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Kernel: kill() with signal 0 should not actually send anything

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Also kill() with pid 0 should send to everyone in the same process
group as the calling process.
This commit is contained in:
Andreas Kling 2020-01-03 02:01:45 +01:00
parent 8345f51a24
commit 005313df82
Notes: sideshowbarker 2024-07-19 10:24:33 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/005313df823
1 changed files with 12 additions and 7 deletions
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19
Kernel/Process.cpp
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@ -1740,7 +1740,8 @@ KResult Process::do_kill(Process& process, int signal)
kprintf("%s(%u) attempted to send SIGKILL to ring 0 process %s(%u)\n", name().characters(), m_pid, process.name().characters(), process.pid());
return KResult(-EPERM);
}
process.send_signal(signal, this);
if (signal != 0)
process.send_signal(signal, this);
return KSuccess;
}
@ -1781,17 +1782,21 @@ int Process::sys$kill(pid_t pid, int signal)
{
if (signal < 0 || signal >= 32)
return -EINVAL;
if (pid <= 0) {
if (pid == 0)
return do_killpg(m_pgid, signal);
if (pid < 0)
return do_killpg(-pid, signal);
}
if (pid == -1) {
// FIXME: Send to all processes.
ASSERT(pid != -1);
return -ENOTIMPL;
}
if (pid == m_pid) {
// FIXME: If we ignore this signal anyway, we don't need to block here, right?
current->send_signal(signal, this);
(void)current->block<Thread::SemiPermanentBlocker>(Thread::SemiPermanentBlocker::Reason::Signal);
if (signal == 0)
return 0;
if (!current->should_ignore_signal(signal)) {
current->send_signal(signal, this);
(void)current->block<Thread::SemiPermanentBlocker>(Thread::SemiPermanentBlocker::Reason::Signal);
}
return 0;
}
InterruptDisabler disabler;