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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Optional.h>
#include <AK/String.h>
#include <ctype.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static void print_usage_and_exit()
{
warnln("usage: kill [-signal] <PID>");
exit(1);
}
int main(int argc, char** argv)
{
if (pledge("stdio proc", nullptr) < 0) {
perror("pledge");
return 1;
}
if (argc == 2 && !strcmp(argv[1], "-l")) {
for (size_t i = 0; i < NSIG; ++i) {
if (i && !(i % 5))
outln("");
out("{:2}) {:10}", i, getsignalname(i));
}
outln("");
return 0;
}
if (argc != 2 && argc != 3)
print_usage_and_exit();
unsigned signum = SIGTERM;
int pid_argi = 1;
if (argc == 3) {
pid_argi = 2;
if (argv[1][0] != '-')
print_usage_and_exit();
Optional<unsigned> number;
if (isalpha(argv[1][1])) {
int value = getsignalbyname(&argv[1][1]);
if (value >= 0 && value < NSIG)
number = value;
}
if (!number.has_value())
number = StringView(&argv[1][1]).to_uint();
if (!number.has_value()) {
warnln("'{}' is not a valid signal name or number", &argv[1][1]);
return 2;
}
signum = number.value();
}
auto pid_opt = String(argv[pid_argi]).to_int();
if (!pid_opt.has_value()) {
warnln("'{}' is not a valid PID", argv[pid_argi]);
return 3;
}
pid_t pid = pid_opt.value();
int rc = kill(pid, signum);
if (rc < 0)
perror("kill");
return 0;
}
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