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-rw-r--r--src/sysusers/sysusers.c1919
1 files changed, 0 insertions, 1919 deletions
diff --git a/src/sysusers/sysusers.c b/src/sysusers/sysusers.c
deleted file mode 100644
index e549df6d3e..0000000000
--- a/src/sysusers/sysusers.c
+++ /dev/null
@@ -1,1919 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2014 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <pwd.h>
-#include <grp.h>
-#include <shadow.h>
-#include <gshadow.h>
-#include <getopt.h>
-#include <utmp.h>
-
-#include "util.h"
-#include "hashmap.h"
-#include "specifier.h"
-#include "path-util.h"
-#include "build.h"
-#include "strv.h"
-#include "conf-files.h"
-#include "copy.h"
-#include "utf8.h"
-#include "fileio-label.h"
-#include "uid-range.h"
-#include "selinux-util.h"
-
-typedef enum ItemType {
- ADD_USER = 'u',
- ADD_GROUP = 'g',
- ADD_MEMBER = 'm',
- ADD_RANGE = 'r',
-} ItemType;
-typedef struct Item {
- ItemType type;
-
- char *name;
- char *uid_path;
- char *gid_path;
- char *description;
- char *home;
-
- gid_t gid;
- uid_t uid;
-
- bool gid_set:1;
- bool uid_set:1;
-
- bool todo_user:1;
- bool todo_group:1;
-} Item;
-
-static char *arg_root = NULL;
-
-static const char conf_file_dirs[] = CONF_DIRS_NULSTR("sysusers");
-
-static Hashmap *users = NULL, *groups = NULL;
-static Hashmap *todo_uids = NULL, *todo_gids = NULL;
-static Hashmap *members = NULL;
-
-static Hashmap *database_uid = NULL, *database_user = NULL;
-static Hashmap *database_gid = NULL, *database_group = NULL;
-
-static uid_t search_uid = UID_INVALID;
-static UidRange *uid_range = NULL;
-static unsigned n_uid_range = 0;
-
-#define fix_root(x) (arg_root ? strjoina(arg_root, x) : x)
-
-static int load_user_database(void) {
- _cleanup_fclose_ FILE *f = NULL;
- const char *passwd_path;
- struct passwd *pw;
- int r;
-
- passwd_path = fix_root("/etc/passwd");
- f = fopen(passwd_path, "re");
- if (!f)
- return errno == ENOENT ? 0 : -errno;
-
- r = hashmap_ensure_allocated(&database_user, &string_hash_ops);
- if (r < 0)
- return r;
-
- r = hashmap_ensure_allocated(&database_uid, NULL);
- if (r < 0)
- return r;
-
- errno = 0;
- while ((pw = fgetpwent(f))) {
- char *n;
- int k, q;
-
- n = strdup(pw->pw_name);
- if (!n)
- return -ENOMEM;
-
- k = hashmap_put(database_user, n, UID_TO_PTR(pw->pw_uid));
- if (k < 0 && k != -EEXIST) {
- free(n);
- return k;
- }
-
- q = hashmap_put(database_uid, UID_TO_PTR(pw->pw_uid), n);
- if (q < 0 && q != -EEXIST) {
- if (k < 0)
- free(n);
- return q;
- }
-
- if (q < 0 && k < 0)
- free(n);
-
- errno = 0;
- }
- if (!IN_SET(errno, 0, ENOENT))
- return -errno;
-
- return 0;
-}
-
-static int load_group_database(void) {
- _cleanup_fclose_ FILE *f = NULL;
- const char *group_path;
- struct group *gr;
- int r;
-
- group_path = fix_root("/etc/group");
- f = fopen(group_path, "re");
- if (!f)
- return errno == ENOENT ? 0 : -errno;
-
- r = hashmap_ensure_allocated(&database_group, &string_hash_ops);
- if (r < 0)
- return r;
-
- r = hashmap_ensure_allocated(&database_gid, NULL);
- if (r < 0)
- return r;
-
- errno = 0;
- while ((gr = fgetgrent(f))) {
- char *n;
- int k, q;
-
- n = strdup(gr->gr_name);
- if (!n)
- return -ENOMEM;
-
- k = hashmap_put(database_group, n, GID_TO_PTR(gr->gr_gid));
- if (k < 0 && k != -EEXIST) {
- free(n);
- return k;
- }
-
- q = hashmap_put(database_gid, GID_TO_PTR(gr->gr_gid), n);
- if (q < 0 && q != -EEXIST) {
- if (k < 0)
- free(n);
- return q;
- }
-
- if (q < 0 && k < 0)
- free(n);
-
- errno = 0;
- }
- if (!IN_SET(errno, 0, ENOENT))
- return -errno;
-
- return 0;
-}
-
-static int make_backup(const char *target, const char *x) {
- _cleanup_close_ int src = -1;
- _cleanup_fclose_ FILE *dst = NULL;
- char *backup, *temp;
- struct timespec ts[2];
- struct stat st;
- int r;
-
- src = open(x, O_RDONLY|O_CLOEXEC|O_NOCTTY);
- if (src < 0) {
- if (errno == ENOENT) /* No backup necessary... */
- return 0;
-
- return -errno;
- }
-
- if (fstat(src, &st) < 0)
- return -errno;
-
- r = fopen_temporary_label(target, x, &dst, &temp);
- if (r < 0)
- return r;
-
- r = copy_bytes(src, fileno(dst), (off_t) -1, true);
- if (r < 0)
- goto fail;
-
- /* Don't fail on chmod() or chown(). If it stays owned by us
- * and/or unreadable by others, then it isn't too bad... */
-
- backup = strjoina(x, "-");
-
- /* Copy over the access mask */
- if (fchmod(fileno(dst), st.st_mode & 07777) < 0)
- log_warning_errno(errno, "Failed to change mode on %s: %m", backup);
-
- if (fchown(fileno(dst), st.st_uid, st.st_gid)< 0)
- log_warning_errno(errno, "Failed to change ownership of %s: %m", backup);
-
- ts[0] = st.st_atim;
- ts[1] = st.st_mtim;
- if (futimens(fileno(dst), ts) < 0)
- log_warning_errno(errno, "Failed to fix access and modification time of %s: %m", backup);
-
- if (rename(temp, backup) < 0)
- goto fail;
-
- return 0;
-
-fail:
- unlink(temp);
- return r;
-}
-
-static int putgrent_with_members(const struct group *gr, FILE *group) {
- char **a;
-
- assert(gr);
- assert(group);
-
- a = hashmap_get(members, gr->gr_name);
- if (a) {
- _cleanup_strv_free_ char **l = NULL;
- bool added = false;
- char **i;
-
- l = strv_copy(gr->gr_mem);
- if (!l)
- return -ENOMEM;
-
- STRV_FOREACH(i, a) {
- if (strv_find(l, *i))
- continue;
-
- if (strv_extend(&l, *i) < 0)
- return -ENOMEM;
-
- added = true;
- }
-
- if (added) {
- struct group t;
-
- strv_uniq(l);
- strv_sort(l);
-
- t = *gr;
- t.gr_mem = l;
-
- errno = 0;
- if (putgrent(&t, group) != 0)
- return errno ? -errno : -EIO;
-
- return 1;
- }
- }
-
- errno = 0;
- if (putgrent(gr, group) != 0)
- return errno ? -errno : -EIO;
-
- return 0;
-}
-
-static int putsgent_with_members(const struct sgrp *sg, FILE *gshadow) {
- char **a;
-
- assert(sg);
- assert(gshadow);
-
- a = hashmap_get(members, sg->sg_namp);
- if (a) {
- _cleanup_strv_free_ char **l = NULL;
- bool added = false;
- char **i;
-
- l = strv_copy(sg->sg_mem);
- if (!l)
- return -ENOMEM;
-
- STRV_FOREACH(i, a) {
- if (strv_find(l, *i))
- continue;
-
- if (strv_extend(&l, *i) < 0)
- return -ENOMEM;
-
- added = true;
- }
-
- if (added) {
- struct sgrp t;
-
- strv_uniq(l);
- strv_sort(l);
-
- t = *sg;
- t.sg_mem = l;
-
- errno = 0;
- if (putsgent(&t, gshadow) != 0)
- return errno ? -errno : -EIO;
-
- return 1;
- }
- }
-
- errno = 0;
- if (putsgent(sg, gshadow) != 0)
- return errno ? -errno : -EIO;
-
- return 0;
-}
-
-static int sync_rights(FILE *from, FILE *to) {
- struct stat st;
-
- if (fstat(fileno(from), &st) < 0)
- return -errno;
-
- if (fchmod(fileno(to), st.st_mode & 07777) < 0)
- return -errno;
-
- if (fchown(fileno(to), st.st_uid, st.st_gid) < 0)
- return -errno;
-
- return 0;
-}
-
-static int write_files(void) {
-
- _cleanup_fclose_ FILE *passwd = NULL, *group = NULL, *shadow = NULL, *gshadow = NULL;
- _cleanup_free_ char *passwd_tmp = NULL, *group_tmp = NULL, *shadow_tmp = NULL, *gshadow_tmp = NULL;
- const char *passwd_path = NULL, *group_path = NULL, *shadow_path = NULL, *gshadow_path = NULL;
- bool group_changed = false;
- Iterator iterator;
- Item *i;
- int r;
-
- if (hashmap_size(todo_gids) > 0 || hashmap_size(members) > 0) {
- _cleanup_fclose_ FILE *original = NULL;
-
- /* First we update the actual group list file */
- group_path = fix_root("/etc/group");
- r = fopen_temporary_label("/etc/group", group_path, &group, &group_tmp);
- if (r < 0)
- goto finish;
-
- original = fopen(group_path, "re");
- if (original) {
- struct group *gr;
-
- r = sync_rights(original, group);
- if (r < 0)
- goto finish;
-
- errno = 0;
- while ((gr = fgetgrent(original))) {
- /* Safety checks against name and GID
- * collisions. Normally, this should
- * be unnecessary, but given that we
- * look at the entries anyway here,
- * let's make an extra verification
- * step that we don't generate
- * duplicate entries. */
-
- i = hashmap_get(groups, gr->gr_name);
- if (i && i->todo_group) {
- r = -EEXIST;
- goto finish;
- }
-
- if (hashmap_contains(todo_gids, GID_TO_PTR(gr->gr_gid))) {
- r = -EEXIST;
- goto finish;
- }
-
- r = putgrent_with_members(gr, group);
- if (r < 0)
- goto finish;
- if (r > 0)
- group_changed = true;
-
- errno = 0;
- }
- if (!IN_SET(errno, 0, ENOENT)) {
- r = -errno;
- goto finish;
- }
-
- } else if (errno != ENOENT) {
- r = -errno;
- goto finish;
- } else if (fchmod(fileno(group), 0644) < 0) {
- r = -errno;
- goto finish;
- }
-
- HASHMAP_FOREACH(i, todo_gids, iterator) {
- struct group n = {
- .gr_name = i->name,
- .gr_gid = i->gid,
- .gr_passwd = (char*) "x",
- };
-
- r = putgrent_with_members(&n, group);
- if (r < 0)
- goto finish;
-
- group_changed = true;
- }
-
- r = fflush_and_check(group);
- if (r < 0)
- goto finish;
-
- if (original) {
- fclose(original);
- original = NULL;
- }
-
- /* OK, now also update the shadow file for the group list */
- gshadow_path = fix_root("/etc/gshadow");
- r = fopen_temporary_label("/etc/gshadow", gshadow_path, &gshadow, &gshadow_tmp);
- if (r < 0)
- goto finish;
-
- original = fopen(gshadow_path, "re");
- if (original) {
- struct sgrp *sg;
-
- r = sync_rights(original, gshadow);
- if (r < 0)
- goto finish;
-
- errno = 0;
- while ((sg = fgetsgent(original))) {
-
- i = hashmap_get(groups, sg->sg_namp);
- if (i && i->todo_group) {
- r = -EEXIST;
- goto finish;
- }
-
- r = putsgent_with_members(sg, gshadow);
- if (r < 0)
- goto finish;
- if (r > 0)
- group_changed = true;
-
- errno = 0;
- }
- if (!IN_SET(errno, 0, ENOENT)) {
- r = -errno;
- goto finish;
- }
-
- } else if (errno != ENOENT) {
- r = -errno;
- goto finish;
- } else if (fchmod(fileno(gshadow), 0000) < 0) {
- r = -errno;
- goto finish;
- }
-
- HASHMAP_FOREACH(i, todo_gids, iterator) {
- struct sgrp n = {
- .sg_namp = i->name,
- .sg_passwd = (char*) "!!",
- };
-
- r = putsgent_with_members(&n, gshadow);
- if (r < 0)
- goto finish;
-
- group_changed = true;
- }
-
- r = fflush_and_check(gshadow);
- if (r < 0)
- goto finish;
- }
-
- if (hashmap_size(todo_uids) > 0) {
- _cleanup_fclose_ FILE *original = NULL;
- long lstchg;
-
- /* First we update the user database itself */
- passwd_path = fix_root("/etc/passwd");
- r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp);
- if (r < 0)
- goto finish;
-
- original = fopen(passwd_path, "re");
- if (original) {
- struct passwd *pw;
-
- r = sync_rights(original, passwd);
- if (r < 0)
- goto finish;
-
- errno = 0;
- while ((pw = fgetpwent(original))) {
-
- i = hashmap_get(users, pw->pw_name);
- if (i && i->todo_user) {
- r = -EEXIST;
- goto finish;
- }
-
- if (hashmap_contains(todo_uids, UID_TO_PTR(pw->pw_uid))) {
- r = -EEXIST;
- goto finish;
- }
-
- errno = 0;
- if (putpwent(pw, passwd) < 0) {
- r = errno ? -errno : -EIO;
- goto finish;
- }
-
- errno = 0;
- }
- if (!IN_SET(errno, 0, ENOENT)) {
- r = -errno;
- goto finish;
- }
-
- } else if (errno != ENOENT) {
- r = -errno;
- goto finish;
- } else if (fchmod(fileno(passwd), 0644) < 0) {
- r = -errno;
- goto finish;
- }
-
- HASHMAP_FOREACH(i, todo_uids, iterator) {
- struct passwd n = {
- .pw_name = i->name,
- .pw_uid = i->uid,
- .pw_gid = i->gid,
- .pw_gecos = i->description,
-
- /* "x" means the password is stored in
- * the shadow file */
- .pw_passwd = (char*) "x",
-
- /* We default to the root directory as home */
- .pw_dir = i->home ? i->home : (char*) "/",
-
- /* Initialize the shell to nologin,
- * with one exception: for root we
- * patch in something special */
- .pw_shell = i->uid == 0 ? (char*) "/bin/sh" : (char*) "/sbin/nologin",
- };
-
- errno = 0;
- if (putpwent(&n, passwd) != 0) {
- r = errno ? -errno : -EIO;
- goto finish;
- }
- }
-
- r = fflush_and_check(passwd);
- if (r < 0)
- goto finish;
-
- if (original) {
- fclose(original);
- original = NULL;
- }
-
- /* The we update the shadow database */
- shadow_path = fix_root("/etc/shadow");
- r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp);
- if (r < 0)
- goto finish;
-
- lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY);
-
- original = fopen(shadow_path, "re");
- if (original) {
- struct spwd *sp;
-
- r = sync_rights(original, shadow);
- if (r < 0)
- goto finish;
-
- errno = 0;
- while ((sp = fgetspent(original))) {
-
- i = hashmap_get(users, sp->sp_namp);
- if (i && i->todo_user) {
- /* we will update the existing entry */
- sp->sp_lstchg = lstchg;
-
- /* only the /etc/shadow stage is left, so we can
- * safely remove the item from the todo set */
- i->todo_user = false;
- hashmap_remove(todo_uids, UID_TO_PTR(i->uid));
- }
-
- errno = 0;
- if (putspent(sp, shadow) < 0) {
- r = errno ? -errno : -EIO;
- goto finish;
- }
-
- errno = 0;
- }
- if (!IN_SET(errno, 0, ENOENT)) {
- r = -errno;
- goto finish;
- }
- } else if (errno != ENOENT) {
- r = -errno;
- goto finish;
- } else if (fchmod(fileno(shadow), 0000) < 0) {
- r = -errno;
- goto finish;
- }
-
- HASHMAP_FOREACH(i, todo_uids, iterator) {
- struct spwd n = {
- .sp_namp = i->name,
- .sp_pwdp = (char*) "!!",
- .sp_lstchg = lstchg,
- .sp_min = -1,
- .sp_max = -1,
- .sp_warn = -1,
- .sp_inact = -1,
- .sp_expire = -1,
- .sp_flag = (unsigned long) -1, /* this appears to be what everybody does ... */
- };
-
- errno = 0;
- if (putspent(&n, shadow) != 0) {
- r = errno ? -errno : -EIO;
- goto finish;
- }
- }
-
- r = fflush_and_check(shadow);
- if (r < 0)
- goto finish;
- }
-
- /* Make a backup of the old files */
- if (group_changed) {
- if (group) {
- r = make_backup("/etc/group", group_path);
- if (r < 0)
- goto finish;
- }
- if (gshadow) {
- r = make_backup("/etc/gshadow", gshadow_path);
- if (r < 0)
- goto finish;
- }
- }
-
- if (passwd) {
- r = make_backup("/etc/passwd", passwd_path);
- if (r < 0)
- goto finish;
- }
- if (shadow) {
- r = make_backup("/etc/shadow", shadow_path);
- if (r < 0)
- goto finish;
- }
-
- /* And make the new files count */
- if (group_changed) {
- if (group) {
- if (rename(group_tmp, group_path) < 0) {
- r = -errno;
- goto finish;
- }
-
- free(group_tmp);
- group_tmp = NULL;
- }
- if (gshadow) {
- if (rename(gshadow_tmp, gshadow_path) < 0) {
- r = -errno;
- goto finish;
- }
-
- free(gshadow_tmp);
- gshadow_tmp = NULL;
- }
- }
-
- if (passwd) {
- if (rename(passwd_tmp, passwd_path) < 0) {
- r = -errno;
- goto finish;
- }
-
- free(passwd_tmp);
- passwd_tmp = NULL;
- }
- if (shadow) {
- if (rename(shadow_tmp, shadow_path) < 0) {
- r = -errno;
- goto finish;
- }
-
- free(shadow_tmp);
- shadow_tmp = NULL;
- }
-
- r = 0;
-
-finish:
- if (passwd_tmp)
- unlink(passwd_tmp);
- if (shadow_tmp)
- unlink(shadow_tmp);
- if (group_tmp)
- unlink(group_tmp);
- if (gshadow_tmp)
- unlink(gshadow_tmp);
-
- return r;
-}
-
-static int uid_is_ok(uid_t uid, const char *name) {
- struct passwd *p;
- struct group *g;
- const char *n;
- Item *i;
-
- /* Let's see if we already have assigned the UID a second time */
- if (hashmap_get(todo_uids, UID_TO_PTR(uid)))
- return 0;
-
- /* Try to avoid using uids that are already used by a group
- * that doesn't have the same name as our new user. */
- i = hashmap_get(todo_gids, GID_TO_PTR(uid));
- if (i && !streq(i->name, name))
- return 0;
-
- /* Let's check the files directly */
- if (hashmap_contains(database_uid, UID_TO_PTR(uid)))
- return 0;
-
- n = hashmap_get(database_gid, GID_TO_PTR(uid));
- if (n && !streq(n, name))
- return 0;
-
- /* Let's also check via NSS, to avoid UID clashes over LDAP and such, just in case */
- if (!arg_root) {
- errno = 0;
- p = getpwuid(uid);
- if (p)
- return 0;
- if (!IN_SET(errno, 0, ENOENT))
- return -errno;
-
- errno = 0;
- g = getgrgid((gid_t) uid);
- if (g) {
- if (!streq(g->gr_name, name))
- return 0;
- } else if (!IN_SET(errno, 0, ENOENT))
- return -errno;
- }
-
- return 1;
-}
-
-static int root_stat(const char *p, struct stat *st) {
- const char *fix;
-
- fix = fix_root(p);
- if (stat(fix, st) < 0)
- return -errno;
-
- return 0;
-}
-
-static int read_id_from_file(Item *i, uid_t *_uid, gid_t *_gid) {
- struct stat st;
- bool found_uid = false, found_gid = false;
- uid_t uid = 0;
- gid_t gid = 0;
-
- assert(i);
-
- /* First, try to get the gid directly */
- if (_gid && i->gid_path && root_stat(i->gid_path, &st) >= 0) {
- gid = st.st_gid;
- found_gid = true;
- }
-
- /* Then, try to get the uid directly */
- if ((_uid || (_gid && !found_gid))
- && i->uid_path
- && root_stat(i->uid_path, &st) >= 0) {
-
- uid = st.st_uid;
- found_uid = true;
-
- /* If we need the gid, but had no success yet, also derive it from the uid path */
- if (_gid && !found_gid) {
- gid = st.st_gid;
- found_gid = true;
- }
- }
-
- /* If that didn't work yet, then let's reuse the gid as uid */
- if (_uid && !found_uid && i->gid_path) {
-
- if (found_gid) {
- uid = (uid_t) gid;
- found_uid = true;
- } else if (root_stat(i->gid_path, &st) >= 0) {
- uid = (uid_t) st.st_gid;
- found_uid = true;
- }
- }
-
- if (_uid) {
- if (!found_uid)
- return 0;
-
- *_uid = uid;
- }
-
- if (_gid) {
- if (!found_gid)
- return 0;
-
- *_gid = gid;
- }
-
- return 1;
-}
-
-static int add_user(Item *i) {
- void *z;
- int r;
-
- assert(i);
-
- /* Check the database directly */
- z = hashmap_get(database_user, i->name);
- if (z) {
- log_debug("User %s already exists.", i->name);
- i->uid = PTR_TO_UID(z);
- i->uid_set = true;
- return 0;
- }
-
- if (!arg_root) {
- struct passwd *p;
-
- /* Also check NSS */
- errno = 0;
- p = getpwnam(i->name);
- if (p) {
- log_debug("User %s already exists.", i->name);
- i->uid = p->pw_uid;
- i->uid_set = true;
-
- free(i->description);
- i->description = strdup(p->pw_gecos);
- return 0;
- }
- if (!IN_SET(errno, 0, ENOENT))
- return log_error_errno(errno, "Failed to check if user %s already exists: %m", i->name);
- }
-
- /* Try to use the suggested numeric uid */
- if (i->uid_set) {
- r = uid_is_ok(i->uid, i->name);
- if (r < 0)
- return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
- if (r == 0) {
- log_debug("Suggested user ID " UID_FMT " for %s already used.", i->uid, i->name);
- i->uid_set = false;
- }
- }
-
- /* If that didn't work, try to read it from the specified path */
- if (!i->uid_set) {
- uid_t c;
-
- if (read_id_from_file(i, &c, NULL) > 0) {
-
- if (c <= 0 || !uid_range_contains(uid_range, n_uid_range, c))
- log_debug("User ID " UID_FMT " of file not suitable for %s.", c, i->name);
- else {
- r = uid_is_ok(c, i->name);
- if (r < 0)
- return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
- else if (r > 0) {
- i->uid = c;
- i->uid_set = true;
- } else
- log_debug("User ID " UID_FMT " of file for %s is already used.", c, i->name);
- }
- }
- }
-
- /* Otherwise try to reuse the group ID */
- if (!i->uid_set && i->gid_set) {
- r = uid_is_ok((uid_t) i->gid, i->name);
- if (r < 0)
- return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
- if (r > 0) {
- i->uid = (uid_t) i->gid;
- i->uid_set = true;
- }
- }
-
- /* And if that didn't work either, let's try to find a free one */
- if (!i->uid_set) {
- for (;;) {
- r = uid_range_next_lower(uid_range, n_uid_range, &search_uid);
- if (r < 0) {
- log_error("No free user ID available for %s.", i->name);
- return r;
- }
-
- r = uid_is_ok(search_uid, i->name);
- if (r < 0)
- return log_error_errno(r, "Failed to verify uid " UID_FMT ": %m", i->uid);
- else if (r > 0)
- break;
- }
-
- i->uid_set = true;
- i->uid = search_uid;
- }
-
- r = hashmap_ensure_allocated(&todo_uids, NULL);
- if (r < 0)
- return log_oom();
-
- r = hashmap_put(todo_uids, UID_TO_PTR(i->uid), i);
- if (r < 0)
- return log_oom();
-
- i->todo_user = true;
- log_info("Creating user %s (%s) with uid " UID_FMT " and gid " GID_FMT ".", i->name, strna(i->description), i->uid, i->gid);
-
- return 0;
-}
-
-static int gid_is_ok(gid_t gid) {
- struct group *g;
- struct passwd *p;
-
- if (hashmap_get(todo_gids, GID_TO_PTR(gid)))
- return 0;
-
- /* Avoid reusing gids that are already used by a different user */
- if (hashmap_get(todo_uids, UID_TO_PTR(gid)))
- return 0;
-
- if (hashmap_contains(database_gid, GID_TO_PTR(gid)))
- return 0;
-
- if (hashmap_contains(database_uid, UID_TO_PTR(gid)))
- return 0;
-
- if (!arg_root) {
- errno = 0;
- g = getgrgid(gid);
- if (g)
- return 0;
- if (!IN_SET(errno, 0, ENOENT))
- return -errno;
-
- errno = 0;
- p = getpwuid((uid_t) gid);
- if (p)
- return 0;
- if (!IN_SET(errno, 0, ENOENT))
- return -errno;
- }
-
- return 1;
-}
-
-static int add_group(Item *i) {
- void *z;
- int r;
-
- assert(i);
-
- /* Check the database directly */
- z = hashmap_get(database_group, i->name);
- if (z) {
- log_debug("Group %s already exists.", i->name);
- i->gid = PTR_TO_GID(z);
- i->gid_set = true;
- return 0;
- }
-
- /* Also check NSS */
- if (!arg_root) {
- struct group *g;
-
- errno = 0;
- g = getgrnam(i->name);
- if (g) {
- log_debug("Group %s already exists.", i->name);
- i->gid = g->gr_gid;
- i->gid_set = true;
- return 0;
- }
- if (!IN_SET(errno, 0, ENOENT))
- return log_error_errno(errno, "Failed to check if group %s already exists: %m", i->name);
- }
-
- /* Try to use the suggested numeric gid */
- if (i->gid_set) {
- r = gid_is_ok(i->gid);
- if (r < 0)
- return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
- if (r == 0) {
- log_debug("Suggested group ID " GID_FMT " for %s already used.", i->gid, i->name);
- i->gid_set = false;
- }
- }
-
- /* Try to reuse the numeric uid, if there's one */
- if (!i->gid_set && i->uid_set) {
- r = gid_is_ok((gid_t) i->uid);
- if (r < 0)
- return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
- if (r > 0) {
- i->gid = (gid_t) i->uid;
- i->gid_set = true;
- }
- }
-
- /* If that didn't work, try to read it from the specified path */
- if (!i->gid_set) {
- gid_t c;
-
- if (read_id_from_file(i, NULL, &c) > 0) {
-
- if (c <= 0 || !uid_range_contains(uid_range, n_uid_range, c))
- log_debug("Group ID " GID_FMT " of file not suitable for %s.", c, i->name);
- else {
- r = gid_is_ok(c);
- if (r < 0)
- return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
- else if (r > 0) {
- i->gid = c;
- i->gid_set = true;
- } else
- log_debug("Group ID " GID_FMT " of file for %s already used.", c, i->name);
- }
- }
- }
-
- /* And if that didn't work either, let's try to find a free one */
- if (!i->gid_set) {
- for (;;) {
- /* We look for new GIDs in the UID pool! */
- r = uid_range_next_lower(uid_range, n_uid_range, &search_uid);
- if (r < 0) {
- log_error("No free group ID available for %s.", i->name);
- return r;
- }
-
- r = gid_is_ok(search_uid);
- if (r < 0)
- return log_error_errno(r, "Failed to verify gid " GID_FMT ": %m", i->gid);
- else if (r > 0)
- break;
- }
-
- i->gid_set = true;
- i->gid = search_uid;
- }
-
- r = hashmap_ensure_allocated(&todo_gids, NULL);
- if (r < 0)
- return log_oom();
-
- r = hashmap_put(todo_gids, GID_TO_PTR(i->gid), i);
- if (r < 0)
- return log_oom();
-
- i->todo_group = true;
- log_info("Creating group %s with gid " GID_FMT ".", i->name, i->gid);
-
- return 0;
-}
-
-static int process_item(Item *i) {
- int r;
-
- assert(i);
-
- switch (i->type) {
-
- case ADD_USER:
- r = add_group(i);
- if (r < 0)
- return r;
-
- return add_user(i);
-
- case ADD_GROUP: {
- Item *j;
-
- j = hashmap_get(users, i->name);
- if (j) {
- /* There's already user to be created for this
- * name, let's process that in one step */
-
- if (i->gid_set) {
- j->gid = i->gid;
- j->gid_set = true;
- }
-
- if (i->gid_path) {
- free(j->gid_path);
- j->gid_path = strdup(i->gid_path);
- if (!j->gid_path)
- return log_oom();
- }
-
- return 0;
- }
-
- return add_group(i);
- }
-
- default:
- assert_not_reached("Unknown item type");
- }
-}
-
-static void item_free(Item *i) {
-
- if (!i)
- return;
-
- free(i->name);
- free(i->uid_path);
- free(i->gid_path);
- free(i->description);
- free(i);
-}
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(Item*, item_free);
-
-static int add_implicit(void) {
- char *g, **l;
- Iterator iterator;
- int r;
-
- /* Implicitly create additional users and groups, if they were listed in "m" lines */
-
- HASHMAP_FOREACH_KEY(l, g, members, iterator) {
- Item *i;
- char **m;
-
- i = hashmap_get(groups, g);
- if (!i) {
- _cleanup_(item_freep) Item *j = NULL;
-
- r = hashmap_ensure_allocated(&groups, &string_hash_ops);
- if (r < 0)
- return log_oom();
-
- j = new0(Item, 1);
- if (!j)
- return log_oom();
-
- j->type = ADD_GROUP;
- j->name = strdup(g);
- if (!j->name)
- return log_oom();
-
- r = hashmap_put(groups, j->name, j);
- if (r < 0)
- return log_oom();
-
- log_debug("Adding implicit group '%s' due to m line", j->name);
- j = NULL;
- }
-
- STRV_FOREACH(m, l) {
-
- i = hashmap_get(users, *m);
- if (!i) {
- _cleanup_(item_freep) Item *j = NULL;
-
- r = hashmap_ensure_allocated(&users, &string_hash_ops);
- if (r < 0)
- return log_oom();
-
- j = new0(Item, 1);
- if (!j)
- return log_oom();
-
- j->type = ADD_USER;
- j->name = strdup(*m);
- if (!j->name)
- return log_oom();
-
- r = hashmap_put(users, j->name, j);
- if (r < 0)
- return log_oom();
-
- log_debug("Adding implicit user '%s' due to m line", j->name);
- j = NULL;
- }
- }
- }
-
- return 0;
-}
-
-static bool item_equal(Item *a, Item *b) {
- assert(a);
- assert(b);
-
- if (a->type != b->type)
- return false;
-
- if (!streq_ptr(a->name, b->name))
- return false;
-
- if (!streq_ptr(a->uid_path, b->uid_path))
- return false;
-
- if (!streq_ptr(a->gid_path, b->gid_path))
- return false;
-
- if (!streq_ptr(a->description, b->description))
- return false;
-
- if (a->uid_set != b->uid_set)
- return false;
-
- if (a->uid_set && a->uid != b->uid)
- return false;
-
- if (a->gid_set != b->gid_set)
- return false;
-
- if (a->gid_set && a->gid != b->gid)
- return false;
-
- if (!streq_ptr(a->home, b->home))
- return false;
-
- return true;
-}
-
-static bool valid_user_group_name(const char *u) {
- const char *i;
- long sz;
-
- if (isempty(u))
- return false;
-
- if (!(u[0] >= 'a' && u[0] <= 'z') &&
- !(u[0] >= 'A' && u[0] <= 'Z') &&
- u[0] != '_')
- return false;
-
- for (i = u+1; *i; i++) {
- if (!(*i >= 'a' && *i <= 'z') &&
- !(*i >= 'A' && *i <= 'Z') &&
- !(*i >= '0' && *i <= '9') &&
- *i != '_' &&
- *i != '-')
- return false;
- }
-
- sz = sysconf(_SC_LOGIN_NAME_MAX);
- assert_se(sz > 0);
-
- if ((size_t) (i-u) > (size_t) sz)
- return false;
-
- if ((size_t) (i-u) > UT_NAMESIZE - 1)
- return false;
-
- return true;
-}
-
-static bool valid_gecos(const char *d) {
-
- if (!d)
- return false;
-
- if (!utf8_is_valid(d))
- return false;
-
- if (string_has_cc(d, NULL))
- return false;
-
- /* Colons are used as field separators, and hence not OK */
- if (strchr(d, ':'))
- return false;
-
- return true;
-}
-
-static bool valid_home(const char *p) {
-
- if (isempty(p))
- return false;
-
- if (!utf8_is_valid(p))
- return false;
-
- if (string_has_cc(p, NULL))
- return false;
-
- if (!path_is_absolute(p))
- return false;
-
- if (!path_is_safe(p))
- return false;
-
- /* Colons are used as field separators, and hence not OK */
- if (strchr(p, ':'))
- return false;
-
- return true;
-}
-
-static int parse_line(const char *fname, unsigned line, const char *buffer) {
-
- static const Specifier specifier_table[] = {
- { 'm', specifier_machine_id, NULL },
- { 'b', specifier_boot_id, NULL },
- { 'H', specifier_host_name, NULL },
- { 'v', specifier_kernel_release, NULL },
- {}
- };
-
- _cleanup_free_ char *action = NULL, *name = NULL, *id = NULL, *resolved_name = NULL, *resolved_id = NULL, *description = NULL, *home = NULL;
- _cleanup_(item_freep) Item *i = NULL;
- Item *existing;
- Hashmap *h;
- int r;
- const char *p;
-
- assert(fname);
- assert(line >= 1);
- assert(buffer);
-
- /* Parse columns */
- p = buffer;
- r = unquote_many_words(&p, 0, &action, &name, &id, &description, &home, NULL);
- if (r < 0) {
- log_error("[%s:%u] Syntax error.", fname, line);
- return r;
- }
- if (r < 2) {
- log_error("[%s:%u] Missing action and name columns.", fname, line);
- return -EINVAL;
- }
- if (*p != 0) {
- log_error("[%s:%u] Trailing garbage.", fname, line);
- return -EINVAL;
- }
-
- /* Verify action */
- if (strlen(action) != 1) {
- log_error("[%s:%u] Unknown modifier '%s'", fname, line, action);
- return -EINVAL;
- }
-
- if (!IN_SET(action[0], ADD_USER, ADD_GROUP, ADD_MEMBER, ADD_RANGE)) {
- log_error("[%s:%u] Unknown command command type '%c'.", fname, line, action[0]);
- return -EBADMSG;
- }
-
- /* Verify name */
- if (isempty(name) || streq(name, "-")) {
- free(name);
- name = NULL;
- }
-
- if (name) {
- r = specifier_printf(name, specifier_table, NULL, &resolved_name);
- if (r < 0) {
- log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, name);
- return r;
- }
-
- if (!valid_user_group_name(resolved_name)) {
- log_error("[%s:%u] '%s' is not a valid user or group name.", fname, line, resolved_name);
- return -EINVAL;
- }
- }
-
- /* Verify id */
- if (isempty(id) || streq(id, "-")) {
- free(id);
- id = NULL;
- }
-
- if (id) {
- r = specifier_printf(id, specifier_table, NULL, &resolved_id);
- if (r < 0) {
- log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, name);
- return r;
- }
- }
-
- /* Verify description */
- if (isempty(description) || streq(description, "-")) {
- free(description);
- description = NULL;
- }
-
- if (description) {
- if (!valid_gecos(description)) {
- log_error("[%s:%u] '%s' is not a valid GECOS field.", fname, line, description);
- return -EINVAL;
- }
- }
-
- /* Verify home */
- if (isempty(home) || streq(home, "-")) {
- free(home);
- home = NULL;
- }
-
- if (home) {
- if (!valid_home(home)) {
- log_error("[%s:%u] '%s' is not a valid home directory field.", fname, line, home);
- return -EINVAL;
- }
- }
-
- switch (action[0]) {
-
- case ADD_RANGE:
- if (resolved_name) {
- log_error("[%s:%u] Lines of type 'r' don't take a name field.", fname, line);
- return -EINVAL;
- }
-
- if (!resolved_id) {
- log_error("[%s:%u] Lines of type 'r' require a ID range in the third field.", fname, line);
- return -EINVAL;
- }
-
- if (description) {
- log_error("[%s:%u] Lines of type 'r' don't take a GECOS field.", fname, line);
- return -EINVAL;
- }
-
- if (home) {
- log_error("[%s:%u] Lines of type 'r' don't take a home directory field.", fname, line);
- return -EINVAL;
- }
-
- r = uid_range_add_str(&uid_range, &n_uid_range, resolved_id);
- if (r < 0) {
- log_error("[%s:%u] Invalid UID range %s.", fname, line, resolved_id);
- return -EINVAL;
- }
-
- return 0;
-
- case ADD_MEMBER: {
- char **l;
-
- /* Try to extend an existing member or group item */
- if (!name) {
- log_error("[%s:%u] Lines of type 'm' require a user name in the second field.", fname, line);
- return -EINVAL;
- }
-
- if (!resolved_id) {
- log_error("[%s:%u] Lines of type 'm' require a group name in the third field.", fname, line);
- return -EINVAL;
- }
-
- if (!valid_user_group_name(resolved_id)) {
- log_error("[%s:%u] '%s' is not a valid user or group name.", fname, line, resolved_id);
- return -EINVAL;
- }
-
- if (description) {
- log_error("[%s:%u] Lines of type 'm' don't take a GECOS field.", fname, line);
- return -EINVAL;
- }
-
- if (home) {
- log_error("[%s:%u] Lines of type 'm' don't take a home directory field.", fname, line);
- return -EINVAL;
- }
-
- r = hashmap_ensure_allocated(&members, &string_hash_ops);
- if (r < 0)
- return log_oom();
-
- l = hashmap_get(members, resolved_id);
- if (l) {
- /* A list for this group name already exists, let's append to it */
- r = strv_push(&l, resolved_name);
- if (r < 0)
- return log_oom();
-
- resolved_name = NULL;
-
- assert_se(hashmap_update(members, resolved_id, l) >= 0);
- } else {
- /* No list for this group name exists yet, create one */
-
- l = new0(char *, 2);
- if (!l)
- return -ENOMEM;
-
- l[0] = resolved_name;
- l[1] = NULL;
-
- r = hashmap_put(members, resolved_id, l);
- if (r < 0) {
- free(l);
- return log_oom();
- }
-
- resolved_id = resolved_name = NULL;
- }
-
- return 0;
- }
-
- case ADD_USER:
- if (!name) {
- log_error("[%s:%u] Lines of type 'u' require a user name in the second field.", fname, line);
- return -EINVAL;
- }
-
- r = hashmap_ensure_allocated(&users, &string_hash_ops);
- if (r < 0)
- return log_oom();
-
- i = new0(Item, 1);
- if (!i)
- return log_oom();
-
- if (resolved_id) {
- if (path_is_absolute(resolved_id)) {
- i->uid_path = resolved_id;
- resolved_id = NULL;
-
- path_kill_slashes(i->uid_path);
- } else {
- r = parse_uid(resolved_id, &i->uid);
- if (r < 0) {
- log_error("Failed to parse UID: %s", id);
- return -EBADMSG;
- }
-
- i->uid_set = true;
- }
- }
-
- i->description = description;
- description = NULL;
-
- i->home = home;
- home = NULL;
-
- h = users;
- break;
-
- case ADD_GROUP:
- if (!name) {
- log_error("[%s:%u] Lines of type 'g' require a user name in the second field.", fname, line);
- return -EINVAL;
- }
-
- if (description) {
- log_error("[%s:%u] Lines of type 'g' don't take a GECOS field.", fname, line);
- return -EINVAL;
- }
-
- if (home) {
- log_error("[%s:%u] Lines of type 'g' don't take a home directory field.", fname, line);
- return -EINVAL;
- }
-
- r = hashmap_ensure_allocated(&groups, &string_hash_ops);
- if (r < 0)
- return log_oom();
-
- i = new0(Item, 1);
- if (!i)
- return log_oom();
-
- if (resolved_id) {
- if (path_is_absolute(resolved_id)) {
- i->gid_path = resolved_id;
- resolved_id = NULL;
-
- path_kill_slashes(i->gid_path);
- } else {
- r = parse_gid(resolved_id, &i->gid);
- if (r < 0) {
- log_error("Failed to parse GID: %s", id);
- return -EBADMSG;
- }
-
- i->gid_set = true;
- }
- }
-
- h = groups;
- break;
-
- default:
- return -EBADMSG;
- }
-
- i->type = action[0];
- i->name = resolved_name;
- resolved_name = NULL;
-
- existing = hashmap_get(h, i->name);
- if (existing) {
-
- /* Two identical items are fine */
- if (!item_equal(existing, i))
- log_warning("Two or more conflicting lines for %s configured, ignoring.", i->name);
-
- return 0;
- }
-
- r = hashmap_put(h, i->name, i);
- if (r < 0)
- return log_oom();
-
- i = NULL;
- return 0;
-}
-
-static int read_config_file(const char *fn, bool ignore_enoent) {
- _cleanup_fclose_ FILE *rf = NULL;
- FILE *f = NULL;
- char line[LINE_MAX];
- unsigned v = 0;
- int r = 0;
-
- assert(fn);
-
- if (streq(fn, "-"))
- f = stdin;
- else {
- r = search_and_fopen_nulstr(fn, "re", arg_root, conf_file_dirs, &rf);
- if (r < 0) {
- if (ignore_enoent && r == -ENOENT)
- return 0;
-
- return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn);
- }
-
- f = rf;
- }
-
- FOREACH_LINE(line, f, break) {
- char *l;
- int k;
-
- v++;
-
- l = strstrip(line);
- if (*l == '#' || *l == 0)
- continue;
-
- k = parse_line(fn, v, l);
- if (k < 0 && r == 0)
- r = k;
- }
-
- if (ferror(f)) {
- log_error_errno(errno, "Failed to read from file %s: %m", fn);
- if (r == 0)
- r = -EIO;
- }
-
- return r;
-}
-
-static void free_database(Hashmap *by_name, Hashmap *by_id) {
- char *name;
-
- for (;;) {
- name = hashmap_first(by_id);
- if (!name)
- break;
-
- hashmap_remove(by_name, name);
-
- hashmap_steal_first_key(by_id);
- free(name);
- }
-
- while ((name = hashmap_steal_first_key(by_name)))
- free(name);
-
- hashmap_free(by_name);
- hashmap_free(by_id);
-}
-
-static void help(void) {
- printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
- "Creates system user accounts.\n\n"
- " -h --help Show this help\n"
- " --version Show package version\n"
- " --root=PATH Operate on an alternate filesystem root\n"
- , program_invocation_short_name);
-}
-
-static int parse_argv(int argc, char *argv[]) {
-
- enum {
- ARG_VERSION = 0x100,
- ARG_ROOT,
- };
-
- static const struct option options[] = {
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, ARG_VERSION },
- { "root", required_argument, NULL, ARG_ROOT },
- {}
- };
-
- int c;
-
- assert(argc >= 0);
- assert(argv);
-
- while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
-
- switch (c) {
-
- case 'h':
- help();
- return 0;
-
- case ARG_VERSION:
- puts(PACKAGE_STRING);
- puts(SYSTEMD_FEATURES);
- return 0;
-
- case ARG_ROOT:
- free(arg_root);
- arg_root = path_make_absolute_cwd(optarg);
- if (!arg_root)
- return log_oom();
-
- path_kill_slashes(arg_root);
- break;
-
- case '?':
- return -EINVAL;
-
- default:
- assert_not_reached("Unhandled option");
- }
-
- return 1;
-}
-
-int main(int argc, char *argv[]) {
-
- _cleanup_close_ int lock = -1;
- Iterator iterator;
- int r, k;
- Item *i;
- char *n;
-
- r = parse_argv(argc, argv);
- if (r <= 0)
- goto finish;
-
- log_set_target(LOG_TARGET_AUTO);
- log_parse_environment();
- log_open();
-
- umask(0022);
-
- r = mac_selinux_init(NULL);
- if (r < 0) {
- log_error_errno(r, "SELinux setup failed: %m");
- goto finish;
- }
-
- if (optind < argc) {
- int j;
-
- for (j = optind; j < argc; j++) {
- k = read_config_file(argv[j], false);
- if (k < 0 && r == 0)
- r = k;
- }
- } else {
- _cleanup_strv_free_ char **files = NULL;
- char **f;
-
- r = conf_files_list_nulstr(&files, ".conf", arg_root, conf_file_dirs);
- if (r < 0) {
- log_error_errno(r, "Failed to enumerate sysusers.d files: %m");
- goto finish;
- }
-
- STRV_FOREACH(f, files) {
- k = read_config_file(*f, true);
- if (k < 0 && r == 0)
- r = k;
- }
- }
-
- if (!uid_range) {
- /* Default to default range of 1..SYSTEMD_UID_MAX */
- r = uid_range_add(&uid_range, &n_uid_range, 1, SYSTEM_UID_MAX);
- if (r < 0) {
- log_oom();
- goto finish;
- }
- }
-
- r = add_implicit();
- if (r < 0)
- goto finish;
-
- lock = take_password_lock(arg_root);
- if (lock < 0) {
- log_error_errno(lock, "Failed to take lock: %m");
- goto finish;
- }
-
- r = load_user_database();
- if (r < 0) {
- log_error_errno(r, "Failed to load user database: %m");
- goto finish;
- }
-
- r = load_group_database();
- if (r < 0) {
- log_error_errno(r, "Failed to read group database: %m");
- goto finish;
- }
-
- HASHMAP_FOREACH(i, groups, iterator)
- process_item(i);
-
- HASHMAP_FOREACH(i, users, iterator)
- process_item(i);
-
- r = write_files();
- if (r < 0)
- log_error_errno(r, "Failed to write files: %m");
-
-finish:
- while ((i = hashmap_steal_first(groups)))
- item_free(i);
-
- while ((i = hashmap_steal_first(users)))
- item_free(i);
-
- while ((n = hashmap_first_key(members))) {
- strv_free(hashmap_steal_first(members));
- free(n);
- }
-
- hashmap_free(groups);
- hashmap_free(users);
- hashmap_free(members);
- hashmap_free(todo_uids);
- hashmap_free(todo_gids);
-
- free_database(database_user, database_uid);
- free_database(database_group, database_gid);
-
- free(arg_root);
-
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
-}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-29 18:40:16 +0000