Date: Thu, 28 Jun 2001 19:09:16 -0700 From: Dave Tweten <tweten@nas.nasa.gov> To: freebsd-doc@freebsd.org Subject: Fw: Re: Bourne Shell Syntax Wierdness Message-ID: <200106290209.f5T29Hu01819@gilmore.nas.nasa.gov>
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------- Forwarded Message
Date: Fri, 29 Jun 2001 03:03:44 +0100 (BST)
From: "Jonathan M. Slivko" <jslivko@jslivko.org>
To: Dave Tweten <tweten@nas.nasa.gov>
Subject: Re: Bourne Shell Syntax Wierdness
Dave,
You might want to send an e-mail to freebsd-doc@freebsd.org and ask them
if that's an error. If so, whats the correct syntax? -- Jonathan
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Jonathan Slivko -- Black Lotus Comm. -- jslivko@jslivko.org
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On Thu, 28 Jun 2001, Dave Tweten wrote:
> The sh man page says that the two operators "||" and "&&" have the same
> precedence. It also says that
>
> a || b
>
> means "execute b if a terminates abnormally" and
>
> a && b
>
> means "execute b if a terminates normally."
>
> So I don't understand why
>
> true || true && echo Oops!
>
> prints "Oops!"
>
> This is apparently not a bug in FreeBSD sh, because IRIX, IRIX64, and SunOS
> Bourne/Korn shells work the same way, but it certainly runs counter to my
> ability to read English and the contents of the man page.
>
> Incidently,
>
> true || { true && echo Oops! }
>
> prints nothing -- which I would have expected with or without the "{}".
>
> Can anybody explain this? Can that explanation go into the sh man page?
> Thank you for any help you can provide -- from someone who expects to see a
> large, hurried, white rabbit at any minute now.
> --
> M/S 258-5 | 1024-bit PGP fingerprint: | tweten@nas.nasa.gov
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