xpcom/io/nsLocalFileUnix.h
author Tim Huang <tihuang@mozilla.com>
Tue, 12 Dec 2017 15:25:49 -0600
changeset 398586 9c586454144b4eef9e9a8ab53e3d1a8c3f84ac3c
parent 373107 b34cf908546b9f37f5d1b100e67dc8ef814fca7a
child 401775 d7c27819bb205985798645ebecc7bd1ca4d5338e
permissions -rw-r--r--
Bug 1404608 - Reveal the real operating system when fingerprinting resistance is enabled. r=arthuredelstein,smaug This patch makes Firefox not to lie about the real operating system when pref 'privacy.resistFingerprinting' is true. This will also change the testcase as well. MozReview-Commit-ID: Gdnp2lMU3wr

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
 * Implementation of nsIFile for ``Unixy'' systems.
 */

#ifndef _nsLocalFileUNIX_H_
#define _nsLocalFileUNIX_H_

#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

#include "nscore.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsIHashable.h"
#include "nsIClassInfoImpl.h"
#include "mozilla/Attributes.h"
#ifdef MOZ_WIDGET_COCOA
#include "nsILocalFileMac.h"
#endif

/**
 *  we need these for statfs()
 */
#ifdef HAVE_SYS_STATVFS_H
  #if defined(__osf__) && defined(__DECCXX)
    extern "C" int statvfs(const char *, struct statvfs *);
  #endif
  #include <sys/statvfs.h>
#endif

#ifdef HAVE_SYS_STATFS_H
  #include <sys/statfs.h>
#endif

#ifdef HAVE_SYS_VFS_H
  #include <sys/vfs.h>
#endif

#ifdef HAVE_SYS_MOUNT_H
  #include <sys/param.h>
  #include <sys/mount.h>
#endif

#if defined(HAVE_STATVFS64) && (!defined(LINUX) && !defined(__osf__))
  #define STATFS statvfs64
  #define F_BSIZE f_frsize
#elif defined(HAVE_STATVFS) && (!defined(LINUX) && !defined(__osf__))
  #define STATFS statvfs
  #define F_BSIZE f_frsize
#elif defined(HAVE_STATFS64)
  #define STATFS statfs64
  #define F_BSIZE f_bsize
#elif defined(HAVE_STATFS)
  #define STATFS statfs
  #define F_BSIZE f_bsize
#endif

// stat64 and lstat64 are deprecated on OS X. Normal stat and lstat are
// 64-bit by default on OS X 10.6+.
#if defined(HAVE_STAT64) && defined(HAVE_LSTAT64) && !defined(XP_DARWIN)
  #if defined (AIX)
    #if defined STAT
      #undef STAT
    #endif
  #endif
  #define STAT stat64
  #define LSTAT lstat64
  #define HAVE_STATS64 1
#else
  #define STAT stat
  #define LSTAT lstat
#endif


class nsLocalFile final
#ifdef MOZ_WIDGET_COCOA
  : public nsILocalFileMac
#else
  : public nsIFile
#endif
  , public nsIHashable
{
public:
  NS_DEFINE_STATIC_CID_ACCESSOR(NS_LOCAL_FILE_CID)

  nsLocalFile();

  static nsresult nsLocalFileConstructor(nsISupports* aOuter,
                                         const nsIID& aIID,
                                         void** aInstancePtr);

  NS_DECL_THREADSAFE_ISUPPORTS
  NS_DECL_NSIFILE
#ifdef MOZ_WIDGET_COCOA
  NS_DECL_NSILOCALFILEMAC
#endif
  NS_DECL_NSIHASHABLE

public:
  static void GlobalInit();
  static void GlobalShutdown();

private:
  nsLocalFile(const nsLocalFile& aOther);
  ~nsLocalFile()
  {
  }

protected:
  // This stat cache holds the *last stat* - it does not invalidate.
  // Call "FillStatCache" whenever you want to stat our file.
  struct STAT  mCachedStat;
  nsCString    mPath;

  void LocateNativeLeafName(nsACString::const_iterator&,
                            nsACString::const_iterator&);

  nsresult CopyDirectoryTo(nsIFile* aNewParent);
  nsresult CreateAllAncestors(uint32_t aPermissions);
  nsresult GetNativeTargetPathName(nsIFile* aNewParent,
                                   const nsACString& aNewName,
                                   nsACString& aResult);

  bool FillStatCache();

  nsresult CreateAndKeepOpen(uint32_t aType, int aFlags,
                             uint32_t aPermissions, PRFileDesc** aResult);
};

#endif /* _nsLocalFileUNIX_H_ */