Function pwritev2

src/backend/libc/io/syscalls.rs:174–191

(
    fd: BorrowedFd<'_>,
    bufs: &[IoSlice<'_>],
    offset: u64,
    flags: ReadWriteFlags,
)

#[cfg(all(linux_kernel, not(target_os = "android")))]
pub(crate) fn pwritev2(
    fd: BorrowedFd<'_>,
    bufs: &[IoSlice<'_>],
    offset: u64,
    flags: ReadWriteFlags,
) -> io::Result<usize> {
    // Silently cast; we'll get `EINVAL` if the value is negative.
    let offset = offset as i64;
    unsafe {
        ret_usize(c::pwritev2(
            borrowed_fd(fd),
            bufs.as_ptr().cast::<c::iovec>(),
            min(bufs.len(), MAX_IOV) as c::c_int,
            offset,
            bitflags_bits!(flags),
        ))
    }
}

// These functions are derived from Rust's library/std/src/sys/unix/fd.rs at
// revision 326ef470a8b379a180d6dc4bbef08990698a737a.