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Top Forums Shell Programming and Scripting How to avoid multiple while loop? Post 302279857 by Franklin52 on Saturday 24th of January 2009 09:09:11 AM
Old 01-24-2009
To avoid the use of cat, use the read statements as follow:

Code:
while IFS= read -r line
do
  #
  # do your stuff with "$line"
  #
done < FILE

Regards
 

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CAT(1)									FSF								    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 nonblank output lines -e equivalent to -vE -E, --show-ends display $ at end of each line -n, --number number all output lines -s, --squeeze-blank never more than one single blank line -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. AUTHOR
Written by Torbjorn Granlund and Richard M. Stallman. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
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 cat should give you access to the complete manual. cat (coreutils) 4.5.3 February 2003 CAT(1)
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