[OpenWrt-Devel] [Bug: Busybox 1.22.1] false return 0 instead of 1 with '--help' switch.

[Alive4Ever]

On Friday, August 29, 2014 02:08:56 PM Bastian Bittorf wrote:
> * Alive4ever <alive4ever at live.com> [29.08.2014 14:03]:
> > I'm using an embedded system with busybox v1.22.1, running Openwrt Chaos Chalmer r42321, mips24k AR9330
> > 
> > When I call 'busybox false --help', the return status is zero. I think it has nothing todo with openwrt, because it's the output of busybox, not the problem on openwrt performance. I feel it's strange, because GNU coreutils false binary gives return status 1, even when invoked with '--help' switch. I also notice that Ubuntu busybox false, which is version 1.21.1 performs the same behaviour as GNU coreutils.
> > 
> 
> i cannot see a bug here on OpenWrt:
> 
> root at box:~ busybox false --help
> BusyBox v1.22.1 (2014-08-28 18:55:30 EDT) multi-call binary.
> 
> Usage: false 
> 
> Return an exit code of FALSE (1)
> 
> root at box:~ echo $?
> 0
> root at box:~ false --help
> root at box:~ echo $?
> 1
> root at box:~ false bla
> root at box:~ echo $?
> 1
> 
> bye, bastian

Hi bastian,
If you are just typing false on openwrt shell, it uses false in the 
built in shell.

root at OpenWrt:~# type false
false is a shell builtin
root at OpenWrt:~# false --help
root at OpenWrt:~# echo $?
1
root at OpenWrt:~#

There is no problem with ash built in false. The problem is busybox 
false applet.
To invoke busybox false, either call '/bin/false' or '/bin/busybox false'

root at OpenWrt:~# /bin/false --help ; echo $?
BusyBox v1.22.1 (2014-08-28 15:20:07 WIB) multi-call binary.

Usage: false 

Return an exit code of FALSE (1)

0

root at OpenWrt:~# busybox false --help ; echo $?
BusyBox v1.22.1 (2014-08-28 15:20:07 WIB) multi-call binary.

Usage: false 

Return an exit code of FALSE (1)

0

That's the unexpected behavior from busybox false applet.
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