Function remove_nt5_impl

src/operations.cpp:1826–1878

remove() implementation for Windows XP and older

//! remove() implementation for Windows XP and older
bool remove_nt5_impl(path const& p, DWORD attrs, error_code* ec)
{
    const bool is_directory = (attrs & FILE_ATTRIBUTE_DIRECTORY) != 0;
    const bool is_read_only = (attrs & FILE_ATTRIBUTE_READONLY) != 0;
    if (is_read_only)
    {
        // RemoveDirectoryW and DeleteFileW do not allow to remove a read-only file, so we have to drop the attribute
        DWORD new_attrs = attrs & ~FILE_ATTRIBUTE_READONLY;
        BOOL res = ::SetFileAttributesW(p.c_str(), new_attrs);
        if (BOOST_UNLIKELY(!res))
        {
            DWORD err = ::GetLastError();
            if (!not_found_error(err))
                emit_error(err, p, ec, "boost::filesystem::remove");

            return false;
        }
    }

    BOOL res;
    if (!is_directory)
    {
        // DeleteFileW works for file symlinks by removing the symlink, not the target.
        res = ::DeleteFileW(p.c_str());
    }
    else
    {
        // RemoveDirectoryW works for symlinks and junctions by removing the symlink, not the target,
        // even if the target directory is not empty.
        // Note that unlike opening the directory with FILE_FLAG_DELETE_ON_CLOSE flag, RemoveDirectoryW
        // will fail if the directory is not empty.
        res = ::RemoveDirectoryW(p.c_str());
    }

    if (BOOST_UNLIKELY(!res))
    {
        DWORD err = ::GetLastError();
        if (!not_found_error(err))
        {
            if (is_read_only)
            {
                // Try to restore the read-only attribute
                ::SetFileAttributesW(p.c_str(), attrs);
            }

            emit_error(err, p, ec, "boost::filesystem::remove");
        }

        return false;
    }

    return true;
}

//! remove() by handle implementation for Windows Vista and newer
DWORD remove_nt6_by_handle(HANDLE handle, remove_impl_type impl)