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-rw-r--r--src/sysusers/sysusers.c2202
1 files changed, 2202 insertions, 0 deletions
diff --git a/src/sysusers/sysusers.c b/src/sysusers/sysusers.c
new file mode 100644
index 0000000..7f45b70
--- /dev/null
+++ b/src/sysusers/sysusers.c
@@ -0,0 +1,2202 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <getopt.h>
+#include <utmp.h>
+
+#include "alloc-util.h"
+#include "chase-symlinks.h"
+#include "conf-files.h"
+#include "copy.h"
+#include "creds-util.h"
+#include "def.h"
+#include "dissect-image.h"
+#include "env-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "format-util.h"
+#include "fs-util.h"
+#include "hashmap.h"
+#include "libcrypt-util.h"
+#include "main-func.h"
+#include "memory-util.h"
+#include "mount-util.h"
+#include "nscd-flush.h"
+#include "pager.h"
+#include "parse-argument.h"
+#include "path-util.h"
+#include "pretty-print.h"
+#include "selinux-util.h"
+#include "set.h"
+#include "smack-util.h"
+#include "specifier.h"
+#include "stat-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "sync-util.h"
+#include "tmpfile-util-label.h"
+#include "uid-alloc-range.h"
+#include "uid-range.h"
+#include "user-util.h"
+#include "utf8.h"
+#include "util.h"
+
+typedef enum ItemType {
+ ADD_USER = 'u',
+ ADD_GROUP = 'g',
+ ADD_MEMBER = 'm',
+ ADD_RANGE = 'r',
+} ItemType;
+
+static inline const char* item_type_to_string(ItemType t) {
+ switch (t) {
+ case ADD_USER:
+ return "user";
+ case ADD_GROUP:
+ return "group";
+ case ADD_MEMBER:
+ return "member";
+ case ADD_RANGE:
+ return "range";
+ default:
+ assert_not_reached();
+ }
+}
+
+typedef struct Item {
+ ItemType type;
+
+ char *name;
+ char *group_name;
+ char *uid_path;
+ char *gid_path;
+ char *description;
+ char *home;
+ char *shell;
+
+ gid_t gid;
+ uid_t uid;
+
+ bool gid_set:1;
+
+ /* When set the group with the specified GID must exist
+ * and the check if a UID clashes with the GID is skipped.
+ */
+ bool id_set_strict:1;
+
+ bool uid_set:1;
+
+ bool todo_user:1;
+ bool todo_group:1;
+} Item;
+
+static char *arg_root = NULL;
+static char *arg_image = NULL;
+static bool arg_cat_config = false;
+static const char *arg_replace = NULL;
+static bool arg_dry_run = false;
+static bool arg_inline = false;
+static PagerFlags arg_pager_flags = 0;
+
+static OrderedHashmap *users = NULL, *groups = NULL;
+static OrderedHashmap *todo_uids = NULL, *todo_gids = NULL;
+static OrderedHashmap *members = NULL;
+
+static Hashmap *database_by_uid = NULL, *database_by_username = NULL;
+static Hashmap *database_by_gid = NULL, *database_by_groupname = NULL;
+static Set *database_users = NULL, *database_groups = NULL;
+
+static uid_t search_uid = UID_INVALID;
+static UidRange *uid_range = NULL;
+
+static UGIDAllocationRange login_defs = {};
+static bool login_defs_need_warning = false;
+
+STATIC_DESTRUCTOR_REGISTER(groups, ordered_hashmap_freep);
+STATIC_DESTRUCTOR_REGISTER(users, ordered_hashmap_freep);
+STATIC_DESTRUCTOR_REGISTER(members, ordered_hashmap_freep);
+STATIC_DESTRUCTOR_REGISTER(todo_uids, ordered_hashmap_freep);
+STATIC_DESTRUCTOR_REGISTER(todo_gids, ordered_hashmap_freep);
+STATIC_DESTRUCTOR_REGISTER(database_by_uid, hashmap_freep);
+STATIC_DESTRUCTOR_REGISTER(database_by_username, hashmap_freep);
+STATIC_DESTRUCTOR_REGISTER(database_users, set_free_freep);
+STATIC_DESTRUCTOR_REGISTER(database_by_gid, hashmap_freep);
+STATIC_DESTRUCTOR_REGISTER(database_by_groupname, hashmap_freep);
+STATIC_DESTRUCTOR_REGISTER(database_groups, set_free_freep);
+STATIC_DESTRUCTOR_REGISTER(uid_range, uid_range_freep);
+STATIC_DESTRUCTOR_REGISTER(arg_root, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_image, freep);
+
+static int errno_is_not_exists(int code) {
+ /* See getpwnam(3) and getgrnam(3): those codes and others can be returned if the user or group are
+ * not found. */
+ return IN_SET(code, 0, ENOENT, ESRCH, EBADF, EPERM);
+}
+
+static void maybe_emit_login_defs_warning(void) {
+ if (!login_defs_need_warning)
+ return;
+
+ if (login_defs.system_alloc_uid_min != SYSTEM_ALLOC_UID_MIN ||
+ login_defs.system_uid_max != SYSTEM_UID_MAX)
+ log_warning("login.defs specifies UID allocation range "UID_FMT"–"UID_FMT
+ " that is different than the built-in defaults ("UID_FMT"–"UID_FMT")",
+ login_defs.system_alloc_uid_min, login_defs.system_uid_max,
+ (uid_t) SYSTEM_ALLOC_UID_MIN, (uid_t) SYSTEM_UID_MAX);
+ if (login_defs.system_alloc_gid_min != SYSTEM_ALLOC_GID_MIN ||
+ login_defs.system_gid_max != SYSTEM_GID_MAX)
+ log_warning("login.defs specifies GID allocation range "GID_FMT"–"GID_FMT
+ " that is different than the built-in defaults ("GID_FMT"–"GID_FMT")",
+ login_defs.system_alloc_gid_min, login_defs.system_gid_max,
+ (gid_t) SYSTEM_ALLOC_GID_MIN, (gid_t) SYSTEM_GID_MAX);
+
+ login_defs_need_warning = false;
+}
+
+static int load_user_database(void) {
+ _cleanup_fclose_ FILE *f = NULL;
+ const char *passwd_path;
+ struct passwd *pw;
+ int r;
+
+ passwd_path = prefix_roota(arg_root, "/etc/passwd");
+ f = fopen(passwd_path, "re");
+ if (!f)
+ return errno == ENOENT ? 0 : -errno;
+
+ r = hashmap_ensure_allocated(&database_by_username, &string_hash_ops);
+ if (r < 0)
+ return r;
+
+ r = hashmap_ensure_allocated(&database_by_uid, NULL);
+ if (r < 0)
+ return r;
+
+ r = set_ensure_allocated(&database_users, NULL);
+ if (r < 0)
+ return r;
+
+ while ((r = fgetpwent_sane(f, &pw)) > 0) {
+ char *n;
+ int k, q;
+
+ n = strdup(pw->pw_name);
+ if (!n)
+ return -ENOMEM;
+
+ k = set_put(database_users, n);
+ if (k < 0) {
+ free(n);
+ return k;
+ }
+
+ k = hashmap_put(database_by_username, n, UID_TO_PTR(pw->pw_uid));
+ if (k < 0 && k != -EEXIST)
+ return k;
+
+ q = hashmap_put(database_by_uid, UID_TO_PTR(pw->pw_uid), n);
+ if (q < 0 && q != -EEXIST)
+ return q;
+ }
+ return r;
+}
+
+static int load_group_database(void) {
+ _cleanup_fclose_ FILE *f = NULL;
+ const char *group_path;
+ struct group *gr;
+ int r;
+
+ group_path = prefix_roota(arg_root, "/etc/group");
+ f = fopen(group_path, "re");
+ if (!f)
+ return errno == ENOENT ? 0 : -errno;
+
+ r = hashmap_ensure_allocated(&database_by_groupname, &string_hash_ops);
+ if (r < 0)
+ return r;
+
+ r = hashmap_ensure_allocated(&database_by_gid, NULL);
+ if (r < 0)
+ return r;
+
+ r = set_ensure_allocated(&database_groups, NULL);
+ if (r < 0)
+ return r;
+
+ while ((r = fgetgrent_sane(f, &gr)) > 0) {
+ char *n;
+ int k, q;
+
+ n = strdup(gr->gr_name);
+ if (!n)
+ return -ENOMEM;
+
+ k = set_put(database_groups, n);
+ if (k < 0) {
+ free(n);
+ return k;
+ }
+
+ k = hashmap_put(database_by_groupname, n, GID_TO_PTR(gr->gr_gid));
+ if (k < 0 && k != -EEXIST)
+ return k;
+
+ q = hashmap_put(database_by_gid, GID_TO_PTR(gr->gr_gid), n);
+ if (q < 0 && q != -EEXIST)
+ return q;
+ }
+ return r;
+}
+
+static int make_backup(const char *target, const char *x) {
+ _cleanup_(unlink_and_freep) char *dst_tmp = NULL;
+ _cleanup_fclose_ FILE *dst = NULL;
+ _cleanup_close_ int src = -1;
+ const char *backup;
+ struct stat st;
+ int r;
+
+ assert(target);
+ assert(x);
+
+ 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, /* The path for which to the look up the label */
+ x, /* Where we want the file actually to end up */
+ &dst, /* The temporary file we write to */
+ &dst_tmp);
+ if (r < 0)
+ return r;
+
+ r = copy_bytes(src, fileno(dst), UINT64_MAX, COPY_REFLINK);
+ if (r < 0)
+ return r;
+
+ backup = strjoina(x, "-");
+
+ /* Copy over the access mask. Don't fail on chmod() or chown(). If it stays owned by us and/or
+ * unreadable by others, then it isn't too bad... */
+ r = fchmod_and_chown_with_fallback(fileno(dst), dst_tmp, st.st_mode & 07777, st.st_uid, st.st_gid);
+ if (r < 0)
+ log_warning_errno(r, "Failed to change access mode or ownership of %s: %m", backup);
+
+ if (futimens(fileno(dst), (const struct timespec[2]) { st.st_atim, st.st_mtim }) < 0)
+ log_warning_errno(errno, "Failed to fix access and modification time of %s: %m", backup);
+
+ r = fsync_full(fileno(dst));
+ if (r < 0)
+ return r;
+
+ if (rename(dst_tmp, backup) < 0)
+ return errno;
+
+ dst_tmp = mfree(dst_tmp); /* disable the unlink_and_freep() hook now that the file has been renamed */
+ return 0;
+}
+
+static int putgrent_with_members(const struct group *gr, FILE *group) {
+ char **a;
+
+ assert(gr);
+ assert(group);
+
+ a = ordered_hashmap_get(members, gr->gr_name);
+ if (a) {
+ _cleanup_strv_free_ char **l = NULL;
+ bool added = false;
+
+ l = strv_copy(gr->gr_mem);
+ if (!l)
+ return -ENOMEM;
+
+ STRV_FOREACH(i, a) {
+ if (strv_contains(l, *i))
+ continue;
+
+ if (strv_extend(&l, *i) < 0)
+ return -ENOMEM;
+
+ added = true;
+ }
+
+ if (added) {
+ struct group t;
+ int r;
+
+ strv_uniq(l);
+ strv_sort(l);
+
+ t = *gr;
+ t.gr_mem = l;
+
+ r = putgrent_sane(&t, group);
+ return r < 0 ? r : 1;
+ }
+ }
+
+ return putgrent_sane(gr, group);
+}
+
+#if ENABLE_GSHADOW
+static int putsgent_with_members(const struct sgrp *sg, FILE *gshadow) {
+ char **a;
+
+ assert(sg);
+ assert(gshadow);
+
+ a = ordered_hashmap_get(members, sg->sg_namp);
+ if (a) {
+ _cleanup_strv_free_ char **l = NULL;
+ bool added = false;
+
+ l = strv_copy(sg->sg_mem);
+ if (!l)
+ return -ENOMEM;
+
+ STRV_FOREACH(i, a) {
+ if (strv_contains(l, *i))
+ continue;
+
+ if (strv_extend(&l, *i) < 0)
+ return -ENOMEM;
+
+ added = true;
+ }
+
+ if (added) {
+ struct sgrp t;
+ int r;
+
+ strv_uniq(l);
+ strv_sort(l);
+
+ t = *sg;
+ t.sg_mem = l;
+
+ r = putsgent_sane(&t, gshadow);
+ return r < 0 ? r : 1;
+ }
+ }
+
+ return putsgent_sane(sg, gshadow);
+}
+#endif
+
+static const char* pick_shell(const Item *i) {
+ if (i->type != ADD_USER)
+ return NULL;
+ if (i->shell)
+ return i->shell;
+ if (i->uid_set && i->uid == 0)
+ return default_root_shell(arg_root);
+ return NOLOGIN;
+}
+
+static int write_temporary_passwd(const char *passwd_path, FILE **ret_tmpfile, char **ret_tmpfile_path) {
+ _cleanup_fclose_ FILE *original = NULL, *passwd = NULL;
+ _cleanup_(unlink_and_freep) char *passwd_tmp = NULL;
+ struct passwd *pw = NULL;
+ Item *i;
+ int r;
+
+ if (ordered_hashmap_isempty(todo_uids))
+ return 0;
+
+ if (arg_dry_run) {
+ log_info("Would write /etc/passwd%s", special_glyph(SPECIAL_GLYPH_ELLIPSIS));
+ return 0;
+ }
+
+ r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to open temporary copy of %s: %m", passwd_path);
+
+ original = fopen(passwd_path, "re");
+ if (original) {
+
+ /* Allow fallback path for when /proc is not mounted. On any normal system /proc will be
+ * mounted, but e.g. when 'dnf --installroot' is used, it might not be. There is no security
+ * relevance here, since the environment is ultimately trusted, and not requiring /proc makes
+ * it easier to depend on sysusers in packaging scripts and suchlike. */
+ r = copy_rights_with_fallback(fileno(original), fileno(passwd), passwd_tmp);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to copy permissions from %s to %s: %m",
+ passwd_path, passwd_tmp);
+
+ while ((r = fgetpwent_sane(original, &pw)) > 0) {
+ i = ordered_hashmap_get(users, pw->pw_name);
+ if (i && i->todo_user)
+ return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
+ "%s: User \"%s\" already exists.",
+ passwd_path, pw->pw_name);
+
+ if (ordered_hashmap_contains(todo_uids, UID_TO_PTR(pw->pw_uid)))
+ return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
+ "%s: Detected collision for UID " UID_FMT ".",
+ passwd_path, pw->pw_uid);
+
+ /* Make sure we keep the NIS entries (if any) at the end. */
+ if (IN_SET(pw->pw_name[0], '+', '-'))
+ break;
+
+ r = putpwent_sane(pw, passwd);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to add existing user \"%s\" to temporary passwd file: %m",
+ pw->pw_name);
+ }
+ if (r < 0)
+ return log_debug_errno(r, "Failed to read %s: %m", passwd_path);
+
+ } else {
+ if (errno != ENOENT)
+ return log_debug_errno(errno, "Failed to open %s: %m", passwd_path);
+ if (fchmod(fileno(passwd), 0644) < 0)
+ return log_debug_errno(errno, "Failed to fchmod %s: %m", passwd_tmp);
+ }
+
+ ORDERED_HASHMAP_FOREACH(i, todo_uids) {
+ _cleanup_free_ char *creds_shell = NULL, *cn = NULL;
+
+ struct passwd n = {
+ .pw_name = i->name,
+ .pw_uid = i->uid,
+ .pw_gid = i->gid,
+ .pw_gecos = (char*) strempty(i->description),
+
+ /* "x" means the password is stored in the shadow file */
+ .pw_passwd = (char*) PASSWORD_SEE_SHADOW,
+
+ /* We default to the root directory as home */
+ .pw_dir = i->home ?: (char*) "/",
+
+ /* Initialize the shell to nologin, with one exception:
+ * for root we patch in something special */
+ .pw_shell = (char*) pick_shell(i),
+ };
+
+ /* Try to pick up the shell for this account via the credentials logic */
+ cn = strjoin("passwd.shell.", i->name);
+ if (!cn)
+ return -ENOMEM;
+
+ r = read_credential(cn, (void**) &creds_shell, NULL);
+ if (r < 0)
+ log_debug_errno(r, "Couldn't read credential '%s', ignoring: %m", cn);
+ else
+ n.pw_shell = creds_shell;
+
+ r = putpwent_sane(&n, passwd);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to add new user \"%s\" to temporary passwd file: %m",
+ i->name);
+ }
+
+ /* Append the remaining NIS entries if any */
+ while (pw) {
+ r = putpwent_sane(pw, passwd);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to add existing user \"%s\" to temporary passwd file: %m",
+ pw->pw_name);
+
+ r = fgetpwent_sane(original, &pw);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to read %s: %m", passwd_path);
+ if (r == 0)
+ break;
+ }
+
+ r = fflush_sync_and_check(passwd);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to flush %s: %m", passwd_tmp);
+
+ *ret_tmpfile = TAKE_PTR(passwd);
+ *ret_tmpfile_path = TAKE_PTR(passwd_tmp);
+
+ return 0;
+}
+
+static usec_t epoch_or_now(void) {
+ uint64_t epoch;
+
+ if (getenv_uint64_secure("SOURCE_DATE_EPOCH", &epoch) >= 0) {
+ if (epoch > UINT64_MAX/USEC_PER_SEC) /* Overflow check */
+ return USEC_INFINITY;
+ return (usec_t) epoch * USEC_PER_SEC;
+ }
+
+ return now(CLOCK_REALTIME);
+}
+
+static int write_temporary_shadow(const char *shadow_path, FILE **ret_tmpfile, char **ret_tmpfile_path) {
+ _cleanup_fclose_ FILE *original = NULL, *shadow = NULL;
+ _cleanup_(unlink_and_freep) char *shadow_tmp = NULL;
+ struct spwd *sp = NULL;
+ long lstchg;
+ Item *i;
+ int r;
+
+ if (ordered_hashmap_isempty(todo_uids))
+ return 0;
+
+ if (arg_dry_run) {
+ log_info("Would write /etc/shadow%s", special_glyph(SPECIAL_GLYPH_ELLIPSIS));
+ return 0;
+ }
+
+ r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to open temporary copy of %s: %m", shadow_path);
+
+ lstchg = (long) (epoch_or_now() / USEC_PER_DAY);
+
+ original = fopen(shadow_path, "re");
+ if (original) {
+
+ r = copy_rights_with_fallback(fileno(original), fileno(shadow), shadow_tmp);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to copy permissions from %s to %s: %m",
+ shadow_path, shadow_tmp);
+
+ while ((r = fgetspent_sane(original, &sp)) > 0) {
+ i = ordered_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;
+ ordered_hashmap_remove(todo_uids, UID_TO_PTR(i->uid));
+ }
+
+ /* Make sure we keep the NIS entries (if any) at the end. */
+ if (IN_SET(sp->sp_namp[0], '+', '-'))
+ break;
+
+ r = putspent_sane(sp, shadow);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to add existing user \"%s\" to temporary shadow file: %m",
+ sp->sp_namp);
+
+ }
+ if (r < 0)
+ return log_debug_errno(r, "Failed to read %s: %m", shadow_path);
+
+ } else {
+ if (errno != ENOENT)
+ return log_debug_errno(errno, "Failed to open %s: %m", shadow_path);
+ if (fchmod(fileno(shadow), 0000) < 0)
+ return log_debug_errno(errno, "Failed to fchmod %s: %m", shadow_tmp);
+ }
+
+ ORDERED_HASHMAP_FOREACH(i, todo_uids) {
+ _cleanup_(erase_and_freep) char *creds_password = NULL;
+ bool is_hashed;
+
+ struct spwd n = {
+ .sp_namp = i->name,
+ .sp_pwdp = (char*) PASSWORD_LOCKED_AND_INVALID,
+ .sp_lstchg = lstchg,
+ .sp_min = -1,
+ .sp_max = -1,
+ .sp_warn = -1,
+ .sp_inact = -1,
+ .sp_expire = -1,
+ .sp_flag = ULONG_MAX, /* this appears to be what everybody does ... */
+ };
+
+ r = get_credential_user_password(i->name, &creds_password, &is_hashed);
+ if (r < 0)
+ log_debug_errno(r, "Couldn't read password credential for user '%s', ignoring: %m", i->name);
+
+ if (creds_password && !is_hashed) {
+ _cleanup_(erase_and_freep) char* plaintext_password = TAKE_PTR(creds_password);
+ r = hash_password(plaintext_password, &creds_password);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to hash password: %m");
+ }
+
+ if (creds_password)
+ n.sp_pwdp = creds_password;
+
+ r = putspent_sane(&n, shadow);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to add new user \"%s\" to temporary shadow file: %m",
+ i->name);
+ }
+
+ /* Append the remaining NIS entries if any */
+ while (sp) {
+ r = putspent_sane(sp, shadow);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to add existing user \"%s\" to temporary shadow file: %m",
+ sp->sp_namp);
+
+ r = fgetspent_sane(original, &sp);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to read %s: %m", shadow_path);
+ if (r == 0)
+ break;
+ }
+ if (!IN_SET(errno, 0, ENOENT))
+ return -errno;
+
+ r = fflush_sync_and_check(shadow);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to flush %s: %m", shadow_tmp);
+
+ *ret_tmpfile = TAKE_PTR(shadow);
+ *ret_tmpfile_path = TAKE_PTR(shadow_tmp);
+
+ return 0;
+}
+
+static int write_temporary_group(const char *group_path, FILE **ret_tmpfile, char **ret_tmpfile_path) {
+ _cleanup_fclose_ FILE *original = NULL, *group = NULL;
+ _cleanup_(unlink_and_freep) char *group_tmp = NULL;
+ bool group_changed = false;
+ struct group *gr = NULL;
+ Item *i;
+ int r;
+
+ if (ordered_hashmap_isempty(todo_gids) && ordered_hashmap_isempty(members))
+ return 0;
+
+ if (arg_dry_run) {
+ log_info("Would write /etc/group%s", special_glyph(SPECIAL_GLYPH_ELLIPSIS));
+ return 0;
+ }
+
+ r = fopen_temporary_label("/etc/group", group_path, &group, &group_tmp);
+ if (r < 0)
+ return log_error_errno(r, "Failed to open temporary copy of %s: %m", group_path);
+
+ original = fopen(group_path, "re");
+ if (original) {
+
+ r = copy_rights_with_fallback(fileno(original), fileno(group), group_tmp);
+ if (r < 0)
+ return log_error_errno(r, "Failed to copy permissions from %s to %s: %m",
+ group_path, group_tmp);
+
+ while ((r = fgetgrent_sane(original, &gr)) > 0) {
+ /* 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 = ordered_hashmap_get(groups, gr->gr_name);
+ if (i && i->todo_group)
+ return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
+ "%s: Group \"%s\" already exists.",
+ group_path, gr->gr_name);
+
+ if (ordered_hashmap_contains(todo_gids, GID_TO_PTR(gr->gr_gid)))
+ return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
+ "%s: Detected collision for GID " GID_FMT ".",
+ group_path, gr->gr_gid);
+
+ /* Make sure we keep the NIS entries (if any) at the end. */
+ if (IN_SET(gr->gr_name[0], '+', '-'))
+ break;
+
+ r = putgrent_with_members(gr, group);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add existing group \"%s\" to temporary group file: %m",
+ gr->gr_name);
+ if (r > 0)
+ group_changed = true;
+ }
+ if (r < 0)
+ return log_error_errno(r, "Failed to read %s: %m", group_path);
+
+ } else {
+ if (errno != ENOENT)
+ return log_error_errno(errno, "Failed to open %s: %m", group_path);
+ if (fchmod(fileno(group), 0644) < 0)
+ return log_error_errno(errno, "Failed to fchmod %s: %m", group_tmp);
+ }
+
+ ORDERED_HASHMAP_FOREACH(i, todo_gids) {
+ struct group n = {
+ .gr_name = i->name,
+ .gr_gid = i->gid,
+ .gr_passwd = (char*) PASSWORD_SEE_SHADOW,
+ };
+
+ r = putgrent_with_members(&n, group);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add new group \"%s\" to temporary group file: %m",
+ gr->gr_name);
+
+ group_changed = true;
+ }
+
+ /* Append the remaining NIS entries if any */
+ while (gr) {
+ r = putgrent_sane(gr, group);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add existing group \"%s\" to temporary group file: %m",
+ gr->gr_name);
+
+ r = fgetgrent_sane(original, &gr);
+ if (r < 0)
+ return log_error_errno(r, "Failed to read %s: %m", group_path);
+ if (r == 0)
+ break;
+ }
+
+ r = fflush_sync_and_check(group);
+ if (r < 0)
+ return log_error_errno(r, "Failed to flush %s: %m", group_tmp);
+
+ if (group_changed) {
+ *ret_tmpfile = TAKE_PTR(group);
+ *ret_tmpfile_path = TAKE_PTR(group_tmp);
+ }
+ return 0;
+}
+
+static int write_temporary_gshadow(const char * gshadow_path, FILE **ret_tmpfile, char **ret_tmpfile_path) {
+#if ENABLE_GSHADOW
+ _cleanup_fclose_ FILE *original = NULL, *gshadow = NULL;
+ _cleanup_(unlink_and_freep) char *gshadow_tmp = NULL;
+ bool group_changed = false;
+ Item *i;
+ int r;
+
+ if (ordered_hashmap_isempty(todo_gids) && ordered_hashmap_isempty(members))
+ return 0;
+
+ if (arg_dry_run) {
+ log_info("Would write /etc/gshadow%s", special_glyph(SPECIAL_GLYPH_ELLIPSIS));
+ return 0;
+ }
+
+ r = fopen_temporary_label("/etc/gshadow", gshadow_path, &gshadow, &gshadow_tmp);
+ if (r < 0)
+ return log_error_errno(r, "Failed to open temporary copy of %s: %m", gshadow_path);
+
+ original = fopen(gshadow_path, "re");
+ if (original) {
+ struct sgrp *sg;
+
+ r = copy_rights_with_fallback(fileno(original), fileno(gshadow), gshadow_tmp);
+ if (r < 0)
+ return log_error_errno(r, "Failed to copy permissions from %s to %s: %m",
+ gshadow_path, gshadow_tmp);
+
+ while ((r = fgetsgent_sane(original, &sg)) > 0) {
+
+ i = ordered_hashmap_get(groups, sg->sg_namp);
+ if (i && i->todo_group)
+ return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
+ "%s: Group \"%s\" already exists.",
+ gshadow_path, sg->sg_namp);
+
+ r = putsgent_with_members(sg, gshadow);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add existing group \"%s\" to temporary gshadow file: %m",
+ sg->sg_namp);
+ if (r > 0)
+ group_changed = true;
+ }
+ if (r < 0)
+ return r;
+
+ } else {
+ if (errno != ENOENT)
+ return log_error_errno(errno, "Failed to open %s: %m", gshadow_path);
+ if (fchmod(fileno(gshadow), 0000) < 0)
+ return log_error_errno(errno, "Failed to fchmod %s: %m", gshadow_tmp);
+ }
+
+ ORDERED_HASHMAP_FOREACH(i, todo_gids) {
+ struct sgrp n = {
+ .sg_namp = i->name,
+ .sg_passwd = (char*) PASSWORD_LOCKED_AND_INVALID,
+ };
+
+ r = putsgent_with_members(&n, gshadow);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add new group \"%s\" to temporary gshadow file: %m",
+ n.sg_namp);
+
+ group_changed = true;
+ }
+
+ r = fflush_sync_and_check(gshadow);
+ if (r < 0)
+ return log_error_errno(r, "Failed to flush %s: %m", gshadow_tmp);
+
+ if (group_changed) {
+ *ret_tmpfile = TAKE_PTR(gshadow);
+ *ret_tmpfile_path = TAKE_PTR(gshadow_tmp);
+ }
+#endif
+ return 0;
+}
+
+static int write_files(void) {
+ _cleanup_fclose_ FILE *passwd = NULL, *group = NULL, *shadow = NULL, *gshadow = NULL;
+ _cleanup_(unlink_and_freep) char *passwd_tmp = NULL, *group_tmp = NULL, *shadow_tmp = NULL, *gshadow_tmp = NULL;
+ const char *passwd_path, *shadow_path, *group_path, *gshadow_path;
+ int r;
+
+ passwd_path = prefix_roota(arg_root, "/etc/passwd");
+ shadow_path = prefix_roota(arg_root, "/etc/shadow");
+ group_path = prefix_roota(arg_root, "/etc/group");
+ gshadow_path = prefix_roota(arg_root, "/etc/gshadow");
+
+ r = write_temporary_group(group_path, &group, &group_tmp);
+ if (r < 0)
+ return r;
+
+ r = write_temporary_gshadow(gshadow_path, &gshadow, &gshadow_tmp);
+ if (r < 0)
+ return r;
+
+ r = write_temporary_passwd(passwd_path, &passwd, &passwd_tmp);
+ if (r < 0)
+ return r;
+
+ r = write_temporary_shadow(shadow_path, &shadow, &shadow_tmp);
+ if (r < 0)
+ return r;
+
+ /* Make a backup of the old files */
+ if (group) {
+ r = make_backup("/etc/group", group_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to backup %s: %m", group_path);
+ }
+ if (gshadow) {
+ r = make_backup("/etc/gshadow", gshadow_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to backup %s: %m", gshadow_path);
+ }
+
+ if (passwd) {
+ r = make_backup("/etc/passwd", passwd_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to backup %s: %m", passwd_path);
+ }
+ if (shadow) {
+ r = make_backup("/etc/shadow", shadow_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to backup %s: %m", shadow_path);
+ }
+
+ /* And make the new files count */
+ if (group) {
+ r = rename_and_apply_smack_floor_label(group_tmp, group_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to rename %s to %s: %m",
+ group_tmp, group_path);
+ group_tmp = mfree(group_tmp);
+
+ if (!arg_root && !arg_image)
+ (void) nscd_flush_cache(STRV_MAKE("group"));
+ }
+ if (gshadow) {
+ r = rename_and_apply_smack_floor_label(gshadow_tmp, gshadow_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to rename %s to %s: %m",
+ gshadow_tmp, gshadow_path);
+
+ gshadow_tmp = mfree(gshadow_tmp);
+ }
+
+ if (passwd) {
+ r = rename_and_apply_smack_floor_label(passwd_tmp, passwd_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to rename %s to %s: %m",
+ passwd_tmp, passwd_path);
+
+ passwd_tmp = mfree(passwd_tmp);
+
+ if (!arg_root && !arg_image)
+ (void) nscd_flush_cache(STRV_MAKE("passwd"));
+ }
+ if (shadow) {
+ r = rename_and_apply_smack_floor_label(shadow_tmp, shadow_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to rename %s to %s: %m",
+ shadow_tmp, shadow_path);
+
+ shadow_tmp = mfree(shadow_tmp);
+ }
+
+ return 0;
+}
+
+static int uid_is_ok(uid_t uid, const char *name, bool check_with_gid) {
+
+ /* Let's see if we already have assigned the UID a second time */
+ if (ordered_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. */
+ if (check_with_gid) {
+ Item *i;
+
+ i = ordered_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_by_uid, UID_TO_PTR(uid)))
+ return 0;
+
+ if (check_with_gid) {
+ const char *n;
+
+ n = hashmap_get(database_by_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) {
+ struct passwd *p;
+ struct group *g;
+
+ errno = 0;
+ p = getpwuid(uid);
+ if (p)
+ return 0;
+ if (!IN_SET(errno, 0, ENOENT))
+ return -errno;
+
+ if (check_with_gid) {
+ 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 = prefix_roota(arg_root, p);
+ return RET_NERRNO(stat(fix, st));
+}
+
+static int read_id_from_file(Item *i, uid_t *ret_uid, gid_t *ret_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 (ret_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 ((ret_uid || (ret_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 (ret_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 (ret_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 (ret_uid) {
+ if (!found_uid)
+ return 0;
+
+ *ret_uid = uid;
+ }
+
+ if (ret_gid) {
+ if (!found_gid)
+ return 0;
+
+ *ret_gid = gid;
+ }
+
+ return 1;
+}
+
+static int add_user(Item *i) {
+ void *z;
+ int r;
+
+ assert(i);
+
+ /* Check the database directly */
+ z = hashmap_get(database_by_username, 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;
+
+ r = free_and_strdup(&i->description, p->pw_gecos);
+ if (r < 0)
+ return log_oom();
+
+ return 0;
+ }
+ if (!errno_is_not_exists(errno))
+ 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, !i->id_set_strict);
+ if (r < 0)
+ return log_error_errno(r, "Failed to verify UID " UID_FMT ": %m", i->uid);
+ if (r == 0) {
+ log_info("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, c))
+ log_debug("User ID " UID_FMT " of file not suitable for %s.", c, i->name);
+ else {
+ r = uid_is_ok(c, i->name, true);
+ 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, true);
+ 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) {
+ maybe_emit_login_defs_warning();
+
+ for (;;) {
+ r = uid_range_next_lower(uid_range, &search_uid);
+ if (r < 0)
+ return log_error_errno(r, "No free user ID available for %s.", i->name);
+
+ r = uid_is_ok(search_uid, i->name, true);
+ 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 = ordered_hashmap_ensure_put(&todo_uids, NULL, UID_TO_PTR(i->uid), i);
+ if (r == -EEXIST)
+ return log_error_errno(r, "Requested user %s with UID " UID_FMT " and gid" GID_FMT " to be created is duplicated "
+ "or conflicts with another user.", i->name, i->uid, i->gid);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0)
+ return log_error_errno(r, "Failed to store user %s with UID " UID_FMT " and GID " GID_FMT " to be created: %m",
+ i->name, i->uid, i->gid);
+
+ 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, bool check_with_uid) {
+ struct group *g;
+ struct passwd *p;
+
+ if (ordered_hashmap_get(todo_gids, GID_TO_PTR(gid)))
+ return 0;
+
+ /* Avoid reusing gids that are already used by a different user */
+ if (check_with_uid && ordered_hashmap_get(todo_uids, UID_TO_PTR(gid)))
+ return 0;
+
+ if (hashmap_contains(database_by_gid, GID_TO_PTR(gid)))
+ return 0;
+
+ if (check_with_uid && hashmap_contains(database_by_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;
+
+ if (check_with_uid) {
+ errno = 0;
+ p = getpwuid((uid_t) gid);
+ if (p)
+ return 0;
+ if (!IN_SET(errno, 0, ENOENT))
+ return -errno;
+ }
+ }
+
+ return 1;
+}
+
+static int get_gid_by_name(const char *name, gid_t *gid) {
+ void *z;
+
+ assert(gid);
+
+ /* Check the database directly */
+ z = hashmap_get(database_by_groupname, name);
+ if (z) {
+ *gid = PTR_TO_GID(z);
+ return 0;
+ }
+
+ /* Also check NSS */
+ if (!arg_root) {
+ struct group *g;
+
+ errno = 0;
+ g = getgrnam(name);
+ if (g) {
+ *gid = g->gr_gid;
+ return 0;
+ }
+ if (!errno_is_not_exists(errno))
+ return log_error_errno(errno, "Failed to check if group %s already exists: %m", name);
+ }
+
+ return -ENOENT;
+}
+
+static int add_group(Item *i) {
+ int r;
+
+ assert(i);
+
+ r = get_gid_by_name(i->name, &i->gid);
+ if (r != -ENOENT) {
+ if (r < 0)
+ return r;
+ log_debug("Group %s already exists.", i->name);
+ i->gid_set = true;
+ return 0;
+ }
+
+ /* Try to use the suggested numeric GID */
+ if (i->gid_set) {
+ r = gid_is_ok(i->gid, false);
+ if (r < 0)
+ return log_error_errno(r, "Failed to verify GID " GID_FMT ": %m", i->gid);
+ if (i->id_set_strict) {
+ /* If we require the GID to already exist we can return here:
+ * r > 0: means the GID does not exist -> fail
+ * r == 0: means the GID exists -> nothing more to do.
+ */
+ if (r > 0)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Failed to create %s: please create GID " GID_FMT,
+ i->name, i->gid);
+ if (r == 0)
+ return 0;
+ }
+ if (r == 0) {
+ log_info("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, true);
+ 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, c))
+ log_debug("Group ID " GID_FMT " of file not suitable for %s.", c, i->name);
+ else {
+ r = gid_is_ok(c, true);
+ 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) {
+ maybe_emit_login_defs_warning();
+
+ for (;;) {
+ /* We look for new GIDs in the UID pool! */
+ r = uid_range_next_lower(uid_range, &search_uid);
+ if (r < 0)
+ return log_error_errno(r, "No free group ID available for %s.", i->name);
+
+ r = gid_is_ok(search_uid, true);
+ 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 = ordered_hashmap_ensure_put(&todo_gids, NULL, GID_TO_PTR(i->gid), i);
+ if (r == -EEXIST)
+ 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);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0)
+ return log_error_errno(r, "Failed to store group %s with GID " GID_FMT " to be created: %m", i->name, i->gid);
+
+ 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: {
+ Item *j = NULL;
+
+ if (!i->gid_set)
+ j = ordered_hashmap_get(groups, i->group_name ?: i->name);
+
+ if (j && j->todo_group) {
+ /* When a group with the target name is already in queue,
+ * use the information about the group and do not create
+ * duplicated group entry. */
+ i->gid_set = j->gid_set;
+ i->gid = j->gid;
+ i->id_set_strict = true;
+ } else if (i->group_name) {
+ /* When a group name was given instead of a GID and it's
+ * not in queue, then it must already exist. */
+ r = get_gid_by_name(i->group_name, &i->gid);
+ if (r < 0)
+ return log_error_errno(r, "Group %s not found.", i->group_name);
+ i->gid_set = true;
+ i->id_set_strict = true;
+ } else {
+ r = add_group(i);
+ if (r < 0)
+ return r;
+ }
+
+ return add_user(i);
+ }
+
+ case ADD_GROUP:
+ return add_group(i);
+
+ default:
+ assert_not_reached();
+ }
+}
+
+static Item* item_free(Item *i) {
+ if (!i)
+ return NULL;
+
+ free(i->name);
+ free(i->group_name);
+ free(i->uid_path);
+ free(i->gid_path);
+ free(i->description);
+ free(i->home);
+ free(i->shell);
+ return mfree(i);
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(Item*, item_free);
+DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(item_hash_ops, char, string_hash_func, string_compare_func, Item, item_free);
+
+static int add_implicit(void) {
+ char *g, **l;
+ int r;
+
+ /* Implicitly create additional users and groups, if they were listed in "m" lines */
+ ORDERED_HASHMAP_FOREACH_KEY(l, g, members) {
+ STRV_FOREACH(m, l)
+ if (!ordered_hashmap_get(users, *m)) {
+ _cleanup_(item_freep) Item *j = NULL;
+
+ j = new0(Item, 1);
+ if (!j)
+ return log_oom();
+
+ j->type = ADD_USER;
+ j->name = strdup(*m);
+ if (!j->name)
+ return log_oom();
+
+ r = ordered_hashmap_ensure_put(&users, &item_hash_ops, j->name, j);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0)
+ return log_error_errno(r, "Failed to add implicit user '%s': %m", j->name);
+
+ log_debug("Adding implicit user '%s' due to m line", j->name);
+ TAKE_PTR(j);
+ }
+
+ if (!(ordered_hashmap_get(users, g) ||
+ ordered_hashmap_get(groups, g))) {
+ _cleanup_(item_freep) Item *j = NULL;
+
+ j = new0(Item, 1);
+ if (!j)
+ return log_oom();
+
+ j->type = ADD_GROUP;
+ j->name = strdup(g);
+ if (!j->name)
+ return log_oom();
+
+ r = ordered_hashmap_ensure_put(&groups, &item_hash_ops, j->name, j);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0)
+ return log_error_errno(r, "Failed to add implicit group '%s': %m", j->name);
+
+ log_debug("Adding implicit group '%s' due to m line", j->name);
+ TAKE_PTR(j);
+ }
+ }
+
+ return 0;
+}
+
+static int item_equivalent(Item *a, Item *b) {
+ int r;
+
+ assert(a);
+ assert(b);
+
+ if (a->type != b->type)
+ return false;
+
+ if (!streq_ptr(a->name, b->name))
+ return false;
+
+ /* Paths were simplified previously, so we can use streq. */
+ 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;
+
+ /* Check if the two paths refer to the same file.
+ * If the paths are equal (after normalization), it's obviously the same file.
+ * If both paths specify a nologin shell, treat them as the same (e.g. /bin/true and /bin/false).
+ * Otherwise, try to resolve the paths, and see if we get the same result, (e.g. /sbin/nologin and
+ * /usr/sbin/nologin).
+ * If we can't resolve something, treat different paths as different. */
+
+ const char *a_shell = pick_shell(a),
+ *b_shell = pick_shell(b);
+ if (!path_equal_ptr(a_shell, b_shell) &&
+ !(is_nologin_shell(a_shell) && is_nologin_shell(b_shell))) {
+ _cleanup_free_ char *pa = NULL, *pb = NULL;
+
+ r = chase_symlinks(a_shell, arg_root, CHASE_PREFIX_ROOT | CHASE_NONEXISTENT, &pa, NULL);
+ if (r < 0) {
+ log_full_errno(ERRNO_IS_RESOURCE(r) ? LOG_ERR : LOG_DEBUG,
+ r, "Failed to look up path '%s%s%s': %m",
+ strempty(arg_root), arg_root ? "/" : "", a_shell);
+ return ERRNO_IS_RESOURCE(r) ? r : false;
+ }
+
+ r = chase_symlinks(b_shell, arg_root, CHASE_PREFIX_ROOT | CHASE_NONEXISTENT, &pb, NULL);
+ if (r < 0) {
+ log_full_errno(ERRNO_IS_RESOURCE(r) ? LOG_ERR : LOG_DEBUG,
+ r, "Failed to look up path '%s%s%s': %m",
+ strempty(arg_root), arg_root ? "/" : "", b_shell);
+ return ERRNO_IS_RESOURCE(r) ? r : false;
+ }
+
+ if (!path_equal(pa, pb))
+ return false;
+ }
+
+ return true;
+}
+
+static int parse_line(const char *fname, unsigned line, const char *buffer) {
+ _cleanup_free_ char *action = NULL,
+ *name = NULL, *resolved_name = NULL,
+ *id = NULL, *resolved_id = NULL,
+ *description = NULL, *resolved_description = NULL,
+ *home = NULL, *resolved_home = NULL,
+ *shell = NULL, *resolved_shell = NULL;
+ _cleanup_(item_freep) Item *i = NULL;
+ Item *existing;
+ OrderedHashmap *h;
+ int r;
+ const char *p;
+
+ assert(fname);
+ assert(line >= 1);
+ assert(buffer);
+
+ /* Parse columns */
+ p = buffer;
+ r = extract_many_words(&p, NULL, EXTRACT_UNQUOTE,
+ &action, &name, &id, &description, &home, &shell, NULL);
+ if (r < 0)
+ return log_syntax(NULL, LOG_ERR, fname, line, r, "Syntax error.");
+ if (r < 2)
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "Missing action and name columns.");
+ if (!isempty(p))
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "Trailing garbage.");
+
+ /* Verify action */
+ if (strlen(action) != 1)
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "Unknown modifier '%s'.", action);
+
+ if (!IN_SET(action[0], ADD_USER, ADD_GROUP, ADD_MEMBER, ADD_RANGE))
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG),
+ "Unknown command type '%c'.", action[0]);
+
+ /* Verify name */
+ if (empty_or_dash(name))
+ name = mfree(name);
+
+ if (name) {
+ r = specifier_printf(name, NAME_MAX, system_and_tmp_specifier_table, arg_root, NULL, &resolved_name);
+ if (r < 0)
+ return log_syntax(NULL, LOG_ERR, fname, line, r, "Failed to replace specifiers in '%s': %m", name);
+
+ if (!valid_user_group_name(resolved_name, 0))
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "'%s' is not a valid user or group name.", resolved_name);
+ }
+
+ /* Verify id */
+ if (empty_or_dash(id))
+ id = mfree(id);
+
+ if (id) {
+ r = specifier_printf(id, PATH_MAX-1, system_and_tmp_specifier_table, arg_root, NULL, &resolved_id);
+ if (r < 0)
+ return log_syntax(NULL, LOG_ERR, fname, line, r,
+ "Failed to replace specifiers in '%s': %m", name);
+ }
+
+ /* Verify description */
+ if (empty_or_dash(description))
+ description = mfree(description);
+
+ if (description) {
+ r = specifier_printf(description, LONG_LINE_MAX, system_and_tmp_specifier_table, arg_root, NULL, &resolved_description);
+ if (r < 0)
+ return log_syntax(NULL, LOG_ERR, fname, line, r,
+ "Failed to replace specifiers in '%s': %m", description);
+
+ if (!valid_gecos(resolved_description))
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "'%s' is not a valid GECOS field.", resolved_description);
+ }
+
+ /* Verify home */
+ if (empty_or_dash(home))
+ home = mfree(home);
+
+ if (home) {
+ r = specifier_printf(home, PATH_MAX-1, system_and_tmp_specifier_table, arg_root, NULL, &resolved_home);
+ if (r < 0)
+ return log_syntax(NULL, LOG_ERR, fname, line, r,
+ "Failed to replace specifiers in '%s': %m", home);
+
+ path_simplify(resolved_home);
+
+ if (!valid_home(resolved_home))
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "'%s' is not a valid home directory field.", resolved_home);
+ }
+
+ /* Verify shell */
+ if (empty_or_dash(shell))
+ shell = mfree(shell);
+
+ if (shell) {
+ r = specifier_printf(shell, PATH_MAX-1, system_and_tmp_specifier_table, arg_root, NULL, &resolved_shell);
+ if (r < 0)
+ return log_syntax(NULL, LOG_ERR, fname, line, r,
+ "Failed to replace specifiers in '%s': %m", shell);
+
+ path_simplify(resolved_shell);
+
+ if (!valid_shell(resolved_shell))
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "'%s' is not a valid login shell field.", resolved_shell);
+ }
+
+ switch (action[0]) {
+
+ case ADD_RANGE:
+ if (resolved_name)
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "Lines of type 'r' don't take a name field.");
+
+ if (!resolved_id)
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "Lines of type 'r' require an ID range in the third field.");
+
+ if (description || home || shell)
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "Lines of type '%c' don't take a %s field.",
+ action[0],
+ description ? "GECOS" : home ? "home directory" : "login shell");
+
+ r = uid_range_add_str(&uid_range, resolved_id);
+ if (r < 0)
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "Invalid UID range %s.", resolved_id);
+
+ return 0;
+
+ case ADD_MEMBER: {
+ /* Try to extend an existing member or group item */
+ if (!name)
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "Lines of type 'm' require a user name in the second field.");
+
+ if (!resolved_id)
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "Lines of type 'm' require a group name in the third field.");
+
+ if (!valid_user_group_name(resolved_id, 0))
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "'%s' is not a valid user or group name.", resolved_id);
+
+ if (description || home || shell)
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "Lines of type '%c' don't take a %s field.",
+ action[0],
+ description ? "GECOS" : home ? "home directory" : "login shell");
+
+ r = string_strv_ordered_hashmap_put(&members, resolved_id, resolved_name);
+ if (r < 0)
+ return log_error_errno(r, "Failed to store mapping for %s: %m", resolved_id);
+
+ return 0;
+ }
+
+ case ADD_USER:
+ if (!name)
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "Lines of type 'u' require a user name in the second field.");
+
+ r = ordered_hashmap_ensure_allocated(&users, &item_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 = TAKE_PTR(resolved_id);
+ path_simplify(i->uid_path);
+ } else {
+ _cleanup_free_ char *uid = NULL, *gid = NULL;
+ if (split_pair(resolved_id, ":", &uid, &gid) == 0) {
+ r = parse_gid(gid, &i->gid);
+ if (r < 0) {
+ if (valid_user_group_name(gid, 0))
+ i->group_name = TAKE_PTR(gid);
+ else
+ return log_syntax(NULL, LOG_ERR, fname, line, r,
+ "Failed to parse GID: '%s': %m", id);
+ } else {
+ i->gid_set = true;
+ i->id_set_strict = true;
+ }
+ free_and_replace(resolved_id, uid);
+ }
+ if (!streq(resolved_id, "-")) {
+ r = parse_uid(resolved_id, &i->uid);
+ if (r < 0)
+ return log_syntax(NULL, LOG_ERR, fname, line, r,
+ "Failed to parse UID: '%s': %m", id);
+ i->uid_set = true;
+ }
+ }
+ }
+
+ i->description = TAKE_PTR(resolved_description);
+ i->home = TAKE_PTR(resolved_home);
+ i->shell = TAKE_PTR(resolved_shell);
+
+ h = users;
+ break;
+
+ case ADD_GROUP:
+ if (!name)
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "Lines of type 'g' require a user name in the second field.");
+
+ if (description || home || shell)
+ return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL),
+ "Lines of type '%c' don't take a %s field.",
+ action[0],
+ description ? "GECOS" : home ? "home directory" : "login shell");
+
+ r = ordered_hashmap_ensure_allocated(&groups, &item_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 = TAKE_PTR(resolved_id);
+ path_simplify(i->gid_path);
+ } else {
+ r = parse_gid(resolved_id, &i->gid);
+ if (r < 0)
+ return log_syntax(NULL, LOG_ERR, fname, line, r,
+ "Failed to parse GID: '%s': %m", id);
+
+ i->gid_set = true;
+ }
+ }
+
+ h = groups;
+ break;
+
+ default:
+ return -EBADMSG;
+ }
+
+ i->type = action[0];
+ i->name = TAKE_PTR(resolved_name);
+
+ existing = ordered_hashmap_get(h, i->name);
+ if (existing) {
+ /* Two functionally-equivalent items are fine */
+ r = item_equivalent(existing, i);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ log_syntax(NULL, LOG_WARNING, fname, line, SYNTHETIC_ERRNO(EUCLEAN),
+ "Conflict with earlier configuration for %s '%s', ignoring line.",
+ item_type_to_string(i->type), i->name);
+
+ return 0;
+ }
+
+ r = ordered_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;
+ _cleanup_free_ char *pp = NULL;
+ FILE *f = NULL;
+ unsigned v = 0;
+ int r = 0;
+
+ assert(fn);
+
+ if (streq(fn, "-"))
+ f = stdin;
+ else {
+ r = search_and_fopen(fn, "re", arg_root, (const char**) CONF_PATHS_STRV("sysusers.d"), &rf, &pp);
+ if (r < 0) {
+ if (ignore_enoent && r == -ENOENT)
+ return 0;
+
+ return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn);
+ }
+
+ f = rf;
+ fn = pp;
+ }
+
+ for (;;) {
+ _cleanup_free_ char *line = NULL;
+ char *l;
+ int k;
+
+ k = read_line(f, LONG_LINE_MAX, &line);
+ if (k < 0)
+ return log_error_errno(k, "Failed to read '%s': %m", fn);
+ if (k == 0)
+ break;
+
+ v++;
+
+ l = strstrip(line);
+ if (IN_SET(*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 int cat_config(void) {
+ _cleanup_strv_free_ char **files = NULL;
+ int r;
+
+ r = conf_files_list_with_replacement(arg_root, CONF_PATHS_STRV("sysusers.d"), arg_replace, &files, NULL);
+ if (r < 0)
+ return r;
+
+ pager_open(arg_pager_flags);
+
+ return cat_files(NULL, files, 0);
+}
+
+static int help(void) {
+ _cleanup_free_ char *link = NULL;
+ int r;
+
+ r = terminal_urlify_man("systemd-sysusers.service", "8", &link);
+ if (r < 0)
+ return log_oom();
+
+ printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
+ "Creates system user accounts.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " --cat-config Show configuration files\n"
+ " --root=PATH Operate on an alternate filesystem root\n"
+ " --image=PATH Operate on disk image as filesystem root\n"
+ " --replace=PATH Treat arguments as replacement for PATH\n"
+ " --dry-run Just print what would be done\n"
+ " --inline Treat arguments as configuration lines\n"
+ " --no-pager Do not pipe output into a pager\n"
+ "\nSee the %s for details.\n",
+ program_invocation_short_name,
+ link);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_CAT_CONFIG,
+ ARG_ROOT,
+ ARG_IMAGE,
+ ARG_REPLACE,
+ ARG_DRY_RUN,
+ ARG_INLINE,
+ ARG_NO_PAGER,
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "cat-config", no_argument, NULL, ARG_CAT_CONFIG },
+ { "root", required_argument, NULL, ARG_ROOT },
+ { "image", required_argument, NULL, ARG_IMAGE },
+ { "replace", required_argument, NULL, ARG_REPLACE },
+ { "dry-run", no_argument, NULL, ARG_DRY_RUN },
+ { "inline", no_argument, NULL, ARG_INLINE },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ {}
+ };
+
+ int c, r;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
+
+ switch (c) {
+
+ case 'h':
+ return help();
+
+ case ARG_VERSION:
+ return version();
+
+ case ARG_CAT_CONFIG:
+ arg_cat_config = true;
+ break;
+
+ case ARG_ROOT:
+ r = parse_path_argument(optarg, /* suppress_root= */ false, &arg_root);
+ if (r < 0)
+ return r;
+ break;
+
+ case ARG_IMAGE:
+#ifdef STANDALONE
+ return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
+ "This systemd-sysusers version is compiled without support for --image=.");
+#else
+ r = parse_path_argument(optarg, /* suppress_root= */ false, &arg_image);
+ if (r < 0)
+ return r;
+ break;
+#endif
+
+ case ARG_REPLACE:
+ if (!path_is_absolute(optarg) ||
+ !endswith(optarg, ".conf"))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "The argument to --replace= must an absolute path to a config file");
+
+ arg_replace = optarg;
+ break;
+
+ case ARG_DRY_RUN:
+ arg_dry_run = true;
+ break;
+
+ case ARG_INLINE:
+ arg_inline = true;
+ break;
+
+ case ARG_NO_PAGER:
+ arg_pager_flags |= PAGER_DISABLE;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached();
+ }
+
+ if (arg_replace && arg_cat_config)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Option --replace= is not supported with --cat-config");
+
+ if (arg_replace && optind >= argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "When --replace= is given, some configuration items must be specified");
+
+ if (arg_image && arg_root)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Please specify either --root= or --image=, the combination of both is not supported.");
+
+ return 1;
+}
+
+static int parse_arguments(char **args) {
+ unsigned pos = 1;
+ int r;
+
+ STRV_FOREACH(arg, args) {
+ if (arg_inline)
+ /* Use (argument):n, where n==1 for the first positional arg */
+ r = parse_line("(argument)", pos, *arg);
+ else
+ r = read_config_file(*arg, /* ignore_enoent= */ false);
+ if (r < 0)
+ return r;
+
+ pos++;
+ }
+
+ return 0;
+}
+
+static int read_config_files(char **args) {
+ _cleanup_strv_free_ char **files = NULL;
+ _cleanup_free_ char *p = NULL;
+ int r;
+
+ r = conf_files_list_with_replacement(arg_root, CONF_PATHS_STRV("sysusers.d"), arg_replace, &files, &p);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(f, files)
+ if (p && path_equal(*f, p)) {
+ log_debug("Parsing arguments at position \"%s\"%s", *f, special_glyph(SPECIAL_GLYPH_ELLIPSIS));
+
+ r = parse_arguments(args);
+ if (r < 0)
+ return r;
+ } else {
+ log_debug("Reading config file \"%s\"%s", *f, special_glyph(SPECIAL_GLYPH_ELLIPSIS));
+
+ /* Just warn, ignore result otherwise */
+ (void) read_config_file(*f, /* ignore_enoent= */ true);
+ }
+
+ return 0;
+}
+
+static int read_credential_lines(void) {
+ _cleanup_free_ char *j = NULL;
+ const char *d;
+ int r;
+
+ r = get_credentials_dir(&d);
+ if (r == -ENXIO)
+ return 0;
+ if (r < 0)
+ return log_error_errno(r, "Failed to get credentials directory: %m");
+
+ j = path_join(d, "sysusers.extra");
+ if (!j)
+ return log_oom();
+
+ (void) read_config_file(j, /* ignore_enoent= */ true);
+ return 0;
+}
+
+static int run(int argc, char *argv[]) {
+#ifndef STANDALONE
+ _cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL;
+ _cleanup_(umount_and_rmdir_and_freep) char *unlink_dir = NULL;
+#endif
+ _cleanup_close_ int lock = -1;
+ Item *i;
+ int r;
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ return r;
+
+ log_setup();
+
+ if (arg_cat_config)
+ return cat_config();
+
+ umask(0022);
+
+ r = mac_selinux_init();
+ if (r < 0)
+ return r;
+
+#ifndef STANDALONE
+ if (arg_image) {
+ assert(!arg_root);
+
+ r = mount_image_privately_interactively(
+ arg_image,
+ DISSECT_IMAGE_GENERIC_ROOT |
+ DISSECT_IMAGE_REQUIRE_ROOT |
+ DISSECT_IMAGE_VALIDATE_OS |
+ DISSECT_IMAGE_RELAX_VAR_CHECK |
+ DISSECT_IMAGE_FSCK |
+ DISSECT_IMAGE_GROWFS,
+ &unlink_dir,
+ &loop_device);
+ if (r < 0)
+ return r;
+
+ arg_root = strdup(unlink_dir);
+ if (!arg_root)
+ return log_oom();
+ }
+#else
+ assert(!arg_image);
+#endif
+
+ /* If command line arguments are specified along with --replace, read all configuration files and
+ * insert the positional arguments at the specified place. Otherwise, if command line arguments are
+ * specified, execute just them, and finally, without --replace= or any positional arguments, just
+ * read configuration and execute it. */
+ if (arg_replace || optind >= argc)
+ r = read_config_files(argv + optind);
+ else
+ r = parse_arguments(argv + optind);
+ if (r < 0)
+ return r;
+
+ r = read_credential_lines();
+ if (r < 0)
+ return r;
+
+ /* Let's tell nss-systemd not to synthesize the "root" and "nobody" entries for it, so that our
+ * detection whether the names or UID/GID area already used otherwise doesn't get confused. After
+ * all, even though nss-systemd synthesizes these users/groups, they should still appear in
+ * /etc/passwd and /etc/group, as the synthesizing logic is merely supposed to be fallback for cases
+ * where we run with a completely unpopulated /etc. */
+ if (setenv("SYSTEMD_NSS_BYPASS_SYNTHETIC", "1", 1) < 0)
+ return log_error_errno(errno, "Failed to set SYSTEMD_NSS_BYPASS_SYNTHETIC environment variable: %m");
+
+ if (!uid_range) {
+ /* Default to default range of SYSTEMD_UID_MIN..SYSTEM_UID_MAX. */
+ r = read_login_defs(&login_defs, NULL, arg_root);
+ if (r < 0)
+ return log_error_errno(r, "Failed to read %s%s: %m",
+ strempty(arg_root), "/etc/login.defs");
+
+ login_defs_need_warning = true;
+
+ /* We pick a range that very conservative: we look at compiled-in maximum and the value in
+ * /etc/login.defs. That way the UIDs/GIDs which we allocate will be interpreted correctly,
+ * even if /etc/login.defs is removed later. (The bottom bound doesn't matter much, since
+ * it's only used during allocation, so we use the configured value directly). */
+ uid_t begin = login_defs.system_alloc_uid_min,
+ end = MIN3((uid_t) SYSTEM_UID_MAX, login_defs.system_uid_max, login_defs.system_gid_max);
+ if (begin < end) {
+ r = uid_range_add(&uid_range, begin, end - begin + 1);
+ if (r < 0)
+ return log_oom();
+ }
+ }
+
+ r = add_implicit();
+ if (r < 0)
+ return r;
+
+ if (!arg_dry_run) {
+ lock = take_etc_passwd_lock(arg_root);
+ if (lock < 0)
+ return log_error_errno(lock, "Failed to take /etc/passwd lock: %m");
+ }
+
+ r = load_user_database();
+ if (r < 0)
+ return log_error_errno(r, "Failed to load user database: %m");
+
+ r = load_group_database();
+ if (r < 0)
+ return log_error_errno(r, "Failed to read group database: %m");
+
+ ORDERED_HASHMAP_FOREACH(i, groups)
+ (void) process_item(i);
+
+ ORDERED_HASHMAP_FOREACH(i, users)
+ (void) process_item(i);
+
+ return write_files();
+}
+
+DEFINE_MAIN_FUNCTION(run);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 19:49:53 +0000