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use crate::error::*;
use ::std::os::unix::io::{AsRawFd as _, IntoRawFd as _};
pub mod std;
#[cfg(feature = "async-std")]
pub mod async_io;
#[cfg(feature = "tokio")]
pub mod tokio;
pub trait Pty {
fn new() -> Result<Self>
where
Self: Sized;
fn pt(&self) -> &::std::fs::File;
fn pts(&self) -> Result<::std::fs::File>;
fn resize(&self, size: &super::Size) -> Result<()> {
set_term_size(self.pt(), size).map_err(Error::SetTermSize)
}
}
pub struct Size {
row: u16,
col: u16,
xpixel: u16,
ypixel: u16,
}
impl Size {
pub fn new(row: u16, col: u16) -> Self {
Self {
row,
col,
xpixel: 0,
ypixel: 0,
}
}
pub fn new_with_pixel(
row: u16,
col: u16,
xpixel: u16,
ypixel: u16,
) -> Self {
Self {
row,
col,
xpixel,
ypixel,
}
}
}
impl From<&Size> for nix::pty::Winsize {
fn from(size: &Size) -> Self {
Self {
ws_row: size.row,
ws_col: size.col,
ws_xpixel: size.xpixel,
ws_ypixel: size.ypixel,
}
}
}
fn create_pt() -> Result<(::std::os::unix::io::RawFd, ::std::path::PathBuf)> {
let pt = nix::pty::posix_openpt(
nix::fcntl::OFlag::O_RDWR | nix::fcntl::OFlag::O_NOCTTY,
)
.map_err(Error::CreatePty)?;
nix::pty::grantpt(&pt).map_err(Error::CreatePty)?;
nix::pty::unlockpt(&pt).map_err(Error::CreatePty)?;
let ptsname = nix::pty::ptsname_r(&pt).map_err(Error::CreatePty)?.into();
let pt_fd = pt.into_raw_fd();
Ok((pt_fd, ptsname))
}
nix::ioctl_write_ptr_bad!(
set_term_size_unsafe,
libc::TIOCSWINSZ,
nix::pty::Winsize
);
fn set_term_size(file: &::std::fs::File, size: &Size) -> nix::Result<()> {
let size = size.into();
let fd = file.as_raw_fd();
// safe because std::fs::File is required to contain a valid file
// descriptor and size is guaranteed to be initialized because it's a
// normal rust value, and nix::pty::Winsize is a repr(C) struct with the
// same layout as `struct winsize` from sys/ioctl.h.
unsafe { set_term_size_unsafe(fd, &size as *const nix::pty::Winsize) }
.map(|_| ())
}
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