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Top Forums UNIX for Dummies Questions & Answers While read issue... Post 302173858 by ghostdog74 on Saturday 8th of March 2008 12:11:56 PM
Old 03-08-2008
Quote:
Originally Posted by giannicello
I think I saw another post where someone said he an issue with a 'while within a while' but there were no solutions on it.

I have an input file of data columns separated by pipes "|" and I want to set each column to a variable and do something with it. This I can do.

When I get to a certain row of a certain value, I want to take a subset (i.e. grep for a certain key) of all rows from the same input file and do another while statement, but for some reason or other, the second while only runs once and it breaks back out to first while. This is just pseudo code:

while read a b c ; do
a=s/thing
b=s/thing
c=s/thing
if a=somethingspecial then
grep "somethingiwant" myinputfile > anewfile
while read a b c; do
a1=s/thing
b1=s/thing
c1=s/thing
do something as many times as grep found the key
done <anewfile
fi
done < myinputfile

The problem is that the inner while runs once even though I may have say, 20 rows to process. Any thoughts?

Thank you.
Gianni
see the red fonts. they are the same. try naming them differently
 

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set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

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Version 1.23.1							  Sun Jan 8 2012						      set_color(1)
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