try using /etc/realname if it's there

bgpd-check-peers.sh

@@ -17,7 +17,13 @@ _MAILTO="noc@example.com"
 _TMPDIR=/tmp/check-bgp
 _PIDFILE="${_TMPDIR}"/bgpd-check-peers.pid
 
-_HOSTNAME=$(hostname)
+
+if [ -e /etc/realname ]; then
+    _REALNAME=$(cat /etc/realname)
+    _HOSTNAME=$(hostname -s)
+else
+    _HOSTNAME=$(hostname)
+fi
 
 mkdir -p "${_TMPDIR}"
 
@@ -92,7 +98,12 @@ if [[ -f "${_TMPMAILDIR}"/bodynok ]] ; then
     cat "${_TMPMAILDIR}"/bodynok >> "${_TMPMAILDIR}"/body
 fi
 
-cat "${_TMPMAILDIR}"/body | mail -s "[BGP] ${_HOSTNAME} - State change" "${_MAILTO}"
+# Send the mail whether we have a realname or not
+if [ -n "${_REALNAME}" ]; then
+    cat "${_TMPMAILDIR}"/body | mail -s "[BGP] ${_REALNAME} (${_HOSTNAME}) - State change" "${_MAILTO}"
+else
+    cat "${_TMPMAILDIR}"/body | mail -s "[BGP] ${_HOSTNAME} - State change" "${_MAILTO}"
+fi
 
 # cleaning
 if [[ -d  "${_TMPMAILDIR}" ]] ; then