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Date: Sat, 18 Jul 2009 18:39:35 +0200 (CEST)
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From: Oliver Fromme <olli@lurza.secnetix.de>
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Subject: Re: Bourne shell short-circuit operators improperly documented
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Actually I've never regarded "&&" and "||" (and also "|"
and "&") as operators, like real operators in a programming
language, but as command separators, much like ";", but
with special semantics.

Note that

   foo && bar && baz
   foo || bar || baz

is the same as

   if foo; then if bar; then baz; fi; fi
   if ! foo; then if ! bar; then baz; fi; fi

Best regards
   Oliver

-- 
Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M.
Handelsregister: Registergericht Muenchen, HRA 74606,  Geschäftsfuehrung:
secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün-
chen, HRB 125758,  Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart

FreeBSD-Dienstleistungen, -Produkte und mehr:  http://www.secnetix.de/bsd

"If you aim the gun at your foot and pull the trigger, it's
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where you aimed the gun (in this case, Mr. Foot)."
        -- Terry Lambert, FreeBSD-hackers mailing list.