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.tjernlund@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