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Re: Tilde expansion during command search

From: Eric Blake
Subject: Re: Tilde expansion during command search
Date: Wed, 23 Jul 2014 07:58:26 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0

On 07/23/2014 07:51 AM, Dan Douglas wrote:
> On Wednesday, July 23, 2014 09:28:02 AM you wrote:
>> On 7/23/14, 8:22 AM, Dan Douglas wrote:
>>> Hi, from this discussion:
>>> https://github.com/koalaman/shellcheck/issues/195#issuecomment-49678200
>>> I can't find any reference that says substituting a literal tilde in PATH 
>>> should occur during command search.
>> Bash has always done this, even back to the pre-version 1 days, and I don't
>> see any reason to change it now.
> The only concerns I can think of are inconsistency with programs that use 
> execvp(), or possibly double-expansion in the event of a user name or any 
> path 
> containing ~.
> You're probably right in that it's not super critical if it hasn't caused 
> problems so far.

Might be worth asking the POSIX folks if it is allowed by POSIX.  What
do other shells do?

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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