mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-22 10:59:51 +03:00
79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Variant.h>
|
|
#include <Kernel/Debug.h>
|
|
#include <Kernel/Process.h>
|
|
|
|
namespace Kernel {
|
|
|
|
ErrorOr<siginfo_t> Process::do_waitid(Variant<Empty, NonnullRefPtr<Process>, NonnullRefPtr<ProcessGroup>> waitee, int options)
|
|
{
|
|
ErrorOr<siginfo_t> result = siginfo_t {};
|
|
if (Thread::current()->block<Thread::WaitBlocker>({}, options, move(waitee), result).was_interrupted())
|
|
return EINTR;
|
|
VERIFY(!result.is_error() || (options & WNOHANG));
|
|
return result;
|
|
}
|
|
|
|
ErrorOr<FlatPtr> Process::sys$waitid(Userspace<const Syscall::SC_waitid_params*> user_params)
|
|
{
|
|
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
|
|
REQUIRE_PROMISE(proc);
|
|
auto params = TRY(copy_typed_from_user(user_params));
|
|
|
|
Variant<Empty, NonnullRefPtr<Process>, NonnullRefPtr<ProcessGroup>> waitee;
|
|
switch (params.idtype) {
|
|
case P_ALL:
|
|
break;
|
|
case P_PID: {
|
|
auto waitee_process = Process::from_pid(params.id);
|
|
if (!waitee_process)
|
|
return ECHILD;
|
|
bool waitee_is_child = waitee_process->ppid() == Process::current().pid();
|
|
bool waitee_is_our_tracee = waitee_process->has_tracee_thread(Process::current().pid());
|
|
if (!waitee_is_child && !waitee_is_our_tracee)
|
|
return ECHILD;
|
|
waitee = waitee_process.release_nonnull();
|
|
break;
|
|
}
|
|
case P_PGID: {
|
|
auto waitee_group = ProcessGroup::from_pgid(params.id);
|
|
if (!waitee_group) {
|
|
return ECHILD;
|
|
}
|
|
waitee = waitee_group.release_nonnull();
|
|
break;
|
|
}
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
|
|
dbgln_if(PROCESS_DEBUG, "sys$waitid({}, {}, {}, {})", params.idtype, params.id, params.infop, params.options);
|
|
|
|
auto siginfo = TRY(do_waitid(move(waitee), params.options));
|
|
TRY(copy_to_user(params.infop, &siginfo));
|
|
return 0;
|
|
}
|
|
|
|
}
|