Add a helper routine for opening a directory that is restricted to being
used for opening relative files as stdio streams.
I think this will really help basic adaptation of multi-file programs to
Capsicum. Rather than having each program initialize a rights object and
ioctl/fcntl arrays for their root fd for relative opens, consolidate in the
logical place.
Reviewed by: oshogbo@
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D8743
Squash EBADF from closed stdin, stdout, or stderr in caph_limit_stdio().
Any program used during special shell scripts may commonly be forked
from a parent process with closed standard stream. Do the common sense
thing for this common use.
Reported by: Iblis Lin <iblis AT hs.ntnu.edu.tw>
Reviewed by: oshogbo@ (earlier version)
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D8657
Capsicum helpers are a set of inline functions which goal is to reduce
duplicated patterns used to Capsicumize applications.
Reviewed by: cem, AllanJude, bapt, ed, emaste
Differential Revision: https://reviews.freebsd.org/D8013
