wye 0.1.0

Wye is reverse tee, simple multiplexer like tmux
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57

use std::{
    error,
    os::fd::{AsRawFd, BorrowedFd, RawFd},
};

use nix::{
    libc::{STDOUT_FILENO, TIOCGWINSZ, TIOCSCTTY, TIOCSWINSZ},
    pty::Winsize,
    sys::termios::{SetArg, Termios, tcgetattr, tcsetattr},
};

nix::ioctl_read_bad!(tiocgwinsz, TIOCGWINSZ, Winsize);
nix::ioctl_write_ptr_bad!(tiocswinsz, TIOCSWINSZ, Winsize);
nix::ioctl_none_bad!(tiocsctty, TIOCSCTTY);

pub fn get_winsize() -> Result<Winsize, Box<dyn error::Error>> {
    let mut winsize = Winsize {
        ws_row: 24,
        ws_col: 80,
        ws_xpixel: 0,
        ws_ypixel: 0,
    };

    unsafe {
        tiocgwinsz(STDOUT_FILENO, &mut winsize)?;
    }
    Ok(winsize)
}

pub fn update_pty_size(fd: &impl AsRawFd, size: &Winsize) -> Result<(), Box<dyn error::Error>> {
    unsafe {
        tiocswinsz(fd.as_raw_fd(), size)?;
    }
    Ok(())
}

pub struct TerminalModeGuard {
    original: Termios,
    fd: RawFd,
}

impl TerminalModeGuard {
    pub fn new(fd: RawFd) -> nix::Result<Self> {
        let original = tcgetattr(unsafe { BorrowedFd::borrow_raw(fd) })?;
        Ok(Self { original, fd })
    }
}

impl Drop for TerminalModeGuard {
    fn drop(&mut self) {
        let _ = tcsetattr(
            unsafe { BorrowedFd::borrow_raw(self.fd) },
            SetArg::TCSANOW,
            &self.original,
        );
    }
}