95nbd/nbdroot.sh: removed bashism

diff --git a/modules.d/95nbd/nbdroot.sh b/modules.d/95nbd/nbdroot.sh
index 0e7dd9bd670bf98f80d6bd66259c58752be35b9d..765612046866d2d8a432c1a6c55c5a4d2d0f9e99 100755 (executable)
--- a/modules.d/95nbd/nbdroot.sh
+++ b/modules.d/95nbd/nbdroot.sh
@@ -31,7 +31,7 @@ nbdflags=${root%%:*}
 nbdopts=${root#*:}
 
 # If nbdport not an integer, then assume name based import
-if [[ $nbdport != [0-9]* ]]; then
+if [ "${nbdport%[0-9]}" = "$nbdport" ]; then
     nbdport="-N $nbdport"
 fi