Check arguments in functions

diff --git a/etcdiff.include b/etcdiff.include
index e26498c..44564d8 100644 (file)
--- a/etcdiff.include
+++ b/etcdiff.include
@@ -3,6 +3,13 @@
 _get_unpack_package()
 {
   PACKAGE=$1
+
+  if [ "x$PACKAGE" = "x" ];
+  then
+    echo "Argument missing."
+    exit 1
+  fi
+
   FILEPATH=$(apt-cache show $PACKAGE | grep ^Filename | cut -d ' ' -f 2-)
 
   if [ "x$FILEPATH" = "x" ];
@@ -23,6 +30,12 @@ _do_etcdiff()
   ETCBASEDIR=$1
   PREFIX=$2
 
+  if [ "x$ETCBASEDIR" = "x" ];
+  then
+    echo "Argument missing."
+    exit 1
+  fi
+
   REPORT_NAME=$(basename $ETCBASEDIR)
 
   # Report diff between debian conf and our local one
@@ -73,6 +86,12 @@ etcdiff_by_package()
 {
   PACKAGE=$1
 
+  if [ "x$PACKAGE" = "x" ];
+  then
+    echo "Argument missing."
+    exit 1
+  fi
+
   if dpkg --status $PACKAGE | grep -q 'not-installed';
   then
     echo "Package '$PACKAGE' not installed"
@@ -97,6 +116,12 @@ etcdiff_by_file()
 {
   FILE=$1
 
+  if [ "x$FILE" = "x" ];
+  then
+    echo "Argument missing."
+    exit 1
+  fi
+
   if [ ! -e $FILE ];
   then
     echo "ERROR, file $FILE does not exist."