1//===----------------------------------------------------------------------===//
 2//
 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 4// See https://llvm.org/LICENSE.txt for license information.
 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 6//
 7//===----------------------------------------------------------------------===//
 8
 9#include <__config>
10#include <cstdint>
11#include <filesystem>
12#include <system_error>
13
14#include "file_descriptor.h"
15#include "posix_compat.h"
16#include "time_utils.h"
17
18_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
19
20error_code directory_entry::__do_refresh() noexcept {
21  __data_.__reset();
22  error_code failure_ec;
23
24  detail::StatT full_st;
25  file_status st = detail::posix_lstat(__p_, full_st, &failure_ec);
26  if (!status_known(st)) {
27    __data_.__reset();
28    return failure_ec;
29  }
30
31  if (!filesystem::exists(st) || !filesystem::is_symlink(st)) {
32    __data_.__cache_type_    = directory_entry::_RefreshNonSymlink;
33    __data_.__type_          = st.type();
34    __data_.__non_sym_perms_ = st.permissions();
35  } else { // we have a symlink
36    __data_.__sym_perms_ = st.permissions();
37    // Get the information about the linked entity.
38    // Ignore errors from stat, since we don't want errors regarding symlink
39    // resolution to be reported to the user.
40    error_code ignored_ec;
41    st = detail::posix_stat(__p_, full_st, &ignored_ec);
42
43    __data_.__type_          = st.type();
44    __data_.__non_sym_perms_ = st.permissions();
45
46    // If we failed to resolve the link, then only partially populate the
47    // cache.
48    if (!status_known(st)) {
49      __data_.__cache_type_ = directory_entry::_RefreshSymlinkUnresolved;
50      return error_code{};
51    }
52    // Otherwise, we resolved the link, potentially as not existing.
53    // That's OK.
54    __data_.__cache_type_ = directory_entry::_RefreshSymlink;
55  }
56
57  if (filesystem::is_regular_file(st))
58    __data_.__size_ = static_cast<uintmax_t>(full_st.st_size);
59
60  if (filesystem::exists(st)) {
61    __data_.__nlink_ = static_cast<uintmax_t>(full_st.st_nlink);
62
63    // Attempt to extract the mtime, and fail if it's not representable using
64    // file_time_type. For now we ignore the error, as we'll report it when
65    // the value is actually used.
66    error_code ignored_ec;
67    __data_.__write_time_ = detail::__extract_last_write_time(__p_, full_st, &ignored_ec);
68  }
69
70  return failure_ec;
71}
72
73_LIBCPP_END_NAMESPACE_FILESYSTEM