+static int export_legacy_dbus_address(
+ pam_handle_t *handle,
+ uid_t uid,
+ const char *runtime) {
+
+#ifdef ENABLE_KDBUS
+ _cleanup_free_ char *s = NULL;
+ int r;
+
+ /* skip export if kdbus is not active */
+ if (access("/dev/kdbus", F_OK) < 0)
+ return PAM_SUCCESS;
+
+ if (asprintf(&s, KERNEL_USER_BUS_FMT ";" UNIX_USER_BUS_FMT,
+ (unsigned long) uid, runtime) < 0) {
+ pam_syslog(handle, LOG_ERR, "Failed to set bus variable.");
+ return PAM_BUF_ERR;
+ }
+
+ r = pam_misc_setenv(handle, "DBUS_SESSION_BUS_ADDRESS", s, 0);
+ if (r != PAM_SUCCESS) {
+ pam_syslog(handle, LOG_ERR, "Failed to set bus variable.");
+ return r;
+ }
+#endif
+ return PAM_SUCCESS;
+}
+