X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Flogin%2Flogind-dbus.c;h=bc985a3754b552e62b2247c6f57bbaa19753afb9;hp=0af67148af00a3b3e0c9bfe1378f9db6d6626979;hb=8cb4ab0058e51f1fba93683d145ef95f97c2fa86;hpb=6a0f1f6d5af7c7300d3db7a0ba2b068f8abd222b diff --git a/src/login/logind-dbus.c b/src/login/logind-dbus.c index 0af67148a..bc985a375 100644 --- a/src/login/logind-dbus.c +++ b/src/login/logind-dbus.c @@ -23,7 +23,6 @@ #include #include #include -#include #include "sd-id128.h" #include "sd-messages.h" @@ -40,9 +39,95 @@ #include "audit.h" #include "bus-util.h" #include "bus-error.h" -#include "logind.h" -#include "bus-errors.h" +#include "bus-common-errors.h" #include "udev-util.h" +#include "selinux-util.h" +#include "logind.h" + +int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) { + _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; + Session *session; + int r; + + assert(m); + assert(message); + assert(ret); + + if (isempty(name)) { + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_session(creds, &name); + if (r < 0) + return r; + } + + session = hashmap_get(m->sessions, name); + if (!session) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name); + + *ret = session; + return 0; +} + +int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) { + User *user; + int r; + + assert(m); + assert(message); + assert(ret); + + if (uid == UID_INVALID) { + _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; + + /* Note that we get the owner UID of the session, not the actual client UID here! */ + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_owner_uid(creds, &uid); + if (r < 0) + return r; + } + + user = hashmap_get(m->users, UID_TO_PTR(uid)); + if (!user) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "No user "UID_FMT" known or logged in", uid); + + *ret = user; + return 0; +} + +int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret) { + Seat *seat; + int r; + + assert(m); + assert(message); + assert(ret); + + if (isempty(name)) { + Session *session; + + r = manager_get_session_from_creds(m, message, NULL, error, &session); + if (r < 0) + return r; + + seat = session->seat; + + if (!seat) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session has no seat."); + } else { + seat = hashmap_get(m->seats, name); + if (!seat) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name); + } + + *ret = seat; + return 0; +} static int property_get_idle_hint( sd_bus *bus, @@ -131,6 +216,7 @@ static int property_get_preparing( static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction); static int method_get_session(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; _cleanup_free_ char *p = NULL; Manager *m = userdata; const char *name; @@ -145,9 +231,9 @@ static int method_get_session(sd_bus *bus, sd_bus_message *message, void *userda if (r < 0) return r; - session = hashmap_get(m->sessions, name); - if (!session) - return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name); + r = manager_get_session_from_creds(m, message, name, error, &session); + if (r < 0) + return r; p = session_bus_path(session); if (!p) @@ -173,23 +259,18 @@ static int method_get_session_by_pid(sd_bus *bus, sd_bus_message *message, void if (r < 0) return r; - if (pid == 0) { - _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; - - r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds); + if (pid <= 0) { + r = manager_get_session_from_creds(m, message, NULL, error, &session); if (r < 0) return r; - - r = sd_bus_creds_get_pid(creds, &pid); + } else { + r = manager_get_session_by_pid(m, pid, &session); if (r < 0) return r; - } - r = manager_get_session_by_pid(m, pid, &session); - if (r < 0) - return r; - if (!session) - return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID %lu does not belong to any known session", (unsigned long) pid); + if (!session) + return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid); + } p = session_bus_path(session); if (!p) @@ -213,9 +294,9 @@ static int method_get_user(sd_bus *bus, sd_bus_message *message, void *userdata, if (r < 0) return r; - user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid)); - if (!user) - return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "No user '%lu' known or logged in", (unsigned long) uid); + r = manager_get_user_from_creds(m, message, uid, error, &user); + if (r < 0) + return r; p = user_bus_path(user); if (!p) @@ -241,24 +322,18 @@ static int method_get_user_by_pid(sd_bus *bus, sd_bus_message *message, void *us if (r < 0) return r; - if (pid == 0) { - _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; - - r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds); + if (pid <= 0) { + r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user); if (r < 0) return r; - - r = sd_bus_creds_get_pid(creds, &pid); + } else { + r = manager_get_user_by_pid(m, pid, &user); if (r < 0) return r; + if (!user) + return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID, "PID "PID_FMT" does not belong to any known or logged in user", pid); } - r = manager_get_user_by_pid(m, pid, &user); - if (r < 0) - return r; - if (!user) - return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID, "PID %lu does not belong to any known or logged in user", (unsigned long) pid); - p = user_bus_path(user); if (!p) return -ENOMEM; @@ -281,9 +356,9 @@ static int method_get_seat(sd_bus *bus, sd_bus_message *message, void *userdata, if (r < 0) return r; - seat = hashmap_get(m->seats, name); - if (!seat) - return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name); + r = manager_get_seat_from_creds(m, message, name, error, &seat); + if (r < 0) + return r; p = seat_bus_path(seat); if (!p) @@ -570,8 +645,6 @@ static int method_create_session(sd_bus *bus, sd_bus_message *message, void *use if (r < 0) return r; - assert_cc(sizeof(uint32_t) == sizeof(pid_t)); - r = sd_bus_creds_get_pid(creds, (pid_t*) &leader); if (r < 0) return r; @@ -621,7 +694,7 @@ static int method_create_session(sd_bus *bus, sd_bus_message *message, void *use if (audit_id > 0) { /* Keep our session IDs and the audit session IDs in sync */ - if (asprintf(&id, "%lu", (unsigned long) audit_id) < 0) + if (asprintf(&id, "%"PRIu32, audit_id) < 0) return -ENOMEM; /* Wut? There's already a session by this name and we @@ -727,7 +800,7 @@ static int method_create_session(sd_bus *bus, sd_bus_message *message, void *use /* Now, let's wait until the slice unit and stuff got * created. We send the reply back from - * session_send_create_reply().*/ + * session_send_create_reply(). */ return 1; @@ -755,9 +828,9 @@ static int method_release_session(sd_bus *bus, sd_bus_message *message, void *us if (r < 0) return r; - session = hashmap_get(m->sessions, name); - if (!session) - return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name); + r = manager_get_session_from_creds(m, message, name, error, &session); + if (r < 0) + return r; session_release(session); @@ -778,9 +851,9 @@ static int method_activate_session(sd_bus *bus, sd_bus_message *message, void *u if (r < 0) return r; - session = hashmap_get(m->sessions, name); - if (!session) - return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name); + r = manager_get_session_from_creds(m, message, name, error, &session); + if (r < 0) + return r; r = session_activate(session); if (r < 0) @@ -807,13 +880,13 @@ static int method_activate_session_on_seat(sd_bus *bus, sd_bus_message *message, if (r < 0) return r; - session = hashmap_get(m->sessions, session_name); - if (!session) - return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", session_name); + r = manager_get_session_from_creds(m, message, session_name, error, &session); + if (r < 0) + return r; - seat = hashmap_get(m->seats, seat_name); - if (!seat) - return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", seat_name); + r = manager_get_seat_from_creds(m, message, seat_name, error, &seat); + if (r < 0) + return r; if (session->seat != seat) return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name); @@ -839,9 +912,9 @@ static int method_lock_session(sd_bus *bus, sd_bus_message *message, void *userd if (r < 0) return r; - session = hashmap_get(m->sessions, name); - if (!session) - return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name); + r = manager_get_session_from_creds(m, message, name, error, &session); + if (r < 0) + return r; r = session_send_lock(session, streq(sd_bus_message_get_member(message), "LockSession")); if (r < 0) @@ -866,6 +939,7 @@ static int method_lock_sessions(sd_bus *bus, sd_bus_message *message, void *user } static int method_kill_session(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; const char *name, *swho; Manager *m = userdata; Session *session; @@ -892,9 +966,9 @@ static int method_kill_session(sd_bus *bus, sd_bus_message *message, void *userd if (signo <= 0 || signo >= _NSIG) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo); - session = hashmap_get(m->sessions, name); - if (!session) - return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name); + r = manager_get_session_from_creds(m, message, name, error, &session); + if (r < 0) + return r; r = session_kill(session, who, signo); if (r < 0) @@ -921,9 +995,9 @@ static int method_kill_user(sd_bus *bus, sd_bus_message *message, void *userdata if (signo <= 0 || signo >= _NSIG) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo); - user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid)); - if (!user) - return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "No user '%lu' known or logged in", (unsigned long) uid); + r = manager_get_user_from_creds(m, message, uid, error, &user); + if (r < 0) + return r; r = user_kill(user, signo); if (r < 0) @@ -933,6 +1007,7 @@ static int method_kill_user(sd_bus *bus, sd_bus_message *message, void *userdata } static int method_terminate_session(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; Manager *m = userdata; const char *name; Session *session; @@ -946,9 +1021,9 @@ static int method_terminate_session(sd_bus *bus, sd_bus_message *message, void * if (r < 0) return r; - session = hashmap_get(m->sessions, name); - if (!session) - return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name); + r = manager_get_session_from_creds(m, message, name, error, &session); + if (r < 0) + return r; r = session_stop(session, true); if (r < 0) @@ -971,9 +1046,9 @@ static int method_terminate_user(sd_bus *bus, sd_bus_message *message, void *use if (r < 0) return r; - user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid)); - if (!user) - return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "No user '%lu' known or logged in", (unsigned long) uid); + r = manager_get_user_from_creds(m, message, uid, error, &user); + if (r < 0) + return r; r = user_stop(user, true); if (r < 0) @@ -996,9 +1071,9 @@ static int method_terminate_seat(sd_bus *bus, sd_bus_message *message, void *use if (r < 0) return r; - seat = hashmap_get(m->seats, name); - if (!seat) - return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name); + r = manager_get_seat_from_creds(m, message, name, error, &seat); + if (r < 0) + return r; r = seat_stop_sessions(seat, true); if (r < 0) @@ -1024,18 +1099,31 @@ static int method_set_user_linger(sd_bus *bus, sd_bus_message *message, void *us if (r < 0) return r; + if (uid == UID_INVALID) { + _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; + + /* Note that we get the owner UID of the session, not the actual client UID here! */ + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_owner_uid(creds, &uid); + if (r < 0) + return r; + } + errno = 0; pw = getpwuid(uid); if (!pw) return errno ? -errno : -ENOENT; - r = bus_verify_polkit_async(bus, - &m->polkit_registry, - message, - "org.freedesktop.login1.set-user-linger", - interactive, - error, - method_set_user_linger, m); + r = bus_verify_polkit_async( + message, + CAP_SYS_ADMIN, + "org.freedesktop.login1.set-user-linger", + interactive, + &m->polkit_registry, + error); if (r < 0) return r; if (r == 0) @@ -1069,7 +1157,7 @@ static int method_set_user_linger(sd_bus *bus, sd_bus_message *message, void *us if (r < 0 && errno != ENOENT) return -errno; - u = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid)); + u = hashmap_get(m->users, UID_TO_PTR(uid)); if (u) user_add_to_gc_queue(u); } @@ -1143,7 +1231,7 @@ static int attach_device(Manager *m, const char *seat, const char *sysfs) { return -ENOMEM; mkdir_p_label("/etc/udev/rules.d", 0755); - label_init("/etc"); + mac_selinux_init("/etc"); r = write_string_file_atomic_label(file, rule); if (r < 0) return r; @@ -1159,7 +1247,7 @@ static int flush_devices(Manager *m) { d = opendir("/etc/udev/rules.d"); if (!d) { if (errno != ENOENT) - log_warning("Failed to open /etc/udev/rules.d: %m"); + log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m"); } else { struct dirent *de; @@ -1175,7 +1263,7 @@ static int flush_devices(Manager *m) { continue; if (unlinkat(dirfd(d), de->d_name, 0) < 0) - log_warning("Failed to unlink %s: %m", de->d_name); + log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name); } } @@ -1201,13 +1289,13 @@ static int method_attach_device(sd_bus *bus, sd_bus_message *message, void *user if (!seat_name_is_valid(seat)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat); - r = bus_verify_polkit_async(bus, - &m->polkit_registry, - message, - "org.freedesktop.login1.attach-device", - interactive, - error, - method_attach_device, m); + r = bus_verify_polkit_async( + message, + CAP_SYS_ADMIN, + "org.freedesktop.login1.attach-device", + interactive, + &m->polkit_registry, + error); if (r < 0) return r; if (r == 0) @@ -1232,13 +1320,13 @@ static int method_flush_devices(sd_bus *bus, sd_bus_message *message, void *user if (r < 0) return r; - r = bus_verify_polkit_async(bus, - &m->polkit_registry, - message, - "org.freedesktop.login1.flush-devices", - interactive, - error, - method_flush_devices, m); + r = bus_verify_polkit_async( + message, + CAP_SYS_ADMIN, + "org.freedesktop.login1.flush-devices", + interactive, + &m->polkit_registry, + error); if (r < 0) return r; if (r == 0) @@ -1300,9 +1388,11 @@ static int bus_manager_log_shutdown( q = NULL; } - return log_struct(LOG_NOTICE, MESSAGE_ID(SD_MESSAGE_SHUTDOWN), + return log_struct(LOG_NOTICE, + LOG_MESSAGE_ID(SD_MESSAGE_SHUTDOWN), p, - q, NULL); + q, + NULL); } static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) { @@ -1532,8 +1622,7 @@ static int method_do_shutdown_or_sleep( blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL); if (multiple_sessions) { - r = bus_verify_polkit_async(m->bus, &m->polkit_registry, message, - action_multiple_sessions, interactive, error, method, m); + r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, interactive, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) @@ -1541,8 +1630,7 @@ static int method_do_shutdown_or_sleep( } if (blocked) { - r = bus_verify_polkit_async(m->bus, &m->polkit_registry, message, - action_ignore_inhibit, interactive, error, method, m); + r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, interactive, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) @@ -1550,8 +1638,7 @@ static int method_do_shutdown_or_sleep( } if (!multiple_sessions && !blocked) { - r = bus_verify_polkit_async(m->bus, &m->polkit_registry, message, - action, interactive, error, method, m); + r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, interactive, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) @@ -1688,7 +1775,7 @@ static int method_can_shutdown_or_sleep( blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL); if (multiple_sessions) { - r = bus_verify_polkit(m->bus, message, action_multiple_sessions, false, &challenge, error); + r = bus_verify_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, false, &challenge, error); if (r < 0) return r; @@ -1701,7 +1788,7 @@ static int method_can_shutdown_or_sleep( } if (blocked) { - r = bus_verify_polkit(m->bus, message, action_ignore_inhibit, false, &challenge, error); + r = bus_verify_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, false, &challenge, error); if (r < 0) return r; @@ -1717,7 +1804,7 @@ static int method_can_shutdown_or_sleep( /* If neither inhibit nor multiple sessions * apply then just check the normal policy */ - r = bus_verify_polkit(m->bus, message, action, false, &challenge, error); + r = bus_verify_polkit(message, CAP_SYS_BOOT, action, false, &challenge, error); if (r < 0) return r; @@ -1837,7 +1924,7 @@ static int method_inhibit(sd_bus *bus, sd_bus_message *message, void *userdata, if (m->action_what & w) return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running"); - r = bus_verify_polkit_async(bus, &m->polkit_registry, message, + r = bus_verify_polkit_async(message, CAP_SYS_BOOT, w == INHIBIT_SHUTDOWN ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") : w == INHIBIT_SLEEP ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep" : "org.freedesktop.login1.inhibit-delay-sleep") : w == INHIBIT_IDLE ? "org.freedesktop.login1.inhibit-block-idle" : @@ -1845,7 +1932,7 @@ static int method_inhibit(sd_bus *bus, sd_bus_message *message, void *userdata, w == INHIBIT_HANDLE_SUSPEND_KEY ? "org.freedesktop.login1.inhibit-handle-suspend-key" : w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" : "org.freedesktop.login1.inhibit-handle-lid-switch", - false, error, method_inhibit, m); + false, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) @@ -1922,6 +2009,7 @@ const sd_bus_vtable manager_vtable[] = { SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0), @@ -2111,9 +2199,10 @@ int match_properties_changed(sd_bus *bus, sd_bus_message *message, void *userdat return 0; r = unit_name_from_dbus_path(path, &unit); + if (r == -EINVAL) /* not a unit */ + return 0; if (r < 0) - /* quietly ignore non-units paths */ - return r == -EINVAL ? 0 : r; + return r; session = hashmap_get(m->session_units, unit); if (session) @@ -2220,9 +2309,9 @@ int manager_dispatch_delayed(Manager *manager) { if (manager->action_timestamp + manager->inhibit_delay_max > now(CLOCK_MONOTONIC)) return 0; - log_info("Delay lock is active (UID %lu/%s, PID %lu/%s) but inhibitor timeout is reached.", - (unsigned long) offending->uid, strna(u), - (unsigned long) offending->pid, strna(comm)); + log_info("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.", + offending->uid, strna(u), + offending->pid, strna(comm)); } /* Actually do the operation */