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110 lines
4.1 KiB
C++
110 lines
4.1 KiB
C++
/*
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* Copyright (c) 2022, Maxwell Trussell <maxtrussell@gmail.com>
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* Copyright (c) 2023, Tim Ledbetter <timledbetter@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Format.h>
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#include <AK/Vector.h>
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#include <LibCore/Account.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 <LibRegex/Regex.h>
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#include <LibRegex/RegexOptions.h>
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#include <signal.h>
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#include <sys/types.h>
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ErrorOr<int> serenity_main(Main::Arguments args)
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{
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TRY(Core::System::pledge("stdio proc rpath"));
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TRY(Core::System::unveil("/sys/kernel/processes", "r"));
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TRY(Core::System::unveil("/etc/group", "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 display_number_of_matches;
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bool case_insensitive = false;
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bool echo = false;
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bool exact_match = false;
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StringView pattern;
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HashTable<uid_t> uids_to_filter_by;
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int signal = SIGTERM;
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Core::ArgsParser args_parser;
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args_parser.add_option(display_number_of_matches, "Display the number of matching processes", "count", 'c');
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args_parser.add_option(case_insensitive, "Make matches case-insensitive", "ignore-case", 'i');
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args_parser.add_option(echo, "Display what is killed", "echo", 'e');
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args_parser.add_option(signal, "Signal number to send", "signal", 's', "number");
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args_parser.add_option(Core::ArgsParser::Option {
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.argument_mode = Core::ArgsParser::OptionArgumentMode::Required,
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.help_string = "Select only processes whose UID is in the given comma-separated list. Login name or numerical user ID may be used",
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.long_name = "uid",
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.short_name = 'U',
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.value_name = "uid-list",
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.accept_value = [&uids_to_filter_by](StringView comma_separated_users) {
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for (auto user_string : comma_separated_users.split_view(',')) {
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auto maybe_uid = user_string.to_uint<uid_t>();
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if (maybe_uid.has_value()) {
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uids_to_filter_by.set(maybe_uid.value());
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} else {
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auto maybe_account = Core::Account::from_name(user_string, Core::Account::Read::PasswdOnly);
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if (maybe_account.is_error()) {
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warnln("Could not find user '{}': {}", user_string, maybe_account.error());
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return false;
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}
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uids_to_filter_by.set(maybe_account.release_value().uid());
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}
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}
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return true;
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},
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});
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args_parser.add_option(exact_match, "Select only processes whose names match the given pattern exactly", "exact", 'x');
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args_parser.add_positional_argument(pattern, "Process name to search for", "process-name");
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args_parser.parse(args);
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auto all_processes = TRY(Core::ProcessStatisticsReader::get_all());
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PosixOptions options {};
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if (case_insensitive) {
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options |= PosixFlags::Insensitive;
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}
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StringBuilder exact_pattern_builder;
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if (exact_match) {
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exact_pattern_builder.appendff("^({})$", pattern);
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pattern = exact_pattern_builder.string_view();
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}
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Regex<PosixExtended> re(pattern, options);
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if (re.parser_result.error != regex::Error::NoError) {
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return 1;
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}
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Vector<Core::ProcessStatistics> matched_processes;
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for (auto& process : all_processes.processes) {
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auto result = re.match(process.name, PosixFlags::Global);
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if (result.success) {
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if (!uids_to_filter_by.is_empty() && !uids_to_filter_by.contains(process.uid))
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continue;
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matched_processes.append(process);
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}
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}
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for (auto& process : matched_processes) {
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auto result = Core::System::kill(process.pid, signal);
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if (result.is_error())
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warnln("Killing pid {} failed. {}", process.pid, result.release_error());
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else if (echo)
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outln("{} killed (pid {})", process.name, process.pid);
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}
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if (display_number_of_matches)
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outln("{}", matched_processes.size());
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return matched_processes.is_empty() ? 1 : 0;
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}
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