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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/policy/policy_path_parser.h"
#include "base/basictypes.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#import "base/mac/scoped_nsautorelease_pool.h"
#include "base/strings/sys_string_conversions.h"
#include "policy/policy_constants.h"
#import <Cocoa/Cocoa.h>
#import <SystemConfiguration/SCDynamicStore.h>
#import <SystemConfiguration/SCDynamicStoreCopySpecific.h>
#import <SystemConfiguration/SystemConfiguration.h>
#include <string>
namespace policy {
namespace path_parser {
const char* kUserNamePolicyVarName = "${user_name}";
const char* kMachineNamePolicyVarName = "${machine_name}";
const char* kMacUsersDirectory = "${users}";
const char* kMacDocumentsFolderVarName = "${documents}";
struct MacFolderNamesToSPDMaping {
const char* name;
NSSearchPathDirectory id;
};
// Mapping from variable names to MacOS NSSearchPathDirectory ids.
const MacFolderNamesToSPDMaping mac_folder_mapping[] = {
{ kMacUsersDirectory, NSUserDirectory},
{ kMacDocumentsFolderVarName, NSDocumentDirectory}
};
// Replaces all variable occurrences in the policy string with the respective
// system settings values.
base::FilePath::StringType ExpandPathVariables(
const base::FilePath::StringType& untranslated_string) {
base::FilePath::StringType result(untranslated_string);
if (result.length() == 0)
return result;
// Sanitize quotes in case of any around the whole string.
if (result.length() > 1 &&
((result[0] == '"' && result[result.length() - 1] == '"') ||
(result[0] == '\'' && result[result.length() - 1] == '\''))) {
// Strip first and last char which should be matching quotes now.
result = result.substr(1, result.length() - 2);
}
// First translate all path variables we recognize.
for (size_t i = 0; i < arraysize(mac_folder_mapping); ++i) {
size_t position = result.find(mac_folder_mapping[i].name);
if (position != std::string::npos) {
NSArray* searchpaths = NSSearchPathForDirectoriesInDomains(
mac_folder_mapping[i].id, NSAllDomainsMask, true);
if ([searchpaths count] > 0) {
NSString *variable_value = [searchpaths objectAtIndex:0];
result.replace(position, strlen(mac_folder_mapping[i].name),
base::SysNSStringToUTF8(variable_value));
}
}
}
// Next translate two special variables ${user_name} and ${machine_name}
size_t position = result.find(kUserNamePolicyVarName);
if (position != std::string::npos) {
NSString* username = NSUserName();
if (username) {
result.replace(position, strlen(kUserNamePolicyVarName),
base::SysNSStringToUTF8(username));
} else {
LOG(ERROR) << "Username variable can not be resolved.";
}
}
position = result.find(kMachineNamePolicyVarName);
if (position != std::string::npos) {
SCDynamicStoreContext context = { 0, NULL, NULL, NULL };
SCDynamicStoreRef store = SCDynamicStoreCreate(kCFAllocatorDefault,
CFSTR("policy_subsystem"),
NULL, &context);
CFStringRef machinename = SCDynamicStoreCopyLocalHostName(store);
if (machinename) {
result.replace(position, strlen(kMachineNamePolicyVarName),
base::SysCFStringRefToUTF8(machinename));
CFRelease(machinename);
} else {
int error = SCError();
LOG(ERROR) << "Machine name variable can not be resolved. Error: "
<< error << " - " << SCErrorString(error);
}
CFRelease(store);
}
return result;
}
void CheckUserDataDirPolicy(base::FilePath* user_data_dir) {
base::mac::ScopedNSAutoreleasePool pool;
// Since the configuration management infrastructure is not initialized when
// this code runs, read the policy preference directly.
NSString* key = base::SysUTF8ToNSString(policy::key::kUserDataDir);
NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
NSString* value = [defaults stringForKey:key];
if (value && [defaults objectIsForcedForKey:key]) {
std::string string_value = base::SysNSStringToUTF8(value);
// Now replace any vars the user might have used.
string_value = policy::path_parser::ExpandPathVariables(string_value);
*user_data_dir = base::FilePath(string_value);
}
}
} // namespace path_parser
} // namespace policy
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