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-rw-r--r--src/userdb/userdbctl.c1334
1 files changed, 1334 insertions, 0 deletions
diff --git a/src/userdb/userdbctl.c b/src/userdb/userdbctl.c
new file mode 100644
index 0000000..a7db3fb
--- /dev/null
+++ b/src/userdb/userdbctl.c
@@ -0,0 +1,1334 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <getopt.h>
+#include <utmp.h>
+
+#include "build.h"
+#include "dirent-util.h"
+#include "errno-list.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "format-table.h"
+#include "format-util.h"
+#include "main-func.h"
+#include "pager.h"
+#include "parse-argument.h"
+#include "parse-util.h"
+#include "pretty-print.h"
+#include "socket-util.h"
+#include "strv.h"
+#include "terminal-util.h"
+#include "uid-range.h"
+#include "user-record-show.h"
+#include "user-util.h"
+#include "userdb.h"
+#include "verbs.h"
+
+static enum {
+ OUTPUT_CLASSIC,
+ OUTPUT_TABLE,
+ OUTPUT_FRIENDLY,
+ OUTPUT_JSON,
+ _OUTPUT_INVALID = -EINVAL,
+} arg_output = _OUTPUT_INVALID;
+
+static PagerFlags arg_pager_flags = 0;
+static bool arg_legend = true;
+static char** arg_services = NULL;
+static UserDBFlags arg_userdb_flags = 0;
+static JsonFormatFlags arg_json_format_flags = JSON_FORMAT_OFF;
+static bool arg_chain = false;
+
+STATIC_DESTRUCTOR_REGISTER(arg_services, strv_freep);
+
+static const char *user_disposition_to_color(UserDisposition d) {
+ assert(d >= 0);
+ assert(d < _USER_DISPOSITION_MAX);
+
+ switch (d) {
+ case USER_INTRINSIC:
+ return ansi_red();
+
+ case USER_SYSTEM:
+ case USER_DYNAMIC:
+ return ansi_green();
+
+ case USER_CONTAINER:
+ return ansi_cyan();
+
+ case USER_RESERVED:
+ return ansi_red();
+
+ default:
+ return NULL;
+ }
+}
+
+static int show_user(UserRecord *ur, Table *table) {
+ int r;
+
+ assert(ur);
+
+ switch (arg_output) {
+
+ case OUTPUT_CLASSIC:
+ if (!uid_is_valid(ur->uid))
+ break;
+
+ printf("%s:x:" UID_FMT ":" GID_FMT ":%s:%s:%s\n",
+ ur->user_name,
+ ur->uid,
+ user_record_gid(ur),
+ strempty(user_record_real_name(ur)),
+ user_record_home_directory(ur),
+ user_record_shell(ur));
+
+ break;
+
+ case OUTPUT_JSON:
+ json_variant_dump(ur->json, arg_json_format_flags, NULL, 0);
+ break;
+
+ case OUTPUT_FRIENDLY:
+ user_record_show(ur, true);
+
+ if (ur->incomplete) {
+ fflush(stdout);
+ log_warning("Warning: lacking rights to acquire privileged fields of user record of '%s', output incomplete.", ur->user_name);
+ }
+
+ break;
+
+ case OUTPUT_TABLE: {
+ UserDisposition d;
+
+ assert(table);
+ d = user_record_disposition(ur);
+
+ r = table_add_many(
+ table,
+ TABLE_STRING, "",
+ TABLE_STRING, ur->user_name,
+ TABLE_SET_COLOR, user_disposition_to_color(d),
+ TABLE_STRING, user_disposition_to_string(d),
+ TABLE_UID, ur->uid,
+ TABLE_GID, user_record_gid(ur),
+ TABLE_STRING, empty_to_null(ur->real_name),
+ TABLE_STRING, user_record_home_directory(ur),
+ TABLE_STRING, user_record_shell(ur),
+ TABLE_INT, 0);
+ if (r < 0)
+ return table_log_add_error(r);
+
+ break;
+ }
+
+ default:
+ assert_not_reached();
+ }
+
+ return 0;
+}
+
+static const struct {
+ uid_t first, last;
+ const char *name;
+ UserDisposition disposition;
+} uid_range_table[] = {
+ {
+ .first = 1,
+ .last = SYSTEM_UID_MAX,
+ .name = "system",
+ .disposition = USER_SYSTEM,
+ },
+ {
+ .first = DYNAMIC_UID_MIN,
+ .last = DYNAMIC_UID_MAX,
+ .name = "dynamic system",
+ .disposition = USER_DYNAMIC,
+ },
+ {
+ .first = CONTAINER_UID_BASE_MIN,
+ .last = CONTAINER_UID_BASE_MAX,
+ .name = "container",
+ .disposition = USER_CONTAINER,
+ },
+#if ENABLE_HOMED
+ {
+ .first = HOME_UID_MIN,
+ .last = HOME_UID_MAX,
+ .name = "systemd-homed",
+ .disposition = USER_REGULAR,
+ },
+#endif
+ {
+ .first = MAP_UID_MIN,
+ .last = MAP_UID_MAX,
+ .name = "mapped",
+ .disposition = USER_REGULAR,
+ },
+};
+
+static int table_add_uid_boundaries(Table *table, const UidRange *p) {
+ int r;
+
+ assert(table);
+
+ for (size_t i = 0; i < ELEMENTSOF(uid_range_table); i++) {
+ _cleanup_free_ char *name = NULL, *comment = NULL;
+
+ if (!uid_range_covers(p, uid_range_table[i].first, uid_range_table[i].last - uid_range_table[i].first + 1))
+ continue;
+
+ name = strjoin(special_glyph(SPECIAL_GLYPH_ARROW_DOWN),
+ " begin ", uid_range_table[i].name, " users ",
+ special_glyph(SPECIAL_GLYPH_ARROW_DOWN));
+ if (!name)
+ return log_oom();
+
+ comment = strjoin("First ", uid_range_table[i].name, " user");
+ if (!comment)
+ return log_oom();
+
+ r = table_add_many(
+ table,
+ TABLE_STRING, special_glyph(SPECIAL_GLYPH_TREE_TOP),
+ TABLE_STRING, name,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_STRING, user_disposition_to_string(uid_range_table[i].disposition),
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_UID, uid_range_table[i].first,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_EMPTY,
+ TABLE_STRING, comment,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_EMPTY,
+ TABLE_EMPTY,
+ TABLE_INT, -1); /* sort before any other entry with the same UID */
+ if (r < 0)
+ return table_log_add_error(r);
+
+ free(name);
+ name = strjoin(special_glyph(SPECIAL_GLYPH_ARROW_UP),
+ " end ", uid_range_table[i].name, " users ",
+ special_glyph(SPECIAL_GLYPH_ARROW_UP));
+ if (!name)
+ return log_oom();
+
+ free(comment);
+ comment = strjoin("Last ", uid_range_table[i].name, " user");
+ if (!comment)
+ return log_oom();
+
+ r = table_add_many(
+ table,
+ TABLE_STRING, special_glyph(SPECIAL_GLYPH_TREE_RIGHT),
+ TABLE_STRING, name,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_STRING, user_disposition_to_string(uid_range_table[i].disposition),
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_UID, uid_range_table[i].last,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_EMPTY,
+ TABLE_STRING, comment,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_EMPTY,
+ TABLE_EMPTY,
+ TABLE_INT, 1); /* sort after any other entry with the same UID */
+ if (r < 0)
+ return table_log_add_error(r);
+ }
+
+ return ELEMENTSOF(uid_range_table) * 2;
+}
+
+static int add_unavailable_uid(Table *table, uid_t start, uid_t end) {
+ _cleanup_free_ char *name = NULL;
+ int r;
+
+ assert(table);
+ assert(start <= end);
+
+ name = strjoin(special_glyph(SPECIAL_GLYPH_ARROW_DOWN),
+ " begin unavailable users ",
+ special_glyph(SPECIAL_GLYPH_ARROW_DOWN));
+ if (!name)
+ return log_oom();
+
+ r = table_add_many(
+ table,
+ TABLE_STRING, special_glyph(SPECIAL_GLYPH_TREE_TOP),
+ TABLE_STRING, name,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_EMPTY,
+ TABLE_UID, start,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_EMPTY,
+ TABLE_STRING, "First unavailable user",
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_EMPTY,
+ TABLE_EMPTY,
+ TABLE_INT, -1); /* sort before an other entry with the same UID */
+ if (r < 0)
+ return table_log_add_error(r);
+
+ free(name);
+ name = strjoin(special_glyph(SPECIAL_GLYPH_ARROW_UP),
+ " end unavailable users ",
+ special_glyph(SPECIAL_GLYPH_ARROW_UP));
+ if (!name)
+ return log_oom();
+
+ r = table_add_many(
+ table,
+ TABLE_STRING, special_glyph(SPECIAL_GLYPH_TREE_RIGHT),
+ TABLE_STRING, name,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_EMPTY,
+ TABLE_UID, end,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_EMPTY,
+ TABLE_STRING, "Last unavailable user",
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_EMPTY,
+ TABLE_EMPTY,
+ TABLE_INT, 1); /* sort after any other entry with the same UID */
+ if (r < 0)
+ return table_log_add_error(r);
+
+ return 2;
+}
+
+static int table_add_uid_map(
+ Table *table,
+ const UidRange *p,
+ int (*add_unavailable)(Table *t, uid_t start, uid_t end)) {
+
+ uid_t focus = 0;
+ int n_added = 0, r;
+
+ assert(table);
+ assert(add_unavailable);
+
+ for (size_t i = 0; p && i < p->n_entries; i++) {
+ UidRangeEntry *x = p->entries + i;
+
+ if (focus < x->start) {
+ r = add_unavailable(table, focus, x->start-1);
+ if (r < 0)
+ return r;
+
+ n_added += r;
+ }
+
+ if (x->start > UINT32_MAX - x->nr) { /* overflow check */
+ focus = UINT32_MAX;
+ break;
+ }
+
+ focus = x->start + x->nr;
+ }
+
+ if (focus < UINT32_MAX-1) {
+ r = add_unavailable(table, focus, UINT32_MAX-1);
+ if (r < 0)
+ return r;
+
+ n_added += r;
+ }
+
+ return n_added;
+}
+
+static int display_user(int argc, char *argv[], void *userdata) {
+ _cleanup_(table_unrefp) Table *table = NULL;
+ bool draw_separator = false;
+ int ret = 0, r;
+
+ if (arg_output < 0)
+ arg_output = argc > 1 ? OUTPUT_FRIENDLY : OUTPUT_TABLE;
+
+ if (arg_output == OUTPUT_TABLE) {
+ table = table_new(" ", "name", "disposition", "uid", "gid", "realname", "home", "shell", "order");
+ if (!table)
+ return log_oom();
+
+ (void) table_set_align_percent(table, table_get_cell(table, 0, 3), 100);
+ (void) table_set_align_percent(table, table_get_cell(table, 0, 4), 100);
+ table_set_ersatz_string(table, TABLE_ERSATZ_DASH);
+ (void) table_set_sort(table, (size_t) 3, (size_t) 8);
+ (void) table_set_display(table, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 3, (size_t) 4, (size_t) 5, (size_t) 6, (size_t) 7);
+ }
+
+ if (argc > 1)
+ STRV_FOREACH(i, argv + 1) {
+ _cleanup_(user_record_unrefp) UserRecord *ur = NULL;
+ uid_t uid;
+
+ if (parse_uid(*i, &uid) >= 0)
+ r = userdb_by_uid(uid, arg_userdb_flags, &ur);
+ else
+ r = userdb_by_name(*i, arg_userdb_flags, &ur);
+ if (r < 0) {
+ if (r == -ESRCH)
+ log_error_errno(r, "User %s does not exist.", *i);
+ else if (r == -EHOSTDOWN)
+ log_error_errno(r, "Selected user database service is not available for this request.");
+ else
+ log_error_errno(r, "Failed to find user %s: %m", *i);
+
+ if (ret >= 0)
+ ret = r;
+ } else {
+ if (draw_separator && arg_output == OUTPUT_FRIENDLY)
+ putchar('\n');
+
+ r = show_user(ur, table);
+ if (r < 0)
+ return r;
+
+ draw_separator = true;
+ }
+ }
+ else {
+ _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL;
+
+ r = userdb_all(arg_userdb_flags, &iterator);
+ if (r == -ENOLINK) /* ENOLINK → Didn't find answer without Varlink, and didn't try Varlink because was configured to off. */
+ log_debug_errno(r, "No entries found. (Didn't check via Varlink.)");
+ else if (r == -ESRCH) /* ESRCH → Couldn't find any suitable entry, but we checked all sources */
+ log_debug_errno(r, "No entries found.");
+ else if (r < 0)
+ return log_error_errno(r, "Failed to enumerate users: %m");
+ else {
+ for (;;) {
+ _cleanup_(user_record_unrefp) UserRecord *ur = NULL;
+
+ r = userdb_iterator_get(iterator, &ur);
+ if (r == -ESRCH)
+ break;
+ if (r == -EHOSTDOWN)
+ return log_error_errno(r, "Selected user database service is not available for this request.");
+ if (r < 0)
+ return log_error_errno(r, "Failed acquire next user: %m");
+
+ if (draw_separator && arg_output == OUTPUT_FRIENDLY)
+ putchar('\n');
+
+ r = show_user(ur, table);
+ if (r < 0)
+ return r;
+
+ draw_separator = true;
+ }
+ }
+ }
+
+ if (table) {
+ _cleanup_(uid_range_freep) UidRange *uid_range = NULL;
+ int boundary_lines, uid_map_lines;
+
+ r = uid_range_load_userns(&uid_range, "/proc/self/uid_map");
+ if (r < 0)
+ log_debug_errno(r, "Failed to load /proc/self/uid_map, ignoring: %m");
+
+ boundary_lines = table_add_uid_boundaries(table, uid_range);
+ if (boundary_lines < 0)
+ return boundary_lines;
+
+ uid_map_lines = table_add_uid_map(table, uid_range, add_unavailable_uid);
+ if (uid_map_lines < 0)
+ return uid_map_lines;
+
+ if (table_get_rows(table) > 1) {
+ r = table_print_with_pager(table, arg_json_format_flags, arg_pager_flags, arg_legend);
+ if (r < 0)
+ return table_log_print_error(r);
+ }
+
+ if (arg_legend) {
+ size_t k;
+
+ k = table_get_rows(table) - 1 - boundary_lines - uid_map_lines;
+ if (k > 0)
+ printf("\n%zu users listed.\n", k);
+ else
+ printf("No users.\n");
+ }
+ }
+
+ return ret;
+}
+
+static int show_group(GroupRecord *gr, Table *table) {
+ int r;
+
+ assert(gr);
+
+ switch (arg_output) {
+
+ case OUTPUT_CLASSIC: {
+ _cleanup_free_ char *m = NULL;
+
+ if (!gid_is_valid(gr->gid))
+ break;
+
+ m = strv_join(gr->members, ",");
+ if (!m)
+ return log_oom();
+
+ printf("%s:x:" GID_FMT ":%s\n",
+ gr->group_name,
+ gr->gid,
+ m);
+ break;
+ }
+
+ case OUTPUT_JSON:
+ json_variant_dump(gr->json, arg_json_format_flags, NULL, 0);
+ break;
+
+ case OUTPUT_FRIENDLY:
+ group_record_show(gr, true);
+
+ if (gr->incomplete) {
+ fflush(stdout);
+ log_warning("Warning: lacking rights to acquire privileged fields of group record of '%s', output incomplete.", gr->group_name);
+ }
+
+ break;
+
+ case OUTPUT_TABLE: {
+ UserDisposition d;
+
+ assert(table);
+ d = group_record_disposition(gr);
+
+ r = table_add_many(
+ table,
+ TABLE_STRING, "",
+ TABLE_STRING, gr->group_name,
+ TABLE_SET_COLOR, user_disposition_to_color(d),
+ TABLE_STRING, user_disposition_to_string(d),
+ TABLE_GID, gr->gid,
+ TABLE_STRING, gr->description,
+ TABLE_INT, 0);
+ if (r < 0)
+ return table_log_add_error(r);
+
+ break;
+ }
+
+ default:
+ assert_not_reached();
+ }
+
+ return 0;
+}
+
+static int table_add_gid_boundaries(Table *table, const UidRange *p) {
+ int r;
+
+ assert(table);
+
+ for (size_t i = 0; i < ELEMENTSOF(uid_range_table); i++) {
+ _cleanup_free_ char *name = NULL, *comment = NULL;
+
+ if (!uid_range_covers(p, uid_range_table[i].first, uid_range_table[i].last))
+ continue;
+
+ name = strjoin(special_glyph(SPECIAL_GLYPH_ARROW_DOWN),
+ " begin ", uid_range_table[i].name, " groups ",
+ special_glyph(SPECIAL_GLYPH_ARROW_DOWN));
+ if (!name)
+ return log_oom();
+
+ comment = strjoin("First ", uid_range_table[i].name, " group");
+ if (!comment)
+ return log_oom();
+
+ r = table_add_many(
+ table,
+ TABLE_STRING, special_glyph(SPECIAL_GLYPH_TREE_TOP),
+ TABLE_STRING, name,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_STRING, user_disposition_to_string(uid_range_table[i].disposition),
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_GID, uid_range_table[i].first,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_STRING, comment,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_INT, -1); /* sort before any other entry with the same GID */
+ if (r < 0)
+ return table_log_add_error(r);
+
+ free(name);
+ name = strjoin(special_glyph(SPECIAL_GLYPH_ARROW_UP),
+ " end ", uid_range_table[i].name, " groups ",
+ special_glyph(SPECIAL_GLYPH_ARROW_UP));
+ if (!name)
+ return log_oom();
+
+ free(comment);
+ comment = strjoin("Last ", uid_range_table[i].name, " group");
+ if (!comment)
+ return log_oom();
+
+ r = table_add_many(
+ table,
+ TABLE_STRING, special_glyph(SPECIAL_GLYPH_TREE_RIGHT),
+ TABLE_STRING, name,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_STRING, user_disposition_to_string(uid_range_table[i].disposition),
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_GID, uid_range_table[i].last,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_STRING, comment,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_INT, 1); /* sort after any other entry with the same GID */
+ if (r < 0)
+ return table_log_add_error(r);
+ }
+
+ return ELEMENTSOF(uid_range_table) * 2;
+}
+
+static int add_unavailable_gid(Table *table, uid_t start, uid_t end) {
+ _cleanup_free_ char *name = NULL;
+ int r;
+
+ assert(table);
+ assert(start <= end);
+
+ name = strjoin(special_glyph(SPECIAL_GLYPH_ARROW_DOWN),
+ " begin unavailable groups ",
+ special_glyph(SPECIAL_GLYPH_ARROW_DOWN));
+ if (!name)
+ return log_oom();
+
+ r = table_add_many(
+ table,
+ TABLE_STRING, special_glyph(SPECIAL_GLYPH_TREE_TOP),
+ TABLE_STRING, name,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_EMPTY,
+ TABLE_GID, start,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_STRING, "First unavailable group",
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_INT, -1); /* sort before any other entry with the same GID */
+ if (r < 0)
+ return table_log_add_error(r);
+
+ free(name);
+ name = strjoin(special_glyph(SPECIAL_GLYPH_ARROW_UP),
+ " end unavailable groups ",
+ special_glyph(SPECIAL_GLYPH_ARROW_UP));
+ if (!name)
+ return log_oom();
+
+ r = table_add_many(
+ table,
+ TABLE_STRING, special_glyph(SPECIAL_GLYPH_TREE_RIGHT),
+ TABLE_STRING, name,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_EMPTY,
+ TABLE_GID, end,
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_STRING, "Last unavailable group",
+ TABLE_SET_COLOR, ansi_grey(),
+ TABLE_INT, 1); /* sort after any other entry with the same GID */
+ if (r < 0)
+ return table_log_add_error(r);
+
+ return 2;
+}
+
+static int display_group(int argc, char *argv[], void *userdata) {
+ _cleanup_(table_unrefp) Table *table = NULL;
+ bool draw_separator = false;
+ int ret = 0, r;
+
+ if (arg_output < 0)
+ arg_output = argc > 1 ? OUTPUT_FRIENDLY : OUTPUT_TABLE;
+
+ if (arg_output == OUTPUT_TABLE) {
+ table = table_new(" ", "name", "disposition", "gid", "description", "order");
+ if (!table)
+ return log_oom();
+
+ (void) table_set_align_percent(table, table_get_cell(table, 0, 3), 100);
+ table_set_ersatz_string(table, TABLE_ERSATZ_DASH);
+ (void) table_set_sort(table, (size_t) 3, (size_t) 5);
+ (void) table_set_display(table, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 3, (size_t) 4);
+ }
+
+ if (argc > 1)
+ STRV_FOREACH(i, argv + 1) {
+ _cleanup_(group_record_unrefp) GroupRecord *gr = NULL;
+ gid_t gid;
+
+ if (parse_gid(*i, &gid) >= 0)
+ r = groupdb_by_gid(gid, arg_userdb_flags, &gr);
+ else
+ r = groupdb_by_name(*i, arg_userdb_flags, &gr);
+ if (r < 0) {
+ if (r == -ESRCH)
+ log_error_errno(r, "Group %s does not exist.", *i);
+ else if (r == -EHOSTDOWN)
+ log_error_errno(r, "Selected group database service is not available for this request.");
+ else
+ log_error_errno(r, "Failed to find group %s: %m", *i);
+
+ if (ret >= 0)
+ ret = r;
+ } else {
+ if (draw_separator && arg_output == OUTPUT_FRIENDLY)
+ putchar('\n');
+
+ r = show_group(gr, table);
+ if (r < 0)
+ return r;
+
+ draw_separator = true;
+ }
+ }
+ else {
+ _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL;
+
+ r = groupdb_all(arg_userdb_flags, &iterator);
+ if (r == -ENOLINK)
+ log_debug_errno(r, "No entries found. (Didn't check via Varlink.)");
+ else if (r == -ESRCH)
+ log_debug_errno(r, "No entries found.");
+ else if (r < 0)
+ return log_error_errno(r, "Failed to enumerate groups: %m");
+ else {
+ for (;;) {
+ _cleanup_(group_record_unrefp) GroupRecord *gr = NULL;
+
+ r = groupdb_iterator_get(iterator, &gr);
+ if (r == -ESRCH)
+ break;
+ if (r == -EHOSTDOWN)
+ return log_error_errno(r, "Selected group database service is not available for this request.");
+ if (r < 0)
+ return log_error_errno(r, "Failed acquire next group: %m");
+
+ if (draw_separator && arg_output == OUTPUT_FRIENDLY)
+ putchar('\n');
+
+ r = show_group(gr, table);
+ if (r < 0)
+ return r;
+
+ draw_separator = true;
+ }
+ }
+ }
+
+ if (table) {
+ _cleanup_(uid_range_freep) UidRange *gid_range = NULL;
+ int boundary_lines, gid_map_lines;
+
+ r = uid_range_load_userns(&gid_range, "/proc/self/gid_map");
+ if (r < 0)
+ log_debug_errno(r, "Failed to load /proc/self/gid_map, ignoring: %m");
+
+ boundary_lines = table_add_gid_boundaries(table, gid_range);
+ if (boundary_lines < 0)
+ return boundary_lines;
+
+ gid_map_lines = table_add_uid_map(table, gid_range, add_unavailable_gid);
+ if (gid_map_lines < 0)
+ return gid_map_lines;
+
+ if (table_get_rows(table) > 1) {
+ r = table_print_with_pager(table, arg_json_format_flags, arg_pager_flags, arg_legend);
+ if (r < 0)
+ return table_log_print_error(r);
+ }
+
+ if (arg_legend) {
+ size_t k;
+
+ k = table_get_rows(table) - 1 - boundary_lines - gid_map_lines;
+ if (k > 0)
+ printf("\n%zu groups listed.\n", k);
+ else
+ printf("No groups.\n");
+ }
+ }
+
+ return ret;
+}
+
+static int show_membership(const char *user, const char *group, Table *table) {
+ int r;
+
+ assert(user);
+ assert(group);
+
+ switch (arg_output) {
+
+ case OUTPUT_CLASSIC:
+ /* Strictly speaking there's no 'classic' output for this concept, but let's output it in
+ * similar style to the classic output for user/group info */
+
+ printf("%s:%s\n", user, group);
+ break;
+
+ case OUTPUT_JSON: {
+ _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
+
+ r = json_build(&v, JSON_BUILD_OBJECT(
+ JSON_BUILD_PAIR("user", JSON_BUILD_STRING(user)),
+ JSON_BUILD_PAIR("group", JSON_BUILD_STRING(group))));
+ if (r < 0)
+ return log_error_errno(r, "Failed to build JSON object: %m");
+
+ json_variant_dump(v, arg_json_format_flags, NULL, NULL);
+ break;
+ }
+
+ case OUTPUT_FRIENDLY:
+ /* Hmm, this is not particularly friendly, but not sure how we could do this better */
+ printf("%s: %s\n", group, user);
+ break;
+
+ case OUTPUT_TABLE:
+ assert(table);
+
+ r = table_add_many(
+ table,
+ TABLE_STRING, user,
+ TABLE_STRING, group);
+ if (r < 0)
+ return table_log_add_error(r);
+
+ break;
+
+ default:
+ assert_not_reached();
+ }
+
+ return 0;
+}
+
+static int display_memberships(int argc, char *argv[], void *userdata) {
+ _cleanup_(table_unrefp) Table *table = NULL;
+ int ret = 0, r;
+
+ if (arg_output < 0)
+ arg_output = OUTPUT_TABLE;
+
+ if (arg_output == OUTPUT_TABLE) {
+ table = table_new("user", "group");
+ if (!table)
+ return log_oom();
+
+ (void) table_set_sort(table, (size_t) 0, (size_t) 1);
+ }
+
+ if (argc > 1)
+ STRV_FOREACH(i, argv + 1) {
+ _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL;
+
+ if (streq(argv[0], "users-in-group")) {
+ r = membershipdb_by_group(*i, arg_userdb_flags, &iterator);
+ if (r < 0)
+ return log_error_errno(r, "Failed to enumerate users in group: %m");
+ } else if (streq(argv[0], "groups-of-user")) {
+ r = membershipdb_by_user(*i, arg_userdb_flags, &iterator);
+ if (r < 0)
+ return log_error_errno(r, "Failed to enumerate groups of user: %m");
+ } else
+ assert_not_reached();
+
+ for (;;) {
+ _cleanup_free_ char *user = NULL, *group = NULL;
+
+ r = membershipdb_iterator_get(iterator, &user, &group);
+ if (r == -ESRCH)
+ break;
+ if (r == -EHOSTDOWN)
+ return log_error_errno(r, "Selected membership database service is not available for this request.");
+ if (r < 0)
+ return log_error_errno(r, "Failed acquire next membership: %m");
+
+ r = show_membership(user, group, table);
+ if (r < 0)
+ return r;
+ }
+ }
+ else {
+ _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL;
+
+ r = membershipdb_all(arg_userdb_flags, &iterator);
+ if (r == -ENOLINK)
+ log_debug_errno(r, "No entries found. (Didn't check via Varlink.)");
+ else if (r == -ESRCH)
+ log_debug_errno(r, "No entries found.");
+ else if (r < 0)
+ return log_error_errno(r, "Failed to enumerate memberships: %m");
+ else {
+ for (;;) {
+ _cleanup_free_ char *user = NULL, *group = NULL;
+
+ r = membershipdb_iterator_get(iterator, &user, &group);
+ if (r == -ESRCH)
+ break;
+ if (r == -EHOSTDOWN)
+ return log_error_errno(r, "Selected membership database service is not available for this request.");
+ if (r < 0)
+ return log_error_errno(r, "Failed acquire next membership: %m");
+
+ r = show_membership(user, group, table);
+ if (r < 0)
+ return r;
+ }
+ }
+ }
+
+ if (table) {
+ if (table_get_rows(table) > 1) {
+ r = table_print_with_pager(table, arg_json_format_flags, arg_pager_flags, arg_legend);
+ if (r < 0)
+ return table_log_print_error(r);
+ }
+
+ if (arg_legend) {
+ if (table_get_rows(table) > 1)
+ printf("\n%zu memberships listed.\n", table_get_rows(table) - 1);
+ else
+ printf("No memberships.\n");
+ }
+ }
+
+ return ret;
+}
+
+static int display_services(int argc, char *argv[], void *userdata) {
+ _cleanup_(table_unrefp) Table *t = NULL;
+ _cleanup_closedir_ DIR *d = NULL;
+ int r;
+
+ d = opendir("/run/systemd/userdb/");
+ if (!d) {
+ if (errno == ENOENT) {
+ log_info("No services.");
+ return 0;
+ }
+
+ return log_error_errno(errno, "Failed to open /run/systemd/userdb/: %m");
+ }
+
+ t = table_new("service", "listening");
+ if (!t)
+ return log_oom();
+
+ (void) table_set_sort(t, (size_t) 0);
+
+ FOREACH_DIRENT(de, d, return -errno) {
+ _cleanup_free_ char *j = NULL, *no = NULL;
+ _cleanup_close_ int fd = -EBADF;
+
+ j = path_join("/run/systemd/userdb/", de->d_name);
+ if (!j)
+ return log_oom();
+
+ fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ if (fd < 0)
+ return log_error_errno(errno, "Failed to allocate AF_UNIX/SOCK_STREAM socket: %m");
+
+ r = connect_unix_path(fd, dirfd(d), de->d_name);
+ if (r < 0) {
+ no = strjoin("No (", errno_to_name(r), ")");
+ if (!no)
+ return log_oom();
+ }
+
+ r = table_add_many(t,
+ TABLE_STRING, de->d_name,
+ TABLE_STRING, no ?: "yes",
+ TABLE_SET_COLOR, no ? ansi_highlight_red() : ansi_highlight_green());
+ if (r < 0)
+ return table_log_add_error(r);
+ }
+
+ if (table_get_rows(t) > 1) {
+ r = table_print_with_pager(t, arg_json_format_flags, arg_pager_flags, arg_legend);
+ if (r < 0)
+ return table_log_print_error(r);
+ }
+
+ if (arg_legend && arg_output != OUTPUT_JSON) {
+ if (table_get_rows(t) > 1)
+ printf("\n%zu services listed.\n", table_get_rows(t) - 1);
+ else
+ printf("No services.\n");
+ }
+
+ return 0;
+}
+
+static int ssh_authorized_keys(int argc, char *argv[], void *userdata) {
+ _cleanup_(user_record_unrefp) UserRecord *ur = NULL;
+ char **chain_invocation;
+ int r;
+
+ assert(argc >= 2);
+
+ if (arg_chain) {
+ /* If --chain is specified, the rest of the command line is the chain command */
+
+ if (argc < 3)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "No chain command line specified, refusing.");
+
+ /* Make similar restrictions on the chain command as OpenSSH itself makes on the primary command. */
+ if (!path_is_absolute(argv[2]))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Chain invocation of ssh-authorized-keys commands requires an absolute binary path argument.");
+
+ if (!path_is_normalized(argv[2]))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Chain invocation of ssh-authorized-keys commands requires an normalized binary path argument.");
+
+ chain_invocation = argv + 2;
+ } else {
+ /* If --chain is not specified, then refuse any further arguments */
+
+ if (argc > 2)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Too many arguments.");
+
+ chain_invocation = NULL;
+ }
+
+ r = userdb_by_name(argv[1], arg_userdb_flags, &ur);
+ if (r == -ESRCH)
+ log_error_errno(r, "User %s does not exist.", argv[1]);
+ else if (r == -EHOSTDOWN)
+ log_error_errno(r, "Selected user database service is not available for this request.");
+ else if (r == -EINVAL)
+ log_error_errno(r, "Failed to find user %s: %m (Invalid user name?)", argv[1]);
+ else if (r < 0)
+ log_error_errno(r, "Failed to find user %s: %m", argv[1]);
+ else {
+ if (strv_isempty(ur->ssh_authorized_keys))
+ log_debug("User record for %s has no public SSH keys.", argv[1]);
+ else
+ STRV_FOREACH(i, ur->ssh_authorized_keys)
+ printf("%s\n", *i);
+
+ if (ur->incomplete) {
+ fflush(stdout);
+ log_warning("Warning: lacking rights to acquire privileged fields of user record of '%s', output incomplete.", ur->user_name);
+ }
+ }
+
+ if (chain_invocation) {
+ if (DEBUG_LOGGING) {
+ _cleanup_free_ char *s = NULL;
+
+ s = quote_command_line(chain_invocation, SHELL_ESCAPE_EMPTY);
+ if (!s)
+ return log_oom();
+
+ log_debug("Chain invoking: %s", s);
+ }
+
+ fflush(stdout);
+ execv(chain_invocation[0], chain_invocation);
+ if (errno == ENOENT) /* Let's handle ENOENT gracefully */
+ log_warning_errno(errno, "Chain executable '%s' does not exist, ignoring chain invocation.", chain_invocation[0]);
+ else {
+ log_error_errno(errno, "Failed to invoke chain executable '%s': %m", chain_invocation[0]);
+ if (r >= 0)
+ r = -errno;
+ }
+ }
+
+ return r;
+}
+
+static int help(int argc, char *argv[], void *userdata) {
+ _cleanup_free_ char *link = NULL;
+ int r;
+
+ pager_open(arg_pager_flags);
+
+ r = terminal_urlify_man("userdbctl", "1", &link);
+ if (r < 0)
+ return log_oom();
+
+ printf("%s [OPTIONS...] COMMAND ...\n\n"
+ "%sShow user and group information.%s\n"
+ "\nCommands:\n"
+ " user [USER…] Inspect user\n"
+ " group [GROUP…] Inspect group\n"
+ " users-in-group [GROUP…] Show users that are members of specified groups\n"
+ " groups-of-user [USER…] Show groups the specified users are members of\n"
+ " services Show enabled database services\n"
+ " ssh-authorized-keys USER Show SSH authorized keys for user\n"
+ "\nOptions:\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " --no-pager Do not pipe output into a pager\n"
+ " --no-legend Do not show the headers and footers\n"
+ " --output=MODE Select output mode (classic, friendly, table, json)\n"
+ " -j Equivalent to --output=json\n"
+ " -s --service=SERVICE[:SERVICE…]\n"
+ " Query the specified service\n"
+ " --with-nss=BOOL Control whether to include glibc NSS data\n"
+ " -N Do not synthesize or include glibc NSS data\n"
+ " (Same as --synthesize=no --with-nss=no)\n"
+ " --synthesize=BOOL Synthesize root/nobody user\n"
+ " --with-dropin=BOOL Control whether to include drop-in records\n"
+ " --with-varlink=BOOL Control whether to talk to services at all\n"
+ " --multiplexer=BOOL Control whether to use the multiplexer\n"
+ " --json=pretty|short JSON output mode\n"
+ " --chain Chain another command\n"
+ "\nSee the %s for details.\n",
+ program_invocation_short_name,
+ ansi_highlight(),
+ ansi_normal(),
+ link);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_NO_PAGER,
+ ARG_NO_LEGEND,
+ ARG_OUTPUT,
+ ARG_WITH_NSS,
+ ARG_WITH_DROPIN,
+ ARG_WITH_VARLINK,
+ ARG_SYNTHESIZE,
+ ARG_MULTIPLEXER,
+ ARG_JSON,
+ ARG_CHAIN,
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ { "no-legend", no_argument, NULL, ARG_NO_LEGEND },
+ { "output", required_argument, NULL, ARG_OUTPUT },
+ { "service", required_argument, NULL, 's' },
+ { "with-nss", required_argument, NULL, ARG_WITH_NSS },
+ { "with-dropin", required_argument, NULL, ARG_WITH_DROPIN },
+ { "with-varlink", required_argument, NULL, ARG_WITH_VARLINK },
+ { "synthesize", required_argument, NULL, ARG_SYNTHESIZE },
+ { "multiplexer", required_argument, NULL, ARG_MULTIPLEXER },
+ { "json", required_argument, NULL, ARG_JSON },
+ { "chain", no_argument, NULL, ARG_CHAIN },
+ {}
+ };
+
+ const char *e;
+ int r;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ /* We are going to update this environment variable with our own, hence let's first read what is already set */
+ e = getenv("SYSTEMD_ONLY_USERDB");
+ if (e) {
+ char **l;
+
+ l = strv_split(e, ":");
+ if (!l)
+ return log_oom();
+
+ strv_free(arg_services);
+ arg_services = l;
+ }
+
+ /* Resetting to 0 forces the invocation of an internal initialization routine of getopt_long()
+ * that checks for GNU extensions in optstring ('-' or '+' at the beginning). */
+ optind = 0;
+
+ for (;;) {
+ int c;
+
+ c = getopt_long(argc, argv,
+ arg_chain ? "+hjs:N" : "hjs:N", /* When --chain was used disable parsing of further switches */
+ options, NULL);
+ if (c < 0)
+ break;
+
+ switch (c) {
+
+ case 'h':
+ return help(0, NULL, NULL);
+
+ case ARG_VERSION:
+ return version();
+
+ case ARG_NO_PAGER:
+ arg_pager_flags |= PAGER_DISABLE;
+ break;
+
+ case ARG_NO_LEGEND:
+ arg_legend = false;
+ break;
+
+ case ARG_OUTPUT:
+ if (isempty(optarg))
+ arg_output = _OUTPUT_INVALID;
+ else if (streq(optarg, "classic"))
+ arg_output = OUTPUT_CLASSIC;
+ else if (streq(optarg, "friendly"))
+ arg_output = OUTPUT_FRIENDLY;
+ else if (streq(optarg, "json"))
+ arg_output = OUTPUT_JSON;
+ else if (streq(optarg, "table"))
+ arg_output = OUTPUT_TABLE;
+ else if (streq(optarg, "help")) {
+ puts("classic\n"
+ "friendly\n"
+ "json\n"
+ "table");
+ return 0;
+ } else
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid --output= mode: %s", optarg);
+
+ arg_json_format_flags = arg_output == OUTPUT_JSON ? JSON_FORMAT_PRETTY|JSON_FORMAT_COLOR_AUTO : JSON_FORMAT_OFF;
+ break;
+
+ case ARG_JSON:
+ r = parse_json_argument(optarg, &arg_json_format_flags);
+ if (r <= 0)
+ return r;
+
+ arg_output = FLAGS_SET(arg_json_format_flags, JSON_FORMAT_OFF) ? _OUTPUT_INVALID : OUTPUT_JSON;
+ break;
+
+ case 'j':
+ arg_json_format_flags = JSON_FORMAT_PRETTY|JSON_FORMAT_COLOR_AUTO;
+ arg_output = OUTPUT_JSON;
+ break;
+
+ case 's':
+ if (isempty(optarg))
+ arg_services = strv_free(arg_services);
+ else {
+ _cleanup_strv_free_ char **l = NULL;
+
+ l = strv_split(optarg, ":");
+ if (!l)
+ return log_oom();
+
+ r = strv_extend_strv(&arg_services, l, true);
+ if (r < 0)
+ return log_oom();
+ }
+
+ break;
+
+ case 'N':
+ arg_userdb_flags |= USERDB_EXCLUDE_NSS|USERDB_DONT_SYNTHESIZE;
+ break;
+
+ case ARG_WITH_NSS:
+ r = parse_boolean_argument("--with-nss=", optarg, NULL);
+ if (r < 0)
+ return r;
+
+ SET_FLAG(arg_userdb_flags, USERDB_EXCLUDE_NSS, !r);
+ break;
+
+ case ARG_WITH_DROPIN:
+ r = parse_boolean_argument("--with-dropin=", optarg, NULL);
+ if (r < 0)
+ return r;
+
+ SET_FLAG(arg_userdb_flags, USERDB_EXCLUDE_DROPIN, !r);
+ break;
+
+ case ARG_WITH_VARLINK:
+ r = parse_boolean_argument("--with-varlink=", optarg, NULL);
+ if (r < 0)
+ return r;
+
+ SET_FLAG(arg_userdb_flags, USERDB_EXCLUDE_VARLINK, !r);
+ break;
+
+ case ARG_SYNTHESIZE:
+ r = parse_boolean_argument("--synthesize=", optarg, NULL);
+ if (r < 0)
+ return r;
+
+ SET_FLAG(arg_userdb_flags, USERDB_DONT_SYNTHESIZE, !r);
+ break;
+
+ case ARG_MULTIPLEXER:
+ r = parse_boolean_argument("--multiplexer=", optarg, NULL);
+ if (r < 0)
+ return r;
+
+ SET_FLAG(arg_userdb_flags, USERDB_AVOID_MULTIPLEXER, !r);
+ break;
+
+ case ARG_CHAIN:
+ arg_chain = true;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached();
+ }
+ }
+
+ return 1;
+}
+
+static int run(int argc, char *argv[]) {
+ static const Verb verbs[] = {
+ { "help", VERB_ANY, VERB_ANY, 0, help },
+ { "user", VERB_ANY, VERB_ANY, VERB_DEFAULT, display_user },
+ { "group", VERB_ANY, VERB_ANY, 0, display_group },
+ { "users-in-group", VERB_ANY, VERB_ANY, 0, display_memberships },
+ { "groups-of-user", VERB_ANY, VERB_ANY, 0, display_memberships },
+ { "services", VERB_ANY, 1, 0, display_services },
+
+ /* This one is a helper for sshd_config's AuthorizedKeysCommand= setting, it's not a
+ * user-facing verb and thus should not appear in man pages or --help texts. */
+ { "ssh-authorized-keys", 2, VERB_ANY, 0, ssh_authorized_keys },
+ {}
+ };
+
+ int r;
+
+ log_setup();
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ return r;
+
+ if (arg_services) {
+ _cleanup_free_ char *e = NULL;
+
+ e = strv_join(arg_services, ":");
+ if (!e)
+ return log_oom();
+
+ if (setenv("SYSTEMD_ONLY_USERDB", e, true) < 0)
+ return log_error_errno(r, "Failed to set $SYSTEMD_ONLY_USERDB: %m");
+
+ log_info("Enabled services: %s", e);
+ } else
+ assert_se(unsetenv("SYSTEMD_ONLY_USERDB") == 0);
+
+ return dispatch_verb(argc, argv, verbs, NULL);
+}
+
+DEFINE_MAIN_FUNCTION(run);