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Full Discussion: Please complete this program.
Top Forums Shell Programming and Scripting Please complete this program. Post 302158479 by sridhusha on Tuesday 15th of January 2008 12:38:03 PM
Old 01-15-2008
Please complete this program.
Hi All,

I need some help to complete the below script, after executing below script blank lines are coming, but i am expecting 4 digit numeric no. Please solve the issue ASAP.


Code:
function portno
{
while (true)
do
random=`echo $RANDOM | cut -c 1-4`
port=`netstat -a | grep -c $random`

if [ $port -ne 1 ];
then
        break
else
        continue
fi
done
return $port
}

port1=`portno`
port2=`portno`

echo "$port1"
echo "$port2"

Thanks in advance...

Regards,
Sridhar.
Last edited by blowtorch; 01-15-2008 at 08:24 PM.. Reason: code tags
 

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LEARN ABOUT NETBSD

ucom

UCOM(4) 						   BSD Kernel Interfaces Manual 						   UCOM(4)

NAME

     ucom -- USB tty support

SYNOPSIS

     ucom* at ubsa?
     ucom* at uchcom?
     ucom* at uftdi?
     ucom* at ugensa?
     ucom* at uhmodem?
     ucom* at uipaq?
     ucom* at ukyopon?
     ucom* at umct?
     ucom* at umodem?
     ucom* at uplcom?
     ucom* at uslsa?
     ucom* at uvisor? portno ?
     ucom* at uvscom?

DESCRIPTION

     The ucom driver attaches to USB modems, serial ports, and other devices that need to look like a tty.  The ucom driver shows a behaviour like
     a tty(4).	This means that normal programs such as tip(1) or pppd(8) can be used to access the device.

     The portno locator can be used to decide which port to use for device that have multiple external ports.

FILES

     /dev/dtyU?

     /dev/ttyU?

SEE ALSO

     tty(4), ubsa(4), uchcom(4), uftdi(4), ugensa(4), uhmodem(4), uipaq(4), ukyopon(4), umct(4), umodem(4), uplcom(4), usb(4), uslsa(4),
     uvisor(4), uvscom(4)

HISTORY

     The ucom driver appeared in NetBSD 1.5.

BSD
								 December 16, 2009							       BSD
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