Gsoc weekly status #2:capsicumizing base system

Hello,
Previous week,I come up with ways to test the nonblocking bahavior on
wall(1),and I am too optimistic on my progress on my previous application
wall(1).last week I got some misunderstanding on the process of
capsicumizing an application,so I have to discuss with mentor more,and the
code might need more rewrite.
In the last patch,I used clang-format to format my code,however,the tool
done too much on formatting,because it is a legacy application,however I
didnt expect such result.my mentor adviced me to roll back the change,I
will fix it in next patch.
    This week I learned how to debug with gdb and will fix the problem from
libc system call in wall() because many of these system call in libc
contains system calls that is not permitted in capability mode.
complete work:
test method of wall(1)
next work:
recapsicumize wall(1)
reupload the wall application to phabricator
start capsicumize tftpd(8) if possible

Regards
Hans Lu