src/paths.go

   1 //
   2 // Armadillo File Manager
   3 // Copyright (c) 2010, Robert Sesek <http://www.bluestatic.org>
   4 //
   5 // This program is free software: you can redistribute it and/or modify it under
   6 // the terms of the GNU General Public License as published by the Free Software
   7 // Foundation, either version 3 of the License, or any later version.
   8 //
   9
  10 package paths
  11
  12 import (
  13   "container/vector"
  14   "os"
  15   "path"
  16   "strings"
  17   "./config"
  18 )
  19
  20 var gJailRoot string;
  21
  22 func SetConfig(aConfig *config.Configuration) {
  23   gJailRoot = aConfig.JailRoot
  24 }
  25
  26 func canonicalizePath(raw_path string) string {
  27   raw_path = path.Join(gJailRoot, raw_path)
  28   return path.Clean(raw_path)
  29 }
  30
  31 func checkInJail(the_path string) bool {
  32   if len(the_path) < len(gJailRoot) {
  33     return false
  34   }
  35   if the_path[0:len(gJailRoot)] != gJailRoot {
  36     return false
  37   }
  38   if strings.Index(the_path, "../") != -1 {
  39     return false
  40   }
  41   return true
  42 }
  43
  44 func List(the_path string) (files vector.StringVector, err os.Error) {
  45   full_path := canonicalizePath(the_path)
  46   if !checkInJail(full_path) {
  47     return nil, os.NewError("Path outside of jail")
  48   }
  49
  50   fd, file_error := os.Open(full_path, os.O_RDONLY, 0)
  51   if file_error != nil {
  52     return nil, file_error
  53   }
  54
  55   fileinfos, read_err := fd.Readdir(-1)
  56   if read_err != nil {
  57     return nil, read_err
  58   }
  59
  60   for _, info := range fileinfos {
  61     name := info.Name
  62     if info.IsDirectory() {
  63       name += "/"
  64     }
  65     files.Push(name)
  66   }
  67   return files, nil
  68 }
  69
  70 func Remove(the_path string) os.Error {
  71   full_path := canonicalizePath(the_path)
  72   if !checkInJail(full_path) {
  73     return os.NewError("Path outside of jail")
  74   }
  75   return os.RemoveAll(full_path)
  76 }
  77
  78 func Move(source string, target string) os.Error {
  79   source = canonicalizePath(source)
  80   target = canonicalizePath(target)
  81   if !checkInJail(source) {
  82     return os.NewError("Source outside of jail")
  83   }
  84   if !checkInJail(target) {
  85     return os.NewError("Target outside of jail")
  86   }
  87   return os.Rename(source, target)
  88 }