perm: ensure subprocess gets killed in perm script

Rarely, the child process create from exec line doesn't die when the
main script ends.  Ensure it gets killed.

Change-Id: Ic2e1de9a1a6eeb55fc8eda39201976180f29a7f9

divingbell/templates/bin/_perm.sh.tpl

@@ -211,6 +211,11 @@ fi
 echo 0 > "${hash}/exit_code"
 {{- end}}
 log.INFO 'Putting the daemon to sleep for {{ $perm_loop_sleep_interval }} seconds.'
+
+# Slight sleep to ensure the last log entry gets processed, then ensure the subprocess
+# that's formatting entries is killed.
+sleep 1
+kill $SUB_PID
 EOF
 
 chmod 755 {{ .Values.conf.chroot_mnt_path | quote }}/tmp/perm_host.sh

divingbell/templates/bin/_shcommon.tpl

@@ -74,6 +74,8 @@ exec >& >(while read line; do
             fi
           done)
 
+SUB_PID=$!
+
 die(){
   # write to stderr any passed error message
   if [[ $@ = *[!\ ]* ]]; then