| /* |
| * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "webrtc/base/unixfilesystem.h" |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <stdlib.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| |
| #if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS) |
| #include <CoreServices/CoreServices.h> |
| #include <IOKit/IOCFBundle.h> |
| #include <sys/statvfs.h> |
| #include "webrtc/base/macutils.h" |
| #endif // WEBRTC_MAC && !defined(WEBRTC_IOS) |
| |
| #if defined(WEBRTC_POSIX) && !defined(WEBRTC_MAC) || defined(WEBRTC_IOS) |
| #include <sys/types.h> |
| #if defined(WEBRTC_ANDROID) |
| #include <sys/statfs.h> |
| #elif !defined(__native_client__) |
| #include <sys/statvfs.h> |
| #endif // !defined(__native_client__) |
| #include <limits.h> |
| #include <pwd.h> |
| #include <stdio.h> |
| #endif // WEBRTC_POSIX && !WEBRTC_MAC || WEBRTC_IOS |
| |
| #if defined(WEBRTC_LINUX) && !defined(WEBRTC_ANDROID) |
| #include <ctype.h> |
| #include <algorithm> |
| #endif |
| |
| #if defined(__native_client__) && !defined(__GLIBC__) |
| #include <sys/syslimits.h> |
| #endif |
| |
| #include "webrtc/base/arraysize.h" |
| #include "webrtc/base/fileutils.h" |
| #include "webrtc/base/pathutils.h" |
| #include "webrtc/base/stream.h" |
| #include "webrtc/base/stringutils.h" |
| |
| #if defined(WEBRTC_MAC) |
| // Defined in applefilesystem.mm. No header file to discourage use |
| // elsewhere; other places should use GetApp{Data,Temp}Folder() in |
| // this file. Don't copy/paste. I mean it. |
| char* AppleDataDirectory(); |
| char* AppleTempDirectory(); |
| void AppleAppName(rtc::Pathname* path); |
| #endif |
| |
| namespace rtc { |
| |
| #if !defined(WEBRTC_ANDROID) && !defined(WEBRTC_IOS) |
| char* UnixFilesystem::app_temp_path_ = NULL; |
| #else |
| char* UnixFilesystem::provided_app_data_folder_ = NULL; |
| char* UnixFilesystem::provided_app_temp_folder_ = NULL; |
| |
| void UnixFilesystem::SetAppDataFolder(const std::string& folder) { |
| delete [] provided_app_data_folder_; |
| provided_app_data_folder_ = CopyString(folder); |
| } |
| |
| void UnixFilesystem::SetAppTempFolder(const std::string& folder) { |
| delete [] provided_app_temp_folder_; |
| provided_app_temp_folder_ = CopyString(folder); |
| } |
| #endif |
| |
| UnixFilesystem::UnixFilesystem() { |
| #if defined(WEBRTC_IOS) |
| if (!provided_app_data_folder_) |
| provided_app_data_folder_ = AppleDataDirectory(); |
| if (!provided_app_temp_folder_) |
| provided_app_temp_folder_ = AppleTempDirectory(); |
| #endif |
| } |
| |
| UnixFilesystem::~UnixFilesystem() {} |
| |
| bool UnixFilesystem::CreateFolder(const Pathname &path, mode_t mode) { |
| std::string pathname(path.pathname()); |
| int len = pathname.length(); |
| if ((len == 0) || (pathname[len - 1] != '/')) |
| return false; |
| |
| struct stat st; |
| int res = ::stat(pathname.c_str(), &st); |
| if (res == 0) { |
| // Something exists at this location, check if it is a directory |
| return S_ISDIR(st.st_mode) != 0; |
| } else if (errno != ENOENT) { |
| // Unexpected error |
| return false; |
| } |
| |
| // Directory doesn't exist, look up one directory level |
| do { |
| --len; |
| } while ((len > 0) && (pathname[len - 1] != '/')); |
| |
| if (!CreateFolder(Pathname(pathname.substr(0, len)), mode)) { |
| return false; |
| } |
| |
| LOG(LS_INFO) << "Creating folder: " << pathname; |
| return (0 == ::mkdir(pathname.c_str(), mode)); |
| } |
| |
| bool UnixFilesystem::CreateFolder(const Pathname &path) { |
| return CreateFolder(path, 0755); |
| } |
| |
| FileStream *UnixFilesystem::OpenFile(const Pathname &filename, |
| const std::string &mode) { |
| FileStream *fs = new FileStream(); |
| if (fs && !fs->Open(filename.pathname().c_str(), mode.c_str(), NULL)) { |
| delete fs; |
| fs = NULL; |
| } |
| return fs; |
| } |
| |
| bool UnixFilesystem::CreatePrivateFile(const Pathname &filename) { |
| int fd = open(filename.pathname().c_str(), |
| O_RDWR | O_CREAT | O_EXCL, |
| S_IRUSR | S_IWUSR); |
| if (fd < 0) { |
| LOG_ERR(LS_ERROR) << "open() failed."; |
| return false; |
| } |
| // Don't need to keep the file descriptor. |
| if (close(fd) < 0) { |
| LOG_ERR(LS_ERROR) << "close() failed."; |
| // Continue. |
| } |
| return true; |
| } |
| |
| bool UnixFilesystem::DeleteFile(const Pathname &filename) { |
| LOG(LS_INFO) << "Deleting file:" << filename.pathname(); |
| |
| if (!IsFile(filename)) { |
| ASSERT(IsFile(filename)); |
| return false; |
| } |
| return ::unlink(filename.pathname().c_str()) == 0; |
| } |
| |
| bool UnixFilesystem::DeleteEmptyFolder(const Pathname &folder) { |
| LOG(LS_INFO) << "Deleting folder" << folder.pathname(); |
| |
| if (!IsFolder(folder)) { |
| ASSERT(IsFolder(folder)); |
| return false; |
| } |
| std::string no_slash(folder.pathname(), 0, folder.pathname().length()-1); |
| return ::rmdir(no_slash.c_str()) == 0; |
| } |
| |
| bool UnixFilesystem::GetTemporaryFolder(Pathname &pathname, bool create, |
| const std::string *append) { |
| #if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS) |
| ASSERT(provided_app_temp_folder_ != NULL); |
| pathname.SetPathname(provided_app_temp_folder_, ""); |
| #else |
| if (const char* tmpdir = getenv("TMPDIR")) { |
| pathname.SetPathname(tmpdir, ""); |
| } else if (const char* tmp = getenv("TMP")) { |
| pathname.SetPathname(tmp, ""); |
| } else { |
| #ifdef P_tmpdir |
| pathname.SetPathname(P_tmpdir, ""); |
| #else // !P_tmpdir |
| pathname.SetPathname("/tmp/", ""); |
| #endif // !P_tmpdir |
| } |
| #endif // defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS) |
| if (append) { |
| ASSERT(!append->empty()); |
| pathname.AppendFolder(*append); |
| } |
| return !create || CreateFolder(pathname); |
| } |
| |
| std::string UnixFilesystem::TempFilename(const Pathname &dir, |
| const std::string &prefix) { |
| int len = dir.pathname().size() + prefix.size() + 2 + 6; |
| char *tempname = new char[len]; |
| |
| snprintf(tempname, len, "%s/%sXXXXXX", dir.pathname().c_str(), |
| prefix.c_str()); |
| int fd = ::mkstemp(tempname); |
| if (fd != -1) |
| ::close(fd); |
| std::string ret(tempname); |
| delete[] tempname; |
| |
| return ret; |
| } |
| |
| bool UnixFilesystem::MoveFile(const Pathname &old_path, |
| const Pathname &new_path) { |
| if (!IsFile(old_path)) { |
| ASSERT(IsFile(old_path)); |
| return false; |
| } |
| LOG(LS_VERBOSE) << "Moving " << old_path.pathname() |
| << " to " << new_path.pathname(); |
| if (rename(old_path.pathname().c_str(), new_path.pathname().c_str()) != 0) { |
| if (errno != EXDEV) |
| return false; |
| if (!CopyFile(old_path, new_path)) |
| return false; |
| if (!DeleteFile(old_path)) |
| return false; |
| } |
| return true; |
| } |
| |
| bool UnixFilesystem::MoveFolder(const Pathname &old_path, |
| const Pathname &new_path) { |
| if (!IsFolder(old_path)) { |
| ASSERT(IsFolder(old_path)); |
| return false; |
| } |
| LOG(LS_VERBOSE) << "Moving " << old_path.pathname() |
| << " to " << new_path.pathname(); |
| if (rename(old_path.pathname().c_str(), new_path.pathname().c_str()) != 0) { |
| if (errno != EXDEV) |
| return false; |
| if (!CopyFolder(old_path, new_path)) |
| return false; |
| if (!DeleteFolderAndContents(old_path)) |
| return false; |
| } |
| return true; |
| } |
| |
| bool UnixFilesystem::IsFolder(const Pathname &path) { |
| struct stat st; |
| if (stat(path.pathname().c_str(), &st) < 0) |
| return false; |
| return S_ISDIR(st.st_mode); |
| } |
| |
| bool UnixFilesystem::CopyFile(const Pathname &old_path, |
| const Pathname &new_path) { |
| LOG(LS_VERBOSE) << "Copying " << old_path.pathname() |
| << " to " << new_path.pathname(); |
| char buf[256]; |
| size_t len; |
| |
| StreamInterface *source = OpenFile(old_path, "rb"); |
| if (!source) |
| return false; |
| |
| StreamInterface *dest = OpenFile(new_path, "wb"); |
| if (!dest) { |
| delete source; |
| return false; |
| } |
| |
| while (source->Read(buf, sizeof(buf), &len, NULL) == SR_SUCCESS) |
| dest->Write(buf, len, NULL, NULL); |
| |
| delete source; |
| delete dest; |
| return true; |
| } |
| |
| bool UnixFilesystem::IsTemporaryPath(const Pathname& pathname) { |
| #if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS) |
| ASSERT(provided_app_temp_folder_ != NULL); |
| #endif |
| |
| const char* const kTempPrefixes[] = { |
| #if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS) |
| provided_app_temp_folder_, |
| #else |
| "/tmp/", "/var/tmp/", |
| #if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS) |
| "/private/tmp/", "/private/var/tmp/", "/private/var/folders/", |
| #endif // WEBRTC_MAC && !defined(WEBRTC_IOS) |
| #endif // WEBRTC_ANDROID || WEBRTC_IOS |
| }; |
| for (size_t i = 0; i < arraysize(kTempPrefixes); ++i) { |
| if (0 == strncmp(pathname.pathname().c_str(), kTempPrefixes[i], |
| strlen(kTempPrefixes[i]))) |
| return true; |
| } |
| return false; |
| } |
| |
| bool UnixFilesystem::IsFile(const Pathname& pathname) { |
| struct stat st; |
| int res = ::stat(pathname.pathname().c_str(), &st); |
| // Treat symlinks, named pipes, etc. all as files. |
| return res == 0 && !S_ISDIR(st.st_mode); |
| } |
| |
| bool UnixFilesystem::IsAbsent(const Pathname& pathname) { |
| struct stat st; |
| int res = ::stat(pathname.pathname().c_str(), &st); |
| // Note: we specifically maintain ENOTDIR as an error, because that implies |
| // that you could not call CreateFolder(pathname). |
| return res != 0 && ENOENT == errno; |
| } |
| |
| bool UnixFilesystem::GetFileSize(const Pathname& pathname, size_t *size) { |
| struct stat st; |
| if (::stat(pathname.pathname().c_str(), &st) != 0) |
| return false; |
| *size = st.st_size; |
| return true; |
| } |
| |
| bool UnixFilesystem::GetFileTime(const Pathname& path, FileTimeType which, |
| time_t* time) { |
| struct stat st; |
| if (::stat(path.pathname().c_str(), &st) != 0) |
| return false; |
| switch (which) { |
| case FTT_CREATED: |
| *time = st.st_ctime; |
| break; |
| case FTT_MODIFIED: |
| *time = st.st_mtime; |
| break; |
| case FTT_ACCESSED: |
| *time = st.st_atime; |
| break; |
| default: |
| return false; |
| } |
| return true; |
| } |
| |
| bool UnixFilesystem::GetAppPathname(Pathname* path) { |
| #if defined(__native_client__) |
| return false; |
| #elif defined(WEBRTC_MAC) |
| AppleAppName(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 |