X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Flogin%2Flogind.c;h=07755831477e6c3a36287f375a067f7d656e288e;hp=0df6b8964c887ecc59225d7524d6af97d04a4add;hb=d05c5031ad4c528fe6bbfed289519edb9f13180a;hpb=e6960940b6dc5ab81eb2fca4061c333e1795f38d
diff --git a/src/login/logind.c b/src/login/logind.c
index 0df6b8964..077558314 100644
--- a/src/login/logind.c
+++ b/src/login/logind.c
@@ -6,16 +6,16 @@
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
+ 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
- General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see .
***/
@@ -29,6 +29,8 @@
#include
#include
+#include
+
#include "logind.h"
#include "dbus-common.h"
#include "dbus-loop.h"
@@ -46,17 +48,32 @@ Manager *manager_new(void) {
m->bus_fd = -1;
m->udev_seat_fd = -1;
m->udev_vcsa_fd = -1;
+ m->udev_button_fd = -1;
m->epoll_fd = -1;
+
m->n_autovts = 6;
+ m->inhibit_delay_max = 5 * USEC_PER_SEC;
+ m->handle_power_key = HANDLE_NO_SESSION;
+ m->handle_sleep_key = HANDLE_TTY_SESSION;
+ m->handle_lid_switch = HANDLE_OFF;
m->devices = hashmap_new(string_hash_func, string_compare_func);
m->seats = hashmap_new(string_hash_func, string_compare_func);
m->sessions = hashmap_new(string_hash_func, string_compare_func);
m->users = hashmap_new(trivial_hash_func, trivial_compare_func);
- m->cgroups = hashmap_new(string_hash_func, string_compare_func);
- m->fifo_fds = hashmap_new(trivial_hash_func, trivial_compare_func);
+ m->inhibitors = hashmap_new(string_hash_func, string_compare_func);
+ m->buttons = hashmap_new(string_hash_func, string_compare_func);
+
+ m->user_cgroups = hashmap_new(string_hash_func, string_compare_func);
+ m->session_cgroups = hashmap_new(string_hash_func, string_compare_func);
- if (!m->devices || !m->seats || !m->sessions || !m->users || !m->cgroups || !m->fifo_fds) {
+ m->session_fds = hashmap_new(trivial_hash_func, trivial_compare_func);
+ m->inhibitor_fds = hashmap_new(trivial_hash_func, trivial_compare_func);
+ m->button_fds = hashmap_new(trivial_hash_func, trivial_compare_func);
+
+ if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons ||
+ !m->user_cgroups || !m->session_cgroups ||
+ !m->session_fds || !m->inhibitor_fds || !m->button_fds) {
manager_free(m);
return NULL;
}
@@ -87,6 +104,8 @@ void manager_free(Manager *m) {
User *u;
Device *d;
Seat *s;
+ Inhibitor *i;
+ Button *b;
assert(m);
@@ -102,21 +121,35 @@ void manager_free(Manager *m) {
while ((s = hashmap_first(m->seats)))
seat_free(s);
- hashmap_free(m->sessions);
- hashmap_free(m->users);
+ while ((i = hashmap_first(m->inhibitors)))
+ inhibitor_free(i);
+
+ while ((b = hashmap_first(m->buttons)))
+ button_free(b);
+
hashmap_free(m->devices);
hashmap_free(m->seats);
- hashmap_free(m->cgroups);
- hashmap_free(m->fifo_fds);
+ hashmap_free(m->sessions);
+ hashmap_free(m->users);
+ hashmap_free(m->inhibitors);
+ hashmap_free(m->buttons);
+
+ hashmap_free(m->user_cgroups);
+ hashmap_free(m->session_cgroups);
+
+ hashmap_free(m->session_fds);
+ hashmap_free(m->inhibitor_fds);
+ hashmap_free(m->button_fds);
if (m->console_active_fd >= 0)
close_nointr_nofail(m->console_active_fd);
if (m->udev_seat_monitor)
udev_monitor_unref(m->udev_seat_monitor);
-
if (m->udev_vcsa_monitor)
udev_monitor_unref(m->udev_vcsa_monitor);
+ if (m->udev_button_monitor)
+ udev_monitor_unref(m->udev_button_monitor);
if (m->udev)
udev_unref(m->udev);
@@ -246,7 +279,7 @@ int manager_add_user_by_name(Manager *m, const char *name, User **_user) {
assert(m);
assert(name);
- r = get_user_creds(&name, &uid, &gid, NULL);
+ r = get_user_creds(&name, &uid, &gid, NULL, NULL);
if (r < 0)
return r;
@@ -266,6 +299,54 @@ int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) {
return manager_add_user(m, uid, p->pw_gid, p->pw_name, _user);
}
+int manager_add_inhibitor(Manager *m, const char* id, Inhibitor **_inhibitor) {
+ Inhibitor *i;
+
+ assert(m);
+ assert(id);
+
+ i = hashmap_get(m->inhibitors, id);
+ if (i) {
+ if (_inhibitor)
+ *_inhibitor = i;
+
+ return 0;
+ }
+
+ i = inhibitor_new(m, id);
+ if (!i)
+ return -ENOMEM;
+
+ if (_inhibitor)
+ *_inhibitor = i;
+
+ return 0;
+}
+
+int manager_add_button(Manager *m, const char *name, Button **_button) {
+ Button *b;
+
+ assert(m);
+ assert(name);
+
+ b = hashmap_get(m->buttons, name);
+ if (b) {
+ if (_button)
+ *_button = b;
+
+ return 0;
+ }
+
+ b = button_new(m, name);
+ if (!b)
+ return -ENOMEM;
+
+ if (_button)
+ *_button = b;
+
+ return 0;
+}
+
int manager_process_seat_device(Manager *m, struct udev_device *d) {
Device *device;
int r;
@@ -313,6 +394,39 @@ int manager_process_seat_device(Manager *m, struct udev_device *d) {
return 0;
}
+int manager_process_button_device(Manager *m, struct udev_device *d) {
+ Button *b;
+
+ int r;
+
+ assert(m);
+
+ if (streq_ptr(udev_device_get_action(d), "remove")) {
+
+ b = hashmap_get(m->buttons, udev_device_get_sysname(d));
+ if (!b)
+ return 0;
+
+ button_free(b);
+
+ } else {
+ const char *sn;
+
+ r = manager_add_button(m, udev_device_get_sysname(d), &b);
+ if (r < 0)
+ return r;
+
+ sn = udev_device_get_property_value(d, "ID_SEAT");
+ if (isempty(sn))
+ sn = "seat0";
+
+ button_set_seat(b, sn);
+ button_open(b);
+ }
+
+ return 0;
+}
+
int manager_enumerate_devices(Manager *m) {
struct udev_list_entry *item = NULL, *first = NULL;
struct udev_enumerate *e;
@@ -366,6 +480,63 @@ finish:
return r;
}
+int manager_enumerate_buttons(Manager *m) {
+ struct udev_list_entry *item = NULL, *first = NULL;
+ struct udev_enumerate *e;
+ int r;
+
+ assert(m);
+
+ /* Loads buttons from udev */
+
+ if (m->handle_power_key == HANDLE_OFF &&
+ m->handle_sleep_key == HANDLE_OFF &&
+ m->handle_lid_switch == HANDLE_OFF)
+ return 0;
+
+ e = udev_enumerate_new(m->udev);
+ if (!e) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ r = udev_enumerate_add_match_subsystem(e, "input");
+ if (r < 0)
+ goto finish;
+
+ r = udev_enumerate_add_match_tag(e, "power-switch");
+ if (r < 0)
+ goto finish;
+
+ r = udev_enumerate_scan_devices(e);
+ if (r < 0)
+ goto finish;
+
+ first = udev_enumerate_get_list_entry(e);
+ udev_list_entry_foreach(item, first) {
+ struct udev_device *d;
+ int k;
+
+ d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
+ if (!d) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ k = manager_process_button_device(m, d);
+ udev_device_unref(d);
+
+ if (k < 0)
+ r = k;
+ }
+
+finish:
+ if (e)
+ udev_enumerate_unref(e);
+
+ return r;
+}
+
int manager_enumerate_seats(Manager *m) {
DIR *d;
struct dirent *de;
@@ -410,10 +581,9 @@ int manager_enumerate_seats(Manager *m) {
}
static int manager_enumerate_users_from_cgroup(Manager *m) {
- int r = 0;
+ int r = 0, k;
char *name;
DIR *d;
- int k;
r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_path, &d);
if (r < 0) {
@@ -639,6 +809,46 @@ int manager_enumerate_sessions(Manager *m) {
return r;
}
+int manager_enumerate_inhibitors(Manager *m) {
+ DIR *d;
+ struct dirent *de;
+ int r = 0;
+
+ assert(m);
+
+ d = opendir("/run/systemd/inhibit");
+ if (!d) {
+ if (errno == ENOENT)
+ return 0;
+
+ log_error("Failed to open /run/systemd/inhibit: %m");
+ return -errno;
+ }
+
+ while ((de = readdir(d))) {
+ int k;
+ Inhibitor *i;
+
+ if (!dirent_is_file(de))
+ continue;
+
+ k = manager_add_inhibitor(m, de->d_name, &i);
+ if (k < 0) {
+ log_notice("Couldn't add inhibitor %s: %s", de->d_name, strerror(-k));
+ r = k;
+ continue;
+ }
+
+ k = inhibitor_load(i);
+ if (k < 0)
+ r = k;
+ }
+
+ closedir(d);
+
+ return r;
+}
+
int manager_dispatch_seat_udev(Manager *m) {
struct udev_device *d;
int r;
@@ -679,6 +889,22 @@ int manager_dispatch_vcsa_udev(Manager *m) {
return r;
}
+int manager_dispatch_button_udev(Manager *m) {
+ struct udev_device *d;
+ int r;
+
+ assert(m);
+
+ d = udev_monitor_receive_device(m->udev_button_monitor);
+ if (!d)
+ return -ENOMEM;
+
+ r = manager_process_button_device(m, d);
+ udev_device_unref(d);
+
+ return r;
+}
+
int manager_dispatch_console(Manager *m) {
assert(m);
@@ -779,47 +1005,152 @@ finish:
return r;
}
-void manager_cgroup_notify_empty(Manager *m, const char *cgroup) {
+int manager_get_session_by_cgroup(Manager *m, const char *cgroup, Session **session) {
Session *s;
char *p;
assert(m);
assert(cgroup);
+ assert(session);
+
+ s = hashmap_get(m->session_cgroups, cgroup);
+ if (s) {
+ *session = s;
+ return 1;
+ }
p = strdup(cgroup);
if (!p) {
log_error("Out of memory.");
- return;
+ return -ENOMEM;
}
for (;;) {
char *e;
- if (isempty(p) || streq(p, "/"))
- break;
+ e = strrchr(p, '/');
+ if (!e || e == p) {
+ free(p);
+ *session = NULL;
+ return 0;
+ }
- s = hashmap_get(m->cgroups, p);
- if (s)
- session_add_to_gc_queue(s);
+ *e = 0;
+
+ s = hashmap_get(m->session_cgroups, p);
+ if (s) {
+ free(p);
+ *session = s;
+ return 1;
+ }
+ }
+}
+
+int manager_get_user_by_cgroup(Manager *m, const char *cgroup, User **user) {
+ User *u;
+ char *p;
+
+ assert(m);
+ assert(cgroup);
+ assert(user);
+
+ u = hashmap_get(m->user_cgroups, cgroup);
+ if (u) {
+ *user = u;
+ return 1;
+ }
+
+ p = strdup(cgroup);
+ if (!p) {
+ log_error("Out of memory.");
+ return -ENOMEM;
+ }
+
+ for (;;) {
+ char *e;
+
+ e = strrchr(p, '/');
+ if (!e || e == p) {
+ free(p);
+ *user = NULL;
+ return 0;
+ }
- assert_se(e = strrchr(p, '/'));
*e = 0;
+
+ u = hashmap_get(m->user_cgroups, p);
+ if (u) {
+ free(p);
+ *user = u;
+ return 1;
+ }
}
+}
+
+int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) {
+ char *p;
+ int r;
+
+ assert(m);
+ assert(pid >= 1);
+ assert(session);
+
+ r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &p);
+ if (r < 0)
+ return r;
+ r = manager_get_session_by_cgroup(m, p, session);
free(p);
+
+ return r;
+}
+
+void manager_cgroup_notify_empty(Manager *m, const char *cgroup) {
+ Session *s;
+ User *u;
+ int r;
+
+ r = manager_get_session_by_cgroup(m, cgroup, &s);
+ if (r > 0)
+ session_add_to_gc_queue(s);
+
+ r = manager_get_user_by_cgroup(m, cgroup, &u);
+ if (r > 0)
+ user_add_to_gc_queue(u);
}
-static void manager_pipe_notify_eof(Manager *m, int fd) {
+static void manager_dispatch_other(Manager *m, int fd) {
Session *s;
+ Inhibitor *i;
+ Button *b;
assert_se(m);
assert_se(fd >= 0);
- assert_se(s = hashmap_get(m->fifo_fds, INT_TO_PTR(fd + 1)));
- assert(s->fifo_fd == fd);
- session_remove_fifo(s);
+ s = hashmap_get(m->session_fds, INT_TO_PTR(fd + 1));
+ if (s) {
+ assert(s->fifo_fd == fd);
+ session_remove_fifo(s);
+ session_stop(s);
+ return;
+ }
- session_stop(s);
+ i = hashmap_get(m->inhibitor_fds, INT_TO_PTR(fd + 1));
+ if (i) {
+ assert(i->fifo_fd == fd);
+ inhibitor_stop(i);
+ inhibitor_free(i);
+ return;
+ }
+
+ b = hashmap_get(m->button_fds, INT_TO_PTR(fd + 1));
+ if (b) {
+ assert(b->fd == fd);
+ button_process(b);
+ return;
+ }
+
+ assert_not_reached("Got event for unknown fd");
}
static int manager_connect_bus(Manager *m) {
@@ -903,11 +1234,19 @@ static int manager_connect_console(Manager *m) {
assert(m);
assert(m->console_active_fd < 0);
+ /* On certain architectures (S390 and Xen, and containers),
+ /dev/tty0 does not exist, so don't fail if we can't open
+ it. */
+ if (access("/dev/tty0", F_OK) < 0) {
+ m->console_active_fd = -1;
+ return 0;
+ }
+
m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);
if (m->console_active_fd < 0) {
- /* On certain architectures (S390 and Xen), /dev/tty0
- does not exist, so don't fail if we can't open it.*/
+ /* On some systems the device node /dev/tty0 may exist
+ * even though /sys/class/tty/tty0 does not. */
if (errno == ENOENT)
return 0;
@@ -932,6 +1271,7 @@ static int manager_connect_udev(Manager *m) {
assert(m);
assert(!m->udev_seat_monitor);
assert(!m->udev_vcsa_monitor);
+ assert(!m->udev_button_monitor);
m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
if (!m->udev_seat_monitor)
@@ -954,34 +1294,62 @@ static int manager_connect_udev(Manager *m) {
zero(ev);
ev.events = EPOLLIN;
ev.data.u32 = FD_SEAT_UDEV;
-
- /* Don't bother watching VCSA devices, if nobody cares */
- if (m->n_autovts <= 0 || m->console_active_fd < 0)
- return 0;
-
if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_seat_fd, &ev) < 0)
return -errno;
- m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
- if (!m->udev_vcsa_monitor)
- return -ENOMEM;
+ /* Don't watch keys if nobody cares */
+ if (m->handle_power_key != HANDLE_OFF ||
+ m->handle_sleep_key != HANDLE_OFF ||
+ m->handle_lid_switch != HANDLE_OFF) {
- r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
- if (r < 0)
- return r;
+ m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
+ if (!m->udev_button_monitor)
+ return -ENOMEM;
- r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
- if (r < 0)
- return r;
+ r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
+ if (r < 0)
+ return r;
- m->udev_vcsa_fd = udev_monitor_get_fd(m->udev_vcsa_monitor);
+ r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
+ if (r < 0)
+ return r;
- zero(ev);
- ev.events = EPOLLIN;
- ev.data.u32 = FD_VCSA_UDEV;
+ r = udev_monitor_enable_receiving(m->udev_button_monitor);
+ if (r < 0)
+ return r;
- if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_vcsa_fd, &ev) < 0)
- return -errno;
+ m->udev_button_fd = udev_monitor_get_fd(m->udev_button_monitor);
+
+ zero(ev);
+ ev.events = EPOLLIN;
+ ev.data.u32 = FD_BUTTON_UDEV;
+ if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_button_fd, &ev) < 0)
+ return -errno;
+ }
+
+ /* Don't bother watching VCSA devices, if nobody cares */
+ if (m->n_autovts > 0 && m->console_active_fd >= 0) {
+
+ m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
+ if (!m->udev_vcsa_monitor)
+ return -ENOMEM;
+
+ r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
+ if (r < 0)
+ return r;
+
+ r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
+ if (r < 0)
+ return r;
+
+ m->udev_vcsa_fd = udev_monitor_get_fd(m->udev_vcsa_monitor);
+
+ zero(ev);
+ ev.events = EPOLLIN;
+ ev.data.u32 = FD_VCSA_UDEV;
+ if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_vcsa_fd, &ev) < 0)
+ return -errno;
+ }
return 0;
}
@@ -1026,12 +1394,14 @@ void manager_gc(Manager *m, bool drop_not_started) {
int manager_get_idle_hint(Manager *m, dual_timestamp *t) {
Session *s;
- bool idle_hint = true;
+ bool idle_hint;
dual_timestamp ts = { 0, 0 };
Iterator i;
assert(m);
+ idle_hint = !manager_is_inhibited(m, INHIBIT_IDLE, INHIBIT_BLOCK, t);
+
HASHMAP_FOREACH(s, m->sessions, i) {
dual_timestamp k;
int ih;
@@ -1066,11 +1436,15 @@ int manager_startup(Manager *m) {
Seat *seat;
Session *session;
User *user;
+ Inhibitor *inhibitor;
Iterator i;
assert(m);
assert(m->epoll_fd <= 0);
+ cg_shorten_controllers(m->reset_controllers);
+ cg_shorten_controllers(m->controllers);
+
m->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
if (m->epoll_fd < 0)
return -errno;
@@ -1100,6 +1474,8 @@ int manager_startup(Manager *m) {
manager_enumerate_seats(m);
manager_enumerate_users(m);
manager_enumerate_sessions(m);
+ manager_enumerate_inhibitors(m);
+ manager_enumerate_buttons(m);
/* Remove stale objects before we start them */
manager_gc(m, false);
@@ -1114,6 +1490,9 @@ int manager_startup(Manager *m) {
HASHMAP_FOREACH(session, m->sessions, i)
session_start(session);
+ HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
+ inhibitor_start(inhibitor);
+
return 0;
}
@@ -1123,15 +1502,28 @@ int manager_run(Manager *m) {
for (;;) {
struct epoll_event event;
int n;
+ int msec = -1;
manager_gc(m, true);
+ if (manager_dispatch_delayed(m) > 0)
+ continue;
+
if (dbus_connection_dispatch(m->bus) != DBUS_DISPATCH_COMPLETE)
continue;
manager_gc(m, true);
- n = epoll_wait(m->epoll_fd, &event, 1, -1);
+ if (m->delayed_unit) {
+ usec_t x, y;
+
+ x = now(CLOCK_MONOTONIC);
+ y = m->delayed_timestamp + m->inhibit_delay_max;
+
+ msec = x >= y ? 0 : (int) ((y - x) / USEC_PER_MSEC);
+ }
+
+ n = epoll_wait(m->epoll_fd, &event, 1, msec);
if (n < 0) {
if (errno == EINTR || errno == EAGAIN)
continue;
@@ -1140,6 +1532,9 @@ int manager_run(Manager *m) {
return -errno;
}
+ if (n == 0)
+ continue;
+
switch (event.data.u32) {
case FD_SEAT_UDEV:
@@ -1150,6 +1545,10 @@ int manager_run(Manager *m) {
manager_dispatch_vcsa_udev(m);
break;
+ case FD_BUTTON_UDEV:
+ manager_dispatch_button_udev(m);
+ break;
+
case FD_CONSOLE:
manager_dispatch_console(m);
break;
@@ -1159,8 +1558,8 @@ int manager_run(Manager *m) {
break;
default:
- if (event.data.u32 >= FD_FIFO_BASE)
- manager_pipe_notify_eof(m, event.data.u32 - FD_FIFO_BASE);
+ if (event.data.u32 >= FD_OTHER_BASE)
+ manager_dispatch_other(m, event.data.u32 - FD_OTHER_BASE);
}
}
@@ -1174,7 +1573,7 @@ static int manager_parse_config_file(Manager *m) {
assert(m);
- fn = "/etc/systemd/systemd-logind.conf";
+ fn = "/etc/systemd/logind.conf";
f = fopen(fn, "re");
if (!f) {
if (errno == ENOENT)
@@ -1198,6 +1597,7 @@ int main(int argc, char *argv[]) {
int r;
log_set_target(LOG_TARGET_AUTO);
+ log_set_facility(LOG_AUTH);
log_parse_environment();
log_open();