internal/syscall: move to unix subdirectory

Move the single file from internal/syscall to internal/syscall/unix,
to match the golang.org/x/sys layout.

Change-Id: I2fb2832b4cb22efc7666bd276f5401ac3e73dc40
Reviewed-on: https://go-review.googlesource.com/8972
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

1 files changed, 0 insertions, 58 deletions

diff --git a/src/internal/syscall/getrandom_linux.go b/src/internal/syscall/getrandom_linux.go
deleted file mode 100644
index 36d5a1ccb0..0000000000
--- a/src/internal/syscall/getrandom_linux.go
+++ /dev/null
@@ -1,58 +0,0 @@
-// Copyright 2014 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.
-
-package syscall
-
-import (
-	"runtime"
-	"sync/atomic"
-	stdsyscall "syscall"
-	"unsafe"
-)
-
-var randomTrap = map[string]uintptr{
-	"386":     355,
-	"amd64":   318,
-	"arm":     384,
-	"ppc64":   359,
-	"ppc64le": 359,
-}[runtime.GOARCH]
-
-var randomUnsupported int32 // atomic
-
-// GetRandomFlag is a flag supported by the getrandom system call.
-type GetRandomFlag uintptr
-
-const (
-	// GRND_NONBLOCK means return EAGAIN rather than blocking.
-	GRND_NONBLOCK GetRandomFlag = 0x0001
-
-	// GRND_RANDOM means use the /dev/random pool instead of /dev/urandom.
-	GRND_RANDOM GetRandomFlag = 0x0002
-)
-
-// GetRandom calls the Linux getrandom system call.
-// See https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c6e9d6f38894798696f23c8084ca7edbf16ee895
-func GetRandom(p []byte, flags GetRandomFlag) (n int, err error) {
-	if randomTrap == 0 {
-		return 0, stdsyscall.ENOSYS
-	}
-	if len(p) == 0 {
-		return 0, nil
-	}
-	if atomic.LoadInt32(&randomUnsupported) != 0 {
-		return 0, stdsyscall.ENOSYS
-	}
-	r1, _, errno := stdsyscall.Syscall(randomTrap,
-		uintptr(unsafe.Pointer(&p[0])),
-		uintptr(len(p)),
-		uintptr(flags))
-	if errno != 0 {
-		if errno == stdsyscall.ENOSYS {
-			atomic.StoreInt32(&randomUnsupported, 1)
-		}
-		return 0, errno
-	}
-	return int(r1), nil
-}