extended input validation

dokuwikiinstall

@@ -41,15 +41,33 @@ usage () {
 #
 # Parse and validate input
 #
-if [[ $# -ne 1 ]]; then usage ; printf "ERROR: Exactly one argument (the domain) is required.\n\n" ; exit 1 ; fi
+if [[ $# -ne 1 ]]; then
+    usage
+    printf "ERROR: Exactly one argument (the domain ony).\n\n"
+    exit 1
+fi
 
-hostname="$1" ; hostname=$(echo "$hostname" | tr '[:upper:]' '[:lower:]')
+# Convert to lowercase (domains are case-insensitive)
+hostname=$(echo "$hostname" | tr '[:upper:]' '[:lower:]')
 
-if [[ "$hostname" =~ [[:space:]/_] ]]; then printf "ERROR: Domain cannot contain spaces, slashes, or underscores.\n\n" ; exit 1 ; fi
+# Ensure domain is not empty
+if [[ -z "$hostname" ]]; then
+    printf "ERROR: Domain cannot be empty.\n\n"
+    usage
+    exit 1
+fi
 
+# Disallow spaces, slashes, or underscores
+if [[ "$hostname" =~ [[:space:]/_] ]]; then
+    printf "ERROR: Domain cannot contain spaces, slashes, or underscores.\n\n"
+    exit 1
+fi
+
+# Validate domain format (RFC 1123)
 if [[ ! "$hostname" =~ ^([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,}$ ]]; then
     printf "ERROR: Invalid domain format.\n"
-    printf "Example of valid input: wiki.example.com\n\n" ; exit 1
+    printf "Example of valid input: wiki.example.com\n\n"
+    exit 1
 fi
 
 #
@@ -57,11 +75,6 @@ fi
 #
 clear
 
-#
-# Check if input conditions are met
-#
-inputcheck "$hostname"
-
 #
 # Ensure curl is available
 #