ermos/hostsfile

package hostsfile

import (
    "fmt"
    "os"
    "runtime"
)

// GetSystemPath returns the path of the hosts file based on the current OS.
func GetSystemPath() (path string, err error) {
    return getSystemPath(runtime.GOOS)
}

// GetSystemPathByOS returns the path of the hosts file based on the given OS.
func GetSystemPathByOS(osName string) (path string, err error) {
    return getSystemPath(osName)
}

// getSystemPath returns the path of the hosts file based on the given OS.
func getSystemPath(osName string) (path string, err error) {
    switch osName {
    case "linux", "darwin", "aix", "dragonfly", "freebsd", "ios", "netbsd", "openbsd", "solaris":
        path = "/etc/hosts"
    case "windows":
        path = fmt.Sprintf(`%s\System32\drivers\etc\hosts`, os.Getenv("SystemRoot"))
    case "android":
        if _, err = statFile("/system/etc/hosts"); err != nil {
            path = "/etc/hosts"
            break
        }
        path = "/system/etc/hosts"
    case "hurd":
        if _, err = statFile("/hurd/hosts"); err != nil {
            path = "/etc/hosts"
            break
        }
        path = "/hurd/hosts"
    case "illumos":
        path = "/etc/inet/hosts"
    case "plan9":
        path = "/lib/ndb/local"
    case "zos":
        path = "SYS1.PARMLIB(HOSTS)"
    default:
        return "", ErrUnsupportedOperatingSystem
    }

    return path, nil
}