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get the realtime output for a shell command in golang
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| package main | |
| import ( | |
| "bufio" | |
| "fmt" | |
| "io" | |
| "os" | |
| "os/exec" | |
| "strings" | |
| ) | |
| func main() { | |
| cmdName := "ping 127.0.0.1" | |
| cmdArgs := strings.Fields(cmdName) | |
| cmd := exec.Command(cmdArgs[0], cmdArgs[1:len(cmdArgs)]...) | |
| stdout, _ := cmd.StdoutPipe() | |
| cmd.Start() | |
| oneByte := make([]byte, 100) | |
| num := 1 | |
| for { | |
| _, err := stdout.Read(oneByte) | |
| if err != nil { | |
| fmt.Printf(err.Error()) | |
| break | |
| } | |
| r := bufio.NewReader(stdout) | |
| line, _, _ := r.ReadLine() | |
| fmt.Println(string(line)) | |
| num = num + 1 | |
| if num > 3 { | |
| os.Exit(0) | |
| } | |
| } | |
| cmd.Wait() | |
| } |
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