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Diffstat (limited to 'src/logind.c')
-rw-r--r--src/logind.c313
1 files changed, 195 insertions, 118 deletions
diff --git a/src/logind.c b/src/logind.c
index 7e9b706d13..5d5181a1bb 100644
--- a/src/logind.c
+++ b/src/logind.c
@@ -200,7 +200,6 @@ int manager_add_session(Manager *m, User *u, const char *id, Session **_session)
int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **_user) {
User *u;
- int r;
assert(m);
assert(name);
@@ -217,16 +216,10 @@ int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **
if (!u)
return -ENOMEM;
- r = user_start(u);
- if (r < 0) {
- user_stop(u);
- user_free(u);
- } else {
- if (_user)
- *_user = u;
- }
+ if (_user)
+ *_user = u;
- return r;
+ return 0;
}
int manager_add_user_by_name(Manager *m, const char *name, User **_user) {
@@ -257,33 +250,53 @@ int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) {
}
int manager_process_device(Manager *m, struct udev_device *d) {
- const char *sn;
- Seat *seat;
Device *device;
int r;
assert(m);
- sn = udev_device_get_property_value(d, "SEAT");
- if (!sn)
- sn = "seat0";
+ if (streq_ptr(udev_device_get_action(d), "remove")) {
- r = manager_add_device(m, udev_device_get_syspath(d), &device);
- if (r < 0)
- return r;
+ device = hashmap_get(m->devices, udev_device_get_syspath(d));
+ if (!device)
+ return 0;
- r = manager_add_seat(m, sn, &seat);
- if (r < 0)
- return r;
+ seat_add_to_gc_queue(device->seat);
+ device_free(device);
+
+ } else {
+ const char *sn;
+ Seat *seat;
+
+ sn = udev_device_get_property_value(d, "SEAT");
+ if (!sn)
+ sn = "seat0";
+
+ if (!startswith(sn, "seat"))
+ return -EINVAL;
+
+ r = manager_add_device(m, udev_device_get_syspath(d), &device);
+ if (r < 0)
+ return r;
+
+ r = manager_add_seat(m, sn, &seat);
+ if (r < 0) {
+ if (!device->seat)
+ device_free(device);
+
+ return r;
+ }
+
+ device_attach(device, seat);
+ }
- device_attach(device, seat);
return 0;
}
int manager_enumerate_devices(Manager *m) {
struct udev_list_entry *item = NULL, *first = NULL;
struct udev_enumerate *e;
- int r = -ENOMEM;
+ int r;
assert(m);
@@ -291,16 +304,21 @@ int manager_enumerate_devices(Manager *m) {
* necessary */
e = udev_enumerate_new(m->udev);
- if (!e)
+ if (!e) {
+ r = -ENOMEM;
goto finish;
+ }
- if (udev_enumerate_add_match_subsystem(e, "graphics") < 0)
+ r = udev_enumerate_add_match_subsystem(e, "graphics");
+ if (r < 0)
goto finish;
- if (udev_enumerate_add_match_tag(e, "seat") < 0)
+ r = udev_enumerate_add_match_tag(e, "seat");
+ if (r < 0)
goto finish;
- if (udev_enumerate_scan_devices(e) < 0)
+ r = udev_enumerate_scan_devices(e);
+ if (r < 0)
goto finish;
first = udev_enumerate_get_list_entry(e);
@@ -309,8 +327,10 @@ int manager_enumerate_devices(Manager *m) {
int k;
d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
- if (!d)
+ if (!d) {
+ r = -ENOMEM;
goto finish;
+ }
k = manager_process_device(m, d);
udev_device_unref(d);
@@ -353,6 +373,9 @@ int manager_enumerate_seats(Manager *m) {
if (!dirent_is_file(de))
continue;
+ if (!startswith(de->d_name, "seat"))
+ continue;
+
s = hashmap_get(m->seats, de->d_name);
if (!s) {
unlinkat(dirfd(d), de->d_name, 0);
@@ -385,24 +408,61 @@ static int manager_enumerate_users_from_cgroup(Manager *m) {
while ((r = cg_read_subgroup(d, &name)) > 0) {
User *user;
+ int k;
+
+ k = manager_add_user_by_name(m, name, &user);
+ if (k < 0) {
+ free(name);
+ r = k;
+ continue;
+ }
+
+ user_add_to_gc_queue(user);
+
+ if (!user->cgroup_path)
+ if (asprintf(&user->cgroup_path, "%s/%s", m->cgroup_path, name) < 0) {
+ r = -ENOMEM;
+ free(name);
+ break;
+ }
- r = manager_add_user_by_name(m, name, &user);
free(name);
+ }
+
+ closedir(d);
+
+ return r;
+}
- if (r < 0)
- break;
- if (user->cgroup_path)
+static int manager_enumerate_linger_users(Manager *m) {
+ DIR *d;
+ struct dirent *de;
+ int r = 0;
+
+ d = opendir("/var/lib/systemd/linger");
+ if (!d) {
+ if (errno == ENOENT)
+ return 0;
+
+ log_error("Failed to open /var/lib/systemd/linger/: %m");
+ return -errno;
+ }
+
+ while ((de = readdir(d))) {
+ int k;
+
+ if (!dirent_is_file(de))
continue;
- if (asprintf(&user->cgroup_path, "%s/%s", m->cgroup_path, name) < 0) {
- r = -ENOMEM;
- break;
+ k = manager_add_user_by_name(m, de->d_name, NULL);
+ if (k < 0) {
+ log_notice("Couldn't add lingering user %s: %s", de->d_name, strerror(-k));
+ r = k;
}
}
- if (d)
- closedir(d);
+ closedir(d);
return r;
}
@@ -410,12 +470,19 @@ static int manager_enumerate_users_from_cgroup(Manager *m) {
int manager_enumerate_users(Manager *m) {
DIR *d;
struct dirent *de;
- int r;
+ int r, k;
assert(m);
+ /* First, enumerate user cgroups */
r = manager_enumerate_users_from_cgroup(m);
+ /* Second, add lingering users on top */
+ k = manager_enumerate_linger_users(m);
+ if (k < 0)
+ r = k;
+
+ /* Third, read in user data stored on disk */
d = opendir("/run/systemd/users");
if (!d) {
if (errno == ENOENT)
@@ -428,7 +495,6 @@ int manager_enumerate_users(Manager *m) {
while ((de = readdir(d))) {
unsigned long ul;
User *u;
- int k;
if (!dirent_is_file(de))
continue;
@@ -465,6 +531,9 @@ static int manager_enumerate_sessions_from_cgroup(Manager *m) {
char *name;
int k;
+ if (!u->cgroup_path)
+ continue;
+
k = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, &d);
if (k < 0) {
if (k == -ENOENT)
@@ -479,18 +548,21 @@ static int manager_enumerate_sessions_from_cgroup(Manager *m) {
Session *session;
k = manager_add_session(m, u, name, &session);
- free(name);
-
- if (k < 0)
+ if (k < 0) {
+ free(name);
break;
+ }
- if (session->cgroup_path)
- continue;
+ session_add_to_gc_queue(session);
- if (asprintf(&session->cgroup_path, "%s/%s", u->cgroup_path, name) < 0) {
- k = -ENOMEM;
- break;
- }
+ if (!session->cgroup_path)
+ if (asprintf(&session->cgroup_path, "%s/%s", u->cgroup_path, name) < 0) {
+ k = -ENOMEM;
+ free(name);
+ break;
+ }
+
+ free(name);
}
closedir(d);
@@ -509,8 +581,10 @@ int manager_enumerate_sessions(Manager *m) {
assert(m);
+ /* First enumerate session cgroups */
r = manager_enumerate_sessions_from_cgroup(m);
+ /* Second, read in session data stored on disk */
d = opendir("/run/systemd/sessions");
if (!d) {
if (errno == ENOENT)
@@ -543,38 +617,6 @@ int manager_enumerate_sessions(Manager *m) {
return r;
}
-int manager_start_linger_users(Manager *m) {
- DIR *d;
- struct dirent *de;
- int r = 0;
-
- d = opendir("/var/lib/systemd/linger");
- if (!d) {
- if (errno == ENOENT)
- return 0;
-
- log_error("Failed to open /var/lib/systemd/linger/: %m");
- return -errno;
- }
-
- while ((de = readdir(d))) {
- int k;
-
- if (!dirent_is_file(de))
- continue;
-
- k = manager_add_user_by_name(m, de->d_name, NULL);
- if (k < 0) {
- log_notice("Couldn't add lingering user %s: %s", de->d_name, strerror(-k));
- r = k;
- }
- }
-
- closedir(d);
-
- return r;
-}
-
int manager_dispatch_udev(Manager *m) {
struct udev_device *d;
int r;
@@ -592,39 +634,10 @@ int manager_dispatch_udev(Manager *m) {
}
int manager_dispatch_console(Manager *m) {
- char t[64];
- ssize_t k;
- int r, vtnr;
-
assert(m);
- lseek(m->console_active_fd, SEEK_SET, 0);
-
- k = read(m->console_active_fd, t, sizeof(t)-1);
- if (k <= 0) {
- log_error("Failed to read current console: %s", k < 0 ? strerror(-errno) : "EOF");
- return k < 0 ? -errno : -EIO;
- }
-
- t[k] = 0;
- if (!startswith(t, "tty")) {
- log_error("Hm, /sys/class/tty/tty0/active is badly formatted.");
- return -EIO;
- }
-
- r = safe_atoi(t+3, &vtnr);
- if (r < 0) {
- log_error("Failed to parse VT number %s", t+3);
- return r;
- }
-
- if (vtnr <= 0) {
- log_error("VT number invalid: %s", t+3);
- return -EIO;
- }
-
if (m->vtconsole)
- seat_active_vt_changed(m->vtconsole, vtnr);
+ seat_read_active_vt(m->vtconsole);
return 0;
}
@@ -766,7 +779,7 @@ static int manager_connect_console(Manager *m) {
}
zero(ev);
- ev.events = EPOLLIN;
+ ev.events = 0;
ev.data.u32 = FD_CONSOLE;
if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->console_active_fd, &ev) < 0)
@@ -777,6 +790,7 @@ static int manager_connect_console(Manager *m) {
static int manager_connect_udev(Manager *m) {
struct epoll_event ev;
+ int r;
assert(m);
assert(!m->udev_monitor);
@@ -785,13 +799,17 @@ static int manager_connect_udev(Manager *m) {
if (!m->udev_monitor)
return -ENOMEM;
- udev_monitor_filter_add_match_tag(m->udev_monitor, "seat");
+ r = udev_monitor_filter_add_match_tag(m->udev_monitor, "seat");
+ if (r < 0)
+ return r;
- if (udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "graphics", NULL) < 0)
- return -ENOMEM;
+ r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "graphics", NULL);
+ if (r < 0)
+ return r;
- if (udev_monitor_enable_receiving(m->udev_monitor) < 0)
- return -ENOMEM;
+ r = udev_monitor_enable_receiving(m->udev_monitor);
+ if (r < 0)
+ return r;
m->udev_fd = udev_monitor_get_fd(m->udev_monitor);
@@ -805,8 +823,50 @@ static int manager_connect_udev(Manager *m) {
return 0;
}
+void manager_gc(Manager *m) {
+ Seat *seat;
+ Session *session;
+ User *user;
+
+ assert(m);
+
+ while ((seat = m->seat_gc_queue)) {
+ LIST_REMOVE(Seat, gc_queue, m->seat_gc_queue, seat);
+ seat->in_gc_queue = false;
+
+ if (seat_check_gc(seat) == 0) {
+ seat_stop(seat);
+ seat_free(seat);
+ }
+ }
+
+ while ((session = m->session_gc_queue)) {
+ LIST_REMOVE(Session, gc_queue, m->session_gc_queue, session);
+ session->in_gc_queue = false;
+
+ if (session_check_gc(session) == 0) {
+ session_stop(session);
+ session_free(session);
+ }
+ }
+
+ while ((user = m->user_gc_queue)) {
+ LIST_REMOVE(User, gc_queue, m->user_gc_queue, user);
+ user->in_gc_queue = false;
+
+ if (user_check_gc(user) == 0) {
+ user_stop(user);
+ user_free(user);
+ }
+ }
+}
+
int manager_startup(Manager *m) {
int r;
+ Seat *seat;
+ Session *session;
+ User *user;
+ Iterator i;
assert(m);
assert(m->epoll_fd <= 0);
@@ -830,14 +890,29 @@ int manager_startup(Manager *m) {
if (r < 0)
return r;
+ /* Instantiate magic seat 0 */
+ r = manager_add_seat(m, "seat0", &m->vtconsole);
+ if (r < 0)
+ return r;
+
/* Deserialize state */
manager_enumerate_devices(m);
manager_enumerate_seats(m);
manager_enumerate_users(m);
manager_enumerate_sessions(m);
- /* Spawn lingering users */
- manager_start_linger_users(m);
+ /* Get rid of objects that are no longer used */
+ manager_gc(m);
+
+ /* And start everything */
+ HASHMAP_FOREACH(seat, m->seats, i)
+ seat_start(seat);
+
+ HASHMAP_FOREACH(user, m->users, i)
+ user_start(user);
+
+ HASHMAP_FOREACH(session, m->sessions, i)
+ session_start(session);
return 0;
}
@@ -849,6 +924,8 @@ int manager_run(Manager *m) {
struct epoll_event event;
int n;
+ manager_gc(m);
+
if (dbus_connection_dispatch(m->bus) != DBUS_DISPATCH_COMPLETE)
continue;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-13 02:56:51 +0000