X-Git-Url: http://xvm.mit.edu/gitweb/invirt/scripts/git-hooks.git/blobdiff_plain/2ed8d68d8744dbc7819c3527b30c91eb5663a91c..0a9cf90391cf2ced2cf02b93c193e31ab0733569:/sub/update

diff --git a/sub/update b/sub/update
index fbdde3d..2986daa 100755
--- a/sub/update
+++ b/sub/update
@@ -13,7 +13,7 @@ if [ -z "$GIT_DIR" ]; then
         exit 1
 fi
 
-if [ -z "$ref" -o -z "$oldrev" -o -z "$newrev" ]; then
+if [ -z "$ref" ] || [ -z "$oldrev" ] || [ -z "$newrev" ]; then
         echo "Usage: $0 <ref> <oldrev> <newrev>" >&2
         exit 1
 fi