ripytide
b473f8e432
- remove redundant readme - de-duplicate Cargo.toml information using workspace inheritance - rename "pacdef_core" to "pacdef" - move "crates/main/main.rs" to "crates/pacdef/src/main.rs"
50 lines
1.5 KiB
Rust
50 lines
1.5 KiB
Rust
use std::io::{self, Read, Write};
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use anyhow::{Context, Result};
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use termios::*;
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pub fn get_user_confirmation() -> Result<bool> {
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print!("Continue? [Y/n] ");
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std::io::stdout().flush().context("flushing stdout")?;
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let mut reply = String::new();
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std::io::stdin()
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.read_line(&mut reply)
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.context("reading stdin")?;
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Ok(reply.trim().is_empty() || reply.to_lowercase().contains('y'))
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}
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/// Read a single byte from stdin and interpret it as `char`. Use the
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/// `termios` library to switch the terminal to raw mode before reading,
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/// and restore the original terminal mode afterwards.
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///
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/// # Errors
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///
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/// This function will return an error if the data cannot be read or the
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/// terminal settings cannot be changed.
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pub fn read_single_char_from_terminal() -> Result<char> {
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// 0 is the file descriptor for stdin
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let fd = 0;
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let termios = Termios::from_fd(fd).context("getting stdin fd")?;
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let mut new_termios = termios;
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new_termios.c_lflag &= !(ICANON | ECHO);
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new_termios.c_cc[VMIN] = 1;
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new_termios.c_cc[VTIME] = 0;
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tcsetattr(fd, TCSANOW, &new_termios).context("setting terminal mode")?;
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let mut input_buffer = [0u8; 1];
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io::stdin()
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.read_exact(&mut input_buffer[..])
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.context("reading one byte from stdin")?;
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let result: char = input_buffer[0].into();
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// stdin is not echoed automatically in this terminal mode
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println!("{result}");
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// restore previous settings
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tcsetattr(fd, TCSANOW, &termios).context("restoring terminal mode")?;
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Ok(result)
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}
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