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Top Forums Shell Programming and Scripting Help needed in padding leading zeros Post 302210770 by jakSun8 on Tuesday 1st of July 2008 11:50:04 PM
Old 07-02-2008
How do i pad the hexadecimal values with leading zeroes

hex=`echo "obase=16;$data" | bc`
paddedData=`printf "%s" $hex `
echo $paddedData

results in
0
1
9
A

i want
00
01
09
0A

Any help is appreciated
JAK
 

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L2PING(8)						    Linux System Administration 						 L2PING(8)

NAME
l2ping - Send L2CAP echo request and receive answer SYNOPSIS
l2ping [-i <hciX>] [-s size] [-c count] [-t timeout] [-d delay] [-f] [-r] [-v] bd_addr DESCRIPTION
L2ping sends a L2CAP echo request to the Bluetooth MAC address bd_addr given in dotted hex notation. OPTIONS
-i <hciX> The command is applied to device hciX , which must be the name of an installed Bluetooth device (X = 0, 1, 2, ...) If not speci- fied, the command will be sent to the first available Bluetooth device. -s size The size of the data packets to be sent. -c count Send count number of packets then exit. -t timeout Wait timeout seconds for the response. -d delay Wait delay seconds between pings. -f Kind of flood ping. Use with care! It reduces the delay time between packets to 0. -r Reverse ping (gnip?). Send echo response instead of echo request. -v Verify response payload is identical to request payload. It is not required for remote stacks to return the request payload, but most stacks do (including Bluez). bd_addr The Bluetooth MAC address to be pinged in dotted hex notation like 01:02:03:ab:cd:ef or 01:EF:cd:aB:02:03 AUTHORS
Written by Maxim Krasnyansky <maxk@qualcomm.com> and Marcel Holtmann <marcel@holtmann.org> man page by Nils Faerber <nils@kernelconcepts.de>, Adam Laurie <adam@algroup.co.uk>. BlueZ Jan 22 2002 L2PING(8)
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