2004 lines
68 KiB
C
2004 lines
68 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <getopt.h>
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#include <utmp.h>
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#include "alloc-util.h"
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#include "conf-files.h"
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#include "copy.h"
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#include "def.h"
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#include "dissect-image.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "format-util.h"
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#include "fs-util.h"
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#include "hashmap.h"
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#include "main-func.h"
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#include "mount-util.h"
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#include "pager.h"
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#include "path-util.h"
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#include "pretty-print.h"
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#include "selinux-util.h"
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#include "set.h"
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#include "smack-util.h"
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#include "specifier.h"
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#include "string-util.h"
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#include "strv.h"
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#include "tmpfile-util-label.h"
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#include "uid-range.h"
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#include "user-record.h"
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#include "user-util.h"
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#include "utf8.h"
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#include "util.h"
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typedef enum ItemType {
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ADD_USER = 'u',
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ADD_GROUP = 'g',
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ADD_MEMBER = 'm',
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ADD_RANGE = 'r',
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} ItemType;
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typedef struct Item {
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ItemType type;
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char *name;
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char *group_name;
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char *uid_path;
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char *gid_path;
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char *description;
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char *home;
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char *shell;
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gid_t gid;
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uid_t uid;
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bool gid_set:1;
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/* When set the group with the specified gid must exist
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* and the check if a uid clashes with the gid is skipped.
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*/
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bool id_set_strict:1;
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bool uid_set:1;
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bool todo_user:1;
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bool todo_group:1;
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} Item;
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static char *arg_root = NULL;
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static char *arg_image = NULL;
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static bool arg_cat_config = false;
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static const char *arg_replace = NULL;
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static bool arg_inline = false;
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static PagerFlags arg_pager_flags = 0;
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static OrderedHashmap *users = NULL, *groups = NULL;
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static OrderedHashmap *todo_uids = NULL, *todo_gids = NULL;
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static OrderedHashmap *members = NULL;
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static Hashmap *database_by_uid = NULL, *database_by_username = NULL;
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static Hashmap *database_by_gid = NULL, *database_by_groupname = NULL;
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static Set *database_users = NULL, *database_groups = NULL;
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static uid_t search_uid = UID_INVALID;
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static UidRange *uid_range = NULL;
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static unsigned n_uid_range = 0;
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STATIC_DESTRUCTOR_REGISTER(groups, ordered_hashmap_freep);
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STATIC_DESTRUCTOR_REGISTER(users, ordered_hashmap_freep);
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STATIC_DESTRUCTOR_REGISTER(members, ordered_hashmap_freep);
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STATIC_DESTRUCTOR_REGISTER(todo_uids, ordered_hashmap_freep);
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STATIC_DESTRUCTOR_REGISTER(todo_gids, ordered_hashmap_freep);
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STATIC_DESTRUCTOR_REGISTER(database_by_uid, hashmap_freep);
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STATIC_DESTRUCTOR_REGISTER(database_by_username, hashmap_freep);
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STATIC_DESTRUCTOR_REGISTER(database_users, set_free_freep);
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STATIC_DESTRUCTOR_REGISTER(database_by_gid, hashmap_freep);
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STATIC_DESTRUCTOR_REGISTER(database_by_groupname, hashmap_freep);
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STATIC_DESTRUCTOR_REGISTER(database_groups, set_free_freep);
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STATIC_DESTRUCTOR_REGISTER(uid_range, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_root, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_image, freep);
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static int errno_is_not_exists(int code) {
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/* See getpwnam(3) and getgrnam(3): those codes and others can be returned if the user or group are
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* not found. */
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return IN_SET(code, 0, ENOENT, ESRCH, EBADF, EPERM);
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}
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static int load_user_database(void) {
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_cleanup_fclose_ FILE *f = NULL;
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const char *passwd_path;
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struct passwd *pw;
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int r;
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passwd_path = prefix_roota(arg_root, "/etc/passwd");
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f = fopen(passwd_path, "re");
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if (!f)
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return errno == ENOENT ? 0 : -errno;
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r = hashmap_ensure_allocated(&database_by_username, &string_hash_ops);
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if (r < 0)
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return r;
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r = hashmap_ensure_allocated(&database_by_uid, NULL);
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if (r < 0)
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return r;
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r = set_ensure_allocated(&database_users, NULL);
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if (r < 0)
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return r;
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while ((r = fgetpwent_sane(f, &pw)) > 0) {
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char *n;
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int k, q;
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n = strdup(pw->pw_name);
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if (!n)
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return -ENOMEM;
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k = set_put(database_users, n);
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if (k < 0) {
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free(n);
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return k;
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}
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k = hashmap_put(database_by_username, n, UID_TO_PTR(pw->pw_uid));
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if (k < 0 && k != -EEXIST)
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return k;
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q = hashmap_put(database_by_uid, UID_TO_PTR(pw->pw_uid), n);
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if (q < 0 && q != -EEXIST)
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return q;
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}
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return r;
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}
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static int load_group_database(void) {
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_cleanup_fclose_ FILE *f = NULL;
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const char *group_path;
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struct group *gr;
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int r;
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group_path = prefix_roota(arg_root, "/etc/group");
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f = fopen(group_path, "re");
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if (!f)
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return errno == ENOENT ? 0 : -errno;
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r = hashmap_ensure_allocated(&database_by_groupname, &string_hash_ops);
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if (r < 0)
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return r;
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r = hashmap_ensure_allocated(&database_by_gid, NULL);
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if (r < 0)
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return r;
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r = set_ensure_allocated(&database_groups, NULL);
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if (r < 0)
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return r;
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while ((r = fgetgrent_sane(f, &gr)) > 0) {
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char *n;
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int k, q;
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n = strdup(gr->gr_name);
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if (!n)
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return -ENOMEM;
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k = set_put(database_groups, n);
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if (k < 0) {
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free(n);
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return k;
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}
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k = hashmap_put(database_by_groupname, n, GID_TO_PTR(gr->gr_gid));
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if (k < 0 && k != -EEXIST)
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return k;
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q = hashmap_put(database_by_gid, GID_TO_PTR(gr->gr_gid), n);
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if (q < 0 && q != -EEXIST)
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return q;
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}
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return r;
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}
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static int make_backup(const char *target, const char *x) {
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_cleanup_(unlink_and_freep) char *dst_tmp = NULL;
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_cleanup_fclose_ FILE *dst = NULL;
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_cleanup_close_ int src = -1;
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const char *backup;
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struct stat st;
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int r;
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assert(target);
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assert(x);
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src = open(x, O_RDONLY|O_CLOEXEC|O_NOCTTY);
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if (src < 0) {
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if (errno == ENOENT) /* No backup necessary... */
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return 0;
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return -errno;
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}
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if (fstat(src, &st) < 0)
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return -errno;
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r = fopen_temporary_label(
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target, /* The path for which to the lookup the label */
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x, /* Where we want the file actually to end up */
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&dst,
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&dst_tmp /* The temporary file we write to */);
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if (r < 0)
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return r;
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r = copy_bytes(src, fileno(dst), (uint64_t) -1, COPY_REFLINK);
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if (r < 0)
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return r;
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backup = strjoina(x, "-");
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/* Copy over the access mask. Don't fail on chmod() or chown(). If it stays owned by us and/or
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* unreadable by others, then it isn't too bad... */
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r = fchmod_and_chown(fileno(dst), st.st_mode & 07777, st.st_uid, st.st_gid);
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if (r < 0)
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log_warning_errno(r, "Failed to change access mode or ownership of %s: %m", backup);
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if (futimens(fileno(dst), (const struct timespec[2]) { st.st_atim, st.st_mtim }) < 0)
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log_warning_errno(errno, "Failed to fix access and modification time of %s: %m", backup);
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r = fsync_full(fileno(dst));
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if (r < 0)
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return r;
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if (rename(dst_tmp, backup) < 0)
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return errno;
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dst_tmp = mfree(dst_tmp); /* disable the unlink_and_freep() hook now that the file has been renamed*/
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return 0;
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}
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static int putgrent_with_members(const struct group *gr, FILE *group) {
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char **a;
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assert(gr);
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assert(group);
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a = ordered_hashmap_get(members, gr->gr_name);
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if (a) {
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_cleanup_strv_free_ char **l = NULL;
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bool added = false;
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char **i;
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l = strv_copy(gr->gr_mem);
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if (!l)
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return -ENOMEM;
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STRV_FOREACH(i, a) {
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if (strv_find(l, *i))
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continue;
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if (strv_extend(&l, *i) < 0)
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return -ENOMEM;
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added = true;
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}
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if (added) {
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struct group t;
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int r;
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strv_uniq(l);
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strv_sort(l);
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t = *gr;
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t.gr_mem = l;
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r = putgrent_sane(&t, group);
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return r < 0 ? r : 1;
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}
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}
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return putgrent_sane(gr, group);
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}
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#if ENABLE_GSHADOW
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static int putsgent_with_members(const struct sgrp *sg, FILE *gshadow) {
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char **a;
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assert(sg);
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assert(gshadow);
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a = ordered_hashmap_get(members, sg->sg_namp);
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if (a) {
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_cleanup_strv_free_ char **l = NULL;
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bool added = false;
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char **i;
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l = strv_copy(sg->sg_mem);
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if (!l)
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return -ENOMEM;
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STRV_FOREACH(i, a) {
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if (strv_find(l, *i))
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continue;
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if (strv_extend(&l, *i) < 0)
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return -ENOMEM;
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added = true;
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}
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if (added) {
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struct sgrp t;
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int r;
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strv_uniq(l);
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strv_sort(l);
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t = *sg;
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t.sg_mem = l;
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r = putsgent_sane(&t, gshadow);
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return r < 0 ? r : 1;
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}
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}
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return putsgent_sane(sg, gshadow);
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}
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#endif
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static const char* default_shell(uid_t uid) {
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return uid == 0 ? "/bin/sh" : NOLOGIN;
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}
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static int write_temporary_passwd(const char *passwd_path, FILE **tmpfile, char **tmpfile_path) {
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_cleanup_fclose_ FILE *original = NULL, *passwd = NULL;
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_cleanup_(unlink_and_freep) char *passwd_tmp = NULL;
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struct passwd *pw = NULL;
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Item *i;
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int r;
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if (ordered_hashmap_size(todo_uids) == 0)
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return 0;
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r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp);
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if (r < 0)
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return r;
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original = fopen(passwd_path, "re");
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if (original) {
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r = sync_rights(fileno(original), fileno(passwd));
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if (r < 0)
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return r;
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while ((r = fgetpwent_sane(original, &pw)) > 0) {
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i = ordered_hashmap_get(users, pw->pw_name);
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if (i && i->todo_user)
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return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
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"%s: User \"%s\" already exists.",
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passwd_path, pw->pw_name);
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if (ordered_hashmap_contains(todo_uids, UID_TO_PTR(pw->pw_uid)))
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return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
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"%s: Detected collision for UID " UID_FMT ".",
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passwd_path, pw->pw_uid);
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/* Make sure we keep the NIS entries (if any) at the end. */
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if (IN_SET(pw->pw_name[0], '+', '-'))
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break;
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r = putpwent_sane(pw, passwd);
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if (r < 0)
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return r;
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}
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if (r < 0)
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return r;
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} else {
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if (errno != ENOENT)
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return -errno;
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if (fchmod(fileno(passwd), 0644) < 0)
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return -errno;
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}
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ORDERED_HASHMAP_FOREACH(i, todo_uids) {
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struct passwd n = {
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.pw_name = i->name,
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.pw_uid = i->uid,
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.pw_gid = i->gid,
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.pw_gecos = i->description,
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/* "x" means the password is stored in the shadow file */
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.pw_passwd = (char*) "x",
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/* We default to the root directory as home */
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.pw_dir = i->home ?: (char*) "/",
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/* Initialize the shell to nologin, with one exception:
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* for root we patch in something special */
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.pw_shell = i->shell ?: (char*) default_shell(i->uid),
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};
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r = putpwent_sane(&n, passwd);
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if (r < 0)
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return r;
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}
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/* Append the remaining NIS entries if any */
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while (pw) {
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r = putpwent_sane(pw, passwd);
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if (r < 0)
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return r;
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r = fgetpwent_sane(original, &pw);
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if (r < 0)
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return r;
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if (r == 0)
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break;
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}
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r = fflush_and_check(passwd);
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if (r < 0)
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return r;
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*tmpfile = TAKE_PTR(passwd);
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*tmpfile_path = TAKE_PTR(passwd_tmp);
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return 0;
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}
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static int write_temporary_shadow(const char *shadow_path, FILE **tmpfile, char **tmpfile_path) {
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_cleanup_fclose_ FILE *original = NULL, *shadow = NULL;
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_cleanup_(unlink_and_freep) char *shadow_tmp = NULL;
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struct spwd *sp = NULL;
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long lstchg;
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Item *i;
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int r;
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if (ordered_hashmap_size(todo_uids) == 0)
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return 0;
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r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp);
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if (r < 0)
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return r;
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lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY);
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original = fopen(shadow_path, "re");
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if (original) {
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r = sync_rights(fileno(original), fileno(shadow));
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if (r < 0)
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return r;
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while ((r = fgetspent_sane(original, &sp)) > 0) {
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i = ordered_hashmap_get(users, sp->sp_namp);
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if (i && i->todo_user) {
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/* we will update the existing entry */
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sp->sp_lstchg = lstchg;
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/* only the /etc/shadow stage is left, so we can
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* safely remove the item from the todo set */
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i->todo_user = false;
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ordered_hashmap_remove(todo_uids, UID_TO_PTR(i->uid));
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}
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/* Make sure we keep the NIS entries (if any) at the end. */
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if (IN_SET(sp->sp_namp[0], '+', '-'))
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break;
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r = putspent_sane(sp, shadow);
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if (r < 0)
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return r;
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}
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if (r < 0)
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return r;
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} else {
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if (errno != ENOENT)
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return -errno;
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if (fchmod(fileno(shadow), 0000) < 0)
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return -errno;
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}
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ORDERED_HASHMAP_FOREACH(i, todo_uids) {
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struct spwd n = {
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.sp_namp = i->name,
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.sp_pwdp = (char*) "!*", /* lock this password, and make it invalid */
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.sp_lstchg = lstchg,
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.sp_min = -1,
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.sp_max = -1,
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.sp_warn = -1,
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.sp_inact = -1,
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.sp_expire = -1,
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.sp_flag = (unsigned long) -1, /* this appears to be what everybody does ... */
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};
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r = putspent_sane(&n, shadow);
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if (r < 0)
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return r;
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}
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/* Append the remaining NIS entries if any */
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while (sp) {
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r = putspent_sane(sp, shadow);
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if (r < 0)
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return r;
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r = fgetspent_sane(original, &sp);
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if (r < 0)
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return r;
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if (r == 0)
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break;
|
|
}
|
|
if (!IN_SET(errno, 0, ENOENT))
|
|
return -errno;
|
|
|
|
r = fflush_sync_and_check(shadow);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
*tmpfile = TAKE_PTR(shadow);
|
|
*tmpfile_path = TAKE_PTR(shadow_tmp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int write_temporary_group(const char *group_path, FILE **tmpfile, char **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_size(todo_gids) == 0 && ordered_hashmap_size(members) == 0)
|
|
return 0;
|
|
|
|
r = fopen_temporary_label("/etc/group", group_path, &group, &group_tmp);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
original = fopen(group_path, "re");
|
|
if (original) {
|
|
|
|
r = sync_rights(fileno(original), fileno(group));
|
|
if (r < 0)
|
|
return r;
|
|
|
|
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 r;
|
|
if (r > 0)
|
|
group_changed = true;
|
|
}
|
|
if (r < 0)
|
|
return r;
|
|
|
|
} else {
|
|
if (errno != ENOENT)
|
|
return -errno;
|
|
if (fchmod(fileno(group), 0644) < 0)
|
|
return -errno;
|
|
}
|
|
|
|
ORDERED_HASHMAP_FOREACH(i, todo_gids) {
|
|
struct group n = {
|
|
.gr_name = i->name,
|
|
.gr_gid = i->gid,
|
|
.gr_passwd = (char*) "x",
|
|
};
|
|
|
|
r = putgrent_with_members(&n, group);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
group_changed = true;
|
|
}
|
|
|
|
/* Append the remaining NIS entries if any */
|
|
while (gr) {
|
|
r = putgrent_sane(gr, group);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = fgetgrent_sane(original, &gr);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
break;
|
|
}
|
|
|
|
r = fflush_sync_and_check(group);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (group_changed) {
|
|
*tmpfile = TAKE_PTR(group);
|
|
*tmpfile_path = TAKE_PTR(group_tmp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int write_temporary_gshadow(const char * gshadow_path, FILE **tmpfile, char **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_size(todo_gids) == 0 && ordered_hashmap_size(members) == 0)
|
|
return 0;
|
|
|
|
r = fopen_temporary_label("/etc/gshadow", gshadow_path, &gshadow, &gshadow_tmp);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
original = fopen(gshadow_path, "re");
|
|
if (original) {
|
|
struct sgrp *sg;
|
|
|
|
r = sync_rights(fileno(original), fileno(gshadow));
|
|
if (r < 0)
|
|
return r;
|
|
|
|
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 r;
|
|
if (r > 0)
|
|
group_changed = true;
|
|
}
|
|
if (r < 0)
|
|
return r;
|
|
|
|
} else {
|
|
if (errno != ENOENT)
|
|
return -errno;
|
|
if (fchmod(fileno(gshadow), 0000) < 0)
|
|
return -errno;
|
|
}
|
|
|
|
ORDERED_HASHMAP_FOREACH(i, todo_gids) {
|
|
struct sgrp n = {
|
|
.sg_namp = i->name,
|
|
.sg_passwd = (char*) "!!",
|
|
};
|
|
|
|
r = putsgent_with_members(&n, gshadow);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
group_changed = true;
|
|
}
|
|
|
|
r = fflush_sync_and_check(gshadow);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (group_changed) {
|
|
*tmpfile = TAKE_PTR(gshadow);
|
|
*tmpfile_path = TAKE_PTR(gshadow_tmp);
|
|
}
|
|
return 0;
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
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 = NULL, *group_path = NULL, *shadow_path = NULL, *gshadow_path = NULL;
|
|
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 r;
|
|
}
|
|
if (gshadow) {
|
|
r = make_backup("/etc/gshadow", gshadow_path);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (passwd) {
|
|
r = make_backup("/etc/passwd", passwd_path);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
if (shadow) {
|
|
r = make_backup("/etc/shadow", shadow_path);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
/* And make the new files count */
|
|
if (group) {
|
|
r = rename_and_apply_smack_floor_label(group_tmp, group_path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
group_tmp = mfree(group_tmp);
|
|
}
|
|
if (gshadow) {
|
|
r = rename_and_apply_smack_floor_label(gshadow_tmp, gshadow_path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
gshadow_tmp = mfree(gshadow_tmp);
|
|
}
|
|
|
|
if (passwd) {
|
|
r = rename_and_apply_smack_floor_label(passwd_tmp, passwd_path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
passwd_tmp = mfree(passwd_tmp);
|
|
}
|
|
if (shadow) {
|
|
r = rename_and_apply_smack_floor_label(shadow_tmp, shadow_path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
shadow_tmp = mfree(shadow_tmp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int uid_is_ok(uid_t uid, const char *name, bool check_with_gid) {
|
|
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 (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) {
|
|
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) {
|
|
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) {
|
|
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);
|
|
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_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_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, 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) {
|
|
for (;;) {
|
|
r = uid_range_next_lower(uid_range, n_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_allocated(&todo_uids, NULL);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
r = ordered_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 (ordered_hashmap_get(todo_gids, GID_TO_PTR(gid)))
|
|
return 0;
|
|
|
|
/* Avoid reusing gids that are already used by a different user */
|
|
if (ordered_hashmap_get(todo_uids, UID_TO_PTR(gid)))
|
|
return 0;
|
|
|
|
if (hashmap_contains(database_by_gid, GID_TO_PTR(gid)))
|
|
return 0;
|
|
|
|
if (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;
|
|
|
|
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);
|
|
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 %d",
|
|
i->name, i->gid);
|
|
if (r == 0)
|
|
return 0;
|
|
}
|
|
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)
|
|
return log_error_errno(r, "No free group ID available for %s.", i->name);
|
|
|
|
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 = ordered_hashmap_ensure_allocated(&todo_gids, NULL);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
r = ordered_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: {
|
|
Item *j;
|
|
|
|
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("Unknown item type");
|
|
}
|
|
}
|
|
|
|
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) {
|
|
char **m;
|
|
|
|
STRV_FOREACH(m, l)
|
|
if (!ordered_hashmap_get(users, *m)) {
|
|
_cleanup_(item_freep) Item *j = NULL;
|
|
|
|
r = ordered_hashmap_ensure_allocated(&users, &item_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 = ordered_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;
|
|
}
|
|
|
|
if (!(ordered_hashmap_get(users, g) ||
|
|
ordered_hashmap_get(groups, g))) {
|
|
_cleanup_(item_freep) Item *j = NULL;
|
|
|
|
r = ordered_hashmap_ensure_allocated(&groups, &item_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 = ordered_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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
if (!streq_ptr(a->shell, b->shell))
|
|
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 },
|
|
{ 'l', specifier_short_host_name, NULL },
|
|
{ 'v', specifier_kernel_release, NULL },
|
|
{ 'a', specifier_architecture, NULL },
|
|
{ 'o', specifier_os_id, NULL },
|
|
{ 'w', specifier_os_version_id, NULL },
|
|
{ 'B', specifier_os_build_id, NULL },
|
|
{ 'W', specifier_os_variant_id, NULL },
|
|
{ 'T', specifier_tmp_dir, NULL },
|
|
{ 'V', specifier_var_tmp_dir, NULL },
|
|
{}
|
|
};
|
|
|
|
_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_error_errno(r, "[%s:%u] Syntax error.", fname, line);
|
|
if (r < 2)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] Missing action and name columns.", fname, line);
|
|
if (!isempty(p))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] Trailing garbage.", fname, line);
|
|
|
|
/* Verify action */
|
|
if (strlen(action) != 1)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] Unknown modifier '%s'", fname, line, action);
|
|
|
|
if (!IN_SET(action[0], ADD_USER, ADD_GROUP, ADD_MEMBER, ADD_RANGE))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EBADMSG),
|
|
"[%s:%u] Unknown command type '%c'.", fname, line, action[0]);
|
|
|
|
/* Verify name */
|
|
if (empty_or_dash(name))
|
|
name = mfree(name);
|
|
|
|
if (name) {
|
|
r = specifier_printf(name, specifier_table, NULL, &resolved_name);
|
|
if (r < 0)
|
|
return log_error_errno(r, "[%s:%u] Failed to replace specifiers in '%s': %m", fname, line, name);
|
|
|
|
if (!valid_user_group_name(resolved_name, 0))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] '%s' is not a valid user or group name.",
|
|
fname, line, resolved_name);
|
|
}
|
|
|
|
/* Verify id */
|
|
if (empty_or_dash(id))
|
|
id = mfree(id);
|
|
|
|
if (id) {
|
|
r = specifier_printf(id, specifier_table, NULL, &resolved_id);
|
|
if (r < 0)
|
|
return log_error_errno(r, "[%s:%u] Failed to replace specifiers in '%s': %m",
|
|
fname, line, name);
|
|
}
|
|
|
|
/* Verify description */
|
|
if (empty_or_dash(description))
|
|
description = mfree(description);
|
|
|
|
if (description) {
|
|
r = specifier_printf(description, specifier_table, NULL, &resolved_description);
|
|
if (r < 0)
|
|
return log_error_errno(r, "[%s:%u] Failed to replace specifiers in '%s': %m",
|
|
fname, line, description);
|
|
|
|
if (!valid_gecos(resolved_description))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] '%s' is not a valid GECOS field.",
|
|
fname, line, resolved_description);
|
|
}
|
|
|
|
/* Verify home */
|
|
if (empty_or_dash(home))
|
|
home = mfree(home);
|
|
|
|
if (home) {
|
|
r = specifier_printf(home, specifier_table, NULL, &resolved_home);
|
|
if (r < 0)
|
|
return log_error_errno(r, "[%s:%u] Failed to replace specifiers in '%s': %m",
|
|
fname, line, home);
|
|
|
|
if (!valid_home(resolved_home))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] '%s' is not a valid home directory field.",
|
|
fname, line, resolved_home);
|
|
}
|
|
|
|
/* Verify shell */
|
|
if (empty_or_dash(shell))
|
|
shell = mfree(shell);
|
|
|
|
if (shell) {
|
|
r = specifier_printf(shell, specifier_table, NULL, &resolved_shell);
|
|
if (r < 0)
|
|
return log_error_errno(r, "[%s:%u] Failed to replace specifiers in '%s': %m",
|
|
fname, line, shell);
|
|
|
|
if (!valid_shell(resolved_shell))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] '%s' is not a valid login shell field.",
|
|
fname, line, resolved_shell);
|
|
}
|
|
|
|
switch (action[0]) {
|
|
|
|
case ADD_RANGE:
|
|
if (resolved_name)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] Lines of type 'r' don't take a name field.",
|
|
fname, line);
|
|
|
|
if (!resolved_id)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] Lines of type 'r' require a ID range in the third field.",
|
|
fname, line);
|
|
|
|
if (description || home || shell)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] Lines of type '%c' don't take a %s field.",
|
|
fname, line, action[0],
|
|
description ? "GECOS" : home ? "home directory" : "login shell");
|
|
|
|
r = uid_range_add_str(&uid_range, &n_uid_range, resolved_id);
|
|
if (r < 0)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] Invalid UID range %s.", fname, line, resolved_id);
|
|
|
|
return 0;
|
|
|
|
case ADD_MEMBER: {
|
|
/* Try to extend an existing member or group item */
|
|
if (!name)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] Lines of type 'm' require a user name in the second field.",
|
|
fname, line);
|
|
|
|
if (!resolved_id)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] Lines of type 'm' require a group name in the third field.",
|
|
fname, line);
|
|
|
|
if (!valid_user_group_name(resolved_id, 0))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] '%s' is not a valid user or group name.",
|
|
fname, line, resolved_id);
|
|
|
|
if (description || home || shell)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] Lines of type '%c' don't take a %s field.",
|
|
fname, line, 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_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] Lines of type 'u' require a user name in the second field.",
|
|
fname, line);
|
|
|
|
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, false);
|
|
} 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_error_errno(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_error_errno(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_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] Lines of type 'g' require a user name in the second field.",
|
|
fname, line);
|
|
|
|
if (description || home || shell)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"[%s:%u] Lines of type '%c' don't take a %s field.",
|
|
fname, line, 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, false);
|
|
} else {
|
|
r = parse_gid(resolved_id, &i->gid);
|
|
if (r < 0)
|
|
return log_error_errno(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 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 = 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;
|
|
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);
|
|
if (r < 0) {
|
|
if (ignore_enoent && r == -ENOENT)
|
|
return 0;
|
|
|
|
return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn);
|
|
}
|
|
|
|
f = rf;
|
|
}
|
|
|
|
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;
|
|
|
|
(void) 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"
|
|
" --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_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 },
|
|
{ "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_and_warn(optarg, /* suppress_root= */ false, &arg_root);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case ARG_IMAGE:
|
|
r = parse_path_argument_and_warn(optarg, /* suppress_root= */ false, &arg_image);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
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_INLINE:
|
|
arg_inline = true;
|
|
break;
|
|
|
|
case ARG_NO_PAGER:
|
|
arg_pager_flags |= PAGER_DISABLE;
|
|
break;
|
|
|
|
case '?':
|
|
return -EINVAL;
|
|
|
|
default:
|
|
assert_not_reached("Unhandled option");
|
|
}
|
|
|
|
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) {
|
|
char **arg;
|
|
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, 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;
|
|
char **f;
|
|
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\"…", *f);
|
|
|
|
r = parse_arguments(args);
|
|
if (r < 0)
|
|
return r;
|
|
} else {
|
|
log_debug("Reading config file \"%s\"…", *f);
|
|
|
|
/* Just warn, ignore result otherwise */
|
|
(void) read_config_file(*f, true);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int run(int argc, char *argv[]) {
|
|
_cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL;
|
|
_cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL;
|
|
_cleanup_(umount_and_rmdir_and_freep) char *unlink_dir = NULL;
|
|
_cleanup_close_ int lock = -1;
|
|
Item *i;
|
|
int r;
|
|
|
|
r = parse_argv(argc, argv);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
log_setup_service();
|
|
|
|
if (arg_cat_config)
|
|
return cat_config();
|
|
|
|
umask(0022);
|
|
|
|
r = mac_selinux_init();
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (arg_image) {
|
|
assert(!arg_root);
|
|
|
|
r = mount_image_privately_interactively(
|
|
arg_image,
|
|
DISSECT_IMAGE_REQUIRE_ROOT|DISSECT_IMAGE_VALIDATE_OS|DISSECT_IMAGE_RELAX_VAR_CHECK|DISSECT_IMAGE_FSCK,
|
|
&unlink_dir,
|
|
&loop_device,
|
|
&decrypted_image);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
arg_root = strdup(unlink_dir);
|
|
if (!arg_root)
|
|
return log_oom();
|
|
}
|
|
|
|
/* 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;
|
|
|
|
/* 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. */
|
|
UGIDAllocationRange defs;
|
|
|
|
r = read_login_defs(&defs, NULL, arg_root);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to read %s%s: %m",
|
|
strempty(arg_root), "/etc/login.defs");
|
|
|
|
/* 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 = defs.system_alloc_uid_min,
|
|
end = MIN3((uid_t) SYSTEM_UID_MAX, defs.system_uid_max, defs.system_gid_max);
|
|
if (begin < end) {
|
|
r = uid_range_add(&uid_range, &n_uid_range, begin, end - begin + 1);
|
|
if (r < 0)
|
|
return log_oom();
|
|
}
|
|
}
|
|
|
|
r = add_implicit();
|
|
if (r < 0)
|
|
return r;
|
|
|
|
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);
|
|
|
|
r = write_files();
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to write files: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_MAIN_FUNCTION(run);
|