jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <LibCore/ArgsParser.h>
8#include <LibCore/DeprecatedFile.h>
9#include <LibCore/MappedFile.h>
10#include <LibCore/System.h>
11#include <LibELF/Image.h>
12#include <LibMain/Main.h>
13
14static ErrorOr<bool> is_dynamically_linked_executable(StringView filename)
15{
16 auto maybe_executable = Core::DeprecatedFile::resolve_executable_from_environment(filename);
17
18 if (!maybe_executable.has_value())
19 return ENOENT;
20
21 auto file = TRY(Core::MappedFile::map(maybe_executable.release_value()));
22 ELF::Image elf_image(file->bytes());
23 return elf_image.is_dynamic();
24}
25
26ErrorOr<int> serenity_main(Main::Arguments arguments)
27{
28 DeprecatedString promises;
29 Vector<StringView> command;
30 bool add_promises_for_dynamic_linker;
31
32 Core::ArgsParser args_parser;
33 args_parser.add_option(promises, "Space-separated list of pledge promises", "promises", 'p', "promises");
34 args_parser.add_option(add_promises_for_dynamic_linker, "Add temporary promises for dynamic linker", "dynamic-linker-promises", 'd');
35 args_parser.add_positional_argument(command, "Command to execute", "command");
36 args_parser.parse(arguments);
37
38 if (add_promises_for_dynamic_linker && TRY(is_dynamically_linked_executable(command[0]))) {
39 auto constexpr loader_promises = "stdio rpath prot_exec"sv;
40 MUST(Core::System::setenv("_LOADER_PLEDGE_PROMISES"sv, loader_promises, true));
41 MUST(Core::System::setenv("_LOADER_MAIN_PROGRAM_PLEDGE_PROMISES"sv, promises, true));
42 promises = DeprecatedString::formatted("{} {}", promises, loader_promises);
43 }
44
45 TRY(Core::System::pledge(StringView(), promises));
46 TRY(Core::System::exec(command[0], command.span(), Core::System::SearchInPath::Yes));
47 return 0;
48}