Rename mount

native_client_sdk/src/libraries/nacl_mounts/mount_dev.cc

-/* Copyright (c) 2012 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.
- */
-#if defined(WIN32)
-#define _CRT_RAND_S
-#endif
-
-#include <errno.h>
-#include <fcntl.h>
-#include <string.h>
-#include "nacl_mounts/mount_dev.h"
-#include "nacl_mounts/mount_node.h"
-#include "nacl_mounts/mount_node_dir.h"
-#include "nacl_mounts/pepper_interface.h"
-#include "utils/auto_lock.h"
-
-#if defined(__native_client__)
-#  include <irt.h>
-#elif defined(WIN32)
-#  include <stdlib.h>
-#endif
-
-namespace {
-
-void ReleaseAndNullNode(MountNode** node) {
-  if (*node)
-    (*node)->Release();
-  *node = NULL;
-}
-
-class NullNode : public MountNode {
- public:
-  explicit NullNode(Mount* mount);
-
-  virtual int Read(size_t offs, void* buf, size_t count);
-  virtual int Write(size_t offs, const void* buf, size_t count);
-};
-
-class ConsoleNode : public NullNode {
- public:
-  ConsoleNode(Mount* mount, PP_LogLevel level);
-
-  virtual int Write(size_t offs, const void* buf, size_t count);
-
-private:
-  PP_LogLevel level_;
-};
-
-
-class TtyNode : public NullNode {
- public:
-  explicit TtyNode(Mount* mount);
-
-  virtual int Write(size_t offs, const void* buf, size_t count);
-};
-
-
-class ZeroNode : public MountNode {
- public:
-  explicit ZeroNode(Mount* mount);
-
-  virtual int Read(size_t offs, void* buf, size_t count);
-  virtual int Write(size_t offs, const void* buf, size_t count);
-};
-
-class UrandomNode : public MountNode {
- public:
-  explicit UrandomNode(Mount* mount);
-
-  virtual int Read(size_t offs, void* buf, size_t count);
-  virtual int Write(size_t offs, const void* buf, size_t count);
-
- private:
-#if defined(__native_client__)
-  nacl_irt_random random_interface_;
-  bool interface_ok_;
-#endif
-};
-
-NullNode::NullNode(Mount* mount)
-    : MountNode(mount) {
-  stat_.st_mode = S_IFCHR;
-}
-
-int NullNode::Read(size_t offs, void* buf, size_t count) {
-  return 0;
-}
-
-int NullNode::Write(size_t offs, const void* buf, size_t count) {
-  return count;
-}
-
-ConsoleNode::ConsoleNode(Mount* mount, PP_LogLevel level)
-    : NullNode(mount),
-    level_(level) {
-  stat_.st_mode = S_IFCHR;
-}
-
-int ConsoleNode::Write(size_t offs, const void* buf, size_t count) {
-  ConsoleInterface* con_intr = mount_->ppapi()->GetConsoleInterface();
-  VarInterface* var_intr = mount_->ppapi()->GetVarInterface();
-
-  if (var_intr && con_intr) {
-    const char* data = static_cast<const char *>(buf);
-    uint32_t len = static_cast<uint32_t>(count);
-    struct PP_Var val = var_intr->VarFromUtf8(data, len);
-    con_intr->Log(mount_->ppapi()->GetInstance(), level_, val);
-    return count;
-  }
-  return 0;
-}
-
-
-TtyNode::TtyNode(Mount* mount)
-    : NullNode(mount) {
-}
-
-int TtyNode::Write(size_t offs, const void* buf, size_t count) {
-  MessagingInterface* msg_intr = mount_->ppapi()->GetMessagingInterface();
-  VarInterface* var_intr = mount_->ppapi()->GetVarInterface();
-
-  if (var_intr && msg_intr) {
-    const char* data = static_cast<const char *>(buf);
-    uint32_t len = static_cast<uint32_t>(count);
-    struct PP_Var val = var_intr->VarFromUtf8(data, len);
-    msg_intr->PostMessage(mount_->ppapi()->GetInstance(), val);
-    return count;
-  }
-  return 0;
-}
-
-
-ZeroNode::ZeroNode(Mount* mount)
-    : MountNode(mount) {
-  stat_.st_mode = S_IFCHR;
-}
-
-int ZeroNode::Read(size_t offs, void* buf, size_t count) {
-  memset(buf, 0, count);
-  return count;
-}
-
-int ZeroNode::Write(size_t offs, const void* buf, size_t count) {
-  return count;
-}
-
-UrandomNode::UrandomNode(Mount* mount)
-    : MountNode(mount) {
-  stat_.st_mode = S_IFCHR;
-#if defined(__native_client__)
-  size_t result = nacl_interface_query(NACL_IRT_RANDOM_v0_1, &random_interface_,
-                                       sizeof(random_interface_));
-  interface_ok_ = result != 0;
-#endif
-}
-
-int UrandomNode::Read(size_t offs, void* buf, size_t count) {
-#if defined(__native_client__)
-  if (interface_ok_) {
-    size_t nread;
-    int result = (*random_interface_.get_random_bytes)(buf, count, &nread);
-    if (result != 0) {
-      errno = result;
-      return 0;
-    }
-
-    return count;
-  }
-
-  errno = EBADF;
-  return 0;
-#elif defined(WIN32)
-  char* out = static_cast<char*>(buf);
-  size_t bytes_left = count;
-  while (bytes_left) {
-    unsigned int random_int;
-    errno_t err = rand_s(&random_int);
-    if (err) {
-      errno = err;
-      return count - bytes_left;
-    }
-
-    int bytes_to_copy = std::min(bytes_left, sizeof(random_int));
-    memcpy(out, &random_int, bytes_to_copy);
-    out += bytes_to_copy;
-    bytes_left -= bytes_to_copy;
-  }
-
-  return count;
-#endif
-}
-
-int UrandomNode::Write(size_t offs, const void* buf, size_t count) {
-  return count;
-}
-
-
-
-}  // namespace
-
-MountNode *MountDev::Open(const Path& path, int mode) {
-  AutoLock lock(&lock_);
-
-  // Don't allow creating any files.
-  if (mode & O_CREAT)
-    return NULL;
-
-  MountNode* node = root_->FindChild(path.Join());
-  if (node)
-    node->Acquire();
-  return node;
-}
-
-int MountDev::Unlink(const Path& path) {
-  errno = EINVAL;
-  return -1;
-}
-
-int MountDev::Mkdir(const Path& path, int permissions) {
-  errno = EINVAL;
-  return -1;
-}
-
-int MountDev::Rmdir(const Path& path) {
-  errno = EINVAL;
-  return -1;
-}
-
-int MountDev::Remove(const Path& path) {
-  errno = EINVAL;
-  return -1;
-}
-
-MountDev::MountDev()
-    : null_node_(NULL),
-      zero_node_(NULL),
-      random_node_(NULL),
-      console0_node_(NULL),
-      console1_node_(NULL),
-      console2_node_(NULL),
-      console3_node_(NULL),
-      tty_node_(NULL) {
-}
-
-bool MountDev::Init(int dev, StringMap_t& args, PepperInterface* ppapi) {
-  if (!Mount::Init(dev, args, ppapi))
-    return false;
-
-  root_ = new MountNodeDir(this);
-  null_node_ = new NullNode(this);
-  root_->AddChild("/null", null_node_);
-  zero_node_ = new ZeroNode(this);
-  root_->AddChild("/zero", zero_node_);
-  random_node_ = new UrandomNode(this);
-  root_->AddChild("/urandom", random_node_);
-
-  console0_node_ = new ConsoleNode(this, PP_LOGLEVEL_TIP);
-  root_->AddChild("/console0", console0_node_);
-  console1_node_ = new ConsoleNode(this, PP_LOGLEVEL_LOG);
-  root_->AddChild("/console1", console1_node_);
-  console2_node_ = new ConsoleNode(this, PP_LOGLEVEL_WARNING);
-  root_->AddChild("/console2", console2_node_);
-  console3_node_ = new ConsoleNode(this, PP_LOGLEVEL_ERROR);
-  root_->AddChild("/console3", console3_node_);
-
-  tty_node_ = new TtyNode(this);
-  root_->AddChild("/tty", tty_node_);
-  return true;
-}
-
-void MountDev::Destroy() {
-  ReleaseAndNullNode(&tty_node_);
-  ReleaseAndNullNode(&console3_node_);
-  ReleaseAndNullNode(&console2_node_);
-  ReleaseAndNullNode(&console1_node_);
-  ReleaseAndNullNode(&console0_node_);
-  ReleaseAndNullNode(&random_node_);
-  ReleaseAndNullNode(&zero_node_);
-  ReleaseAndNullNode(&null_node_);
-  ReleaseAndNullNode(&root_);
-}