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Kernel: Implement Process::custody_for_dirfd

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This allows deduplicating a bunch of code that has to work with
POSIX' *at syscall semantics.
This commit is contained in:
sin-ack 2022-10-01 11:28:27 +00:00 • committed by Andrew Kaster
parent 5b335e7fba
commit 5c1d5ed51d
Notes: sideshowbarker 2024-07-17 03:24:13 +09:00
2 changed files with 13 additions and 0 deletions
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11
Kernel/Process.cpp
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@ -1100,4 +1100,15 @@ RefPtr<Custody const> Process::executable() const
return m_executable.with([](auto& executable) { return executable; }); return m_executable.with([](auto& executable) { return executable; });
} }
ErrorOr<NonnullRefPtr<Custody>> Process::custody_for_dirfd(int dirfd)
{
if (dirfd == AT_FDCWD)
return current_directory();
auto base_description = TRY(open_file_description(dirfd));
if (!base_description->custody())
return EINVAL;
return *base_description->custody();
}
} }

2
Kernel/Process.h
View file

@ -844,6 +844,8 @@ public:
} }
private: private:
ErrorOr<NonnullRefPtr<Custody>> custody_for_dirfd(int dirfd);
SpinlockProtected<Thread::ListInProcess>& thread_list() { return m_thread_list; } SpinlockProtected<Thread::ListInProcess>& thread_list() { return m_thread_list; }
SpinlockProtected<Thread::ListInProcess> const& thread_list() const { return m_thread_list; } SpinlockProtected<Thread::ListInProcess> const& thread_list() const { return m_thread_list; }