forked from coreos/go-log
/
syslog.go
76 lines (69 loc) · 1.71 KB
/
syslog.go
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// Copyright 2014 Yieldr
//
// 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 log
import (
"fmt"
"log/syslog"
)
type syslogSink struct {
w *syslog.Writer
priority Priority
format string
fields []string
}
func (sink *syslogSink) Log(fields Fields) {
vals := make([]interface{}, len(sink.fields))
for i, field := range sink.fields {
var ok bool
vals[i], ok = fields[field]
if !ok {
vals[i] = "???"
}
}
msg := fmt.Sprintf(sink.format, vals...)
switch fields["priority"].(Priority) {
case PriEmerg:
sink.w.Emerg(msg)
case PriAlert:
sink.w.Alert(msg)
case PriCrit:
sink.w.Crit(msg)
case PriErr:
sink.w.Err(msg)
case PriWarning:
sink.w.Warning(msg)
case PriNotice:
sink.w.Notice(msg)
case PriInfo:
sink.w.Info(msg)
case PriDebug:
sink.w.Debug(msg)
default:
sink.w.Err(msg)
}
}
func (s *syslogSink) Write(b []byte) (int, error) {
return s.w.Write(b)
}
func (s *syslogSink) Close() error {
return s.w.Close()
}
func SyslogSink(p Priority, format string, fields []string) (*syslogSink, error) {
prio := syslog.Priority(p) | syslog.LOG_USER
w, err := syslog.New(prio, executableName())
if err != nil {
return nil, err
}
return &syslogSink{w, p, format, fields}, nil
}