本文整理汇总了Golang中syscall.SysctlUint32函数的典型用法代码示例。如果您正苦于以下问题：Golang SysctlUint32函数的具体用法？Golang SysctlUint32怎么用？Golang SysctlUint32使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了SysctlUint32函数的11个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。
示例1: maxListenerBacklog
func maxListenerBacklog() int {
var (
n uint32
err error
)
switch runtime.GOOS {
case "darwin", "freebsd":
n, err = syscall.SysctlUint32("kern.ipc.somaxconn")
case "netbsd":
// NOTE: NetBSD has no somaxconn-like kernel state so far
case "openbsd":
n, err = syscall.SysctlUint32("kern.somaxconn")
}
if n == 0 || err != nil {
return syscall.SOMAXCONN
}
// FreeBSD stores the backlog in a uint16, as does Linux.
// Assume the other BSDs do too. Truncate number to avoid wrapping.
// See issue 5030.
if n > 1<<16-1 {
n = 1<<16 - 1
}
return int(n)
}示例2: init
func init() {
b1, err1 := syscall.SysctlUint32("kern.features.security_capabilities")
b2, err2 := syscall.SysctlUint32("kern.features.security_capability_mode")
if b1 != 0 && b2 != 0 && err1 == nil && err2 == nil {
hasCapabilities = true
}
}示例3: init
func init() {
osrel, err := syscall.SysctlUint32("kern.osreldate")
if err != nil {
return
}
// The O_CLOEXEC flag was introduced in FreeBSD 8.3.
// See http://www.freebsd.org/doc/en/books/porters-handbook/freebsd-versions.html.
if osrel >= 803000 {
supportsCloseOnExec = true
}
}示例4: cpuInfo
func cpuInfo() (map[string]interface{}, error) {
info := make(map[string]interface{})
cpuKeys := map[string]string{"vendor": "vendor_id", "brand_string": "model_name"}
for sysctlName, gohaiName := range cpuKeys {
k, err := syscall.Sysctl("machdep.cpu." + sysctlName)
if err != nil {
return nil, err
}
info[gohaiName] = k
}
cpuKeyInts := map[string]string{"model": "model", "family": "family", "stepping": "stepping"}
for sysctlName, gohaiName := range cpuKeyInts {
k, err := syscall.SysctlUint32("machdep.cpu." + sysctlName)
if err != nil {
return nil, err
}
info[gohaiName] = k
}
hwKeyInts := map[string]string{"physicalcpu": "real", "logicalcpu": "total", "cpufrequency": "mhz"}
for sysctlName, gohaiName := range hwKeyInts {
k, err := syscall.SysctlUint32("hw." + sysctlName)
if err != nil {
return nil, err
}
info[gohaiName] = k
}
info["mhz"] = info["mhz"].(uint32) / 1000000
cpuFlags, err := syscall.Sysctl("machdep.cpu.features")
if err != nil {
return nil, err
}
info["flags"] = strings.Split(strings.ToLower(cpuFlags), " ")
return info, nil
}示例5: init
func init() {
freebsdVersion, _ = syscall.SysctlUint32("kern.osreldate")
if freebsdVersion >= 1000000 {
sockOpts[ssoMulticastInterface].typ = ssoTypeIPMreqn
}
if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" {
archs, _ := syscall.Sysctl("kern.supported_archs")
for _, s := range strings.Fields(archs) {
if s == "amd64" {
freebsd32o64 = true
break
}
}
}
}示例6: maxListenerBacklog
func maxListenerBacklog() int {
var (
n uint32
err error
)
n, err = syscall.SysctlUint32("kern.ipc.somaxconn")
if n == 0 || err != nil {
return syscall.SOMAXCONN
}
// FreeBSD stores the backlog in a uint16, as does Linux.
// Assume the other BSDs do too. Truncate number to avoid wrapping.
// See issue 5030.
if n > 1<<16-1 {
n = 1<<16 - 1
}
return int(n)
}示例7: printUptime
func printUptime(us []utmp.Utmp) {
var (
bootTime int32
entries int64
now utmp.TimeVal
days, hours, mins int
uptime float64
)
request := "kern.boottime"
secs, err := syscall.SysctlUint32(request)
if err != nil {
panic(err)
}
secs = float64(secs)
if 0 <= secs || secs < math.MaxFloat64 {
uptime = secs
} else {
uptime = -1
}
for _, v := range us {
if v.IsUserProcess() {
entries++
}
if v.Type == utmp.BootTime {
bootTime = v.Time.Sec
}
}
now.GetTimeOfDay()
if uptime == 0 {
if bootTime == 0 {
fatal.Fatalln("couldn't get boot time")
}
uptime = float64(now.Sec - bootTime)
}
days = int(uptime) / 86400
hours = (int(uptime) - (days * 86400)) / 3600
mins = (int(uptime) - (days * 86400) - (hours * 3600)) / 60
fmt.Print(time.Now().Local().Format(" 15:04pm "))
if uptime == -1 {
fmt.Print("up ???? days ??:??, ")
} else {
if 0 < days {
if days > 1 {
fmt.Printf("up %d days %2d:%02d, ", days, hours, mins)
} else {
fmt.Printf("up %d day %2d:%02d, ", days, hours, mins)
}
} else {
fmt.Printf("up %2d:%02d, ", hours, mins)
}
}
if len(us) > 1 || len(us) == 0 {
fmt.Printf("%d users", entries)
} else {
fmt.Printf("%d user", entries)
}
var avg [3]float64
loads := stdlib.GetLoadAvg(&avg)
if loads == -1 {
fmt.Printf("%s", "\n")
} else {
if loads > 0 {
fmt.Printf(", load average: %.2f", avg[0])
}
if loads > 1 {
fmt.Printf(", %.2f", avg[1])
}
if loads > 2 {
fmt.Printf(", %.2f", avg[2])
}
if loads > 0 {
fmt.Printf("%s", "\n")
}
}
}示例8:
func ext۰syscall۰SysctlUint32(fr *frame, args []value) value {
r, err := syscall.SysctlUint32(args[0].(string))
return tuple{r, wrapError(err)}
}示例9: init
func init() {
freebsdVersion, _ = syscall.SysctlUint32("kern.osreldate")
if freebsdVersion >= 1000000 {
sockOpts[ssoMulticastInterface].typ = ssoTypeIPMreqn
}
}示例10: probeRoutingStack
func probeRoutingStack() (int, map[int]parseFn) {
var p uintptr
wordSize := int(unsafe.Sizeof(p))
align := int(unsafe.Sizeof(p))
// In the case of kern.supported_archs="amd64 i386", we need
// to know the underlying kernel's architecture because the
// alignment for routing facilities are set at the build time
// of the kernel.
conf, _ := syscall.Sysctl("kern.conftxt")
for i, j := 0, 0; j < len(conf); j++ {
if conf[j] != '\n' {
continue
}
s := conf[i:j]
i = j + 1
if len(s) > len("machine") && s[:len("machine")] == "machine" {
s = s[len("machine"):]
for k := 0; k < len(s); k++ {
if s[k] == ' ' || s[k] == '\t' {
s = s[1:]
}
break
}
if s == "amd64" {
align = 8
}
break
}
}
var rtm, ifm, ifam, ifmam, ifanm *wireFormat
if align != wordSize { // 386 emulation on amd64
rtm = &wireFormat{extOff: sizeofRtMsghdrFreeBSD10Emu - sizeofRtMetricsFreeBSD10Emu, bodyOff: sizeofRtMsghdrFreeBSD10Emu}
ifm = &wireFormat{extOff: 16}
ifam = &wireFormat{extOff: sizeofIfaMsghdrFreeBSD10Emu, bodyOff: sizeofIfaMsghdrFreeBSD10Emu}
ifmam = &wireFormat{extOff: sizeofIfmaMsghdrFreeBSD10Emu, bodyOff: sizeofIfmaMsghdrFreeBSD10Emu}
ifanm = &wireFormat{extOff: sizeofIfAnnouncemsghdrFreeBSD10Emu, bodyOff: sizeofIfAnnouncemsghdrFreeBSD10Emu}
} else {
rtm = &wireFormat{extOff: sizeofRtMsghdrFreeBSD10 - sizeofRtMetricsFreeBSD10, bodyOff: sizeofRtMsghdrFreeBSD10}
ifm = &wireFormat{extOff: 16}
ifam = &wireFormat{extOff: sizeofIfaMsghdrFreeBSD10, bodyOff: sizeofIfaMsghdrFreeBSD10}
ifmam = &wireFormat{extOff: sizeofIfmaMsghdrFreeBSD10, bodyOff: sizeofIfmaMsghdrFreeBSD10}
ifanm = &wireFormat{extOff: sizeofIfAnnouncemsghdrFreeBSD10, bodyOff: sizeofIfAnnouncemsghdrFreeBSD10}
}
rel, _ := syscall.SysctlUint32("kern.osreldate")
switch {
case rel < 800000:
if align != wordSize { // 386 emulation on amd64
ifm.bodyOff = sizeofIfMsghdrFreeBSD7Emu
} else {
ifm.bodyOff = sizeofIfMsghdrFreeBSD7
}
case 800000 <= rel && rel < 900000:
if align != wordSize { // 386 emulation on amd64
ifm.bodyOff = sizeofIfMsghdrFreeBSD8Emu
} else {
ifm.bodyOff = sizeofIfMsghdrFreeBSD8
}
case 900000 <= rel && rel < 1000000:
if align != wordSize { // 386 emulation on amd64
ifm.bodyOff = sizeofIfMsghdrFreeBSD9Emu
} else {
ifm.bodyOff = sizeofIfMsghdrFreeBSD9
}
case 1000000 <= rel && rel < 1100000:
if align != wordSize { // 386 emulation on amd64
ifm.bodyOff = sizeofIfMsghdrFreeBSD10Emu
} else {
ifm.bodyOff = sizeofIfMsghdrFreeBSD10
}
default:
if align != wordSize { // 386 emulation on amd64
ifm.bodyOff = sizeofIfMsghdrFreeBSD11Emu
} else {
ifm.bodyOff = sizeofIfMsghdrFreeBSD11
}
}
return align, map[int]parseFn{
sysRTM_ADD: rtm.parseRouteMessage,
sysRTM_DELETE: rtm.parseRouteMessage,
sysRTM_CHANGE: rtm.parseRouteMessage,
sysRTM_GET: rtm.parseRouteMessage,
sysRTM_LOSING: rtm.parseRouteMessage,
sysRTM_REDIRECT: rtm.parseRouteMessage,
sysRTM_MISS: rtm.parseRouteMessage,
sysRTM_LOCK: rtm.parseRouteMessage,
sysRTM_RESOLVE: rtm.parseRouteMessage,
sysRTM_NEWADDR: ifam.parseInterfaceAddrMessage,
sysRTM_DELADDR: ifam.parseInterfaceAddrMessage,
sysRTM_IFINFO: ifm.parseInterfaceMessage,
sysRTM_NEWMADDR: ifmam.parseInterfaceMulticastAddrMessage,
sysRTM_DELMADDR: ifmam.parseInterfaceMulticastAddrMessage,
sysRTM_IFANNOUNCE: ifanm.parseInterfaceAnnounceMessage,
}
}示例11: init
func init() {
freebsdVersion, _ = syscall.SysctlUint32("kern.osreldate")
}