Prefer setvbuf() to setlinebuf() for portability.
Some style(9) and redundant tests for NULL.
These are only meant to ease up merging newer changes but we are skipping
changes done in order to accomodate OpenBSD's pledge support.
Obtained from: OpenBSD
MFC after: 2 weeks
Trivially capsicumize some simple programs that just interact with
stdio. This list of programs uses 'pledge("stdio")' in OpenBSD.
No objection from: allanjude, emaste, oshogbo
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D8307
compatibility level with the GNU counterparts and have shown to be mature
enough. For now, the GNU versions aren't removed from the tree, just detached
from the build.
Sponsored by: Google Summer of Code 2008
Portbuild run by: erwin
Approved by: delphij
