On 12/22/11 9:24 PM, Peng Yu wrote:

> "If no arguments follow this option, then the positional parameters $@
> are unset.  Otherwise, the positional parameters $@ are set to the
> args, even if some of them begin with a -."

Not to put *too* fine a point on it, but this is completely wrong.  You
appear to be throwing `$@' in there randomly because you want to search
for that string.

The name of the parameter is `@', just as the name of the HOME environment
variable is `HOME'.  It's value is dynamic -- the current set of
positional parameters.  You use `$@' to dereference it.

Look at
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_05_01
for more information.
-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    c...@case.edu    http://cnswww.cns.cwru.edu/~chet/

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