Re: bash: variables inside 'while'

[Paul Jarc]

This belongs on bash-bug.  Followup-To and Mail-Followup-To set.

zach@cs.uni-bonn.de (Gabriel Zachmann) wrote:
>     cat file |
>     while read p l
>     do
>         xx=$p
>         echo xx=$xx
>         break
>     done
>     echo xx=$xx

This is related to entry E4 in the bash FAQ.  Each element of a
pipeline is run in a separate process, so variable settings are in
effect only within that element.  Try this:
  cat file | { while read p l; do ...; done; echo xx=$xx; }
Or this:
  while read p l; do ...; done < file; echo xx=$xx
(but that will still break on some other sh'es.)


paul