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ac71775de5
This makes it a lot easier to return errors since we no longer have to worry about negating EFOO errors and can just return them flat.
70 lines
2.6 KiB
C++
70 lines
2.6 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <Kernel/Debug.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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KResultOr<siginfo_t> Process::do_waitid(idtype_t idtype, int id, int options)
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{
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KResultOr<siginfo_t> result = KResult(KSuccess);
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if (Thread::current()->block<Thread::WaitBlocker>({}, options, idtype, id, result).was_interrupted())
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return EINTR;
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VERIFY(!result.is_error() || (options & WNOHANG) || result.error() != KSuccess);
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return result;
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}
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KResultOr<pid_t> Process::sys$waitid(Userspace<const Syscall::SC_waitid_params*> user_params)
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{
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REQUIRE_PROMISE(proc);
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Syscall::SC_waitid_params params;
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if (!copy_from_user(¶ms, user_params))
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return EFAULT;
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switch (params.idtype) {
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case P_ALL:
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case P_PID:
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case P_PGID:
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break;
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default:
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return EINVAL;
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}
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dbgln_if(PROCESS_DEBUG, "sys$waitid({}, {}, {}, {})", params.idtype, params.id, params.infop, params.options);
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auto siginfo_or_error = do_waitid(static_cast<idtype_t>(params.idtype), params.id, params.options);
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if (siginfo_or_error.is_error())
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return siginfo_or_error.error();
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if (!copy_to_user(params.infop, &siginfo_or_error.value()))
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return EFAULT;
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return 0;
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}
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}
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