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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/DeprecatedString.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/ProcessStatisticsReader.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
static ErrorOr<int> pid_of(DeprecatedString const& process_name, bool single_shot, bool omit_pid, pid_t pid)
{
bool displayed_at_least_one = false;
auto all_processes = TRY(Core::ProcessStatisticsReader::get_all());
for (auto& it : all_processes.processes) {
if (it.name == process_name) {
if (!omit_pid || it.pid != pid) {
out(displayed_at_least_one ? " {}"sv : "{}"sv, it.pid);
displayed_at_least_one = true;
if (single_shot)
break;
}
}
}
if (displayed_at_least_one)
outln();
return 0;
}
ErrorOr<int> serenity_main(Main::Arguments args)
{
TRY(Core::System::pledge("stdio rpath"));
TRY(Core::System::unveil("/sys/kernel/processes", "r"));
TRY(Core::System::unveil("/etc/passwd", "r"));
TRY(Core::System::unveil(nullptr, nullptr));
bool single_shot = false;
char const* omit_pid_value = nullptr;
char const* process_name = nullptr;
Core::ArgsParser args_parser;
args_parser.add_option(single_shot, "Only return one pid", nullptr, 's');
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");
args_parser.add_positional_argument(process_name, "Process name to search for", "process-name");
args_parser.parse(args);
pid_t pid_to_omit = 0;
if (omit_pid_value) {
if (!strcmp(omit_pid_value, "%PPID")) {
pid_to_omit = getppid();
} else {
auto number = StringView { omit_pid_value, strlen(omit_pid_value) }.to_uint();
if (!number.has_value()) {
warnln("Invalid value for -o");
args_parser.print_usage(stderr, args.argv[0]);
return 1;
}
pid_to_omit = number.value();
}
}
return pid_of(process_name, single_shot, omit_pid_value != nullptr, pid_to_omit);
}
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