pam: check environ[] for XDG_SEAT as fallback

This is useful for systems such as kmscon which want to invoke classic
/sbin/login but use it on multiple seats.

diff --git a/src/login/pam-module.c b/src/login/pam-module.c
index 0d387918c7eac328a63fa6d932ca6c82728f399f..af108c46d59aa4f9babf61b96f0efa7596610aea 100644 (file)
--- a/src/login/pam-module.c
+++ b/src/login/pam-module.c
@@ -428,8 +428,14 @@ _public_ PAM_EXTERN int pam_sm_open_session(
         pam_get_item(handle, PAM_TTY, (const void**) &tty);
         pam_get_item(handle, PAM_RUSER, (const void**) &remote_user);
         pam_get_item(handle, PAM_RHOST, (const void**) &remote_host);
         pam_get_item(handle, PAM_TTY, (const void**) &tty);
         pam_get_item(handle, PAM_RUSER, (const void**) &remote_user);
         pam_get_item(handle, PAM_RHOST, (const void**) &remote_host);

+

         seat = pam_getenv(handle, "XDG_SEAT");
         seat = pam_getenv(handle, "XDG_SEAT");

+        if (isempty(seat))
+                seat = getenv("XDG_SEAT");
+

         cvtnr = pam_getenv(handle, "XDG_VTNR");
         cvtnr = pam_getenv(handle, "XDG_VTNR");

+        if (isempty(cvtnr))
+                cvtnr = getenv("XDG_VTNR");

 
         service = strempty(service);
         tty = strempty(tty);
 
         service = strempty(service);
         tty = strempty(tty);


@@ -467,6 +473,8 @@ _public_ PAM_EXTERN int pam_sm_open_session(
                    !isempty(tty) ? "tty" : "unspecified";
 
         class = pam_getenv(handle, "XDG_SESSION_CLASS");
                    !isempty(tty) ? "tty" : "unspecified";
 
         class = pam_getenv(handle, "XDG_SESSION_CLASS");

+        if (isempty(class))
+                class = getenv("XDG_SESSION_CLASS");

         if (isempty(class))
                 class = "user";
 
         if (isempty(class))
                 class = "user";