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// file : tests/link/driver.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2018 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <cassert>
#ifndef __cpp_lib_modules
#include <set>
#include <utility> // pair
#include <iostream> // cerr
#include <system_error>
#endif
// Other includes.
#ifdef __cpp_modules
#ifdef __cpp_lib_modules
import std.core;
import std.io;
#endif
import butl.path;
import butl.path_io;
import butl.utility;
import butl.fdstream;
import butl.filesystem;
#else
#include <libbutl/path.mxx>
#include <libbutl/path-io.mxx>
#include <libbutl/utility.mxx>
#include <libbutl/fdstream.mxx>
#include <libbutl/filesystem.mxx>
#endif
using namespace std;
using namespace butl;
static const char text[] = "ABCDEF";
static bool
link_file (const path& target, const path& link, bool hard, bool check_content)
{
try
{
if (hard)
mkhardlink (target, link);
else
mksymlink (target, link);
}
catch (const system_error&)
{
return false;
}
if (!check_content)
return true;
string s;
ifdstream ifs (link);
ifs >> s;
ifs.close (); // Not to miss failed close of the underlying file descriptor.
return s == text;
}
static bool
link_dir (const dir_path& target,
const dir_path& link,
bool hard,
bool check_content)
{
try
{
if (hard)
mkhardlink (target, link);
else
mksymlink (target, link);
}
catch (const system_error&)
{
//cerr << e << endl;
return false;
}
{
auto pe (path_entry (link, false /* follow_symlinks */));
assert (pe.first && pe.second.type == entry_type::symlink);
}
{
auto pe (path_entry (link, true /* follow_symlinks */));
assert (!pe.first || pe.second.type == entry_type::directory);
}
if (!check_content)
return true;
dir_path tp (target.absolute () ? target : link.directory () / target);
set<pair<entry_type, path>> te;
for (const dir_entry& de: dir_iterator (tp, false /* ignore_dangling */))
te.emplace (de.ltype (), de.path ());
set<pair<entry_type, path>> le;
for (const dir_entry& de: dir_iterator (link, false /* ignore_dangling */))
le.emplace (de.ltype (), de.path ());
return te == le;
}
int
main ()
{
dir_path td (dir_path::temp_directory () / dir_path ("butl-link"));
// Recreate the temporary directory (that possibly exists from the previous
// faulty run) for the test files. Delete the directory only if the test
// succeeds to simplify the failure research.
//
try
{
try_rmdir_r (td);
}
catch (const system_error& e)
{
cerr << "unable to remove " << td << ": " << e << endl;
return 1;
}
assert (try_mkdir (td) == mkdir_status::success);
// Prepare the target file.
//
path fn ("target");
path fp (td / fn);
{
ofdstream ofs (fp);
ofs << text;
ofs.close ();
}
// Create the file hard link.
//
assert (link_file (fp, td / path ("hlink"), true, true));
#ifndef _WIN32
// Create the file symlink using an absolute path.
//
assert (link_file (fp, td / path ("slink"), false, true));
// Create the file symlink using a relative path.
//
assert (link_file (fn, td / path ("rslink"), false, true));
// Create the file symlink using an unexistent file path.
//
assert (link_file (fp + "-a", td / path ("sa"), false, false));
#endif
// Prepare the target directory.
//
dir_path dn ("dir");
dir_path dp (td / dn);
assert (try_mkdir (dp) == mkdir_status::success);
{
ofdstream ofs (dp / path ("f"));
ofs << text;
ofs.close ();
}
#ifndef _WIN32
assert (link_file (fp, dp / path ("hlink"), true, true));
assert (link_file (fp, dp / path ("slink"), false, true));
#endif
// Create the directory symlink using an absolute path.
//
dir_path ld (td / dir_path ("dslink"));
assert (link_dir (dp, ld, false, true));
try_rmsymlink (ld);
#ifndef _WIN32
// Create the directory symlink using an unexistent directory path.
//
assert (link_dir (dp / dir_path ("a"), td / dir_path ("dsa"), false, false));
// Create the directory symlink using a relative path.
//
assert (link_dir (dn, td / dir_path ("rdslink"), false, true));
#endif
try
{
rmdir_r (td);
}
catch (const system_error& e)
{
cerr << "unable to remove " << td << ": " << e << endl;
return 1;
}
}
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