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get the realtime output for a shell command in golang|-|{"files":{"shell_output.go":{"env":"plain"}},"tag":"bigdata"}
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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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