Create n2n user and use in the supernode service

packages/debian/debian/postinst

@@ -17,6 +17,16 @@ esac
 
 umask 022
 
+if ! grep -q n2n /etc/group; then
+    echo 'Creating n2n group'
+    /usr/sbin/groupadd -r n2n
+fi
+
+if ! /usr/bin/id -u n2n > /dev/null 2>&1; then
+    echo "Creating n2n user..."
+    /usr/sbin/useradd -M -N -g n2n -r -s /bin/false n2n
+fi
+
 echo "Rebuilding ld cache..."
 /sbin/ldconfig
 

packages/etc/systemd/system/supernode.service.in

@@ -5,7 +5,8 @@ Wants=network-online.target
 
 [Service]
 Type=simple
-ExecStartPre=
+User=n2n
+Group=n2n
 ExecStart=/usr/sbin/supernode /etc/n2n/supernode.conf -f
 Restart=on-abnormal
 RestartSec=5

packages/rpm/n2n.spec.in

@@ -69,6 +69,16 @@ rm -fr $RPM_BUILD_ROOT
 
 %pre
 
+if ! grep -q n2n /etc/group; then
+  echo 'Creating n2n group'
+  /usr/sbin/groupadd -r n2n
+fi
+
+if ! /usr/bin/id -u n2n > /dev/null 2>&1; then
+  echo 'Creating n2n user'
+  /usr/sbin/useradd -M -N -g n2n -r -s /bin/false n2n
+fi
+
 %post
 if [ ! -f /.dockerenv ]; then
     /bin/systemctl daemon-reload