dep ensure

3 files changed, 456 insertions, 0 deletions

diff --git a/vendor/github.com/euank/go-kmsg-parser/LICENSE b/vendor/github.com/euank/go-kmsg-parser/LICENSE
new file mode 100644
index 000000000..8dada3eda
--- /dev/null
+++ b/vendor/github.com/euank/go-kmsg-parser/LICENSE
@@ -0,0 +1,201 @@
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diff --git a/vendor/github.com/euank/go-kmsg-parser/kmsgparser/kmsgparser.go b/vendor/github.com/euank/go-kmsg-parser/kmsgparser/kmsgparser.go
new file mode 100644
index 000000000..df160cad5
--- /dev/null
+++ b/vendor/github.com/euank/go-kmsg-parser/kmsgparser/kmsgparser.go
@@ -0,0 +1,200 @@
+/*
+Copyright 2016 Euan Kemp
+
+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 kmsgparser implements a parser for the Linux `/dev/kmsg` format.
+// More information about this format may be found here:
+// https://www.kernel.org/doc/Documentation/ABI/testing/dev-kmsg
+// Some parts of it are slightly inspired by rsyslog's contrib module:
+// https://github.com/rsyslog/rsyslog/blob/v8.22.0/contrib/imkmsg/kmsg.c
+package kmsgparser
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strconv"
+	"strings"
+	"syscall"
+	"time"
+)
+
+// Parser is a parser for the kernel ring buffer found at /dev/kmsg
+type Parser interface {
+	// SeekEnd moves the parser to the end of the kmsg queue.
+	SeekEnd() error
+	// Parse provides a channel of messages read from the kernel ring buffer.
+	// When first called, it will read the existing ringbuffer, after which it will emit new messages as they occur.
+	Parse() <-chan Message
+	// SetLogger sets the logger that will be used to report malformed kernel
+	// ringbuffer lines or unexpected kmsg read errors.
+	SetLogger(Logger)
+	// Close closes the underlying kmsg reader for this parser
+	Close() error
+}
+
+// Message represents a given kmsg logline, including its timestamp (as
+// calculated based on offset from boot time), its possibly multi-line body,
+// and so on. More information about these mssages may be found here:
+// https://www.kernel.org/doc/Documentation/ABI/testing/dev-kmsg
+type Message struct {
+	Priority       int
+	SequenceNumber int
+	Timestamp      time.Time
+	Message        string
+}
+
+func NewParser() (Parser, error) {
+	f, err := os.Open("/dev/kmsg")
+	if err != nil {
+		return nil, err
+	}
+
+	bootTime, err := getBootTime()
+	if err != nil {
+		return nil, err
+	}
+
+	return &parser{
+		log:        &StandardLogger{nil},
+		kmsgReader: f,
+		bootTime:   bootTime,
+	}, nil
+}
+
+type ReadSeekCloser interface {
+	io.ReadCloser
+	io.Seeker
+}
+
+type parser struct {
+	log        Logger
+	kmsgReader ReadSeekCloser
+	bootTime   time.Time
+}
+
+func getBootTime() (time.Time, error) {
+	var sysinfo syscall.Sysinfo_t
+	err := syscall.Sysinfo(&sysinfo)
+	if err != nil {
+		return time.Time{}, fmt.Errorf("could not get boot time: %v", err)
+	}
+	// sysinfo only has seconds
+	return time.Now().Add(-1 * (time.Duration(sysinfo.Uptime) * time.Second)), nil
+}
+
+func (p *parser) SetLogger(log Logger) {
+	p.log = log
+}
+
+func (p *parser) Close() error {
+	return p.kmsgReader.Close()
+}
+
+func (p *parser) SeekEnd() error {
+	_, err := p.kmsgReader.Seek(0, os.SEEK_END)
+	return err
+}
+
+// Parse will read from the provided reader and provide a channel of messages
+// parsed.
+// If the provided reader *is not* a proper Linux kmsg device, Parse might not
+// behave correctly since it relies on specific behavior of `/dev/kmsg`
+//
+// A goroutine is created to process the provided reader. The goroutine will
+// exit when the given reader is closed.
+// Closing the passed in reader will cause the goroutine to exit.
+func (p *parser) Parse() <-chan Message {
+
+	output := make(chan Message, 1)
+
+	go func() {
+		defer close(output)
+		msg := make([]byte, 8192)
+		for {
+			// Each read call gives us one full message.
+			// https://www.kernel.org/doc/Documentation/ABI/testing/dev-kmsg
+			n, err := p.kmsgReader.Read(msg)
+			if err != nil {
+				if err == syscall.EPIPE {
+					p.log.Warningf("short read from kmsg; skipping")
+					continue
+				}
+
+				if err == io.EOF {
+					p.log.Infof("kmsg reader closed, shutting down")
+					return
+				}
+
+				p.log.Errorf("error reading /dev/kmsg: %v", err)
+				return
+			}
+
+			msgStr := string(msg[:n])
+
+			message, err := p.parseMessage(msgStr)
+			if err != nil {
+				p.log.Warningf("unable to parse kmsg message %q: %v", msgStr, err)
+				continue
+			}
+
+			output <- message
+		}
+	}()
+
+	return output
+}
+
+func (p *parser) parseMessage(input string) (Message, error) {
+	// Format:
+	//   PRIORITY,SEQUENCE_NUM,TIMESTAMP,-;MESSAGE
+	parts := strings.SplitN(input, ";", 2)
+	if len(parts) != 2 {
+		return Message{}, fmt.Errorf("invalid kmsg; must contain a ';'")
+	}
+
+	metadata, message := parts[0], parts[1]
+
+	metadataParts := strings.Split(metadata, ",")
+	if len(metadataParts) < 3 {
+		return Message{}, fmt.Errorf("invalid kmsg: must contain at least 3 ',' separated pieces at the start")
+	}
+
+	priority, sequence, timestamp := metadataParts[0], metadataParts[1], metadataParts[2]
+
+	prioNum, err := strconv.Atoi(priority)
+	if err != nil {
+		return Message{}, fmt.Errorf("could not parse %q as priority: %v", priority, err)
+	}
+
+	sequenceNum, err := strconv.Atoi(sequence)
+	if err != nil {
+		return Message{}, fmt.Errorf("could not parse %q as sequence number: %v", priority, err)
+	}
+
+	timestampUsFromBoot, err := strconv.ParseInt(timestamp, 10, 64)
+	if err != nil {
+		return Message{}, fmt.Errorf("could not parse %q as timestamp: %v", priority, err)
+	}
+	// timestamp is offset in microsecond from boottime.
+	msgTime := p.bootTime.Add(time.Duration(timestampUsFromBoot) * time.Microsecond)
+
+	return Message{
+		Priority:       prioNum,
+		SequenceNumber: sequenceNum,
+		Timestamp:      msgTime,
+		Message:        message,
+	}, nil
+}
diff --git a/vendor/github.com/euank/go-kmsg-parser/kmsgparser/log.go b/vendor/github.com/euank/go-kmsg-parser/kmsgparser/log.go
new file mode 100644
index 000000000..6ea2d96df
--- /dev/null
+++ b/vendor/github.com/euank/go-kmsg-parser/kmsgparser/log.go
@@ -0,0 +1,55 @@
+/*
+Copyright 2016 Euan Kemp
+
+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 kmsgparser
+
+import stdlog "log"
+
+// Logger is a glog compatible logging interface
+// The StandardLogger struct can be used to wrap a log.Logger from the golang
+// "log" package to create a standard a logger fulfilling this interface as
+// well.
+type Logger interface {
+	Warningf(string, ...interface{})
+	Infof(string, ...interface{})
+	Errorf(string, ...interface{})
+}
+
+// StandardLogger adapts the "log" package's Logger interface to be a Logger
+type StandardLogger struct {
+	*stdlog.Logger
+}
+
+func (s *StandardLogger) Warningf(fmt string, args ...interface{}) {
+	if s.Logger == nil {
+		return
+	}
+	s.Logger.Printf("[WARNING] "+fmt, args)
+}
+
+func (s *StandardLogger) Infof(fmt string, args ...interface{}) {
+	if s.Logger == nil {
+		return
+	}
+	s.Logger.Printf("[INFO] "+fmt, args)
+}
+
+func (s *StandardLogger) Errorf(fmt string, args ...interface{}) {
+	if s.Logger == nil {
+		return
+	}
+	s.Logger.Printf("[INFO] "+fmt, args)
+}