Example #1
0
func Shell(call []string) error {
	var in *common.BufferedReader
	interactive := true
	if len(call) > 2 {
		call = call[0:1]
	}
	if len(call) == 2 {
		f, err := os.Open(call[1])
		if err != nil {
			return err
		}
		defer f.Close()
		in = common.NewBufferedReader(f)
		interactive = false
	} else {
		in = common.NewBufferedReader(os.Stdin)
	}

	var err error
	var line string
	for err == nil {
		if interactive {
			fmt.Print("> ")
		}
		line, err = in.ReadWholeLine()
		if err != nil {
			return err
		}
		if isComment(line) {
			continue
		}
		params, ce := common.Parameterize(line)
		if ce != nil {
			common.DumpError(ce)
			continue
		}
		ce = execute(params)
		if ce != nil {
			common.DumpError(ce)
			continue
		}
	}
	return nil
}
Example #2
0
func dumpFile(path string) error {
	f, err := os.Open(path)
	if err != nil {
		return err
	}
	defer f.Close()

	r := common.NewBufferedReader(f)

	line, err := r.ReadWholeLine()
	for i := uint(0); i < *numLines && err == nil; i++ {
		fmt.Println(line)
		line, err = r.ReadWholeLine()
	}
	if err == io.EOF {
		err = nil
	}
	return err
}
Example #3
0
func doGrep(pattern *regexp.Regexp, fh io.Reader, fn string, print_fn bool) {
	buf := common.NewBufferedReader(fh)

	for {
		line, err := buf.ReadWholeLine()
		if err != nil {
			fmt.Fprintf(os.Stderr, "Error while reading from %s: %v\n", fn, err)
			return
		}
		if line == "" {
			break
		}

		if pattern.MatchString(line) {
			if print_fn {
				fmt.Printf("%s:", fn)
			}
			fmt.Printf("%s\n", line)
		}
	}
}