package syslog

import "log/syslog"

Package syslog provides a simple interface to the system log service. It can send messages to the syslog daemon using UNIX domain sockets, UDP or TCP.

Only one call to Dial is necessary. On write failures, the syslog client will attempt to reconnect to the server and write again.

The syslog package is frozen and is not accepting new features. Some external packages provide more functionality. See: 

https://godoc.org/?q=syslog

Index

Examples

Functions

func NewLogger

func NewLogger(p Priority, logFlag int) (*log.Logger, error)

NewLogger creates a log.Logger whose output is written to the system log service with the specified priority, a combination of the syslog facility and severity. The logFlag argument is the flag set passed through to log.New to create the Logger.

Types

type Priority

type Priority int

The Priority is a combination of the syslog facility and severity. For example, LOG_ALERT | LOG_FTP sends an alert severity message from the FTP facility. The default severity is LOG_EMERG; the default facility is LOG_KERN. 

const (

	// From /usr/include/sys/syslog.h.
	// These are the same on Linux, BSD, and OS X.
	LOG_EMERG Priority = iota
	LOG_ALERT
	LOG_CRIT
	LOG_ERR
	LOG_WARNING
	LOG_NOTICE
	LOG_INFO
	LOG_DEBUG
)
const (

	// From /usr/include/sys/syslog.h.
	// These are the same up to LOG_FTP on Linux, BSD, and OS X.
	LOG_KERN Priority = iota << 3
	LOG_USER
	LOG_MAIL
	LOG_DAEMON
	LOG_AUTH
	LOG_SYSLOG
	LOG_LPR
	LOG_NEWS
	LOG_UUCP
	LOG_CRON
	LOG_AUTHPRIV
	LOG_FTP

	LOG_LOCAL0
	LOG_LOCAL1
	LOG_LOCAL2
	LOG_LOCAL3
	LOG_LOCAL4
	LOG_LOCAL5
	LOG_LOCAL6
	LOG_LOCAL7
)

type Writer

type Writer struct {
	// contains filtered or unexported fields
}

A Writer is a connection to a syslog server.

func Dial
func Dial(network, raddr string, priority Priority, tag string) (*Writer, error)

Dial establishes a connection to a log daemon by connecting to address raddr on the specified network. Each write to the returned writer sends a log message with the facility and severity (from priority) and tag. If tag is empty, the os.Args[0] is used. If network is empty, Dial will connect to the local syslog server. Otherwise, see the documentation for net.Dial for valid values of network and raddr.

Example 
package main

import (
	"fmt"
	"log"
	"log/syslog"
)

func main() {
	sysLog, err := syslog.Dial("tcp", "localhost:1234",
		syslog.LOG_WARNING|syslog.LOG_DAEMON, "demotag")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Fprintf(sysLog, "This is a daemon warning with demotag.")
	sysLog.Emerg("And this is a daemon emergency with demotag.")
}
func New
func New(priority Priority, tag string) (*Writer, error)

New establishes a new connection to the system log daemon. Each write to the returned writer sends a log message with the given priority (a combination of the syslog facility and severity) and prefix tag. If tag is empty, the os.Args[0] is used.

func (*Writer) Alert
func (w *Writer) Alert(m string) error

Alert logs a message with severity LOG_ALERT, ignoring the severity passed to New.

func (*Writer) Close
func (w *Writer) Close() error

Close closes a connection to the syslog daemon.

func (*Writer) Crit
func (w *Writer) Crit(m string) error

Crit logs a message with severity LOG_CRIT, ignoring the severity passed to New.

func (*Writer) Debug
func (w *Writer) Debug(m string) error

Debug logs a message with severity LOG_DEBUG, ignoring the severity passed to New.

func (*Writer) Emerg
func (w *Writer) Emerg(m string) error

Emerg logs a message with severity LOG_EMERG, ignoring the severity passed to New.

func (*Writer) Err
func (w *Writer) Err(m string) error

Err logs a message with severity LOG_ERR, ignoring the severity passed to New.

func (*Writer) Info
func (w *Writer) Info(m string) error

Info logs a message with severity LOG_INFO, ignoring the severity passed to New.

func (*Writer) Notice
func (w *Writer) Notice(m string) error

Notice logs a message with severity LOG_NOTICE, ignoring the severity passed to New.

func (*Writer) Warning
func (w *Writer) Warning(m string) error

Warning logs a message with severity LOG_WARNING, ignoring the severity passed to New.

func (*Writer) Write
func (w *Writer) Write(b []byte) (int, error)

Write sends a log message to the syslog daemon.