给出以下代码：
package main
import (
"os"
"fmt"
"os/exec"
"os/signal"
"syscall"
)
const NUMBER_OF_PEASANTS = 3
func createPeasants() map[string]*exec.Cmd {
peasants := map[string]*exec.Cmd{}
for i := 0; i < NUMBER_OF_PEASANTS; i++ {
name := fmt.Sprintf("peasant#%d", i + 1)
fmt.Printf("[master] Start %s...\n", name)
cmd := exec.Command(os.Args[0], name)
cmd.Stderr = os.Stderr
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
if err := cmd.Start(); err != nil {
panic(err)
}
peasants[name] = cmd
}
return peasants
}
func masterWaitForSignal(c chan os.Signal) {
for true {
s := <-c
fmt.Printf("[master] Got signal %v but still running...\n", s)
}
}
func peasantWaitForSignal(name string, c chan os.Signal) {
s := <-c
fmt.Printf("[%s] Got signal %v and will exit not with code 66\n", name, s)
os.Exit(66)
}
func waitForPeasants(peasants map[string]*exec.Cmd) {
for name, peasant := range peasants {
if err := peasant.Wait(); err != nil {
if exitError, ok := err.(*exec.ExitError); ok {
waitStatus := exitError.Sys().(syscall.WaitStatus)
fmt.Printf("[master] %s ended with exit code %d.\n", name, waitStatus.ExitStatus())
} else {
panic(err)
}
}
}
}
func actAsMaster() {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
peasants := createPeasants()
fmt.Printf("[master] Started.\n")
go masterWaitForSignal(c)
waitForPeasants(peasants)
fmt.Printf("[master] Done.\n")
}
func actAsPeasant(name string) {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
fmt.Printf("[%s] Started.\n", name)
peasantWaitForSignal(name, c)
fmt.Printf("[%s] Done.\n", name)
}
func main() {
if len(os.Args) > 1 {
actAsPeasant(os.Args[1])
} else {
actAsMaster()
}
}
如何防止孩子收到中断信号？但我不想改写孩子。需要改变调用过程。