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comparison: ipc/chromium/src/base/dir_reader_linux.h
ipc/chromium/src/base/dir_reader_linux.h
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| -1:000000000000 | 0:e504f85048be |
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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef BASE_DIR_READER_LINUX_H_ | |
| 6 #define BASE_DIR_READER_LINUX_H_ | |
| 7 #pragma once | |
| 8 | |
| 9 #include <errno.h> | |
| 10 #include <fcntl.h> | |
| 11 #include <stdint.h> | |
| 12 #include <sys/syscall.h> | |
| 13 #include <unistd.h> | |
| 14 | |
| 15 #include "base/logging.h" | |
| 16 #include "base/eintr_wrapper.h" | |
| 17 | |
| 18 // See the comments in dir_reader_posix.h about this. | |
| 19 | |
| 20 namespace base { | |
| 21 | |
| 22 struct linux_dirent { | |
| 23 uint64_t d_ino; | |
| 24 int64_t d_off; | |
| 25 unsigned short d_reclen; | |
| 26 unsigned char d_type; | |
| 27 char d_name[0]; | |
| 28 }; | |
| 29 | |
| 30 class DirReaderLinux { | |
| 31 public: | |
| 32 explicit DirReaderLinux(const char* directory_path) | |
| 33 : fd_(open(directory_path, O_RDONLY | O_DIRECTORY)), | |
| 34 offset_(0), | |
| 35 size_(0) { | |
| 36 memset(buf_, 0, sizeof(buf_)); | |
| 37 } | |
| 38 | |
| 39 ~DirReaderLinux() { | |
| 40 if (fd_ >= 0) { | |
| 41 if (HANDLE_EINTR(close(fd_))) | |
| 42 DLOG(ERROR) << "Failed to close directory handle"; | |
| 43 } | |
| 44 } | |
| 45 | |
| 46 bool IsValid() const { | |
| 47 return fd_ >= 0; | |
| 48 } | |
| 49 | |
| 50 // Move to the next entry returning false if the iteration is complete. | |
| 51 bool Next() { | |
| 52 if (size_) { | |
| 53 linux_dirent* dirent = reinterpret_cast<linux_dirent*>(&buf_[offset_]); | |
| 54 offset_ += dirent->d_reclen; | |
| 55 } | |
| 56 | |
| 57 if (offset_ != size_) | |
| 58 return true; | |
| 59 | |
| 60 const int r = syscall(__NR_getdents64, fd_, buf_, sizeof(buf_)); | |
| 61 if (r == 0) | |
| 62 return false; | |
| 63 if (r == -1) { | |
| 64 DLOG(ERROR) << "getdents64 returned an error: " << errno; | |
| 65 return false; | |
| 66 } | |
| 67 size_ = r; | |
| 68 offset_ = 0; | |
| 69 return true; | |
| 70 } | |
| 71 | |
| 72 const char* name() const { | |
| 73 if (!size_) | |
| 74 return NULL; | |
| 75 | |
| 76 const linux_dirent* dirent = | |
| 77 reinterpret_cast<const linux_dirent*>(&buf_[offset_]); | |
| 78 return dirent->d_name; | |
| 79 } | |
| 80 | |
| 81 int fd() const { | |
| 82 return fd_; | |
| 83 } | |
| 84 | |
| 85 static bool IsFallback() { | |
| 86 return false; | |
| 87 } | |
| 88 | |
| 89 private: | |
| 90 const int fd_; | |
| 91 unsigned char buf_[512]; | |
| 92 size_t offset_, size_; | |
| 93 | |
| 94 DISALLOW_COPY_AND_ASSIGN(DirReaderLinux); | |
| 95 }; | |
| 96 | |
| 97 } // namespace base | |
| 98 | |
| 99 #endif // BASE_DIR_READER_LINUX_H_ |
