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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. :^)
67 lines
1.8 KiB
C++
67 lines
1.8 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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ErrorOr<FlatPtr> Process::sys$getpid()
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this)
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REQUIRE_PROMISE(stdio);
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return pid().value();
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}
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ErrorOr<FlatPtr> Process::sys$getppid()
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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REQUIRE_PROMISE(stdio);
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return m_protected_values.ppid.value();
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}
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ErrorOr<FlatPtr> Process::sys$get_process_name(Userspace<char*> buffer, size_t buffer_size)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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REQUIRE_PROMISE(stdio);
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if (m_name->length() + 1 > buffer_size)
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return ENAMETOOLONG;
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TRY(copy_to_user(buffer, m_name->characters(), m_name->length() + 1));
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return 0;
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}
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ErrorOr<FlatPtr> Process::sys$set_process_name(Userspace<const char*> user_name, size_t user_name_length)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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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 = TRY(try_copy_kstring_from_user(user_name, user_name_length));
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// Empty and whitespace-only names only exist to confuse users.
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if (name->view().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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ErrorOr<FlatPtr> Process::sys$set_coredump_metadata(Userspace<const Syscall::SC_set_coredump_metadata_params*> user_params)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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auto params = TRY(copy_typed_from_user(user_params));
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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 key = TRY(try_copy_kstring_from_user(params.key));
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auto value = TRY(try_copy_kstring_from_user(params.value));
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TRY(set_coredump_property(move(key), move(value)));
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return 0;
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}
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}
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