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readdirent_getdirentries.go (715B)

      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
      6 // +build darwin
      7 
      8 package unix
      9 
     10 import "unsafe"
     11 
     12 // ReadDirent reads directory entries from fd and writes them into buf.
     13 func ReadDirent(fd int, buf []byte) (n int, err error) {
     14 	// Final argument is (basep *uintptr) and the syscall doesn't take nil.
     15 	// 64 bits should be enough. (32 bits isn't even on 386). Since the
     16 	// actual system call is getdirentries64, 64 is a good guess.
     17 	// TODO(rsc): Can we use a single global basep for all calls?
     18 	var base = (*uintptr)(unsafe.Pointer(new(uint64)))
     19 	return Getdirentries(fd, buf, base)
     20 }