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Re: test for "command not found" before expanding shell parameters
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From: |
Toralf Förster |
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Subject: |
Re: test for "command not found" before expanding shell parameters |
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Date: |
Sun, 20 Apr 2014 20:05:08 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 |
On 04/20/2014 07:58 PM, Alan Young wrote:
> greo=$(command -v greo)
>
> if [ -n $greo ]; then
> $greo ...
> fi
>
> command will search the directories defined in $PATH for the command
> greo and return the fully qualified path. If it isn't found it will
> return null. So, if $greo is non-zero, greo exists and you can run
> it.
If "greo" does not exist - will bash in that case expand /var/db/pkg/*/*/USE
neverttheless ?
--
Toralf