extended input validation

zabbixinstall

@@ -91,7 +91,7 @@ while getopts ":n:p:m:a:h" option; do
 done
 
 #
-# Validate hostname and DB password
+# Parse and validate input
 #
 if [[ -z "$hostname" || -z "$dbpass" ]]; then
     usage
@@ -115,14 +115,14 @@ if [[ "$hostname" =~ [[:space:]/_] ]]; then
     exit 1
 fi
 
-# RFC 1123 validation
+# Validate domain format (RFC 1123)
 if [[ ! "$hostname" =~ ^([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,}$ ]]; then
     printf "\nERROR: Invalid domain format.\n"
     printf "Example of valid input: zabbix.example.com\n\n"
     exit 1
 fi
 
-# DB password sanity check
+# Check for spaces in DB credentials
 if [[ "$dbpass" =~ [[:space:]] ]]; then
     printf "\nERROR: Database password cannot contain spaces.\n\n"
     exit 1