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0 pointsvoxic114y ago0 comments

File Descriptors are not files. They are unique per process so the rust compiler should be able to completely track their ownership.

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3 comments · 1 top-level

hn_go_brrrrr4y ago· 2 in thread

No they're not. Other processes can pass you an fd at startup, you can send/receive fds across a Unix domain socket, and there are even syscalls for copying another process's fds.

estebank4y ago

But another process wouldn't be passing an OwnedFd in that case, and sending an OwnedFd away would pass the underlying FD and drop the wrapping OwnedFd. The process receiving the FD would have to take care (as today in any C program) to determine whether they are responsible dispose of the FD or not.

brandmeyer4y ago

The receiving process gets a copy of the file descriptor. Both processes must close(2) it.

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