[GRLUG] Bash split question, ..

[Don Ellis]

On Thu, May 26, 2011 at 2:35 PM, L. V. Lammert <lvl at omnitec.net> wrote:
> I'm thinking there must be a simple way to do this in bash, ..
>
> Starting with:
>
> mailq | grep MAILER | xargs postsuper -d  ___________--
>
> In perl it might be something like split (' ',$1), but it seems much simpler
> to use the built-in bash split (and more efficient since we would be doing
> thousands a night). Unfortunately, I cannot grok any docs that make any
> sense <g>!

I think you want cut, not split!

Not sure how to deal with the asterisk you mentioned.


Also, notice that Bash 3 (echo $BASH_VERSION) has regexes:

= = = = = = = = = = = = =
#!/bin/bash

variable="This is a fine mess."
echo "$variable"

# Regex matching with =~ operator within [[ double brackets ]].
if [[ "$variable" =~ T.........fin*es* ]]
# NOTE: As of version 3.2 of Bash, expression to match no longer quoted.
then
    echo "match found"
        # match found
fi
= = = = = = = = = = = = =

(Got that from Advanced Bash Scripting, a PDF) There are some other
goodies there as well.

--Don

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