Re: GNU Parallel Bug Reports User .rc files interacting with parallel's sub shells

[Achim Gratz]

Ole Tange writes:
> $SHELL has a well-defined meaning: It is the login $SHELL.

The well defined meaning of the SHELL variable is what POSIX says:

--8<---------------cut here---------------start------------->8---
SHELL
    This variable shall represent a pathname of the user's preferred
    command language interpreter. If this interpreter does not conform
    to the Shell Command Language in XCU Shell Command Language,
    utilities may behave differently from those described in
    POSIX.1-2008.
--8<---------------cut here---------------end--------------->8---

Note it doesn't say anything about the login shell.  Yes, the login
shell assumes that the user prefers this shell and sets this variable to
itself.  But if the user changes it later, then there shouldn't be any
second guessing based on what the login shell was (this may not even be
under the users control).  And note the admonishment about shells that
don't confirm to POSIX: there are certain situations where you really
don't want SHELL to be set to tcsh or fish or whatever your non-POSIX
interactive shell currently or usually is.


Regards,
Achim.
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