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
doc.go syslog.go syslog_unix.go
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.
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.
type Priority int
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
) A Writer is a connection to a syslog server.
type Writer struct {
// contains filtered or unexported fields
}
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.
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(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 (w *Writer) Alert(m string) error
Alert logs a message with severity LOG_ALERT, ignoring the severity passed to New.
func (w *Writer) Close() error
Close closes a connection to the syslog daemon.
func (w *Writer) Crit(m string) error
Crit logs a message with severity LOG_CRIT, ignoring the severity passed to New.
func (w *Writer) Debug(m string) error
Debug logs a message with severity LOG_DEBUG, ignoring the severity passed to New.
func (w *Writer) Emerg(m string) error
Emerg logs a message with severity LOG_EMERG, ignoring the severity passed to New.
func (w *Writer) Err(m string) error
Err logs a message with severity LOG_ERR, ignoring the severity passed to New.
func (w *Writer) Info(m string) error
Info logs a message with severity LOG_INFO, ignoring the severity passed to New.
func (w *Writer) Notice(m string) error
Notice logs a message with severity LOG_NOTICE, ignoring the severity passed to New.
func (w *Writer) Warning(m string) error
Warning logs a message with severity LOG_WARNING, ignoring the severity passed to New.
func (w *Writer) Write(b []byte) (int, error)
Write sends a log message to the syslog daemon.
This package is not implemented on Windows. As the syslog package is frozen, Windows users are encouraged to use a package outside of the standard library. For background, see https://golang.org/issue/1108.
This package is not implemented on Plan 9.
© Google, Inc.
Licensed under the Creative Commons Attribution License 3.0.
https://golang.org/pkg/log/syslog/