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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.
44 lines
1.3 KiB
C++
44 lines
1.3 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/StringView.h>
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#include <Kernel/FileSystem/VirtualFileSystem.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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KResultOr<FlatPtr> Process::sys$link(Userspace<const Syscall::SC_link_params*> user_params)
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{
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REQUIRE_PROMISE(cpath);
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Syscall::SC_link_params params;
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if (!copy_from_user(¶ms, user_params))
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return EFAULT;
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auto old_path = copy_string_from_user(params.old_path);
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if (old_path.is_null())
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return EFAULT;
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auto new_path = copy_string_from_user(params.new_path);
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if (new_path.is_null())
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return EFAULT;
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return VFS::the().link(old_path, new_path, current_directory());
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}
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KResultOr<FlatPtr> Process::sys$symlink(Userspace<const Syscall::SC_symlink_params*> user_params)
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{
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REQUIRE_PROMISE(cpath);
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Syscall::SC_symlink_params params;
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if (!copy_from_user(¶ms, user_params))
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return EFAULT;
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auto target = get_syscall_path_argument(params.target);
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if (target.is_error())
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return target.error();
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auto linkpath = get_syscall_path_argument(params.linkpath);
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if (linkpath.is_error())
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return linkpath.error();
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return VFS::the().symlink(target.value()->view(), linkpath.value()->view(), current_directory());
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}
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}
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