Adding upstream version 1.16.10.upstream/1.16.10upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

35 files changed, 750 insertions, 0 deletions

diff --git a/src/internal/syscall/unix/asm_aix_ppc64.s b/src/internal/syscall/unix/asm_aix_ppc64.s
new file mode 100644
index 0000000..9e82e3e
--- /dev/null
+++ b/src/internal/syscall/unix/asm_aix_ppc64.s
@@ -0,0 +1,12 @@
+// 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.
+
+#include "textflag.h"
+
+//
+// System calls for aix/ppc64 are implemented in syscall/syscall_aix.go
+//
+
+TEXT ·syscall6(SB),NOSPLIT,$0
+	JMP	syscall·syscall6(SB)
diff --git a/src/internal/syscall/unix/asm_solaris.s b/src/internal/syscall/unix/asm_solaris.s
new file mode 100644
index 0000000..2057338
--- /dev/null
+++ b/src/internal/syscall/unix/asm_solaris.s
@@ -0,0 +1,10 @@
+// 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.
+
+#include "textflag.h"
+
+// System calls for Solaris are implemented in runtime/syscall_solaris.go
+
+TEXT ·syscall6(SB),NOSPLIT,$0-88
+	JMP	syscall·sysvicall6(SB)
diff --git a/src/internal/syscall/unix/at.go b/src/internal/syscall/unix/at.go
new file mode 100644
index 0000000..f857d68
--- /dev/null
+++ b/src/internal/syscall/unix/at.go
@@ -0,0 +1,58 @@
+// 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 linux openbsd netbsd dragonfly
+
+package unix
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func Unlinkat(dirfd int, path string, flags int) error {
+	var p *byte
+	p, err := syscall.BytePtrFromString(path)
+	if err != nil {
+		return err
+	}
+
+	_, _, errno := syscall.Syscall(unlinkatTrap, uintptr(dirfd), uintptr(unsafe.Pointer(p)), uintptr(flags))
+	if errno != 0 {
+		return errno
+	}
+
+	return nil
+}
+
+func Openat(dirfd int, path string, flags int, perm uint32) (int, error) {
+	var p *byte
+	p, err := syscall.BytePtrFromString(path)
+	if err != nil {
+		return 0, err
+	}
+
+	fd, _, errno := syscall.Syscall6(openatTrap, uintptr(dirfd), uintptr(unsafe.Pointer(p)), uintptr(flags), uintptr(perm), 0, 0)
+	if errno != 0 {
+		return 0, errno
+	}
+
+	return int(fd), nil
+}
+
+func Fstatat(dirfd int, path string, stat *syscall.Stat_t, flags int) error {
+	var p *byte
+	p, err := syscall.BytePtrFromString(path)
+	if err != nil {
+		return err
+	}
+
+	_, _, errno := syscall.Syscall6(fstatatTrap, uintptr(dirfd), uintptr(unsafe.Pointer(p)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
+	if errno != 0 {
+		return errno
+	}
+
+	return nil
+
+}
diff --git a/src/internal/syscall/unix/at_aix.go b/src/internal/syscall/unix/at_aix.go
new file mode 100644
index 0000000..425df98
--- /dev/null
+++ b/src/internal/syscall/unix/at_aix.go
@@ -0,0 +1,14 @@
+// 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.
+
+package unix
+
+//go:cgo_import_dynamic libc_fstatat fstatat "libc.a/shr_64.o"
+//go:cgo_import_dynamic libc_openat openat "libc.a/shr_64.o"
+//go:cgo_import_dynamic libc_unlinkat unlinkat "libc.a/shr_64.o"
+
+const (
+	AT_REMOVEDIR        = 0x1
+	AT_SYMLINK_NOFOLLOW = 0x1
+)
diff --git a/src/internal/syscall/unix/at_darwin.go b/src/internal/syscall/unix/at_darwin.go
new file mode 100644
index 0000000..a88a27e
--- /dev/null
+++ b/src/internal/syscall/unix/at_darwin.go
@@ -0,0 +1,31 @@
+// 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.
+
+package unix
+
+import (
+	"syscall"
+	_ "unsafe" // for linkname
+)
+
+func Unlinkat(dirfd int, path string, flags int) error {
+	return unlinkat(dirfd, path, flags)
+}
+
+func Openat(dirfd int, path string, flags int, perm uint32) (int, error) {
+	return openat(dirfd, path, flags, perm)
+}
+
+func Fstatat(dirfd int, path string, stat *syscall.Stat_t, flags int) error {
+	return fstatat(dirfd, path, stat, flags)
+}
+
+//go:linkname unlinkat syscall.unlinkat
+func unlinkat(dirfd int, path string, flags int) error
+
+//go:linkname openat syscall.openat
+func openat(dirfd int, path string, flags int, perm uint32) (int, error)
+
+//go:linkname fstatat syscall.fstatat
+func fstatat(dirfd int, path string, stat *syscall.Stat_t, flags int) error
diff --git a/src/internal/syscall/unix/at_freebsd.go b/src/internal/syscall/unix/at_freebsd.go
new file mode 100644
index 0000000..e171f4d
--- /dev/null
+++ b/src/internal/syscall/unix/at_freebsd.go
@@ -0,0 +1,47 @@
+// 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.
+
+package unix
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+const (
+	AT_REMOVEDIR        = 0x800
+	AT_SYMLINK_NOFOLLOW = 0x200
+)
+
+func Unlinkat(dirfd int, path string, flags int) error {
+	p, err := syscall.BytePtrFromString(path)
+	if err != nil {
+		return err
+	}
+
+	_, _, errno := syscall.Syscall(syscall.SYS_UNLINKAT, uintptr(dirfd), uintptr(unsafe.Pointer(p)), uintptr(flags))
+	if errno != 0 {
+		return errno
+	}
+
+	return nil
+}
+
+func Openat(dirfd int, path string, flags int, perm uint32) (int, error) {
+	p, err := syscall.BytePtrFromString(path)
+	if err != nil {
+		return 0, err
+	}
+
+	fd, _, errno := syscall.Syscall6(syscall.SYS_OPENAT, uintptr(dirfd), uintptr(unsafe.Pointer(p)), uintptr(flags), uintptr(perm), 0, 0)
+	if errno != 0 {
+		return 0, errno
+	}
+
+	return int(fd), nil
+}
+
+func Fstatat(dirfd int, path string, stat *syscall.Stat_t, flags int) error {
+	return syscall.Fstatat(dirfd, path, stat, flags)
+}
diff --git a/src/internal/syscall/unix/at_libc.go b/src/internal/syscall/unix/at_libc.go
new file mode 100644
index 0000000..6c3a8c9
--- /dev/null
+++ b/src/internal/syscall/unix/at_libc.go
@@ -0,0 +1,64 @@
+// 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 aix solaris
+
+package unix
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+//go:linkname procFstatat libc_fstatat
+//go:linkname procOpenat libc_openat
+//go:linkname procUnlinkat libc_unlinkat
+
+var (
+	procFstatat,
+	procOpenat,
+	procUnlinkat uintptr
+)
+
+func Unlinkat(dirfd int, path string, flags int) error {
+	p, err := syscall.BytePtrFromString(path)
+	if err != nil {
+		return err
+	}
+
+	_, _, errno := syscall6(uintptr(unsafe.Pointer(&procUnlinkat)), 3, uintptr(dirfd), uintptr(unsafe.Pointer(p)), uintptr(flags), 0, 0, 0)
+	if errno != 0 {
+		return errno
+	}
+
+	return nil
+}
+
+func Openat(dirfd int, path string, flags int, perm uint32) (int, error) {
+	p, err := syscall.BytePtrFromString(path)
+	if err != nil {
+		return 0, err
+	}
+
+	fd, _, errno := syscall6(uintptr(unsafe.Pointer(&procOpenat)), 4, uintptr(dirfd), uintptr(unsafe.Pointer(p)), uintptr(flags), uintptr(perm), 0, 0)
+	if errno != 0 {
+		return 0, errno
+	}
+
+	return int(fd), nil
+}
+
+func Fstatat(dirfd int, path string, stat *syscall.Stat_t, flags int) error {
+	p, err := syscall.BytePtrFromString(path)
+	if err != nil {
+		return err
+	}
+
+	_, _, errno := syscall6(uintptr(unsafe.Pointer(&procFstatat)), 4, uintptr(dirfd), uintptr(unsafe.Pointer(p)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
+	if errno != 0 {
+		return errno
+	}
+
+	return nil
+}
diff --git a/src/internal/syscall/unix/at_solaris.go b/src/internal/syscall/unix/at_solaris.go
new file mode 100644
index 0000000..e917c4f
--- /dev/null
+++ b/src/internal/syscall/unix/at_solaris.go
@@ -0,0 +1,19 @@
+// 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.
+
+package unix
+
+import "syscall"
+
+// Implemented as sysvicall6 in runtime/syscall_solaris.go.
+func syscall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno)
+
+//go:cgo_import_dynamic libc_fstatat fstatat "libc.so"
+//go:cgo_import_dynamic libc_openat openat "libc.so"
+//go:cgo_import_dynamic libc_unlinkat unlinkat "libc.so"
+
+const (
+	AT_REMOVEDIR        = 0x1
+	AT_SYMLINK_NOFOLLOW = 0x1000
+)
diff --git a/src/internal/syscall/unix/at_sysnum_darwin.go b/src/internal/syscall/unix/at_sysnum_darwin.go
new file mode 100644
index 0000000..aaaaa47
--- /dev/null
+++ b/src/internal/syscall/unix/at_sysnum_darwin.go
@@ -0,0 +1,8 @@
+// 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.
+
+package unix
+
+const AT_REMOVEDIR = 0x80
+const AT_SYMLINK_NOFOLLOW = 0x0020
diff --git a/src/internal/syscall/unix/at_sysnum_dragonfly.go b/src/internal/syscall/unix/at_sysnum_dragonfly.go
new file mode 100644
index 0000000..cec9abc
--- /dev/null
+++ b/src/internal/syscall/unix/at_sysnum_dragonfly.go
@@ -0,0 +1,14 @@
+// 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.
+
+package unix
+
+import "syscall"
+
+const unlinkatTrap uintptr = syscall.SYS_UNLINKAT
+const openatTrap uintptr = syscall.SYS_OPENAT
+const fstatatTrap uintptr = syscall.SYS_FSTATAT
+
+const AT_REMOVEDIR = 0x2
+const AT_SYMLINK_NOFOLLOW = 0x1
diff --git a/src/internal/syscall/unix/at_sysnum_fstatat64_linux.go b/src/internal/syscall/unix/at_sysnum_fstatat64_linux.go
new file mode 100644
index 0000000..c6ea206
--- /dev/null
+++ b/src/internal/syscall/unix/at_sysnum_fstatat64_linux.go
@@ -0,0 +1,11 @@
+// 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 arm mips mipsle 386
+
+package unix
+
+import "syscall"
+
+const fstatatTrap uintptr = syscall.SYS_FSTATAT64
diff --git a/src/internal/syscall/unix/at_sysnum_fstatat_linux.go b/src/internal/syscall/unix/at_sysnum_fstatat_linux.go
new file mode 100644
index 0000000..31fe6a5
--- /dev/null
+++ b/src/internal/syscall/unix/at_sysnum_fstatat_linux.go
@@ -0,0 +1,11 @@
+// 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 arm64 riscv64
+
+package unix
+
+import "syscall"
+
+const fstatatTrap uintptr = syscall.SYS_FSTATAT
diff --git a/src/internal/syscall/unix/at_sysnum_linux.go b/src/internal/syscall/unix/at_sysnum_linux.go
new file mode 100644
index 0000000..fa7cd75
--- /dev/null
+++ b/src/internal/syscall/unix/at_sysnum_linux.go
@@ -0,0 +1,13 @@
+// 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.
+
+package unix
+
+import "syscall"
+
+const unlinkatTrap uintptr = syscall.SYS_UNLINKAT
+const openatTrap uintptr = syscall.SYS_OPENAT
+
+const AT_REMOVEDIR = 0x200
+const AT_SYMLINK_NOFOLLOW = 0x100
diff --git a/src/internal/syscall/unix/at_sysnum_netbsd.go b/src/internal/syscall/unix/at_sysnum_netbsd.go
new file mode 100644
index 0000000..fe45e29
--- /dev/null
+++ b/src/internal/syscall/unix/at_sysnum_netbsd.go
@@ -0,0 +1,14 @@
+// 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.
+
+package unix
+
+import "syscall"
+
+const unlinkatTrap uintptr = syscall.SYS_UNLINKAT
+const openatTrap uintptr = syscall.SYS_OPENAT
+const fstatatTrap uintptr = syscall.SYS_FSTATAT
+
+const AT_REMOVEDIR = 0x800
+const AT_SYMLINK_NOFOLLOW = 0x200
diff --git a/src/internal/syscall/unix/at_sysnum_newfstatat_linux.go b/src/internal/syscall/unix/at_sysnum_newfstatat_linux.go
new file mode 100644
index 0000000..e76c1cb
--- /dev/null
+++ b/src/internal/syscall/unix/at_sysnum_newfstatat_linux.go
@@ -0,0 +1,11 @@
+// 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 amd64 mips64 mips64le ppc64 ppc64le s390x
+
+package unix
+
+import "syscall"
+
+const fstatatTrap uintptr = syscall.SYS_NEWFSTATAT
diff --git a/src/internal/syscall/unix/at_sysnum_openbsd.go b/src/internal/syscall/unix/at_sysnum_openbsd.go
new file mode 100644
index 0000000..c2d48b9
--- /dev/null
+++ b/src/internal/syscall/unix/at_sysnum_openbsd.go
@@ -0,0 +1,14 @@
+// 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.
+
+package unix
+
+import "syscall"
+
+const unlinkatTrap uintptr = syscall.SYS_UNLINKAT
+const openatTrap uintptr = syscall.SYS_OPENAT
+const fstatatTrap uintptr = syscall.SYS_FSTATAT
+
+const AT_REMOVEDIR = 0x08
+const AT_SYMLINK_NOFOLLOW = 0x02
diff --git a/src/internal/syscall/unix/copy_file_range_linux.go b/src/internal/syscall/unix/copy_file_range_linux.go
new file mode 100644
index 0000000..cf0a279
--- /dev/null
+++ b/src/internal/syscall/unix/copy_file_range_linux.go
@@ -0,0 +1,26 @@
+// Copyright 2020 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 unix
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) {
+	r1, _, errno := syscall.Syscall6(copyFileRangeTrap,
+		uintptr(rfd),
+		uintptr(unsafe.Pointer(roff)),
+		uintptr(wfd),
+		uintptr(unsafe.Pointer(woff)),
+		uintptr(len),
+		uintptr(flags),
+	)
+	n = int(r1)
+	if errno != 0 {
+		err = errno
+	}
+	return
+}
diff --git a/src/internal/syscall/unix/fcntl_linux_32bit.go b/src/internal/syscall/unix/fcntl_linux_32bit.go
new file mode 100644
index 0000000..6c75afc
--- /dev/null
+++ b/src/internal/syscall/unix/fcntl_linux_32bit.go
@@ -0,0 +1,16 @@
+// Copyright 2019 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.
+
+// On 32-bit Linux systems, use SYS_FCNTL64.
+// If you change the build tags here, see syscall/flock_linux_32bit.go.
+
+// +build linux,386 linux,arm linux,mips linux,mipsle
+
+package unix
+
+import "syscall"
+
+func init() {
+	FcntlSyscall = syscall.SYS_FCNTL64
+}
diff --git a/src/internal/syscall/unix/getentropy_openbsd.go b/src/internal/syscall/unix/getentropy_openbsd.go
new file mode 100644
index 0000000..d5caa80
--- /dev/null
+++ b/src/internal/syscall/unix/getentropy_openbsd.go
@@ -0,0 +1,25 @@
+// Copyright 2016 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 unix
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+// getentropy(2)'s syscall number, from /usr/src/sys/kern/syscalls.master
+const entropyTrap uintptr = 7
+
+// GetEntropy calls the OpenBSD getentropy system call.
+func GetEntropy(p []byte) error {
+	_, _, errno := syscall.Syscall(entropyTrap,
+		uintptr(unsafe.Pointer(&p[0])),
+		uintptr(len(p)),
+		0)
+	if errno != 0 {
+		return errno
+	}
+	return nil
+}
diff --git a/src/internal/syscall/unix/getrandom_freebsd.go b/src/internal/syscall/unix/getrandom_freebsd.go
new file mode 100644
index 0000000..f1ba573
--- /dev/null
+++ b/src/internal/syscall/unix/getrandom_freebsd.go
@@ -0,0 +1,48 @@
+// 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.
+
+package unix
+
+import (
+	"sync/atomic"
+	"syscall"
+	"unsafe"
+)
+
+var randomUnsupported int32 // atomic
+
+// FreeBSD getrandom system call number.
+const randomTrap uintptr = 563
+
+// 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 is only set for portability purpose, no-op on FreeBSD.
+	GRND_RANDOM GetRandomFlag = 0x0002
+)
+
+// GetRandom calls the FreeBSD getrandom system call.
+func GetRandom(p []byte, flags GetRandomFlag) (n int, err error) {
+	if len(p) == 0 {
+		return 0, nil
+	}
+	if atomic.LoadInt32(&randomUnsupported) != 0 {
+		return 0, syscall.ENOSYS
+	}
+	r1, _, errno := syscall.Syscall(randomTrap,
+		uintptr(unsafe.Pointer(&p[0])),
+		uintptr(len(p)),
+		uintptr(flags))
+	if errno != 0 {
+		if errno == syscall.ENOSYS {
+			atomic.StoreInt32(&randomUnsupported, 1)
+		}
+		return 0, errno
+	}
+	return int(r1), nil
+}
diff --git a/src/internal/syscall/unix/getrandom_linux.go b/src/internal/syscall/unix/getrandom_linux.go
new file mode 100644
index 0000000..490d516
--- /dev/null
+++ b/src/internal/syscall/unix/getrandom_linux.go
@@ -0,0 +1,46 @@
+// 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 unix
+
+import (
+	"sync/atomic"
+	"syscall"
+	"unsafe"
+)
+
+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 len(p) == 0 {
+		return 0, nil
+	}
+	if atomic.LoadInt32(&randomUnsupported) != 0 {
+		return 0, syscall.ENOSYS
+	}
+	r1, _, errno := syscall.Syscall(getrandomTrap,
+		uintptr(unsafe.Pointer(&p[0])),
+		uintptr(len(p)),
+		uintptr(flags))
+	if errno != 0 {
+		if errno == syscall.ENOSYS {
+			atomic.StoreInt32(&randomUnsupported, 1)
+		}
+		return 0, errno
+	}
+	return int(r1), nil
+}
diff --git a/src/internal/syscall/unix/ioctl_aix.go b/src/internal/syscall/unix/ioctl_aix.go
new file mode 100644
index 0000000..19d56c3
--- /dev/null
+++ b/src/internal/syscall/unix/ioctl_aix.go
@@ -0,0 +1,25 @@
+// 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.
+
+package unix
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+//go:cgo_import_dynamic libc_ioctl ioctl "libc.a/shr_64.o"
+//go:linkname libc_ioctl libc_ioctl
+var libc_ioctl uintptr
+
+// Implemented in syscall/syscall_aix.go.
+func syscall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno)
+
+func Ioctl(fd int, cmd int, args uintptr) (err error) {
+	_, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_ioctl)), 3, uintptr(fd), uintptr(cmd), uintptr(args), 0, 0, 0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
diff --git a/src/internal/syscall/unix/nonblocking.go b/src/internal/syscall/unix/nonblocking.go
new file mode 100644
index 0000000..db25fcc
--- /dev/null
+++ b/src/internal/syscall/unix/nonblocking.go
@@ -0,0 +1,21 @@
+// 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 dragonfly freebsd linux netbsd openbsd
+
+package unix
+
+import "syscall"
+
+// FcntlSyscall is the number for the fcntl system call. This is
+// usually SYS_FCNTL, but can be overridden to SYS_FCNTL64.
+var FcntlSyscall uintptr = syscall.SYS_FCNTL
+
+func IsNonblock(fd int) (nonblocking bool, err error) {
+	flag, _, e1 := syscall.Syscall(FcntlSyscall, uintptr(fd), uintptr(syscall.F_GETFL), 0)
+	if e1 != 0 {
+		return false, e1
+	}
+	return flag&syscall.O_NONBLOCK != 0, nil
+}
diff --git a/src/internal/syscall/unix/nonblocking_js.go b/src/internal/syscall/unix/nonblocking_js.go
new file mode 100644
index 0000000..a360b53
--- /dev/null
+++ b/src/internal/syscall/unix/nonblocking_js.go
@@ -0,0 +1,11 @@
+// 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 js,wasm
+
+package unix
+
+func IsNonblock(fd int) (nonblocking bool, err error) {
+	return false, nil
+}
diff --git a/src/internal/syscall/unix/nonblocking_libc.go b/src/internal/syscall/unix/nonblocking_libc.go
new file mode 100644
index 0000000..37cc794
--- /dev/null
+++ b/src/internal/syscall/unix/nonblocking_libc.go
@@ -0,0 +1,24 @@
+// 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 aix darwin solaris
+
+package unix
+
+import (
+	"syscall"
+	_ "unsafe" // for go:linkname
+)
+
+func IsNonblock(fd int) (nonblocking bool, err error) {
+	flag, e1 := fcntl(fd, syscall.F_GETFL, 0)
+	if e1 != nil {
+		return false, e1
+	}
+	return flag&syscall.O_NONBLOCK != 0, nil
+}
+
+// Implemented in the syscall package.
+//go:linkname fcntl syscall.fcntl
+func fcntl(fd int, cmd int, arg int) (int, error)
diff --git a/src/internal/syscall/unix/pipe2_illumos.go b/src/internal/syscall/unix/pipe2_illumos.go
new file mode 100644
index 0000000..f3ac8d2
--- /dev/null
+++ b/src/internal/syscall/unix/pipe2_illumos.go
@@ -0,0 +1,34 @@
+// Copyright 2020 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 illumos
+
+package unix
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+//go:cgo_import_dynamic libc_pipe2 pipe2 "libc.so"
+
+//go:linkname procpipe2 libc_pipe2
+
+var procpipe2 uintptr
+
+type _C_int int32
+
+func Pipe2(p []int, flags int) error {
+	if len(p) != 2 {
+		return syscall.EINVAL
+	}
+	var pp [2]_C_int
+	_, _, errno := syscall6(uintptr(unsafe.Pointer(&procpipe2)), 2, uintptr(unsafe.Pointer(&pp)), uintptr(flags), 0, 0, 0, 0)
+	if errno != 0 {
+		return errno
+	}
+	p[0] = int(pp[0])
+	p[1] = int(pp[1])
+	return nil
+}
diff --git a/src/internal/syscall/unix/sysnum_linux_386.go b/src/internal/syscall/unix/sysnum_linux_386.go
new file mode 100644
index 0000000..2bda08c
--- /dev/null
+++ b/src/internal/syscall/unix/sysnum_linux_386.go
@@ -0,0 +1,10 @@
+// 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 unix
+
+const (
+	getrandomTrap     uintptr = 355
+	copyFileRangeTrap uintptr = 377
+)
diff --git a/src/internal/syscall/unix/sysnum_linux_amd64.go b/src/internal/syscall/unix/sysnum_linux_amd64.go
new file mode 100644
index 0000000..ae5239e
--- /dev/null
+++ b/src/internal/syscall/unix/sysnum_linux_amd64.go
@@ -0,0 +1,10 @@
+// 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 unix
+
+const (
+	getrandomTrap     uintptr = 318
+	copyFileRangeTrap uintptr = 326
+)
diff --git a/src/internal/syscall/unix/sysnum_linux_arm.go b/src/internal/syscall/unix/sysnum_linux_arm.go
new file mode 100644
index 0000000..acaec05
--- /dev/null
+++ b/src/internal/syscall/unix/sysnum_linux_arm.go
@@ -0,0 +1,10 @@
+// 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 unix
+
+const (
+	getrandomTrap     uintptr = 384
+	copyFileRangeTrap uintptr = 391
+)
diff --git a/src/internal/syscall/unix/sysnum_linux_generic.go b/src/internal/syscall/unix/sysnum_linux_generic.go
new file mode 100644
index 0000000..f48da40
--- /dev/null
+++ b/src/internal/syscall/unix/sysnum_linux_generic.go
@@ -0,0 +1,17 @@
+// 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.
+
+// +build linux
+// +build arm64 riscv64
+
+package unix
+
+// This file is named "generic" because at a certain point Linux started
+// standardizing on system call numbers across architectures. So far this
+// means only arm64 and riscv64 use the standard numbers.
+
+const (
+	getrandomTrap     uintptr = 278
+	copyFileRangeTrap uintptr = 285
+)
diff --git a/src/internal/syscall/unix/sysnum_linux_mips64x.go b/src/internal/syscall/unix/sysnum_linux_mips64x.go
new file mode 100644
index 0000000..6680942
--- /dev/null
+++ b/src/internal/syscall/unix/sysnum_linux_mips64x.go
@@ -0,0 +1,12 @@
+// Copyright 2015 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 mips64 mips64le
+
+package unix
+
+const (
+	getrandomTrap     uintptr = 5313
+	copyFileRangeTrap uintptr = 5320
+)
diff --git a/src/internal/syscall/unix/sysnum_linux_mipsx.go b/src/internal/syscall/unix/sysnum_linux_mipsx.go
new file mode 100644
index 0000000..185d832
--- /dev/null
+++ b/src/internal/syscall/unix/sysnum_linux_mipsx.go
@@ -0,0 +1,12 @@
+// Copyright 2016 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 mips mipsle
+
+package unix
+
+const (
+	getrandomTrap     uintptr = 4353
+	copyFileRangeTrap uintptr = 4360
+)
diff --git a/src/internal/syscall/unix/sysnum_linux_ppc64x.go b/src/internal/syscall/unix/sysnum_linux_ppc64x.go
new file mode 100644
index 0000000..576937e
--- /dev/null
+++ b/src/internal/syscall/unix/sysnum_linux_ppc64x.go
@@ -0,0 +1,12 @@
+// 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.
+
+// +build ppc64 ppc64le
+
+package unix
+
+const (
+	getrandomTrap     uintptr = 359
+	copyFileRangeTrap uintptr = 379
+)
diff --git a/src/internal/syscall/unix/sysnum_linux_s390x.go b/src/internal/syscall/unix/sysnum_linux_s390x.go
new file mode 100644
index 0000000..bf2c01e
--- /dev/null
+++ b/src/internal/syscall/unix/sysnum_linux_s390x.go
@@ -0,0 +1,10 @@
+// Copyright 2016 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 unix
+
+const (
+	getrandomTrap     uintptr = 349
+	copyFileRangeTrap uintptr = 375
+)
diff --git a/src/internal/syscall/unix/writev_illumos.go b/src/internal/syscall/unix/writev_illumos.go
new file mode 100644
index 0000000..eb7973d
--- /dev/null
+++ b/src/internal/syscall/unix/writev_illumos.go
@@ -0,0 +1,30 @@
+// Copyright 2020 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 illumos
+
+package unix
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+//go:cgo_import_dynamic libc_writev writev "libc.so"
+
+//go:linkname procwritev libc_writev
+
+var procwritev uintptr
+
+func Writev(fd int, iovs []syscall.Iovec) (uintptr, error) {
+	var p *syscall.Iovec
+	if len(iovs) > 0 {
+		p = &iovs[0]
+	}
+	n, _, errno := syscall6(uintptr(unsafe.Pointer(&procwritev)), 3, uintptr(fd), uintptr(unsafe.Pointer(p)), uintptr(len(iovs)), 0, 0, 0)
+	if errno != 0 {
+		return 0, errno
+	}
+	return n, nil
+}