libstdc++-v3/testsuite/27_io/filesystem/operations/exists.cc

   1 // Copyright (C) 2015-2022 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do run { target c++17 } }
  19 // { dg-require-filesystem-ts "" }
  20
  21 #include <filesystem>
  22 #include <testsuite_hooks.h>
  23 #include <testsuite_fs.h>
  24
  25 using std::filesystem::path;
  26
  27 void
  28 test01()
  29 {
  30   const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
  31   const path root = __gnu_test::root_path();
  32
  33   VERIFY( exists(root) );
  34   VERIFY( exists(root/".") );
  35   VERIFY( exists(path{"."}) );
  36   VERIFY( exists(path{".."}) );
  37   VERIFY( exists(std::filesystem::current_path()) );
  38
  39   std::error_code ec;
  40   ec = bad_ec;
  41   VERIFY( exists(root, ec) );
  42   VERIFY( !ec );
  43   ec = bad_ec;
  44   VERIFY( exists(root/".", ec) );
  45   VERIFY( !ec );
  46   ec = bad_ec;
  47   VERIFY( exists(path{"."}, ec) );
  48   VERIFY( !ec );
  49   ec = bad_ec;
  50   VERIFY( exists(path{".."}, ec) );
  51   VERIFY( !ec );
  52   ec = bad_ec;
  53   VERIFY( exists(std::filesystem::current_path(), ec) );
  54   VERIFY( !ec );
  55 }
  56
  57 void
  58 test02()
  59 {
  60   path rel = __gnu_test::nonexistent_path();
  61   VERIFY( !exists(rel) );
  62
  63   std::error_code ec = std::make_error_code(std::errc::invalid_argument);
  64   VERIFY( !exists(rel, ec) );
  65   VERIFY( !ec ); // DR 2725
  66 }
  67
  68 void
  69 test03()
  70 {
  71   path abs = absolute(__gnu_test::nonexistent_path());
  72   VERIFY( !exists(abs) );
  73
  74   std::error_code ec = std::make_error_code(std::errc::invalid_argument);
  75   VERIFY( !exists(abs, ec) );
  76   VERIFY( !ec ); // DR 2725
  77 }
  78
  79 void
  80 test04()
  81 {
  82   if (!__gnu_test::permissions_are_testable())
  83     return;
  84
  85   using std::filesystem::perms;
  86   using std::filesystem::perm_options;
  87   path p = __gnu_test::nonexistent_path();
  88   create_directory(p);
  89   permissions(p, perms::all, perm_options::remove);
  90
  91   auto unr = p / "unreachable";
  92   std::error_code ec;
  93   VERIFY( !exists(unr, ec) );
  94   VERIFY( ec == std::errc::permission_denied );
  95   ec.clear();
  96   try
  97   {
  98     exists(unr);
  99   }
 100   catch(const std::filesystem::filesystem_error& ex)
 101   {
 102     ec = ex.code();
 103     VERIFY( ex.path1() == unr );
 104   }
 105   VERIFY( ec == std::errc::permission_denied );
 106
 107   permissions(p, perms::owner_all);
 108   remove(p);
 109 }
 110
 111 int
 112 main()
 113 {
 114   test01();
 115   test02();
 116   test03();
 117   test04();
 118 }