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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ZGREP(1) General Commands Manual ZGREP(1)
NAME
zgrep - search possibly compressed files for a regular expression
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename...
DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code:
(-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the
standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep.
If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.
EXIT CODE
2 - An option that is not supported was specified.
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)
ZGREP(1)