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Kernel: Custody::absolute_path() => try_create_absolute_path()

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This converts most users of Custody::absolute_path() to use the new
try_create_absolute_path() API, and return ENOMEM if the KString
allocation fails.
This commit is contained in:
Max Wipfli 2021-07-06 12:58:03 +02:00 • committed by Andreas Kling
parent 0f8a6e574c
commit d5722eab36
4 changed files with 32 additions and 15 deletions
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8
Kernel/Syscalls/realpath.cpp
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@ -27,11 +27,13 @@ KResultOr<FlatPtr> Process::sys$realpath(Userspace<const Syscall::SC_realpath_pa
if (custody_or_error.is_error())
return custody_or_error.error();
auto& custody = custody_or_error.value();
auto absolute_path = custody->absolute_path();
auto absolute_path = custody->try_create_absolute_path();
if (!absolute_path)
return ENOMEM;
size_t ideal_size = absolute_path.length() + 1;
size_t ideal_size = absolute_path->length() + 1;
auto size_to_copy = min(ideal_size, params.buffer.size);
if (!copy_to_user(params.buffer.data, absolute_path.characters(), size_to_copy))
if (!copy_to_user(params.buffer.data, absolute_path->characters(), size_to_copy))
return EFAULT;
// Note: we return the whole size here, not the copied size.
return ideal_size;