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3f3f45580a
Each of these strings would previously rely on StringView's char const* constructor overload, which would call __builtin_strlen on the string. Since we now have operator ""sv, we can replace these with much simpler versions. This opens the door to being able to remove StringView(char const*). No functional changes.
77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/String.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/ProcessStatisticsReader.h>
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#include <LibCore/System.h>
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#include <LibMain/Main.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static ErrorOr<int> pid_of(String const& process_name, bool single_shot, bool omit_pid, pid_t pid)
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{
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bool displayed_at_least_one = false;
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auto all_processes = Core::ProcessStatisticsReader::get_all();
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if (!all_processes.has_value())
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return 1;
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for (auto& it : all_processes.value().processes) {
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if (it.name == process_name) {
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if (!omit_pid || it.pid != pid) {
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out(displayed_at_least_one ? " {}"sv : "{}"sv, it.pid);
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displayed_at_least_one = true;
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if (single_shot)
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break;
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}
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}
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}
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if (displayed_at_least_one)
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outln();
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return 0;
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}
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ErrorOr<int> serenity_main(Main::Arguments args)
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{
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TRY(Core::System::pledge("stdio rpath"));
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TRY(Core::System::unveil("/proc/all", "r"));
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TRY(Core::System::unveil("/etc/passwd", "r"));
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TRY(Core::System::unveil(nullptr, nullptr));
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bool single_shot = false;
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char const* omit_pid_value = nullptr;
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char const* process_name = nullptr;
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Core::ArgsParser args_parser;
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args_parser.add_option(single_shot, "Only return one pid", nullptr, 's');
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args_parser.add_option(omit_pid_value, "Omit the given PID, or the parent process if the special value %PPID is passed", nullptr, 'o', "pid");
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args_parser.add_positional_argument(process_name, "Process name to search for", "process-name");
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args_parser.parse(args);
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pid_t pid_to_omit = 0;
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if (omit_pid_value) {
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if (!strcmp(omit_pid_value, "%PPID")) {
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pid_to_omit = getppid();
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} else {
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auto number = StringView { omit_pid_value, strlen(omit_pid_value) }.to_uint();
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if (!number.has_value()) {
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warnln("Invalid value for -o");
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args_parser.print_usage(stderr, args.argv[0]);
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return 1;
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}
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pid_to_omit = number.value();
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}
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}
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return pid_of(process_name, single_shot, omit_pid_value != nullptr, pid_to_omit);
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}
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