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proxmox: add fd_change_cloexec

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This commit is contained in:
Dietmar Maurer 2021-11-18 13:06:34 +01:00
parent 3a378a34bb
commit 9f4c20f3d2
1 changed files with 9 additions and 0 deletions
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9
proxmox/src/tools/fd.rs
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@ -7,6 +7,7 @@ use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
use nix::fcntl::OFlag;
use nix::sys::stat::Mode;
use nix::NixPath;
use nix::fcntl::{fcntl, FdFlag, F_GETFD, F_SETFD};
/// Guard a raw file descriptor with a drop handler. This is mostly useful when access to an owned
/// `RawFd` is required without the corresponding handler object (such as when only the file
@ -194,3 +195,11 @@ impl<'a, T: ?Sized + AsRawFd> From<&'a T> for BorrowedFd<'a> {
Self::new(fd)
}
}
/// Change the `O_CLOEXEC` flag of an existing file descriptor.
pub fn fd_change_cloexec(fd: RawFd, on: bool) -> Result<(), anyhow::Error> {
let mut flags = unsafe { FdFlag::from_bits_unchecked(fcntl(fd, F_GETFD)?) };
flags.set(FdFlag::FD_CLOEXEC, on);
fcntl(fd, F_SETFD(flags))?;
Ok(())
}