74 lines · cpp
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-exception6//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_FILESYSTEM19 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 symlink36 __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 symlink39 // 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 the47 // 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 using64 // file_time_type. For now we ignore the error, as we'll report it when65 // 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_FILESYSTEM74