56 lines
1.1 KiB
Go
56 lines
1.1 KiB
Go
package spawn
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import (
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"fmt"
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"io"
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"os/exec"
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)
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func Spawn() {
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// Cmd object represents the external process
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dateCmd := exec.Command("date")
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// Runs and wait for it to finish, output collected
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dateOut, err := dateCmd.Output()
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if err != nil {
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panic(err)
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}
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fmt.Println("> date")
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fmt.Println(string(dateOut))
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_, err = exec.Command("date", "-x").Output()
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if err != nil {
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switch e := err.(type) {
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case *exec.Error:
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fmt.Println("failed executing:", err)
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case *exec.ExitError:
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fmt.Println("command exit code:", e.ExitCode())
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default:
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panic(err)
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}
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}
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grepCmd := exec.Command("grep", "hello")
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grepIn, _ := grepCmd.StdinPipe()
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grepOut, _ := grepCmd.StdoutPipe()
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grepCmd.Start()
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grepIn.Write([]byte("hello world\ngoodbye grep\nI am Jin, hello"))
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grepIn.Close()
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grepBytes, _ := io.ReadAll(grepOut)
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grepCmd.Wait()
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fmt.Println("> grep hello")
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fmt.Println(string(grepBytes))
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lsCmd := exec.Command("bash", "-c", "ls -a -l -h")
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lsOut, err := lsCmd.Output()
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if err != nil {
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panic(err)
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}
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fmt.Println("> ls -a -l -h")
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fmt.Println(string(lsOut))
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}
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