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- /*
- * Copyright (c) 2021, Idan Horowitz <idan.horowitz@gmail.com>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #include <AK/LexicalPath.h>
- #include <LibCore/ArgsParser.h>
- #include <stdio.h>
- #include <string.h>
- #include <sys/stat.h>
- constexpr const char* default_template = "tmp.XXXXXXXXXX";
- static char* generate_random_filename(const char* pattern)
- {
- char* new_filename = strdup(pattern);
- int pattern_length = strlen(pattern);
- static constexpr char random_characters[] = "abcdefghijklmnopqrstuvwxyz0123456789";
- for (auto i = pattern_length - 1; i >= 0; --i) {
- if (pattern[i] != 'X')
- break;
- new_filename[i] = random_characters[(arc4random() % (sizeof(random_characters) - 1))];
- }
- return new_filename;
- }
- static char* make_temp(const char* pattern, bool directory, bool dry_run)
- {
- for (int i = 0; i < 100; ++i) {
- char* path = generate_random_filename(pattern);
- if (dry_run) {
- struct stat stat;
- auto rc = lstat(path, &stat);
- if (rc < 0 && errno == ENOENT)
- return path;
- } else if (directory) {
- if (!mkdir(path, 0700))
- return path;
- } else {
- auto fd = open(path, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
- if (fd >= 0) {
- close(fd);
- return path;
- }
- }
- free(path);
- }
- return nullptr;
- }
- int main(int argc, char** argv)
- {
- if (pledge("stdio rpath wpath cpath", nullptr)) {
- perror("pledge");
- return 1;
- }
- const char* file_template = nullptr;
- bool create_directory = false;
- bool dry_run = false;
- bool quiet = false;
- const char* target_directory = nullptr;
- Core::ArgsParser args_parser;
- args_parser.set_general_help("Create a temporary file or directory, safely, and print its name.");
- args_parser.add_positional_argument(file_template, "The template must contain at least 3 consecutive 'X's", "template", Core::ArgsParser::Required::No);
- args_parser.add_option(create_directory, "Create a temporary directory instead of a file", "directory", 'd');
- args_parser.add_option(dry_run, "Do not create anything, just print a unique name", "dry-run", 'u');
- args_parser.add_option(quiet, "Do not print diagnostics about file/directory creation failure", "quiet", 'q');
- args_parser.add_option(target_directory, "Create TEMPLATE relative to DIR", "tmpdir", 'p', "DIR");
- args_parser.parse(argc, argv);
- if (!target_directory) {
- if (file_template) { // If a custom template is specified we assume the target directory is the current directory
- target_directory = getcwd(nullptr, 0);
- } else {
- LexicalPath template_path(file_template);
- const char* env_directory = getenv("TMPDIR");
- target_directory = env_directory && *env_directory ? env_directory : "/tmp";
- }
- }
- if (!file_template) {
- file_template = default_template;
- }
- if (!String(file_template).find("XXX").has_value()) {
- if (!quiet)
- warnln("Too few X's in template {}", file_template);
- return 1;
- }
- LexicalPath target_path(String::formatted("{}/{}", target_directory, file_template));
- if (!target_path.is_valid()) {
- if (!quiet)
- warnln("Invalid template path {}", target_path.string().characters());
- return 1;
- }
- char* final_path = make_temp(target_path.string().characters(), create_directory, dry_run);
- if (!final_path) {
- if (!quiet) {
- if (create_directory)
- warnln("Failed to create directory via template {}", target_path.string().characters());
- else
- warnln("Failed to create file via template {}", target_path.string().characters());
- }
- return 1;
- }
- outln(final_path);
- free(final_path);
- return 0;
- }
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