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Date: Sat, 5 Sep 2020 10:29:08 -0500
Message-ID: <CAOXR0FfRVspg7VCVH3zfvvY6E33JCcyuoU=b6nuvL1bYvFr2qA@mail.gmail.com>
Subject: Re: Is this a bug in bash?
To: Bob McGowan <ramjr0915@gmail.com>
From: Greg Borbonus via Cygwin <cygwin@cygwin.com>
Reply-To: Greg Borbonus <gregborbonus@gmail.com>
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Out of curiosity, why are there 2 different sets of quotes?

Thanks,
Greg Borbonus

On Fri, Sep 4, 2020, 10:23 PM Bob McGowan via Cygwin <cygwin@cygwin.com>
wrote:

> I am trying to set things up so the Bash profile detects if bash is
> running from the Windows "XWin Server" startup link or not. The startup
> link has the following as the command:
>
> C:\cygwin64\bin\run.exe --quote /usr/bin/bash.exe -l -c "cd; exec
> /usr/bin/startxwin"
>
> So I thought I'd try adding the env command to set an environment variable:
>
> C:\cygwin64\bin\run.exe --quote /usr/bin/env startxwin=yes
> /usr/bin/bash.exe -l -c "cd; exec /usr/bin/startxwin"
>
> This works (if there's a better way, I'd be happy to learn of it) but in
> the process of testing I had a problem when echo'ing the variable.
>
> For purposes of describing the bug, I simplified the command as follows:
>
>      env startup=yes bash -l -c 'echo "cmd:  $startup"'
>
> I also added an "echo profile: $startup" to the .bash_profile file.
>
> When I run the above in a Cygwin shell, the output is:
>
> $ env startup=yes bash -l -c "echo cmd: $startup"
> profile: yes
> $
>
> When I run it in a Linux shell, the output is:
>
> $ env startup=yes bash -l -c 'echo "cmd:  $startup"'
> profile: yes
> cmd:  yes
> $
>
> As you can see, the Cygwin side fails to generate any output from the -c
> echo command but on the Linux system there is output.
>
> Normally I'd call this a bug but since this is running under Windows it
> may be some weirdness of the implementation required to create the Linux
> like environment.
>
> The Bash version in Cygwin is  4.4.12(3)-release and for my Debian Linux
> system, it is 5.0.3(1)-release.  So it could also be that it existed in
> Linux 4.x series and has been fixed in the 5.x series.
>
> Bob
>
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