diff options
Diffstat (limited to 'src/logind-util.c')
| -rw-r--r-- | src/logind-util.c | 940 |
1 files changed, 940 insertions, 0 deletions
diff --git a/src/logind-util.c b/src/logind-util.c new file mode 100644 index 00000000..40d811b4 --- /dev/null +++ b/src/logind-util.c @@ -0,0 +1,940 @@ +/* + * Copyright © 2013 David Herrmann + * + * Permission to use, copy, modify, distribute, and sell this software and + * its documentation for any purpose is hereby granted without fee, provided + * that the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of the copyright holders not be used in + * advertising or publicity pertaining to distribution of the software + * without specific, written prior permission. The copyright holders make + * no representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS + * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER + * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF + * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "config.h" + +#include <errno.h> +#include <dbus.h> +#include <fcntl.h> +#include <linux/vt.h> +#include <linux/kd.h> +#include <linux/major.h> +#include <signal.h> +#include <stdarg.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/ioctl.h> +#include <sys/signalfd.h> +#include <sys/stat.h> +#include <systemd/sd-login.h> +#include <unistd.h> + +#include "compositor.h" +#include "dbus.h" +#include "logind-util.h" + +#define DRM_MAJOR 226 + +#ifndef KDSKBMUTE +#define KDSKBMUTE 0x4B51 +#endif + +struct weston_logind { + struct weston_compositor *compositor; + char *seat; + char *sid; + unsigned int vtnr; + int vt; + int kb_mode; + int sfd; + struct wl_event_source *sfd_source; + + DBusConnection *dbus; + struct wl_event_source *dbus_ctx; + char *spath; + DBusPendingCall *pending_active; +}; + +static int +weston_logind_take_device(struct weston_logind *wl, uint32_t major, + uint32_t minor, bool *paused_out) +{ + DBusMessage *m, *reply; + bool b; + int r, fd; + dbus_bool_t paused; + + m = dbus_message_new_method_call("org.freedesktop.login1", + wl->spath, + "org.freedesktop.login1.Session", + "TakeDevice"); + if (!m) + return -ENOMEM; + + b = dbus_message_append_args(m, + DBUS_TYPE_UINT32, &major, + DBUS_TYPE_UINT32, &minor, + DBUS_TYPE_INVALID); + if (!b) { + r = -ENOMEM; + goto err_unref; + } + + reply = dbus_connection_send_with_reply_and_block(wl->dbus, m, + -1, NULL); + if (!reply) { + r = -ENODEV; + goto err_unref; + } + + b = dbus_message_get_args(reply, NULL, + DBUS_TYPE_UNIX_FD, &fd, + DBUS_TYPE_BOOLEAN, &paused, + DBUS_TYPE_INVALID); + if (!b) { + r = -ENODEV; + goto err_reply; + } + + r = fd; + if (paused_out) + *paused_out = paused; + +err_reply: + dbus_message_unref(reply); +err_unref: + dbus_message_unref(m); + return r; +} + +static void +weston_logind_release_device(struct weston_logind *wl, uint32_t major, + uint32_t minor) +{ + DBusMessage *m; + bool b; + + m = dbus_message_new_method_call("org.freedesktop.login1", + wl->spath, + "org.freedesktop.login1.Session", + "ReleaseDevice"); + if (m) { + b = dbus_message_append_args(m, + DBUS_TYPE_UINT32, &major, + DBUS_TYPE_UINT32, &minor, + DBUS_TYPE_INVALID); + if (b) + dbus_connection_send(wl->dbus, m, NULL); + dbus_message_unref(m); + } +} + +static void +weston_logind_pause_device_complete(struct weston_logind *wl, uint32_t major, + uint32_t minor) +{ + DBusMessage *m; + bool b; + + m = dbus_message_new_method_call("org.freedesktop.login1", + wl->spath, + "org.freedesktop.login1.Session", + "PauseDeviceComplete"); + if (m) { + b = dbus_message_append_args(m, + DBUS_TYPE_UINT32, &major, + DBUS_TYPE_UINT32, &minor, + DBUS_TYPE_INVALID); + if (b) + dbus_connection_send(wl->dbus, m, NULL); + dbus_message_unref(m); + } +} + +WL_EXPORT int +weston_logind_open(struct weston_logind *wl, const char *path, + int flags) +{ + struct stat st; + int fl, r, fd; + + r = stat(path, &st); + if (r < 0) + return -1; + if (!S_ISCHR(st.st_mode)) { + errno = ENODEV; + return -1; + } + + fd = weston_logind_take_device(wl, major(st.st_rdev), + minor(st.st_rdev), NULL); + if (fd < 0) + return fd; + + /* Compared to weston_launcher_open() we cannot specify the open-mode + * directly. Instead, logind passes us an fd with sane default modes. + * For DRM and evdev this means O_RDWR | O_CLOEXEC. If we want + * something else, we need to change it afterwards. We currently + * only support dropping FD_CLOEXEC and setting O_NONBLOCK. Changing + * access-modes is not possible so accept whatever logind passes us. */ + + fl = fcntl(fd, F_GETFL); + if (fl < 0) { + r = -errno; + goto err_close; + } + + if (flags & O_NONBLOCK) + fl |= O_NONBLOCK; + + r = fcntl(fd, F_SETFL, fl); + if (r < 0) { + r = -errno; + goto err_close; + } + + fl = fcntl(fd, F_GETFD); + if (fl < 0) { + r = -errno; + goto err_close; + } + + if (!(flags & O_CLOEXEC)) + fl &= ~FD_CLOEXEC; + + r = fcntl(fd, F_SETFD, fl); + if (r < 0) { + r = -errno; + goto err_close; + } + + return fd; + +err_close: + close(fd); + weston_logind_release_device(wl, major(st.st_rdev), + minor(st.st_rdev)); + errno = -r; + return -1; +} + +WL_EXPORT void +weston_logind_close(struct weston_logind *wl, int fd) +{ + struct stat st; + int r; + + r = fstat(fd, &st); + if (r < 0) { + weston_log("logind: cannot fstat fd: %m\n"); + return; + } + + if (!S_ISCHR(st.st_mode)) { + weston_log("logind: invalid device passed\n"); + return; + } + + weston_logind_release_device(wl, major(st.st_rdev), + minor(st.st_rdev)); +} + +WL_EXPORT void +weston_logind_restore(struct weston_logind *wl) +{ + struct vt_mode mode = { 0 }; + + ioctl(wl->vt, KDSETMODE, KD_TEXT); + ioctl(wl->vt, KDSKBMUTE, 0); + ioctl(wl->vt, KDSKBMODE, wl->kb_mode); + mode.mode = VT_AUTO; + ioctl(wl->vt, VT_SETMODE, &mode); +} + +WL_EXPORT int +weston_logind_activate_vt(struct weston_logind *wl, int vt) +{ + int r; + + r = ioctl(wl->vt, VT_ACTIVATE, vt); + if (r < 0) + return -1; + + return 0; +} + +static void +weston_logind_set_active(struct weston_logind *wl, bool active) +{ + if (!wl->compositor->session_active == !active) + return; + + wl->compositor->session_active = active; + + wl_signal_emit(&wl->compositor->session_signal, + wl->compositor); +} + +static void +get_active_cb(DBusPendingCall *pending, void *data) +{ + struct weston_logind *wl = data; + DBusMessage *m; + DBusMessageIter iter, sub; + int type; + dbus_bool_t b; + + dbus_pending_call_unref(wl->pending_active); + wl->pending_active = NULL; + + m = dbus_pending_call_steal_reply(pending); + if (!m) + return; + + type = dbus_message_get_type(m); + if (type != DBUS_MESSAGE_TYPE_METHOD_RETURN) + goto err_unref; + + if (!dbus_message_iter_init(m, &iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) + goto err_unref; + + dbus_message_iter_recurse(&iter, &sub); + + if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN) + goto err_unref; + + dbus_message_iter_get_basic(&sub, &b); + if (!b) + weston_logind_set_active(wl, false); + +err_unref: + dbus_message_unref(m); +} + +static void +weston_logind_get_active(struct weston_logind *wl) +{ + DBusPendingCall *pending; + DBusMessage *m; + bool b; + const char *iface, *name; + + m = dbus_message_new_method_call("org.freedesktop.login1", + wl->spath, + "org.freedesktop.DBus.Properties", + "Get"); + if (!m) + return; + + iface = "org.freedesktop.login1.Session"; + name = "Active"; + b = dbus_message_append_args(m, + DBUS_TYPE_STRING, &iface, + DBUS_TYPE_STRING, &name, + DBUS_TYPE_INVALID); + if (!b) + goto err_unref; + + b = dbus_connection_send_with_reply(wl->dbus, m, &pending, -1); + if (!b) + goto err_unref; + + b = dbus_pending_call_set_notify(pending, get_active_cb, wl, NULL); + if (!b) { + dbus_pending_call_cancel(pending); + dbus_pending_call_unref(pending); + goto err_unref; + } + + if (wl->pending_active) { + dbus_pending_call_cancel(wl->pending_active); + dbus_pending_call_unref(wl->pending_active); + } + wl->pending_active = pending; + return; + +err_unref: + dbus_message_unref(m); +} + +static void +disconnected_dbus(struct weston_logind *wl) +{ + weston_log("logind: dbus connection lost, exiting..\n"); + weston_logind_restore(wl); + exit(-1); +} + +static void +session_removed(struct weston_logind *wl, DBusMessage *m) +{ + const char *name, *obj; + bool r; + + r = dbus_message_get_args(m, NULL, + DBUS_TYPE_STRING, &name, + DBUS_TYPE_OBJECT_PATH, &obj, + DBUS_TYPE_INVALID); + if (!r) { + weston_log("logind: cannot parse SessionRemoved dbus signal\n"); + return; + } + + if (!strcmp(name, wl->sid)) { + weston_log("logind: our session got closed, exiting..\n"); + weston_logind_restore(wl); + exit(-1); + } +} + +static void +property_changed(struct weston_logind *wl, DBusMessage *m) +{ + DBusMessageIter iter, sub, entry; + const char *interface, *name; + dbus_bool_t b; + + if (!dbus_message_iter_init(m, &iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) + goto error; + + dbus_message_iter_get_basic(&iter, &interface); + + if (!dbus_message_iter_next(&iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) + goto error; + + dbus_message_iter_recurse(&iter, &sub); + + while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_DICT_ENTRY) { + dbus_message_iter_recurse(&sub, &entry); + + if (dbus_message_iter_get_arg_type(&entry) != DBUS_TYPE_STRING) + goto error; + + dbus_message_iter_get_basic(&entry, &name); + if (!dbus_message_iter_next(&entry)) + goto error; + + if (!strcmp(name, "Active")) { + if (dbus_message_iter_get_arg_type(&entry) == DBUS_TYPE_BOOLEAN) { + dbus_message_iter_get_basic(&entry, &b); + if (!b) + weston_logind_set_active(wl, false); + return; + } + } + + dbus_message_iter_next(&sub); + } + + if (!dbus_message_iter_next(&iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) + goto error; + + dbus_message_iter_recurse(&iter, &sub); + + while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING) { + dbus_message_iter_get_basic(&sub, &name); + + if (!strcmp(name, "Active")) { + weston_logind_get_active(wl); + return; + } + + dbus_message_iter_next(&sub); + } + + return; + +error: + weston_log("logind: cannot parse PropertiesChanged dbus signal\n"); +} + +static void +device_paused(struct weston_logind *wl, DBusMessage *m) +{ + bool r; + const char *type; + uint32_t major, minor; + + r = dbus_message_get_args(m, NULL, + DBUS_TYPE_UINT32, &major, + DBUS_TYPE_UINT32, &minor, + DBUS_TYPE_STRING, &type, + DBUS_TYPE_INVALID); + if (!r) { + weston_log("logind: cannot parse PauseDevice dbus signal\n"); + return; + } + + /* "pause" means synchronous pausing. Acknowledge it unconditionally + * as we support asynchronous device shutdowns, anyway. + * "force" means asynchronous pausing. + * "gone" means the device is gone. We handle it the same as "force" as + * a following udev event will be caught, too. + * + * If it's our main DRM device, tell the compositor to go asleep. */ + + if (!strcmp(type, "pause")) + weston_logind_pause_device_complete(wl, major, minor); + + if (major == DRM_MAJOR) + weston_logind_set_active(wl, false); +} + +static void +device_resumed(struct weston_logind *wl, DBusMessage *m) +{ + bool r; + uint32_t major; + + r = dbus_message_get_args(m, NULL, + DBUS_TYPE_UINT32, &major, + /*DBUS_TYPE_UINT32, &minor, + DBUS_TYPE_UNIX_FD, &fd,*/ + DBUS_TYPE_INVALID); + if (!r) { + weston_log("logind: cannot parse ResumeDevice dbus signal\n"); + return; + } + + /* DeviceResumed messages provide us a new file-descriptor for + * resumed devices. For DRM devices it's the same as before, for evdev + * devices it's a new open-file. As we reopen evdev devices, anyway, + * there is no need for us to handle this event for evdev. For DRM, we + * notify the compositor to wake up. */ + + if (major == DRM_MAJOR) + weston_logind_set_active(wl, true); +} + +static DBusHandlerResult +filter_dbus(DBusConnection *c, DBusMessage *m, void *data) +{ + struct weston_logind *wl = data; + + if (dbus_message_is_signal(m, DBUS_INTERFACE_LOCAL, "Disconnected")) { + disconnected_dbus(wl); + } else if (dbus_message_is_signal(m, "org.freedesktop.login1.Manager", + "SessionRemoved")) { + session_removed(wl, m); + } else if (dbus_message_is_signal(m, "org.freedesktop.DBus.Properties", + "PropertiesChanged")) { + property_changed(wl, m); + } else if (dbus_message_is_signal(m, "org.freedesktop.login1.Session", + "PauseDevice")) { + device_paused(wl, m); + } else if (dbus_message_is_signal(m, "org.freedesktop.login1.Session", + "ResumeDevice")) { + device_resumed(wl, m); + } + + return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; +} + +static int +weston_logind_setup_dbus(struct weston_logind *wl) +{ + bool b; + int r; + + r = asprintf(&wl->spath, "/org/freedesktop/login1/session/%s", + wl->sid); + if (r < 0) + return -ENOMEM; + + b = dbus_connection_add_filter(wl->dbus, filter_dbus, wl, NULL); + if (!b) { + weston_log("logind: cannot add dbus filter\n"); + r = -ENOMEM; + goto err_spath; + } + + r = weston_dbus_add_match_signal(wl->dbus, + "org.freedesktop.login1", + "org.freedesktop.login1.Manager", + "SessionRemoved", + "/org/freedesktop/login1"); + if (r < 0) { + weston_log("logind: cannot add dbus match\n"); + goto err_spath; + } + + r = weston_dbus_add_match_signal(wl->dbus, + "org.freedesktop.login1", + "org.freedesktop.login1.Session", + "PauseDevice", + wl->spath); + if (r < 0) { + weston_log("logind: cannot add dbus match\n"); + goto err_spath; + } + + r = weston_dbus_add_match_signal(wl->dbus, + "org.freedesktop.login1", + "org.freedesktop.login1.Session", + "ResumeDevice", + wl->spath); + if (r < 0) { + weston_log("logind: cannot add dbus match\n"); + goto err_spath; + } + + r = weston_dbus_add_match_signal(wl->dbus, + "org.freedesktop.login1", + "org.freedesktop.DBus.Properties", + "PropertiesChanged", + wl->spath); + if (r < 0) { + weston_log("logind: cannot add dbus match\n"); + goto err_spath; + } + + return 0; + +err_spath: + /* don't remove any dbus-match as the connection is closed, anyway */ + free(wl->spath); + return r; +} + +static void +weston_logind_destroy_dbus(struct weston_logind *wl) +{ + /* don't remove any dbus-match as the connection is closed, anyway */ + free(wl->spath); +} + +static int +weston_logind_take_control(struct weston_logind *wl) +{ + DBusError err; + DBusMessage *m, *reply; + dbus_bool_t force; + bool b; + int r; + + dbus_error_init(&err); + + m = dbus_message_new_method_call("org.freedesktop.login1", + wl->spath, + "org.freedesktop.login1.Session", + "TakeControl"); + if (!m) + return -ENOMEM; + + force = false; + b = dbus_message_append_args(m, + DBUS_TYPE_BOOLEAN, &force, + DBUS_TYPE_INVALID); + if (!b) { + r = -ENOMEM; + goto err_unref; + } + + reply = dbus_connection_send_with_reply_and_block(wl->dbus, + m, -1, &err); + if (!reply) { + if (dbus_error_has_name(&err, DBUS_ERROR_UNKNOWN_METHOD)) + weston_log("logind: old systemd version detected\n"); + else + weston_log("logind: cannot take control over session %s\n", wl->sid); + + dbus_error_free(&err); + r = -EIO; + goto err_unref; + } + + dbus_message_unref(reply); + dbus_message_unref(m); + return 0; + +err_unref: + dbus_message_unref(m); + return r; +} + +static void +weston_logind_release_control(struct weston_logind *wl) +{ + DBusMessage *m; + + m = dbus_message_new_method_call("org.freedesktop.login1", + wl->spath, + "org.freedesktop.login1.Session", + "ReleaseControl"); + if (m) { + dbus_connection_send(wl->dbus, m, NULL); + dbus_message_unref(m); + } +} + +static int +signal_event(int fd, uint32_t mask, void *data) +{ + struct weston_logind *wl = data; + struct signalfd_siginfo sig; + + if (read(fd, &sig, sizeof sig) != sizeof sig) { + weston_log("logind: cannot read signalfd: %m\n"); + return 0; + } + + switch (sig.ssi_signo) { + case SIGUSR1: + ioctl(wl->vt, VT_RELDISP, 1); + break; + case SIGUSR2: + ioctl(wl->vt, VT_RELDISP, VT_ACKACQ); + break; + } + + return 0; +} + +static int +weston_logind_setup_vt(struct weston_logind *wl) +{ + struct stat st; + char buf[64]; + struct vt_mode mode = { 0 }; + int r; + sigset_t mask; + struct wl_event_loop *loop; + + snprintf(buf, sizeof(buf), "/dev/tty%d", wl->vtnr); + buf[sizeof(buf) - 1] = 0; + + wl->vt = open(buf, O_RDWR|O_CLOEXEC|O_NONBLOCK); + + if (wl->vt < 0) { + r = -errno; + weston_log("logind: cannot open VT %s: %m\n", buf); + return r; + } + + if (fstat(wl->vt, &st) == -1 || + major(st.st_rdev) != TTY_MAJOR || minor(st.st_rdev) <= 0 || + minor(st.st_rdev) >= 64) { + r = -EINVAL; + weston_log("logind: TTY %s is no virtual terminal\n", buf); + goto err_close; + } + + /*r = setsid(); + if (r < 0 && errno != EPERM) { + r = -errno; + weston_log("logind: setsid() failed: %m\n"); + goto err_close; + } + + r = ioctl(wl->vt, TIOCSCTTY, 0); + if (r < 0) + weston_log("logind: VT %s already in use\n", buf);*/ + + if (ioctl(wl->vt, KDGKBMODE, &wl->kb_mode) < 0) { + weston_log("logind: cannot read keyboard mode on %s: %m\n", + buf); + wl->kb_mode = K_UNICODE; + } else if (wl->kb_mode == K_OFF) { + wl->kb_mode = K_UNICODE; + } + + if (ioctl(wl->vt, KDSKBMUTE, 1) < 0 && + ioctl(wl->vt, KDSKBMODE, K_OFF) < 0) { + r = -errno; + weston_log("logind: cannot set K_OFF KB-mode on %s: %m\n", + buf); + goto err_close; + } + + if (ioctl(wl->vt, KDSETMODE, KD_GRAPHICS) < 0) { + r = -errno; + weston_log("logind: cannot set KD_GRAPHICS mode on %s: %m\n", + buf); + goto err_kbmode; + } + + sigemptyset(&mask); + sigaddset(&mask, SIGUSR1); + sigaddset(&mask, SIGUSR2); + sigprocmask(SIG_BLOCK, &mask, NULL); + + wl->sfd = signalfd(-1, &mask, SFD_NONBLOCK | SFD_CLOEXEC); + if (wl->sfd < 0) { + r = -errno; + weston_log("logind: cannot create signalfd: %m\n"); + goto err_mode; + } + + loop = wl_display_get_event_loop(wl->compositor->wl_display); + wl->sfd_source = wl_event_loop_add_fd(loop, wl->sfd, + WL_EVENT_READABLE, + signal_event, wl); + if (!wl->sfd_source) { + r = -errno; + weston_log("logind: cannot create signalfd source: %m\n"); + goto err_sfd; + } + + mode.mode = VT_PROCESS; + mode.relsig = SIGUSR1; + mode.acqsig = SIGUSR2; + if (ioctl(wl->vt, VT_SETMODE, &mode) < 0) { + r = -errno; + weston_log("logind: cannot take over VT: %m\n"); + goto err_sfd_source; + } + + weston_log("logind: using VT %s\n", buf); + return 0; + +err_sfd_source: + wl_event_source_remove(wl->sfd_source); +err_sfd: + close(wl->sfd); +err_mode: + ioctl(wl->vt, KDSETMODE, KD_TEXT); +err_kbmode: + ioctl(wl->vt, KDSKBMUTE, 0); + ioctl(wl->vt, KDSKBMODE, wl->kb_mode); +err_close: + close(wl->vt); + return r; +} + +static void +weston_logind_destroy_vt(struct weston_logind *wl) +{ + weston_logind_restore(wl); + wl_event_source_remove(wl->sfd_source); + close(wl->sfd); + close(wl->vt); +} + +WL_EXPORT int +weston_logind_connect(struct weston_logind **out, + struct weston_compositor *compositor, + const char *seat_id, int tty) +{ + struct weston_logind *wl; + struct wl_event_loop *loop; + char *t; + int r; + + wl = calloc(1, sizeof(*wl)); + if (!wl) { + r = -ENOMEM; + goto err_out; + } + + wl->compositor = compositor; + + wl->seat = strdup(seat_id); + if (!wl->seat) { + r = -ENOMEM; + goto err_wl; + } + + r = sd_pid_get_session(getpid(), &wl->sid); + if (r < 0) { + weston_log("logind: not running in a systemd session\n"); + goto err_seat; + } + + t = NULL; + r = sd_session_get_seat(wl->sid, &t); + if (r < 0) { + weston_log("logind: failed to get session seat\n"); + free(t); + goto err_session; + } else if (strcmp(seat_id, t)) { + weston_log("logind: weston's seat '%s' differs from session-seat '%s'\n", + seat_id, t); + r = -EINVAL; + free(t); + goto err_session; + } + free(t); + + r = weston_sd_session_get_vt(wl->sid, &wl->vtnr); + if (r < 0) { + weston_log("logind: session not running on a VT\n"); + goto err_session; + } else if (tty > 0 && wl->vtnr != (unsigned int )tty) { + weston_log("logind: requested VT --tty=%d differs from real session VT %u\n", + tty, wl->vtnr); + r = -EINVAL; + goto err_session; + } + + loop = wl_display_get_event_loop(compositor->wl_display); + r = weston_dbus_open(loop, DBUS_BUS_SYSTEM, &wl->dbus, &wl->dbus_ctx); + if (r < 0) { + weston_log("logind: cannot connect to system dbus\n"); + goto err_session; + } + + r = weston_logind_setup_dbus(wl); + if (r < 0) + goto err_dbus; + + r = weston_logind_take_control(wl); + if (r < 0) + goto err_dbus_cleanup; + + r = weston_logind_setup_vt(wl); + if (r < 0) + goto err_control; + + weston_log("logind: session control granted\n"); + *out = wl; + return 0; + +err_control: + weston_logind_release_control(wl); +err_dbus_cleanup: + weston_logind_destroy_dbus(wl); +err_dbus: + weston_dbus_close(wl->dbus, wl->dbus_ctx); +err_session: + free(wl->sid); +err_seat: + free(wl->seat); +err_wl: + free(wl); +err_out: + weston_log("logind: cannot setup systemd-logind helper (%d), using legacy fallback\n", r); + errno = -r; + return -1; +} + +WL_EXPORT void +weston_logind_destroy(struct weston_logind *wl) +{ + if (wl->pending_active) { + dbus_pending_call_cancel(wl->pending_active); + dbus_pending_call_unref(wl->pending_active); + } + + weston_logind_destroy_vt(wl); + weston_logind_release_control(wl); + weston_logind_destroy_dbus(wl); + weston_dbus_close(wl->dbus, wl->dbus_ctx); + free(wl->sid); + free(wl->seat); + free(wl); +} |