api: handle undefined shellcmd parameter better

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

diff --git a/PVE/API2/Nodes.pm b/PVE/API2/Nodes.pm
index ad3f6e42908ee8238d7a8dd4a2c012be881d12fa..df47be1fd0d6cb3ad25e2d0a87c262a5bd98a892 100644 (file)
--- a/PVE/API2/Nodes.pm
+++ b/PVE/API2/Nodes.pm
@@ -711,7 +711,7 @@ sub get_shell_command  {
     my ($user, $shellcmd) = @_;
 
     if ($user eq 'root@pam') {
-       if (exists($shell_cmd_map->{$shellcmd})) {
+       if (defined($shellcmd) && exists($shell_cmd_map->{$shellcmd})) {
            return $shell_cmd_map->{$shellcmd};
        } else {
            return [ '/bin/login', '-f', 'root' ];