seekdir_basic: fix various Coverity issues

Address..
- .. resource leaks of file descriptors and memory
- .. unchecked return values from creat(2), mkdir(2), and telldir(3)
- .. potential NULL deref

seekdir_basic: fix various Coverity issues

Address..
- .. resource leaks of file descriptors and memory
- .. unchecked return values from creat(2), mkdir(2), and telldir(3)
- .. potential NULL derefs after calling readdir(3)

MFC after: 1 week
Reported by: Coverity
CID: 975255, 975256, 976989, 978989, 978990

show more ...

Change the process limits for RLIMIT_MEMLOCK to RLIM_INFINITY when
executing :mincore_resid

The default process limits in FreeBSD is 64kB for unprivileged users,
which empirically is too low to run

Change the process limits for RLIMIT_MEMLOCK to RLIM_INFINITY when
executing :mincore_resid

The default process limits in FreeBSD is 64kB for unprivileged users,
which empirically is too low to run the :mincore_resid testcase.

Process limits are inherited, so even though the default limit for
root users is RLIM_INFINITY, the inherited limit with "sudo" with the
default login.conf will be 64kB.

Use setrlimit to set rlim_max for RLIMIT_MEMLOCK to RLIM_INFINITY to
avoid ENOMEM issues when calling mlock to wire the mmap'ed address
space.

setrlimit requires root access to increase rlim_max, so require root
privileges when running the test

Discovered when executing the tests with sudo, e.g.
"sudo kyua test -k /usr/tests/lib/libc/sys/Kyuafile mincore_test"

MFC after: 2 weeks

show more ...

Remove unneeded hack fixed by r309626.

strvis(3) being tainted by our mbtowc(3) calls was causing
spurious failures here.

MFC after: 2 weeks
Sponsored by: Dell EMC Isilon

Don't build :strvis_locale if VIS_NOLOCALE is undefined

The copy of contrib/libc-vis on ^/stable/10 doesn't contain all of the features
in the ^/stable/11 // ^/head version, including VIS_NOLOCALE.

Don't build :strvis_locale if VIS_NOLOCALE is undefined

The copy of contrib/libc-vis on ^/stable/10 doesn't contain all of the features
in the ^/stable/11 // ^/head version, including VIS_NOLOCALE. The risk is lower
in conditionally running the test instead of backporting the newer version of
libc-vis

MFC after: now

show more ...

Fix setrlimit_test:setrlimit_memlock when the system has exceeded vm.max_wired.

This uses the same fix as r294894 did for the mlock test. The code from
that commit is moved into a common object fil

Fix setrlimit_test:setrlimit_memlock when the system has exceeded vm.max_wired.

This uses the same fix as r294894 did for the mlock test. The code from
that commit is moved into a common object file which PROGS supports
building first.

Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D8689

show more ...