mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-12-01 01:36:09 +03:00
102 lines
2.1 KiB
C
102 lines
2.1 KiB
C
|
// Copyright (c) 2012 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.
|
||
|
|
||
|
#ifndef BASE_FILES_DIR_READER_LINUX_H_
|
||
|
#define BASE_FILES_DIR_READER_LINUX_H_
|
||
|
|
||
|
#include <errno.h>
|
||
|
#include <fcntl.h>
|
||
|
#include <stddef.h>
|
||
|
#include <stdint.h>
|
||
|
#include <sys/syscall.h>
|
||
|
#include <unistd.h>
|
||
|
|
||
|
#include "base/logging.h"
|
||
|
#include "base/macros.h"
|
||
|
#include "base/posix/eintr_wrapper.h"
|
||
|
|
||
|
// See the comments in dir_reader_posix.h about this.
|
||
|
|
||
|
namespace base {
|
||
|
|
||
|
struct linux_dirent {
|
||
|
uint64_t d_ino;
|
||
|
int64_t d_off;
|
||
|
unsigned short d_reclen;
|
||
|
unsigned char d_type;
|
||
|
char d_name[0];
|
||
|
};
|
||
|
|
||
|
class DirReaderLinux {
|
||
|
public:
|
||
|
explicit DirReaderLinux(const char* directory_path)
|
||
|
: fd_(open(directory_path, O_RDONLY | O_DIRECTORY)),
|
||
|
offset_(0),
|
||
|
size_(0) {
|
||
|
memset(buf_, 0, sizeof(buf_));
|
||
|
}
|
||
|
|
||
|
~DirReaderLinux() {
|
||
|
if (fd_ >= 0) {
|
||
|
if (IGNORE_EINTR(close(fd_)))
|
||
|
RAW_LOG(ERROR, "Failed to close directory handle");
|
||
|
}
|
||
|
}
|
||
|
|
||
|
bool IsValid() const {
|
||
|
return fd_ >= 0;
|
||
|
}
|
||
|
|
||
|
// Move to the next entry returning false if the iteration is complete.
|
||
|
bool Next() {
|
||
|
if (size_) {
|
||
|
linux_dirent* dirent = reinterpret_cast<linux_dirent*>(&buf_[offset_]);
|
||
|
offset_ += dirent->d_reclen;
|
||
|
}
|
||
|
|
||
|
if (offset_ != size_)
|
||
|
return true;
|
||
|
|
||
|
const int r = syscall(__NR_getdents64, fd_, buf_, sizeof(buf_));
|
||
|
if (r == 0)
|
||
|
return false;
|
||
|
if (r == -1) {
|
||
|
DPLOG(FATAL) << "getdents64 returned an error: " << errno;
|
||
|
return false;
|
||
|
}
|
||
|
size_ = r;
|
||
|
offset_ = 0;
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
const char* name() const {
|
||
|
if (!size_)
|
||
|
return nullptr;
|
||
|
|
||
|
const linux_dirent* dirent =
|
||
|
reinterpret_cast<const linux_dirent*>(&buf_[offset_]);
|
||
|
return dirent->d_name;
|
||
|
}
|
||
|
|
||
|
int fd() const {
|
||
|
return fd_;
|
||
|
}
|
||
|
|
||
|
static bool IsFallback() {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
private:
|
||
|
const int fd_;
|
||
|
alignas(linux_dirent) unsigned char buf_[512];
|
||
|
size_t offset_;
|
||
|
size_t size_;
|
||
|
|
||
|
DISALLOW_COPY_AND_ASSIGN(DirReaderLinux);
|
||
|
};
|
||
|
|
||
|
} // namespace base
|
||
|
|
||
|
#endif // BASE_FILES_DIR_READER_LINUX_H_
|