/
sigtrap.go
50 lines (41 loc) · 1.27 KB
/
sigtrap.go
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// Copyright 2019 Aporeto 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.
// +build linux darwin
package logutils
import (
"os"
"os/signal"
"syscall"
"go.uber.org/zap"
)
func handleElevationSignal(cfg zap.Config) {
defaultLevel := cfg.Level
var elevated bool
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGUSR1)
for s := range c {
if s == syscall.SIGINT {
return
}
elevated = !elevated
if elevated {
cfg.Level = zap.NewAtomicLevelAt(zap.DebugLevel)
l, _ := cfg.Build()
zap.ReplaceGlobals(l)
zap.L().Info("Log level elevated to debug")
} else {
zap.L().Info("Log level restored to original configuration", zap.Stringer("level", defaultLevel.Level()))
cfg.Level = defaultLevel
l, _ := cfg.Build()
zap.ReplaceGlobals(l)
}
}
}