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Close ​

Closes a file descriptor.

Module: Linux

Signature ​

rux
func Close(fd: int32) -> int64;

Parameters ​

NameTypeDescription
fdint32File descriptor to close.

Returns ​

int64 — 0 on success, or a negative errno result on failure.

Description ​

After a successful close, fd no longer refers to the resource and may be reused by a later operation. Do not close a descriptor more than once.

WARNING

Retrying Close after an error is unsafe on Linux because the descriptor may already have been released and reused. Handle the reported error without blindly repeating the call.

Example ​

rux
import Linux::{ Close, IsError };

if IsError(Close(fd)) {
    return 1i32;
}