1//go:build linux
 2
 3package dirent
 4
 5import (
 6	"os"
 7	"syscall"
 8	"unsafe"
 9)
10
11func direntIno(buf []byte) (uint64, bool) {
12	return readInt(buf, unsafe.Offsetof(syscall.Dirent{}.Ino), unsafe.Sizeof(syscall.Dirent{}.Ino))
13}
14
15func direntReclen(buf []byte) (uint64, bool) {
16	return readInt(buf, unsafe.Offsetof(syscall.Dirent{}.Reclen), unsafe.Sizeof(syscall.Dirent{}.Reclen))
17}
18
19func direntNamlen(buf []byte) (uint64, bool) {
20	reclen, ok := direntReclen(buf)
21	if !ok {
22		return 0, false
23	}
24	return reclen - uint64(unsafe.Offsetof(syscall.Dirent{}.Name)), true
25}
26
27func direntType(buf []byte) os.FileMode {
28	off := unsafe.Offsetof(syscall.Dirent{}.Type)
29	if off >= uintptr(len(buf)) {
30		return ^os.FileMode(0) // unknown
31	}
32	typ := buf[off]
33	switch typ {
34	case syscall.DT_BLK:
35		return os.ModeDevice
36	case syscall.DT_CHR:
37		return os.ModeDevice | os.ModeCharDevice
38	case syscall.DT_DIR:
39		return os.ModeDir
40	case syscall.DT_FIFO:
41		return os.ModeNamedPipe
42	case syscall.DT_LNK:
43		return os.ModeSymlink
44	case syscall.DT_REG:
45		return 0
46	case syscall.DT_SOCK:
47		return os.ModeSocket
48	}
49	return ^os.FileMode(0) // unknown
50}