tproxy

#!/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