1 files changed, 107 insertions, 0 deletions
diff --git a/vendor/github.com/containerd/go-runc/utils.go b/vendor/github.com/containerd/go-runc/utils.go
new file mode 100644
index 000000000..69ad6ead7
--- /dev/null
+++ b/vendor/github.com/containerd/go-runc/utils.go
@@ -0,0 +1,107 @@
+/*
+   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 runc
+
+import (
+	"bytes"
+	"io/ioutil"
+	"strconv"
+	"strings"
+	"sync"
+	"syscall"
+)
+
+// ReadPidFile reads the pid file at the provided path and returns
+// the pid or an error if the read and conversion is unsuccessful
+func ReadPidFile(path string) (int, error) {
+	data, err := ioutil.ReadFile(path)
+	if err != nil {
+		return -1, err
+	}
+	return strconv.Atoi(string(data))
+}
+
+const exitSignalOffset = 128
+
+// exitStatus returns the correct exit status for a process based on if it
+// was signaled or exited cleanly
+func exitStatus(status syscall.WaitStatus) int {
+	if status.Signaled() {
+		return exitSignalOffset + int(status.Signal())
+	}
+	return status.ExitStatus()
+}
+
+var bytesBufferPool = sync.Pool{
+	New: func() interface{} {
+		return bytes.NewBuffer(nil)
+	},
+}
+
+func getBuf() *bytes.Buffer {
+	return bytesBufferPool.Get().(*bytes.Buffer)
+}
+
+func putBuf(b *bytes.Buffer) {
+	b.Reset()
+	bytesBufferPool.Put(b)
+}
+
+// fieldsASCII is similar to strings.Fields but only allows ASCII whitespaces
+func fieldsASCII(s string) []string {
+	fn := func(r rune) bool {
+		switch r {
+		case '\t', '\n', '\f', '\r', ' ':
+			return true
+		}
+		return false
+	}
+	return strings.FieldsFunc(s, fn)
+}
+
+// ParsePSOutput parses the runtime's ps raw output and returns a TopResults
+func ParsePSOutput(output []byte) (*TopResults, error) {
+	topResults := &TopResults{}
+
+	lines := strings.Split(string(output), "\n")
+	topResults.Headers = fieldsASCII(lines[0])
+
+	pidIndex := -1
+	for i, name := range topResults.Headers {
+		if name == "PID" {
+			pidIndex = i
+		}
+	}
+
+	for _, line := range lines[1:] {
+		if len(line) == 0 {
+			continue
+		}
+
+		fields := fieldsASCII(line)
+
+		if fields[pidIndex] == "-" {
+			continue
+		}
+
+		process := fields[:len(topResults.Headers)-1]
+		process = append(process, strings.Join(fields[len(topResults.Headers)-1:], " "))
+		topResults.Processes = append(topResults.Processes, process)
+
+	}
+	return topResults, nil
+}