along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include <sys/mount.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
-#include "logind-user.h"
#include "util.h"
#include "mkdir.h"
-#include "cgroup-util.h"
+#include "rm-rf.h"
#include "hashmap.h"
-#include "strv.h"
#include "fileio.h"
+#include "path-util.h"
+#include "special.h"
+#include "unit-name.h"
+#include "bus-util.h"
+#include "bus-error.h"
+#include "conf-parser.h"
+#include "clean-ipc.h"
+#include "logind-user.h"
+#include "smack-util.h"
+#include "formats-util.h"
User* user_new(Manager *m, uid_t uid, gid_t gid, const char *name) {
User *u;
return NULL;
u->name = strdup(name);
- if (!u->name) {
- free(u);
- return NULL;
- }
+ if (!u->name)
+ goto fail;
- if (asprintf(&u->state_file, "/run/systemd/users/%lu", (unsigned long) uid) < 0) {
- free(u->name);
- free(u);
- return NULL;
- }
+ if (asprintf(&u->state_file, "/run/systemd/users/"UID_FMT, uid) < 0)
+ goto fail;
- if (hashmap_put(m->users, ULONG_TO_PTR((unsigned long) uid), u) < 0) {
- free(u->state_file);
- free(u->name);
- free(u);
- return NULL;
- }
+ if (hashmap_put(m->users, UID_TO_PTR(uid), u) < 0)
+ goto fail;
u->manager = m;
u->uid = uid;
u->gid = gid;
return u;
+
+fail:
+ free(u->state_file);
+ free(u->name);
+ free(u);
+
+ return NULL;
}
void user_free(User *u) {
assert(u);
if (u->in_gc_queue)
- LIST_REMOVE(User, gc_queue, u->manager->user_gc_queue, u);
+ LIST_REMOVE(gc_queue, u->manager->user_gc_queue, u);
while (u->sessions)
session_free(u->sessions);
- if (u->cgroup_path)
- hashmap_remove(u->manager->user_cgroups, u->cgroup_path);
- free(u->cgroup_path);
-
- free(u->service);
free(u->runtime_path);
- hashmap_remove(u->manager->users, ULONG_TO_PTR((unsigned long) u->uid));
+ hashmap_remove(u->manager->users, UID_TO_PTR(u->uid));
free(u->name);
free(u->state_file);
}
int user_save(User *u) {
- FILE *f;
+ _cleanup_free_ char *temp_path = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
int r;
- char *temp_path;
assert(u);
assert(u->state_file);
u->name,
user_state_to_string(user_get_state(u)));
- if (u->cgroup_path)
- fprintf(f,
- "CGROUP=%s\n",
- u->cgroup_path);
-
if (u->runtime_path)
- fprintf(f,
- "RUNTIME=%s\n",
- u->runtime_path);
-
- if (u->service)
- fprintf(f,
- "SERVICE=%s\n",
- u->service);
+ fprintf(f, "RUNTIME=%s\n", u->runtime_path);
if (u->display)
+ fprintf(f, "DISPLAY=%s\n", u->display->id);
+
+ if (dual_timestamp_is_set(&u->timestamp))
fprintf(f,
- "DISPLAY=%s\n",
- u->display->id);
+ "REALTIME="USEC_FMT"\n"
+ "MONOTONIC="USEC_FMT"\n",
+ u->timestamp.realtime,
+ u->timestamp.monotonic);
if (u->sessions) {
Session *i;
unlink(temp_path);
}
- fclose(f);
- free(temp_path);
-
finish:
if (r < 0)
- log_error("Failed to save user data for %s: %s", u->name, strerror(-r));
+ log_error_errno(r, "Failed to save user data %s: %m", u->state_file);
return r;
}
int user_load(User *u) {
- int r;
- char *display = NULL;
+ _cleanup_free_ char *display = NULL, *realtime = NULL, *monotonic = NULL;
Session *s = NULL;
+ int r;
assert(u);
r = parse_env_file(u->state_file, NEWLINE,
- "CGROUP", &u->cgroup_path,
- "RUNTIME", &u->runtime_path,
- "SERVICE", &u->service,
- "DISPLAY", &display,
+ "RUNTIME", &u->runtime_path,
+ "DISPLAY", &display,
+ "REALTIME", &realtime,
+ "MONOTONIC", &monotonic,
NULL);
if (r < 0) {
- free(display);
-
if (r == -ENOENT)
return 0;
- log_error("Failed to read %s: %s", u->state_file, strerror(-r));
+ log_error_errno(r, "Failed to read %s: %m", u->state_file);
return r;
}
- if (display) {
+ if (display)
s = hashmap_get(u->manager->sessions, display);
- free(display);
- }
if (s && s->display && display_is_local(s->display))
u->display = s;
+ if (realtime) {
+ unsigned long long l;
+ if (sscanf(realtime, "%llu", &l) > 0)
+ u->timestamp.realtime = l;
+ }
+
+ if (monotonic) {
+ unsigned long long l;
+ if (sscanf(monotonic, "%llu", &l) > 0)
+ u->timestamp.monotonic = l;
+ }
+
return r;
}
assert(u);
r = mkdir_safe_label("/run/user", 0755, 0, 0);
- if (r < 0) {
- log_error("Failed to create /run/user: %s", strerror(-r));
- return r;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to create /run/user: %m");
if (!u->runtime_path) {
- if (asprintf(&p, "/run/user/%lu", (unsigned long) u->uid) < 0)
+ if (asprintf(&p, "/run/user/" UID_FMT, u->uid) < 0)
return log_oom();
} else
p = u->runtime_path;
- r = mkdir_safe_label(p, 0700, u->uid, u->gid);
- if (r < 0) {
- log_error("Failed to create runtime directory %s: %s", p, strerror(-r));
- free(p);
- u->runtime_path = NULL;
- return r;
- }
-
- u->runtime_path = p;
- return 0;
-}
-
-static int user_create_cgroup(User *u) {
- char **k;
- char *p;
- int r;
-
- assert(u);
-
- if (!u->cgroup_path) {
- _cleanup_free_ char *name = NULL, *escaped = NULL;
-
- if (asprintf(&name, "%lu.user", (unsigned long) u->uid) < 0)
- return log_oom();
-
- escaped = cg_escape(name);
- if (!escaped)
- return log_oom();
-
- p = strjoin(u->manager->cgroup_path, "/", escaped, NULL);
- if (!p)
- return log_oom();
- } else
- p = u->cgroup_path;
+ if (path_is_mount_point(p, false) <= 0) {
+ _cleanup_free_ char *t = NULL;
- r = cg_create(SYSTEMD_CGROUP_CONTROLLER, p, NULL);
- if (r < 0) {
- log_error("Failed to create cgroup "SYSTEMD_CGROUP_CONTROLLER":%s: %s", p, strerror(-r));
- free(p);
- u->cgroup_path = NULL;
- return r;
- }
+ (void) mkdir(p, 0700);
- u->cgroup_path = p;
+ if (mac_smack_use())
+ r = asprintf(&t, "mode=0700,smackfsroot=*,uid=" UID_FMT ",gid=" GID_FMT ",size=%zu", u->uid, u->gid, u->manager->runtime_dir_size);
+ else
+ r = asprintf(&t, "mode=0700,uid=" UID_FMT ",gid=" GID_FMT ",size=%zu", u->uid, u->gid, u->manager->runtime_dir_size);
+ if (r < 0) {
+ r = log_oom();
+ goto fail;
+ }
- STRV_FOREACH(k, u->manager->controllers) {
+ r = mount("tmpfs", p, "tmpfs", MS_NODEV|MS_NOSUID, t);
+ if (r < 0) {
+ if (errno != EPERM) {
+ r = log_error_errno(errno, "Failed to mount per-user tmpfs directory %s: %m", p);
+ goto fail;
+ }
- if (strv_contains(u->manager->reset_controllers, *k))
- continue;
+ /* Lacking permissions, maybe
+ * CAP_SYS_ADMIN-less container? In this case,
+ * just use a normal directory. */
- r = cg_create(*k, p, NULL);
- if (r < 0)
- log_warning("Failed to create cgroup %s:%s: %s", *k, p, strerror(-r));
+ r = chmod_and_chown(p, 0700, u->uid, u->gid);
+ if (r < 0) {
+ log_error_errno(r, "Failed to change runtime directory ownership and mode: %m");
+ goto fail;
+ }
+ }
}
- r = hashmap_put(u->manager->user_cgroups, u->cgroup_path, u);
- if (r < 0)
- log_warning("Failed to create mapping between cgroup and user");
-
+ u->runtime_path = p;
return 0;
-}
-static int user_start_service(User *u) {
- assert(u);
-
- /* FIXME: Fill me in later ... */
+fail:
+ if (p) {
+ /* Try to clean up, but ignore errors */
+ (void) rmdir(p);
+ free(p);
+ }
- return 0;
+ u->runtime_path = NULL;
+ return r;
}
int user_start(User *u) {
if (r < 0)
return r;
- /* Create cgroup */
- r = user_create_cgroup(u);
- if (r < 0)
- return r;
-
- /* Spawn user systemd */
- r = user_start_service(u);
- if (r < 0)
- return r;
-
- dual_timestamp_get(&u->timestamp);
+ if (!dual_timestamp_is_set(&u->timestamp))
+ dual_timestamp_get(&u->timestamp);
u->started = true;
return 0;
}
-static int user_stop_service(User *u) {
- assert(u);
-
- if (!u->service)
- return 0;
-
- return 0;
-}
-
-static int user_shall_kill(User *u) {
- assert(u);
-
- if (!u->manager->kill_user_processes)
- return false;
-
- if (strv_contains(u->manager->kill_exclude_users, u->name))
- return false;
-
- if (strv_isempty(u->manager->kill_only_users))
- return true;
-
- return strv_contains(u->manager->kill_only_users, u->name);
-}
-
-static int user_terminate_cgroup(User *u) {
+static int user_remove_runtime_path(User *u) {
int r;
- char **k;
assert(u);
- if (!u->cgroup_path)
+ if (!u->runtime_path)
return 0;
- cg_trim(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, false);
-
- if (user_shall_kill(u)) {
-
- r = cg_kill_recursive_and_wait(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, true);
- if (r < 0)
- log_error("Failed to kill user cgroup: %s", strerror(-r));
- } else {
-
- r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, true);
- if (r < 0)
- log_error("Failed to check user cgroup: %s", strerror(-r));
- else if (r > 0) {
- r = cg_delete(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path);
- if (r < 0)
- log_error("Failed to delete user cgroup: %s", strerror(-r));
- } else
- r = -EBUSY;
- }
+ r = rm_rf(u->runtime_path, 0);
+ if (r < 0)
+ log_error_errno(r, "Failed to remove runtime directory %s: %m", u->runtime_path);
- STRV_FOREACH(k, u->manager->controllers)
- cg_trim(*k, u->cgroup_path, true);
+ /* Ignore cases where the directory isn't mounted, as that's
+ * quite possible, if we lacked the permissions to mount
+ * something */
+ r = umount2(u->runtime_path, MNT_DETACH);
+ if (r < 0 && errno != EINVAL && errno != ENOENT)
+ log_error_errno(errno, "Failed to unmount user runtime directory %s: %m", u->runtime_path);
- hashmap_remove(u->manager->user_cgroups, u->cgroup_path);
+ r = rm_rf(u->runtime_path, REMOVE_ROOT);
+ if (r < 0)
+ log_error_errno(r, "Failed to remove runtime directory %s: %m", u->runtime_path);
- free(u->cgroup_path);
- u->cgroup_path = NULL;
+ free(u->runtime_path);
+ u->runtime_path = NULL;
return r;
}
-static int user_remove_runtime_path(User *u) {
- int r;
-
+int user_stop(User *u, bool force) {
+ Session *s;
+ int r = 0, k;
assert(u);
- if (!u->runtime_path)
- return 0;
+ /* Stop jobs have already been queued */
+ if (u->stopping) {
+ user_save(u);
+ return r;
+ }
- r = rm_rf(u->runtime_path, false, true, false);
- if (r < 0)
- log_error("Failed to remove runtime directory %s: %s", u->runtime_path, strerror(-r));
+ LIST_FOREACH(sessions_by_user, s, u->sessions) {
+ k = session_stop(s, force);
+ if (k < 0)
+ r = k;
+ }
- free(u->runtime_path);
- u->runtime_path = NULL;
+ u->stopping = true;
+
+ user_save(u);
return r;
}
-int user_stop(User *u) {
+int user_finalize(User *u) {
Session *s;
int r = 0, k;
+
assert(u);
if (u->started)
log_debug("User %s logged out.", u->name);
LIST_FOREACH(sessions_by_user, s, u->sessions) {
- k = session_stop(s);
+ k = session_finalize(s);
if (k < 0)
r = k;
}
- /* Kill systemd */
- k = user_stop_service(u);
- if (k < 0)
- r = k;
-
- /* Kill cgroup */
- k = user_terminate_cgroup(u);
- if (k < 0)
- r = k;
-
/* Kill XDG_RUNTIME_DIR */
k = user_remove_runtime_path(u);
if (k < 0)
r = k;
+ /* Clean SysV + POSIX IPC objects */
+ if (u->manager->remove_ipc) {
+ k = clean_ipc(u->uid);
+ if (k < 0)
+ r = k;
+ }
+
unlink(u->state_file);
user_add_to_gc_queue(u);
- if (u->started)
+ if (u->started) {
user_send_signal(u, false);
-
- u->started = false;
+ u->started = false;
+ }
return r;
}
return idle_hint;
}
-static int user_check_linger_file(User *u) {
- char *p;
- int r;
+int user_check_linger_file(User *u) {
+ _cleanup_free_ char *cc = NULL;
+ char *p = NULL;
- if (asprintf(&p, "/var/lib/systemd/linger/%s", u->name) < 0)
+ cc = cescape(u->name);
+ if (!cc)
return -ENOMEM;
- r = access(p, F_OK) >= 0;
- free(p);
+ p = strjoina("/var/lib/systemd/linger/", cc);
- return r;
+ return access(p, F_OK) >= 0;
}
-int user_check_gc(User *u, bool drop_not_started) {
- int r;
-
+bool user_check_gc(User *u, bool drop_not_started) {
assert(u);
if (drop_not_started && !u->started)
- return 0;
+ return false;
if (u->sessions)
- return 1;
+ return true;
if (user_check_linger_file(u) > 0)
- return 1;
-
- if (u->cgroup_path) {
- r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, false);
- if (r < 0)
- return r;
-
- if (r <= 0)
- return 1;
- }
+ return true;
- return 0;
+ return false;
}
void user_add_to_gc_queue(User *u) {
if (u->in_gc_queue)
return;
- LIST_PREPEND(User, gc_queue, u->manager->user_gc_queue, u);
+ LIST_PREPEND(gc_queue, u->manager->user_gc_queue, u);
u->in_gc_queue = true;
}
UserState user_get_state(User *u) {
Session *i;
- bool all_closing = true;
assert(u);
+ if (u->stopping)
+ return USER_CLOSING;
- LIST_FOREACH(sessions_by_user, i, u->sessions) {
- if (session_is_active(i))
- return USER_ACTIVE;
- if (session_get_state(i) != SESSION_CLOSING)
- all_closing = false;
- }
+ if (u->sessions) {
+ bool all_closing = true;
+
+ LIST_FOREACH(sessions_by_user, i, u->sessions) {
+ SessionState state;
+
+ state = session_get_state(i);
+ if (state == SESSION_ACTIVE)
+ return USER_ACTIVE;
+ if (state != SESSION_CLOSING)
+ all_closing = false;
+ }
- if (u->sessions)
return all_closing ? USER_CLOSING : USER_ONLINE;
+ }
if (user_check_linger_file(u) > 0)
return USER_LINGERING;
}
int user_kill(User *u, int signo) {
- int r = 0, q;
- Set *pid_set = NULL;
+ Session *s;
+ int res = 0;
assert(u);
- if (!u->cgroup_path)
- return -ESRCH;
+ LIST_FOREACH(sessions_by_user, s, u->sessions) {
+ int r = session_kill(s, KILL_ALL, signo);
+ if (res == 0 && r < 0)
+ res = r;
+ }
- pid_set = set_new(trivial_hash_func, trivial_compare_func);
- if (!pid_set)
- return -ENOMEM;
+ return res;
+}
- q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set);
- if (q < 0)
- if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
- r = q;
+void user_elect_display(User *u) {
+ Session *graphical = NULL, *text = NULL, *other = NULL, *s;
- if (pid_set)
- set_free(pid_set);
+ assert(u);
- return r;
+ /* This elects a primary session for each user, which we call
+ * the "display". We try to keep the assignment stable, but we
+ * "upgrade" to better choices. */
+
+ LIST_FOREACH(sessions_by_user, s, u->sessions) {
+
+ if (s->class != SESSION_USER)
+ continue;
+
+ if (s->stopping)
+ continue;
+
+ if (SESSION_TYPE_IS_GRAPHICAL(s->type))
+ graphical = s;
+ else if (s->type == SESSION_TTY)
+ text = s;
+ else
+ other = s;
+ }
+
+ if (graphical &&
+ (!u->display ||
+ u->display->class != SESSION_USER ||
+ u->display->stopping ||
+ !SESSION_TYPE_IS_GRAPHICAL(u->display->type))) {
+ u->display = graphical;
+ return;
+ }
+
+ if (text &&
+ (!u->display ||
+ u->display->class != SESSION_USER ||
+ u->display->stopping ||
+ u->display->type != SESSION_TTY)) {
+ u->display = text;
+ return;
+ }
+
+ if (other &&
+ (!u->display ||
+ u->display->class != SESSION_USER ||
+ u->display->stopping))
+ u->display = other;
}
static const char* const user_state_table[_USER_STATE_MAX] = {
[USER_OFFLINE] = "offline",
+ [USER_OPENING] = "opening",
[USER_LINGERING] = "lingering",
[USER_ONLINE] = "online",
[USER_ACTIVE] = "active",
};
DEFINE_STRING_TABLE_LOOKUP(user_state, UserState);
+
+int config_parse_tmpfs_size(
+ const char* unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ size_t *sz = data;
+ const char *e;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ e = endswith(rvalue, "%");
+ if (e) {
+ unsigned long ul;
+ char *f;
+
+ errno = 0;
+ ul = strtoul(rvalue, &f, 10);
+ if (errno != 0 || f != e) {
+ log_syntax(unit, LOG_ERR, filename, line, errno ? errno : EINVAL, "Failed to parse percentage value, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ if (ul <= 0 || ul >= 100) {
+ log_syntax(unit, LOG_ERR, filename, line, errno ? errno : EINVAL, "Percentage value out of range, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ *sz = PAGE_ALIGN((size_t) ((physical_memory() * (uint64_t) ul) / (uint64_t) 100));
+ } else {
+ off_t o;
+
+ r = parse_size(rvalue, 1024, &o);
+ if (r < 0 || (off_t) (size_t) o != o) {
+ log_syntax(unit, LOG_ERR, filename, line, r < 0 ? -r : ERANGE, "Failed to parse size value, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ *sz = PAGE_ALIGN((size_t) o);
+ }
+
+ return 0;
+}
~ianmdlvl / elogind.git / blobdiff