unix: fix build with Go 1.12 on darwin

CL 250437 broke the build with Go 1.12 on darwin, due to
SYS_GETDIRENTRIES64 being removed. However, this is still needed to
implement Getdirentries for Go 1.12 because it does not provide
syscall_syscallPtr for fdopendir. Thus, add _SYS_GETDIRENTRIES64 as an
unexported const.

Change-Id: I52b420095deeb50d7fac002702dfce01cbf34bb7
Reviewed-on: https://go-review.googlesource.com/c/sys/+/251317
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Tobias Klauser
2020-08-28 14:07:00 +02:00
committed by Tobias Klauser
parent c663848e9a
commit 157a740278

View File

@@ -10,6 +10,8 @@ import (
"unsafe"
)
const _SYS_GETDIRENTRIES64 = 344
func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
// To implement this using libSystem we'd need syscall_syscallPtr for
// fdopendir. However, syscallPtr was only added in Go 1.13, so we fall
@@ -20,7 +22,7 @@ func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
} else {
p = unsafe.Pointer(&_zero)
}
r0, _, e1 := Syscall6(SYS_GETDIRENTRIES64, uintptr(fd), uintptr(p), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)
r0, _, e1 := Syscall6(_SYS_GETDIRENTRIES64, uintptr(fd), uintptr(p), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)
n = int(r0)
if e1 != 0 {
return n, errnoErr(e1)