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74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include <__config>
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#include <cstdint>
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#include <filesystem>
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#include <system_error>
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#include "file_descriptor.h"
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#include "posix_compat.h"
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#include "time_utils.h"
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_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
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error_code directory_entry::__do_refresh() noexcept {
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__data_.__reset();
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error_code failure_ec;
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detail::StatT full_st;
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file_status st = detail::posix_lstat(__p_, full_st, &failure_ec);
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if (!status_known(st)) {
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__data_.__reset();
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return failure_ec;
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}
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if (!filesystem::exists(st) || !filesystem::is_symlink(st)) {
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__data_.__cache_type_ = directory_entry::_RefreshNonSymlink;
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__data_.__type_ = st.type();
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__data_.__non_sym_perms_ = st.permissions();
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} else { // we have a symlink
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__data_.__sym_perms_ = st.permissions();
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// Get the information about the linked entity.
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// Ignore errors from stat, since we don't want errors regarding symlink
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// resolution to be reported to the user.
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error_code ignored_ec;
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st = detail::posix_stat(__p_, full_st, &ignored_ec);
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__data_.__type_ = st.type();
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__data_.__non_sym_perms_ = st.permissions();
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// If we failed to resolve the link, then only partially populate the
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// cache.
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if (!status_known(st)) {
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__data_.__cache_type_ = directory_entry::_RefreshSymlinkUnresolved;
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return error_code{};
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}
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// Otherwise, we resolved the link, potentially as not existing.
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// That's OK.
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__data_.__cache_type_ = directory_entry::_RefreshSymlink;
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}
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if (filesystem::is_regular_file(st))
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__data_.__size_ = static_cast<uintmax_t>(full_st.st_size);
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if (filesystem::exists(st)) {
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__data_.__nlink_ = static_cast<uintmax_t>(full_st.st_nlink);
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// Attempt to extract the mtime, and fail if it's not representable using
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// file_time_type. For now we ignore the error, as we'll report it when
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// the value is actually used.
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error_code ignored_ec;
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__data_.__write_time_ = detail::__extract_last_write_time(__p_, full_st, &ignored_ec);
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}
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return failure_ec;
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}
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_LIBCPP_END_NAMESPACE_FILESYSTEM
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