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Re: alias appears to not work inside a called bash script

On 8/22/2017 11:18 AM, Stephen John Smoogen wrote:
> On 22 August 2017 at 10:47, Eliot Moss <> 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
> expand_aliases` also.
> 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.

Are you talking bash as sh or bash as bash?  Bash as sh will expand
those aliases.  But you should study for all your scripts.  Are
there environment variables that could affect the outcome?

cyg Simple

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