151 r = hashmap_ensure_allocated(&database_gid, NULL);
156 while ((gr = fgetgrent(f))) {
160 n = strdup(gr->gr_name);
164 k = hashmap_put(database_group, n, GID_TO_PTR(gr->gr_gid));
165 if (k < 0 && k != -EEXIST) {
170 q = hashmap_put(database_gid, GID_TO_PTR(gr->gr_gid), n);
171 if (q < 0 && q != -EEXIST) {
182 if (!IN_SET(errno, 0, ENOENT))
188 static int make_backup(const char *target, const char *x) {
189 _cleanup_close_ int src = -1;
190 _cleanup_fclose_ FILE *dst = NULL;
192 struct timespec ts[2];
196 src = open(x, O_RDONLY|O_CLOEXEC|O_NOCTTY);
198 if (errno == ENOENT) /* No backup necessary... */
204 if (fstat(src, &st) < 0)
207 r = fopen_temporary_label(target, x, &dst, &temp);
211 r = copy_bytes(src, fileno(dst), (off_t) -1, true);
215 /* Don't fail on chmod() or chown(). If it stays owned by us
216 * and/or unreadable by others, then it isn't too bad... */
218 backup = strjoina(x, "-");
220 /* Copy over the access mask */
221 if (fchmod(fileno(dst), st.st_mode & 07777) < 0)
222 log_warning_errno(errno, "Failed to change mode on %s: %m", backup);
224 if (fchown(fileno(dst), st.st_uid, st.st_gid)< 0)
225 log_warning_errno(errno, "Failed to change ownership of %s: %m", backup);
229 if (futimens(fileno(dst), ts) < 0)
230 log_warning_errno(errno, "Failed to fix access and modification time of %s: %m", backup);
232 if (rename(temp, backup) < 0)
242 static int putgrent_with_members(const struct group *gr, FILE *group) {
248 a = hashmap_get(members, gr->gr_name);
250 _cleanup_strv_free_ char **l = NULL;
254 l = strv_copy(gr->gr_mem);
259 if (strv_find(l, *i))
262 if (strv_extend(&l, *i) < 0)
278 if (putgrent(&t, group) != 0)
279 return errno ? -errno : -EIO;
286 if (putgrent(gr, group) != 0)
287 return errno ? -errno : -EIO;
292 static int putsgent_with_members(const struct sgrp *sg, FILE *gshadow) {
298 a = hashmap_get(members, sg->sg_namp);
300 _cleanup_strv_free_ char **l = NULL;
304 l = strv_copy(sg->sg_mem);
309 if (strv_find(l, *i))
312 if (strv_extend(&l, *i) < 0)
328 if (putsgent(&t, gshadow) != 0)
329 return errno ? -errno : -EIO;
336 if (putsgent(sg, gshadow) != 0)
337 return errno ? -errno : -EIO;
342 static int sync_rights(FILE *from, FILE *to) {
345 if (fstat(fileno(from), &st) < 0)
348 if (fchmod(fileno(to), st.st_mode & 07777) < 0)
351 if (fchown(fileno(to), st.st_uid, st.st_gid) < 0)
357 static int write_files(void) {
359 _cleanup_fclose_ FILE *passwd = NULL, *group = NULL, *shadow = NULL, *gshadow = NULL;
360 _cleanup_free_ char *passwd_tmp = NULL, *group_tmp = NULL, *shadow_tmp = NULL, *gshadow_tmp = NULL;
361 const char *passwd_path = NULL, *group_path = NULL, *shadow_path = NULL, *gshadow_path = NULL;
362 bool group_changed = false;
367 if (hashmap_size(todo_gids) > 0 || hashmap_size(members) > 0) {
368 _cleanup_fclose_ FILE *original = NULL;
370 /* First we update the actual group list file */
371 group_path = fix_root("/etc/group");
372 r = fopen_temporary_label("/etc/group", group_path, &group, &group_tmp);
376 original = fopen(group_path, "re");
380 r = sync_rights(original, group);
385 while ((gr = fgetgrent(original))) {
386 /* Safety checks against name and GID
387 * collisions. Normally, this should
388 * be unnecessary, but given that we
389 * look at the entries anyway here,
390 * let's make an extra verification
391 * step that we don't generate
392 * duplicate entries. */
394 i = hashmap_get(groups, gr->gr_name);
395 if (i && i->todo_group) {
400 if (hashmap_contains(todo_gids, GID_TO_PTR(gr->gr_gid))) {
405 r = putgrent_with_members(gr, group);
409 group_changed = true;
413 if (!IN_SET(errno, 0, ENOENT)) {
418 } else if (errno != ENOENT) {
421 } else if (fchmod(fileno(group), 0644) < 0) {
426 HASHMAP_FOREACH(i, todo_gids, iterator) {
430 .gr_passwd = (char*) "x",
433 r = putgrent_with_members(&n, group);
437 group_changed = true;
440 r = fflush_and_check(group);
449 /* OK, now also update the shadow file for the group list */
450 gshadow_path = fix_root("/etc/gshadow");
451 r = fopen_temporary_label("/etc/gshadow", gshadow_path, &gshadow, &gshadow_tmp);
455 original = fopen(gshadow_path, "re");
459 r = sync_rights(original, gshadow);
464 while ((sg = fgetsgent(original))) {
466 i = hashmap_get(groups, sg->sg_namp);
467 if (i && i->todo_group) {
472 r = putsgent_with_members(sg, gshadow);
476 group_changed = true;
480 if (!IN_SET(errno, 0, ENOENT)) {
485 } else if (errno != ENOENT) {
488 } else if (fchmod(fileno(gshadow), 0000) < 0) {
493 HASHMAP_FOREACH(i, todo_gids, iterator) {
496 .sg_passwd = (char*) "!!",
499 r = putsgent_with_members(&n, gshadow);
503 group_changed = true;
506 r = fflush_and_check(gshadow);
511 if (hashmap_size(todo_uids) > 0) {
512 _cleanup_fclose_ FILE *original = NULL;
515 /* First we update the user database itself */
516 passwd_path = fix_root("/etc/passwd");
517 r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp);
521 original = fopen(passwd_path, "re");
525 r = sync_rights(original, passwd);
530 while ((pw = fgetpwent(original))) {
532 i = hashmap_get(users, pw->pw_name);
533 if (i && i->todo_user) {
538 if (hashmap_contains(todo_uids, UID_TO_PTR(pw->pw_uid))) {
544 if (putpwent(pw, passwd) < 0) {
545 r = errno ? -errno : -EIO;
551 if (!IN_SET(errno, 0, ENOENT)) {
556 } else if (errno != ENOENT) {
559 } else if (fchmod(fileno(passwd), 0644) < 0) {
564 HASHMAP_FOREACH(i, todo_uids, iterator) {
569 .pw_gecos = i->description,
571 /* "x" means the password is stored in
573 .pw_passwd = (char*) "x",
575 /* We default to the root directory as home */
576 .pw_dir = i->home ? i->home : (char*) "/",
578 /* Initialize the shell to nologin,
579 * with one exception: for root we
580 * patch in something special */
581 .pw_shell = i->uid == 0 ? (char*) "/bin/sh" : (char*) "/sbin/nologin",
585 if (putpwent(&n, passwd) != 0) {
586 r = errno ? -errno : -EIO;
591 r = fflush_and_check(passwd);
600 /* The we update the shadow database */
601 shadow_path = fix_root("/etc/shadow");
602 r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp);
606 lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY);
608 original = fopen(shadow_path, "re");
612 r = sync_rights(original, shadow);
617 while ((sp = fgetspent(original))) {
619 i = hashmap_get(users, sp->sp_namp);
620 if (i && i->todo_user) {
621 /* we will update the existing entry */
622 sp->sp_lstchg = lstchg;
624 /* only the /etc/shadow stage is left, so we can
625 * safely remove the item from the todo set */
626 i->todo_user = false;
627 hashmap_remove(todo_uids, UID_TO_PTR(i->uid));
631 if (putspent(sp, shadow) < 0) {
632 r = errno ? -errno : -EIO;
638 if (!IN_SET(errno, 0, ENOENT)) {
642 } else if (errno != ENOENT) {
645 } else if (fchmod(fileno(shadow), 0000) < 0) {
650 HASHMAP_FOREACH(i, todo_uids, iterator) {
653 .sp_pwdp = (char*) "!!",
660 .sp_flag = (unsigned long) -1, /* this appears to be what everybody does ... */
664 if (putspent(&n, shadow) != 0) {
665 r = errno ? -errno : -EIO;
670 r = fflush_and_check(shadow);
675 /* Make a backup of the old files */
678 r = make_backup("/etc/group", group_path);
683 r = make_backup("/etc/gshadow", gshadow_path);
690 r = make_backup("/etc/passwd", passwd_path);
695 r = make_backup("/etc/shadow", shadow_path);
700 /* And make the new files count */
703 if (rename(group_tmp, group_path) < 0) {
712 if (rename(gshadow_tmp, gshadow_path) < 0) {
723 if (rename(passwd_tmp, passwd_path) < 0) {
732 if (rename(shadow_tmp, shadow_path) < 0) {
756 static int uid_is_ok(uid_t uid, const char *name) {
762 /* Let's see if we already have assigned the UID a second time */
763 if (hashmap_get(todo_uids, UID_TO_PTR(uid)))
766 /* Try to avoid using uids that are already used by a group
767 * that doesn't have the same name as our new user. */
768 i = hashmap_get(todo_gids, GID_TO_PTR(uid));
769 if (i && !streq(i->name, name))
772 /* Let's check the files directly */
773 if (hashmap_contains(database_uid, UID_TO_PTR(uid)))
776 n = hashmap_get(database_gid, GID_TO_PTR(uid));
777 if (n && !streq(n, name))
780 /* Let's also check via NSS, to avoid UID clashes over LDAP and such, just in case */
786 if (!IN_SET(errno, 0, ENOENT))
790 g = getgrgid((gid_t) uid);
792 if (!streq(g->gr_name, name))
794 } else if (!IN_SET(errno, 0, ENOENT))
801 static int root_stat(const char *p, struct stat *st) {
805 if (stat(fix, st) < 0)
811 static int read_id_from_file(Item *i, uid_t *_uid, gid_t *_gid) {
813 bool found_uid = false, found_gid = false;
819 /* First, try to get the gid directly */
820 if (_gid && i->gid_path && root_stat(i->gid_path, &st) >= 0) {
825 /* Then, try to get the uid directly */
826 if ((_uid || (_gid && !found_gid))
828 && root_stat(i->uid_path, &st) >= 0) {
833 /* If we need the gid, but had no success yet, also derive it from the uid path */
834 if (_gid && !found_gid) {
840 /* If that didn't work yet, then let's reuse the gid as uid */
841 if (_uid && !found_uid && i->gid_path) {
846 } else if (root_stat(i->gid_path, &st) >= 0) {
847 uid = (uid_t) st.st_gid;
869 static int add_user(Item *i) {
875 /* Check the database directly */
876 z = hashmap_get(database_user, i->name);
878 log_debug("User %s already exists.", i->name);
879 i->uid = PTR_TO_UID(z);
889 p = getpwnam(i->name);
891 log_debug("User %s already exists.", i->name);
895 free(i->description);
896 i->description = strdup(p->pw_gecos);
899 if (!IN_SET(errno, 0, ENOENT))
900 return log_error_errno(errno, "Failed to check if user %s already exists: %m", i->name);
903 /* Try to use the suggested numeric uid */
905 r = uid_is_ok(i->uid, i->name);
907 return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
909 log_debug("Suggested user ID " UID_FMT " for %s already used.", i->uid, i->name);
914 /* If that didn't work, try to read it from the specified path */
918 if (read_id_from_file(i, &c, NULL) > 0) {
920 if (c <= 0 || !uid_range_contains(uid_range, n_uid_range, c))
921 log_debug("User ID " UID_FMT " of file not suitable for %s.", c, i->name);
923 r = uid_is_ok(c, i->name);
925 return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
930 log_debug("User ID " UID_FMT " of file for %s is already used.", c, i->name);
935 /* Otherwise try to reuse the group ID */
936 if (!i->uid_set && i->gid_set) {
937 r = uid_is_ok((uid_t) i->gid, i->name);
939 return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
941 i->uid = (uid_t) i->gid;
946 /* And if that didn't work either, let's try to find a free one */
949 r = uid_range_next_lower(uid_range, n_uid_range, &search_uid);
951 log_error("No free user ID available for %s.", i->name);
955 r = uid_is_ok(search_uid, i->name);
957 return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
966 r = hashmap_ensure_allocated(&todo_uids, NULL);
970 r = hashmap_put(todo_uids, UID_TO_PTR(i->uid), i);
975 log_info("Creating user %s (%s) with uid " UID_FMT " and gid " GID_FMT ".", i->name, strna(i->description), i->uid, i->gid);
980 static int gid_is_ok(gid_t gid) {
984 if (hashmap_get(todo_gids, GID_TO_PTR(gid)))
987 /* Avoid reusing gids that are already used by a different user */
988 if (hashmap_get(todo_uids, UID_TO_PTR(gid)))
991 if (hashmap_contains(database_gid, GID_TO_PTR(gid)))
994 if (hashmap_contains(database_uid, UID_TO_PTR(gid)))
1002 if (!IN_SET(errno, 0, ENOENT))
1006 p = getpwuid((uid_t) gid);
1009 if (!IN_SET(errno, 0, ENOENT))
1016 static int add_group(Item *i) {
1022 /* Check the database directly */
1023 z = hashmap_get(database_group, i->name);
1025 log_debug("Group %s already exists.", i->name);
1026 i->gid = PTR_TO_GID(z);
1031 /* Also check NSS */
1036 g = getgrnam(i->name);
1038 log_debug("Group %s already exists.", i->name);
1043 if (!IN_SET(errno, 0, ENOENT))
1044 return log_error_errno(errno, "Failed to check if group %s already exists: %m", i->name);
1047 /* Try to use the suggested numeric gid */
1049 r = gid_is_ok(i->gid);
1051 return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
1053 log_debug("Suggested group ID " GID_FMT " for %s already used.", i->gid, i->name);
1058 /* Try to reuse the numeric uid, if there's one */
1059 if (!i->gid_set && i->uid_set) {
1060 r = gid_is_ok((gid_t) i->uid);
1062 return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
1064 i->gid = (gid_t) i->uid;
1069 /* If that didn't work, try to read it from the specified path */
1073 if (read_id_from_file(i, NULL, &c) > 0) {
1075 if (c <= 0 || !uid_range_contains(uid_range, n_uid_range, c))
1076 log_debug("Group ID " GID_FMT " of file not suitable for %s.", c, i->name);
1080 return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
1085 log_debug("Group ID " GID_FMT " of file for %s already used.", c, i->name);
1090 /* And if that didn't work either, let's try to find a free one */
1093 /* We look for new GIDs in the UID pool! */
1094 r = uid_range_next_lower(uid_range, n_uid_range, &search_uid);
1096 log_error("No free group ID available for %s.", i->name);
1100 r = gid_is_ok(search_uid);
1102 return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
1108 i->gid = search_uid;
1111 r = hashmap_ensure_allocated(&todo_gids, NULL);
1115 r = hashmap_put(todo_gids, GID_TO_PTR(i->gid), i);
1119 i->todo_group = true;
1120 log_info("Creating group %s with gid " GID_FMT ".", i->name, i->gid);
1125 static int process_item(Item *i) {
1142 j = hashmap_get(users, i->name);
1144 /* There's already user to be created for this
1145 * name, let's process that in one step */
1154 j->gid_path = strdup(i->gid_path);
1162 return add_group(i);
1166 assert_not_reached("Unknown item type");
1170 static void item_free(Item *i) {
1178 free(i->description);
1182 DEFINE_TRIVIAL_CLEANUP_FUNC(Item*, item_free);
1184 static int add_implicit(void) {
1189 /* Implicitly create additional users and groups, if they were listed in "m" lines */
1191 HASHMAP_FOREACH_KEY(l, g, members, iterator) {
1195 i = hashmap_get(groups, g);
1197 _cleanup_(item_freep) Item *j = NULL;
1199 r = hashmap_ensure_allocated(&groups, &string_hash_ops);
1207 j->type = ADD_GROUP;
1208 j->name = strdup(g);
1212 r = hashmap_put(groups, j->name, j);
1216 log_debug("Adding implicit group '%s' due to m line", j->name);
1220 STRV_FOREACH(m, l) {
1222 i = hashmap_get(users, *m);
1224 _cleanup_(item_freep) Item *j = NULL;
1226 r = hashmap_ensure_allocated(&users, &string_hash_ops);
1235 j->name = strdup(*m);
1239 r = hashmap_put(users, j->name, j);
1243 log_debug("Adding implicit user '%s' due to m line", j->name);
1252 static bool item_equal(Item *a, Item *b) {
1256 if (a->type != b->type)
1259 if (!streq_ptr(a->name, b->name))
1262 if (!streq_ptr(a->uid_path, b->uid_path))
1265 if (!streq_ptr(a->gid_path, b->gid_path))
1268 if (!streq_ptr(a->description, b->description))
1271 if (a->uid_set != b->uid_set)
1274 if (a->uid_set && a->uid != b->uid)
1277 if (a->gid_set != b->gid_set)
1280 if (a->gid_set && a->gid != b->gid)
1283 if (!streq_ptr(a->home, b->home))
1289 static bool valid_user_group_name(const char *u) {
1296 if (!(u[0] >= 'a' && u[0] <= 'z') &&
1297 !(u[0] >= 'A' && u[0] <= 'Z') &&
1301 for (i = u+1; *i; i++) {
1302 if (!(*i >= 'a' && *i <= 'z') &&
1303 !(*i >= 'A' && *i <= 'Z') &&
1304 !(*i >= '0' && *i <= '9') &&
1310 sz = sysconf(_SC_LOGIN_NAME_MAX);
1313 if ((size_t) (i-u) > (size_t) sz)
1316 if ((size_t) (i-u) > UT_NAMESIZE - 1)
1322 static bool valid_gecos(const char *d) {
1327 if (!utf8_is_valid(d))
1330 if (string_has_cc(d, NULL))
1333 /* Colons are used as field separators, and hence not OK */
1340 static bool valid_home(const char *p) {
1345 if (!utf8_is_valid(p))
1348 if (string_has_cc(p, NULL))
1351 if (!path_is_absolute(p))
1354 if (!path_is_safe(p))
1357 /* Colons are used as field separators, and hence not OK */
1364 static int parse_line(const char *fname, unsigned line, const char *buffer) {
1366 static const Specifier specifier_table[] = {
1367 { 'm', specifier_machine_id, NULL },
1368 { 'b', specifier_boot_id, NULL },
1369 { 'H', specifier_host_name, NULL },
1370 { 'v', specifier_kernel_release, NULL },
1374 _cleanup_free_ char *action = NULL, *name = NULL, *id = NULL, *resolved_name = NULL, *resolved_id = NULL, *description = NULL, *home = NULL;
1375 _cleanup_(item_freep) Item *i = NULL;
1387 r = unquote_many_words(&p, 0, &action, &name, &id, &description, &home, NULL);
1389 log_error("[%s:%u] Syntax error.", fname, line);
1393 log_error("[%s:%u] Missing action and name columns.", fname, line);
1397 log_error("[%s:%u] Trailing garbage.", fname, line);
1402 if (strlen(action) != 1) {
1403 log_error("[%s:%u] Unknown modifier '%s'", fname, line, action);
1407 if (!IN_SET(action[0], ADD_USER, ADD_GROUP, ADD_MEMBER, ADD_RANGE)) {
1408 log_error("[%s:%u] Unknown command command type '%c'.", fname, line, action[0]);
1413 if (isempty(name) || streq(name, "-")) {
1419 r = specifier_printf(name, specifier_table, NULL, &resolved_name);
1421 log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, name);
1425 if (!valid_user_group_name(resolved_name)) {
1426 log_error("[%s:%u] '%s' is not a valid user or group name.", fname, line, resolved_name);
1432 if (isempty(id) || streq(id, "-")) {
1438 r = specifier_printf(id, specifier_table, NULL, &resolved_id);
1440 log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, name);
1445 /* Verify description */
1446 if (isempty(description) || streq(description, "-")) {
1452 if (!valid_gecos(description)) {
1453 log_error("[%s:%u] '%s' is not a valid GECOS field.", fname, line, description);
1459 if (isempty(home) || streq(home, "-")) {
1465 if (!valid_home(home)) {
1466 log_error("[%s:%u] '%s' is not a valid home directory field.", fname, line, home);
1471 switch (action[0]) {
1474 if (resolved_name) {
1475 log_error("[%s:%u] Lines of type 'r' don't take a name field.", fname, line);
1480 log_error("[%s:%u] Lines of type 'r' require a ID range in the third field.", fname, line);
1485 log_error("[%s:%u] Lines of type 'r' don't take a GECOS field.", fname, line);
1490 log_error("[%s:%u] Lines of type 'r' don't take a home directory field.", fname, line);
1494 r = uid_range_add_str(&uid_range, &n_uid_range, resolved_id);
1496 log_error("[%s:%u] Invalid UID range %s.", fname, line, resolved_id);
1505 /* Try to extend an existing member or group item */
1507 log_error("[%s:%u] Lines of type 'm' require a user name in the second field.", fname, line);
1512 log_error("[%s:%u] Lines of type 'm' require a group name in the third field.", fname, line);
1516 if (!valid_user_group_name(resolved_id)) {
1517 log_error("[%s:%u] '%s' is not a valid user or group name.", fname, line, resolved_id);
1522 log_error("[%s:%u] Lines of type 'm' don't take a GECOS field.", fname, line);
1527 log_error("[%s:%u] Lines of type 'm' don't take a home directory field.", fname, line);
1531 r = hashmap_ensure_allocated(&members, &string_hash_ops);
1535 l = hashmap_get(members, resolved_id);
1537 /* A list for this group name already exists, let's append to it */
1538 r = strv_push(&l, resolved_name);
1542 resolved_name = NULL;
1544 assert_se(hashmap_update(members, resolved_id, l) >= 0);
1546 /* No list for this group name exists yet, create one */
1548 l = new0(char *, 2);
1552 l[0] = resolved_name;
1555 r = hashmap_put(members, resolved_id, l);
1561 resolved_id = resolved_name = NULL;
1569 log_error("[%s:%u] Lines of type 'u' require a user name in the second field.", fname, line);
1573 r = hashmap_ensure_allocated(&users, &string_hash_ops);
1582 if (path_is_absolute(resolved_id)) {
1583 i->uid_path = resolved_id;
1586 path_kill_slashes(i->uid_path);
1588 r = parse_uid(resolved_id, &i->uid);
1590 log_error("Failed to parse UID: %s", id);
1598 i->description = description;
1609 log_error("[%s:%u] Lines of type 'g' require a user name in the second field.", fname, line);
1614 log_error("[%s:%u] Lines of type 'g' don't take a GECOS field.", fname, line);
1619 log_error("[%s:%u] Lines of type 'g' don't take a home directory field.", fname, line);
1623 r = hashmap_ensure_allocated(&groups, &string_hash_ops);
1632 if (path_is_absolute(resolved_id)) {
1633 i->gid_path = resolved_id;
1636 path_kill_slashes(i->gid_path);
1638 r = parse_gid(resolved_id, &i->gid);
1640 log_error("Failed to parse GID: %s", id);
1655 i->type = action[0];
1656 i->name = resolved_name;
1657 resolved_name = NULL;
1659 existing = hashmap_get(h, i->name);
1662 /* Two identical items are fine */
1663 if (!item_equal(existing, i))
1664 log_warning("Two or more conflicting lines for %s configured, ignoring.", i->name);
1669 r = hashmap_put(h, i->name, i);
1677 static int read_config_file(const char *fn, bool ignore_enoent) {
1678 _cleanup_fclose_ FILE *rf = NULL;
1680 char line[LINE_MAX];
1689 r = search_and_fopen_nulstr(fn, "re", arg_root, conf_file_dirs, &rf);
1691 if (ignore_enoent && r == -ENOENT)
1694 return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn);
1700 FOREACH_LINE(line, f, break) {
1707 if (*l == '#' || *l == 0)
1710 k = parse_line(fn, v, l);
1711 if (k < 0 && r == 0)
1716 log_error_errno(errno, "Failed to read from file %s: %m", fn);
1724 static void free_database(Hashmap *by_name, Hashmap *by_id) {
1728 name = hashmap_first(by_id);
1732 hashmap_remove(by_name, name);
1734 hashmap_steal_first_key(by_id);
1738 while ((name = hashmap_steal_first_key(by_name)))
1741 hashmap_free(by_name);
1742 hashmap_free(by_id);
1745 static void help(void) {
1746 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
1747 "Creates system user accounts.\n\n"
1748 " -h --help Show this help\n"
1749 " --version Show package version\n"
1750 " --root=PATH Operate on an alternate filesystem root\n"
1751 , program_invocation_short_name);
1754 static int parse_argv(int argc, char *argv[]) {
1757 ARG_VERSION = 0x100,
1761 static const struct option options[] = {
1762 { "help", no_argument, NULL, 'h' },
1763 { "version", no_argument, NULL, ARG_VERSION },
1764 { "root", required_argument, NULL, ARG_ROOT },
1773 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
1782 puts(PACKAGE_STRING);
1783 puts(SYSTEMD_FEATURES);
1788 arg_root = path_make_absolute_cwd(optarg);
1792 path_kill_slashes(arg_root);
1799 assert_not_reached("Unhandled option");
1805 int main(int argc, char *argv[]) {
1807 _cleanup_close_ int lock = -1;
1813 r = parse_argv(argc, argv);
1817 log_set_target(LOG_TARGET_AUTO);
1818 log_parse_environment();
1823 r = mac_selinux_init(NULL);
1825 log_error_errno(r, "SELinux setup failed: %m");
1829 if (optind < argc) {
1832 for (j = optind; j < argc; j++) {
1833 k = read_config_file(argv[j], false);
1834 if (k < 0 && r == 0)
1838 _cleanup_strv_free_ char **files = NULL;
1841 r = conf_files_list_nulstr(&files, ".conf", arg_root, conf_file_dirs);
1843 log_error_errno(r, "Failed to enumerate sysusers.d files: %m");
1847 STRV_FOREACH(f, files) {
1848 k = read_config_file(*f, true);
1849 if (k < 0 && r == 0)
1855 /* Default to default range of 1..SYSTEMD_UID_MAX */
1856 r = uid_range_add(&uid_range, &n_uid_range, 1, SYSTEM_UID_MAX);
1867 lock = take_password_lock(arg_root);
1869 log_error_errno(lock, "Failed to take lock: %m");
1873 r = load_user_database();
1875 log_error_errno(r, "Failed to load user database: %m");
1879 r = load_group_database();
1881 log_error_errno(r, "Failed to read group database: %m");
1885 HASHMAP_FOREACH(i, groups, iterator)
1888 HASHMAP_FOREACH(i, users, iterator)
1893 log_error_errno(r, "Failed to write files: %m");
1896 while ((i = hashmap_steal_first(groups)))
1899 while ((i = hashmap_steal_first(users)))
1902 while ((n = hashmap_first_key(members))) {
1903 strv_free(hashmap_steal_first(members));
1907 hashmap_free(groups);
1908 hashmap_free(users);
1909 hashmap_free(members);
1910 hashmap_free(todo_uids);
1911 hashmap_free(todo_gids);
1913 free_database(database_user, database_uid);
1914 free_database(database_group, database_gid);
1918 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;