Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

vendor/rustix/src/backend/libc/io/windows_syscalls.rs

@@ -0,0 +1,30 @@
+//! Windows system calls in the `io` module.
+
+use crate::backend::c;
+use crate::backend::conv::{borrowed_fd, ret_c_int};
+use crate::backend::fd::LibcFd;
+use crate::fd::{BorrowedFd, RawFd};
+use crate::io;
+use crate::ioctl::{IoctlOutput, RawOpcode};
+
+pub(crate) unsafe fn close(raw_fd: RawFd) {
+    let _ = c::close(raw_fd as LibcFd);
+}
+
+#[inline]
+pub(crate) unsafe fn ioctl(
+    fd: BorrowedFd<'_>,
+    request: RawOpcode,
+    arg: *mut c::c_void,
+) -> io::Result<IoctlOutput> {
+    ret_c_int(c::ioctl(borrowed_fd(fd), request, arg.cast()))
+}
+
+#[inline]
+pub(crate) unsafe fn ioctl_readonly(
+    fd: BorrowedFd<'_>,
+    request: RawOpcode,
+    arg: *mut c::c_void,
+) -> io::Result<IoctlOutput> {
+    ioctl(fd, request, arg)
+}