Date: Thu, 28 Jun 2001 18:44:54 -0700 From: Dave Tweten <tweten@nas.nasa.gov> To: freebsd-questions@freebsd.org Subject: Bourne Shell Syntax Wierdness Message-ID: <200106290144.f5T1itu01729@gilmore.nas.nasa.gov>
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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.
--
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