sd-login: add SetTTY session object #26611

[thirdparty/systemd.git] / src / login / logind-session-dbus.c

diff --git a/src/login/logind-session-dbus.c b/src/login/logind-session-dbus.c
index e3bebc9188be9d5e818149f51b78a5d6f39583de..00a0e8fd5896d63d127a19651ba652eba96f2e56 100644 (file)
--- a/src/login/logind-session-dbus.c
+++ b/src/login/logind-session-dbus.c
@@ -23,6 +23,7 @@
 #include "path-util.h"
 #include "signal-util.h"
 #include "strv.h"
+#include "terminal-util.h"
 #include "user-util.h"
 
 static int property_get_user(
@@ -421,6 +422,41 @@ static int method_set_display(sd_bus_message *message, void *userdata, sd_bus_er
         return sd_bus_reply_method_return(message, NULL);
 }
 
+static int method_set_tty(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+        Session *s = ASSERT_PTR(userdata);
+        int fd, r, flags;
+        _cleanup_free_ char *q = NULL;
+
+        assert(message);
+
+        r = sd_bus_message_read(message, "h", &fd);
+        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 tty");
+
+        assert(fd >= 0);
+
+        flags = fcntl(fd, F_GETFL, 0);
+        if (flags < 0)
+                return -errno;
+        if ((flags & O_ACCMODE) != O_RDWR)
+                return -EACCES;
+        if (FLAGS_SET(flags, O_PATH))
+                return -ENOTTY;
+
+        r = getttyname_malloc(fd, &q);
+        if (r < 0)
+                return r;
+
+        r = session_set_tty(s, q);
+        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 = ASSERT_PTR(userdata);
         uint32_t major, minor;
@@ -909,6 +945,11 @@ static const sd_bus_vtable session_vtable[] = {
                                 SD_BUS_NO_RESULT,
                                 method_set_display,
                                 SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD_WITH_ARGS("SetTTY",
+                                SD_BUS_ARGS("h", tty_fd),
+                                SD_BUS_NO_RESULT,
+                                method_set_tty,
+                                SD_BUS_VTABLE_UNPRIVILEGED),
         SD_BUS_METHOD_WITH_ARGS("TakeDevice",
                                 SD_BUS_ARGS("u", major, "u", minor),
                                 SD_BUS_RESULT("h", fd, "b", inactive),