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25 lines
658 B
C++
25 lines
658 B
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 <Kernel/FileSystem/OpenFileDescription.h>
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#include <Kernel/Tasks/Process.h>
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namespace Kernel {
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ErrorOr<FlatPtr> Process::sys$lseek(int fd, Userspace<off_t*> userspace_offset, int whence)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this);
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TRY(require_promise(Pledge::stdio));
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auto description = TRY(open_file_description(fd));
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off_t offset;
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TRY(copy_from_user(&offset, userspace_offset));
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auto seek_result = TRY(description->seek(offset, whence));
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TRY(copy_to_user(userspace_offset, &seek_result));
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return 0;
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}
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}
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