diff options
Diffstat (limited to 'src/grp-login/systemd-logind/logind-user-dbus.c')
-rw-r--r-- | src/grp-login/systemd-logind/logind-user-dbus.c | 399 |
1 files changed, 399 insertions, 0 deletions
diff --git a/src/grp-login/systemd-logind/logind-user-dbus.c b/src/grp-login/systemd-logind/logind-user-dbus.c new file mode 100644 index 0000000000..a4eadc65fa --- /dev/null +++ b/src/grp-login/systemd-logind/logind-user-dbus.c @@ -0,0 +1,399 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <string.h> + +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/signal-util.h" +#include "systemd-basic/strv.h" +#include "systemd-basic/user-util.h" +#include "systemd-shared/bus-util.h" + +#include "logind-user.h" +#include "logind.h" + +static int property_get_display( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + _cleanup_free_ char *p = NULL; + User *u = userdata; + + assert(bus); + assert(reply); + assert(u); + + p = u->display ? session_bus_path(u->display) : strdup("/"); + if (!p) + return -ENOMEM; + + return sd_bus_message_append(reply, "(so)", u->display ? u->display->id : "", p); +} + +static int property_get_state( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + User *u = userdata; + + assert(bus); + assert(reply); + assert(u); + + return sd_bus_message_append(reply, "s", user_state_to_string(user_get_state(u))); +} + +static int property_get_sessions( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + User *u = userdata; + Session *session; + int r; + + assert(bus); + assert(reply); + assert(u); + + r = sd_bus_message_open_container(reply, 'a', "(so)"); + if (r < 0) + return r; + + LIST_FOREACH(sessions_by_user, session, u->sessions) { + _cleanup_free_ char *p = NULL; + + p = session_bus_path(session); + if (!p) + return -ENOMEM; + + r = sd_bus_message_append(reply, "(so)", session->id, p); + if (r < 0) + return r; + + } + + return sd_bus_message_close_container(reply); +} + +static int property_get_idle_hint( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + User *u = userdata; + + assert(bus); + assert(reply); + assert(u); + + return sd_bus_message_append(reply, "b", user_get_idle_hint(u, NULL) > 0); +} + +static int property_get_idle_since_hint( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + User *u = userdata; + dual_timestamp t = DUAL_TIMESTAMP_NULL; + uint64_t k; + + assert(bus); + assert(reply); + assert(u); + + user_get_idle_hint(u, &t); + k = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic; + + return sd_bus_message_append(reply, "t", k); +} + +static int property_get_linger( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + User *u = userdata; + int r; + + assert(bus); + assert(reply); + assert(u); + + r = user_check_linger_file(u); + + return sd_bus_message_append(reply, "b", r > 0); +} + +int bus_user_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error) { + User *u = userdata; + int r; + + assert(message); + assert(u); + + r = bus_verify_polkit_async( + message, + CAP_KILL, + "org.freedesktop.login1.manage", + NULL, + false, + u->uid, + &u->manager->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Will call us back */ + + r = user_stop(u, true); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_user_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) { + User *u = userdata; + int32_t signo; + int r; + + assert(message); + assert(u); + + r = bus_verify_polkit_async( + message, + CAP_KILL, + "org.freedesktop.login1.manage", + NULL, + false, + u->uid, + &u->manager->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Will call us back */ + + r = sd_bus_message_read(message, "i", &signo); + if (r < 0) + return r; + + if (!SIGNAL_VALID(signo)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo); + + r = user_kill(u, signo); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +const sd_bus_vtable user_vtable[] = { + SD_BUS_VTABLE_START(0), + + SD_BUS_PROPERTY("UID", "u", bus_property_get_uid, offsetof(User, uid), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("GID", "u", bus_property_get_gid, offsetof(User, gid), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Name", "s", NULL, offsetof(User, name), SD_BUS_VTABLE_PROPERTY_CONST), + BUS_PROPERTY_DUAL_TIMESTAMP("Timestamp", offsetof(User, timestamp), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("RuntimePath", "s", NULL, offsetof(User, runtime_path), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Service", "s", NULL, offsetof(User, service), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Slice", "s", NULL, offsetof(User, slice), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Display", "(so)", property_get_display, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("State", "s", property_get_state, 0, 0), + SD_BUS_PROPERTY("Sessions", "a(so)", property_get_sessions, 0, 0), + SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("Linger", "b", property_get_linger, 0, 0), + + SD_BUS_METHOD("Terminate", NULL, NULL, bus_user_method_terminate, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Kill", "i", NULL, bus_user_method_kill, SD_BUS_VTABLE_UNPRIVILEGED), + + SD_BUS_VTABLE_END +}; + +int user_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { + Manager *m = userdata; + uid_t uid; + User *user; + int r; + + assert(bus); + assert(path); + assert(interface); + assert(found); + assert(m); + + if (streq(path, "/org/freedesktop/login1/user/self")) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + sd_bus_message *message; + + message = sd_bus_get_current_message(bus); + if (!message) + return 0; + + 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); + } else { + const char *p; + + p = startswith(path, "/org/freedesktop/login1/user/_"); + if (!p) + return 0; + + r = parse_uid(p, &uid); + } + if (r < 0) + return 0; + + user = hashmap_get(m->users, UID_TO_PTR(uid)); + if (!user) + return 0; + + *found = user; + return 1; +} + +char *user_bus_path(User *u) { + char *s; + + assert(u); + + if (asprintf(&s, "/org/freedesktop/login1/user/_"UID_FMT, u->uid) < 0) + return NULL; + + return s; +} + +int user_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { + _cleanup_strv_free_ char **l = NULL; + sd_bus_message *message; + Manager *m = userdata; + User *user; + Iterator i; + int r; + + assert(bus); + assert(path); + assert(nodes); + + HASHMAP_FOREACH(user, m->users, i) { + char *p; + + p = user_bus_path(user); + if (!p) + return -ENOMEM; + + r = strv_consume(&l, p); + if (r < 0) + return r; + } + + message = sd_bus_get_current_message(bus); + if (message) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + uid_t uid; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds); + if (r >= 0) { + r = sd_bus_creds_get_owner_uid(creds, &uid); + if (r >= 0) { + user = hashmap_get(m->users, UID_TO_PTR(uid)); + if (user) { + r = strv_extend(&l, "/org/freedesktop/login1/user/self"); + if (r < 0) + return r; + } + } + } + } + + *nodes = l; + l = NULL; + + return 1; +} + +int user_send_signal(User *u, bool new_user) { + _cleanup_free_ char *p = NULL; + + assert(u); + + p = user_bus_path(u); + if (!p) + return -ENOMEM; + + return sd_bus_emit_signal( + u->manager->bus, + "/org/freedesktop/login1", + "org.freedesktop.login1.Manager", + new_user ? "UserNew" : "UserRemoved", + "uo", (uint32_t) u->uid, p); +} + +int user_send_changed(User *u, const char *properties, ...) { + _cleanup_free_ char *p = NULL; + char **l; + + assert(u); + + if (!u->started) + return 0; + + p = user_bus_path(u); + if (!p) + return -ENOMEM; + + l = strv_from_stdarg_alloca(properties); + + return sd_bus_emit_properties_changed_strv(u->manager->bus, p, "org.freedesktop.login1.User", l); +} |