runtime,os,syscall,internal/poll: replace getdirentries on iOS

The getdirentries syscall is considered private API on iOS and is
rejected by the App Store submission checks. Replace it with the
fdopendir/readdir_r/closedir syscalls.

Fixes #28984

Change-Id: I73341b124310e9cb34834a95f946769f337ec5b7
Reviewed-on: https://go-review.googlesource.com/c/153338
Reviewed-by: Keith Randall <khr@golang.org>

src/internal/poll/fd_opendir_ios.go

@@ -0,0 +1,35 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin
+// +build arm arm64
+
+package poll
+
+import (
+	"syscall"
+	_ "unsafe" // for go:linkname
+)
+
+// OpenDir returns a pointer to a DIR structure suitable for
+// ReadDir. In case of an error, the name of the failed
+// syscall is returned along with a syscall.Errno.
+func (fd *FD) OpenDir() (uintptr, string, error) {
+	// fdopendir(3) takes control of the file descriptor,
+	// so use a dup.
+	fd2, call, err := fd.Dup()
+	if err != nil {
+		return 0, call, err
+	}
+	dir, err := fdopendir(fd2)
+	if err != nil {
+		syscall.Close(fd2)
+		return 0, "fdopendir", err
+	}
+	return dir, "", nil
+}
+
+// Implemented in syscall/syscall_darwin.go.
+//go:linkname fdopendir syscall.fdopendir
+func fdopendir(fd int) (dir uintptr, err error)

src/os/dir_ios.go

@@ -0,0 +1,87 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin
+// +build arm arm64
+
+package os
+
+import (
+	"io"
+	"runtime"
+	"syscall"
+	"unsafe"
+)
+
+// Auxiliary information if the File describes a directory
+type dirInfo struct {
+	dir uintptr // Pointer to DIR structure from dirent.h
+}
+
+func (d *dirInfo) close() {
+	if d.dir == 0 {
+		return
+	}
+	closedir(d.dir)
+	d.dir = 0
+}
+
+func (f *File) readdirnames(n int) (names []string, err error) {
+	if f.dirinfo == nil {
+		dir, call, errno := f.pfd.OpenDir()
+		if errno != nil {
+			return nil, wrapSyscallError(call, errno)
+		}
+		f.dirinfo = &dirInfo{
+			dir: dir,
+		}
+	}
+	d := f.dirinfo
+
+	size := n
+	if size <= 0 {
+		size = 100
+		n = -1
+	}
+
+	names = make([]string, 0, size)
+	var dirent syscall.Dirent
+	var entptr uintptr
+	for len(names) < size {
+		if res := readdir_r(d.dir, uintptr(unsafe.Pointer(&dirent)), uintptr(unsafe.Pointer(&entptr))); res != 0 {
+			return names, wrapSyscallError("readdir", syscall.Errno(res))
+		}
+		if entptr == 0 { // EOF
+			break
+		}
+		if dirent.Ino == 0 {
+			continue
+		}
+		name := (*[len(syscall.Dirent{}.Name)]byte)(unsafe.Pointer(&dirent.Name))[:]
+		for i, c := range name {
+			if c == 0 {
+				name = name[:i]
+				break
+			}
+		}
+		// Check for useless names before allocating a string.
+		if string(name) == "." || string(name) == ".." {
+			continue
+		}
+		names = append(names, string(name))
+		runtime.KeepAlive(f)
+	}
+	if n >= 0 && len(names) == 0 {
+		return names, io.EOF
+	}
+	return names, nil
+}
+
+// Implemented in syscall/syscall_darwin.go.
+
+//go:linkname closedir syscall.closedir
+func closedir(dir uintptr) (err error)
+
+//go:linkname readdir_r syscall.readdir_r
+func readdir_r(dir, entry, result uintptr) (res int)

src/os/dir_unix.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris
+// +build aix darwin,!arm,!arm64 dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris
 
 package os
 
@@ -12,37 +12,19 @@ import (
 	"syscall"
 )
 
+// Auxiliary information if the File describes a directory
+type dirInfo struct {
+	buf  []byte // buffer for directory I/O
+	nbuf int    // length of buf; return value from Getdirentries
+	bufp int    // location of next record in buf.
+}
+
 const (
 	// More than 5760 to work around https://golang.org/issue/24015.
 	blockSize = 8192
 )
 
-func (f *File) readdir(n int) (fi []FileInfo, err error) {
-	dirname := f.name
-	if dirname == "" {
-		dirname = "."
-	}
-	names, err := f.Readdirnames(n)
-	fi = make([]FileInfo, 0, len(names))
-	for _, filename := range names {
-		fip, lerr := lstat(dirname + "/" + filename)
-		if IsNotExist(lerr) {
-			// File disappeared between readdir + stat.
-			// Just treat it as if it didn't exist.
-			continue
-		}
-		if lerr != nil {
-			return fi, lerr
-		}
-		fi = append(fi, fip)
-	}
-	if len(fi) == 0 && err == nil && n > 0 {
-		// Per File.Readdir, the slice must be non-empty or err
-		// must be non-nil if n > 0.
-		err = io.EOF
-	}
-	return fi, err
-}
+func (d *dirInfo) close() {}
 
 func (f *File) readdirnames(n int) (names []string, err error) {
 	// If this file has no dirinfo, create one.

src/os/file_unix.go

@@ -9,6 +9,7 @@ package os
 import (
 	"internal/poll"
 	"internal/syscall/unix"
+	"io"
 	"runtime"
 	"syscall"
 )
@@ -155,13 +156,6 @@ func newFile(fd uintptr, name string, kind newFileKind) *File {
 	return f
 }
 
-// Auxiliary information if the File describes a directory
-type dirInfo struct {
-	buf  []byte // buffer for directory I/O
-	nbuf int    // length of buf; return value from Getdirentries
-	bufp int    // location of next record in buf.
-}
-
 // epipecheck raises SIGPIPE if we get an EPIPE error on standard
 // output or standard error. See the SIGPIPE docs in os/signal, and
 // issue 11845.
@@ -230,6 +224,9 @@ func (file *file) close() error {
 	if file == nil {
 		return syscall.EINVAL
 	}
+	if file.dirinfo != nil {
+		file.dirinfo.close()
+	}
 	var err error
 	if e := file.pfd.Close(); e != nil {
 		if e == poll.ErrFileClosing {
@@ -358,3 +355,30 @@ func Symlink(oldname, newname string) error {
 	}
 	return nil
 }
+
+func (f *File) readdir(n int) (fi []FileInfo, err error) {
+	dirname := f.name
+	if dirname == "" {
+		dirname = "."
+	}
+	names, err := f.Readdirnames(n)
+	fi = make([]FileInfo, 0, len(names))
+	for _, filename := range names {
+		fip, lerr := lstat(dirname + "/" + filename)
+		if IsNotExist(lerr) {
+			// File disappeared between readdir + stat.
+			// Just treat it as if it didn't exist.
+			continue
+		}
+		if lerr != nil {
+			return fi, lerr
+		}
+		fi = append(fi, fip)
+	}
+	if len(fi) == 0 && err == nil && n > 0 {
+		// Per File.Readdir, the slice must be non-empty or err
+		// must be non-nil if n > 0.
+		err = io.EOF
+	}
+	return fi, err
+}

src/runtime/sys_darwin_32.go

@@ -19,3 +19,14 @@ func syscall_syscall9(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, e
 	return
 }
 func syscall9()
+
+//go:linkname syscall_syscallPtr syscall.syscallPtr
+//go:nosplit
+//go:cgo_unsafe_args
+func syscall_syscallPtr(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
+	entersyscallblock()
+	libcCall(unsafe.Pointer(funcPC(syscallPtr)), unsafe.Pointer(&fn))
+	exitsyscall()
+	return
+}
+func syscallPtr()

src/runtime/sys_darwin_386.s

@@ -675,6 +675,11 @@ ok:
 	POPL	BP
 	RET
 
+// Not used on 386.
+TEXT runtime·syscallPtr(SB),NOSPLIT,$0
+	MOVL	$0xf1, 0xf1  // crash
+	RET
+
 // syscall6 calls a function in libc on behalf of the syscall package.
 // syscall6 takes a pointer to a struct like:
 // struct {

src/runtime/sys_darwin_64.go

@@ -19,3 +19,14 @@ func syscall_syscallX(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
 	return
 }
 func syscallX()
+
+//go:linkname syscall_syscallXPtr syscall.syscallXPtr
+//go:nosplit
+//go:cgo_unsafe_args
+func syscall_syscallXPtr(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
+	entersyscallblock()
+	libcCall(unsafe.Pointer(funcPC(syscallXPtr)), unsafe.Pointer(&fn))
+	exitsyscall()
+	return
+}
+func syscallXPtr()

src/runtime/sys_darwin_amd64.s

@@ -637,6 +637,11 @@ ok:
 	POPQ	BP
 	RET
 
+// Not used on amd64.
+TEXT runtime·syscallXPtr(SB),NOSPLIT,$0
+	MOVL	$0xf1, 0xf1  // crash
+	RET
+
 // syscall6 calls a function in libc on behalf of the syscall package.
 // syscall6 takes a pointer to a struct like:
 // struct {

src/runtime/sys_darwin_arm.s

@@ -417,6 +417,29 @@ TEXT runtime·syscall(SB),NOSPLIT,$0
 ok:
 	RET
 
+// syscallPtr is like syscall except the libc function reports an
+// error by returning NULL.
+TEXT runtime·syscallPtr(SB),NOSPLIT,$0
+	MOVW.W	R0, -4(R13)	// push structure pointer
+	MOVW	0(R0), R12	// fn
+	MOVW	8(R0), R1	// a2
+	MOVW	12(R0), R2	// a3
+	MOVW	4(R0), R0	// a1
+	BL	(R12)
+	MOVW.P	4(R13), R2	// pop structure pointer
+	MOVW	R0, 16(R2)	// save r1
+	MOVW	R1, 20(R2)	// save r2
+	MOVW	$0, R3
+	CMP	R0, R3
+	BNE	ok
+	MOVW.W	R2, -4(R13)	// push structure pointer
+	BL	libc_error(SB)
+	MOVW	(R0), R0
+	MOVW.P	4(R13), R2	// pop structure pointer
+	MOVW	R0, 24(R2)	// save err
+ok:
+	RET
+
 // syscall6 calls a function in libc on behalf of the syscall package.
 // syscall6 takes a pointer to a struct like:
 // struct {

src/runtime/sys_darwin_arm64.s

@@ -465,6 +465,34 @@ TEXT runtime·syscallX(SB),NOSPLIT,$0
 ok:
 	RET
 
+// syscallXPtr is like syscallX except that the libc function reports an
+// error by returning NULL.
+TEXT runtime·syscallXPtr(SB),NOSPLIT,$0
+	SUB	$16, RSP	// push structure pointer
+	MOVD	R0, (RSP)
+
+	MOVD	0(R0), R12	// fn
+	MOVD	16(R0), R1	// a2
+	MOVD	24(R0), R2	// a3
+	MOVD	8(R0), R0	// a1
+	BL	(R12)
+
+	MOVD	(RSP), R2	// pop structure pointer
+	ADD	$16, RSP
+	MOVD	R0, 32(R2)	// save r1
+	MOVD	R1, 40(R2)	// save r2
+	CMP	$0, R0
+	BNE	ok
+	SUB	$16, RSP	// push structure pointer
+	MOVD	R2, (RSP)
+	BL	libc_error(SB)
+	MOVW	(R0), R0
+	MOVD	(RSP), R2	// pop structure pointer
+	ADD	$16, RSP
+	MOVD	R0, 48(R2)	// save err
+ok:
+	RET
+
 // syscall6 calls a function in libc on behalf of the syscall package.
 // syscall6 takes a pointer to a struct like:
 // struct {

src/syscall/dirent_bsd_test.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd netbsd openbsd
+// +build darwin,!arm,!arm64 dragonfly freebsd netbsd openbsd
 
 package syscall_test
 

src/syscall/syscall_darwin.go

@@ -270,7 +270,6 @@ func Kill(pid int, signum Signal) (err error) { return kill(pid, int(signum), 1)
 //sys	Fsync(fd int) (err error)
 //  Fsync is not called for os.File.Sync(). Please see internal/poll/fd_fsync_darwin.go
 //sys	Ftruncate(fd int, length int64) (err error)
-//sys	Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) = SYS___getdirentries64
 //sys	Getdtablesize() (size int)
 //sysnb	Getegid() (egid int)
 //sysnb	Geteuid() (uid int)

src/syscall/syscall_darwin_386.go

@@ -16,6 +16,7 @@ func setTimeval(sec, usec int64) Timeval {
 
 //sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_fstat64
 //sys	Fstatfs(fd int, stat *Statfs_t) (err error) = SYS_fstatfs64
+//sys	Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) = SYS___getdirentries64
 //sysnb	Gettimeofday(tp *Timeval) (err error)
 //sys	Lstat(path string, stat *Stat_t) (err error) = SYS_lstat64
 //sys	Stat(path string, stat *Stat_t) (err error) = SYS_stat64

src/syscall/syscall_darwin_amd64.go

@@ -16,6 +16,7 @@ func setTimeval(sec, usec int64) Timeval {
 
 //sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_fstat64
 //sys	Fstatfs(fd int, stat *Statfs_t) (err error) = SYS_fstatfs64
+//sys	Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) = SYS___getdirentries64
 //sysnb	Gettimeofday(tp *Timeval) (err error)
 //sys	Lstat(path string, stat *Stat_t) (err error) = SYS_lstat64
 //sys	Stat(path string, stat *Stat_t) (err error) = SYS_stat64

src/syscall/syscall_darwin_arm.go

@@ -14,14 +14,20 @@ func setTimeval(sec, usec int64) Timeval {
 	return Timeval{Sec: int32(sec), Usec: int32(usec)}
 }
 
+//sys	closedir(dir uintptr) (err error)
 //sys	Fstat(fd int, stat *Stat_t) (err error)
 //sys	Fstatfs(fd int, stat *Statfs_t) (err error)
 //sysnb	Gettimeofday(tp *Timeval) (err error)
 //sys	Lstat(path string, stat *Stat_t) (err error)
+//sys	readdir_r(dir uintptr, entry uintptr, result uintptr) (res int)
 //sys	Stat(path string, stat *Stat_t) (err error)
 //sys	Statfs(path string, stat *Statfs_t) (err error)
 //sys   fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
 
+func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
+	return 0, ENOSYS
+}
+
 func SetKevent(k *Kevent_t, fd, mode, flags int) {
 	k.Ident = uint32(fd)
 	k.Filter = int16(mode)
@@ -58,7 +64,22 @@ func libc_sendfile_trampoline()
 //go:linkname libc_sendfile libc_sendfile
 //go:cgo_import_dynamic libc_sendfile sendfile "/usr/lib/libSystem.B.dylib"
 
+func fdopendir(fd int) (dir uintptr, err error) {
+	r0, _, e1 := syscallPtr(funcPC(libc_fdopendir_trampoline), uintptr(fd), 0, 0)
+	dir = uintptr(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_fdopendir_trampoline()
+
+//go:linkname libc_fdopendir libc_fdopendir
+//go:cgo_import_dynamic libc_fdopendir fdopendir "/usr/lib/libSystem.B.dylib"
+
 // Implemented in the runtime package (runtime/sys_darwin_32.go)
+func syscallPtr(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
 func syscall9(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno)
 
 func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) // sic

src/syscall/syscall_darwin_arm64.go

@@ -14,14 +14,20 @@ func setTimeval(sec, usec int64) Timeval {
 	return Timeval{Sec: int64(sec), Usec: int32(usec)}
 }
 
+//sys	closedir(dir uintptr) (err error)
 //sys	Fstat(fd int, stat *Stat_t) (err error)
 //sys	Fstatfs(fd int, stat *Statfs_t) (err error)
 //sysnb	Gettimeofday(tp *Timeval) (err error)
 //sys	Lstat(path string, stat *Stat_t) (err error)
+//sys	readdir_r(dirp uintptr, entry uintptr, result uintptr) (res int)
 //sys	Stat(path string, stat *Stat_t) (err error)
 //sys	Statfs(path string, stat *Statfs_t) (err error)
 //sys   fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
 
+func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
+	return 0, ENOSYS
+}
+
 func SetKevent(k *Kevent_t, fd, mode, flags int) {
 	k.Ident = uint64(fd)
 	k.Filter = int16(mode)
@@ -58,7 +64,22 @@ func libc_sendfile_trampoline()
 //go:linkname libc_sendfile libc_sendfile
 //go:cgo_import_dynamic libc_sendfile sendfile "/usr/lib/libSystem.B.dylib"
 
+func fdopendir(fd int) (dir uintptr, err error) {
+	r0, _, e1 := syscallXPtr(funcPC(libc_fdopendir_trampoline), uintptr(fd), 0, 0)
+	dir = uintptr(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_fdopendir_trampoline()
+
+//go:linkname libc_fdopendir libc_fdopendir
+//go:cgo_import_dynamic libc_fdopendir fdopendir "/usr/lib/libSystem.B.dylib"
+
 // Implemented in the runtime package (runtime/sys_darwin_64.go)
 func syscallX(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
+func syscallXPtr(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
 
 func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) // sic

src/syscall/zsyscall_darwin_386.go

@@ -679,27 +679,6 @@ func libc_ftruncate_trampoline()
 //go:cgo_import_dynamic libc_ftruncate ftruncate "/usr/lib/libSystem.B.dylib"
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(buf) > 0 {
-		_p0 = unsafe.Pointer(&buf[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall6(funcPC(libc___getdirentries64_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc___getdirentries64_trampoline()
-
-//go:linkname libc___getdirentries64 libc___getdirentries64
-//go:cgo_import_dynamic libc___getdirentries64 __getdirentries64 "/usr/lib/libSystem.B.dylib"
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func Getdtablesize() (size int) {
 	r0, _, _ := syscall(funcPC(libc_getdtablesize_trampoline), 0, 0, 0)
 	size = int(r0)
@@ -1868,6 +1847,27 @@ func libc_fstatfs64_trampoline()
 //go:cgo_import_dynamic libc_fstatfs64 fstatfs64 "/usr/lib/libSystem.B.dylib"
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(buf) > 0 {
+		_p0 = unsafe.Pointer(&buf[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := syscall6(funcPC(libc___getdirentries64_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc___getdirentries64_trampoline()
+
+//go:linkname libc___getdirentries64 libc___getdirentries64
+//go:cgo_import_dynamic libc___getdirentries64 __getdirentries64 "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Gettimeofday(tp *Timeval) (err error) {
 	_, _, e1 := rawSyscall(funcPC(libc_gettimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
 	if e1 != 0 {

src/syscall/zsyscall_darwin_386.s

@@ -95,8 +95,6 @@ TEXT ·libc_fsync_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fsync(SB)
 TEXT ·libc_ftruncate_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_ftruncate(SB)
-TEXT ·libc___getdirentries64_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc___getdirentries64(SB)
 TEXT ·libc_getdtablesize_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_getdtablesize(SB)
 TEXT ·libc_getegid_trampoline(SB),NOSPLIT,$0-0
@@ -237,6 +235,8 @@ TEXT ·libc_fstat64_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fstat64(SB)
 TEXT ·libc_fstatfs64_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fstatfs64(SB)
+TEXT ·libc___getdirentries64_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc___getdirentries64(SB)
 TEXT ·libc_gettimeofday_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_gettimeofday(SB)
 TEXT ·libc_lstat64_trampoline(SB),NOSPLIT,$0-0

src/syscall/zsyscall_darwin_amd64.go

@@ -679,27 +679,6 @@ func libc_ftruncate_trampoline()
 //go:cgo_import_dynamic libc_ftruncate ftruncate "/usr/lib/libSystem.B.dylib"
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(buf) > 0 {
-		_p0 = unsafe.Pointer(&buf[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall6(funcPC(libc___getdirentries64_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc___getdirentries64_trampoline()
-
-//go:linkname libc___getdirentries64 libc___getdirentries64
-//go:cgo_import_dynamic libc___getdirentries64 __getdirentries64 "/usr/lib/libSystem.B.dylib"
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func Getdtablesize() (size int) {
 	r0, _, _ := syscall(funcPC(libc_getdtablesize_trampoline), 0, 0, 0)
 	size = int(r0)
@@ -1868,6 +1847,27 @@ func libc_fstatfs64_trampoline()
 //go:cgo_import_dynamic libc_fstatfs64 fstatfs64 "/usr/lib/libSystem.B.dylib"
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(buf) > 0 {
+		_p0 = unsafe.Pointer(&buf[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := syscall6(funcPC(libc___getdirentries64_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc___getdirentries64_trampoline()
+
+//go:linkname libc___getdirentries64 libc___getdirentries64
+//go:cgo_import_dynamic libc___getdirentries64 __getdirentries64 "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Gettimeofday(tp *Timeval) (err error) {
 	_, _, e1 := rawSyscall(funcPC(libc_gettimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
 	if e1 != 0 {

src/syscall/zsyscall_darwin_amd64.s

@@ -95,8 +95,6 @@ TEXT ·libc_fsync_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fsync(SB)
 TEXT ·libc_ftruncate_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_ftruncate(SB)
-TEXT ·libc___getdirentries64_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc___getdirentries64(SB)
 TEXT ·libc_getdtablesize_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_getdtablesize(SB)
 TEXT ·libc_getegid_trampoline(SB),NOSPLIT,$0-0
@@ -237,6 +235,8 @@ TEXT ·libc_fstat64_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fstat64(SB)
 TEXT ·libc_fstatfs64_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fstatfs64(SB)
+TEXT ·libc___getdirentries64_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc___getdirentries64(SB)
 TEXT ·libc_gettimeofday_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_gettimeofday(SB)
 TEXT ·libc_lstat64_trampoline(SB),NOSPLIT,$0-0

src/syscall/zsyscall_darwin_arm.go

@@ -679,27 +679,6 @@ func libc_ftruncate_trampoline()
 //go:cgo_import_dynamic libc_ftruncate ftruncate "/usr/lib/libSystem.B.dylib"
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(buf) > 0 {
-		_p0 = unsafe.Pointer(&buf[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall6(funcPC(libc___getdirentries64_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc___getdirentries64_trampoline()
-
-//go:linkname libc___getdirentries64 libc___getdirentries64
-//go:cgo_import_dynamic libc___getdirentries64 __getdirentries64 "/usr/lib/libSystem.B.dylib"
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func Getdtablesize() (size int) {
 	r0, _, _ := syscall(funcPC(libc_getdtablesize_trampoline), 0, 0, 0)
 	size = int(r0)
@@ -1840,6 +1819,20 @@ func libc_openat_trampoline()
 //go:cgo_import_dynamic libc_openat openat "/usr/lib/libSystem.B.dylib"
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func closedir(dir uintptr) (err error) {
+	_, _, e1 := syscall(funcPC(libc_closedir_trampoline), uintptr(dir), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_closedir_trampoline()
+
+//go:linkname libc_closedir libc_closedir
+//go:cgo_import_dynamic libc_closedir closedir "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Fstat(fd int, stat *Stat_t) (err error) {
 	_, _, e1 := syscall(funcPC(libc_fstat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
@@ -1901,6 +1894,18 @@ func libc_lstat_trampoline()
 //go:cgo_import_dynamic libc_lstat lstat "/usr/lib/libSystem.B.dylib"
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readdir_r(dir uintptr, entry uintptr, result uintptr) (res int) {
+	r0, _, _ := syscall(funcPC(libc_readdir_r_trampoline), uintptr(dir), uintptr(entry), uintptr(result))
+	res = int(r0)
+	return
+}
+
+func libc_readdir_r_trampoline()
+
+//go:linkname libc_readdir_r libc_readdir_r
+//go:cgo_import_dynamic libc_readdir_r readdir_r "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Stat(path string, stat *Stat_t) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

src/syscall/zsyscall_darwin_arm.s

@@ -9,6 +9,8 @@ TEXT ·libc_setattrlist_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_setattrlist(SB)
 TEXT ·libc_sendfile_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_sendfile(SB)
+TEXT ·libc_fdopendir_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_fdopendir(SB)
 TEXT ·libc_getgroups_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_getgroups(SB)
 TEXT ·libc_setgroups_trampoline(SB),NOSPLIT,$0-0
@@ -95,8 +97,6 @@ TEXT ·libc_fsync_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fsync(SB)
 TEXT ·libc_ftruncate_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_ftruncate(SB)
-TEXT ·libc___getdirentries64_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc___getdirentries64(SB)
 TEXT ·libc_getdtablesize_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_getdtablesize(SB)
 TEXT ·libc_getegid_trampoline(SB),NOSPLIT,$0-0
@@ -233,6 +233,8 @@ TEXT ·libc_unlinkat_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_unlinkat(SB)
 TEXT ·libc_openat_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_openat(SB)
+TEXT ·libc_closedir_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_closedir(SB)
 TEXT ·libc_fstat_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fstat(SB)
 TEXT ·libc_fstatfs_trampoline(SB),NOSPLIT,$0-0
@@ -241,6 +243,8 @@ TEXT ·libc_gettimeofday_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_gettimeofday(SB)
 TEXT ·libc_lstat_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_lstat(SB)
+TEXT ·libc_readdir_r_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_readdir_r(SB)
 TEXT ·libc_stat_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_stat(SB)
 TEXT ·libc_statfs_trampoline(SB),NOSPLIT,$0-0

src/syscall/zsyscall_darwin_arm64.go

@@ -679,27 +679,6 @@ func libc_ftruncate_trampoline()
 //go:cgo_import_dynamic libc_ftruncate ftruncate "/usr/lib/libSystem.B.dylib"
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(buf) > 0 {
-		_p0 = unsafe.Pointer(&buf[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall6(funcPC(libc___getdirentries64_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc___getdirentries64_trampoline()
-
-//go:linkname libc___getdirentries64 libc___getdirentries64
-//go:cgo_import_dynamic libc___getdirentries64 __getdirentries64 "/usr/lib/libSystem.B.dylib"
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func Getdtablesize() (size int) {
 	r0, _, _ := syscall(funcPC(libc_getdtablesize_trampoline), 0, 0, 0)
 	size = int(r0)
@@ -1840,6 +1819,20 @@ func libc_openat_trampoline()
 //go:cgo_import_dynamic libc_openat openat "/usr/lib/libSystem.B.dylib"
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func closedir(dir uintptr) (err error) {
+	_, _, e1 := syscall(funcPC(libc_closedir_trampoline), uintptr(dir), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_closedir_trampoline()
+
+//go:linkname libc_closedir libc_closedir
+//go:cgo_import_dynamic libc_closedir closedir "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Fstat(fd int, stat *Stat_t) (err error) {
 	_, _, e1 := syscall(funcPC(libc_fstat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
@@ -1901,6 +1894,18 @@ func libc_lstat_trampoline()
 //go:cgo_import_dynamic libc_lstat lstat "/usr/lib/libSystem.B.dylib"
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readdir_r(dirp uintptr, entry uintptr, result uintptr) (res int) {
+	r0, _, _ := syscall(funcPC(libc_readdir_r_trampoline), uintptr(dirp), uintptr(entry), uintptr(result))
+	res = int(r0)
+	return
+}
+
+func libc_readdir_r_trampoline()
+
+//go:linkname libc_readdir_r libc_readdir_r
+//go:cgo_import_dynamic libc_readdir_r readdir_r "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Stat(path string, stat *Stat_t) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

src/syscall/zsyscall_darwin_arm64.s

@@ -9,6 +9,8 @@ TEXT ·libc_setattrlist_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_setattrlist(SB)
 TEXT ·libc_sendfile_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_sendfile(SB)
+TEXT ·libc_fdopendir_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_fdopendir(SB)
 TEXT ·libc_getgroups_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_getgroups(SB)
 TEXT ·libc_setgroups_trampoline(SB),NOSPLIT,$0-0
@@ -95,8 +97,6 @@ TEXT ·libc_fsync_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fsync(SB)
 TEXT ·libc_ftruncate_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_ftruncate(SB)
-TEXT ·libc___getdirentries64_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc___getdirentries64(SB)
 TEXT ·libc_getdtablesize_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_getdtablesize(SB)
 TEXT ·libc_getegid_trampoline(SB),NOSPLIT,$0-0
@@ -233,6 +233,8 @@ TEXT ·libc_unlinkat_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_unlinkat(SB)
 TEXT ·libc_openat_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_openat(SB)
+TEXT ·libc_closedir_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_closedir(SB)
 TEXT ·libc_fstat_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fstat(SB)
 TEXT ·libc_fstatfs_trampoline(SB),NOSPLIT,$0-0
@@ -241,6 +243,8 @@ TEXT ·libc_gettimeofday_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_gettimeofday(SB)
 TEXT ·libc_lstat_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_lstat(SB)
+TEXT ·libc_readdir_r_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_readdir_r(SB)
 TEXT ·libc_stat_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_stat(SB)
 TEXT ·libc_statfs_trampoline(SB),NOSPLIT,$0-0