diff options
Diffstat (limited to 'backend/session/logind.c')
| -rw-r--r-- | backend/session/logind.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/backend/session/logind.c b/backend/session/logind.c index 39143a2f..b86cf3dc 100644 --- a/backend/session/logind.c +++ b/backend/session/logind.c @@ -35,6 +35,11 @@ struct logind_session { char *id; char *path; + + // specifies whether a drm device was taken + // if so, the session will be (de)activated with the drm fd, + // otherwise with the dbus PropertiesChanged on "active" signal + bool has_drm; }; static struct logind_session *logind_session_from_session( @@ -43,6 +48,30 @@ static struct logind_session *logind_session_from_session( return (struct logind_session *)base; } +static void parse_active(struct logind_session *session, + struct sd_bus_message *msg) { + int ret; + ret = sd_bus_message_enter_container(msg, 'v', "b"); + if (ret < 0) { + wlr_log(WLR_ERROR, "Failed to parse D-Bus active property (1): %s", + strerror(-ret)); + return; + } + + bool active; + ret = sd_bus_message_read_basic(msg, 'b', &active); + if (ret < 0) { + wlr_log(WLR_ERROR, "Failed to parse D-Bus active property (2): %s", + strerror(-ret)); + return; + } + + if (!session->has_drm) { + session->base.active = active; + wlr_signal_emit_safe(&session->base.session_signal, session); + } +} + static int logind_take_device(struct wlr_session *base, const char *path) { struct logind_session *session = logind_session_from_session(base); @@ -57,6 +86,10 @@ static int logind_take_device(struct wlr_session *base, const char *path) { return -1; } + if (major(st.st_rdev) == DRM_MAJOR) { + session->has_drm = true; + } + ret = sd_bus_call_method(session->bus, "org.freedesktop.login1", session->path, "org.freedesktop.login1.Session", "TakeDevice", &error, &msg, "uu", major(st.st_rdev), minor(st.st_rdev)); @@ -262,6 +295,7 @@ static int pause_device(sd_bus_message *msg, void *userdata, sd_bus_error *ret_e } if (major == DRM_MAJOR) { + assert(session->has_drm); session->base.active = false; wlr_signal_emit_safe(&session->base.session_signal, session); } @@ -307,6 +341,107 @@ error: return 0; } +static int properties_changed(sd_bus_message *msg, void *userdata, + sd_bus_error *ret_error) { + struct logind_session *session = userdata; + int ret = 0; + + // if we have drm fd we don't depend on this + if (session->has_drm) { + return 0; + } + + // PropertiesChanged 1: interface + const char *interface; + ret = sd_bus_message_read_basic(msg, 's', &interface); // skip path + if (ret < 0) { + wlr_log(WLR_ERROR, "Failed to parse D-Bus PropertiesChanged (1) %s", + strerror(-ret)); + goto error; + } + + if (strcmp(interface, "org.freedesktop.login1.Session") != 0) { + // not interesting for us; ignore + wlr_log(WLR_DEBUG, "ignoring PropertiesChanged from %s", interface); + return 0; + } + + // PropertiesChanged 2: changed properties with values + ret = sd_bus_message_enter_container(msg, 'a', "{sv}"); + if (ret < 0) { + wlr_log(WLR_ERROR, "Failed to parse D-Bus PropertiesChanged (2) %s", + strerror(-ret)); + goto error; + } + + const char *s; + while ((ret = sd_bus_message_enter_container(msg, 'e', "sv")) > 0) { + ret = sd_bus_message_read_basic(msg, 's', &s); + if (ret < 0) { + wlr_log(WLR_ERROR, "Failed to parse D-Bus PropertiesChanged (3) %s", + strerror(-ret)); + goto error; + } + + if (strcmp(s, "Active") == 0) { + parse_active(session, msg); + return 0; + } else { + sd_bus_message_skip(msg, "{sv}"); + } + + ret = sd_bus_message_exit_container(msg); + if (ret < 0) { + wlr_log(WLR_ERROR, "Failed to parse D-Bus PropertiesChanged (4) %s", + strerror(-ret)); + goto error; + } + } + + if (ret < 0) { + wlr_log(WLR_ERROR, "Failed to parse D-Bus PropertiesChanged (5) %s", + strerror(-ret)); + goto error; + } + + ret = sd_bus_message_exit_container(msg); + if (ret < 0) { + wlr_log(WLR_ERROR, "Failed to parse D-Bus PropertiesChanged (6) %s", + strerror(-ret)); + goto error; + } + + // PropertiesChanged 3: changed properties without values + sd_bus_message_enter_container(msg, 'a', "s"); + while ((ret = sd_bus_message_read_basic(msg, 's', &s)) > 0) { + if (strcmp(s, "Active") == 0) { + sd_bus_error error = SD_BUS_ERROR_NULL; + sd_bus_message *answer = NULL; + ret = sd_bus_call_method(session->bus, "org.freedesktop.login1", + session->path, "org.freedesktop.DBus.Properties", "Get", + &error, &answer, "ss", "org.freedesktop.login1.Session", + "Active"); + if (ret < 0) { + wlr_log(WLR_ERROR, "Failed to get active property: '%s' (%s)", + error.message, strerror(ret)); + goto error; + } + + parse_active(session, answer); + return 0; + } + } + + if (ret < 0) { + wlr_log(WLR_ERROR, "Failed to parse D-Bus PropertiesChanged (7) %s", + strerror(-ret)); + goto error; + } + +error: + return 0; +} + static bool add_signal_matches(struct logind_session *session) { int ret; @@ -338,6 +473,14 @@ static bool add_signal_matches(struct logind_session *session) { return false; } + ret = sd_bus_match_signal(session->bus, NULL, "org.freedesktop.login1", + session->path, "org.freedesktop.DBus.Properties", "PropertiesChanged", + properties_changed, session); + if (ret < 0) { + wlr_log(WLR_ERROR, "Failed to add D-Bus match: %s", strerror(-ret)); + return false; + } + return true; } |