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

   1 // Copyright (C) 2017-2021 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 // { dg-xfail-if "symlinks not supported" { *-*-mingw* } }
  21
  22 #include <filesystem>
  23 #include <testsuite_hooks.h>
  24 #include <testsuite_fs.h>
  25
  26 namespace fs = std::filesystem;
  27
  28 void
  29 test01()
  30 {
  31   const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
  32   std::error_code ec = bad_ec;
  33   fs::path dot = ".";
  34
  35   fs::file_status st1 = fs::symlink_status(dot, ec);
  36   VERIFY( !ec );
  37   VERIFY( st1.type() == fs::file_type::directory );
  38
  39   fs::file_status st2 = fs::symlink_status(dot);
  40   VERIFY( st2.type() == fs::file_type::directory );
  41
  42   fs::path link = __gnu_test::nonexistent_path();
  43   create_directory_symlink(dot, link);
  44   __gnu_test::scoped_file l(link, __gnu_test::scoped_file::adopt_file);
  45
  46   st1 = fs::symlink_status(link);
  47   VERIFY( st1.type() == fs::file_type::symlink );
  48   ec = bad_ec;
  49   st2 = fs::symlink_status(link, ec);
  50   VERIFY( !ec );
  51   VERIFY( st2.type() == fs::file_type::symlink );
  52 }
  53
  54 void
  55 test02()
  56 {
  57   fs::path p = __gnu_test::nonexistent_path();
  58
  59   std::error_code ec;
  60   fs::file_status st1 = fs::symlink_status(p, ec);
  61   VERIFY( ec );
  62   VERIFY( st1.type() == fs::file_type::not_found );
  63
  64   fs::file_status st2 = fs::symlink_status(p);
  65   VERIFY( st2.type() == fs::file_type::not_found );
  66 }
  67
  68 void
  69 test03()
  70 {
  71   if (!__gnu_test::permissions_are_testable())
  72     return;
  73
  74   fs::path dir = __gnu_test::nonexistent_path();
  75   fs::create_directory(dir);
  76   __gnu_test::scoped_file d(dir, __gnu_test::scoped_file::adopt_file);
  77   __gnu_test::scoped_file f(dir / "file");
  78   fs::permissions(dir, fs::perms::none);
  79   auto link = __gnu_test::nonexistent_path();
  80   fs::create_symlink(f.path, link);
  81   __gnu_test::scoped_file l(link, __gnu_test::scoped_file::adopt_file);
  82
  83   std::error_code ec;
  84   fs::file_status st = fs::symlink_status(f.path, ec);
  85   VERIFY( ec.value() == (int)std::errc::permission_denied );
  86   VERIFY( st.type() == fs::file_type::none );
  87
  88   st = fs::symlink_status(link, ec);
  89   VERIFY( !ec );
  90   VERIFY( st.type() == fs::file_type::symlink );
  91
  92 #if __cpp_exceptions
  93   bool caught = false;
  94   std::error_code ec2;
  95   fs::path p, p2;
  96   try {
  97     fs::symlink_status(f.path);
  98   } catch (const fs::filesystem_error& e) {
  99     caught = true;
 100     p = e.path1();
 101     p2 = e.path2();
 102     ec2 = e.code();
 103   }
 104   VERIFY( caught );
 105   VERIFY( ec2.value() == (int)std::errc::permission_denied );
 106   VERIFY( p == f.path );
 107   VERIFY( p2.empty() );
 108 #endif
 109
 110   fs::file_status st2 = symlink_status(link);
 111   VERIFY( st2.type() == fs::file_type::symlink );
 112
 113   fs::permissions(dir, fs::perms::owner_all, ec);
 114 }
 115
 116 void
 117 test04()
 118 {
 119   // PR libstdc++/88881
 120   fs::path p = "./";
 121   auto st = symlink_status(p);
 122   VERIFY( is_directory(st) );
 123 }
 124
 125 int
 126 main()
 127 {
 128   test01();
 129   test02();
 130   test03();
 131   test04();
 132 }