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Subject: Re: alias appears to not work inside a called bash script
To: cygwin@cygwin.com
References: <000001d31acd$108b0340$31a109c0$@rogers.com> <CANnLRdgWnygyp36uYmpzq7i3BvgHonL5H8CPy_Vr+wOYmWjp4w@mail.gmail.com> <0ac245f1-002b-2993-c1de-e4ddaafa9c7d@cs.umass.edu> <CANnLRdgBU-Gact9rTN3cSYVy6UMe83r=EYyVsvwS97k8VuxD6g@mail.gmail.com> <99262820-ed21-d20d-8da0-2c0daa29f476@gmail.com> <772ae5e5-8ed7-76c4-6d4b-cf352504a8cc@cs.umass.edu> <78f5b6c2-c097-35bf-578d-6f3e45660e78@gmail.com>
From: cyg Simple <cygsimple@gmail.com>
Message-ID: <3b44c2b5-51a6-be9a-5732-a33d41a8bd6c@gmail.com>
Date: Tue, 22 Aug 2017 15:11:48 -0400
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On 8/22/2017 3:07 PM, cyg Simple wrote:
> On 8/22/2017 1:13 PM, Eliot Moss wrote:
>> On 8/22/2017 1:07 PM, cyg Simple wrote:
>>> On 8/22/2017 11:18 AM, Stephen John Smoogen wrote:
>>>> On 22 August 2017 at 10:47, Eliot Moss <moss@cs.umass.edu> wrote:
>>>>> On 8/22/2017 10:31 AM, Stephen John Smoogen wrote:
>>
>>> Are you talking bash as sh or bash as bash?  Bash as sh will expand
>>> those aliases.  But you should study
>>> http://tldp.org/LDP/abs/html/aliases.html for all your scripts.  Are
>>> there environment variables that could affect the outcome?
>>
>> Since the OP has a #! /bin/bash line at the top of his script, I think
>> he means bash.  However, running the script with sh explicitly does act
>> as you describe, e.g.:  sh myscript x y z ... in contrast to: myscript x
>> y z.
>>
> 
> There's also --posix and set -o posix which will cause bash to perform
> as the OP reports.  I'm guessing this to be used in the bash startup
> files in a global fashion on those systems that you're not having to
> specify to use aliases.
> 
> https://www.gnu.org/software/bash/manual/html_node/Bash-POSIX-Mode.html#Bash-POSIX-Mode
> 

And --enable-strict-posix-default configure option turns this setting on
by default.  I'll leave it up to the Cygwin maintainer to decide if it
should be used.

-- 
cyg Simple

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