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16aeb8b51d
The previous implementation used argv and LibC to parse arguments, it now uses the Arguments.strings interface to do so.
79 lines
1.8 KiB
C++
79 lines
1.8 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/Optional.h>
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#include <AK/String.h>
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#include <LibCore/System.h>
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#include <LibMain/Main.h>
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#include <ctype.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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static void print_usage_and_exit()
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{
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warnln("usage: kill [-signal] <PID>");
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exit(1);
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}
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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TRY(Core::System::pledge("stdio proc"));
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int argc = arguments.argc;
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auto strings = arguments.strings;
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if (argc == 2 && strings[1] == "-l") {
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for (size_t i = 0; i < NSIG; ++i) {
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if (i && !(i % 5))
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outln("");
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out("{:2}) {:10}", i, getsignalname(i));
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}
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outln("");
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return 0;
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}
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if (argc != 2 && argc != 3)
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print_usage_and_exit();
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unsigned signum = SIGTERM;
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int pid_argi = 1;
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if (argc == 3) {
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pid_argi = 2;
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if (strings[1][0] != '-')
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print_usage_and_exit();
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Optional<unsigned> number;
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if (isalpha(strings[1][1])) {
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int value = getsignalbyname(&strings[1][1]);
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if (value >= 0 && value < NSIG)
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number = value;
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}
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if (!number.has_value())
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number = strings[1].substring_view(1, 1).to_uint();
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if (!number.has_value()) {
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warnln("'{}' is not a valid signal name or number", &strings[1][1]);
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return 2;
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}
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signum = number.value();
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}
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auto pid_opt = strings[pid_argi].to_int();
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if (!pid_opt.has_value()) {
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warnln("'{}' is not a valid PID", strings[pid_argi]);
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return 3;
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}
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pid_t pid = pid_opt.value();
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int rc = kill(pid, signum);
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if (rc < 0)
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perror("kill");
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return 0;
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}
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