| //! linux_raw syscalls supporting `rustix::pty`. |
| //! |
| //! # Safety |
| //! |
| //! See the `rustix::backend` module documentation for details. |
| #![allow(unsafe_code, clippy::undocumented_unsafe_blocks)] |
| |
| use crate::backend::conv::{by_ref, c_uint, ret}; |
| use crate::fd::BorrowedFd; |
| use crate::io; |
| use linux_raw_sys::ioctl::TIOCSPTLCK; |
| #[cfg(feature = "alloc")] |
| use { |
| crate::backend::c, crate::ffi::CString, crate::path::DecInt, alloc::vec::Vec, |
| core::mem::MaybeUninit, linux_raw_sys::ioctl::TIOCGPTN, |
| }; |
| |
| #[cfg(feature = "alloc")] |
| #[inline] |
| pub(crate) fn ptsname(fd: BorrowedFd<'_>, mut buffer: Vec<u8>) -> io::Result<CString> { |
| unsafe { |
| let mut n = MaybeUninit::<c::c_int>::uninit(); |
| ret(syscall!(__NR_ioctl, fd, c_uint(TIOCGPTN), &mut n))?; |
| |
| buffer.clear(); |
| buffer.extend_from_slice(b"/dev/pts/"); |
| buffer.extend_from_slice(DecInt::new(n.assume_init()).as_bytes()); |
| buffer.push(b'\0'); |
| Ok(CString::from_vec_with_nul_unchecked(buffer)) |
| } |
| } |
| |
| #[inline] |
| pub(crate) fn unlockpt(fd: BorrowedFd<'_>) -> io::Result<()> { |
| unsafe { |
| ret(syscall_readonly!( |
| __NR_ioctl, |
| fd, |
| c_uint(TIOCSPTLCK), |
| by_ref(&0) |
| )) |
| } |
| } |