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Basic ^C interrupt implementation.

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For testing, I made cat put itself into a new process group.
This should eventually be done by sh between fork() and exec().
This commit is contained in:
Andreas Kling 2018-11-02 14:06:48 +01:00
parent 621217ffeb
commit 10b666f69a
11 changed files with 94 additions and 38 deletions
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27
Kernel/Process.cpp
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@ -139,6 +139,15 @@ static void forEachProcess(Callback callback)
}
}
void Process::for_each_in_pgrp(pid_t pgid, Function<void(Process&)> callback)
{
ASSERT_INTERRUPTS_DISABLED();
for (auto* process = s_processes->head(); process; process = process->next()) {
if (process->pgid() == pgid)
callback(*process);
}
}
Vector<Process*> Process::allProcesses()
{
InterruptDisabler disabler;
@ -575,10 +584,10 @@ void Process::sys$exit(int status)
switchNow();
}
void Process::murder(int signal)
void Process::send_signal(int signal, Process* sender)
{
ASSERT_INTERRUPTS_DISABLED();
bool wasCurrent = current == this;
bool wasCurrent = current == sender;
set_state(Exiting);
s_processes->remove(this);
@ -587,7 +596,7 @@ void Process::murder(int signal)
if (wasCurrent) {
kprintf("Current process committing suicide!\n");
if (!scheduleNewProcess()) {
kprintf("Process::murder: Failed to schedule a new process :(\n");
kprintf("Process::send_signal: Failed to schedule a new process :(\n");
HANG;
}
}
@ -1014,9 +1023,8 @@ int Process::sys$uname(utsname* buf)
return 0;
}
int Process::sys$kill(pid_t pid, int sig)
int Process::sys$kill(pid_t pid, int signal)
{
(void) sig;
if (pid == 0) {
// FIXME: Send to same-group processes.
ASSERT(pid != 0);
@ -1030,13 +1038,8 @@ int Process::sys$kill(pid_t pid, int sig)
auto* peer = Process::fromPID(pid);
if (!peer)
return -ESRCH;
if (sig == SIGKILL) {
peer->murder(SIGKILL);
return 0;
} else {
ASSERT_NOT_REACHED();
}
return -1;
peer->send_signal(signal, this);
return 0;
}
int Process::sys$sleep(unsigned seconds)