Bump deps

```
* use go 1.17 semantics in go.mod
* pin tonistiigi/fsutil dep to match docker/docker's dep
go get -u ./...
go mod vendor
```

vendor/github.com/containerd/fifo/.gitattributes

@@ -0,0 +1 @@
+*.go text eol=lf

vendor/github.com/containerd/fifo/errors.go

@@ -16,9 +16,7 @@
 
 package fifo
 
-import (
-	"errors"
-)
+import "errors"
 
 var (
 	ErrClosed      = errors.New("fifo closed")

vendor/github.com/containerd/fifo/fifo.go

@@ -1,3 +1,5 @@
+// +build !windows
+
 /*
    Copyright The containerd Authors.
 
@@ -25,6 +27,7 @@ import (
 	"syscall"
 
 	"github.com/pkg/errors"
+	"golang.org/x/sys/unix"
 )
 
 type fifo struct {
@@ -41,6 +44,21 @@ type fifo struct {
 
 var leakCheckWg *sync.WaitGroup
 
+// OpenFifoDup2 is same as OpenFifo, but additionally creates a copy of the FIFO file descriptor with dup2 syscall.
+func OpenFifoDup2(ctx context.Context, fn string, flag int, perm os.FileMode, fd int) (io.ReadWriteCloser, error) {
+	f, err := openFifo(ctx, fn, flag, perm)
+	if err != nil {
+		return nil, errors.Wrap(err, "fifo error")
+	}
+
+	if err := unix.Dup2(int(f.file.Fd()), fd); err != nil {
+		_ = f.Close()
+		return nil, errors.Wrap(err, "dup2 error")
+	}
+
+	return f, nil
+}
+
 // OpenFifo opens a fifo. Returns io.ReadWriteCloser.
 // Context can be used to cancel this function until open(2) has not returned.
 // Accepted flags:
@@ -52,9 +70,13 @@ var leakCheckWg *sync.WaitGroup
 //     fifo isn't open. read/write will be connected after the actual fifo is
 //     open or after fifo is closed.
 func OpenFifo(ctx context.Context, fn string, flag int, perm os.FileMode) (io.ReadWriteCloser, error) {
+	return openFifo(ctx, fn, flag, perm)
+}
+
+func openFifo(ctx context.Context, fn string, flag int, perm os.FileMode) (*fifo, error) {
 	if _, err := os.Stat(fn); err != nil {
 		if os.IsNotExist(err) && flag&syscall.O_CREAT != 0 {
-			if err := mkfifo(fn, uint32(perm&os.ModePerm)); err != nil && !os.IsExist(err) {
+			if err := syscall.Mkfifo(fn, uint32(perm&os.ModePerm)); err != nil && !os.IsExist(err) {
 				return nil, errors.Wrapf(err, "error creating fifo %v", fn)
 			}
 		} else {

vendor/github.com/containerd/fifo/go.mod

@@ -1,9 +0,0 @@
-module github.com/containerd/fifo
-
-go 1.13
-
-require (
-	github.com/pkg/errors v0.8.1
-	github.com/stretchr/testify v1.4.0
-	golang.org/x/sys v0.0.0-20191210023423-ac6580df4449
-)

vendor/github.com/containerd/fifo/go.sum

@@ -1,15 +0,0 @@
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
-github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
-github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-golang.org/x/sys v0.0.0-20191210023423-ac6580df4449 h1:gSbV7h1NRL2G1xTg/owz62CST1oJBmxy4QpMMregXVQ=
-golang.org/x/sys v0.0.0-20191210023423-ac6580df4449/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
-gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

vendor/github.com/containerd/fifo/handle_nolinux.go

@@ -1,4 +1,4 @@
-// +build !linux
+// +build !linux,!windows
 
 /*
    Copyright The containerd Authors.
@@ -38,8 +38,8 @@ func getHandle(fn string) (*handle, error) {
 
 	h := &handle{
 		fn:  fn,
-		dev: uint64(stat.Dev),
-		ino: uint64(stat.Ino),
+		dev: uint64(stat.Dev), //nolint: unconvert
+		ino: uint64(stat.Ino), //nolint: unconvert
 	}
 
 	return h, nil
@@ -50,7 +50,7 @@ func (h *handle) Path() (string, error) {
 	if err := syscall.Stat(h.fn, &stat); err != nil {
 		return "", errors.Wrapf(err, "path %v could not be statted", h.fn)
 	}
-	if uint64(stat.Dev) != h.dev || uint64(stat.Ino) != h.ino {
+	if uint64(stat.Dev) != h.dev || uint64(stat.Ino) != h.ino { //nolint: unconvert
 		return "", errors.Errorf("failed to verify handle %v/%v %v/%v for %v", stat.Dev, h.dev, stat.Ino, h.ino, h.fn)
 	}
 	return h.fn, nil

vendor/github.com/containerd/fifo/mkfifo_solaris.go

@@ -1,27 +0,0 @@
-// +build solaris
-
-/*
-   Copyright The containerd Authors.
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-*/
-
-package fifo
-
-import (
-	"golang.org/x/sys/unix"
-)
-
-func mkfifo(path string, mode uint32) (err error) {
-	return unix.Mkfifo(path, mode)
-}

vendor/github.com/containerd/fifo/raw.go

@@ -1,4 +1,4 @@
-// +build go1.12
+// +build !windows
 
 /*
    Copyright The containerd Authors.

vendor/github.com/containerd/fifo/readme.md

@@ -1,7 +1,9 @@
 ### fifo
 
-[![Build Status](https://travis-ci.org/containerd/fifo.svg?branch=master)](https://travis-ci.org/containerd/fifo)
+[![PkgGoDev](https://pkg.go.dev/badge/github.com/containerd/fifo)](https://pkg.go.dev/github.com/containerd/fifo)
+[![Build Status](https://github.com/containerd/fifo/workflows/CI/badge.svg)](https://github.com/containerd/fifo/actions?query=workflow%3ACI)
 [![codecov](https://codecov.io/gh/containerd/fifo/branch/master/graph/badge.svg)](https://codecov.io/gh/containerd/fifo)
+[![Go Report Card](https://goreportcard.com/badge/github.com/containerd/fifo)](https://goreportcard.com/report/github.com/containerd/fifo)
 
 Go package for handling fifos in a sane way.
 

vendor/github.com/containerd/fifo/utils.go

@@ -1,5 +1,3 @@
-// +build !solaris
-
 /*
    Copyright The containerd Authors.
 
@@ -18,8 +16,20 @@
 
 package fifo
 
-import "syscall"
+import "os"
 
-func mkfifo(path string, mode uint32) (err error) {
-	return syscall.Mkfifo(path, mode)
+// IsFifo checks if a file is a (named pipe) fifo
+// if the file does not exist then it returns false
+func IsFifo(path string) (bool, error) {
+	stat, err := os.Stat(path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return false, nil
+		}
+		return false, err
+	}
+	if stat.Mode()&os.ModeNamedPipe == os.ModeNamedPipe {
+		return true, nil
+	}
+	return false, nil
 }