src/lib/libkvm/tests, branch releng/12.2

MFC r363020: test: add libkvm read test

2020-08-06T20:44:18+00:00

This test checks if value received from kvm_read is sane, based on
value returned by sysctl interface.

Reviewed by:	jhb
Approved by:	jhibbits (mentor)
Sponsored by:	Eldorado Research Institute (eldorado.org.br)
Differential Revision:	https://reviews.freebsd.org/D23783

MFC r346571,r346572:

2019-04-29T19:34:09+00:00

Update the spelling of my name

Previous spellings of my name (NGie, Ngie) weren't my legal spelling. Use Enji
instead for clarity.

While here, remove "All Rights Reserved" from copyrights I "own".

DIRDEPS_BUILD: Connect new directories.

2017-10-31T00:04:07+00:00

Sponsored by:	Dell EMC Isilon

Fix #if conditional added in r319008

2017-05-27T23:23:22+00:00

I committed an earlier version of the file by accident

This is a no-op on ^/head and ^/stable/11.

MFC after:	now
Sponsored by:	Dell EMC Isilon

kvm_geterr_test: Compile out the portions that require kvm_open2(3) on

2017-05-27T23:19:32+00:00

systems that lack the libcall, based on __FreeBSD_version.

kvm_open2(3) wasn't made available until r291406, which is in ^/stable/11,
but not ^/stable/10. This makes some of kvm_geterr_test available for testing
on ^/stable/10.

MFC after:	now
Sponsored by:	Dell EMC Isilon

lib/libkvm: start adding basic tests for kvm(3)

2017-03-28T17:37:49+00:00

- kvm_close: add a testcase to verify support for errno = EINVAL / -1
  (see D10065) when kd == NULL is provided to the libcall.
- kvm_geterr:
-- Add a negative testcase for kd == NULL returning "" (see D10022).
-- Add two positive testcases:
--- test the error case using kvm_write on a O_RDONLY descriptor.
--- test the "no error" case using kvm_read(3) and kvm_nlist(3) as
    helper routines and by injecting a bogus error message via
    _kvm_err (an internal API) _kvm_err was used as there isn't a
    formalized way to clear the error output, and because
    kvm_nlist always returns ENOENT with the NULL terminator today.
- kvm_open, kvm_open2:
-- Add some basic negative tests for kvm_open(3) and kvm_open2(3).
   Testing positive cases with a specific
   `corefile`/`execfile`/`resolver` requires more work and would require
   user intervention today in order to reliably test this out.

Reviewed by:	markj
MFC after:	2 months
Sponsored by:	Dell EMC Isilon
Differential Revision:	D10024