Scott Anderson
8 years ago
parent
762ac7f4c0
commit
81998fdc98
@ -1,219 +0,0 @@
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#define _POSIX_C_SOURCE 200809L
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <systemd/sd-bus.h>
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#include <systemd/sd-login.h>
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#include <unistd.h>
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#include <sys/sysmacros.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "backend/drm/backend.h"
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#include "backend/drm/session.h"
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#include "common/log.h"
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int wlr_session_take_device(struct wlr_session *restrict session,
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const char *restrict path,
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bool *restrict paused_out)
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{
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int ret;
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int fd = -1;
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sd_bus_message *msg = NULL;
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sd_bus_error error = SD_BUS_ERROR_NULL;
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struct stat st;
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if (stat(path, &st) < 0) {
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wlr_log(L_ERROR, "Failed to stat '%s'", path);
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return -1;
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}
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ret = sd_bus_call_method(session->bus,
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"org.freedesktop.login1",
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session->path,
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"org.freedesktop.login1.Session",
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"TakeDevice",
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&error, &msg,
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"uu", major(st.st_rdev), minor(st.st_rdev));
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if (ret < 0) {
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wlr_log(L_ERROR, "Failed to take device '%s': %s", path, error.message);
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goto error;
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}
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int paused = 0;
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ret = sd_bus_message_read(msg, "hb", &fd, &paused);
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if (ret < 0) {
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wlr_log(L_ERROR, "Failed to parse DBus response for '%s': %s",
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path, strerror(-ret));
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goto error;
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}
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// The original fd seem to be closed when the message is freed
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// so we just clone it.
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fd = fcntl(fd, F_DUPFD_CLOEXEC, 0);
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if (fd == -1) {
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wlr_log(L_ERROR, "Failed to clone file descriptor for '%s': %s",
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path, strerror(errno));
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goto error;
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}
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if (paused_out)
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*paused_out = paused;
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error:
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sd_bus_error_free(&error);
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sd_bus_message_unref(msg);
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return fd;
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}
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void wlr_session_release_device(struct wlr_session *session, int fd)
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{
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int ret;
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sd_bus_message *msg = NULL;
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sd_bus_error error = SD_BUS_ERROR_NULL;
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struct stat st;
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if (fstat(fd, &st) < 0) {
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wlr_log(L_ERROR, "Failed to stat device '%d'", fd);
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return;
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}
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ret = sd_bus_call_method(session->bus,
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"org.freedesktop.login1",
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session->path,
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"org.freedesktop.login1.Session",
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"ReleaseDevice",
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&error, &msg,
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"uu", major(st.st_rdev), minor(st.st_rdev));
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if (ret < 0)
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wlr_log(L_ERROR, "Failed to release device '%d'", fd);
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sd_bus_error_free(&error);
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sd_bus_message_unref(msg);
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}
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static bool session_activate(struct wlr_session *session)
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{
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int ret;
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sd_bus_message *msg = NULL;
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sd_bus_error error = SD_BUS_ERROR_NULL;
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ret = sd_bus_call_method(session->bus,
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"org.freedesktop.login1",
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session->path,
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"org.freedesktop.login1.Session",
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"Activate",
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&error, &msg,
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"");
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if (ret < 0)
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wlr_log(L_ERROR, "Failed to activate session");
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sd_bus_error_free(&error);
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sd_bus_message_unref(msg);
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return ret >= 0;
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}
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static bool take_control(struct wlr_session *session)
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{
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int ret;
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sd_bus_message *msg = NULL;
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sd_bus_error error = SD_BUS_ERROR_NULL;
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ret = sd_bus_call_method(session->bus,
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"org.freedesktop.login1",
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session->path,
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"org.freedesktop.login1.Session",
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"TakeControl",
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&error, &msg,
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"b", false);
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if (ret < 0)
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wlr_log(L_ERROR, "Failed to take control of session");
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sd_bus_error_free(&error);
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sd_bus_message_unref(msg);
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return ret >= 0;
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}
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static void release_control(struct wlr_session *session)
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{
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int ret;
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sd_bus_message *msg = NULL;
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sd_bus_error error = SD_BUS_ERROR_NULL;
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ret = sd_bus_call_method(session->bus,
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"org.freedesktop.login1",
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session->path,
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"org.freedesktop.login1.Session",
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"ReleaseControl",
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&error, &msg,
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"");
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if (ret < 0)
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wlr_log(L_ERROR, "Failed to release control of session");
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sd_bus_error_free(&error);
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sd_bus_message_unref(msg);
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}
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void wlr_session_end(struct wlr_session *session)
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{
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release_control(session);
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sd_bus_unref(session->bus);
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free(session->id);
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free(session->path);
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free(session->seat);
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}
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bool wlr_session_start(struct wlr_session *session)
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{
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int ret;
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ret = sd_pid_get_session(getpid(), &session->id);
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if (ret < 0) {
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wlr_log(L_ERROR, "Failed to get session id: %s", strerror(-ret));
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goto error;
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}
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ret = sd_session_get_seat(session->id, &session->seat);
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if (ret < 0) {
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wlr_log(L_ERROR, "Failed to get seat id: %s", strerror(-ret));
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goto error;
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}
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// This could be done using asprintf, but I don't want to define _GNU_SOURCE
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const char *fmt = "/org/freedesktop/login1/session/%s";
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int len = snprintf(NULL, 0, fmt, session->id);
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session->path = malloc(len + 1);
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if (!session->path)
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goto error;
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sprintf(session->path, fmt, session->id);
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ret = sd_bus_default_system(&session->bus);
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if (ret < 0) {
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wlr_log(L_ERROR, "Failed to open DBus connection: %s", strerror(-ret));
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goto error;
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}
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if (!session_activate(session))
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goto error_bus;
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if (!take_control(session))
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goto error_bus;
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return true;
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error_bus:
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sd_bus_unref(session->bus);
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error:
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free(session->path);
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free(session->id);
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free(session->seat);
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return false;
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}
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@ -1,24 +0,0 @@
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#ifndef SESSION_H
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#define SESSION_H
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#include <systemd/sd-bus.h>
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#include <stdbool.h>
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struct wlr_session {
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sd_bus *bus;
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char *id;
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char *path;
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char *seat;
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};
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bool wlr_session_start(struct wlr_session *session);
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void wlr_session_end(struct wlr_session *session);
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int wlr_session_take_device(struct wlr_session *restrict session,
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const char *restrict path,
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bool *restrict paused_out);
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void wlr_session_release_device(struct wlr_session *session, int fd);
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#endif
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