Shell Programming and Scripting

tar zcvf $Bckp_Dir/$Box-BaseBackup-$Day.tar.gz * --exclude 'dbserver_logs/*' --exclude postmaster.pid  --exclude 'pg_xlog/*'

#!/usr/bin/env ksh

# function that does work to be monitored.  when it is finished
# it deletes the marker file passed as $1
function runme
{
    # tar command would go here
    # some dummy work for easy testing instead of tar command
    typeset i=0
    while (( $i < 50 ))
    do
        ps -elf >> /tmp/out
        i=$(( $i + 1 ))
        sleep 1
    done
    # end of dummy work

    rm $1       # remove marker to indicate done
}

# function to monitor and report every few seconds to the tty
function watch
{
    printf "started watching: %s\n" "$(date)"
    while [[ -f $1 ]]     # keep watching until runme removes the marker ($1)
    do
        # replace /tmp/out with your filename, or pass filename in (better)
        ls -hl /tmp/out | read junk junk junk junk size junk    # WARNING: not bash friendly
        printf "%s: cur size: %-10s\r" "$(date)" "$size"
        sleep 2
    done

    printf "\n"
}

marker=/tmp/marker          # watch function loops until this is gone
>$marker                    # create it
runme $marker &             # start function to do work
watch $marker               # update progress until done

#!/bin/ksh or bash or dash or ...

someecho()
{
while true
do
           somestring=$(date '+%H%M%S')
           printf "\r%s                   \r" $somestring
           sleep 2
done
}

somesubprocess()
{
        # tar or ... sleep is nice test command ...
        sleep 20
}

#
    somesubprocess &  # start process
    childPID=$!            # just startrd process id
    someecho &           # some echo process
    echoPID=$!

    echo "child:$childPID"
    wait $childPID        # and then we wait process ending
    kill $echoPID          # and kill echo process
    echo
    echo done