Busybox `xargs -I`- ignore empty lines

[Franciszek Koltuniuk]

Hi All,
 Please find in attachment a new patch that replace a fix for a bug :

"echo -n | xargs -I% echo %" would SEG

Commit:
https://git.busybox.net/busybox/commit/findutils/xargs.c?id=6d777b75ed322ea5ef0d1674ddfee1b5713cb04f

Currently available solution fixes SEGV issue, but the execution of
'xargs -I' behavior is different than the xargs from (GNU findutils).

Please see the example:
~$ cat ~/tmp/xargs-test
--- start file xargs-test ---

line number 2

line number 4


--- end file xargs-test ---

* output from xargs (GNU findutils) 4.7.0:

~$ cat ~/tmp/xargs-test | /usr/bin/xargs -I % echo %
line number 2
line number 4
~$

* output xargs from BusyBox v1.30.1 (Ubuntu 1:1.30.1-4ubuntu6.1)
multi-call binary):

~$ cat ~/tmp/xargs-test | busybox xargs -I % echo %echo %
~$

I thing that xargs from GNY findutils is expected. The patch:
 0001-busybox-xargs-I-ignore-empty-lines.patch
remove the changes within the commit
6d777b75ed322ea5ef0d1674ddfee1b5713cb04f and introduce new behavior -
empty lines are ignored.

Regards,
 Franciszek

-- 
Franciszek Koltuniuk
w:	consult.red <https://consult.red>
e:	franciszek.koltuniuk at consult.red
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