golang可以编写shell脚本吗
golang是可以编写shell脚本,首先可以通过创建一个阅读器去访问键盘,每当按下回车键时,任何的写入都会被存储到输入变量中;然后根据出入的数据来执行逻辑运算;最后将处理结果使用“fmt.Println()”将数据输出即可。
代码示例:
package mAIn import ( "bufio" "errors" "fmt" "os" "os/exec" "strings") func main() { reader := bufio.NewReader(os.Stdin) for { fmt.Print("> ") // Read the keyboad input. input, err := reader.ReadString('n') if err != nil { fmt.Fprintln(os.Stderr, err) } // Handle the execution of the input. err = execInput(input) if err != nil { fmt.Fprintln(os.Stderr, err) } } } // ErrNoPath is returned when 'cd' was called without a second argument.var ErrNoPath = errors.New("path required") func execInput(input string) error { // Remove the newline character. input = strings.TrimSuffix(input, "n") // Split the input separate the command and the arguments. args := strings.Split(input, " ") // Check for built-in commands. Switch args[0] { case "cd": // 'cd' to home with empty path not yet supported. if len(args) < 2 { return ErrNoPath } err := os.Chdir(args[1]) if err != nil { return err } // Stop further processing. return nil case "exit": os.Exit(0) } // Prepare the command to execute. cmd := exec.Command(args[0], args[1:]...) // Set the correct output device. cmd.Stderr = os.Stderr cmd.Stdout = os.Stdout // Execute the command and save it's output. err := cmd.Run() if err != nil { return err } return nil}