15 lines
444 B
Rust
15 lines
444 B
Rust
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//! Raw file descriptor related utilities.
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use std::os::unix::io::RawFd;
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use anyhow::Error;
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use nix::fcntl::{fcntl, FdFlag, F_GETFD, F_SETFD};
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/// Change the `O_CLOEXEC` flag of an existing file descriptor.
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pub fn fd_change_cloexec(fd: RawFd, on: bool) -> Result<(), Error> {
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let mut flags = unsafe { FdFlag::from_bits_unchecked(fcntl(fd, F_GETFD)?) };
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flags.set(FdFlag::FD_CLOEXEC, on);
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fcntl(fd, F_SETFD(flags))?;
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Ok(())
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}
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