hunterlong/statup

package utils

import (
    "errors"
    "os"
    "os/exec"
    "regexp"
    "strconv"
    "strings"
)

func DirWritable(path string) (bool, error) {
    info, err := os.Stat(path)
    if err != nil {
        return false, errors.New("path doesn't exist")
    }

    if !info.IsDir() {
        return false, errors.New("path isn't a directory")
    }

    if info.Mode().Perm()&(1<<(uint(7))) == 0 {
        return false, errors.New("write permission bit is not set on this file for user")
    }

    return true, nil
}

func Ping(address string, secondsTimeout int) (int64, error) {
    ping, err := exec.LookPath("ping")
    if err != nil {
        return 0, err
    }
    out, _, err := Command(ping, address, "-n", "1", "-w", strconv.Itoa(secondsTimeout*1000))
    if err != nil {
        return 0, err
    }
    if strings.Contains(out, "Destination Host Unreachable") {
        return 0, errors.New("destination host unreachable")
    }
    r := regexp.MustCompile(`Average = (.*)ms`)
    strs := r.FindStringSubmatch(out)
    if len(strs) < 2 {
        return 0, errors.New("could not parse ping duration")
    }
    f, _ := strconv.ParseFloat(strs[1], 64)
    return int64(f * 1000), nil
}