github.com/minio/mc@v0.0.0-20240503112107-b471de8d1882/cmd/signals.go (about)

     1  // Copyright (c) 2015-2022 MinIO, Inc.
     2  //
     3  // This file is part of MinIO Object Storage stack
     4  //
     5  // This program is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU Affero General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // This program is distributed in the hope that it will be useful
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13  // GNU Affero General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU Affero General Public License
    16  // along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package cmd
    19  
    20  import (
    21  	"os"
    22  	"os/signal"
    23  )
    24  
    25  // trapSignals traps the registered signals and cancel the global context.
    26  func trapSignals(sig ...os.Signal) {
    27  	// channel to receive signals.
    28  	sigCh := make(chan os.Signal, 1)
    29  	defer close(sigCh)
    30  
    31  	// `signal.Notify` registers the given channel to
    32  	// receive notifications of the specified signals.
    33  	signal.Notify(sigCh, sig...)
    34  
    35  	// Wait for the signal.
    36  	s := <-sigCh
    37  
    38  	// Once signal has been received stop signal Notify handler.
    39  	signal.Stop(sigCh)
    40  
    41  	// Stop profiling if enabled, this needs to be before canceling the
    42  	// global context to check for any unusual cpu/mem/goroutines usage
    43  	stopProfiling()
    44  
    45  	// Cancel the global context
    46  	globalCancel()
    47  
    48  	var exitCode int
    49  	switch s.String() {
    50  	case "interrupt":
    51  		exitCode = globalCancelExitStatus
    52  	case "killed":
    53  		exitCode = globalKillExitStatus
    54  	case "terminated":
    55  		exitCode = globalTerminatExitStatus
    56  	default:
    57  		exitCode = globalErrorExitStatus
    58  	}
    59  	os.Exit(exitCode)
    60  }