add rpm generation code

src/preinstall.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+USER="vctp"
+GROUP="dtms"
+
+# Path to the custom sudoers file
+SUDOERS_FILE="/etc/sudoers.d/${USER}"
+
+# create a group & user if not exists
+getent group "$GROUP" >/dev/null || groupadd -r "$GROUP"; /bin/true
+getent passwd "$USER" >/dev/null || useradd -r -g "$GROUP" -m -s /bin/bash -c "vctp service" "$USER"
+getent passwd tftp >/dev/null || useradd -r -g tftp -s /sbin/nologin tftp
+
+# create vctp config directory if it doesn't exist
+[ -d /etc/dtms ] || mkdir -p /etc/dtms
+
+# set group ownership on vctp config directory if not already done
+[ "$(stat -c "%G" /etc/dtms)" = "$GROUP" ] || chgrp -R "$GROUP" /etc/dtms
+
+# set permissions on vctp config directory if not already done
+[ "$(stat -c "%a" /etc/dtms)" = "774" ] || chmod -R 774 /etc/dtms
+
+# create vctp data directory if it doesn't exist
+[ -d /var/lib/vctp ] || mkdir -p /var/lib/vctp
+
+# set user ownership on vctp data directory if not already done
+[ "$(stat -c "%U" /var/lib/vctp)" = "$USER" ] || chown -R "$USER" /var/lib/vctp
+
+# set group ownership on vctp data directory if not already done
+[ "$(stat -c "%G" /var/lib/vctp)" = "$GROUP" ] || chgrp -R "$GROUP" /var/lib/vctp
+
+# Check if firewalld is installed and active
+if command -v systemctl >/dev/null 2>&1 && systemctl is-enabled firewalld >/dev/null 2>&1 && systemctl is-active firewalld >/dev/null 2>&1; then
+    echo "Firewalld is enabled and running. Adding necessary ports..."
+
+    # Open HTTPS port (443/tcp)
+    firewall-cmd --permanent --add-service=https >/dev/null 2>&1
+
+    # Open custom application port (9443/tcp)
+    firewall-cmd --permanent --add-port=9443/tcp >/dev/null 2>&1
+
+    # Reload firewalld to apply changes
+    firewall-cmd --reload >/dev/null 2>&1
+else
+    echo "Firewalld is not running or not enabled. Skipping firewall configuration."
+fi