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

   1 // Copyright (C) 2016-2023 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 namespace fs = std::filesystem;
  26
  27 void
  28 test01()
  29 {
  30   std::error_code ec;
  31   const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
  32   std::uintmax_t n;
  33
  34   n = fs::remove_all("", ec);
  35   VERIFY( !ec ); // This seems odd, but is what the standard requires.
  36   VERIFY( n == 0 );
  37
  38   auto p = __gnu_test::nonexistent_path();
  39   ec = bad_ec;
  40   n = remove_all(p, ec);
  41   VERIFY( !ec );
  42   VERIFY( n == 0 );
  43
  44 #ifndef NO_SYMLINKS
  45   auto link = __gnu_test::nonexistent_path();
  46   create_symlink(p, link);  // dangling symlink
  47   ec = bad_ec;
  48   n = remove_all(link, ec);
  49   VERIFY( !ec );
  50   VERIFY( n == 1 );
  51   VERIFY( !exists(symlink_status(link)) ); // DR 2721
  52
  53   __gnu_test::scoped_file f(p);
  54   create_symlink(p, link);
  55   ec = bad_ec;
  56   n = remove_all(link, ec);
  57   VERIFY( !ec );
  58   VERIFY( n == 1 );
  59   VERIFY( !exists(symlink_status(link)) );  // The symlink is removed, but
  60   VERIFY( exists(p) );                      // its target is not.
  61 #endif
  62
  63   const auto dir = __gnu_test::nonexistent_path();
  64   create_directories(dir/"a/b/c");
  65   ec = bad_ec;
  66   n = remove_all(dir/"a", ec);
  67   VERIFY( !ec );
  68   VERIFY( n == 3 );
  69   VERIFY( exists(dir) );
  70   VERIFY( !exists(dir/"a") );
  71
  72   create_directories(dir/"a/b/c");
  73   __gnu_test::scoped_file a1(dir/"a/1");
  74   __gnu_test::scoped_file a2(dir/"a/2");
  75   __gnu_test::scoped_file b1(dir/"a/b/1");
  76   __gnu_test::scoped_file b2(dir/"a/b/2");
  77   ec = bad_ec;
  78   n = remove_all(dir, ec);
  79   VERIFY( !ec );
  80   VERIFY( n == 8 );
  81   VERIFY( !exists(dir) );
  82
  83   a1.path.clear();
  84   a2.path.clear();
  85   b1.path.clear();
  86   b2.path.clear();
  87 }
  88
  89 void
  90 test02()
  91 {
  92   const auto dir = __gnu_test::nonexistent_path();
  93   create_directories(dir/"a/b/c");
  94   std::uintmax_t n = remove_all(dir/"a");
  95   VERIFY( n == 3 );
  96   VERIFY( exists(dir) );
  97   VERIFY( !exists(dir/"a") );
  98
  99   n = remove_all(dir/"a");
 100   VERIFY( n == 0 );
 101   VERIFY( exists(dir) );
 102
 103   n = remove_all(dir);
 104   VERIFY( n == 1 );
 105   VERIFY( !exists(dir) );
 106 }
 107
 108 void
 109 test03()
 110 {
 111   // PR libstdc++/88881 symlink_status confused by trailing slash on Windows
 112   const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
 113   unsigned removed;
 114   std::error_code ec = bad_ec;
 115   const auto p = __gnu_test::nonexistent_path() / ""; // with trailing slash
 116
 117   create_directories(p);
 118   removed = remove_all(p, ec);
 119   VERIFY( !ec );
 120   VERIFY( removed == 1 );
 121   VERIFY( !exists(p) );
 122   create_directories(p);
 123   removed = remove_all(p);
 124   VERIFY( removed == 1 );
 125   VERIFY( !exists(p) );
 126
 127   const auto p_subs = p/"foo/bar";
 128   ec = bad_ec;
 129   create_directories(p_subs);
 130   removed = remove_all(p, ec);
 131   VERIFY( !ec );
 132   VERIFY( removed == 3 );
 133   VERIFY( !exists(p) );
 134   create_directories(p_subs);
 135   remove_all(p);
 136   VERIFY( removed == 3 );
 137   VERIFY( !exists(p) );
 138 }
 139
 140 void
 141 test04()
 142 {
 143   if (!__gnu_test::permissions_are_testable())
 144     return;
 145
 146   // PR libstdc++/93201
 147   std::error_code ec;
 148   std::uintmax_t n;
 149
 150   auto dir = __gnu_test::nonexistent_path();
 151   fs::create_directory(dir);
 152   __gnu_test::scoped_file f(dir/"file");
 153   // remove write permission on the directory:
 154   fs::permissions(dir, fs::perms::owner_read|fs::perms::owner_exec);
 155   n = fs::remove_all(dir, ec);
 156   VERIFY( n == std::uintmax_t(-1) );
 157   VERIFY( ec == std::errc::permission_denied ); // not ENOTEMPTY
 158
 159   try {
 160     fs::remove_all(dir);
 161     VERIFY( false );
 162   } catch (const fs::filesystem_error& e) {
 163     VERIFY( e.code() == std::errc::permission_denied );
 164     // First path is the argument to remove_all
 165     VERIFY( e.path1() == dir );
 166     // Second path is the first file that couldn't be removed
 167     VERIFY( e.path2() == dir/"file" );
 168   }
 169
 170   fs::permissions(dir, fs::perms::owner_write, fs::perm_options::add);
 171   fs::remove_all(dir, ec);
 172   f.path.clear();
 173 }
 174
 175 int
 176 main()
 177 {
 178   test01();
 179   test02();
 180   test03();
 181   test04();
 182 }