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

   1 // Copyright (C) 2016-2019 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
  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   std::error_code ec, ec2;
  32   __gnu_test::scoped_file f;
  33   auto tgt = f.path;
  34
  35   // Test empty path.
  36   fs::path p;
  37   create_symlink(tgt, p, ec );
  38   VERIFY( ec );
  39   try
  40   {
  41     create_symlink(tgt, p);
  42   }
  43   catch (const std::filesystem::filesystem_error& ex)
  44   {
  45     ec2 = ex.code();
  46     VERIFY( ex.path1() == tgt );
  47     VERIFY( ex.path2() == p );
  48   }
  49   VERIFY( ec2 == ec );
  50 }
  51
  52 void
  53 test02()
  54 {
  55   const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
  56   std::error_code ec, ec2;
  57   __gnu_test::scoped_file f;
  58   auto tgt = f.path;
  59
  60   // Test non-existent path
  61   auto p = __gnu_test::nonexistent_path();
  62   VERIFY( !exists(p) );
  63
  64   ec = bad_ec;
  65   create_symlink(tgt, p, ec); // create the symlink once
  66   VERIFY( !ec );
  67   VERIFY( exists(p) );
  68   VERIFY( is_symlink(p) );
  69   remove(p);
  70   create_symlink(tgt, p); // create the symlink again
  71   VERIFY( exists(p) );
  72   VERIFY( is_symlink(p) );
  73
  74   ec.clear();
  75   create_symlink(tgt, p, ec); // Try to create existing symlink
  76   VERIFY( ec );
  77   try
  78   {
  79     create_symlink(tgt, p);
  80   }
  81   catch (const std::filesystem::filesystem_error& ex)
  82   {
  83     ec2 = ex.code();
  84     VERIFY( ex.path1() == tgt );
  85     VERIFY( ex.path2() == p );
  86   }
  87   VERIFY( ec2 == ec );
  88
  89   remove(p);
  90 }
  91
  92 int
  93 main()
  94 {
  95   test01();
  96 }