1 // Copyright 2019 The Go Authors. All rights reserved.

     2 // Use of this source code is governed by a BSD-style

     3 // license that can be found in the LICENSE file.

     4 

     5 //go:build darwin && go1.12 && !go1.13

     6 // +build darwin,go1.12,!go1.13

     7 

     8 package unix

     9 

    10 import (

    11 	"unsafe"

    12 )

    13 

    14 const _SYS_GETDIRENTRIES64 = 344

    15 

    16 func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {

    17 	// To implement this using libSystem we'd need syscall_syscallPtr for

    18 	// fdopendir. However, syscallPtr was only added in Go 1.13, so we fall

    19 	// back to raw syscalls for this func on Go 1.12.

    20 	var p unsafe.Pointer

    21 	if len(buf) > 0 {

    22 		p = unsafe.Pointer(&buf[0])

    23 	} else {

    24 		p = unsafe.Pointer(&_zero)

    25 	}

    26 	r0, _, e1 := Syscall6(_SYS_GETDIRENTRIES64, uintptr(fd), uintptr(p), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)

    27 	n = int(r0)

    28 	if e1 != 0 {

    29 		return n, errnoErr(e1)

    30 	}

    31 	return n, nil

    32 }