mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
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128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/* PipeWire
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*
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* Copyright © 2021 Pauli Virtanen
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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/*
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* Monitor systemd-logind events for changes in session/seat status, and keep session
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* manager up-to-date on whether the current session is active.
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <unistd.h>
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#include <systemd/sd-login.h>
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#include <spa/utils/result.h>
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#include <spa/utils/string.h>
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#include "pipewire/pipewire.h"
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#include "media-session.h"
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#define NAME "logind"
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struct impl {
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struct sm_media_session *session;
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struct spa_hook listener;
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struct pw_context *context;
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sd_login_monitor *monitor;
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struct spa_source source;
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};
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static void update_seat_active(struct impl *impl)
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{
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char *state;
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bool active;
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if (sd_uid_get_state(getuid(), &state) < 0)
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return;
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active = spa_streq(state, "active");
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free(state);
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sm_media_session_seat_active_changed(impl->session, active);
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}
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static void monitor_event(struct spa_source *source)
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{
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struct impl *impl = source->data;
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sd_login_monitor_flush(impl->monitor);
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update_seat_active(impl);
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}
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static void session_destroy(void *data)
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{
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struct impl *impl = data;
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spa_hook_remove(&impl->listener);
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if (impl->monitor) {
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struct pw_loop *main_loop = pw_context_get_main_loop(impl->context);
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pw_loop_remove_source(main_loop, &impl->source);
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sd_login_monitor_unref(impl->monitor);
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impl->monitor = NULL;
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}
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free(impl);
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}
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static const struct sm_media_session_events session_events = {
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SM_VERSION_MEDIA_SESSION_EVENTS,
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.destroy = session_destroy,
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};
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int sm_logind_start(struct sm_media_session *session)
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{
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struct impl *impl;
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struct pw_loop *main_loop;
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int res;
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impl = calloc(1, sizeof(struct impl));
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if (impl == NULL)
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return -errno;
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impl->session = session;
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impl->context = session->context;
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if ((res = sd_login_monitor_new(NULL, &impl->monitor)) < 0)
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goto fail;
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main_loop = pw_context_get_main_loop(impl->context);
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impl->source.data = impl;
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impl->source.fd = sd_login_monitor_get_fd(impl->monitor);
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impl->source.func = monitor_event;
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impl->source.mask = sd_login_monitor_get_events(impl->monitor);
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impl->source.rmask = 0;
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pw_loop_add_source(main_loop, &impl->source);
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sm_media_session_add_listener(impl->session, &impl->listener, &session_events, impl);
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update_seat_active(impl);
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return 0;
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fail:
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pw_log_error(NAME ": failed to start systemd logind monitor: %d (%s)", res, spa_strerror(res));
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free(impl);
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return res;
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}
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