bourne sh, problems with var setting in case/esac

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In article <1236 at netmuc.UUCP> bothe at net7.uucp writes:

>if i don't pipe esac and not use cat, all is ok, but i want to pipe !

In the immortal words of Guy Harris (or is that the words of the immortal
Guy Harris? :-):

	``You've been zapped by Mr. Subshell''

Sh runs control structures with pipes in a subshell.  Variables set in a
subshell cannot affect the parent's settings.

Chet
-- 
Chet Ramey				``I die, Horatio''
Network Services Group, Case Western Reserve University
chet at ins.CWRU.Edu
                My opinions are just those, and mine alone.