cmd.Stdout = os.Stdout cmd.Stderr = os.Stderr
但我希望stdout和stderr作为字符串变量从runBashCommandAndKillifTooslow函数返回,而不立即打印到控制台.
怎么实现这个?
代码:
package mainimport ( "fmt" "log" "os" "os/exec" "time")func main() { ok,outString,errString := runBashCommandAndKillifTooslow("ls -la",2000) fmt.Println("ok") fmt.Println(ok) fmt.Println("outString") fmt.Println(outString) fmt.Println("errString") fmt.Println(errString)}/*run bash command and kill it if it works longer than "killinMilliSeconds" milliseconds*/func runBashCommandAndKillifTooslow(command string,killinMilliSeconds time.Duration) (okResult bool,stdout,stderr string) { fmt.Println("running bash command...") fmt.Println(command) cmd := exec.Command("sh","-c",command) cmd.Stdout = os.Stdout // cmd.Stdout -> stdout cmd.Stderr = os.Stderr // cmd.Stderr -> stderr okResult = true err := cmd.Start() log.Printf("Waiting for command to finish...") done := make(chan error,1) go func() { done <- cmd.Wait() }() select { case <-time.After(killinMilliSeconds * time.Millisecond): if err := cmd.Process.Kill(); err != nil { log.Fatal("Failed to kill: ",err) okResult = false } <-done // allow goroutine to exit // log.Println("process killed") case err := <-done: if err != nil { log.Printf("process done with error = %v",err) okResult = false } } if err != nil { log.Fatal(err) okResult = false } return}
顺便说一下,如果程序太慢(killinMilliSeconds参数),程序应该保留杀死bash命令的能力.
将输出设置为 bytes.Buffer:var outbuf,errbuf bytes.Buffercmd.Stdout = &outbufcmd.Stderr = &errbuf
运行该命令后,可以通过调用Buffer.String()方法将stdout和stderr作为字符串获取:
stdout := outbuf.String()stderr := errbuf.String()总结
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