On Sat, Jul 15, 2017 at 02:59:41AM +0700, Robert Elz wrote: > IMO, if SHELL gets unset (it is usually initialised by login, or its > equivalent), it should simply stay unset, and not be set to anything, > until some user (or script) decides to set it again.
wooledg:~$ unset SHELL wooledg:~$ bash -c 'echo "$SHELL"' /bin/bash wooledg:~$ ksh -c 'echo "$SHELL"' /bin/sh wooledg:~$ zsh -c 'echo "$SHELL"' wooledg:~$ tcsh -c 'echo "$SHELL"' SHELL: Undefined variable. Looks like there's not much agreement here.
