mirror of
https://github.com/oxen-io/lokinet.git
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8d2c22fc72
From https://github.com/gulrak/filesystem which is more up-to-date and looks better maintained than cppbackport.
61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
#include <chrono>
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#include <iomanip>
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#include <iostream>
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#include <string>
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#if defined(__cplusplus) && __cplusplus >= 201703L && defined(__has_include)
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#if __has_include(<filesystem>)
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#define GHC_USE_STD_FS
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#include <filesystem>
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namespace fs = std::filesystem;
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#endif
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#endif
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#ifndef GHC_USE_STD_FS
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#include <ghc/filesystem.hpp>
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namespace fs = ghc::filesystem;
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#endif
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template <typename TP>
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std::time_t to_time_t(TP tp)
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{
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// Based on trick from: Nico Josuttis, C++17 - The Complete Guide
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std::chrono::system_clock::duration dt = std::chrono::duration_cast<std::chrono::system_clock::duration>(tp - TP::clock::now());
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return std::chrono::system_clock::to_time_t(std::chrono::system_clock::now() + dt);
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}
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static std::string perm_to_str(fs::perms prms)
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{
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std::string result;
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result.reserve(9);
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for (int i = 0; i < 9; ++i) {
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result = ((static_cast<int>(prms) & (1 << i)) ? "xwrxwrxwr"[i] : '-') + result;
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}
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return result;
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}
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int main(int argc, char* argv[])
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{
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#ifdef GHC_FILESYSTEM_VERSION
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fs::u8arguments u8guard(argc, argv);
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if (!u8guard.valid()) {
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std::cerr << "Invalid character encoding, UTF-8 based encoding needed." << std::endl;
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std::exit(EXIT_FAILURE);
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}
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#endif
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if (argc > 2) {
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std::cerr << "USAGE: dir <path>" << std::endl;
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exit(1);
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}
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fs::path dir{"."};
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if (argc == 2) {
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dir = fs::u8path(argv[1]);
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}
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for (auto de : fs::directory_iterator(dir)) {
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auto ft = to_time_t(de.last_write_time());
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auto ftm = *std::localtime(&ft);
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std::cout << (de.is_directory() ? "d" : "-") << perm_to_str(de.symlink_status().permissions()) << " " << std::setw(8) << (de.is_directory() ? "-" : std::to_string(de.file_size())) << " " << std::put_time(&ftm, "%Y-%m-%d %H:%M:%S") << " "
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<< de.path().filename().string() << std::endl;
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}
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return 0;
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}
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