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Top Forums Shell Programming and Scripting SH script to parse string and return multi-line file Post 302607918 by Alivadoro on Thursday 15th of March 2012 04:29:37 PM
Old 03-15-2012
Question SH script to parse string and return multi-line file

Hello all, I have been asked to exercise my shell scripting and it has been 10 plus years since I used to do it so I can not remember hardly anything and ask for your help.

What I need to do is copy a line out of a file that can be 10 to 100 characters long, I then need to parse this line into groups of ten and then each group of ten I need to convert them into the binary 1/0s.

So far I have been using the cut command but this is very dirty way of doing it and would like someone to kick start my memory Smilie

Code:
#!/bin/sh
K="/tmp/test1"
L="/tmp/test2"
M="/tmp/test3"
N="/tmp/test4"
Z="tmp/binStr"
grep -i -w ${USER1} ${a} | cut -d: -f2 >> $K
grep -i -w ${USER2} ${a} | cut -d: -f2 >> $L
\cp /tmp/TMP_MENU_$$ ${a}
cat $k | cut -c 1-10 >> $M
cat $K | cut -c 11-20 >> $M
cat $K | cut -c 21-30 >> $M
cat $K | cut -c 31-40 >> $M
cat $K | cut -c 41-50 >> $M
cat $K | cut -c 51-60 >> $M
cat $K | cut -c 61-70 >> $M
cat $K | cut -c 71-80 >> $M
cat $K | cut -c 81-90 >> $M
cat $K | cut -c 91-100 >> $M
echo "ibase=16;obase=2;<Please tell me I can use a Variable here?>" | bc >> $Z
#Then the same thing for $L >> $N

After I figure this out then the fun part happens, I have to do a logical OR against the two files and then convert the binary back to an integer and then put them back into 1 long string, but 1st things first. Any help is drastically appreciated.
 

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TRUNCATE(1)							   User Commands						       TRUNCATE(1)

NAME
truncate - shrink or extend the size of a file to the specified size SYNOPSIS
truncate OPTION... FILE... DESCRIPTION
Shrink or extend the size of each FILE to the specified size A FILE argument that does not exist is created. If a FILE is larger than the specified size, the extra data is lost. If a FILE is shorter, it is extended and the extended part (hole) reads as zero bytes. Mandatory arguments to long options are mandatory for short options too. -c, --no-create do not create any files -o, --io-blocks treat SIZE as number of IO blocks instead of bytes -r, --reference=RFILE base size on RFILE -s, --size=SIZE set or adjust the file size by SIZE bytes --help display this help and exit --version output version information and exit The SIZE argument is an integer and optional unit (example: 10K is 10*1024). Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,... (pow- ers of 1000). SIZE may also be prefixed by one of the following modifying characters: '+' extend by, '-' reduce by, '<' at most, '>' at least, '/' round down to multiple of, '%' round up to multiple of. AUTHOR
Written by Padraig Brady. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report truncate translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
dd(1), truncate(2), ftruncate(2) Full documentation at: <http://www.gnu.org/software/coreutils/truncate> or available locally via: info '(coreutils) truncate invocation' GNU coreutils 8.28 January 2018 TRUNCATE(1)
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