Russ's patch is no good, at least, it does not address the problems I have raised in the past.
A Posix shell is allowed to have a builtin for ANY command without restriction, and as long as the builtin has the behavior specified by Posix for that command, it is a "Posix compatible shell." For example, a "Posix compatible shell" can have a builtin called "ldconfig" which does something totally different from Debian's ldconfig, because there is no required behavior for ldconfig according to Posix. Requiring that shell scripts work on any "Posix compatible shell" would require changing every one of the hundreds of packages which currently call ldconfig without specifying a path. I have proposed as an alternative that we say that a shell is suitable for Debian's /bin/sh if its builtins behave just as do the Debian programs installed in the standard paths, and then we can make a specific set of exceptions for builtins that we don't care if they behave the same way as Debian's versions. Thomas
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