#!/bin/bash
# This is a simple daemon shell script.
#
# Traps:
# signal HUP (1) read config file again
# signal QUIT (3) delete temp files
# signal TERM (15) delete temp files

# variables
CONFFILE=/etc/cpkg-daemon/cpkg.conf

LLX_COMMONLIB="/usr/share/lliurex/llxcfg-common/llxcfg-common.sh"
[ -f "${LLX_COMMONLIB}" ] || exit 1
. ${LLX_COMMONLIB}A
[ -x "$CPKG_BACKEND" ] || exit 1

# functions
create_pipe(){
   # this code must go on the postinstall
   mkdir -p "$(dirname "$CPKG_PIPE")"
   if [ ! -p "$CPKG_PIPE" ] ; then
      rm -f "$CPKG_PIPE"
      mkfifo -m $LLXCFG_MODE "$CPKG_PIPE"
   fi
   chgrp $LLXCFG_GROUP "$CPKG_PIPE"
   [ ! -p "$CPKG_PIPE" ] && return 1
   return 0
}

end_daemon(){
   rm -f $PID_FILE
   exit 0
}

# main
# load conffile
[ -f "$CONFFILE" ] && source "$CONFFILE"

create_pipe
if [ "$1" = "--pidfile" -a "$2" ] ;then
   touch "$2" &> /dev/null || true
   [ -f "$2" ] && PID_FILE="$2"
fi
echo "$$" > "$PID_FILE"

# set traps
trap '[ -f "$CONFFILE" ] && source "$CONFFILE"' 1
trap 'end_daemon' 0
trap 'end_daemon' 3
trap 'end_daemon' 15

# loop forever
# (avoid 'cat ..|while read .. ' due to subshell problems when running in background)
while :
do
   read line < "$CPKG_PIPE"
   if [ "$line" ] ; then
       $CPKG_BACKEND $line || true
   fi
done