575 lines
17 KiB
C++
575 lines
17 KiB
C++
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/*
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* Copyright 2004 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/base/unixfilesystem.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
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#include <Carbon/Carbon.h>
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#include <IOKit/IOCFBundle.h>
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#include <sys/statvfs.h>
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#include "webrtc/base/macutils.h"
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#endif // WEBRTC_MAC && !defined(WEBRTC_IOS)
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#if defined(WEBRTC_POSIX) && !defined(WEBRTC_MAC) || defined(WEBRTC_IOS)
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#include <sys/types.h>
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#if defined(WEBRTC_ANDROID)
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#include <sys/statfs.h>
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#elif !defined(__native_client__)
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#include <sys/statvfs.h>
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#endif // !defined(__native_client__)
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#include <limits.h>
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#include <pwd.h>
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#include <stdio.h>
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#endif // WEBRTC_POSIX && !WEBRTC_MAC || WEBRTC_IOS
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#if defined(WEBRTC_LINUX) && !defined(WEBRTC_ANDROID)
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#include <ctype.h>
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#include <algorithm>
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#endif
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#if defined(__native_client__) && !defined(__GLIBC__)
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#include <sys/syslimits.h>
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#endif
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#include "webrtc/base/arraysize.h"
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#include "webrtc/base/fileutils.h"
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#include "webrtc/base/pathutils.h"
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#include "webrtc/base/stream.h"
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#include "webrtc/base/stringutils.h"
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#if defined(WEBRTC_IOS)
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// Defined in iosfilesystem.mm. No header file to discourage use
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// elsewhere; other places should use GetApp{Data,Temp}Folder() in
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// this file. Don't copy/paste. I mean it.
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char* IOSDataDirectory();
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char* IOSTempDirectory();
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void IOSAppName(rtc::Pathname* path);
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#endif
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namespace rtc {
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#if !defined(WEBRTC_ANDROID) && !defined(WEBRTC_IOS)
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char* UnixFilesystem::app_temp_path_ = NULL;
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#else
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char* UnixFilesystem::provided_app_data_folder_ = NULL;
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char* UnixFilesystem::provided_app_temp_folder_ = NULL;
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void UnixFilesystem::SetAppDataFolder(const std::string& folder) {
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delete [] provided_app_data_folder_;
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provided_app_data_folder_ = CopyString(folder);
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}
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void UnixFilesystem::SetAppTempFolder(const std::string& folder) {
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delete [] provided_app_temp_folder_;
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provided_app_temp_folder_ = CopyString(folder);
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}
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#endif
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UnixFilesystem::UnixFilesystem() {
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#if defined(WEBRTC_IOS)
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if (!provided_app_data_folder_)
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provided_app_data_folder_ = IOSDataDirectory();
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if (!provided_app_temp_folder_)
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provided_app_temp_folder_ = IOSTempDirectory();
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#endif
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}
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UnixFilesystem::~UnixFilesystem() {}
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bool UnixFilesystem::CreateFolder(const Pathname &path, mode_t mode) {
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std::string pathname(path.pathname());
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int len = pathname.length();
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if ((len == 0) || (pathname[len - 1] != '/'))
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return false;
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struct stat st;
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int res = ::stat(pathname.c_str(), &st);
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if (res == 0) {
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// Something exists at this location, check if it is a directory
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return S_ISDIR(st.st_mode) != 0;
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} else if (errno != ENOENT) {
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// Unexpected error
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return false;
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}
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// Directory doesn't exist, look up one directory level
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do {
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--len;
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} while ((len > 0) && (pathname[len - 1] != '/'));
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if (!CreateFolder(Pathname(pathname.substr(0, len)), mode)) {
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return false;
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}
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LOG(LS_INFO) << "Creating folder: " << pathname;
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return (0 == ::mkdir(pathname.c_str(), mode));
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}
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bool UnixFilesystem::CreateFolder(const Pathname &path) {
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return CreateFolder(path, 0755);
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}
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FileStream *UnixFilesystem::OpenFile(const Pathname &filename,
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const std::string &mode) {
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FileStream *fs = new FileStream();
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if (fs && !fs->Open(filename.pathname().c_str(), mode.c_str(), NULL)) {
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delete fs;
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fs = NULL;
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}
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return fs;
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}
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bool UnixFilesystem::CreatePrivateFile(const Pathname &filename) {
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int fd = open(filename.pathname().c_str(),
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O_RDWR | O_CREAT | O_EXCL,
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S_IRUSR | S_IWUSR);
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if (fd < 0) {
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LOG_ERR(LS_ERROR) << "open() failed.";
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return false;
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}
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// Don't need to keep the file descriptor.
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if (close(fd) < 0) {
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LOG_ERR(LS_ERROR) << "close() failed.";
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// Continue.
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}
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return true;
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}
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bool UnixFilesystem::DeleteFile(const Pathname &filename) {
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LOG(LS_INFO) << "Deleting file:" << filename.pathname();
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if (!IsFile(filename)) {
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ASSERT(IsFile(filename));
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return false;
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}
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return ::unlink(filename.pathname().c_str()) == 0;
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}
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bool UnixFilesystem::DeleteEmptyFolder(const Pathname &folder) {
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LOG(LS_INFO) << "Deleting folder" << folder.pathname();
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if (!IsFolder(folder)) {
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ASSERT(IsFolder(folder));
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return false;
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}
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std::string no_slash(folder.pathname(), 0, folder.pathname().length()-1);
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return ::rmdir(no_slash.c_str()) == 0;
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}
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bool UnixFilesystem::GetTemporaryFolder(Pathname &pathname, bool create,
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const std::string *append) {
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#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
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FSRef fr;
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if (0 != FSFindFolder(kOnAppropriateDisk, kTemporaryFolderType,
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kCreateFolder, &fr))
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return false;
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unsigned char buffer[NAME_MAX+1];
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if (0 != FSRefMakePath(&fr, buffer, arraysize(buffer)))
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return false;
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pathname.SetPathname(reinterpret_cast<char*>(buffer), "");
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#elif defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS)
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ASSERT(provided_app_temp_folder_ != NULL);
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pathname.SetPathname(provided_app_temp_folder_, "");
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#else // !WEBRTC_MAC || WEBRTC_IOS && !WEBRTC_ANDROID
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if (const char* tmpdir = getenv("TMPDIR")) {
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pathname.SetPathname(tmpdir, "");
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} else if (const char* tmp = getenv("TMP")) {
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pathname.SetPathname(tmp, "");
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} else {
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#ifdef P_tmpdir
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pathname.SetPathname(P_tmpdir, "");
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#else // !P_tmpdir
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pathname.SetPathname("/tmp/", "");
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#endif // !P_tmpdir
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}
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#endif // !WEBRTC_MAC || WEBRTC_IOS && !WEBRTC_ANDROID
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if (append) {
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ASSERT(!append->empty());
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pathname.AppendFolder(*append);
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}
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return !create || CreateFolder(pathname);
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}
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std::string UnixFilesystem::TempFilename(const Pathname &dir,
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const std::string &prefix) {
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int len = dir.pathname().size() + prefix.size() + 2 + 6;
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char *tempname = new char[len];
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snprintf(tempname, len, "%s/%sXXXXXX", dir.pathname().c_str(),
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prefix.c_str());
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int fd = ::mkstemp(tempname);
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if (fd != -1)
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::close(fd);
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std::string ret(tempname);
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delete[] tempname;
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return ret;
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}
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bool UnixFilesystem::MoveFile(const Pathname &old_path,
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const Pathname &new_path) {
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if (!IsFile(old_path)) {
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ASSERT(IsFile(old_path));
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return false;
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}
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LOG(LS_VERBOSE) << "Moving " << old_path.pathname()
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<< " to " << new_path.pathname();
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if (rename(old_path.pathname().c_str(), new_path.pathname().c_str()) != 0) {
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if (errno != EXDEV)
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return false;
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if (!CopyFile(old_path, new_path))
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return false;
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if (!DeleteFile(old_path))
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return false;
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}
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return true;
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}
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bool UnixFilesystem::MoveFolder(const Pathname &old_path,
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const Pathname &new_path) {
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if (!IsFolder(old_path)) {
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ASSERT(IsFolder(old_path));
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return false;
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}
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LOG(LS_VERBOSE) << "Moving " << old_path.pathname()
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<< " to " << new_path.pathname();
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if (rename(old_path.pathname().c_str(), new_path.pathname().c_str()) != 0) {
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if (errno != EXDEV)
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return false;
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if (!CopyFolder(old_path, new_path))
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return false;
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if (!DeleteFolderAndContents(old_path))
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return false;
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}
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return true;
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}
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bool UnixFilesystem::IsFolder(const Pathname &path) {
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struct stat st;
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if (stat(path.pathname().c_str(), &st) < 0)
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return false;
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return S_ISDIR(st.st_mode);
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}
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bool UnixFilesystem::CopyFile(const Pathname &old_path,
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const Pathname &new_path) {
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LOG(LS_VERBOSE) << "Copying " << old_path.pathname()
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<< " to " << new_path.pathname();
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char buf[256];
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size_t len;
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StreamInterface *source = OpenFile(old_path, "rb");
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if (!source)
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return false;
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StreamInterface *dest = OpenFile(new_path, "wb");
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if (!dest) {
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delete source;
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return false;
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}
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while (source->Read(buf, sizeof(buf), &len, NULL) == SR_SUCCESS)
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dest->Write(buf, len, NULL, NULL);
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delete source;
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delete dest;
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return true;
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}
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bool UnixFilesystem::IsTemporaryPath(const Pathname& pathname) {
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#if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS)
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ASSERT(provided_app_temp_folder_ != NULL);
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#endif
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const char* const kTempPrefixes[] = {
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#if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS)
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provided_app_temp_folder_,
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#else
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"/tmp/", "/var/tmp/",
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#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
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"/private/tmp/", "/private/var/tmp/", "/private/var/folders/",
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#endif // WEBRTC_MAC && !defined(WEBRTC_IOS)
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#endif // WEBRTC_ANDROID || WEBRTC_IOS
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};
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for (size_t i = 0; i < arraysize(kTempPrefixes); ++i) {
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if (0 == strncmp(pathname.pathname().c_str(), kTempPrefixes[i],
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strlen(kTempPrefixes[i])))
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return true;
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}
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return false;
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}
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bool UnixFilesystem::IsFile(const Pathname& pathname) {
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struct stat st;
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int res = ::stat(pathname.pathname().c_str(), &st);
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// Treat symlinks, named pipes, etc. all as files.
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return res == 0 && !S_ISDIR(st.st_mode);
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}
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bool UnixFilesystem::IsAbsent(const Pathname& pathname) {
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struct stat st;
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int res = ::stat(pathname.pathname().c_str(), &st);
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// Note: we specifically maintain ENOTDIR as an error, because that implies
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// that you could not call CreateFolder(pathname).
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return res != 0 && ENOENT == errno;
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}
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bool UnixFilesystem::GetFileSize(const Pathname& pathname, size_t *size) {
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struct stat st;
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if (::stat(pathname.pathname().c_str(), &st) != 0)
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return false;
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*size = st.st_size;
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return true;
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}
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bool UnixFilesystem::GetFileTime(const Pathname& path, FileTimeType which,
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time_t* time) {
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struct stat st;
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if (::stat(path.pathname().c_str(), &st) != 0)
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return false;
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switch (which) {
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case FTT_CREATED:
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*time = st.st_ctime;
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break;
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case FTT_MODIFIED:
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*time = st.st_mtime;
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break;
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case FTT_ACCESSED:
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*time = st.st_atime;
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break;
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default:
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return false;
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}
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return true;
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}
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bool UnixFilesystem::GetAppPathname(Pathname* path) {
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#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
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ProcessSerialNumber psn = { 0, kCurrentProcess };
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CFDictionaryRef procinfo = ProcessInformationCopyDictionary(&psn,
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kProcessDictionaryIncludeAllInformationMask);
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if (NULL == procinfo)
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||
|
|
return false;
|
||
|
|
CFStringRef cfpath = (CFStringRef) CFDictionaryGetValue(procinfo,
|
||
|
|
kIOBundleExecutableKey);
|
||
|
|
std::string path8;
|
||
|
|
bool success = ToUtf8(cfpath, &path8);
|
||
|
|
CFRelease(procinfo);
|
||
|
|
if (success)
|
||
|
|
path->SetPathname(path8);
|
||
|
|
return success;
|
||
|
|
#elif defined(__native_client__)
|
||
|
|
return false;
|
||
|
|
#elif WEBRTC_IOS
|
||
|
|
IOSAppName(path);
|
||
|
|
return true;
|
||
|
|
#else // WEBRTC_MAC && !defined(WEBRTC_IOS)
|
||
|
|
char buffer[PATH_MAX + 2];
|
||
|
|
ssize_t len = readlink("/proc/self/exe", buffer, arraysize(buffer) - 1);
|
||
|
|
if ((len <= 0) || (len == PATH_MAX + 1))
|
||
|
|
return false;
|
||
|
|
buffer[len] = '\0';
|
||
|
|
path->SetPathname(buffer);
|
||
|
|
return true;
|
||
|
|
#endif // WEBRTC_MAC && !defined(WEBRTC_IOS)
|
||
|
|
}
|
||
|
|
|
||
|
|
bool UnixFilesystem::GetAppDataFolder(Pathname* path, bool per_user) {
|
||
|
|
ASSERT(!organization_name_.empty());
|
||
|
|
ASSERT(!application_name_.empty());
|
||
|
|
|
||
|
|
// First get the base directory for app data.
|
||
|
|
#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
|
||
|
|
if (per_user) {
|
||
|
|
// Use ~/Library/Application Support/<orgname>/<appname>/
|
||
|
|
FSRef fr;
|
||
|
|
if (0 != FSFindFolder(kUserDomain, kApplicationSupportFolderType,
|
||
|
|
kCreateFolder, &fr))
|
||
|
|
return false;
|
||
|
|
unsigned char buffer[NAME_MAX+1];
|
||
|
|
if (0 != FSRefMakePath(&fr, buffer, arraysize(buffer)))
|
||
|
|
return false;
|
||
|
|
path->SetPathname(reinterpret_cast<char*>(buffer), "");
|
||
|
|
} else {
|
||
|
|
// TODO
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
#elif defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS) // && !WEBRTC_MAC || WEBRTC_IOS
|
||
|
|
ASSERT(provided_app_data_folder_ != NULL);
|
||
|
|
path->SetPathname(provided_app_data_folder_, "");
|
||
|
|
#elif defined(WEBRTC_LINUX) && !defined(WEBRTC_ANDROID) // && !WEBRTC_MAC && !WEBRTC_IOS && !WEBRTC_ANDROID
|
||
|
|
if (per_user) {
|
||
|
|
// We follow the recommendations in
|
||
|
|
// http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
|
||
|
|
// It specifies separate directories for data and config files, but
|
||
|
|
// GetAppDataFolder() does not distinguish. We just return the config dir
|
||
|
|
// path.
|
||
|
|
const char* xdg_config_home = getenv("XDG_CONFIG_HOME");
|
||
|
|
if (xdg_config_home) {
|
||
|
|
path->SetPathname(xdg_config_home, "");
|
||
|
|
} else {
|
||
|
|
// XDG says to default to $HOME/.config. We also support falling back to
|
||
|
|
// other synonyms for HOME if for some reason it is not defined.
|
||
|
|
const char* homedir;
|
||
|
|
if (const char* home = getenv("HOME")) {
|
||
|
|
homedir = home;
|
||
|
|
} else if (const char* dotdir = getenv("DOTDIR")) {
|
||
|
|
homedir = dotdir;
|
||
|
|
} else if (passwd* pw = getpwuid(geteuid())) {
|
||
|
|
homedir = pw->pw_dir;
|
||
|
|
} else {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
path->SetPathname(homedir, "");
|
||
|
|
path->AppendFolder(".config");
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
// XDG does not define a standard directory for writable global data. Let's
|
||
|
|
// just use this.
|
||
|
|
path->SetPathname("/var/cache/", "");
|
||
|
|
}
|
||
|
|
#endif // !WEBRTC_MAC && !WEBRTC_LINUX
|
||
|
|
|
||
|
|
// Now add on a sub-path for our app.
|
||
|
|
#if defined(WEBRTC_MAC) || defined(WEBRTC_ANDROID)
|
||
|
|
path->AppendFolder(organization_name_);
|
||
|
|
path->AppendFolder(application_name_);
|
||
|
|
#elif defined(WEBRTC_LINUX) && !defined(WEBRTC_ANDROID)
|
||
|
|
// XDG says to use a single directory level, so we concatenate the org and app
|
||
|
|
// name with a hyphen. We also do the Linuxy thing and convert to all
|
||
|
|
// lowercase with no spaces.
|
||
|
|
std::string subdir(organization_name_);
|
||
|
|
subdir.append("-");
|
||
|
|
subdir.append(application_name_);
|
||
|
|
replace_substrs(" ", 1, "", 0, &subdir);
|
||
|
|
std::transform(subdir.begin(), subdir.end(), subdir.begin(), ::tolower);
|
||
|
|
path->AppendFolder(subdir);
|
||
|
|
#endif
|
||
|
|
if (!CreateFolder(*path, 0700)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
#if !defined(__native_client__)
|
||
|
|
// If the folder already exists, it may have the wrong mode or be owned by
|
||
|
|
// someone else, both of which are security problems. Setting the mode
|
||
|
|
// avoids both issues since it will fail if the path is not owned by us.
|
||
|
|
if (0 != ::chmod(path->pathname().c_str(), 0700)) {
|
||
|
|
LOG_ERR(LS_ERROR) << "Can't set mode on " << path;
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool UnixFilesystem::GetAppTempFolder(Pathname* path) {
|
||
|
|
#if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS)
|
||
|
|
ASSERT(provided_app_temp_folder_ != NULL);
|
||
|
|
path->SetPathname(provided_app_temp_folder_);
|
||
|
|
return true;
|
||
|
|
#else
|
||
|
|
ASSERT(!application_name_.empty());
|
||
|
|
// TODO: Consider whether we are worried about thread safety.
|
||
|
|
if (app_temp_path_ != NULL && strlen(app_temp_path_) > 0) {
|
||
|
|
path->SetPathname(app_temp_path_);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Create a random directory as /tmp/<appname>-<pid>-<timestamp>
|
||
|
|
char buffer[128];
|
||
|
|
sprintfn(buffer, arraysize(buffer), "-%d-%d",
|
||
|
|
static_cast<int>(getpid()),
|
||
|
|
static_cast<int>(time(0)));
|
||
|
|
std::string folder(application_name_);
|
||
|
|
folder.append(buffer);
|
||
|
|
if (!GetTemporaryFolder(*path, true, &folder))
|
||
|
|
return false;
|
||
|
|
|
||
|
|
delete [] app_temp_path_;
|
||
|
|
app_temp_path_ = CopyString(path->pathname());
|
||
|
|
// TODO: atexit(DeleteFolderAndContents(app_temp_path_));
|
||
|
|
return true;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
bool UnixFilesystem::GetDiskFreeSpace(const Pathname& path,
|
||
|
|
int64_t* freebytes) {
|
||
|
|
#ifdef __native_client__
|
||
|
|
return false;
|
||
|
|
#else // __native_client__
|
||
|
|
ASSERT(NULL != freebytes);
|
||
|
|
// TODO: Consider making relative paths absolute using cwd.
|
||
|
|
// TODO: When popping off a symlink, push back on the components of the
|
||
|
|
// symlink, so we don't jump out of the target disk inadvertently.
|
||
|
|
Pathname existing_path(path.folder(), "");
|
||
|
|
while (!existing_path.folder().empty() && IsAbsent(existing_path)) {
|
||
|
|
existing_path.SetFolder(existing_path.parent_folder());
|
||
|
|
}
|
||
|
|
#if defined(WEBRTC_ANDROID)
|
||
|
|
struct statfs vfs;
|
||
|
|
memset(&vfs, 0, sizeof(vfs));
|
||
|
|
if (0 != statfs(existing_path.pathname().c_str(), &vfs))
|
||
|
|
return false;
|
||
|
|
#else
|
||
|
|
struct statvfs vfs;
|
||
|
|
memset(&vfs, 0, sizeof(vfs));
|
||
|
|
if (0 != statvfs(existing_path.pathname().c_str(), &vfs))
|
||
|
|
return false;
|
||
|
|
#endif // WEBRTC_ANDROID
|
||
|
|
#if defined(WEBRTC_LINUX)
|
||
|
|
*freebytes = static_cast<int64_t>(vfs.f_bsize) * vfs.f_bavail;
|
||
|
|
#elif defined(WEBRTC_MAC)
|
||
|
|
*freebytes = static_cast<int64_t>(vfs.f_frsize) * vfs.f_bavail;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return true;
|
||
|
|
#endif // !__native_client__
|
||
|
|
}
|
||
|
|
|
||
|
|
Pathname UnixFilesystem::GetCurrentDirectory() {
|
||
|
|
Pathname cwd;
|
||
|
|
char buffer[PATH_MAX];
|
||
|
|
char *path = getcwd(buffer, PATH_MAX);
|
||
|
|
|
||
|
|
if (!path) {
|
||
|
|
LOG_ERR(LS_ERROR) << "getcwd() failed";
|
||
|
|
return cwd; // returns empty pathname
|
||
|
|
}
|
||
|
|
cwd.SetFolder(std::string(path));
|
||
|
|
|
||
|
|
return cwd;
|
||
|
|
}
|
||
|
|
|
||
|
|
char* UnixFilesystem::CopyString(const std::string& str) {
|
||
|
|
size_t size = str.length() + 1;
|
||
|
|
|
||
|
|
char* buf = new char[size];
|
||
|
|
if (!buf) {
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
strcpyn(buf, size, str.c_str());
|
||
|
|
return buf;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace rtc
|
||
|
|
|
||
|
|
#if defined(__native_client__)
|
||
|
|
extern "C" int __attribute__((weak))
|
||
|
|
link(const char* oldpath, const char* newpath) {
|
||
|
|
errno = EACCES;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
#endif
|