Add additional check on /dev/nvram to avoid misleading error message

[yaboot.git] / ybin / ybin

diff --git a/ybin/ybin b/ybin/ybin
index beebfac807dfc2125e54222f7701efb403c34042..029c868a83be178f55e194e21ff647275c9c8519 100755 (executable)
--- a/ybin/ybin
+++ b/ybin/ybin
@@ -462,6 +462,10 @@ checkconf()
                    echo 1>&2 "$PRG: /dev/nvram: Permission denied"
                    echo 1>&2 "$PRG: Warning: nvram will not be updated"
                    nonvram=1
+               elif ! (dd if=/dev/nvram of=/dev/null bs=1 count=10 > /dev/null 2>&1) ; then
+                   echo 1>&2 "$PRG: /dev/nvram: No such device"
+                   echo 1>&2 "$PRG: Warning: nvram will not be updated"
+                   nonvram=1
                else
                    nonvram=1
                    echo 1>&2 "$PRG: Warning: Incompatible version of \`nvsetenv', nvram will not be updated"