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signals.go
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signals.go
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// Copyright (c) 2015-2022 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"os"
"os/signal"
)
// trapSignals traps the registered signals and cancel the global context.
func trapSignals(sig ...os.Signal) {
// channel to receive signals.
sigCh := make(chan os.Signal, 1)
defer close(sigCh)
// `signal.Notify` registers the given channel to
// receive notifications of the specified signals.
signal.Notify(sigCh, sig...)
// Wait for the signal.
s := <-sigCh
// Once signal has been received stop signal Notify handler.
signal.Stop(sigCh)
// Stop profiling if enabled, this needs to be before canceling the
// global context to check for any unusual cpu/mem/goroutines usage
stopProfiling()
// Cancel the global context
globalCancel()
var exitCode int
switch s.String() {
case "interrupt":
exitCode = globalCancelExitStatus
case "killed":
exitCode = globalKillExitStatus
case "terminated":
exitCode = globalTerminatExitStatus
default:
exitCode = globalErrorExitStatus
}
os.Exit(exitCode)
}