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

   1 // Copyright (C) 2017-2018 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-options "-std=gnu++17 -lstdc++fs" }
  19 // { dg-do run { target c++17 } }
  20 // { dg-require-filesystem-ts "" }
  21 // { dg-xfail-if "symlinks not supported" { *-*-mingw* } }
  22
  23 #include <filesystem>
  24 #include <testsuite_hooks.h>
  25 #include <testsuite_fs.h>
  26
  27 namespace fs = std::filesystem;
  28
  29 void
  30 test01()
  31 {
  32   const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
  33   std::error_code ec = bad_ec;
  34   fs::path dot = ".";
  35
  36   fs::file_status st1 = fs::symlink_status(dot, ec);
  37   VERIFY( !ec );
  38   VERIFY( st1.type() == fs::file_type::directory );
  39
  40   fs::file_status st2 = fs::symlink_status(dot);
  41   VERIFY( st2.type() == fs::file_type::directory );
  42
  43   fs::path link = __gnu_test::nonexistent_path();
  44   create_directory_symlink(dot, link);
  45   __gnu_test::scoped_file l(link, __gnu_test::scoped_file::adopt_file);
  46
  47   st1 = fs::symlink_status(link);
  48   VERIFY( st1.type() == fs::file_type::symlink );
  49   ec = bad_ec;
  50   st2 = fs::symlink_status(link, ec);
  51   VERIFY( !ec );
  52   VERIFY( st2.type() == fs::file_type::symlink );
  53 }
  54
  55 void
  56 test02()
  57 {
  58   fs::path p = __gnu_test::nonexistent_path();
  59
  60   std::error_code ec;
  61   fs::file_status st1 = fs::symlink_status(p, ec);
  62   VERIFY( ec );
  63   VERIFY( st1.type() == fs::file_type::not_found );
  64
  65   fs::file_status st2 = fs::symlink_status(p);
  66   VERIFY( st2.type() == fs::file_type::not_found );
  67 }
  68
  69 void
  70 test03()
  71 {
  72   fs::path dir = __gnu_test::nonexistent_path();
  73   fs::create_directory(dir);
  74   __gnu_test::scoped_file d(dir, __gnu_test::scoped_file::adopt_file);
  75   __gnu_test::scoped_file f(dir / "file");
  76   fs::permissions(dir, fs::perms::none);
  77   auto link = __gnu_test::nonexistent_path();
  78   fs::create_symlink(f.path, link);
  79   __gnu_test::scoped_file l(link, __gnu_test::scoped_file::adopt_file);
  80
  81   std::error_code ec;
  82   fs::file_status st = fs::symlink_status(f.path, ec);
  83   VERIFY( ec.value() == (int)std::errc::permission_denied );
  84   VERIFY( st.type() == fs::file_type::none );
  85
  86   st = fs::symlink_status(link, ec);
  87   VERIFY( !ec );
  88   VERIFY( st.type() == fs::file_type::symlink );
  89
  90 #if __cpp_exceptions
  91   bool caught = false;
  92   std::error_code ec2;
  93   fs::path p, p2;
  94   try {
  95     fs::symlink_status(f.path);
  96   } catch (const fs::filesystem_error& e) {
  97     caught = true;
  98     p = e.path1();
  99     p2 = e.path2();
 100     ec2 = e.code();
 101   }
 102   VERIFY( caught );
 103   VERIFY( ec2.value() == (int)std::errc::permission_denied );
 104   VERIFY( p == f.path );
 105   VERIFY( p2.empty() );
 106 #endif
 107
 108   fs::file_status st2 = symlink_status(link);
 109   VERIFY( st2.type() == fs::file_type::symlink );
 110
 111   fs::permissions(dir, fs::perms::owner_all, ec);
 112 }
 113
 114 int
 115 main()
 116 {
 117   test01();
 118   test02();
 119   test03();
 120 }