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Bourne Shell Extensions [was Re: shell scripting book]
- To: "Nadav Har'El" <nyh(at-nospam)math.technion.ac.il>
- Subject: Bourne Shell Extensions [was Re: shell scripting book]
- From: Shlomi Fish <shlomif(at-nospam)techst02.technion.ac.il>
- Date: Fri, 27 Jul 2001 07:30:02 +0300 (EEST)
- Cc: ILUG <linux-il(at-nospam)linux.org.il>
- Delivered-To: linux.org.il-linux-il@linux.org.il
- In-Reply-To: <20010726215404.C1072@leeor.math.technion.ac.il>
- Sender: linux-il-bounce(at-nospam)cs.huji.ac.il
As I found out, there are some features of all of ash, bash and zsh which
are not supported by the System Vish /bin/sh's. For instance, I noticed
that the $(sub-shell) output capture was not supported. AFAIK, $(...) was
introduced by the Korn Shell and some free Bourne shells copied it.
I am planning to give a lecture about Bourne shell programming to the
Haifa Linux Club. What I am going to do is to explain some extensions but
to clearly mention that they are not in the POSIX standard and that they
are not supported by ash and/or the System V'ish /bin/sh's.
Regards,
Shlomi Fish
----------------------------------------------------------------------
Shlomi Fish shlomif@t2.technion.ac.il
Home Page: http://t2.technion.ac.il/~shlomif/
Home E-mail: shlomif@techie.com
A more experienced programmer does not make less bugs. He just realizes
what went wrong more quickly.
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