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Kernel: Use TRY() in sys$readlink()

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This commit is contained in:
Andreas Kling 2021-09-05 17:55:43 +02:00
parent e0cf9152ca
commit 4e4b7c272c
Notes: sideshowbarker 2024-07-18 04:41:36 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/4e4b7c272c8
1 changed files with 6 additions and 16 deletions
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22
Kernel/Syscalls/readlink.cpp
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@ -16,27 +16,17 @@ KResultOr<FlatPtr> Process::sys$readlink(Userspace<const Syscall::SC_readlink_pa
REQUIRE_PROMISE(rpath);
auto params = TRY(copy_typed_from_user(user_params));
auto path = get_syscall_path_argument(params.path);
if (path.is_error())
return path.error();
auto result = VirtualFileSystem::the().open(path.value()->view(), O_RDONLY | O_NOFOLLOW_NOERROR, 0, current_directory());
if (result.is_error())
return result.error();
auto description = result.value();
auto path = TRY(get_syscall_path_argument(params.path));
auto description = TRY(VirtualFileSystem::the().open(path->view(), O_RDONLY | O_NOFOLLOW_NOERROR, 0, current_directory()));
if (!description->metadata().is_symlink())
return EINVAL;
auto contents = description->read_entire_file();
if (contents.is_error())
return contents.error();
auto& link_target = *contents.value();
auto size_to_copy = min(link_target.size(), params.buffer.size);
TRY(copy_to_user(params.buffer.data, link_target.data(), size_to_copy));
auto link_target = TRY(description->read_entire_file());
auto size_to_copy = min(link_target->size(), params.buffer.size);
TRY(copy_to_user(params.buffer.data, link_target->data(), size_to_copy));
// Note: we return the whole size here, not the copied size.
return link_target.size();
return link_target->size();
}
}