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oci_kill_linux.go
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/
oci_kill_linux.go
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// Copyright (c) 2018-2019, Sylabs Inc. All rights reserved.
// This software is licensed under a 3-clause BSD license. Please consult the
// LICENSE.md file distributed with the sources of this project regarding your
// rights to use or distribute this software.
package singularity
import (
"fmt"
"io"
"syscall"
"time"
"github.com/sylabs/singularity/internal/pkg/util/signal"
"github.com/sylabs/singularity/pkg/ociruntime"
"github.com/sylabs/singularity/pkg/util/unix"
)
// OciKill kills container process
func OciKill(containerID string, killSignal string, killTimeout int) error {
// send signal to the instance
state, err := getState(containerID)
if err != nil {
return err
}
if state.Status != ociruntime.Created && state.Status != ociruntime.Running {
return fmt.Errorf("cannot kill '%s', the state of the container must be created or running", containerID)
}
sig := syscall.SIGTERM
if killSignal != "" {
sig, err = signal.Convert(killSignal)
if err != nil {
return err
}
}
if killTimeout > 0 {
c, err := unix.Dial(state.ControlSocket)
if err != nil {
return fmt.Errorf("failed to connect to control socket")
}
defer c.Close()
killed := make(chan bool, 1)
go func() {
// wait runtime close socket connection for ACK
d := make([]byte, 1)
if _, err := c.Read(d); err == io.EOF {
killed <- true
}
}()
if err := syscall.Kill(state.Pid, sig); err != nil {
return err
}
select {
case <-killed:
case <-time.After(time.Duration(killTimeout) * time.Second):
return syscall.Kill(state.Pid, syscall.SIGKILL)
}
} else {
return syscall.Kill(state.Pid, sig)
}
return nil
}