Function fcntl

block/src/fcntl.rs:46–54

Wrapper for [`libc::fcntl`] that properly sets the function arguments.

(fd: RawFd, arg: FcntlArg)

/// Wrapper for [`libc::fcntl`] that properly sets the function arguments.
fn fcntl(fd: RawFd, arg: FcntlArg) -> libc::c_int {
    // SAFETY: We use a valid FD.
    unsafe {
        match arg {
            FcntlArg::F_OFD_SETLK(flock) => libc::fcntl(fd, libc::F_OFD_SETLK, flock),
            FcntlArg::F_OFD_GETLK(flock) => libc::fcntl(fd, libc::F_OFD_GETLK, flock),
        }
    }
}

/// Describes the type of lock you want to set.
#[derive(Clone, Copy, Debug)]