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launcher: Pull finding the display session out of find_systemd_session

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Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4022>
This commit is contained in:
Sebastian Wick 2024-11-12 19:06:53 +01:00
parent 98b347b204
commit 32b7eae80c
1 changed files with 65 additions and 67 deletions
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132
src/backends/meta-launcher.c
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@ -124,6 +124,68 @@ meta_launcher_init (MetaLauncher *launcher)
{
}
static char *
get_display_session (GError **error)
{
g_autofree char *session_id = NULL;
int saved_errno;
int n_sessions;
g_auto (GStrv) sessions = NULL;
saved_errno = sd_uid_get_display (getuid (), &session_id);
if (saved_errno >= 0)
return g_steal_pointer (&session_id);
if (saved_errno != -ENODATA)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND,
"Couldn't get display for user %d: %s",
getuid (),
g_strerror (-saved_errno));
return NULL;
}
/* no session, maybe there's a greeter session */
n_sessions = sd_uid_get_sessions (getuid (), 1, &sessions);
if (n_sessions < 0)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND,
"Failed to get all sessions for user %d (%m)",
getuid ());
return NULL;
}
if (n_sessions == 0)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND,
"User %d has no sessions",
getuid ());
return NULL;
}
for (int i = 0; i < n_sessions; ++i)
{
g_autofree char *class = NULL;
saved_errno = sd_session_get_class (sessions[i], &class);
if (saved_errno < 0)
{
g_warning ("Couldn't get class for session '%d': %s",
i,
g_strerror (-saved_errno));
continue;
}
if (g_strcmp0 (class, "greeter") == 0)
return g_strdup (sessions[i]);
}
g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND,
"Couldn't find a session or a greeter session for user %d",
getuid ());
return NULL;
}
static gboolean
find_systemd_session (char **session_id,
GError **error)
@ -137,7 +199,6 @@ find_systemd_session (char **session_id,
g_autofree char *type = NULL;
g_autofree char *state = NULL;
g_auto (GStrv) sessions = NULL;
int n_sessions;
int saved_errno;
const char *xdg_session_id = NULL;
@ -185,72 +246,9 @@ find_systemd_session (char **session_id,
return TRUE;
}
saved_errno = sd_uid_get_display (getuid (), &local_session_id);
if (saved_errno < 0)
{
/* no session, maybe there's a greeter session */
if (saved_errno == -ENODATA)
{
n_sessions = sd_uid_get_sessions (getuid (), 1, &sessions);
if (n_sessions < 0)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_NOT_FOUND,
"Failed to get all sessions for user %d (%m)",
getuid ());
return FALSE;
}
if (n_sessions == 0)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_NOT_FOUND,
"User %d has no sessions",
getuid ());
return FALSE;
}
for (int i = 0; i < n_sessions; ++i)
{
saved_errno = sd_session_get_class (sessions[i], &class);
if (saved_errno < 0)
{
g_warning ("Couldn't get class for session '%d': %s",
i,
g_strerror (-saved_errno));
continue;
}
if (g_strcmp0 (class, "greeter") == 0)
{
local_session_id = g_strdup (sessions[i]);
break;
}
}
if (!local_session_id)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_NOT_FOUND,
"Couldn't find a session or a greeter session for user %d",
getuid ());
return FALSE;
}
}
else
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_NOT_FOUND,
"Couldn't get display for user %d: %s",
getuid (),
g_strerror (-saved_errno));
return FALSE;
}
}
local_session_id = get_display_session (error);
if (!local_session_id)
return FALSE;
/* sd_uid_get_display will return any session if there is no graphical
* one, so let's check it really is graphical. */