Rewrite tests for CARP in a shell script instead of C

The new shell script enables us to modify/add tests easily.

branches: 1.5.2;
No underscore needed

We also need librump_vfs

While here, remove duplicate entry for librump

And yet another one

branches: 1.2.6;
Fix static linking for the tests: -lrump is also used by -lrumpuser,
so we also need -lrump after -lrumpuser. Fixes build for sun2.

branches: 1.1.12; 1.1.22;
Add a most elementary carp test: it forks off two processes,
configures carp in each of them, and after verifying that the shared
address responds to ping it brutally kills the master like a proper
carnivore (none of that ifconfig down sissy vegan nonsense). Then
the test checks if the backup got its act together by pinging the
shared address and passes verdict.

Rewrite tests for CARP in a shell script instead of C

The new shell script enables us to modify/add tests easily.

branches: 1.6.2;
Don't play with "../.." in includes for h_macros.h; deal with it centrally.
Minor fixes.

branches: 1.5.24;
fix fallout from including signal.h in rump_syscallargs.h

Adjusts tests after import of atf-0.12:

- The use.fs property is gone.
- Mark the tests/fs/t_create:attrs test as broken when using the default
unprivileged-user:_atf setting. This probably deserves a fix somehow
but I'm not sure at this point.

add Makefile.inc everywhere so that we can set WARNS=4 by default. Amazing
how many bugs this found :-)

Put some sleeps between forking the hosts. Otherwise a race may
be triggered which appears to cause one host to go berzerk with
sending carp advertisements and ignore ping requests.

I'll get to the bottom of this eventually, but this is a stopgap
to prevent the test from failing, hopefully -- the race doesn't
appear to trigger for me even with 0.1s on a loaded machine, so
0.5s should be better than fine.

(hi jmmv ;)

Add a most elementary carp test: it forks off two processes,
configures carp in each of them, and after verifying that the shared
address responds to ping it brutally kills the master like a proper
carnivore (none of that ifconfig down sissy vegan nonsense). Then
the test checks if the backup got its act together by pinging the
shared address and passes verdict.

Don't expect the net/carp/t_basic/carp_handover_ipv6_halt_nocarpdevip
and carp_handover_ipv6_ifdown_nocarpdevip test cases to fail. At
least on the TNF i386 and amd64 testbeds, they pass more often than
not since the commit of src/sys/netinet/ip_carp.c 1.119 by mlelstv on
2023.04.07.06.44.08.

branches: 1.8.8;
tests: use rump_server_add_iface to create interfaces

branches: 1.7.4;
Clean up clunky eval strings

- Remove unnecessary \ at EOL
- This allows to omit ; too
- Remove unnecessary quotes for arguments of atf_set
- Don't expand $DEBUG in eval
- We expect it's expanded on execution

Suggested by kre@

branches: 1.6.2;
Test CARP handover on setups without having IPs on carpdev (shmif)

Note that tests for IPv6 don't pass yet; nd6 needs to handle CARP
correctly like arp does.

Reduce duplicated codes (DRY)

branches: 1.4.2; 1.4.4; 1.4.6;
Make CARP on IPv6 work

It passes ATF tests but no more, no less.

Test handovers on interface down as well as server halt

Add a test case for CARP on IPv6

The test case fails expectedly because the implementation of CARP on IPv6
is incomplete yet.

Rewrite tests for CARP in a shell script instead of C

The new shell script enables us to modify/add tests easily.