smart question Post: 76800

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Top Forums UNIX for Advanced & Expert Users smart question Post 76800 by jerardfjay on Thursday 30th of June 2005 03:46:49 PM

06-30-2005

Registered User

assuming your input file is in_file. You could code something like this

Code:

#! /usr/bin/ksh

size=$(wc -c in_file | awk -F " " '{print $1}')
half_size=`expr $size / 2`
split -b $half_size in_file

The result of the final split command will be two or three files name xaa, xab and xac. you will get two files if the in_file is even number in size else three files with the last file xac being just 1 byte.
If you wanted the first half just read xaa, else read xab and xac if available for the latter.

jerardfjay

Last edited by jerardfjay; 06-30-2005 at 04:48 PM.. Reason: more explanation

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LEARN ABOUT SUSE

atr_analysis

ATR_ANALYSIS(1p)						   User Commands						  ATR_ANALYSIS(1p)

NAME

       ATR_analysis - analyse a smart card ATR

SYNOPSIS

       ATR_analysis [ATRstring]

DESCRIPTION

       ATR_analysis is used to parse the ATR (Answer To Reset) sent by a smart card.

       The command also tries to find the card model using an ATR database stored in a text file smartcard_list.txt.

       The smartcard_list.txt file is searched in ./, /usr/local/pcsc/ and /usr/share/pcsc/ directories.

       Exemple:
	$ ATR_analysis '3B A7 00 40 18 80 65 A2 08 01 01 52'
	ATR: 3B A7 00 40 18 80 65 A2 08 01 01 52
	+ TS = 3B --> Direct Convention
	+ T0 = A7, Y(1): 1010, K: 7 (historical bytes)
	  TB(1) = 00 --> Programming Param P: 0, I: 0
	  TD(1) = 40 --> Y(i+1) = 0100, Protocol T = 0
	-----
	  TC(2) = 18 --> Work waiting time: 960 x 24 x (Fi/F)
	+ Historical bytes: 80 65 A2 08 01 01 52

	Possibly identified card:
	3B A7 00 40 18 80 65 A2 08 01 01 52
	       Gemplus GPK8000

BUGS

       Maybe many bugs since I am not a ISO 7816 expert.

FILES

       smartcard_list.txt

SEE ALSO

       pcscd(8), pcsc_scan(1)

AUTHOR

       Ludovic Rousseau <ludovic.rousseau@free.fr>

Version: 1.3							   October 2005 						  ATR_ANALYSIS(1p)