Serge Bazanski | cc25bdf | 2018-10-25 14:02:58 +0200 | [diff] [blame] | 1 | // +build freebsd openbsd |
| 2 | |
| 3 | package common |
| 4 | |
| 5 | import ( |
| 6 | "os" |
| 7 | "os/exec" |
| 8 | "strings" |
| 9 | "unsafe" |
| 10 | |
| 11 | "golang.org/x/sys/unix" |
| 12 | ) |
| 13 | |
| 14 | func DoSysctrl(mib string) ([]string, error) { |
| 15 | sysctl, err := exec.LookPath("/sbin/sysctl") |
| 16 | if err != nil { |
| 17 | return []string{}, err |
| 18 | } |
| 19 | cmd := exec.Command(sysctl, "-n", mib) |
| 20 | cmd.Env = getSysctrlEnv(os.Environ()) |
| 21 | out, err := cmd.Output() |
| 22 | if err != nil { |
| 23 | return []string{}, err |
| 24 | } |
| 25 | v := strings.Replace(string(out), "{ ", "", 1) |
| 26 | v = strings.Replace(string(v), " }", "", 1) |
| 27 | values := strings.Fields(string(v)) |
| 28 | |
| 29 | return values, nil |
| 30 | } |
| 31 | |
| 32 | func CallSyscall(mib []int32) ([]byte, uint64, error) { |
| 33 | mibptr := unsafe.Pointer(&mib[0]) |
| 34 | miblen := uint64(len(mib)) |
| 35 | |
| 36 | // get required buffer size |
| 37 | length := uint64(0) |
| 38 | _, _, err := unix.Syscall6( |
| 39 | unix.SYS___SYSCTL, |
| 40 | uintptr(mibptr), |
| 41 | uintptr(miblen), |
| 42 | 0, |
| 43 | uintptr(unsafe.Pointer(&length)), |
| 44 | 0, |
| 45 | 0) |
| 46 | if err != 0 { |
| 47 | var b []byte |
| 48 | return b, length, err |
| 49 | } |
| 50 | if length == 0 { |
| 51 | var b []byte |
| 52 | return b, length, err |
| 53 | } |
| 54 | // get proc info itself |
| 55 | buf := make([]byte, length) |
| 56 | _, _, err = unix.Syscall6( |
| 57 | unix.SYS___SYSCTL, |
| 58 | uintptr(mibptr), |
| 59 | uintptr(miblen), |
| 60 | uintptr(unsafe.Pointer(&buf[0])), |
| 61 | uintptr(unsafe.Pointer(&length)), |
| 62 | 0, |
| 63 | 0) |
| 64 | if err != 0 { |
| 65 | return buf, length, err |
| 66 | } |
| 67 | |
| 68 | return buf, length, nil |
| 69 | } |