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Full Discussion: variables in shell
Top Forums Shell Programming and Scripting variables in shell Post 302172438 by joeyg on Monday 3rd of March 2008 05:04:17 PM
Old 03-03-2008
Hammer & Screwdriver Move the input file to < at end of loop

Loops are done as sub-processes. Maybe someone else can give all the details, but if you change from your "cat file" then "do" logic to simply "do" and "done <file" you should be fine.


Quote:
> cat sample.txt
line 1 apple
line 2 banana
line 3 carrot
Code:
> cat set_val
#! /bin/bash
# array usage
# do no cat the file to the read, rather do a 
#   while .... done<file

i_ct=0
while read text 
   do
   viko[$i_ct]=$text
   i_ct=$(( i_ct + 1 ))
done <sample.txt

echo ${#viko[*]}
echo ${viko[*]}
echo $i_ct

echo ${viko[1]}

 

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CAT(1)								   User Commands							    CAT(1)

NAME
cat - concatenate files and print on the standard output SYNOPSIS
cat [OPTION]... [FILE]... DESCRIPTION
Concatenate FILE(s), or standard input, to standard output. -A, --show-all equivalent to -vET -b, --number-nonblank number nonempty output lines, overrides -n -e equivalent to -vE -E, --show-ends display $ at end of each line -n, --number number all output lines -s, --squeeze-blank suppress repeated empty output lines -t equivalent to -vT -T, --show-tabs display TAB characters as ^I -u (ignored) -v, --show-nonprinting use ^ and M- notation, except for LFD and TAB --help display this help and exit --version output version information and exit With no FILE, or when FILE is -, read standard input. EXAMPLES
cat f - g Output f's contents, then standard input, then g's contents. cat Copy standard input to standard output. AUTHOR
Written by Torbjorn Granlund and Richard M. Stallman. REPORTING BUGS
Report cat bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> Report cat translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2011 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
tac(1) The full documentation for cat is maintained as a Texinfo manual. If the info and cat programs are properly installed at your site, the command info coreutils 'cat invocation' should give you access to the complete manual. GNU coreutils 8.12.197-032bb September 2011 CAT(1)
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