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// Copyright (c) 2013 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.
#include "base/files/file_enumerator.h"
#include <dirent.h>
#include <errno.h>
#include <fnmatch.h>
#include <stdint.h>
#include "base/logging.h"
#include "base/threading/thread_restrictions.h"
#include "build/build_config.h"
namespace base {
// FileEnumerator::FileInfo ----------------------------------------------------
FileEnumerator::FileInfo::FileInfo() {
memset(&stat_, 0, sizeof(stat_));
}
bool FileEnumerator::FileInfo::IsDirectory() const {
return S_ISDIR(stat_.st_mode);
}
FilePath FileEnumerator::FileInfo::GetName() const {
return filename_;
}
int64_t FileEnumerator::FileInfo::GetSize() const {
return stat_.st_size;
}
base::Time FileEnumerator::FileInfo::GetLastModifiedTime() const {
return base::Time::FromTimeT(stat_.st_mtime);
}
// FileEnumerator --------------------------------------------------------------
FileEnumerator::FileEnumerator(const FilePath& root_path,
bool recursive,
int file_type)
: current_directory_entry_(0),
root_path_(root_path),
recursive_(recursive),
file_type_(file_type) {
// INCLUDE_DOT_DOT must not be specified if recursive.
DCHECK(!(recursive && (INCLUDE_DOT_DOT & file_type_)));
pending_paths_.push(root_path);
}
FileEnumerator::FileEnumerator(const FilePath& root_path,
bool recursive,
int file_type,
const FilePath::StringType& pattern)
: current_directory_entry_(0),
root_path_(root_path),
recursive_(recursive),
file_type_(file_type),
pattern_(root_path.Append(pattern).value()) {
// INCLUDE_DOT_DOT must not be specified if recursive.
DCHECK(!(recursive && (INCLUDE_DOT_DOT & file_type_)));
// The Windows version of this code appends the pattern to the root_path,
// potentially only matching against items in the top-most directory.
// Do the same here.
if (pattern.empty())
pattern_ = FilePath::StringType();
pending_paths_.push(root_path);
}
FileEnumerator::~FileEnumerator() {
}
FilePath FileEnumerator::Next() {
++current_directory_entry_;
// While we've exhausted the entries in the current directory, do the next
while (current_directory_entry_ >= directory_entries_.size()) {
if (pending_paths_.empty())
return FilePath();
root_path_ = pending_paths_.top();
root_path_ = root_path_.StripTrailingSeparators();
pending_paths_.pop();
std::vector<FileInfo> entries;
if (!ReadDirectory(&entries, root_path_, file_type_ & SHOW_SYM_LINKS))
continue;
directory_entries_.clear();
current_directory_entry_ = 0;
for (std::vector<FileInfo>::const_iterator i = entries.begin();
i != entries.end(); ++i) {
FilePath full_path = root_path_.Append(i->filename_);
if (ShouldSkip(full_path))
continue;
if (pattern_.size() &&
fnmatch(pattern_.c_str(), full_path.value().c_str(), FNM_NOESCAPE))
continue;
if (recursive_ && S_ISDIR(i->stat_.st_mode))
pending_paths_.push(full_path);
if ((S_ISDIR(i->stat_.st_mode) && (file_type_ & DIRECTORIES)) ||
(!S_ISDIR(i->stat_.st_mode) && (file_type_ & FILES)))
directory_entries_.push_back(*i);
}
}
return root_path_.Append(
directory_entries_[current_directory_entry_].filename_);
}
FileEnumerator::FileInfo FileEnumerator::GetInfo() const {
return directory_entries_[current_directory_entry_];
}
bool FileEnumerator::ReadDirectory(std::vector<FileInfo>* entries,
const FilePath& source, bool show_links) {
base::ThreadRestrictions::AssertIOAllowed();
DIR* dir = opendir(source.value().c_str());
if (!dir)
return false;
#if !defined(OS_LINUX) && !defined(OS_MACOSX) && !defined(OS_BSD) && \
!defined(OS_SOLARIS) && !defined(OS_ANDROID)
#error Port warning: depending on the definition of struct dirent, \
additional space for pathname may be needed
#endif
struct dirent dent_buf;
struct dirent* dent;
while (readdir_r(dir, &dent_buf, &dent) == 0 && dent) {
FileInfo info;
info.filename_ = FilePath(dent->d_name);
FilePath full_name = source.Append(dent->d_name);
int ret;
if (show_links)
ret = lstat(full_name.value().c_str(), &info.stat_);
else
ret = stat(full_name.value().c_str(), &info.stat_);
if (ret < 0) {
// Print the stat() error message unless it was ENOENT and we're
// following symlinks.
if (!(errno == ENOENT && !show_links)) {
DPLOG(ERROR) << "Couldn't stat "
<< source.Append(dent->d_name).value();
}
memset(&info.stat_, 0, sizeof(info.stat_));
}
entries->push_back(info);
}
closedir(dir);
return true;
}
} // namespace base
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