replace docker/pkg/signal with github.com/moby/sys/signal

The github.com/docker/docker/pkg/signal package was moved to a separate
module in moby/sys.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/github.com/docker/docker/pkg/signal/README.md

@@ -1 +0,0 @@
-This package provides helper functions for dealing with signals across various operating systems

vendor/github.com/docker/docker/pkg/signal/trap.go

@@ -1,104 +0,0 @@
-package signal // import "github.com/docker/docker/pkg/signal"
-
-import (
-	"fmt"
-	"os"
-	gosignal "os/signal"
-	"path/filepath"
-	"runtime"
-	"strings"
-	"sync/atomic"
-	"syscall"
-	"time"
-
-	"github.com/pkg/errors"
-)
-
-// Trap sets up a simplified signal "trap", appropriate for common
-// behavior expected from a vanilla unix command-line tool in general
-// (and the Docker engine in particular).
-//
-// * If SIGINT or SIGTERM are received, `cleanup` is called, then the process is terminated.
-// * If SIGINT or SIGTERM are received 3 times before cleanup is complete, then cleanup is
-//   skipped and the process is terminated immediately (allows force quit of stuck daemon)
-// * A SIGQUIT always causes an exit without cleanup, with a goroutine dump preceding exit.
-// * Ignore SIGPIPE events. These are generated by systemd when journald is restarted while
-//   the docker daemon is not restarted and also running under systemd.
-//   Fixes https://github.com/docker/docker/issues/19728
-//
-func Trap(cleanup func(), logger interface {
-	Info(args ...interface{})
-}) {
-	c := make(chan os.Signal, 1)
-	// we will handle INT, TERM, QUIT, SIGPIPE here
-	signals := []os.Signal{os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT, syscall.SIGPIPE}
-	gosignal.Notify(c, signals...)
-	go func() {
-		interruptCount := uint32(0)
-		for sig := range c {
-			if sig == syscall.SIGPIPE {
-				continue
-			}
-
-			go func(sig os.Signal) {
-				logger.Info(fmt.Sprintf("Processing signal '%v'", sig))
-				switch sig {
-				case os.Interrupt, syscall.SIGTERM:
-					if atomic.LoadUint32(&interruptCount) < 3 {
-						// Initiate the cleanup only once
-						if atomic.AddUint32(&interruptCount, 1) == 1 {
-							// Call the provided cleanup handler
-							cleanup()
-							os.Exit(0)
-						} else {
-							return
-						}
-					} else {
-						// 3 SIGTERM/INT signals received; force exit without cleanup
-						logger.Info("Forcing docker daemon shutdown without cleanup; 3 interrupts received")
-					}
-				case syscall.SIGQUIT:
-					DumpStacks("")
-					logger.Info("Forcing docker daemon shutdown without cleanup on SIGQUIT")
-				}
-				// for the SIGINT/TERM, and SIGQUIT non-clean shutdown case, exit with 128 + signal #
-				os.Exit(128 + int(sig.(syscall.Signal)))
-			}(sig)
-		}
-	}()
-}
-
-const stacksLogNameTemplate = "goroutine-stacks-%s.log"
-
-// DumpStacks appends the runtime stack into file in dir and returns full path
-// to that file.
-func DumpStacks(dir string) (string, error) {
-	var (
-		buf       []byte
-		stackSize int
-	)
-	bufferLen := 16384
-	for stackSize == len(buf) {
-		buf = make([]byte, bufferLen)
-		stackSize = runtime.Stack(buf, true)
-		bufferLen *= 2
-	}
-	buf = buf[:stackSize]
-	var f *os.File
-	if dir != "" {
-		path := filepath.Join(dir, fmt.Sprintf(stacksLogNameTemplate, strings.Replace(time.Now().Format(time.RFC3339), ":", "", -1)))
-		var err error
-		f, err = os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0666)
-		if err != nil {
-			return "", errors.Wrap(err, "failed to open file to write the goroutine stacks")
-		}
-		defer f.Close()
-		defer f.Sync()
-	} else {
-		f = os.Stderr
-	}
-	if _, err := f.Write(buf); err != nil {
-		return "", errors.Wrap(err, "failed to write goroutine stacks")
-	}
-	return f.Name(), nil
-}

vendor/github.com/moby/sys/mount/go.mod

@@ -3,6 +3,6 @@ module github.com/moby/sys/mount
 go 1.14
 
 require (
-	github.com/moby/sys/mountinfo v0.4.0
+	github.com/moby/sys/mountinfo v0.4.1
 	golang.org/x/sys v0.0.0-20200922070232-aee5d888a860
 )

vendor/github.com/moby/sys/signal/go.mod

@@ -0,0 +1,5 @@
+module github.com/moby/sys/signal
+
+go 1.13
+
+require golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c

vendor/github.com/moby/sys/signal/signal.go

@@ -1,6 +1,6 @@
 // Package signal provides helper functions for dealing with signals across
 // various operating systems.
-package signal // import "github.com/docker/docker/pkg/signal"
+package signal
 
 import (
 	"fmt"

vendor/github.com/moby/sys/signal/signal_darwin.go

@@ -1,4 +1,4 @@
-package signal // import "github.com/docker/docker/pkg/signal"
+package signal
 
 import (
 	"syscall"

vendor/github.com/moby/sys/signal/signal_freebsd.go

@@ -1,4 +1,4 @@
-package signal // import "github.com/docker/docker/pkg/signal"
+package signal
 
 import (
 	"syscall"

vendor/github.com/moby/sys/signal/signal_linux.go

@@ -1,6 +1,6 @@
 // +build !mips,!mipsle,!mips64,!mips64le
 
-package signal // import "github.com/docker/docker/pkg/signal"
+package signal
 
 import (
 	"syscall"

vendor/github.com/moby/sys/signal/signal_linux_mipsx.go

@@ -1,7 +1,7 @@
 // +build linux
 // +build mips mipsle mips64 mips64le
 
-package signal // import "github.com/docker/docker/pkg/signal"
+package signal
 
 import (
 	"syscall"

vendor/github.com/moby/sys/signal/signal_unix.go

@@ -1,6 +1,6 @@
 // +build !windows
 
-package signal // import "github.com/docker/docker/pkg/signal"
+package signal
 
 import (
 	"syscall"

vendor/github.com/moby/sys/signal/signal_unsupported.go

@@ -1,6 +1,6 @@
 // +build !linux,!darwin,!freebsd,!windows
 
-package signal // import "github.com/docker/docker/pkg/signal"
+package signal
 
 import (
 	"syscall"

vendor/github.com/moby/sys/signal/signal_windows.go

@@ -1,4 +1,4 @@
-package signal // import "github.com/docker/docker/pkg/signal"
+package signal
 
 import (
 	"syscall"