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Full Discussion: global variable not holding its value?
Top Forums Shell Programming and Scripting global variable not holding its value? Post 302268922 by Autocross.US on Tuesday 16th of December 2008 02:28:03 PM
Old 12-16-2008
Ok, appears that the while loop using a pipe was also a subshell, so that was the problem.

Code:
#! /bin/bash
TO=1

for i in key1 key2 ; do
  TO=0

  for FILE in $(grep $i ./filelist); do
    let TO=$(( ${TO} + `cat $FILE|wc -l` ))
    echo "total number of lines in file whose name containing $i increased to ${TO}"
  done


  echo "total number of lines in file whose name containing $i finally equal to ${TO}"
done

this prints:
Code:
total number of lines in file whose name containing key1 increased to 3
total number of lines in file whose name containing key1 increased to 8
total number of lines in file whose name containing key1 finally equal to 8
total number of lines in file whose name containing key2 increased to 2
total number of lines in file whose name containing key2 increased to 11
total number of lines in file whose name containing key2 finally equal to 11


Edit: looks like someone found the fix before me.
 

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LEARN ABOUT DEBIAN

deb-split

deb-split(5)							      Debian							      deb-split(5)

NAME

       deb-split - Debian multi-part binary package format

SYNOPSIS

       filename.deb

DESCRIPTION

       The multi-part .deb format is used to split big packages into smaller pieces to ease transport in small media.

FORMAT

       The file is an ar archive with a magic value of !<arch>.  The file names might contain a trailing slash (since dpkg 1.15.6).

       The first member is named debian-split and contains a series of lines, separated by newlines. Currently eight lines are present:

       o   The format version number, 2.1 at the time this manual page was written.

       o   The package name.

       o   The package version.

       o   The md5sum of the package.

       o   The total size of the package.

       o   The maximum part size.

       o   The current part number, followed by a slash and the total amount of parts (as in '1/10').

       o   The package architecture (since dpkg 1.16.1).

       Programs  which	read multi-part archives should be prepared for the minor format version number to be increased and additional lines to be
       present, and should ignore these if this is the case.

       If the major format version number has changed, an incompatible change has been made and the program should stop. If it has not,  then  the
       program	should	be  able  to  safely  continue, unless it encounters an unexpected member in the archive (except at the end), as described
       below.

       The second, last required member is named data.N, where N denotes the part number. It contains the raw part data.

       These members must occur in this exact order. Current implementations should ignore any additional members after data.N.   Further  members
       may be defined in the future, and (if possible) will be placed after these two.

SEE ALSO

       deb(5), dpkg-split(1).

Debian Project							    2012-04-09							      deb-split(5)
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