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authorLennart Poettering <lennart@poettering.net>2011-12-31 03:16:08 +0100
committerLennart Poettering <lennart@poettering.net>2011-12-31 03:16:08 +0100
commit4bba9156da3e1df2cee24d10d7cd88c776ef4179 (patch)
treed149a225807351578df3b1567fab3585b4439677 /src/login/logind-session.c
parentfc5e60ee0c64343d1bd08c343275fc1ceff445aa (diff)
logind: move logind into its own subdirectory
Diffstat (limited to 'src/login/logind-session.c')
-rw-r--r--src/login/logind-session.c945
1 files changed, 945 insertions, 0 deletions
diff --git a/src/login/logind-session.c b/src/login/logind-session.c
new file mode 100644
index 0000000000..63ee75808b
--- /dev/null
+++ b/src/login/logind-session.c
@@ -0,0 +1,945 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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 General Public License as published by
+ the Free Software Foundation; either version 2 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/epoll.h>
+#include <fcntl.h>
+
+#include "logind-session.h"
+#include "strv.h"
+#include "util.h"
+#include "cgroup-util.h"
+
+#define IDLE_THRESHOLD_USEC (5*USEC_PER_MINUTE)
+
+Session* session_new(Manager *m, User *u, const char *id) {
+ Session *s;
+
+ assert(m);
+ assert(id);
+
+ s = new0(Session, 1);
+ if (!s)
+ return NULL;
+
+ s->state_file = strappend("/run/systemd/sessions/", id);
+ if (!s->state_file) {
+ free(s);
+ return NULL;
+ }
+
+ s->id = file_name_from_path(s->state_file);
+
+ if (hashmap_put(m->sessions, s->id, s) < 0) {
+ free(s->id);
+ free(s);
+ return NULL;
+ }
+
+ s->manager = m;
+ s->fifo_fd = -1;
+ s->user = u;
+
+ LIST_PREPEND(Session, sessions_by_user, u->sessions, s);
+
+ return s;
+}
+
+void session_free(Session *s) {
+ assert(s);
+
+ if (s->in_gc_queue)
+ LIST_REMOVE(Session, gc_queue, s->manager->session_gc_queue, s);
+
+ if (s->user) {
+ LIST_REMOVE(Session, sessions_by_user, s->user->sessions, s);
+
+ if (s->user->display == s)
+ s->user->display = NULL;
+ }
+
+ if (s->seat) {
+ if (s->seat->active == s)
+ s->seat->active = NULL;
+
+ LIST_REMOVE(Session, sessions_by_seat, s->seat->sessions, s);
+ }
+
+ if (s->cgroup_path)
+ hashmap_remove(s->manager->cgroups, s->cgroup_path);
+
+ free(s->cgroup_path);
+ strv_free(s->controllers);
+
+ free(s->tty);
+ free(s->display);
+ free(s->remote_host);
+ free(s->remote_user);
+ free(s->service);
+
+ hashmap_remove(s->manager->sessions, s->id);
+
+ session_remove_fifo(s);
+
+ free(s->state_file);
+ free(s);
+}
+
+int session_save(Session *s) {
+ FILE *f;
+ int r = 0;
+ char *temp_path;
+
+ assert(s);
+
+ if (!s->started)
+ return 0;
+
+ r = safe_mkdir("/run/systemd/sessions", 0755, 0, 0);
+ if (r < 0)
+ goto finish;
+
+ r = fopen_temporary(s->state_file, &f, &temp_path);
+ if (r < 0)
+ goto finish;
+
+ assert(s->user);
+
+ fchmod(fileno(f), 0644);
+
+ fprintf(f,
+ "# This is private data. Do not parse.\n"
+ "UID=%lu\n"
+ "USER=%s\n"
+ "ACTIVE=%i\n"
+ "REMOTE=%i\n"
+ "KILL_PROCESSES=%i\n",
+ (unsigned long) s->user->uid,
+ s->user->name,
+ session_is_active(s),
+ s->remote,
+ s->kill_processes);
+
+ if (s->type >= 0)
+ fprintf(f,
+ "TYPE=%s\n",
+ session_type_to_string(s->type));
+
+ if (s->cgroup_path)
+ fprintf(f,
+ "CGROUP=%s\n",
+ s->cgroup_path);
+
+ if (s->fifo_path)
+ fprintf(f,
+ "FIFO=%s\n",
+ s->fifo_path);
+
+ if (s->seat)
+ fprintf(f,
+ "SEAT=%s\n",
+ s->seat->id);
+
+ if (s->tty)
+ fprintf(f,
+ "TTY=%s\n",
+ s->tty);
+
+ if (s->display)
+ fprintf(f,
+ "DISPLAY=%s\n",
+ s->display);
+
+ if (s->remote_host)
+ fprintf(f,
+ "REMOTE_HOST=%s\n",
+ s->remote_host);
+
+ if (s->remote_user)
+ fprintf(f,
+ "REMOTE_USER=%s\n",
+ s->remote_user);
+
+ if (s->service)
+ fprintf(f,
+ "SERVICE=%s\n",
+ s->service);
+
+ if (s->seat && seat_is_vtconsole(s->seat))
+ fprintf(f,
+ "VTNR=%i\n",
+ s->vtnr);
+
+ if (s->leader > 0)
+ fprintf(f,
+ "LEADER=%lu\n",
+ (unsigned long) s->leader);
+
+ if (s->audit_id > 0)
+ fprintf(f,
+ "AUDIT=%llu\n",
+ (unsigned long long) s->audit_id);
+
+ fflush(f);
+
+ if (ferror(f) || rename(temp_path, s->state_file) < 0) {
+ r = -errno;
+ unlink(s->state_file);
+ unlink(temp_path);
+ }
+
+ fclose(f);
+ free(temp_path);
+
+finish:
+ if (r < 0)
+ log_error("Failed to save session data for %s: %s", s->id, strerror(-r));
+
+ return r;
+}
+
+int session_load(Session *s) {
+ char *remote = NULL,
+ *kill_processes = NULL,
+ *seat = NULL,
+ *vtnr = NULL,
+ *leader = NULL,
+ *audit_id = NULL,
+ *type = NULL;
+
+ int k, r;
+
+ assert(s);
+
+ r = parse_env_file(s->state_file, NEWLINE,
+ "REMOTE", &remote,
+ "KILL_PROCESSES", &kill_processes,
+ "CGROUP", &s->cgroup_path,
+ "FIFO", &s->fifo_path,
+ "SEAT", &seat,
+ "TTY", &s->tty,
+ "DISPLAY", &s->display,
+ "REMOTE_HOST", &s->remote_host,
+ "REMOTE_USER", &s->remote_user,
+ "SERVICE", &s->service,
+ "VTNR", &vtnr,
+ "LEADER", &leader,
+ "TYPE", &type,
+ NULL);
+
+ if (r < 0)
+ goto finish;
+
+ if (remote) {
+ k = parse_boolean(remote);
+ if (k >= 0)
+ s->remote = k;
+ }
+
+ if (kill_processes) {
+ k = parse_boolean(kill_processes);
+ if (k >= 0)
+ s->kill_processes = k;
+ }
+
+ if (seat && !s->seat) {
+ Seat *o;
+
+ o = hashmap_get(s->manager->seats, seat);
+ if (o)
+ seat_attach_session(o, s);
+ }
+
+ if (vtnr && s->seat && seat_is_vtconsole(s->seat)) {
+ int v;
+
+ k = safe_atoi(vtnr, &v);
+ if (k >= 0 && v >= 1)
+ s->vtnr = v;
+ }
+
+ if (leader) {
+ pid_t pid;
+
+ k = parse_pid(leader, &pid);
+ if (k >= 0 && pid >= 1) {
+ s->leader = pid;
+
+ audit_session_from_pid(pid, &s->audit_id);
+ }
+ }
+
+ if (type) {
+ SessionType t;
+
+ t = session_type_from_string(type);
+ if (t >= 0)
+ s->type = t;
+ }
+
+ if (s->fifo_path) {
+ int fd;
+
+ /* If we open an unopened pipe for reading we will not
+ get an EOF. to trigger an EOF we hence open it for
+ reading, but close it right-away which then will
+ trigger the EOF. */
+
+ fd = session_create_fifo(s);
+ if (fd >= 0)
+ close_nointr_nofail(fd);
+ }
+
+
+finish:
+ free(remote);
+ free(kill_processes);
+ free(seat);
+ free(vtnr);
+ free(leader);
+ free(audit_id);
+
+ return r;
+}
+
+int session_activate(Session *s) {
+ int r;
+ Session *old_active;
+
+ assert(s);
+
+ if (s->vtnr < 0)
+ return -ENOTSUP;
+
+ if (!s->seat)
+ return -ENOTSUP;
+
+ if (s->seat->active == s)
+ return 0;
+
+ assert(seat_is_vtconsole(s->seat));
+
+ r = chvt(s->vtnr);
+ if (r < 0)
+ return r;
+
+ old_active = s->seat->active;
+ s->seat->active = s;
+
+ return seat_apply_acls(s->seat, old_active);
+}
+
+static int session_link_x11_socket(Session *s) {
+ char *t, *f, *c;
+ size_t k;
+
+ assert(s);
+ assert(s->user);
+ assert(s->user->runtime_path);
+
+ if (s->user->display)
+ return 0;
+
+ if (!s->display || !display_is_local(s->display))
+ return 0;
+
+ k = strspn(s->display+1, "0123456789");
+ f = new(char, sizeof("/tmp/.X11-unix/X") + k);
+ if (!f) {
+ log_error("Out of memory");
+ return -ENOMEM;
+ }
+
+ c = stpcpy(f, "/tmp/.X11-unix/X");
+ memcpy(c, s->display+1, k);
+ c[k] = 0;
+
+ if (access(f, F_OK) < 0) {
+ log_warning("Session %s has display %s with nonexisting socket %s.", s->id, s->display, f);
+ free(f);
+ return -ENOENT;
+ }
+
+ t = strappend(s->user->runtime_path, "/X11/display");
+ if (!t) {
+ log_error("Out of memory");
+ free(f);
+ return -ENOMEM;
+ }
+
+ mkdir_parents(t, 0755);
+
+ if (link(f, t) < 0) {
+ if (errno == EEXIST) {
+ unlink(t);
+
+ if (link(f, t) >= 0)
+ goto done;
+ }
+
+ if (symlink(f, t) < 0) {
+
+ if (errno == EEXIST) {
+ unlink(t);
+
+ if (symlink(f, t) >= 0)
+ goto done;
+ }
+
+ log_error("Failed to link %s to %s: %m", f, t);
+ free(f);
+ free(t);
+ return -errno;
+ }
+ }
+
+done:
+ log_info("Linked %s to %s.", f, t);
+ free(f);
+ free(t);
+
+ s->user->display = s;
+
+ return 0;
+}
+
+static int session_create_one_group(Session *s, const char *controller, const char *path) {
+ int r;
+
+ assert(s);
+ assert(controller);
+ assert(path);
+
+ if (s->leader > 0) {
+ r = cg_create_and_attach(controller, path, s->leader);
+ if (r < 0)
+ r = cg_create(controller, path);
+ } else
+ r = cg_create(controller, path);
+
+ if (r < 0)
+ return r;
+
+ r = cg_set_task_access(controller, path, 0644, s->user->uid, s->user->gid);
+ if (r >= 0)
+ r = cg_set_group_access(controller, path, 0755, s->user->uid, s->user->gid);
+
+ return r;
+}
+
+static int session_create_cgroup(Session *s) {
+ char **k;
+ char *p;
+ int r;
+
+ assert(s);
+ assert(s->user);
+ assert(s->user->cgroup_path);
+
+ if (!s->cgroup_path) {
+ if (asprintf(&p, "%s/%s", s->user->cgroup_path, s->id) < 0) {
+ log_error("Out of memory");
+ return -ENOMEM;
+ }
+ } else
+ p = s->cgroup_path;
+
+ r = session_create_one_group(s, SYSTEMD_CGROUP_CONTROLLER, p);
+ if (r < 0) {
+ log_error("Failed to create "SYSTEMD_CGROUP_CONTROLLER":%s: %s", p, strerror(-r));
+ free(p);
+ s->cgroup_path = NULL;
+ return r;
+ }
+
+ s->cgroup_path = p;
+
+ STRV_FOREACH(k, s->controllers) {
+
+ if (strv_contains(s->reset_controllers, *k))
+ continue;
+
+ r = session_create_one_group(s, *k, p);
+ if (r < 0)
+ log_warning("Failed to create %s:%s: %s", *k, p, strerror(-r));
+ }
+
+ STRV_FOREACH(k, s->manager->controllers) {
+
+ if (strv_contains(s->reset_controllers, *k) ||
+ strv_contains(s->manager->reset_controllers, *k) ||
+ strv_contains(s->controllers, *k))
+ continue;
+
+ r = session_create_one_group(s, *k, p);
+ if (r < 0)
+ log_warning("Failed to create %s:%s: %s", *k, p, strerror(-r));
+ }
+
+ if (s->leader > 0) {
+
+ STRV_FOREACH(k, s->reset_controllers) {
+ r = cg_attach(*k, "/", s->leader);
+ if (r < 0)
+ log_warning("Failed to reset controller %s: %s", *k, strerror(-r));
+
+ }
+
+ STRV_FOREACH(k, s->manager->reset_controllers) {
+
+ if (strv_contains(s->reset_controllers, *k) ||
+ strv_contains(s->controllers, *k))
+ continue;
+
+ r = cg_attach(*k, "/", s->leader);
+ if (r < 0)
+ log_warning("Failed to reset controller %s: %s", *k, strerror(-r));
+
+ }
+ }
+
+ hashmap_put(s->manager->cgroups, s->cgroup_path, s);
+
+ return 0;
+}
+
+int session_start(Session *s) {
+ int r;
+
+ assert(s);
+ assert(s->user);
+
+ if (s->started)
+ return 0;
+
+ r = user_start(s->user);
+ if (r < 0)
+ return r;
+
+ log_full(s->type == SESSION_TTY || s->type == SESSION_X11 ? LOG_INFO : LOG_DEBUG,
+ "New session %s of user %s.", s->id, s->user->name);
+
+ /* Create cgroup */
+ r = session_create_cgroup(s);
+ if (r < 0)
+ return r;
+
+ /* Create X11 symlink */
+ session_link_x11_socket(s);
+
+ dual_timestamp_get(&s->timestamp);
+
+ if (s->seat)
+ seat_read_active_vt(s->seat);
+
+ s->started = true;
+
+ /* Save session data */
+ session_save(s);
+ user_save(s->user);
+
+ session_send_signal(s, true);
+
+ if (s->seat) {
+ seat_save(s->seat);
+
+ if (s->seat->active == s)
+ seat_send_changed(s->seat, "Sessions\0ActiveSession\0");
+ else
+ seat_send_changed(s->seat, "Sessions\0");
+ }
+
+ user_send_changed(s->user, "Sessions\0");
+
+ return 0;
+}
+
+static bool session_shall_kill(Session *s) {
+ assert(s);
+
+ if (!s->kill_processes)
+ return false;
+
+ if (strv_contains(s->manager->kill_exclude_users, s->user->name))
+ return false;
+
+ if (strv_isempty(s->manager->kill_only_users))
+ return true;
+
+ return strv_contains(s->manager->kill_only_users, s->user->name);
+}
+
+static int session_terminate_cgroup(Session *s) {
+ int r;
+ char **k;
+
+ assert(s);
+
+ if (!s->cgroup_path)
+ return 0;
+
+ cg_trim(SYSTEMD_CGROUP_CONTROLLER, s->cgroup_path, false);
+
+ if (session_shall_kill(s)) {
+
+ r = cg_kill_recursive_and_wait(SYSTEMD_CGROUP_CONTROLLER, s->cgroup_path, true);
+ if (r < 0)
+ log_error("Failed to kill session cgroup: %s", strerror(-r));
+
+ } else {
+ r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, s->cgroup_path, true);
+ if (r < 0)
+ log_error("Failed to check session cgroup: %s", strerror(-r));
+ else if (r > 0) {
+ r = cg_delete(SYSTEMD_CGROUP_CONTROLLER, s->cgroup_path);
+ if (r < 0)
+ log_error("Failed to delete session cgroup: %s", strerror(-r));
+ } else
+ r = -EBUSY;
+ }
+
+ STRV_FOREACH(k, s->user->manager->controllers)
+ cg_trim(*k, s->cgroup_path, true);
+
+ hashmap_remove(s->manager->cgroups, s->cgroup_path);
+
+ free(s->cgroup_path);
+ s->cgroup_path = NULL;
+
+ return r;
+}
+
+static int session_unlink_x11_socket(Session *s) {
+ char *t;
+ int r;
+
+ assert(s);
+ assert(s->user);
+
+ if (s->user->display != s)
+ return 0;
+
+ s->user->display = NULL;
+
+ t = strappend(s->user->runtime_path, "/X11/display");
+ if (!t) {
+ log_error("Out of memory");
+ return -ENOMEM;
+ }
+
+ r = unlink(t);
+ free(t);
+
+ return r < 0 ? -errno : 0;
+}
+
+int session_stop(Session *s) {
+ int r = 0, k;
+
+ assert(s);
+
+ if (s->started)
+ log_full(s->type == SESSION_TTY || s->type == SESSION_X11 ? LOG_INFO : LOG_DEBUG,
+ "Removed session %s.", s->id);
+
+ /* Kill cgroup */
+ k = session_terminate_cgroup(s);
+ if (k < 0)
+ r = k;
+
+ /* Remove X11 symlink */
+ session_unlink_x11_socket(s);
+
+ unlink(s->state_file);
+ session_add_to_gc_queue(s);
+ user_add_to_gc_queue(s->user);
+
+ if (s->started)
+ session_send_signal(s, false);
+
+ if (s->seat) {
+ if (s->seat->active == s)
+ seat_set_active(s->seat, NULL);
+
+ seat_send_changed(s->seat, "Sessions\0");
+ }
+
+ user_send_changed(s->user, "Sessions\0");
+
+ s->started = false;
+
+ return r;
+}
+
+bool session_is_active(Session *s) {
+ assert(s);
+
+ if (!s->seat)
+ return true;
+
+ return s->seat->active == s;
+}
+
+int session_get_idle_hint(Session *s, dual_timestamp *t) {
+ char *p;
+ struct stat st;
+ usec_t u, n;
+ bool b;
+ int k;
+
+ assert(s);
+
+ if (s->idle_hint) {
+ if (t)
+ *t = s->idle_hint_timestamp;
+
+ return s->idle_hint;
+ }
+
+ if (isempty(s->tty))
+ goto dont_know;
+
+ if (s->tty[0] != '/') {
+ p = strappend("/dev/", s->tty);
+ if (!p)
+ return -ENOMEM;
+ } else
+ p = NULL;
+
+ if (!startswith(p ? p : s->tty, "/dev/")) {
+ free(p);
+ goto dont_know;
+ }
+
+ k = lstat(p ? p : s->tty, &st);
+ free(p);
+
+ if (k < 0)
+ goto dont_know;
+
+ u = timespec_load(&st.st_atim);
+ n = now(CLOCK_REALTIME);
+ b = u + IDLE_THRESHOLD_USEC < n;
+
+ if (t)
+ dual_timestamp_from_realtime(t, u + b ? IDLE_THRESHOLD_USEC : 0);
+
+ return b;
+
+dont_know:
+ if (t)
+ *t = s->idle_hint_timestamp;
+
+ return 0;
+}
+
+void session_set_idle_hint(Session *s, bool b) {
+ assert(s);
+
+ if (s->idle_hint == b)
+ return;
+
+ s->idle_hint = b;
+ dual_timestamp_get(&s->idle_hint_timestamp);
+
+ session_send_changed(s,
+ "IdleHint\0"
+ "IdleSinceHint\0"
+ "IdleSinceHintMonotonic\0");
+
+ if (s->seat)
+ seat_send_changed(s->seat,
+ "IdleHint\0"
+ "IdleSinceHint\0"
+ "IdleSinceHintMonotonic\0");
+
+ user_send_changed(s->user,
+ "IdleHint\0"
+ "IdleSinceHint\0"
+ "IdleSinceHintMonotonic\0");
+
+ manager_send_changed(s->manager,
+ "IdleHint\0"
+ "IdleSinceHint\0"
+ "IdleSinceHintMonotonic\0");
+}
+
+int session_create_fifo(Session *s) {
+ int r;
+
+ assert(s);
+
+ /* Create FIFO */
+ if (!s->fifo_path) {
+ r = safe_mkdir("/run/systemd/sessions", 0755, 0, 0);
+ if (r < 0)
+ return r;
+
+ if (asprintf(&s->fifo_path, "/run/systemd/sessions/%s.ref", s->id) < 0)
+ return -ENOMEM;
+
+ if (mkfifo(s->fifo_path, 0600) < 0 && errno != EEXIST)
+ return -errno;
+ }
+
+ /* Open reading side */
+ if (s->fifo_fd < 0) {
+ struct epoll_event ev;
+
+ s->fifo_fd = open(s->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY);
+ if (s->fifo_fd < 0)
+ return -errno;
+
+ r = hashmap_put(s->manager->fifo_fds, INT_TO_PTR(s->fifo_fd + 1), s);
+ if (r < 0)
+ return r;
+
+ zero(ev);
+ ev.events = 0;
+ ev.data.u32 = FD_FIFO_BASE + s->fifo_fd;
+
+ if (epoll_ctl(s->manager->epoll_fd, EPOLL_CTL_ADD, s->fifo_fd, &ev) < 0)
+ return -errno;
+ }
+
+ /* Open writing side */
+ r = open(s->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY);
+ if (r < 0)
+ return -errno;
+
+ return r;
+}
+
+void session_remove_fifo(Session *s) {
+ assert(s);
+
+ if (s->fifo_fd >= 0) {
+ assert_se(hashmap_remove(s->manager->fifo_fds, INT_TO_PTR(s->fifo_fd + 1)) == s);
+ assert_se(epoll_ctl(s->manager->epoll_fd, EPOLL_CTL_DEL, s->fifo_fd, NULL) == 0);
+ close_nointr_nofail(s->fifo_fd);
+ s->fifo_fd = -1;
+ }
+
+ if (s->fifo_path) {
+ unlink(s->fifo_path);
+ free(s->fifo_path);
+ s->fifo_path = NULL;
+ }
+}
+
+int session_check_gc(Session *s, bool drop_not_started) {
+ int r;
+
+ assert(s);
+
+ if (drop_not_started && !s->started)
+ return 0;
+
+ if (s->fifo_fd >= 0) {
+
+ r = pipe_eof(s->fifo_fd);
+ if (r < 0)
+ return r;
+
+ if (r == 0)
+ return 1;
+ }
+
+ if (s->cgroup_path) {
+
+ r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, s->cgroup_path, false);
+ if (r < 0)
+ return r;
+
+ if (r <= 0)
+ return 1;
+ }
+
+ return 0;
+}
+
+void session_add_to_gc_queue(Session *s) {
+ assert(s);
+
+ if (s->in_gc_queue)
+ return;
+
+ LIST_PREPEND(Session, gc_queue, s->manager->session_gc_queue, s);
+ s->in_gc_queue = true;
+}
+
+int session_kill(Session *s, KillWho who, int signo) {
+ int r = 0;
+ Set *pid_set = NULL;
+
+ assert(s);
+
+ if (!s->cgroup_path)
+ return -ESRCH;
+
+ if (s->leader <= 0 && who == KILL_LEADER)
+ return -ESRCH;
+
+ if (s->leader > 0)
+ if (kill(s->leader, signo) < 0)
+ r = -errno;
+
+ if (who == KILL_ALL) {
+ int q;
+
+ pid_set = set_new(trivial_hash_func, trivial_compare_func);
+ if (!pid_set)
+ return -ENOMEM;
+
+ if (s->leader > 0) {
+ q = set_put(pid_set, LONG_TO_PTR(s->leader));
+ if (q < 0)
+ r = q;
+ }
+
+ q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, s->cgroup_path, signo, false, true, false, pid_set);
+ if (q < 0)
+ if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
+ r = q;
+ }
+
+ if (pid_set)
+ set_free(pid_set);
+
+ return r;
+}
+
+static const char* const session_type_table[_SESSION_TYPE_MAX] = {
+ [SESSION_TTY] = "tty",
+ [SESSION_X11] = "x11",
+ [SESSION_UNSPECIFIED] = "unspecified"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(session_type, SessionType);
+
+static const char* const kill_who_table[_KILL_WHO_MAX] = {
+ [KILL_LEADER] = "leader",
+ [KILL_ALL] = "all"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho);