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Subject: Re: #!/bin/sh vs #!/bin/bash filename expansion after <
To: =?UTF-8?Q?Morten_Kj=c3=a6rulff?= <mortenkjarulff@gmail.com>,
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From: Eliot Moss <moss@cs.umass.edu>
Message-ID: <3d0b9130-0df1-744a-1693-4bfff4686375@cs.umass.edu>
Date: Wed, 12 Aug 2020 14:24:17 -0400
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On 8/12/2020 1:54 PM, Morten Kjærulff via Cygwin wrote:
> Hi,
> 
> This script:
> 
> #!/bin/sh
> echo hello >hello.txt
> ls -l
> cat hell*
> cat < hell*
> 
> gives me:
> 
> $ ./t.sh
> total 2
> -rw-r--r-- 1 vp01mkf Domain Users  6 Aug 12 19:51 hello.txt
> -rwxr-xr-x 1 vp01mkf Domain Users 60 Aug 12 19:51 t.sh
> hello
> ./t.sh: line 5: hell*: No such file or directory
> 
> But if I change line1 to
> #!/bin/bash
> I get
> hello
> hello
> 
> Is that correct behaviour. I guess so, but why? And what is the rule?

The bash man page describes how its behavior is different when run as sh vs bash :-) ... EM