mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-21 10:19:03 +03:00
597ff9ec93
The kill system call accepts negative pids, as they
have special meaning:
pid == -1 means all processes the calling process has access to.
pid < -1 means every process who's process group ID is -pid.
I don't see any reason why the user space program should mask this.
72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <AK/String.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
static void print_usage_and_exit()
|
|
{
|
|
printf("usage: kill [-signal] <PID>\n");
|
|
exit(1);
|
|
}
|
|
|
|
int main(int argc, char** argv)
|
|
{
|
|
if (pledge("stdio proc", nullptr) < 0) {
|
|
perror("pledge");
|
|
return 1;
|
|
}
|
|
|
|
if (argc != 2 && argc != 3)
|
|
print_usage_and_exit();
|
|
bool ok;
|
|
unsigned signum = SIGTERM;
|
|
int pid_argi = 1;
|
|
if (argc == 3) {
|
|
pid_argi = 2;
|
|
if (argv[1][0] != '-')
|
|
print_usage_and_exit();
|
|
signum = String(&argv[1][1]).to_uint(ok);
|
|
if (!ok) {
|
|
printf("'%s' is not a valid signal number\n", &argv[1][1]);
|
|
return 2;
|
|
}
|
|
}
|
|
pid_t pid = String(argv[pid_argi]).to_int(ok);
|
|
if (!ok) {
|
|
printf("'%s' is not a valid PID\n", argv[pid_argi]);
|
|
return 3;
|
|
}
|
|
|
|
int rc = kill(pid, signum);
|
|
if (rc < 0)
|
|
perror("kill");
|
|
return 0;
|
|
}
|