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https://github.com/SerenityOS/serenity
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2a78bf8596
The Process::Handler type has KResultOr<FlatPtr> as its return type. Using a different return type with an equally-sized template parameter sort of works but breaks once that condition is no longer true, e.g. for KResultOr<int> on x86_64. Ideally the syscall handlers would also take FlatPtrs as their args so we can get rid of the reinterpret_cast for the function pointer but I didn't quite feel like cleaning that up as well.
72 lines
2 KiB
C++
72 lines
2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Types.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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KResultOr<FlatPtr> Process::sys$getpid()
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{
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REQUIRE_PROMISE(stdio);
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return pid().value();
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}
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KResultOr<FlatPtr> Process::sys$getppid()
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{
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REQUIRE_PROMISE(stdio);
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return m_ppid.value();
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}
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KResultOr<FlatPtr> Process::sys$get_process_name(Userspace<char*> buffer, size_t buffer_size)
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{
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REQUIRE_PROMISE(stdio);
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if (m_name.length() + 1 > buffer_size)
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return ENAMETOOLONG;
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if (!copy_to_user(buffer, m_name.characters(), m_name.length() + 1))
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return EFAULT;
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return 0;
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}
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KResultOr<FlatPtr> Process::sys$set_process_name(Userspace<const char*> user_name, size_t user_name_length)
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{
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REQUIRE_PROMISE(proc);
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if (user_name_length > 256)
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return ENAMETOOLONG;
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auto name = copy_string_from_user(user_name, user_name_length);
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if (name.is_null())
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return EFAULT;
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// Empty and whitespace-only names only exist to confuse users.
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if (name.is_whitespace())
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return EINVAL;
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m_name = move(name);
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return 0;
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}
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KResultOr<FlatPtr> Process::sys$set_coredump_metadata(Userspace<const Syscall::SC_set_coredump_metadata_params*> user_params)
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{
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Syscall::SC_set_coredump_metadata_params params;
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if (!copy_from_user(¶ms, user_params))
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return EFAULT;
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if (params.key.length == 0 || params.key.length > 16 * KiB)
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return EINVAL;
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if (params.value.length > 16 * KiB)
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return EINVAL;
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auto copied_key = copy_string_from_user(params.key.characters, params.key.length);
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if (copied_key.is_null())
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return EFAULT;
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auto copied_value = copy_string_from_user(params.value.characters, params.value.length);
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if (copied_value.is_null())
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return EFAULT;
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if (!m_coredump_metadata.contains(copied_key) && m_coredump_metadata.size() >= 16)
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return EFAULT;
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m_coredump_metadata.set(move(copied_key), move(copied_value));
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return 0;
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}
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}
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