Dear Joe Hershberger,
On 04/28/2015 11:00 AM, Joe Hershberger wrote:
Hi Joakim,
On Mon, Apr 27, 2015 at 8:39 AM, Joakim Tjernlund
<joakim.tjernl...@transmode.se> wrote:
Trying to get a better handle of HUSH shell expressions, this does not work as
I expect:
=> false && true || echo ECHO
=> false && false || echo ECHO
none prints ECHO, seems like a bug?
I think it works as it should. false followed by && will terminate always.
This the only one that prints ECHO
= true && false || echo ECHO
This also seems correct. Passing true into && and false into || will
always continue.
I thought hush is supposed to be mostly similar to sh. On my Linux
desktop, bash (which is supposed to be backward compatible with sh) says
$ which sh
/usr/bin/sh
$ ls -l /usr/bin/sh
lrwxrwxrwx 1 root root 4 Apr 17 14:43 /usr/bin/sh -> bash
$ sh --version
GNU bash, version 4.2.46(1)-release (x86_64-redhat-linux-gnu)
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
$ sh
sh-4.2$ false && true || echo ECHO
ECHO
sh-4.2$ false && false || echo ECHO
ECHO
sh-4.2$ true && false || echo ECHO
ECHO
sh-4.2$ exit
exit
Is this one of the places where hush and sh are not the same?
Regards,
Jim
--
Jim Chargin
AJA Video Systems j...@aja.com
(530) 271-3334 http://www.aja.com
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