You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
844 B
55 lines
844 B
package kexec
|
|
|
|
import (
|
|
"errors"
|
|
"os/exec"
|
|
"sync"
|
|
)
|
|
|
|
type KCommand struct {
|
|
*exec.Cmd
|
|
|
|
errCs []chan error
|
|
err error
|
|
finished bool
|
|
once sync.Once
|
|
mu sync.Mutex
|
|
}
|
|
|
|
func (c *KCommand) Run() error {
|
|
if err := c.Start(); err != nil {
|
|
return err
|
|
}
|
|
return c.Wait()
|
|
}
|
|
|
|
// This Wait wraps exec.Wait, but support multi call
|
|
func (k *KCommand) Wait() error {
|
|
if k.Process == nil {
|
|
return errors.New("exec: not started")
|
|
}
|
|
k.once.Do(func() {
|
|
if k.errCs == nil {
|
|
k.errCs = make([]chan error, 0)
|
|
}
|
|
go func() {
|
|
k.err = k.Cmd.Wait()
|
|
k.mu.Lock()
|
|
k.finished = true
|
|
for _, errC := range k.errCs {
|
|
errC <- k.err
|
|
}
|
|
k.mu.Unlock()
|
|
}()
|
|
})
|
|
k.mu.Lock()
|
|
if k.finished {
|
|
k.mu.Unlock()
|
|
return k.err
|
|
}
|
|
errC := make(chan error, 1)
|
|
k.errCs = append(k.errCs, errC)
|
|
k.mu.Unlock()
|
|
return <-errC
|
|
}
|