Regression tests for system calls ported from NetBSD. Reimplement ATF with many hacks to adjust the tests as little as possible. Tests passing without source file adjustments: t_access t_getsockname t_msgctl t_sigaltstack t_bind t_gettimeofday t_msgsnd t_socketpair t_conect t_kill t_msync t_truncate t_getgroups t_link t_pipe t_umask t_getitimer t_listen t_ppoll t_write t_getlogin t_minherit t_sendrecv t_getpid t_mkdir t_setuid t_getsid t_mkfifo t_sigaction Tests passing after adjustments: t_chroot - fchroot is not implemented t_clock_gettime - requires sysctlbyname t_dup - OpenBSD dup3 is similar to Linux dup3 t_fork - add reallocarr function, remove clone(2) tests t_fsync - replace mkstemp t_getrusage - no expected fail, PR kern/30115 is NetBSD, work more t_kevent - no EVFILT_USER, DRVCTLDEV, passing kqueue forbidden t_mknod - remove tests for unsupported file types t_msgget - remove msgget_limit test t_poll - remove pollts_* tests t_ptrace - change EPERM -> EINVAL for PT_ATTACH of a parent t_revoke - remove basic tests, revoke only on ttys supported t_select - remove sigset_t struct as it is int on OpenBSD t_setrlimit - remove unsupported resource parameters and lwp t_syscall - add __syscall prototype t_vfork - SIGSTOP is masked before exec(3)/exit(3) t_wait_noproc - waitid and wait6 are not implemented t_wait_noproc_wnohang - waitid and wait6 are not implemented Failing tests: t_mlock - wrong errno, succeeds where not expected, POSIX imprecise t_mmap - ENOTBLK on test NetBSD is skipping, remove mmap_va0 test t_msgrcv - msgrcv(id, &r, 3 - 1, 0x41, 004000) != -1 t_pipe2 - closefrom(4) == -1, remove F_GETNOSIGPIPE and nosigpipe test t_stat - invalid GID with doas t_unlink - wrong errno according to POSIX Excluded tests: t_clock_nanosleep - not available t_clone - not available t_futex_ops - no lwp t_futex_robust - no lwp t_getcontext - not available, removed in POSIX.1-2008 t_getrandom - not available t_issetugid - works as iplemented t_lwp_create - not available t_lwp_ctl - not available t_mincore - removed t_mprotect - no exec_prot_support and no return_one in libc t_nanosleep - not available t_pollts - not available t_posix_fadvise - optional POSIX Advisory Information t_posix_fallocate - optional POSIX Advisory Information t_ptrace_sigchld - t_ptrace_wait - t_ptrace_wait3 - t_ptrace_wait4 - t_ptrace_wait6 - not implemented t_ptrace_waitid - t_ptrace_waitpid - t_sigqueue - not implemented, added in POSIX.1-2004 t_sigtimedwait - not implemented, added in POSIX.1-2004 t_swapcontext - not available, removed in POSIX.1-2008 t_timer_create - not implemented, added in POSIX.1-2004 t_ucontext - not available, removed in POSIX.1-2008 t_wait - wait6 is not available, not POSIX