common_darwin.go

Documentation: github.com/shirou/gopsutil/internal/common

     1  // +build darwin
     2  
     3  package common
     4  
     5  import (
     6  	"context"
     7  	"os"
     8  	"os/exec"
     9  	"strings"
    10  	"unsafe"
    11  
    12  	"golang.org/x/sys/unix"
    13  )
    14  
    15  func DoSysctrlWithContext(ctx context.Context, mib string) ([]string, error) {
    16  	sysctl, err := exec.LookPath("sysctl")
    17  	if err != nil {
    18  		return []string{}, err
    19  	}
    20  	cmd := exec.CommandContext(ctx, sysctl, "-n", mib)
    21  	cmd.Env = getSysctrlEnv(os.Environ())
    22  	out, err := cmd.Output()
    23  	if err != nil {
    24  		return []string{}, err
    25  	}
    26  	v := strings.Replace(string(out), "{ ", "", 1)
    27  	v = strings.Replace(string(v), " }", "", 1)
    28  	values := strings.Fields(string(v))
    29  
    30  	return values, nil
    31  }
    32  
    33  func CallSyscall(mib []int32) ([]byte, uint64, error) {
    34  	miblen := uint64(len(mib))
    35  
    36  	// get required buffer size
    37  	length := uint64(0)
    38  	_, _, err := unix.Syscall6(
    39  		202, // unix.SYS___SYSCTL https://github.com/golang/sys/blob/76b94024e4b621e672466e8db3d7f084e7ddcad2/unix/zsysnum_darwin_amd64.go#L146
    40  		uintptr(unsafe.Pointer(&mib[0])),
    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  		202, // unix.SYS___SYSCTL https://github.com/golang/sys/blob/76b94024e4b621e672466e8db3d7f084e7ddcad2/unix/zsysnum_darwin_amd64.go#L146
    58  		uintptr(unsafe.Pointer(&mib[0])),
    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  }
    70
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