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vendor/github.com/coreos/go-systemd/v22
191
vendor/github.com/coreos/go-systemd/v22/LICENSE
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191
vendor/github.com/coreos/go-systemd/v22/LICENSE
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@ -0,0 +1,191 @@
|
|||
Apache License
|
||||
Version 2.0, January 2004
|
||||
http://www.apache.org/licenses/
|
||||
|
||||
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
|
||||
|
||||
1. Definitions.
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||||
|
||||
"License" shall mean the terms and conditions for use, reproduction, and
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You must retain, in the Source form of any Derivative Works that You distribute,
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|
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|
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|
||||
|
||||
5. Submission of Contributions.
|
||||
|
||||
Unless You explicitly state otherwise, any Contribution intentionally submitted
|
||||
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|
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|
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|
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|
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This License does not grant permission to use the trade names, trademarks,
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|
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|
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|
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END OF TERMS AND CONDITIONS
|
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|
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APPENDIX: How to apply the Apache License to your work
|
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|
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To apply the Apache License to your work, attach the following boilerplate
|
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|
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|
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Copyright [yyyy] [name of copyright owner]
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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||||
http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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||||
distributed under the License is distributed on an "AS IS" BASIS,
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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.
|
5
vendor/github.com/coreos/go-systemd/v22/NOTICE
generated
vendored
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5
vendor/github.com/coreos/go-systemd/v22/NOTICE
generated
vendored
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|
@ -0,0 +1,5 @@
|
|||
CoreOS Project
|
||||
Copyright 2018 CoreOS, Inc
|
||||
|
||||
This product includes software developed at CoreOS, Inc.
|
||||
(http://www.coreos.com/).
|
82
vendor/github.com/coreos/go-systemd/v22/internal/dlopen/dlopen.go
generated
vendored
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82
vendor/github.com/coreos/go-systemd/v22/internal/dlopen/dlopen.go
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vendored
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@ -0,0 +1,82 @@
|
|||
// Copyright 2016 CoreOS, Inc.
|
||||
//
|
||||
// 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 dlopen provides some convenience functions to dlopen a library and
|
||||
// get its symbols.
|
||||
package dlopen
|
||||
|
||||
// #cgo LDFLAGS: -ldl
|
||||
// #include <stdlib.h>
|
||||
// #include <dlfcn.h>
|
||||
import "C"
|
||||
import (
|
||||
"errors"
|
||||
"fmt"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
var ErrSoNotFound = errors.New("unable to open a handle to the library")
|
||||
|
||||
// LibHandle represents an open handle to a library (.so)
|
||||
type LibHandle struct {
|
||||
Handle unsafe.Pointer
|
||||
Libname string
|
||||
}
|
||||
|
||||
// GetHandle tries to get a handle to a library (.so), attempting to access it
|
||||
// by the names specified in libs and returning the first that is successfully
|
||||
// opened. Callers are responsible for closing the handler. If no library can
|
||||
// be successfully opened, an error is returned.
|
||||
func GetHandle(libs []string) (*LibHandle, error) {
|
||||
for _, name := range libs {
|
||||
libname := C.CString(name)
|
||||
defer C.free(unsafe.Pointer(libname))
|
||||
handle := C.dlopen(libname, C.RTLD_LAZY)
|
||||
if handle != nil {
|
||||
h := &LibHandle{
|
||||
Handle: handle,
|
||||
Libname: name,
|
||||
}
|
||||
return h, nil
|
||||
}
|
||||
}
|
||||
return nil, ErrSoNotFound
|
||||
}
|
||||
|
||||
// GetSymbolPointer takes a symbol name and returns a pointer to the symbol.
|
||||
func (l *LibHandle) GetSymbolPointer(symbol string) (unsafe.Pointer, error) {
|
||||
sym := C.CString(symbol)
|
||||
defer C.free(unsafe.Pointer(sym))
|
||||
|
||||
C.dlerror()
|
||||
p := C.dlsym(l.Handle, sym)
|
||||
e := C.dlerror()
|
||||
if e != nil {
|
||||
return nil, fmt.Errorf("error resolving symbol %q: %v", symbol, errors.New(C.GoString(e)))
|
||||
}
|
||||
|
||||
return p, nil
|
||||
}
|
||||
|
||||
// Close closes a LibHandle.
|
||||
func (l *LibHandle) Close() error {
|
||||
C.dlerror()
|
||||
C.dlclose(l.Handle)
|
||||
e := C.dlerror()
|
||||
if e != nil {
|
||||
return fmt.Errorf("error closing %v: %v", l.Libname, errors.New(C.GoString(e)))
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
57
vendor/github.com/coreos/go-systemd/v22/internal/dlopen/dlopen_example.go
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vendor/github.com/coreos/go-systemd/v22/internal/dlopen/dlopen_example.go
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|
|||
// Copyright 2015 CoreOS, Inc.
|
||||
//
|
||||
// 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.
|
||||
//
|
||||
//go:build linux
|
||||
// +build linux
|
||||
|
||||
package dlopen
|
||||
|
||||
// #include <string.h>
|
||||
// #include <stdlib.h>
|
||||
//
|
||||
// int
|
||||
// my_strlen(void *f, const char *s)
|
||||
// {
|
||||
// size_t (*strlen)(const char *);
|
||||
//
|
||||
// strlen = (size_t (*)(const char *))f;
|
||||
// return strlen(s);
|
||||
// }
|
||||
import "C"
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
func strlen(libs []string, s string) (int, error) {
|
||||
h, err := GetHandle(libs)
|
||||
if err != nil {
|
||||
return -1, fmt.Errorf(`couldn't get a handle to the library: %v`, err)
|
||||
}
|
||||
defer h.Close()
|
||||
|
||||
f := "strlen"
|
||||
cs := C.CString(s)
|
||||
defer C.free(unsafe.Pointer(cs))
|
||||
|
||||
strlen, err := h.GetSymbolPointer(f)
|
||||
if err != nil {
|
||||
return -1, fmt.Errorf(`couldn't get symbol %q: %v`, f, err)
|
||||
}
|
||||
|
||||
len := C.my_strlen(strlen, cs)
|
||||
|
||||
return int(len), nil
|
||||
}
|
66
vendor/github.com/coreos/go-systemd/v22/sdjournal/functions.go
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vendor/github.com/coreos/go-systemd/v22/sdjournal/functions.go
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|
|||
// Copyright 2015 RedHat, Inc.
|
||||
// Copyright 2015 CoreOS, Inc.
|
||||
//
|
||||
// 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 sdjournal
|
||||
|
||||
import (
|
||||
"github.com/coreos/go-systemd/v22/internal/dlopen"
|
||||
"sync"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
var (
|
||||
// lazy initialized
|
||||
libsystemdHandle *dlopen.LibHandle
|
||||
|
||||
libsystemdMutex = &sync.Mutex{}
|
||||
libsystemdFunctions = map[string]unsafe.Pointer{}
|
||||
libsystemdNames = []string{
|
||||
// systemd < 209
|
||||
"libsystemd-journal.so.0",
|
||||
"libsystemd-journal.so",
|
||||
|
||||
// systemd >= 209 merged libsystemd-journal into libsystemd proper
|
||||
"libsystemd.so.0",
|
||||
"libsystemd.so",
|
||||
}
|
||||
)
|
||||
|
||||
func getFunction(name string) (unsafe.Pointer, error) {
|
||||
libsystemdMutex.Lock()
|
||||
defer libsystemdMutex.Unlock()
|
||||
|
||||
if libsystemdHandle == nil {
|
||||
h, err := dlopen.GetHandle(libsystemdNames)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
libsystemdHandle = h
|
||||
}
|
||||
|
||||
f, ok := libsystemdFunctions[name]
|
||||
if !ok {
|
||||
var err error
|
||||
f, err = libsystemdHandle.GetSymbolPointer(name)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
libsystemdFunctions[name] = f
|
||||
}
|
||||
|
||||
return f, nil
|
||||
}
|
1169
vendor/github.com/coreos/go-systemd/v22/sdjournal/journal.go
generated
vendored
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1169
vendor/github.com/coreos/go-systemd/v22/sdjournal/journal.go
generated
vendored
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272
vendor/github.com/coreos/go-systemd/v22/sdjournal/read.go
generated
vendored
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272
vendor/github.com/coreos/go-systemd/v22/sdjournal/read.go
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vendored
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|
@ -0,0 +1,272 @@
|
|||
// Copyright 2015 RedHat, Inc.
|
||||
// Copyright 2015 CoreOS, Inc.
|
||||
//
|
||||
// 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 sdjournal
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"fmt"
|
||||
"io"
|
||||
"log"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
)
|
||||
|
||||
var (
|
||||
// ErrExpired gets returned when the Follow function runs into the
|
||||
// specified timeout.
|
||||
ErrExpired = errors.New("Timeout expired")
|
||||
)
|
||||
|
||||
// JournalReaderConfig represents options to drive the behavior of a JournalReader.
|
||||
type JournalReaderConfig struct {
|
||||
// The Since, NumFromTail and Cursor options are mutually exclusive and
|
||||
// determine where the reading begins within the journal. The order in which
|
||||
// options are written is exactly the order of precedence.
|
||||
Since time.Duration // start relative to a Duration from now
|
||||
NumFromTail uint64 // start relative to the tail
|
||||
Cursor string // start relative to the cursor
|
||||
|
||||
// Show only journal entries whose fields match the supplied values. If
|
||||
// the array is empty, entries will not be filtered.
|
||||
Matches []Match
|
||||
|
||||
// If not empty, the journal instance will point to a journal residing
|
||||
// in this directory. The supplied path may be relative or absolute.
|
||||
Path string
|
||||
|
||||
// If not nil, Formatter will be used to translate the resulting entries
|
||||
// into strings. If not set, the default format (timestamp and message field)
|
||||
// will be used. If Formatter returns an error, Read will stop and return the error.
|
||||
Formatter func(entry *JournalEntry) (string, error)
|
||||
}
|
||||
|
||||
// JournalReader is an io.ReadCloser which provides a simple interface for iterating through the
|
||||
// systemd journal. A JournalReader is not safe for concurrent use by multiple goroutines.
|
||||
type JournalReader struct {
|
||||
journal *Journal
|
||||
msgReader *strings.Reader
|
||||
formatter func(entry *JournalEntry) (string, error)
|
||||
}
|
||||
|
||||
// NewJournalReader creates a new JournalReader with configuration options that are similar to the
|
||||
// systemd journalctl tool's iteration and filtering features.
|
||||
func NewJournalReader(config JournalReaderConfig) (*JournalReader, error) {
|
||||
// use simpleMessageFormatter as default formatter.
|
||||
if config.Formatter == nil {
|
||||
config.Formatter = simpleMessageFormatter
|
||||
}
|
||||
|
||||
r := &JournalReader{
|
||||
formatter: config.Formatter,
|
||||
}
|
||||
|
||||
// Open the journal
|
||||
var err error
|
||||
if config.Path != "" {
|
||||
r.journal, err = NewJournalFromDir(config.Path)
|
||||
} else {
|
||||
r.journal, err = NewJournal()
|
||||
}
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// Add any supplied matches
|
||||
for _, m := range config.Matches {
|
||||
if err = r.journal.AddMatch(m.String()); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
// Set the start position based on options
|
||||
if config.Since != 0 {
|
||||
// Start based on a relative time
|
||||
start := time.Now().Add(config.Since)
|
||||
if err := r.journal.SeekRealtimeUsec(uint64(start.UnixNano() / 1000)); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
} else if config.NumFromTail != 0 {
|
||||
// Start based on a number of lines before the tail
|
||||
if err := r.journal.SeekTail(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// Move the read pointer into position near the tail. Go one further than
|
||||
// the option so that the initial cursor advancement positions us at the
|
||||
// correct starting point.
|
||||
skip, err := r.journal.PreviousSkip(config.NumFromTail + 1)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
// If we skipped fewer lines than expected, we have reached journal start.
|
||||
// Thus, we seek to head so that next invocation can read the first line.
|
||||
if skip != config.NumFromTail+1 {
|
||||
if err := r.journal.SeekHead(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
} else if config.Cursor != "" {
|
||||
// Start based on a custom cursor
|
||||
if err := r.journal.SeekCursor(config.Cursor); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
return r, nil
|
||||
}
|
||||
|
||||
// Read reads entries from the journal. Read follows the Reader interface so
|
||||
// it must be able to read a specific amount of bytes. Journald on the other
|
||||
// hand only allows us to read full entries of arbitrary size (without byte
|
||||
// granularity). JournalReader is therefore internally buffering entries that
|
||||
// don't fit in the read buffer. Callers should keep calling until 0 and/or an
|
||||
// error is returned.
|
||||
func (r *JournalReader) Read(b []byte) (int, error) {
|
||||
if r.msgReader == nil {
|
||||
// Advance the journal cursor. It has to be called at least one time
|
||||
// before reading
|
||||
c, err := r.journal.Next()
|
||||
|
||||
// An unexpected error
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
|
||||
// EOF detection
|
||||
if c == 0 {
|
||||
return 0, io.EOF
|
||||
}
|
||||
|
||||
entry, err := r.journal.GetEntry()
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
|
||||
// Build a message
|
||||
msg, err := r.formatter(entry)
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
r.msgReader = strings.NewReader(msg)
|
||||
}
|
||||
|
||||
// Copy and return the message
|
||||
sz, err := r.msgReader.Read(b)
|
||||
if err == io.EOF {
|
||||
// The current entry has been fully read. Don't propagate this
|
||||
// EOF, so the next entry can be read at the next Read()
|
||||
// iteration.
|
||||
r.msgReader = nil
|
||||
return sz, nil
|
||||
}
|
||||
if err != nil {
|
||||
return sz, err
|
||||
}
|
||||
if r.msgReader.Len() == 0 {
|
||||
r.msgReader = nil
|
||||
}
|
||||
|
||||
return sz, nil
|
||||
}
|
||||
|
||||
// Close closes the JournalReader's handle to the journal.
|
||||
func (r *JournalReader) Close() error {
|
||||
return r.journal.Close()
|
||||
}
|
||||
|
||||
// Rewind attempts to rewind the JournalReader to the first entry.
|
||||
func (r *JournalReader) Rewind() error {
|
||||
r.msgReader = nil
|
||||
return r.journal.SeekHead()
|
||||
}
|
||||
|
||||
// Follow synchronously follows the JournalReader, writing each new journal entry to writer. The
|
||||
// follow will continue until a single time.Time is received on the until channel.
|
||||
func (r *JournalReader) Follow(until <-chan time.Time, writer io.Writer) error {
|
||||
|
||||
// Process journal entries and events. Entries are flushed until the tail or
|
||||
// timeout is reached, and then we wait for new events or the timeout.
|
||||
var msg = make([]byte, 64*1<<(10))
|
||||
var waitCh = make(chan int, 1)
|
||||
var waitGroup sync.WaitGroup
|
||||
defer waitGroup.Wait()
|
||||
|
||||
process:
|
||||
for {
|
||||
c, err := r.Read(msg)
|
||||
if err != nil && err != io.EOF {
|
||||
return err
|
||||
}
|
||||
|
||||
select {
|
||||
case <-until:
|
||||
return ErrExpired
|
||||
default:
|
||||
}
|
||||
if c > 0 {
|
||||
if _, err = writer.Write(msg[:c]); err != nil {
|
||||
return err
|
||||
}
|
||||
continue process
|
||||
}
|
||||
|
||||
// We're at the tail, so wait for new events or time out.
|
||||
// Holds journal events to process. Tightly bounded for now unless there's a
|
||||
// reason to unblock the journal watch routine more quickly.
|
||||
for {
|
||||
waitGroup.Add(1)
|
||||
go func() {
|
||||
status := r.journal.Wait(100 * time.Millisecond)
|
||||
waitCh <- status
|
||||
waitGroup.Done()
|
||||
}()
|
||||
|
||||
select {
|
||||
case <-until:
|
||||
return ErrExpired
|
||||
case e := <-waitCh:
|
||||
switch e {
|
||||
case SD_JOURNAL_NOP:
|
||||
// the journal did not change since the last invocation
|
||||
case SD_JOURNAL_APPEND, SD_JOURNAL_INVALIDATE:
|
||||
continue process
|
||||
default:
|
||||
if e < 0 {
|
||||
return fmt.Errorf("received error event: %d", e)
|
||||
}
|
||||
|
||||
log.Printf("received unknown event: %d\n", e)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// simpleMessageFormatter is the default formatter.
|
||||
// It returns a string representing the current journal entry in a simple format which
|
||||
// includes the entry timestamp and MESSAGE field.
|
||||
func simpleMessageFormatter(entry *JournalEntry) (string, error) {
|
||||
msg, ok := entry.Fields["MESSAGE"]
|
||||
if !ok {
|
||||
return "", fmt.Errorf("no MESSAGE field present in journal entry")
|
||||
}
|
||||
|
||||
usec := entry.RealtimeTimestamp
|
||||
timestamp := time.Unix(0, int64(usec)*int64(time.Microsecond))
|
||||
|
||||
return fmt.Sprintf("%s %s\n", timestamp, msg), nil
|
||||
}
|
Loading…
Add table
Add a link
Reference in a new issue