tinyproxy-startup-script

#!/bin/bash

PIDFILE="/home/provproxy/tinyproxy.pid"
TINYPROXYCMD="/usr/sbin/tinyproxy"
PIDVAL=0
WTIMEOUT=30
OK=0

CH_S[0]='-' #pseudographic items
CH_S[1]='/'
CH_S[2]='|'
CH_S[3]='\'
ITEM_ARR=0 #current item counter


process_status()
{
    #poluchaem PID
    if [ -e $PIDFILE ];then #esli file exist
    PIDVAL=`cat $PIDFILE` #chitaem PID
    TMPGREP=`ps -p $PIDVAL|grep "tinyproxy" -c` #esli process zapushen db 1 inache 0
    if [ $TMPGREP -ge 1 ];then #process zapushen
        return
    else #pid-file levyi
        rm $PIDFILE
    fi
    fi
    PIDVAL=0
    return
}

status_proxy()
{
    process_status
    if [ $PIDVAL -eq 0 ]; then
    echo "Tinyproxy not running"
    else
    echo "Tinyproxy running [PID=$PIDVAL]"
    fi
}

start_proxy()
{
    process_status
    if [ "$PIDVAL" -ne 0  ]; then
    echo "Tinyproxy already work! [$PIDVAL]"
    return 1
    fi
    $TINYPROXYCMD

    RETCODE=$?
    if [ "$RETCODE" -ne 0 ]; then
    echo "Not starting (code $RETCODE)"
    return 1
    fi

    echo -n "Starting proxy ("$WTIMEOUT" secounds): "
    tput sc #save cursor position

    while [ $WTIMEOUT -ge 0 ]; do

    #print timeout and current pseudographic char
    printf '%3s %s' $WTIMEOUT ${CH_S[ITEM_ARR]}
    tput rc #restore cursor position
    sleep 1
    process_status
    if [ $PIDVAL -ne 0 ]; then #zapustili
            OK=1
            break
    fi


    #decrease timeout and increase current item ctr.
    let "WTIMEOUT=WTIMEOUT-1"
    let "ITEM_ARR=ITEM_ARR+1"

    if [ $ITEM_ARR -eq 4 ];then
        #if items ctr > number of array items
        #starting with 0 item
        let "ITEM_ARR=0"
    fi

    done

    #next message starting with new string
    printf '\n'

    if [ "$OK" -eq 1 ]; then
    echo "Started [$PIDVAL]"
    else
    echo "Not started :("
    fi
}

stop_proxy()
{
    process_status
    if [ $PIDVAL -eq 0 ]; then
    echo "Tinyproxy not work!"
    return 1
    fi

    echo -n "Stopping proxy [$PIDVAL] in $WTIMEOUT secounds: "

    tput sc #save cursor position

    while [ $WTIMEOUT -ge 0 ]; do

    #print timeout and current pseudographic char
    printf '%3s %s' $WTIMEOUT ${CH_S[ITEM_ARR]}
    tput rc #restore cursor position
    kill $PIDVAL
    sleep 1
    process_status
    if [ $PIDVAL -eq 0 ]; then #ubit
        OK=1
        break
    fi


    #decrease timeout and increase current item ctr.
    let "WTIMEOUT=WTIMEOUT-1"
    let "ITEM_ARR=ITEM_ARR+1"

    if [ $ITEM_ARR -eq 4 ];then
        #if items ctr > number of array items
        #starting with 0 item
        let "ITEM_ARR=0"
    fi

    done

    #next message starting with new string
    printf '\n'

    if [ "$OK" -eq 1 ]; then
    echo "Stopped!"
    else
    echo "Not stopped :("
    fi
}

restart_proxy()
{
    stop_proxy
    OK=0
    start_proxy
}

case "$1" in
    start)
    start_proxy
    ;;
    stop)
    stop_proxy
    ;;
    restart)
    restart_proxy
    ;;
    status)
    status_proxy
    ;;
    *)
    echo "Usage: $0 {start|stop|restart|status}"
esac