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// file : tests/cpfile/driver.cxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#ifndef __cpp_lib_modules_ts
#include <ios>
#include <string>
#include <system_error>
#endif
// Other includes.
#ifdef __cpp_modules_ts
#ifdef __cpp_lib_modules_ts
import std.core;
import std.io;
#endif
import butl.path;
import butl.fdstream;
import butl.filesystem;
#else
#include <libbutl/path.mxx>
#include <libbutl/fdstream.mxx>
#include <libbutl/filesystem.mxx>
#endif
#undef NDEBUG
#include <cassert>
using namespace std;
using namespace butl;
static const char text1[] = "ABCDEF\nXYZ";
static const char text2[] = "12345\nDEF";
static const char text3[] = "XAB\r\n9";
static string
from_file (const path& f)
{
ifdstream ifs (f, fdopen_mode::binary);
string s (ifs.read_text ());
ifs.close (); // Not to miss failed close of the underlying file descriptor.
return s;
}
static void
to_file (const path& f, const char* s)
{
ofdstream ofs (f, fdopen_mode::binary);
ofs << s;
ofs.close ();
}
int
main ()
{
dir_path td (dir_path::temp_directory () / dir_path ("butl-cpfile"));
// 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_rmdir_r (td);
assert (try_mkdir (td) == mkdir_status::success);
path from (td / path ("from"));
path to (td / path ("to"));
// Copy empty file.
//
to_file (from, "");
cpfile (from, to);
assert (from_file (to) == "");
assert (try_rmfile (to) == rmfile_status::success);
// Check that content and permissions of newly created destination file are
// the same as that ones of the source file.
//
to_file (from, text1);
permissions p (path_permissions (from));
path_permissions (from, permissions::ru | permissions::xu);
cpfile (from, to, cpflags::none);
assert (from_file (to) == text1);
assert (path_permissions (to) == path_permissions (from));
// Check that permissions of an existent destination file stays intact if
// their overwrite is not requested.
//
path_permissions (to, p);
cpfile (from, to, cpflags::overwrite_content);
assert (from_file (to) == text1);
assert (path_permissions (to) == p);
// Check that permissions of an existent destination file get overwritten if
// requested.
//
cpfile (
from, to, cpflags::overwrite_content | cpflags::overwrite_permissions);
assert (from_file (to) == text1);
assert (path_permissions (to) == path_permissions (from));
path_permissions (to, p);
path_permissions (from, p);
try
{
cpfile (from, to, cpflags::none);
assert (false);
}
catch (const system_error&)
{
}
// Copy to the directory.
//
dir_path sd (td / dir_path ("sub"));
assert (try_mkdir (sd) == mkdir_status::success);
cpfile_into (from, sd, cpflags::none);
assert (from_file (sd / path ("from")) == text1);
// Check that a hard link to the destination file is preserved.
//
path hlink (td / path ("hlink"));
mkhardlink (to, hlink);
to_file (hlink, text1);
to_file (from, text2);
cpfile (from, to, cpflags::overwrite_content);
assert (from_file (hlink) == text2);
// Note that on Windows regular file symlinks may not be supported (see
// mksymlink() for details), so the following tests are allowed to fail
// with ENOSYS on Windows.
//
try
{
// Check that 'from' being a symbolic link is properly resolved.
//
path fslink (td / path ("fslink"));
mksymlink (from, fslink);
cpfile (fslink, to, cpflags::overwrite_content);
// Make sure 'to' is not a symbolic link to 'from' and from_file() just
// follows it.
//
assert (try_rmfile (from) == rmfile_status::success);
assert (from_file (to) == text2);
// Check that 'to' being a symbolic link is properly resolved.
//
path tslink (td / path ("tslink"));
mksymlink (to, tslink);
to_file (from, text3);
cpfile (from, tslink, cpflags::overwrite_content);
assert (from_file (to) == text3);
// Check that permissions are properly overwritten when 'to' is a symbolic
// link.
//
to_file (from, text1);
path_permissions (from, permissions::ru | permissions::xu);
cpfile (
from, tslink, cpflags::overwrite_content | cpflags::overwrite_permissions);
assert (from_file (to) == text1);
assert (path_permissions (to) == path_permissions (from));
path_permissions (to, p);
path_permissions (from, p);
// Check that no-overwrite file copy fails even if 'to' symlink points to
// non-existent file.
//
assert (try_rmfile (to) == rmfile_status::success);
try
{
cpfile (from, tslink, cpflags::none);
assert (false);
}
catch (const system_error&)
{
}
// Check that copy fail if 'from' symlink points to non-existent file. The
// std::system_error is thrown as cpfile() fails to obtain permissions for
// the 'from' symlink target.
//
try
{
cpfile (tslink, from, cpflags::none);
assert (false);
}
catch (const system_error&)
{
}
}
catch (const system_error& e)
{
#ifndef _WIN32
assert (false);
#else
assert (e.code ().category () == generic_category () &&
e.code ().value () == ENOSYS);
#endif
}
rmdir_r (td);
}
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