Re: alias appears to not work inside a called bash script
- Date: Tue, 22 Aug 2017 11:18:55 -0400
- From: Stephen John Smoogen <smooge@xxxxxxxxx>
- Subject: Re: alias appears to not work inside a called bash script
On 22 August 2017 at 10:47, Eliot Moss <moss@xxxxxxxxxxxx> wrote:
> On 8/22/2017 10:31 AM, Stephen John Smoogen wrote:
>> I replicated this problem on my system and found that the fix is to add a
>> shopt -s expand_aliases
>> at the top of the script. I don't know why the option is turned off
>> when running scripts versus in a plain script but that seems to be a
>> default in Cygwin.
> It's a *bash* default - it has nothing to do with Cygwin as distinct
> from other bash installations. If you had a different experience
> elsewhere, it could be that the default was overridden in some system
> wide bashrc file - but that strikes me as unlikely. I suspect that
> this is done as a security measure, to prevent an alias from introducing
> a surprise.
I checked on CentOS and there is no shopt option set in any of the
/etc/ files. It must be a compiled in default of some sort as EL6 and
EL7 both work without an explicit `shopt -s expand_aliases`. I then
tried on an Ubuntu 16.04 system and it works without the `shopt -s
I didn't have access to anything else at the moment so I can't say
which other systems might actually follow the default other than
Cygwin at the moment.
> Regards - EM
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Stephen J Smoogen.
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