vendor: add qingstor-sdk-go for QingStor

vendor/github.com/pengsrc/go-shared/pid/pidfile.go

@@ -0,0 +1,49 @@
+// Package pid provides structure and helper functions to create and remove
+// PID file. A PID file is usually a file used to store the process ID of a
+// running process.
+package pid
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// File is a file used to store the process ID of a running process.
+type File struct {
+	path string
+}
+
+func checkPIDFileAlreadyExists(path string) error {
+	if pidByte, err := ioutil.ReadFile(path); err == nil {
+		pidString := strings.TrimSpace(string(pidByte))
+		if pid, err := strconv.Atoi(pidString); err == nil {
+			if processExists(pid) {
+				return fmt.Errorf("pid file found, ensure server is not running or delete %s", path)
+			}
+		}
+	}
+	return nil
+}
+
+// New creates a PID file using the specified path.
+func New(path string) (*File, error) {
+	if err := checkPIDFileAlreadyExists(path); err != nil {
+		return nil, err
+	}
+	if err := ioutil.WriteFile(path, []byte(fmt.Sprintf("%d", os.Getpid())), 0644); err != nil {
+		return nil, err
+	}
+
+	return &File{path: path}, nil
+}
+
+// Remove removes the File.
+func (file File) Remove() error {
+	if err := os.Remove(file.path); err != nil {
+		return err
+	}
+	return nil
+}

vendor/github.com/pengsrc/go-shared/pid/pidfile_darwin.go

@@ -0,0 +1,14 @@
+// +build darwin
+
+package pid
+
+import (
+	"syscall"
+)
+
+func processExists(pid int) bool {
+	// OS X does not have a proc filesystem.
+	// Use kill -0 pid to judge if the process exists.
+	err := syscall.Kill(pid, 0)
+	return err == nil
+}

vendor/github.com/pengsrc/go-shared/pid/pidfile_test.go

@@ -0,0 +1,38 @@
+package pid
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestNewAndRemove(t *testing.T) {
+	dir, err := ioutil.TempDir(os.TempDir(), "test-pidfile")
+	if err != nil {
+		t.Fatal("Could not create test directory")
+	}
+
+	path := filepath.Join(dir, "testfile")
+	file, err := New(path)
+	if err != nil {
+		t.Fatal("Could not create test file", err)
+	}
+
+	_, err = New(path)
+	if err == nil {
+		t.Fatal("Test file creation not blocked")
+	}
+
+	if err := file.Remove(); err != nil {
+		t.Fatal("Could not delete created test file")
+	}
+}
+
+func TestRemoveInvalidPath(t *testing.T) {
+	file := File{path: filepath.Join("foo", "bar")}
+
+	if err := file.Remove(); err == nil {
+		t.Fatal("Non-existing file doesn't give an error on delete")
+	}
+}

vendor/github.com/pengsrc/go-shared/pid/pidfile_unix.go

@@ -0,0 +1,16 @@
+// +build !windows,!darwin
+
+package pid
+
+import (
+	"os"
+	"path/filepath"
+	"strconv"
+)
+
+func processExists(pid int) bool {
+	if _, err := os.Stat(filepath.Join("/proc", strconv.Itoa(pid))); err == nil {
+		return true
+	}
+	return false
+}

vendor/github.com/pengsrc/go-shared/pid/pidfile_windows.go

@@ -0,0 +1,23 @@
+package pid
+
+import "syscall"
+
+const (
+	processQueryLimitedInformation = 0x1000
+
+	stillActive = 259
+)
+
+func processExists(pid int) bool {
+	h, err := syscall.OpenProcess(processQueryLimitedInformation, false, uint32(pid))
+	if err != nil {
+		return false
+	}
+	var c uint32
+	err = syscall.GetExitCodeProcess(h, &c)
+	syscall.Close(h)
+	if err != nil {
+		return c == stillActive
+	}
+	return true
+}