On Tue, Jan 04, 2011 at 09:43:12AM -0500, Vallon, Justin wrote:
quoted text
>  # "exec" commands are ran with the user shell by default, but this may
>  # be non-POSIX. For example, if SHELL=zsh then ">file" doesn't work
>  # to create a file. Unseting SHELL avoids such non-portable behavior
> 
> Perl's exec and system do not use SHELL (as far as perlfunc states).  It uses
> /bin/sh -c "$cmd", or a platform-dependent equivalent.
> 
> $SHELL is typically only used when a program wants to invoke a user-shell
> (ie: editor shell-escape, xterm, typescript, screen).
> 
> How was SHELL=/bin/false causing problems?  Is git using $SHELL?
git-rebase--interactive.sh:
====
${SHELL:-@SHELL_PATH@} -c "$rest" # Actual execution
status=$?
if test "$status" -ne 0
then
	warn "Execution failed: $rest"
====

This always triggers with SHELL=/bin/false if SHELL is unset or empty,
SHELL_PATH gets substituted, which tends to be the correct /bin/sh.

-- 
Robin Hugh Johnson
Gentoo Linux: Developer, Trustee & Infrastructure Lead
E-Mail     : robbat2@gentoo.org
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