-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
/***
This file is part of systemd.
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include <errno.h>
#include <string.h>
+#include <sys/mount.h>
#include <unistd.h>
-#include <errno.h>
-#include "util.h"
-#include "mkdir.h"
-#include "cgroup-util.h"
-#include "hashmap.h"
-#include "strv.h"
+#include "alloc-util.h"
+#include "bus-common-errors.h"
+#include "bus-error.h"
+#include "bus-util.h"
+#include "clean-ipc.h"
+#include "conf-parser.h"
+#include "escape.h"
+#include "fd-util.h"
#include "fileio.h"
-#include "special.h"
-#include "unit-name.h"
-#include "dbus-common.h"
+#include "formats-util.h"
+#include "fs-util.h"
+#include "hashmap.h"
+#include "label.h"
#include "logind-user.h"
+#include "mkdir.h"
+#include "mount-util.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "rm-rf.h"
+#include "smack-util.h"
+//#include "special.h"
+#include "stdio-util.h"
+#include "string-table.h"
+#include "unit-name.h"
+#include "user-util.h"
+#include "util.h"
-User* user_new(Manager *m, uid_t uid, gid_t gid, const char *name) {
- User *u;
+int user_new(User **out, Manager *m, uid_t uid, gid_t gid, const char *name) {
+ _cleanup_(user_freep) User *u = NULL;
+ char lu[DECIMAL_STR_MAX(uid_t) + 1];
+ int r;
+ assert(out);
assert(m);
assert(name);
u = new0(User, 1);
if (!u)
- return NULL;
+ return -ENOMEM;
+
+ u->manager = m;
+ u->uid = uid;
+ u->gid = gid;
+ xsprintf(lu, UID_FMT, uid);
u->name = strdup(name);
if (!u->name)
- goto fail;
+ return -ENOMEM;
- if (asprintf(&u->state_file, "/run/systemd/users/%lu", (unsigned long) uid) < 0)
- goto fail;
+ if (asprintf(&u->state_file, "/run/systemd/users/"UID_FMT, uid) < 0)
+ return -ENOMEM;
- if (hashmap_put(m->users, ULONG_TO_PTR((unsigned long) uid), u) < 0)
- goto fail;
+ if (asprintf(&u->runtime_path, "/run/user/"UID_FMT, uid) < 0)
+ return -ENOMEM;
- u->manager = m;
- u->uid = uid;
- u->gid = gid;
+ r = slice_build_subslice("user.slice", lu, &u->slice);
+ if (r < 0)
+ return r;
- return u;
+ r = unit_name_build("user", lu, ".service", &u->service);
+ if (r < 0)
+ return r;
-fail:
- free(u->state_file);
- free(u->name);
- free(u);
+ r = hashmap_put(m->users, UID_TO_PTR(uid), u);
+ if (r < 0)
+ return r;
+
+ r = hashmap_put(m->user_units, u->slice, u);
+ if (r < 0)
+ return r;
- return NULL;
+ r = hashmap_put(m->user_units, u->service, u);
+ if (r < 0)
+ return r;
+
+ *out = u;
+ u = NULL;
+ return 0;
}
-void user_free(User *u) {
- assert(u);
+User *user_free(User *u) {
+ if (!u)
+ return NULL;
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->slice) {
- hashmap_remove(u->manager->user_units, u->slice);
- free(u->slice);
- }
+ if (u->service)
+ hashmap_remove_value(u->manager->user_units, u->service, u);
- if (u->service) {
- hashmap_remove(u->manager->user_units, u->service);
- free(u->service);
- }
+ if (u->slice)
+ hashmap_remove_value(u->manager->user_units, u->slice, u);
- free(u->slice_job);
- free(u->service_job);
+ hashmap_remove_value(u->manager->users, UID_TO_PTR(u->uid), u);
- free(u->runtime_path);
+#if 0 /// elogind neither supports slice nor service jobs.
+ u->slice_job = mfree(u->slice_job);
+ u->service_job = mfree(u->service_job);
+#endif // 0
- hashmap_remove(u->manager->users, ULONG_TO_PTR((unsigned long) u->uid));
+ u->service = mfree(u->service);
+ u->slice = mfree(u->slice);
+ u->runtime_path = mfree(u->runtime_path);
+ u->state_file = mfree(u->state_file);
+ u->name = mfree(u->name);
- free(u->name);
- free(u->state_file);
- free(u);
+ return mfree(u);
}
-int user_save(User *u) {
+static int user_save_internal(User *u) {
_cleanup_free_ char *temp_path = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(u);
assert(u->state_file);
- if (!u->started)
- return 0;
-
r = mkdir_safe_label("/run/systemd/users", 0755, 0, 0);
if (r < 0)
- goto finish;
+ goto fail;
r = fopen_temporary(u->state_file, &f, &temp_path);
if (r < 0)
- goto finish;
+ goto fail;
fchmod(fileno(f), 0644);
u->name,
user_state_to_string(user_get_state(u)));
+ /* LEGACY: no-one reads RUNTIME= anymore, drop it at some point */
if (u->runtime_path)
fprintf(f, "RUNTIME=%s\n", u->runtime_path);
- if (u->service)
- fprintf(f, "SERVICE=%s\n", u->service);
+#if 0 /// elogind neither supports service nor slice jobs
if (u->service_job)
fprintf(f, "SERVICE_JOB=%s\n", u->service_job);
- if (u->slice)
- fprintf(f, "SLICE=%s\n", u->slice);
if (u->slice_job)
fprintf(f, "SLICE_JOB=%s\n", u->slice_job);
+#endif // 0
if (u->display)
fprintf(f, "DISPLAY=%s\n", u->display->id);
if (dual_timestamp_is_set(&u->timestamp))
fprintf(f,
- "REALTIME=%llu\n"
- "MONOTONIC=%llu\n",
- (unsigned long long) u->timestamp.realtime,
- (unsigned long long) u->timestamp.monotonic);
+ "REALTIME="USEC_FMT"\n"
+ "MONOTONIC="USEC_FMT"\n",
+ u->timestamp.realtime,
+ u->timestamp.monotonic);
if (u->sessions) {
Session *i;
fputc('\n', f);
}
- fflush(f);
+ r = fflush_and_check(f);
+ if (r < 0)
+ goto fail;
- if (ferror(f) || rename(temp_path, u->state_file) < 0) {
+ if (rename(temp_path, u->state_file) < 0) {
r = -errno;
- unlink(u->state_file);
- unlink(temp_path);
+ goto fail;
}
-finish:
- if (r < 0)
- log_error("Failed to save user data for %s: %s", u->name, strerror(-r));
+ return 0;
- return r;
+fail:
+ (void) unlink(u->state_file);
+
+ if (temp_path)
+ (void) unlink(temp_path);
+
+ return log_error_errno(r, "Failed to save user data %s: %m", u->state_file);
+}
+
+int user_save(User *u) {
+ assert(u);
+
+ if (!u->started)
+ return 0;
+
+ return user_save_internal (u);
}
int user_load(User *u) {
assert(u);
r = parse_env_file(u->state_file, NEWLINE,
- "RUNTIME", &u->runtime_path,
- "SERVICE", &u->service,
+#if 0 /// elogind neither supports service nor slice jobs
"SERVICE_JOB", &u->service_job,
- "SLICE", &u->slice,
"SLICE_JOB", &u->slice_job,
+#endif // 0
"DISPLAY", &display,
"REALTIME", &realtime,
"MONOTONIC", &monotonic,
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 (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;
- }
+ if (realtime)
+ timestamp_deserialize(realtime, &u->timestamp.realtime);
+ if (monotonic)
+ timestamp_deserialize(monotonic, &u->timestamp.monotonic);
return r;
}
static int user_mkdir_runtime_path(User *u) {
- char *p;
int 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)
- return log_oom();
- } else
- p = u->runtime_path;
+ if (path_is_mount_point(u->runtime_path, 0) <= 0) {
+ _cleanup_free_ char *t = NULL;
- 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;
+ (void) mkdir_label(u->runtime_path, 0700);
+
+ 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;
+ }
+
+ r = mount("tmpfs", u->runtime_path, "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", u->runtime_path);
+ goto fail;
+ }
+
+ /* Lacking permissions, maybe
+ * CAP_SYS_ADMIN-less container? In this case,
+ * just use a normal directory. */
+
+ r = chmod_and_chown(u->runtime_path, 0700, u->uid, u->gid);
+ if (r < 0) {
+ log_error_errno(r, "Failed to change runtime directory ownership and mode: %m");
+ goto fail;
+ }
+ }
+
+ r = label_fix(u->runtime_path, false, false);
+ if (r < 0)
+ log_warning_errno(r, "Failed to fix label of '%s', ignoring: %m", u->runtime_path);
}
- u->runtime_path = p;
return 0;
+
+fail:
+ /* Try to clean up, but ignore errors */
+ (void) rmdir(u->runtime_path);
+ return r;
}
static int user_start_slice(User *u) {
- DBusError error;
+#if 0 /// elogind can not ask systemd via dbus to start user services
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ const char *description;
char *job;
int r;
assert(u);
- dbus_error_init(&error);
-
- if (!u->slice) {
- char lu[DECIMAL_STR_MAX(unsigned long) + 1];
- sprintf(lu, "%lu", (unsigned long) u->uid);
-
- r = build_subslice(SPECIAL_USER_SLICE, lu, &u->slice);
- if (r < 0)
- return r;
-
- r = hashmap_put(u->manager->user_units, u->slice, u);
- if (r < 0)
- log_warning("Failed to create mapping between unit and user");
- }
-
- r = manager_start_unit(u->manager, u->slice, &error, &job);
- if (r < 0) {
- log_error("Failed to start user slice: %s", bus_error(&error, r));
- dbus_error_free(&error);
- }
+ u->slice_job = mfree(u->slice_job);
+ description = strjoina("User Slice of ", u->name);
+
+ r = manager_start_slice(
+ u->manager,
+ u->slice,
+ description,
+ "systemd-logind.service",
+ "systemd-user-sessions.service",
+ u->manager->user_tasks_max,
+ &error,
+ &job);
+ if (r >= 0)
+ u->slice_job = job;
+ else if (!sd_bus_error_has_name(&error, BUS_ERROR_UNIT_EXISTS))
+ /* we don't fail due to this, let's try to continue */
+ log_error_errno(r, "Failed to start user slice %s, ignoring: %s (%s)",
+ u->slice, bus_error_message(&error, r), error.name);
+#else
+ assert(u);
- free(u->slice_job);
- u->slice_job = job;
+ hashmap_put(u->manager->user_units, u->slice, u);
+#endif // 0
return 0;
}
static int user_start_service(User *u) {
- DBusError error;
+#if 0 /// elogind can not ask systemd via dbus to start user services
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
char *job;
int r;
assert(u);
- dbus_error_init(&error);
+ u->service_job = mfree(u->service_job);
- if (!u->service) {
- char lu[DECIMAL_STR_MAX(unsigned long) + 1];
- sprintf(lu, "%lu", (unsigned long) u->uid);
-
- u->service = unit_name_build("user", lu, ".service");
- if (!u->service)
- return log_oom();
-
- r = hashmap_put(u->manager->user_units, u->service, u);
- if (r < 0)
- log_warning("Failed to create mapping between service and user");
- }
-
- r = manager_start_unit(u->manager, u->service, &error, &job);
+ r = manager_start_unit(
+ u->manager,
+ u->service,
+ &error,
+ &job);
if (r < 0) {
- log_error("Failed to start user service: %s", bus_error(&error, r));
- dbus_error_free(&error);
+ /* we don't fail due to this, let's try to continue */
+ log_error_errno(r, "Failed to start user service, ignoring: %s", bus_error_message(&error, r));
+ } else {
+ u->service_job = job;
}
+#else
+ assert(u);
- free(u->service_job);
- u->service_job = job;
+ hashmap_put(u->manager->user_units, u->service, u);
+#endif // 0
return 0;
}
assert(u);
- if (u->started)
+ if (u->started && !u->stopping)
return 0;
- log_debug("New user %s logged in.", u->name);
-
- /* Make XDG_RUNTIME_DIR */
- r = user_mkdir_runtime_path(u);
- if (r < 0)
- return r;
+ /*
+ * If u->stopping is set, the user is marked for removal and the slice
+ * and service stop-jobs are queued. We have to clear that flag before
+ * queing the start-jobs again. If they succeed, the user object can be
+ * re-used just fine (pid1 takes care of job-ordering and proper
+ * restart), but if they fail, we want to force another user_stop() so
+ * possibly pending units are stopped.
+ * Note that we don't clear u->started, as we have no clue what state
+ * the user is in on failure here. Hence, we pretend the user is
+ * running so it will be properly taken down by GC. However, we clearly
+ * return an error from user_start() in that case, so no further
+ * reference to the user is taken.
+ */
+ u->stopping = false;
+
+ if (!u->started) {
+ log_debug("New user %s logged in.", u->name);
+
+ /* Make XDG_RUNTIME_DIR */
+ r = user_mkdir_runtime_path(u);
+ if (r < 0)
+ return r;
+ }
/* Create cgroup */
r = user_start_slice(u);
if (r < 0)
return r;
+ /* Save the user data so far, because pam_systemd will read the
+ * XDG_RUNTIME_DIR out of it while starting up systemd --user.
+ * We need to do user_save_internal() because we have not
+ * "officially" started yet. */
+ user_save_internal(u);
+
/* Spawn user systemd */
r = user_start_service(u);
if (r < 0)
return r;
- if (!dual_timestamp_is_set(&u->timestamp))
- dual_timestamp_get(&u->timestamp);
-
- u->started = true;
+ if (!u->started) {
+ if (!dual_timestamp_is_set(&u->timestamp))
+ dual_timestamp_get(&u->timestamp);
+ user_send_signal(u, true);
+ u->started = true;
+ }
/* Save new user data */
user_save(u);
- user_send_signal(u, true);
-
return 0;
}
+#if 0 /// UNNEEDED by elogind
static int user_stop_slice(User *u) {
- DBusError error;
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
char *job;
int r;
assert(u);
- dbus_error_init(&error);
-
- if (!u->slice)
- return 0;
-
r = manager_stop_unit(u->manager, u->slice, &error, &job);
if (r < 0) {
- log_error("Failed to stop user slice: %s", bus_error(&error, r));
- dbus_error_free(&error);
+ log_error("Failed to stop user slice: %s", bus_error_message(&error, r));
return r;
}
}
static int user_stop_service(User *u) {
- DBusError error;
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
char *job;
int r;
assert(u);
- dbus_error_init(&error);
-
- if (!u->service)
- return 0;
-
r = manager_stop_unit(u->manager, u->service, &error, &job);
if (r < 0) {
- log_error("Failed to stop user service: %s", bus_error(&error, r));
- dbus_error_free(&error);
+ log_error("Failed to stop user service: %s", bus_error_message(&error, r));
return r;
}
return r;
}
-
-/* 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); */
-/* } */
+#endif // 0
static int user_remove_runtime_path(User *u) {
int r;
assert(u);
- if (!u->runtime_path)
- return 0;
-
- r = rm_rf(u->runtime_path, false, true, false);
+ r = rm_rf(u->runtime_path, 0);
if (r < 0)
- log_error("Failed to remove runtime directory %s: %s", u->runtime_path, strerror(-r));
+ log_error_errno(r, "Failed to remove runtime directory %s: %m", u->runtime_path);
+
+ /* 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);
- free(u->runtime_path);
- u->runtime_path = NULL;
+ 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);
return r;
}
-int user_stop(User *u) {
+int user_stop(User *u, bool force) {
Session *s;
int r = 0, k;
assert(u);
- if (u->started)
- log_debug("User %s logged out.", u->name);
+ /* Stop jobs have already been queued */
+ if (u->stopping) {
+ user_save(u);
+ return r;
+ }
LIST_FOREACH(sessions_by_user, s, u->sessions) {
- k = session_stop(s);
+ k = session_stop(s, force);
if (k < 0)
r = k;
}
/* Kill systemd */
+#if 0 /// elogind does not support service or slice jobs
k = user_stop_service(u);
if (k < 0)
r = k;
k = user_stop_slice(u);
if (k < 0)
r = k;
+#endif // 0
+
+ u->stopping = true;
+
+ user_save(u);
+
+ return r;
+}
+
+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_finalize(s);
+ 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;
}
int user_get_idle_hint(User *u, dual_timestamp *t) {
Session *s;
bool idle_hint = true;
- dual_timestamp ts = { 0, 0 };
+ dual_timestamp ts = DUAL_TIMESTAMP_NULL;
assert(u);
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) {
+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;
+ return true;
- return 0;
+#if 0 /// elogind neither supports service nor slice jobs
+ if (u->slice_job && manager_job_is_active(u->manager, u->slice_job))
+ return true;
+
+ if (u->service_job && manager_job_is_active(u->manager, u->service_job))
+ return true;
+#endif // 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->slice_job || u->service_job)
- return u->started ? USER_OPENING : USER_CLOSING;
+ 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 0 /// elogind neither supports service nor slice jobs.
+ if (!u->started || u->slice_job || u->service_job)
+#else
+ if (!u->started)
+#endif // 0
+ return USER_OPENING;
+
+ 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) {
+#if 0 /// Without systemd unit support, elogind has to rely on its session system
assert(u);
- if (!u->slice)
- return -ESRCH;
-
return manager_kill_unit(u->manager, u->slice, KILL_ALL, signo, NULL);
+#else
+ Session *s;
+ int res = 0;
+
+ assert(u);
+
+ LIST_FOREACH(sessions_by_user, s, u->sessions) {
+ int r = session_kill(s, KILL_ALL, signo);
+ if (res == 0 && r < 0)
+ res = r;
+ }
+
+ return res;
+#endif // 0
+}
+
+static bool elect_display_filter(Session *s) {
+ /* Return true if the session is a candidate for the user’s ‘primary
+ * session’ or ‘display’. */
+ assert(s);
+
+ return (s->class == SESSION_USER && !s->stopping);
+}
+
+static int elect_display_compare(Session *s1, Session *s2) {
+ /* Indexed by SessionType. Lower numbers mean more preferred. */
+ const int type_ranks[_SESSION_TYPE_MAX] = {
+ [SESSION_UNSPECIFIED] = 0,
+ [SESSION_TTY] = -2,
+ [SESSION_X11] = -3,
+ [SESSION_WAYLAND] = -3,
+ [SESSION_MIR] = -3,
+ [SESSION_WEB] = -1,
+ };
+
+ /* Calculate the partial order relationship between s1 and s2,
+ * returning < 0 if s1 is preferred as the user’s ‘primary session’,
+ * 0 if s1 and s2 are equally preferred or incomparable, or > 0 if s2
+ * is preferred.
+ *
+ * s1 or s2 may be NULL. */
+ if (!s1 && !s2)
+ return 0;
+
+ if ((s1 == NULL) != (s2 == NULL))
+ return (s1 == NULL) - (s2 == NULL);
+
+ if (s1->stopping != s2->stopping)
+ return s1->stopping - s2->stopping;
+
+ if ((s1->class != SESSION_USER) != (s2->class != SESSION_USER))
+ return (s1->class != SESSION_USER) - (s2->class != SESSION_USER);
+
+ if ((s1->type == _SESSION_TYPE_INVALID) != (s2->type == _SESSION_TYPE_INVALID))
+ return (s1->type == _SESSION_TYPE_INVALID) - (s2->type == _SESSION_TYPE_INVALID);
+
+ if (s1->type != s2->type)
+ return type_ranks[s1->type] - type_ranks[s2->type];
+
+ return 0;
+}
+
+void user_elect_display(User *u) {
+ Session *s;
+
+ assert(u);
+
+ /* 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. */
+ log_debug("Electing new display for user %s", u->name);
+
+ LIST_FOREACH(sessions_by_user, s, u->sessions) {
+ if (!elect_display_filter(s)) {
+ log_debug("Ignoring session %s", s->id);
+ continue;
+ }
+
+ if (elect_display_compare(s, u->display) < 0) {
+ log_debug("Choosing session %s in preference to %s", s->id, u->display ? u->display->id : "-");
+ u->display = s;
+ }
+ }
}
static const char* const user_state_table[_USER_STATE_MAX] = {
};
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, "Failed to parse percentage value, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ if (ul <= 0 || ul >= 100) {
+ log_syntax(unit, LOG_ERR, filename, line, 0, "Percentage value out of range, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ *sz = PAGE_ALIGN((size_t) ((physical_memory() * (uint64_t) ul) / (uint64_t) 100));
+ } else {
+ uint64_t k;
+
+ r = parse_size(rvalue, 1024, &k);
+ if (r < 0 || (uint64_t) (size_t) k != k) {
+ log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ *sz = PAGE_ALIGN((size_t) k);
+ }
+
+ return 0;
+}
~ianmdlvl / elogind.git / blobdiff