You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: sysconf_freebsd.go
    path of file: ./repos/hubble-ui/backend/vendor/github.com/tklauser/go-sysconf
    
    the code of the file until where you have to start completion: // Copyright 2018 Tobias Klauser. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package sysconf

import "golang.org/x/sys/unix"

const (
	_HOST_NAME_MAX  = _MAXHOSTNAMELEN - 1
	_LOGIN_NAME_MAX = _MAXLOGNAME
	_SYMLOOP_MAX    = _MAXSYMLINKS
)

// sysconf implements sysconf(3) as in the FreeBSD 12 libc.
func sysconf(name int) (int64, error) {
	switch name {
	case SC_AIO_LISTIO_MAX:
		return sysctl32("p1003_1b.aio_listio_max"), nil
	case SC_AIO_MAX:
		return sysctl32("p1003_1b.aio_max"), nil
	case SC_AIO_PRIO_DELTA_MAX:
		return sysctl32("p1003_1b.aio_prio_delta_max"), nil
	case SC_ARG_MAX:
		return sysctl32("kern.argmax"), nil
	case SC_ATEXIT_MAX:
		return _ATEXIT_SIZE, nil
	case SC_CHILD_MAX:
		var rlim unix.Rlimit
		if err := unix.Getrlimit(unix.RLIMIT_NPROC, &rlim); err == nil {
			if rlim.Cur != unix.RLIM_INFINITY {
				return rlim.Cur, nil
			}
		}
		return -1, nil
	case SC_CLK_TCK:
		return _CLK_TCK, nil
	case SC_DELAYTIMER_MAX:
		return sysctl32("p1003_1b.delaytimer_max"), nil
	case SC_GETGR_R_SIZE_MAX, SC_GETPW_R_SIZE_MAX:
		return -1, nil
	case SC_IOV_MAX:
		return sysctl32("kern.iov_max"), nil
	case SC_MQ_OPEN_MAX:
		return yesno(sysctl32("p1003_1b.mq_open_max")), nil
	case SC_MQ_PRIO_MAX:
		return _MQ_PRIO_MAX, nil
	case SC_NGROUPS_MAX:
		return sysctl32("kern.ngroups"), nil
	case SC_OPEN_MAX:
		var rlim unix.Rlimit
		if err := unix.Getrlimit(unix.RLIMIT_NOFILE, &rlim); err == nil {
			if rlim.Cur != unix.RLIM_INFINITY {
				return rlim.Cur, nil
			}
		}
		return -1, nil
	case SC_RTSIG_MAX:
		return sysctl32("p1003_1b.rtsig_max"), nil
	case SC_SEM_NSEMS_MAX:
		return -1, nil
	case SC_SEM_VALUE_MAX:
		return _SEM_VALUE_MAX, nil
	case SC_SIGQUEUE_MAX:
		return sysctl32("p1003_1b.sigqueue_max"), nil
	case SC_STREAM_MAX:
		var rlim unix.Rlimit
		if err := unix.Getrlimit(unix.RLIMIT_NOFILE, &rlim); err != nil {
			return -1, nil
		}
		if rlim.Cur == unix.RLIM_INFINITY {
			return -1, nil
		}
		if rlim.Cur > _LONG_MAX {
			return -1, unix.EOVERFLOW
		}
		if rlim.Cur > _SHRT_MAX {
			return _SHRT_MAX, nil
		}
		return rlim.Cur, nil
	case SC_THREAD_DESTRUCTOR_ITERATIONS:
		return _PTHREAD_DESTRUCTOR_ITERATIONS, nil
	case SC_THREAD_KEYS_MAX:
		return _PTHREAD_KEYS_MAX, nil
	case SC_THREAD_PRIO_INHERIT:
		return _POSIX_THREAD_PRIO_INHERIT, nil
	case SC_THREAD_PRIO_PROTECT:
		return _POSIX_THREAD_PRIO_PROTECT, nil
	case SC_THREAD_STACK_MIN:
		return _PTHREAD_STACK_MIN, nil
	case SC_THREAD_THREADS_MAX:
		return -1, nil
	case SC_TIMER_MAX:
		return yesno(sysctl32("p1003_1b.timer_max")), nil
	case SC_TTY_NAME_MAX:
		return pathconf(_PATH_DEV, _PC_NAME_MAX), nil
	case SC_TZNAME_MAX:
		return pathconf(_PATH_ZONEINFO, _PC_NAME_MAX), nil

	case SC_IPV6:
		if _POSIX_IPV6 == 0 {
			fd, err := unix.Socket(unix.AF_INET6, unix.SOCK_DGRAM, 0)
			if err == nil && fd >= 0 {
				unix.Close(fd)
				return int64(200112), nil
			}
			return 0, nil
		}
		return _POSIX_IPV6, nil
	case SC_MESSAGE_PASSING:
		if _POSIX_MESSAGE_PASSING == 0 {
			return yesno(sysctl32("p1003_1b.message_passing")), nil
		}
		return _POSIX_MESSAGE_PASSING, nil
	case SC_PRIORITIZED_IO:
		if _POSIX_PRIORITIZED_IO == 0 {
			return yesno(sysctl32("p1003_1b.prioritized_io")), nil
		}
		return _POSIX_PRIORITIZED_IO, nil
	case SC_PRIORITY_SCHEDULING:
		if _POSIX_PRIORITY_SCHEDULING == 0 {
			return yesno(sysctl32("p1003_1b.priority_scheduling")), nil
		}
		return _POSIX_PRIORITY_SCHEDULING, nil
	case SC_REALTIME_SIGNALS:
		if _POSIX_REALTIME_SIGNALS == 0 {
			return yesno(sysctl32("p1003_1b.realtime_signals")), nil
		}
		return _POSIX_REALTIME_SIGNALS, nil
	case SC_SAVED_IDS:
		return yesno(sysctl32("kern.saved_ids")), nil
	case SC_SEMAPHORES:
		if _POSIX_SEMAPHORES == 0 {
			return yesno(sysctl32("p1003_1b.semaphores")), nil
		}
		return _POSIX_SEMAPHORES, nil
	case SC_SPAWN:
		return _POSIX_SPAWN, nil
	case SC_SPIN_LOCKS:
		return _POSIX_SPIN_LOCKS, nil
	case SC_SPORADIC_SERVER:
		return _POSIX_SPORADIC_SERVER, nil
	case SC_SYNCHRONIZED_IO:
		if _POSIX_SYNCHRONIZED_IO == 0 {
			return yesno(sysctl32("p1003_1b.synchronized_io")), nil
		}
		return _POSIX_SYNCHRONIZED_IO, nil
	case SC_THREAD_ATTR_STACKADDR:
		return _POSIX_THREAD_ATTR_STACKADDR, nil
	case SC_THREAD_ATTR_STACKSIZE:
		return _POSIX_THREAD_ATTR_STACKSIZE, nil
	case SC_THREAD_CPUTIME:
		return _POSIX_THREAD_CPUTIME, nil
	case SC_THREAD_PRIORITY_SCHEDULING:
		return _POSIX_THREAD_PRIORITY_SCHEDULING, nil
	case SC_THREAD_PROCESS_SHARED:
		return _POSIX_THREAD_PROCESS_SHARED, nil
	case SC_THREAD_SAFE_FUNCTIONS:
		return _POSIX_THREAD_SAFE_FUNCTIONS, nil
	case SC_TIMERS:
		if _POSIX_TIMERS == 0 {
			return yesno(sysctl32("p1003_1b.timers")), nil
		}
		return _POSIX_TIMERS, nil
	case SC_TRACE:
		return _POSIX_TRACE, nil
	case SC_TYPED_MEMORY_OBJECTS:
		return _POSIX_TYPED_MEMORY_OBJECTS, nil
	case SC_VERSION:
		// TODO(tk): FreeBSD libc uses sysctl(CTL_KERN, KERN_POSIX1)
		return _POSIX_VERSION, nil

		/* TODO(tk): these need GOARCH-
    
func sysconf(name int) (int64, error) {
	switch name {
	case SC_AIO_LISTIO_MAX:
		return sysctl32("p1003_1b.aio_listio_max"), nil
	case SC_AIO_MAX:
		return sysctl32("p1003_1b.aio_max"), nil
	case SC_AIO_PRIO_DELTA_MAX:
		return sysctl32("p1003_1b.aio_prio_delta_max"), nil
	case SC_ARG_MAX:
		return sysctl32("kern.argmax"), nil
	case SC_ATEXIT_MAX:
		return _ATEXIT_SIZE, nil
	case SC_CHILD_MAX:
		var rlim unix.Rlimit
		if err := unix.Getrlimit(unix.RLIMIT_NPROC, &rlim); err == nil {
			if rlim.Cur != unix.RLIM_INFINITY {
				return rlim.Cur, nil
			}
		}
		return -1, nil
	case SC_CLK_TCK:
		return _CLK_TCK, nil
	case SC_DELAYTIMER_MAX:
		return sysctl32("p1003_1b.delaytimer_max"), nil
	case SC_GETGR_R_SIZE_MAX, SC_GETPW_R_SIZE_MAX:
		return -1, nil
	case SC_IOV_MAX:
		return sysctl32("kern.iov_max"), nil
	case SC_MQ_OPEN_MAX:
		return yesno(sysctl32("p1003_1b.mq_open_max")), nil
	case SC_MQ_PRIO_MAX:
		return _MQ_PRIO_MAX, nil
	case SC_NGROUPS_MAX:
		return sysctl32("kern.ngroups"), nil
	case SC_OPEN_MAX:
		var rlim unix.Rlimit
		if err := unix.Getrlimit(unix.RLIMIT_NOFILE, &rlim); err == nil {
			if rlim.Cur != unix.RLIM_INFINITY {
				return rlim.Cur, nil
			}
		}
		return -1, nil
	case SC_RTSIG_MAX:
		return sysctl32("p1003_1b.rtsig_max"), nil
	case SC_SEM_NSEMS_MAX:
		return -1, nil
	case SC_SEM_VALUE_MAX:
		return _SEM_VALUE_MAX, nil
	case SC_SIGQUEUE_MAX:
		return sysctl32("p1003_1b.sigqueue_max"), nil
	case SC_STREAM_MAX:
		var rlim unix.Rlimit
		if err := unix.Getrlimit(unix.RLIMIT_NOFILE, &rlim); err != nil {
			return -1, nil
		}
		if rlim.Cur == unix.RLIM_INFINITY {
			return -1, nil
		}
		if rlim.Cur > _LONG_MAX {
			return -1, unix.EOVERFLOW
		}
		if rlim.Cur > _SHRT_MAX {
			return _SHRT_MAX, nil
		}
		return rlim.Cur, nil
	case SC_THREAD_DESTRUCTOR_ITERATIONS:
		return _PTHREAD_DESTRUCTOR_ITERATIONS, nil
	case SC_THREAD_KEYS_MAX:
		return _PTHREAD_KEYS_MAX, nil
	case SC_THREAD_PRIO_INHERIT:
		return _POSIX_THREAD_PRIO_INHERIT, nil
	case SC_THREAD_PRIO_PROTECT:
		return _POSIX_THREAD_PRIO_PROTECT, nil
	case SC_THREAD_STACK_MIN:
		return _PTHREAD_STACK_MIN, nil
	case SC_THREAD_THREADS_MAX:
		return -1, nil
	case SC_TIMER_MAX:
		return yesno(sysctl32("p1003_1b.timer_max")), nil
	case SC_TTY_NAME_MAX:
		return pathconf(_PATH_DEV, _PC_NAME_MAX), nil
	case SC_TZNAME_MAX:
		return pathconf(_PATH_ZONEINFO, _PC_NAME_MAX), nil

	case SC_IPV6:
		if _POSIX_IPV6 == 0 {
			fd, err := unix.Socket(unix.AF_INET6, unix.SOCK_DGRAM, 0)
			if err == nil && fd >= 0 {
				unix.Close(fd)
				return int64(200112), nil
			}
			return 0, nil
		}
		return _POSIX_IPV6, nil
	case SC_MESSAGE_PASSING:
		if _POSIX_MESSAGE_PASSING == 0 {
			return yesno(sysctl32("p1003_1b.message_passing")), nil
		}
		return _POSIX_MESSAGE_PASSING, nil
	case SC_PRIORITIZED_IO:
		if _POSIX_PRIORITIZED_IO == 0 {
			return yesno(sysctl32("p1003_1b.prioritized_io")), nil
		}
		return _POSIX_PRIORITIZED_IO, nil
	case SC_PRIORITY_SCHEDULING:
		if _POSIX_PRIORITY_SCHEDULING == 0 {
			return yesno(sysctl32("p1003_1b.priority_scheduling")), nil
		}
		return _POSIX_PRIORITY_SCHEDULING, nil
	case SC_REALTIME_SIGNALS:
		if _POSIX_REALTIME_SIGNALS == 0 {
			return yesno(sysctl32("p1003_1b.realtime_signals")), nil
		}
		return _POSIX_REALTIME_SIGNALS, nil
	case SC_SAVED_IDS:
		return yesno(sysctl32("kern.saved_ids")), nil
	case SC_SEMAPHORES:
		if _POSIX_SEMAPHORES == 0 {
			return yesno(sysctl32("p1003_1b.semaphores")), nil
		}
		return _POSIX_SEMAPHORES, nil
	case SC_SPAWN:
		return _POSIX_SPAWN, nil
	case SC_SPIN_LOCKS:
		return _POSIX_SPIN_LOCKS, nil
	case SC_SPORADIC_SERVER:
		return _POSIX_SPORADIC_SERVER, nil
	case SC_SYNCHRONIZED_IO:
		if _POSIX_SYNCHRONIZED_IO == 0 {
			return yesno(sysctl32("p1003_1b.synchronized_io")), nil
		}
		return _POSIX_SYNCHRONIZED_IO, nil
	case SC_THREAD_ATTR_STACKADDR:
		return _POSIX_THREAD_ATTR_STACKADDR, nil
	case SC_THREAD_ATTR_STACKSIZE:
		return _POSIX_THREAD_ATTR_STACKSIZE, nil
	case SC_THREAD_CPUTIME:
		return _POSIX_THREAD_CPUTIME, nil
	case SC_THREAD_PRIORITY_SCHEDULING:
		return _POSIX_THREAD_PRIORITY_SCHEDULING, nil
	case SC_THREAD_PROCESS_SHARED:
		return _POSIX_THREAD_PROCESS_SHARED, nil
	case SC_THREAD_SAFE_FUNCTIONS:
		return _POSIX_THREAD_SAFE_FUNCTIONS, nil
	case SC_TIMERS:
		if _POSIX_TIMERS == 0 {
			return yesno(sysctl32("p1003_1b.timers")), nil
		}
		return _POSIX_TIMERS, nil
	case SC_TRACE:
		return _POSIX_TRACE, nil
	case SC_TYPED_MEMORY_OBJECTS:
		return _POSIX_TYPED_MEMORY_OBJECTS, nil
	case SC_VERSION:
		// TODO(tk): FreeBSD libc uses sysctl(CTL_KERN, KERN_POSIX1)
		return _POSIX_VERSION, nil

		/* TODO(tk): these need GOARCH-dependent integer size checks
		case SC_V6_ILP32_OFF32:
			return _V6_ILP32_OFF32, nil
		case SC_V6_ILP32_OFFBIG:
			return _V6_ILP32_OFFBIG, nil
		case SC_V6_LP64_OFF64:
			return _V6_LP64_OFF64, nil
		case SC_V6_LPBIG_OFFBIG:
			return _V6_LPBIG_OFFBIG, nil
		*/

	case SC_2_CHAR_TERM:
		return _POSIX2_CHAR_TERM, nil
	case SC_2_PBS,
		SC_2_PBS_ACCOUNTING,
		SC_2_PBS_CHECKPOINT,
		SC_2_PBS_LOCATE,
		SC_2_PBS_MESSAGE,
		SC_2_PBS_TRACK:
		return _POSIX2_PBS, nil
	case SC_2_UPE:
		return _POSIX2_UPE, nil

	case SC_XOPEN_CRYPT:
		return _XOPEN_CRYPT, nil
	case SC_XOPEN_ENH_I18N:
		return _XOPEN_ENH_I18N, nil
	case SC_XOPEN_REALTIME:
		return _XOPEN_REALTIME, nil
	case SC_XOPEN_REALTIME_THREADS:
		return _XOPEN_REALTIME_THREADS, nil
	case SC_XOPEN_SHM:
		return _XOPEN_SHM, nil
	case SC_XOPEN_STREAMS:
		return -1, nil
	case SC_XOPEN_UNIX:
		return _XOPEN_UNIX, nil

	case SC_PHYS_PAGES:
		if val, err := unix.SysctlUint64("hw.availpages"); err == nil {
			return int64(val), nil
		}
		return -1, nil
	case SC_NPROCESSORS_CONF:
		fallthrough
	case SC_NPROCESSORS_ONLN:
		if val, err := unix.SysctlUint32("hw.ncpu"); err == nil {
			return int64(val), nil
		}
		return -1, nil
	}

	return sysconfGeneric(name)
}