<funcdef>int <function>sd_seat_can_multi_session</function></funcdef>
<paramdef>const char* <parameter>seat</parameter></paramdef>
</funcprototype>
+
+ <funcprototype>
+ <funcdef>int <function>sd_seat_can_tty</function></funcdef>
+ <paramdef>const char* <parameter>seat</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>int <function>sd_seat_can_graphical</function></funcdef>
+ <paramdef>const char* <parameter>seat</parameter></paramdef>
+ </funcprototype>
</funcsynopsis>
</refsynopsisdiv>
sessions in parallel (whith only one being active at a
time).</para>
+ <para><function>sd_seat_can_tty()</function> may be
+ used to determine whether a specific seat provides TTY
+ functionality, i.e. is useful as a text console.</para>
+
+ <para><function>sd_seat_can_graphical()</function> may
+ be used to determine whether a specific seat provides
+ graphics functionality, i.e. is useful as a graphics
+ display.</para>
+
<para>If the <literal>seat</literal> parameter of any
of these functions is passed as NULL the operation is
executed for the seat of the session of the calling
<function>sd_seat_get_sessions()</function> returns
the number of entries in the session identifier
array. If the test succeeds
- <function>sd_seat_can_multi_session</function> returns
- a positive integer, if it fails 0. On failure, these
+ <function>sd_seat_can_multi_session</function>,
+ <function>sd_seat_can_tty</function> and
+ <function>sd_seat_can_graphical</function> return a
+ positive integer, if it fails 0. On failure, these
calls return a negative errno-style error code.</para>
</refsect1>
<title>Notes</title>
<para>The <function>sd_seat_get_active()</function>,
- <function>sd_seat_get_sessions()</function>, and
- <function>sd_seat_can_multi_session()</function> interfaces
+ <function>sd_seat_get_sessions()</function>,
+ <function>sd_seat_can_multi_session()</function>,
+ <function>sd_seat_can_tty()</function> and
+ <function>sd_seat_can_grapical()</function> interfaces
are available as shared library, which can be compiled
and linked to with the
<literal>libsystemd-login</literal>
<para>If the test succeeds
<function>sd_session_is_active()</function> returns a
positive integer, if it fails 0. On success
+ <function>sd_session_get_state()</function>,
<function>sd_session_get_uid()</function>,
- <function>sd_session_get_service()</function> and
- <function>sd_session_get_seat()</function> return 0 or
+ <function>sd_session_get_seat()</function>,
+ <function>sd_session_get_service()</function>,
+ <function>sd_session_get_type()</function>,
+ <function>sd_session_get_class()</function> and
+ <function>sd_session_get_display()</function> return 0 or
a positive integer. On failure, these calls return a
negative errno-style error code.</para>
</refsect1>
<title>Notes</title>
<para>The <function>sd_session_is_active()</function>,
+ <function>sd_session_get_state()</function>,
<function>sd_session_get_uid()</function>,
- <function>sd_session_get_service()</function> and
- <function>sd_session_get_seat()</function> interfaces
+ <function>sd_session_get_seat()</function>,
+ <function>sd_session_get_service()</function>,
+ <function>sd_session_get_type()</function>,
+ <function>sd_session_get_class()</function> and
+ <function>sd_session_get_display()</function> interfaces
are available as shared library, which can be compiled
and linked to with the
<literal>libsystemd-login</literal>
LIBSYSTEMD_LOGIN_186 {
global:
sd_session_get_state;
+ sd_seat_can_tty;
+ sd_seat_can_graphical;
} LIBSYSTEMD_LOGIN_43;
return r;
}
-_public_ int sd_seat_can_multi_session(const char *seat) {
+static int seat_get_can(const char *seat, const char *variable) {
char *p, *s = NULL;
int r;
return r;
r = parse_env_file(p, NEWLINE,
- "CAN_MULTI_SESSION", &s,
+ variable, &s,
NULL);
free(p);
return r;
}
+_public_ int sd_seat_can_multi_session(const char *seat) {
+ return seat_get_can(seat, "CAN_MULTI_SESSION");
+}
+
+_public_ int sd_seat_can_tty(const char *seat) {
+ return seat_get_can(seat, "CAN_TTY");
+}
+
+_public_ int sd_seat_can_graphical(const char *seat) {
+ return seat_get_can(seat, "CAN_GRAPHICAL");
+}
+
_public_ int sd_get_seats(char ***seats) {
return get_files_in_directory("/run/systemd/seats/", seats);
}
assert_se(r >= 0);
printf("can do multi session = %s\n", yes_no(r));
+ r = sd_seat_can_tty(seat);
+ assert_se(r >= 0);
+ printf("can do tty = %s\n", yes_no(r));
+
+ r = sd_seat_can_graphical(seat);
+ assert_se(r >= 0);
+ printf("can do graphical = %s\n", yes_no(r));
+
assert_se(sd_uid_get_state(u, &state) >= 0);
printf("state = %s\n", state);
/* Return whether the seat is multi-session capable */
int sd_seat_can_multi_session(const char *seat);
+/* Return whether the seat is TTY capable, i.e. suitable for showing console UIs */
+int sd_seat_can_tty(const char *seat);
+
+/* Return whether the seat is graphics capable, i.e. suitable for showing graphical UIs */
+int sd_seat_can_graphical(const char *seat);
+
/* Get all seats, store in *seats. Returns the number of seats. If
* seats is NULL only returns number of seats. */
int sd_get_seats(char ***seats);