macOS POSIX File Path from Device Number and Inode Number

makepath.go

package main

// #cgo LDFLAGS: -framework Carbon
// #include <Carbon/Carbon.h>
import "C"

import (
	"fmt"
	"unsafe"
)

func MakePath(dev uint64, ino uint64) (string, error) {
	vol := fmt.Sprintf("/.vol/%d/%d", dev, ino)

	volC := C.CString(vol)
	defer C.free(unsafe.Pointer(volC))

	var refC C.FSRef
	if statusC := C.FSPathMakeRefWithOptions((*C.UInt8)(unsafe.Pointer(volC)), C.kFSPathMakeRefDoNotFollowLeafSymlink, &refC, (*C.Boolean)(C.NULL)); statusC != 0 {
		return "", fmt.Errorf("%v", statusC)
	}

	pathC := unsafe.Pointer(&make([]C.UInt8, 1024)[0])
	if statusC := C.FSRefMakePath(&refC, (*C.UInt8)(pathC), C.UInt32(1024)); statusC != 0 {
		return "", fmt.Errorf("%v", statusC)
	}

	return C.GoString((*C.char)(pathC)), nil
}