status-go/vendor/github.com/tklauser/go-sysconf/sysconf_netbsd.go

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// 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 (
"sync"
"golang.org/x/sys/unix"
)
const (
_HOST_NAME_MAX = _MAXHOSTNAMELEN
_LOGIN_NAME_MAX = _MAXLOGNAME + 1
_SYMLOOP_MAX = _MAXSYMLINKS
_POSIX2_C_DEV = -1
_POSIX2_UPE = -1
)
var (
clktck int64
clktckOnce sync.Once
)
func sysconfPOSIX(name int) (int64, error) {
// NetBSD does not define all _POSIX_* values used in sysconf_posix.go
// Handle the supported ones here.
switch name {
case SC_SHELL:
return _POSIX_SHELL, nil
case SC_VERSION:
return _POSIX_VERSION, nil
}
return -1, errInvalid
}
func sysconf(name int) (int64, error) {
// NetBSD uses sysctl to get some of these values. For the user.* namespace,
// calls get handled by user_sysctl in /usr/src/lib/libc/gen/sysctl.c
// Duplicate the relevant values here.
switch name {
case SC_ARG_MAX:
return sysctl32("kern.argmax"), 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 int64(rlim.Cur), nil
}
}
return -1, nil
case SC_STREAM_MAX:
// sysctl("user.stream_max")
return _FOPEN_MAX, nil
case SC_TTY_NAME_MAX:
return pathconf(_PATH_DEV, _PC_NAME_MAX), nil
case SC_CLK_TCK:
clktckOnce.Do(func() {
clktck = -1
if ci, err := unix.SysctlClockinfo("kern.clockrate"); err == nil {
clktck = int64(ci.Hz)
}
})
return clktck, nil
case SC_NGROUPS_MAX:
return sysctl32("kern.ngroups"), nil
case SC_JOB_CONTROL:
return sysctl32("kern.job_control"), nil
case SC_OPEN_MAX:
var rlim unix.Rlimit
if err := unix.Getrlimit(unix.RLIMIT_NOFILE, &rlim); err == nil {
return int64(rlim.Cur), nil
}
return -1, nil
case SC_TZNAME_MAX:
// sysctl("user.tzname_max")
return _NAME_MAX, nil
// 1003.1b
case SC_FSYNC:
return sysctl32("kern.fsync"), nil
case SC_MAPPED_FILES:
return sysctl32("kern.mapped_files"), nil
case SC_MONOTONIC_CLOCK:
return sysctl32("kern.monotonic_clock"), nil
case SC_SEMAPHORES:
return sysctl32("kern.posix_semaphores"), nil
case SC_TIMERS:
return sysctl32("kern.posix_timers"), nil
// 1003.1c
case SC_LOGIN_NAME_MAX:
return sysctl32("kern.login_name_max"), nil
case SC_THREADS:
return sysctl32("kern.posix_threads"), nil
// 1003.1j
case SC_BARRIERS:
return sysctl32("kern.posix_barriers"), nil
// 1003.2
case SC_2_VERSION:
// sysctl("user.posix2_version")
return _POSIX2_VERSION, nil
case SC_2_UPE:
// sysctl("user.posix2_upe")
return _POSIX2_UPE, nil
// XPG 4.2
case SC_IOV_MAX:
return sysctl32("kern.iov_max"), nil
// 1003.1-2001, XSI Option Group
case SC_AIO_LISTIO_MAX:
return sysctl32("kern.aio_listio_max"), nil
case SC_AIO_MAX:
return sysctl32("kern.aio_max"), nil
case SC_ASYNCHRONOUS_IO:
return sysctl32("kern.posix_aio"), nil
case SC_MQ_OPEN_MAX:
return sysctl32("kern.mqueue.mq_open_max"), nil
case SC_MQ_PRIO_MAX:
return sysctl32("kern.mqueue.mq_prio_max"), nil
case SC_ATEXIT_MAX:
// sysctl("user.atexit_max")
return -1, nil // TODO
// Extensions
case SC_NPROCESSORS_CONF:
return sysctl32("hw.ncpu"), nil
case SC_NPROCESSORS_ONLN:
return sysctl32("hw.ncpuonline"), nil
// Linux/Solaris
case SC_PHYS_PAGES:
return sysctl64("hw.physmem64") / int64(unix.Getpagesize()), nil
// Native
case SC_THREAD_DESTRUCTOR_ITERATIONS:
return _POSIX_THREAD_DESTRUCTOR_ITERATIONS, nil
case SC_THREAD_KEYS_MAX:
return _POSIX_THREAD_KEYS_MAX, nil
case SC_THREAD_STACK_MIN:
return int64(unix.Getpagesize()), nil
case SC_THREAD_THREADS_MAX:
return sysctl32("kern.maxproc"), nil
}
return sysconfGeneric(name)
}