logic changes

giteainstall

@@ -16,22 +16,40 @@ if [[ $(id -u) -ne 0 ]]; then printf "\nMust be root or use sudo.\n\n" ; exit 1
 giteaport=3000
 if ss -tuln | grep -q ":${giteaport}\b"; then
     printf "\nPort %s appears to be in use.\n" "$giteaport"
-    listener=$(ss -tulpn 2>/dev/null | awk '/:3000\b/ && /LISTEN/ {print $7}' | sed 's/users:(("//; s/",.*//')
+    listener=$(ss -tulpn 2>/dev/null | awk -v port=":${giteaport}\\b" '$0 ~ port && /LISTEN/ {print $7}' | sed 's/users:(("//; s/",.*//')
     if [[ "$listener" == gitea* ]]; then
         printf "Detected a running Gitea-related process: %s\n" "$listener"
         printf "It looks like another Gitea multi-instance installation has not yet completed.\n"
         printf "Please finish its web installer and run its postinstall script before continuing.\n\n"
     elif [[ -n "$listener" ]]; then
-        printf "Process using port 3000 : %s\n" "$listener"
+        printf "Process using port %s : %s\n" "$giteaport" "$listener"
         printf "This port is required temporarily by the Gitea web installer.\n"
         printf "Please stop or reconfigure that application before running this installer.\n\n"
     else
-        printf "Port 3000 is in use by an unknown process.\n"
+        printf "Port %s is in use by an unknown process.\n" "$giteaport"
         printf "Please ensure it is free before running this installer.\n\n"
     fi
     exit 1
 fi
 
+#
+# Check if required services are running or not
+#
+for svc in nginx mariadb; do systemctl is-active --quiet "$svc" || { printf "\n%s is not running, cannot continue...\n\n" "${svc^}" ; exit 1 ; }; done
+
+#
+# Check MariaDB authentication method (socket or not)
+#
+if mysql -u root -e ";" 2>/dev/null; then
+    socket="SOCKET DETECTED — no need for -a or -m"
+    socketusage="SOCKET DETECTED — this flag is not needed"
+    socketauth="yes"
+else
+    socket="NO SOCKET DETECTED — you must use -a and -m"
+    socketusage="NO SOCKET DETECTED — these flags are required"
+    socketauth="no"
+fi
+
 #
 # Define variables and functions
 #
@@ -54,21 +72,18 @@ usage () {
     printf -- "  sudo ./giteainstall -n git3.example.com -p gitea3dbpwd -a admin -m adminpwd\n\n"
 }
 
-serviceno () { printf "\n%s is not running cannot continue...\n\n" "$service"; }
-servicedead () { status=$(systemctl is-active "$service"); if [[ "$status" != "active" ]]; then serviceno ; exit ; fi ; }
-inputcheck () { [[ -z "$hostname" ]] && { usage ; printf "\nError! Hostname empty.\n\n" ; exit 1 ; } ; [[ -z "$dbpass" ]] && { usage ; printf "\nError! Database password empty.\n\n" ; exit 1 ; } ; }
+#
+# Function inputcheck
+#
+inputcheck () {
+    [[ -z "$hostname" ]] && { usage; echo "ERROR: DOMAIN CANNOT BE EMPTY!"; exit 1; }
+    [[ "$hostname" =~ [[:space:]/] ]] && { echo "ERROR: DOMAIN INVALID (no spaces or slashes allowed)"; exit 1; }
+    [[ -z "$dbpass" ]] && { usage; echo "ERROR: DATABASE PASSWORD CANNOT BE EMPTY!"; exit 1; }
+}
 
 #
-# If Nginx and MariaDB are not running then die
+# Let's go
 #
-service="mariadb" ; servicedead ; service="nginx" ; servicedead
-
-#
-# Check MariaDB authentication method (socket or not)
-#
-if mysql -u root -e ";" 2>/dev/null; then socket="SOCKET DETECTED — no need for -a or -m" ; socketusage="SOCKET DETECTED — these flags are not needed" ; socketauth="yes"
-else socket="NO SOCKET DETECTED — you must use -a and -m" ; socketusage="NO SOCKET DETECTED — these flags are required" ; socketauth="no" ; fi
-
 clear
 
 #
@@ -164,7 +179,7 @@ esac
 # Create Gitea temporary Nginx configuration file using port 3000 for web installer
 #
 cp "$nginxsnippets/hostfiles/gitea-multi.80.conf" /etc/nginx/conf.d/"$hostname".conf
-sed -i "s/DOMAIN/$hostname/g" /etc/nginx/conf.d/"$hostname".conf
+sed -i -- "s/DOMAIN/$hostname/g" /etc/nginx/conf.d/"$hostname".conf
 sed -i "s/GITEAPORT/3000/g" /etc/nginx/conf.d/"$hostname".conf
 systemctl restart nginx