1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include <pwd.h>
6
7#include "chrome/browser/policy/policy_path_parser.h"
8
9#include "base/logging.h"
10
11namespace policy {
12
13namespace path_parser {
14
15const char* kMachineNamePolicyVarName = "${machine_name}";
16const char* kUserNamePolicyVarName = "${user_name}";
17
18// Replaces all variable occurrences in the policy string with the respective
19// system settings values.
20FilePath::StringType ExpandPathVariables(
21    const FilePath::StringType& untranslated_string) {
22  FilePath::StringType result(untranslated_string);
23  // Translate two special variables ${user_name} and ${machine_name}
24  size_t position = result.find(kUserNamePolicyVarName);
25  if (position != std::string::npos) {
26    struct passwd* user = getpwuid(geteuid());
27    if (user) {
28      result.replace(position, strlen(kUserNamePolicyVarName), user->pw_name);
29    } else {
30      LOG(ERROR) << "Username variable can not be resolved. ";
31    }
32  }
33  position = result.find(kMachineNamePolicyVarName);
34  if (position != std::string::npos) {
35    char machinename[255];
36    if (gethostname(machinename, 255) == 0) {
37      result.replace(position, strlen(kMachineNamePolicyVarName), machinename);
38    } else {
39      LOG(ERROR) << "Machine name variable can not be resolved.";
40    }
41  }
42  return result;
43}
44
45}  // namespace path_parser
46
47}  // namespace policy
48