Do now override hostname variable in script

dhclient-script

@@ -58,6 +58,7 @@ eventually_add_hostnames_domain_to_search() {
     search="${1}"
     if need_hostname; then
         status=1
+        OLD_HOSTNAME=$HOSTNAME
         if [ -n "${new_ip_address}" ]; then
             eval $(/usr/bin/ipcalc --silent --hostname "${new_ip_address}" ; echo "status=$?")
         elif [ -n "${new_ip6_address}" ]; then
@@ -67,6 +68,7 @@ eventually_add_hostnames_domain_to_search() {
         if [ ${status} -eq 0 ]; then
             domain=$(echo "${HOSTNAME}" | cut -s -d "." -f 2-)
         fi
+        HOSTNAME=$OLD_HOSTNAME
     else
           domain=$(hostnamectl --transient 2>/dev/null | cut -s -d "." -f 2-)
     fi

dhcp.spec

@@ -20,7 +20,7 @@ Summary:  Dynamic host configuration protocol software
 Name:     dhcp
 Version:  4.3.6
 %global VERSION %%{version}%%{prever}
-Release:  5%{?dist}
+Release:  6%{?dist}
 # NEVER CHANGE THE EPOCH on this package.  The previous maintainer (prior to
 # dcantrell maintaining the package) made incorrect use of the epoch and
 # that's why it is at 12 now.  It should have never been used, but it was.
@@ -661,6 +661,9 @@ done
 %endif
 
 %changelog
+* Wed Sep 20 2017 Pavel Zhukov <pzhukov@redhat.com> - 12:4.3.6-6
+- Do now override hostname variable in script
+
 * Sun Sep 10 2017 Peter Robinson <pbrobinson@fedoraproject.org> 12:4.3.6-5
 - Rebuild for bind 9.9.11