02485e8657
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com> Upstream-commit: 7acea2a243d25c061d12a2a2f8bbd4e5955a85f4 Component: engine
61 lines
1.2 KiB
Go
61 lines
1.2 KiB
Go
package runc
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import (
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"os/exec"
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"syscall"
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"time"
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)
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var Monitor ProcessMonitor = &defaultMonitor{}
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type Exit struct {
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Timestamp time.Time
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Pid int
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Status int
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}
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// ProcessMonitor is an interface for process monitoring
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//
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// It allows daemons using go-runc to have a SIGCHLD handler
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// to handle exits without introducing races between the handler
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// and go's exec.Cmd
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// These methods should match the methods exposed by exec.Cmd to provide
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// a consistent experience for the caller
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type ProcessMonitor interface {
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Start(*exec.Cmd) (chan Exit, error)
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Wait(*exec.Cmd, chan Exit) (int, error)
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}
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type defaultMonitor struct {
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}
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func (m *defaultMonitor) Start(c *exec.Cmd) (chan Exit, error) {
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if err := c.Start(); err != nil {
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return nil, err
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}
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ec := make(chan Exit, 1)
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go func() {
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var status int
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if err := c.Wait(); err != nil {
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status = 255
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if exitErr, ok := err.(*exec.ExitError); ok {
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if ws, ok := exitErr.Sys().(syscall.WaitStatus); ok {
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status = ws.ExitStatus()
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}
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}
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}
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ec <- Exit{
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Timestamp: time.Now(),
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Pid: c.Process.Pid,
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Status: status,
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}
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close(ec)
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}()
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return ec, nil
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}
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func (m *defaultMonitor) Wait(c *exec.Cmd, ec chan Exit) (int, error) {
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e := <-ec
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return e.Status, nil
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}
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