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e2e7c4d574
In a bunch of cases, this actually ends up simplifying the code as
to_number will handle something such as:
```
Optional<I> opt;
if constexpr (IsSigned<I>)
opt = view.to_int<I>();
else
opt = view.to_uint<I>();
```
For us.
The main goal here however is to have a single generic number conversion
API between all of the String classes.
70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, Zachary Penn <zack@sysdevs.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/CharacterTypes.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 <ctype.h>
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#include <signal.h>
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#include <stdlib.h>
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static void print_usage_and_exit()
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{
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warnln("usage: killall [-signal] process_name");
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exit(1);
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}
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static ErrorOr<int> kill_all(StringView process_name, unsigned const signum)
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{
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auto all_processes = TRY(Core::ProcessStatisticsReader::get_all());
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for (auto& process : all_processes.processes) {
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if (process.name == process_name) {
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if (auto maybe_error = Core::System::kill(process.pid, signum); maybe_error.is_error())
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warnln("{}", maybe_error.release_error());
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}
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}
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return 0;
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}
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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unsigned signum = SIGTERM;
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int name_argi = 1;
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if (arguments.argc != 2 && arguments.argc != 3)
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print_usage_and_exit();
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if (arguments.argc == 3) {
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name_argi = 2;
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if (arguments.argv[1][0] != '-')
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print_usage_and_exit();
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Optional<unsigned> number;
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if (is_ascii_alpha(arguments.argv[1][1])) {
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int value = getsignalbyname(&arguments.argv[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 = arguments.strings[1].substring_view(1).to_number<unsigned>();
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if (!number.has_value()) {
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warnln("'{}' is not a valid signal name or number", &arguments.argv[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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return kill_all(arguments.strings[name_argi], signum);
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}
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