#!/bin/sh

if [ ! -c /dev/vcs ]; then
    mknod /dev/vcs c 7 0
fi

cat >/tmp/foo.sh <<EOF
#!/bin/sh

#
#  If no arguments:
#
#     1) Start child process to connect as client to master, and re-execute this script to send
#        "installmonitor" to master.  Do not wait for child process.
#
#     2) Loop forever.  For each iteration, start child process as server waiting for a client
#        connection.  Once a connection is established, child process re-executes this script to
#        handle request from that particular client.
#

if [ \$# -eq 0 ]; then
    xcatdhost="#XCATVAR:XCATMASTER#"
    xcatdport="#TABLE:site:key=xcatiport:value#"

    /usr/bin/nc "\$xcatdhost" "\$xcatdport" -e /tmp/foo.sh install_monitor &

    while true; do
        /usr/bin/nc -l -p 3001 -e /tmp/foo.sh serve_client
    done

    exit 1                        # never reached; reboot ends this
fi

#
#  If the script was called with the "install_monitor" argument, stdin and stdout are
#  connected to an xCAT daemon on the master.  Write the "installmonitor" request to the
#  daemon.
#

if [ "\$1" = "install_monitor" ]; then
    cmd=""
    while [ "\$cmd" != "done" ]; do
        read cmd remainder
    
        if [ "\$cmd" == "ready" ]; then
            echo "installmonitor"
        fi
    done

    exit 0
fi

#
#  When execution reaches here, script called with "serve_client" argument, which means
#  stdin and stdout are connected to a client.  Read the request from the client, provide
#  the answer to the client, and terminate.
#

read cmd arg remainder

case "\$cmd" in
#   "sh")                        #TODO: ENABLE IF DEBUG
#       output=\$(eval \$arg \$remainder)
#       echo "\$output"
#       echo "EOO"
#       ;;

    "screendump")
        output=\$(eval chvt \$arg; cat /dev/vcs)
        echo "\$output"
        ;;

    "stat")
        sedcmds='/^[^ ]+ +[^ ]+ +install /h; \${ g; s,^[^ ]+ +[^ ]+ +install +([^ ]+) +[^ ]+ ([^ ]+).*,installing \1 \2,; p }'
        output=\$(sed -nre "\$sedcmds" /target/var/log/dpkg.log 2>/dev/null)

        if [ -z "\$output" ]; then
            output="installing prep"
        fi

        echo "\$output"
        ;;
esac

exit 0
EOF

chmod 755 /tmp/foo.sh

/tmp/foo.sh >/tmp/foo.log 2>&1 &

exit 0