/*
* libjingle
* Copyright 2004--2006, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "talk/base/unixfilesystem.h"
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#ifdef OSX
#include <Carbon/Carbon.h>
#include <IOKit/IOCFBundle.h>
#include <sys/statvfs.h>
#include "talk/base/macutils.h"
#endif // OSX
#if defined(POSIX) && !defined(OSX)
#include <sys/types.h>
#ifdef ANDROID
#include <sys/statfs.h>
#else
#include <sys/statvfs.h>
#endif // ANDROID
#include <pwd.h>
#include <stdio.h>
#include <unistd.h>
#endif // POSIX && !OSX
#ifdef LINUX
#include <ctype.h>
#include <algorithm>
#endif
#include "talk/base/fileutils.h"
#include "talk/base/pathutils.h"
#include "talk/base/stream.h"
#include "talk/base/stringutils.h"
#ifdef ANDROID
namespace {
// Android does not have a concept of a single temp dir shared by all
// because resource are scarse on a phone. Instead each app gets some
// space on the sdcard under a path that is given at runtime by the
// system.
// The disk allocation feature is still work in progress so currently
// we return a hardcoded a path on the sdcard. In the future, we
// should do a JNI call to get that info from the context.
// TODO: Replace hardcoded path with a query to the Context
// object to get the equivalents of '/tmp' and '~/.'
// @return the folder for libjingle. Some extra path (typically
// Google/<app name>) will be added.
const char* GetAndroidAppDataFolder() {
return "/sdcard";
}
// @return the tmp folder to be used. Some extra path will be added to
// that base folder.
const char* GetAndroidTempFolder() {
return "/sdcard";
}
} // anonymous namespace
#endif
namespace talk_base {
std::string UnixFilesystem::app_temp_path_;
bool UnixFilesystem::CreateFolder(const Pathname &path) {
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)))) {
return false;
}
LOG(LS_INFO) << "Creating folder: " << pathname;
return (0 == ::mkdir(pathname.c_str(), 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())) {
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) {
#ifdef OSX
FSRef fr;
if (0 != FSFindFolder(kOnAppropriateDisk, kTemporaryFolderType,
kCreateFolder, &fr))
return false;
unsigned char buffer[NAME_MAX+1];
if (0 != FSRefMakePath(&fr, buffer, ARRAY_SIZE(buffer)))
return false;
pathname.SetPathname(reinterpret_cast<char*>(buffer), "");
#elif defined(ANDROID)
pathname.SetPathname(GetAndroidTempFolder(), "");
#else // !OSX && !ANDROID
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 // !OSX && !ANDROID
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) {
const char* const kTempPrefixes[] = {
#ifdef ANDROID
GetAndroidTempFolder()
#else
"/tmp/", "/var/tmp/",
#ifdef OSX
"/private/tmp/", "/private/var/tmp/", "/private/var/folders/",
#endif // OSX
#endif // ANDROID
};
for (size_t i = 0; i < ARRAY_SIZE(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) {
#ifdef OSX
ProcessSerialNumber psn = { 0, kCurrentProcess };
CFDictionaryRef procinfo = ProcessInformationCopyDictionary(&psn,
kProcessDictionaryIncludeAllInformationMask);
if (NULL == procinfo)
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;
#else // OSX
char buffer[NAME_MAX+1];
size_t len = readlink("/proc/self/exe", buffer, ARRAY_SIZE(buffer) - 1);
if (len <= 0)
return false;
buffer[len] = '\0';
path->SetPathname(buffer);
return true;
#endif // OSX
}
bool UnixFilesystem::GetAppDataFolder(Pathname* path, bool per_user) {
ASSERT(!organization_name_.empty());
ASSERT(!application_name_.empty());
// First get the base directory for app data.
#ifdef OSX
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, ARRAY_SIZE(buffer)))
return false;
path->SetPathname(reinterpret_cast<char*>(buffer), "");
} else {
// TODO
return false;
}
#elif defined(ANDROID) // && !OSX
// TODO: Check if the new disk allocation mechanism works
// per-user and we don't have the per_user distinction.
path->SetPathname(GetAndroidAppDataFolder(), "");
#elif defined(LINUX) // && !OSX && !defined(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 // !OSX && !defined(ANDROID) && !defined(LINUX)
// Now add on a sub-path for our app.
#if defined(OSX) || defined(ANDROID)
path->AppendFolder(organization_name_);
path->AppendFolder(application_name_);
#elif defined(LINUX)
// 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
return CreateFolder(*path);
}
bool UnixFilesystem::GetAppTempFolder(Pathname* path) {
ASSERT(!application_name_.empty());
// TODO: Consider whether we are worried about thread safety.
if (!app_temp_path_.empty()) {
path->SetPathname(app_temp_path_);
return true;
}
// Create a random directory as /tmp/<appname>-<pid>-<timestamp>
char buffer[128];
sprintfn(buffer, ARRAY_SIZE(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;
app_temp_path_ = path->pathname();
// TODO: atexit(DeleteFolderAndContents(app_temp_path_));
return true;
}
bool UnixFilesystem::GetDiskFreeSpace(const Pathname& path, int64 *freebytes) {
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());
}
#ifdef ANDROID
struct statfs fs;
memset(&fs, 0, sizeof(fs));
if (0 != statfs(existing_path.pathname().c_str(), &fs))
return false;
#else
struct statvfs vfs;
memset(&vfs, 0, sizeof(vfs));
if (0 != statvfs(existing_path.pathname().c_str(), &vfs))
return false;
#endif // ANDROID
#ifdef LINUX
*freebytes = static_cast<int64>(vfs.f_bsize) * vfs.f_bavail;
#elif defined(OSX)
*freebytes = static_cast<int64>(vfs.f_frsize) * vfs.f_bavail;
#elif defined(ANDROID)
*freebytes = static_cast<int64>(fs.f_bsize) * fs.f_bavail;
#endif
return true;
}
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;
}
} // namespace talk_base