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Piped Variable Scoping In The Linux Or Unix Shell

Jun 09, 2008, 06:00 (1 Talkback[s])
(Other stories by Mike Tremell)

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[ Thanks to Mike Golvach for this link. ]

"Today we're going to look at variable scoping within a piped-while-loop in a few Linux and Unix shells. We're actually almost at this point in our series of ongoing posts regarding bash, Perl and awk porting.

"Probably the most interesting thing about zsh (and shells that share its characteristic, in this sense) is that the scope of variables passed through a pipe is slightly different than in other shells, like bash and ksh (Note that not all vendor's versions are equal even if they have the same name...!)"

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