module/krate-builder.cpp

   1 /*
   2  *  Copyright (c) 2015 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  *  Licensed under the Apache License, Version 2.0 (the "License");
   5  *  you may not use this file except in compliance with the License.
   6  *  You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  *  Unless required by applicable law or agreed to in writing, software
  11  *  distributed under the License is distributed on an "AS IS" BASIS,
  12  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  *  See the License for the specific language governing permissions and
  14  *  limitations under the License
  15  */
  16 #include <fcntl.h>
  17 #include <unistd.h>
  18 #include <sys/stat.h>
  19 #include <sys/types.h>
  20 #include <sys/mount.h>
  21
  22 #include "krate-builder.h"
  23
  24 #include <klay/exception.h>
  25 #include <klay/filesystem.h>
  26
  27 KrateBuilder::KrateBuilder(const runtime::User& user, const std::string& manifestPath) :
  28         name(user.getName()), uid(user.getUid()), gid(user.getGid())
  29 {
  30         runtime::File data(manifestPath);
  31         if (data.exists()) {
  32                 manifest.reset(xml::Parser::parseFile(manifestPath));
  33         }
  34 }
  35
  36 KrateBuilder::~KrateBuilder()
  37 {
  38 }
  39
  40 void KrateBuilder::bindFilesystemNode(const std::string& source, const std::string& target,
  41                                                                          const std::string& type, const std::string& options,
  42                                                                          bool create)
  43 {
  44         if (create) {
  45                 runtime::File dir(target);
  46                 if (!dir.exists()) {
  47                         dir.makeDirectory(true, uid, gid);
  48                 }
  49         }
  50
  51         runtime::Mount::mountEntry(source, target, type, options);
  52 }
  53
  54 void KrateBuilder::mountOwnFilesystem()
  55 {
  56         if (manifest.get()) {
  57                 xml::Node::NodeList entries = manifest->evaluate("/manifest/filesystem/entry");
  58                 for (const xml::Node& entry : entries) {
  59                         bindFilesystemNode(entry.getProp("source"), entry.getProp("target"),
  60                                                            entry.getProp("type"), entry.getProp("options"));
  61                 }
  62         }
  63
  64         bindFilesystemNode("/home/" + name,
  65                                            "/home/" + name + "/.krate/" + name,
  66                                            "none", "rw,bind");
  67
  68         bindFilesystemNode("/home/" + name + "/.krate", "/home",
  69                                            "none", "rw,rbind");
  70 }