Re: [PLUG] Splitting strings in bash

[Walt Mankowski via plug <plug@lists.phillylinux.org>]

I thought about doing the equivalent in Perl but neither will work
here since I want to be able to use $foo and $bar later on in the
shell script.

On Wed, Apr 26, 2023 at 04:04:20PM -0400, Will via plug wrote:
> aws '{print $2}' if you want the right piece. That's all I got.
> 
> On Wed, Apr 26, 2023 at 3:58 PM Carlos M. Fernández via plug <
> plug@lists.phillylinux.org> wrote:
> 
> > The first example with the pipe puts the read command in a subshell, and
> > that environment gets wiped out after the line is executed, taking the
> > updated variable values with it. The one with the here string doesn't,
> > allowing the read to modify the environment in the script.
> >
> >
> > On Wed, Apr 26, 2023, 15:46 Walt Mankowski via plug <
> > plug@lists.phillylinux.org> wrote:
> >
> >> Hi all,
> >>
> >> I've got a question about splitting strings in a bash shell
> >> script. Let's say I've got a string
> >>
> >> STR='dog cat'
> >>
> >> I'd like to split that on the space into two variables, foo and bar. I
> >> tried this
> >>
> >> echo $STR | read foo bar
> >>
> >> but it doesn't work. On the following line foo and bar are back to
> >> their original values. Then, after looking through the bash manpage
> >> for an alternative, I tried this instead
> >>
> >> read foo bar <<< $STR
> >>
> >> That DID work!
> >>
> >> So that solves my problem, but I'm still confused. Those two commands
> >> seem to me like they should be identical. Why doesn't the first one work?
> >>
> >> Walt
> >>
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> ___________________________________________________________________________
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