diff options
Diffstat (limited to 'src/userdb/userdbctl.c')
| -rw-r--r-- | src/userdb/userdbctl.c | 1334 |
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); |