Initial commit

1 files changed, 94 insertions, 0 deletions

diff --git a/pkg/proc/utils.go b/pkg/proc/utils.go
new file mode 100644
index 000000000..e770a6810
--- /dev/null
+++ b/pkg/proc/utils.go
@@ -0,0 +1,94 @@
+/*
+Copyright The containerd Authors.
+Copyright 2018 Google LLC
+
+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
+
+    https://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 proc
+
+import (
+	"encoding/json"
+	"io"
+	"os"
+	"strings"
+	"time"
+
+	runsc "github.com/google/gvisor-containerd-shim/pkg/go-runsc"
+)
+
+const (
+	internalErrorCode = 128
+	bufferSize        = 32
+)
+
+// ExitCh is the exit events channel for containers and exec processes
+// inside the sandbox.
+var ExitCh = make(chan Exit, bufferSize)
+
+// TODO(random-liu): This can be a utility.
+
+// TODO(mlaventure): move to runc package?
+func getLastRuntimeError(r *runsc.Runsc) (string, error) {
+	if r.Log == "" {
+		return "", nil
+	}
+
+	f, err := os.OpenFile(r.Log, os.O_RDONLY, 0400)
+	if err != nil {
+		return "", err
+	}
+
+	var (
+		errMsg string
+		log    struct {
+			Level string
+			Msg   string
+			Time  time.Time
+		}
+	)
+
+	dec := json.NewDecoder(f)
+	for err = nil; err == nil; {
+		if err = dec.Decode(&log); err != nil && err != io.EOF {
+			return "", err
+		}
+		if log.Level == "error" {
+			errMsg = strings.TrimSpace(log.Msg)
+		}
+	}
+
+	return errMsg, nil
+}
+
+func copyFile(to, from string) error {
+	ff, err := os.Open(from)
+	if err != nil {
+		return err
+	}
+	defer ff.Close()
+	tt, err := os.Create(to)
+	if err != nil {
+		return err
+	}
+	defer tt.Close()
+
+	p := bufPool.Get().(*[]byte)
+	defer bufPool.Put(p)
+	_, err = io.CopyBuffer(tt, ff, *p)
+	return err
+}
+
+func hasNoIO(r *CreateConfig) bool {
+	return r.Stdin == "" && r.Stdout == "" && r.Stderr == ""
+}