70 lines
2.1 KiB
Go
70 lines
2.1 KiB
Go
package executor
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import (
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"fmt"
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"os"
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"syscall"
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)
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// configure new process group for child process
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func (e *UniversalExecutor) setNewProcessGroup() error {
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// We need to check that as build flags includes windows for this file
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if e.childCmd.SysProcAttr == nil {
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e.childCmd.SysProcAttr = &syscall.SysProcAttr{}
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}
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e.childCmd.SysProcAttr.CreationFlags = syscall.CREATE_NEW_PROCESS_GROUP
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return nil
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}
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// Cleanup any still hanging user processes
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func (e *UniversalExecutor) cleanupChildProcesses(proc *os.Process) error {
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// We must first verify if the process is still running.
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// (Windows process often lingered around after being reported as killed).
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handle, err := syscall.OpenProcess(syscall.PROCESS_TERMINATE|syscall.SYNCHRONIZE|syscall.PROCESS_QUERY_INFORMATION, false, uint32(proc.Pid))
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if err != nil {
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return os.NewSyscallError("OpenProcess", err)
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}
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defer syscall.CloseHandle(handle)
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result, err := syscall.WaitForSingleObject(syscall.Handle(handle), 0)
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switch result {
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case syscall.WAIT_OBJECT_0:
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return nil
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case syscall.WAIT_TIMEOUT:
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// Process still running. Just kill it.
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return proc.Kill()
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default:
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return os.NewSyscallError("WaitForSingleObject", err)
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}
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}
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// Send a Ctrl-Break signal for shutting down the process,
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// like in https://golang.org/src/os/signal/signal_windows_test.go
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func sendCtrlBreak(pid int) error {
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dll, err := syscall.LoadDLL("kernel32.dll")
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if err != nil {
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return fmt.Errorf("Error loading kernel32.dll: %v", err)
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}
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proc, err := dll.FindProc("GenerateConsoleCtrlEvent")
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if err != nil {
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return fmt.Errorf("Cannot find procedure GenerateConsoleCtrlEvent: %v", err)
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}
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result, _, err := proc.Call(syscall.CTRL_BREAK_EVENT, uintptr(pid))
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if result == 0 {
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return fmt.Errorf("Error sending ctrl-break event: %v", err)
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}
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return nil
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}
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// Send the process a Ctrl-Break event, allowing it to shutdown by itself
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// before being Terminate.
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func (e *UniversalExecutor) shutdownProcess(_ os.Signal, proc *os.Process) error {
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if err := sendCtrlBreak(proc.Pid); err != nil {
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return fmt.Errorf("executor shutdown error: %v", err)
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}
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e.logger.Debug("sent Ctrl-Break to process", "pid", proc.Pid)
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return nil
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}
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