open-consul/vendor/github.com/shirou/gopsutil/internal/common/common_openbsd.go

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// +build openbsd
package common
import (
"os"
"os/exec"
"strings"
"unsafe"
"golang.org/x/sys/unix"
)
func DoSysctrl(mib string) ([]string, error) {
sysctl, err := exec.LookPath("/sbin/sysctl")
if err != nil {
return []string{}, err
}
cmd := exec.Command(sysctl, "-n", mib)
cmd.Env = getSysctrlEnv(os.Environ())
out, err := cmd.Output()
if err != nil {
return []string{}, err
}
v := strings.Replace(string(out), "{ ", "", 1)
v = strings.Replace(string(v), " }", "", 1)
values := strings.Fields(string(v))
return values, nil
}
func CallSyscall(mib []int32) ([]byte, uint64, error) {
mibptr := unsafe.Pointer(&mib[0])
miblen := uint64(len(mib))
// get required buffer size
length := uint64(0)
_, _, err := unix.Syscall6(
unix.SYS___SYSCTL,
uintptr(mibptr),
uintptr(miblen),
0,
uintptr(unsafe.Pointer(&length)),
0,
0)
if err != 0 {
var b []byte
return b, length, err
}
if length == 0 {
var b []byte
return b, length, err
}
// get proc info itself
buf := make([]byte, length)
_, _, err = unix.Syscall6(
unix.SYS___SYSCTL,
uintptr(mibptr),
uintptr(miblen),
uintptr(unsafe.Pointer(&buf[0])),
uintptr(unsafe.Pointer(&length)),
0,
0)
if err != 0 {
return buf, length, err
}
return buf, length, nil
}