LCOV - code coverage report
Current view: top level - tests/integration/harness/gkfs.io - readdir.cpp (source / functions) Hit Total Coverage
Test: coverage.info Lines: 26 37 70.3 %
Date: 2024-04-23 00:09:24 Functions: 3 3 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*
       2             :   Copyright 2018-2024, Barcelona Supercomputing Center (BSC), Spain
       3             :   Copyright 2015-2024, Johannes Gutenberg Universitaet Mainz, Germany
       4             : 
       5             :   This software was partially supported by the
       6             :   EC H2020 funded project NEXTGenIO (Project ID: 671951, www.nextgenio.eu).
       7             : 
       8             :   This software was partially supported by the
       9             :   ADA-FS project under the SPPEXA project funded by the DFG.
      10             : 
      11             :   This file is part of GekkoFS.
      12             : 
      13             :   GekkoFS is free software: you can redistribute it and/or modify
      14             :   it under the terms of the GNU General Public License as published by
      15             :   the Free Software Foundation, either version 3 of the License, or
      16             :   (at your option) any later version.
      17             : 
      18             :   GekkoFS is distributed in the hope that it will be useful,
      19             :   but WITHOUT ANY WARRANTY; without even the implied warranty of
      20             :   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      21             :   GNU General Public License for more details.
      22             : 
      23             :   You should have received a copy of the GNU General Public License
      24             :   along with GekkoFS.  If not, see <https://www.gnu.org/licenses/>.
      25             : 
      26             :   SPDX-License-Identifier: GPL-3.0-or-later
      27             : */
      28             : 
      29             : /* C++ includes */
      30             : #include <CLI/CLI.hpp>
      31             : #include <nlohmann/json.hpp>
      32             : #include <memory>
      33             : #include <fmt/format.h>
      34             : #include <commands.hpp>
      35             : #include <reflection.hpp>
      36             : #include <serialize.hpp>
      37             : #include <binary_buffer.hpp>
      38             : 
      39             : /* C includes */
      40             : #include <dirent.h>
      41             : #include <unistd.h>
      42             : 
      43             : using json = nlohmann::json;
      44             : 
      45         536 : struct readdir_options {
      46             :     bool verbose{};
      47             :     std::string pathname;
      48             :     ::size_t count;
      49             : 
      50             :     REFL_DECL_STRUCT(readdir_options, REFL_DECL_MEMBER(bool, verbose),
      51             :                      REFL_DECL_MEMBER(std::string, pathname),
      52             :                      REFL_DECL_MEMBER(::size_t, count));
      53             : };
      54             : 
      55          12 : struct readdir_output {
      56             :     std::vector<struct ::dirent> dirents;
      57             :     int errnum;
      58             : 
      59             :     REFL_DECL_STRUCT(readdir_output,
      60             :                      REFL_DECL_MEMBER(std::vector<struct ::dirent>, dirents),
      61             :                      REFL_DECL_MEMBER(int, errnum));
      62             : };
      63             : 
      64             : void
      65          12 : to_json(json& record, const readdir_output& out) {
      66          12 :     record = serialize(out);
      67          12 : }
      68             : 
      69             : void
      70          12 : readdir_exec(const readdir_options& opts) {
      71             : 
      72          12 :     ::DIR* dirp = ::opendir(opts.pathname.c_str());
      73             : 
      74          12 :     if(dirp == NULL) {
      75           0 :         if(opts.verbose) {
      76           0 :             fmt::print("readdir(pathname=\"{}\") = {}, errno: {} [{}]\n",
      77           0 :                        opts.pathname, "NULL", errno, ::strerror(errno));
      78           0 :             return;
      79             :         }
      80             : 
      81           0 :         json out = readdir_output{{}, errno};
      82           0 :         fmt::print("{}\n", out.dump(2));
      83             : 
      84           0 :         return;
      85             :     }
      86             : 
      87          24 :     io::buffer buf(opts.count);
      88             : 
      89          24 :     std::vector<struct ::dirent> entries;
      90          26 :     struct ::dirent* entry;
      91             : 
      92          26 :     while((entry = ::readdir(dirp)) != NULL) {
      93          14 :         entries.push_back(*entry);
      94             :     }
      95             : 
      96          12 :     if(opts.verbose) {
      97           0 :         fmt::print("readdir(pathname=\"{}\") = [\n{}],\nerrno: {} [{}]\n",
      98           0 :                    opts.pathname, fmt::join(entries, ",\n"), errno,
      99           0 :                    ::strerror(errno));
     100           0 :         return;
     101             :     }
     102             : 
     103          24 :     json out = readdir_output{entries, errno};
     104          24 :     fmt::print("{}\n", out.dump(2));
     105             : }
     106             : 
     107             : void
     108         268 : readdir_init(CLI::App& app) {
     109             : 
     110             :     // Create the option and subcommand objects
     111         268 :     auto opts = std::make_shared<readdir_options>();
     112         268 :     auto* cmd =
     113         268 :             app.add_subcommand("readdir", "Execute the readdir() system call");
     114             : 
     115             :     // Add options to cmd, binding them to opts
     116         268 :     cmd->add_flag("-v,--verbose", opts->verbose,
     117         536 :                   "Produce human readable output");
     118             : 
     119         536 :     cmd->add_option("pathname", opts->pathname, "Directory name")
     120             :             ->required()
     121         536 :             ->type_name("");
     122             : 
     123        1084 :     cmd->callback([opts]() { readdir_exec(*opts); });
     124         268 : }

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