80 lines
2.2 KiB
Rust
80 lines
2.2 KiB
Rust
/// Helper functions, especially to reproduce C std/posix functions
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use nix::errno::*;
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use nix::sys::termios;
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use nix::sys::termios::{
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ControlFlags, InputFlags, LocalFlags, OutputFlags, SpecialCharacterIndices, Termios,
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};
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use nix::Error as NixError;
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use std::io::Error;
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use std::os::unix::io::RawFd;
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use std::process::exit;
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// Redefine the posix constants for rust land
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pub const STDIN_FILENO: i32 = 0;
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// pub const STDOUT_FILENO: i32 = 1;
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// pub const STDERR_FILENO: i32 = 2;
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pub fn die(code: &Errno, msg: &str) -> ! {
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eprintln!("{:?} ({})", code, msg);
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exit(1)
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}
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pub fn get_termios(fd: RawFd) -> Termios {
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termios::tcgetattr(fd).unwrap()
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}
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pub fn enable_raw_mode() -> Result<(), Error> {
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let mut raw = get_termios(STDIN_FILENO);
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raw.input_flags.remove(
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InputFlags::BRKINT
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| InputFlags::IGNCR
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| InputFlags::IGNBRK
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| InputFlags::ICRNL
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| InputFlags::INLCR
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| InputFlags::INPCK
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| InputFlags::ISTRIP
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| InputFlags::IXON
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| InputFlags::PARMRK,
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);
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raw.output_flags.remove(OutputFlags::OPOST);
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raw.local_flags.remove(
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LocalFlags::ECHO
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| LocalFlags::ECHONL
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| LocalFlags::ICANON
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| LocalFlags::IEXTEN
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| LocalFlags::ISIG,
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);
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raw.control_flags
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.remove(ControlFlags::CSIZE | ControlFlags::PARENB);
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// 8 bit characters
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raw.control_flags |= termios::ControlFlags::CS8;
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raw.control_chars[SpecialCharacterIndices::VMIN as usize] = 0;
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raw.control_chars[SpecialCharacterIndices::VTIME as usize] = 1;
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match termios::tcsetattr(STDIN_FILENO, termios::SetArg::TCSAFLUSH, &raw) {
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Ok(()) => Ok(()),
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Err(e) => match e.as_errno() {
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Some(errno) => die(&errno, "tcsetattr"),
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None => panic!("Failed to enable raw mode"),
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},
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}
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}
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pub fn disable_raw_mode(original: &Termios) -> Result<(), Error> {
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match termios::tcsetattr(STDIN_FILENO, termios::SetArg::TCSAFLUSH, original) {
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Ok(()) => Ok(()),
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Err(E) => match E.as_errno() {
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Some(errno) => die(&errno, "tcsetattr"),
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None => panic!("Failed to disable raw mode"),
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},
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}
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}
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