Re: [PATCH] Shell utilities: Guard against expr' magic tokens.

Mark Wooding [off-list ref] writes:

From: Mark Wooding <redacted>

Some words, e.g., `match', are special to expr(1), and cause strange
parsing effects.  Track down all uses of expr and mangle the arguments
so that this isn't a problem.

Gaaaaaaaaaah.  

    http://www.opengroup.org/onlinepubs/009695399/utilities/expr.html

says use of length, substr, index, match as string arguments
produces unspecified results, so obviously the program was
wrong.

Thanks.