On Feb 24, 2010, at 05:19 , Roman Cheplyaka wrote:
Well, this agrees with POSIX. So still I don't see the difference
between "$@" and ${1+"$@"}.


The difference is that Unix /bin/sh predates POSIX, and on systems that usefully support a notion of backward compatibility (nostly commercial, because (1) they have installed user bases that predate POSIX and (2) they actually think it's worthwhile to support said user bases) /bin/sh uses the traditional behavior that "$@" expands to "" if there are no arguments. (This is "stupid" but consistent, another concept that seems to have been thrown to the wolves.)

--
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allb...@kf8nh.com
system administrator [openafs,heimdal,too many hats] allb...@ece.cmu.edu
electrical and computer engineering, carnegie mellon university    KF8NH


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