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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Debug.h>
#include <Kernel/Process.h>
namespace Kernel {
KResultOr<siginfo_t> Process::do_waitid(idtype_t idtype, int id, int options)
{
KResultOr<siginfo_t> result = KResult(KSuccess);
if (Thread::current()->block<Thread::WaitBlocker>({}, options, idtype, id, result).was_interrupted())
return EINTR;
VERIFY(!result.is_error() || (options & WNOHANG) || result.error() != KSuccess);
return result;
}
KResultOr<FlatPtr> Process::sys$waitid(Userspace<const Syscall::SC_waitid_params*> user_params)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(proc);
Syscall::SC_waitid_params params;
if (!copy_from_user(¶ms, user_params))
return EFAULT;
switch (params.idtype) {
case P_ALL:
case P_PID:
case P_PGID:
break;
default:
return EINVAL;
}
dbgln_if(PROCESS_DEBUG, "sys$waitid({}, {}, {}, {})", params.idtype, params.id, params.infop, params.options);
auto siginfo_or_error = do_waitid(static_cast<idtype_t>(params.idtype), params.id, params.options);
if (siginfo_or_error.is_error())
return siginfo_or_error.error();
if (!copy_to_user(params.infop, &siginfo_or_error.value()))
return EFAULT;
return 0;
}
}
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