mirror of https://github.com/OpenTTD/OpenTTD.git
Codechange: Remove support for links in tar files. (#12571)
This was a feature to support the original 32bpp sprite system and is no longer relevant.
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99b74c1064
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@ -68,9 +68,6 @@ std::vector<Searchpath> _valid_searchpaths;
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std::array<TarList, NUM_SUBDIRS> _tar_list;
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std::array<TarList, NUM_SUBDIRS> _tar_list;
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TarFileList _tar_filelist[NUM_SUBDIRS];
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TarFileList _tar_filelist[NUM_SUBDIRS];
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typedef std::map<std::string, std::string> TarLinkList;
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static TarLinkList _tar_linklist[NUM_SUBDIRS]; ///< List of directory links
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/**
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/**
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* Checks whether the given search path is a valid search path
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* Checks whether the given search path is a valid search path
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* @param sp the search path to check
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* @param sp the search path to check
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@ -298,17 +295,6 @@ FILE *FioFOpenFile(const std::string &filename, const char *mode, Subdirectory s
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first = false;
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first = false;
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}
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}
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/* Resolve ONE directory link */
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for (const auto &link : _tar_linklist[subdir]) {
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const std::string &src = link.first;
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size_t len = src.length();
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if (resolved_name.length() >= len && resolved_name[len - 1] == PATHSEPCHAR && src.compare(0, len, resolved_name, 0, len) == 0) {
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/* Apply link */
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resolved_name.replace(0, len, link.second);
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break; // Only resolve one level
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}
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}
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TarFileList::iterator it = _tar_filelist[subdir].find(resolved_name);
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TarFileList::iterator it = _tar_filelist[subdir].find(resolved_name);
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if (it != _tar_filelist[subdir].end()) {
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if (it != _tar_filelist[subdir].end()) {
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f = FioFOpenFileTar(it->second, filesize);
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f = FioFOpenFileTar(it->second, filesize);
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@ -378,27 +364,6 @@ void AppendPathSeparator(std::string &buf)
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if (buf.back() != PATHSEPCHAR) buf.push_back(PATHSEPCHAR);
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if (buf.back() != PATHSEPCHAR) buf.push_back(PATHSEPCHAR);
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}
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}
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static void TarAddLink(const std::string &srcParam, const std::string &destParam, Subdirectory subdir)
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{
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std::string src = srcParam;
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std::string dest = destParam;
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/* Tar internals assume lowercase */
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std::transform(src.begin(), src.end(), src.begin(), tolower);
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std::transform(dest.begin(), dest.end(), dest.begin(), tolower);
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TarFileList::iterator dest_file = _tar_filelist[subdir].find(dest);
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if (dest_file != _tar_filelist[subdir].end()) {
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/* Link to file. Process the link like the destination file. */
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_tar_filelist[subdir].insert(TarFileList::value_type(src, dest_file->second));
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} else {
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/* Destination file not found. Assume 'link to directory'
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* Append PATHSEPCHAR to 'src' and 'dest' if needed */
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const std::string src_path = ((*src.rbegin() == PATHSEPCHAR) ? src : src + PATHSEPCHAR);
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const std::string dst_path = (dest.length() == 0 ? "" : ((*dest.rbegin() == PATHSEPCHAR) ? dest : dest + PATHSEPCHAR));
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_tar_linklist[subdir].insert(TarLinkList::value_type(src_path, dst_path));
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}
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}
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/**
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/**
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* Simplify filenames from tars.
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* Simplify filenames from tars.
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* Replace '/' by #PATHSEPCHAR, and force 'name' to lowercase.
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* Replace '/' by #PATHSEPCHAR, and force 'name' to lowercase.
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@ -527,8 +492,6 @@ bool TarScanner::AddFile(const std::string &filename, size_t, [[maybe_unused]] c
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std::string filename_base = std::filesystem::path(filename).filename().string();
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std::string filename_base = std::filesystem::path(filename).filename().string();
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SimplifyFileName(filename_base);
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SimplifyFileName(filename_base);
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TarLinkList links; ///< Temporary list to collect links
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TarHeader th;
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TarHeader th;
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size_t num = 0, pos = 0;
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size_t num = 0, pos = 0;
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@ -597,33 +560,9 @@ bool TarScanner::AddFile(const std::string &filename, size_t, [[maybe_unused]] c
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case '1': // hard links
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case '1': // hard links
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case '2': { // symbolic links
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case '2': { // symbolic links
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/* Copy the destination of the link in a safe way at the end of 'linkname' */
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std::string link = ExtractString(th.linkname);
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std::string link = ExtractString(th.linkname);
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if (name.empty() || link.empty()) break;
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Debug(misc, 5, "Ignoring link in tar: {} -> {}", name, link);
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/* Convert to lowercase and our PATHSEPCHAR */
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SimplifyFileName(name);
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SimplifyFileName(link);
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/* Only allow relative links */
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if (link[0] == PATHSEPCHAR) {
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Debug(misc, 5, "Ignoring absolute link in tar: {} -> {}", name, link);
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break;
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}
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/* Process relative path.
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* Note: The destination of links must not contain any directory-links. */
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std::string dest = (std::filesystem::path(name).remove_filename() /= link).lexically_normal().string();
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if (dest[0] == PATHSEPCHAR || dest.starts_with("..")) {
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Debug(misc, 5, "Ignoring link pointing outside of data directory: {} -> {}", name, link);
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break;
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}
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/* Store links in temporary list */
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Debug(misc, 6, "Found link in tar: {} -> {}", name, dest);
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links.insert(TarLinkList::value_type(filename_base + PATHSEPCHAR + name, filename_base + PATHSEPCHAR + dest));
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break;
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break;
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}
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}
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@ -654,19 +593,6 @@ bool TarScanner::AddFile(const std::string &filename, size_t, [[maybe_unused]] c
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Debug(misc, 4, "Found tar '{}' with {} new files", filename, num);
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Debug(misc, 4, "Found tar '{}' with {} new files", filename, num);
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fclose(f);
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fclose(f);
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/* Resolve file links and store directory links.
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* We restrict usage of links to two cases:
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* 1) Links to directories:
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* Both the source path and the destination path must NOT contain any further links.
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* When resolving files at most one directory link is resolved.
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* 2) Links to files:
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* The destination path must NOT contain any links.
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* The source path may contain one directory link.
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*/
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for (auto &it : links) {
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TarAddLink(it.first, it.second, this->subdir);
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}
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return true;
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return true;
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}
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}
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