You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
160 lines
6.8 KiB
160 lines
6.8 KiB
From 5cfd162864213c5247d97ea31cfacce98b1caefc Mon Sep 17 00:00:00 2001 |
|
From: David Tardon <dtardon@redhat.com> |
|
Date: Fri, 10 Jun 2022 15:07:01 +0200 |
|
Subject: [PATCH] logind-session-dbus: allow to set display name via dbus |
|
|
|
Currently, the only way to set display name of a graphical session is to |
|
pass it to CreateSession(). But modern display managers like gdm start |
|
the display server as part of the user session, which means that the |
|
display name isn't known yet when the session is being created. Hence, |
|
let's make it possible to set it later. |
|
|
|
(cherry picked from commit 4885d7490b23e08d8444e5a68927ce9ce8727e5a) |
|
|
|
Resolves: #2100340 |
|
--- |
|
man/org.freedesktop.login1.xml | 8 ++++++++ |
|
src/login/logind-session-dbus.c | 29 +++++++++++++++++++++++++++ |
|
src/login/logind-session.c | 20 ++++++++++++++++++ |
|
src/login/logind-session.h | 1 + |
|
src/login/org.freedesktop.login1.conf | 4 ++++ |
|
5 files changed, 62 insertions(+) |
|
|
|
diff --git a/man/org.freedesktop.login1.xml b/man/org.freedesktop.login1.xml |
|
index d25287b18b..c11324ee3b 100644 |
|
--- a/man/org.freedesktop.login1.xml |
|
+++ b/man/org.freedesktop.login1.xml |
|
@@ -1045,6 +1045,7 @@ node /org/freedesktop/login1/session/1 { |
|
TakeControl(in b force); |
|
ReleaseControl(); |
|
SetType(in s type); |
|
+ SetDisplay(in s display); |
|
TakeDevice(in u major, |
|
in u minor, |
|
out h fd, |
|
@@ -1142,6 +1143,8 @@ node /org/freedesktop/login1/session/1 { |
|
|
|
<variablelist class="dbus-method" generated="True" extra-ref="SetType()"/> |
|
|
|
+ <variablelist class="dbus-method" generated="True" extra-ref="SetDisplay()"/> |
|
+ |
|
<variablelist class="dbus-method" generated="True" extra-ref="TakeDevice()"/> |
|
|
|
<variablelist class="dbus-method" generated="True" extra-ref="ReleaseDevice()"/> |
|
@@ -1238,6 +1241,11 @@ node /org/freedesktop/login1/session/1 { |
|
connection. This should help prevent a session from entering an inconsistent state, for example if the |
|
controller crashes. The only argument <varname>type</varname> is the new session type.</para> |
|
|
|
+ <para><function>SetDisplay()</function> allows the display name of the graphical session to be changed. This is |
|
+ useful if the display server is started as part of the session. It can only be called by session's current |
|
+ controller. If <function>TakeControl()</function> has not been called, this method will fail. The only argument |
|
+ <varname>display</varname> is the new display name.</para> |
|
+ |
|
<para><function>TakeDevice()</function> allows a session controller to get a file descriptor for a |
|
specific device. Pass in the major and minor numbers of the character device and |
|
<filename>systemd-logind</filename> will return a file descriptor for the device. Only a limited set of |
|
diff --git a/src/login/logind-session-dbus.c b/src/login/logind-session-dbus.c |
|
index ff4cd0a631..5480d7b2f4 100644 |
|
--- a/src/login/logind-session-dbus.c |
|
+++ b/src/login/logind-session-dbus.c |
|
@@ -413,6 +413,30 @@ static int method_set_type(sd_bus_message *message, void *userdata, sd_bus_error |
|
return sd_bus_reply_method_return(message, NULL); |
|
} |
|
|
|
+static int method_set_display(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
|
+ Session *s = ASSERT_PTR(userdata); |
|
+ const char *display; |
|
+ int r; |
|
+ |
|
+ assert(message); |
|
+ |
|
+ r = sd_bus_message_read(message, "s", &display); |
|
+ if (r < 0) |
|
+ return r; |
|
+ |
|
+ if (!session_is_controller(s, sd_bus_message_get_sender(message))) |
|
+ return sd_bus_error_set(error, BUS_ERROR_NOT_IN_CONTROL, "You must be in control of this session to set display"); |
|
+ |
|
+ if (!SESSION_TYPE_IS_GRAPHICAL(s->type)) |
|
+ return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Setting display is only supported for graphical sessions"); |
|
+ |
|
+ r = session_set_display(s, display); |
|
+ if (r < 0) |
|
+ return r; |
|
+ |
|
+ return sd_bus_reply_method_return(message, NULL); |
|
+} |
|
+ |
|
static int method_take_device(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
|
Session *s = userdata; |
|
uint32_t major, minor; |
|
@@ -901,6 +925,11 @@ static const sd_bus_vtable session_vtable[] = { |
|
SD_BUS_NO_RESULT, |
|
method_set_type, |
|
SD_BUS_VTABLE_UNPRIVILEGED), |
|
+ SD_BUS_METHOD_WITH_ARGS("SetDisplay", |
|
+ SD_BUS_ARGS("s", display), |
|
+ SD_BUS_NO_RESULT, |
|
+ method_set_display, |
|
+ SD_BUS_VTABLE_UNPRIVILEGED), |
|
SD_BUS_METHOD_WITH_ARGS("TakeDevice", |
|
SD_BUS_ARGS("u", major, "u", minor), |
|
SD_BUS_RESULT("h", fd, "b", inactive), |
|
diff --git a/src/login/logind-session.c b/src/login/logind-session.c |
|
index ab98a5055d..a052596e57 100644 |
|
--- a/src/login/logind-session.c |
|
+++ b/src/login/logind-session.c |
|
@@ -1044,6 +1044,26 @@ void session_set_type(Session *s, SessionType t) { |
|
session_send_changed(s, "Type", NULL); |
|
} |
|
|
|
+int session_set_display(Session *s, const char *display) { |
|
+ int r; |
|
+ |
|
+ assert(s); |
|
+ assert(display); |
|
+ |
|
+ if (streq(s->display, display)) |
|
+ return 0; |
|
+ |
|
+ r = free_and_strdup(&s->display, display); |
|
+ if (r < 0) |
|
+ return r; |
|
+ |
|
+ session_save(s); |
|
+ |
|
+ session_send_changed(s, "Display", NULL); |
|
+ |
|
+ return 1; |
|
+} |
|
+ |
|
static int session_dispatch_fifo(sd_event_source *es, int fd, uint32_t revents, void *userdata) { |
|
Session *s = userdata; |
|
|
|
diff --git a/src/login/logind-session.h b/src/login/logind-session.h |
|
index 5c35071dc5..6b6ac2d573 100644 |
|
--- a/src/login/logind-session.h |
|
+++ b/src/login/logind-session.h |
|
@@ -137,6 +137,7 @@ int session_set_idle_hint(Session *s, bool b); |
|
int session_get_locked_hint(Session *s); |
|
void session_set_locked_hint(Session *s, bool b); |
|
void session_set_type(Session *s, SessionType t); |
|
+int session_set_display(Session *s, const char *display); |
|
int session_create_fifo(Session *s); |
|
int session_start(Session *s, sd_bus_message *properties, sd_bus_error *error); |
|
int session_stop(Session *s, bool force); |
|
diff --git a/src/login/org.freedesktop.login1.conf b/src/login/org.freedesktop.login1.conf |
|
index 95d2ef0f06..6113b64aa7 100644 |
|
--- a/src/login/org.freedesktop.login1.conf |
|
+++ b/src/login/org.freedesktop.login1.conf |
|
@@ -346,6 +346,10 @@ |
|
send_interface="org.freedesktop.login1.User" |
|
send_member="Kill"/> |
|
|
|
+ <allow send_destination="org.freedesktop.login1" |
|
+ send_interface="org.freedesktop.login1.Session" |
|
+ send_member="SetDisplay"/> |
|
+ |
|
<allow receive_sender="org.freedesktop.login1"/> |
|
</policy> |
|
|
|
|