90 lines
1.7 KiB
C++
90 lines
1.7 KiB
C++
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/*
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* Unix test code that puts the terminal into raw mode, then echos typed
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* characters to stdout. Derived from sample code in the Stevens book, posted
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* online at http://www.lafn.org/~dave/linux/terminalIO.html.
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*/
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#include <termios.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "FormatChar.h"
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static struct termios save_termios;
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static int term_saved;
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/* RAW! mode */
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int tty_raw(int fd)
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{
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struct termios buf;
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if (tcgetattr(fd, &save_termios) < 0) /* get the original state */
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return -1;
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buf = save_termios;
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/* echo off, canonical mode off, extended input
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processing off, signal chars off */
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buf.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
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/* no SIGINT on BREAK, CR-to-NL off, input parity
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check off, don't strip the 8th bit on input,
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ouput flow control off */
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buf.c_iflag &= ~(BRKINT | ICRNL | ISTRIP | IXON);
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/* clear size bits, parity checking off */
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buf.c_cflag &= ~(CSIZE | PARENB);
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/* set 8 bits/char */
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buf.c_cflag |= CS8;
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/* output processing off */
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buf.c_oflag &= ~(OPOST);
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buf.c_cc[VMIN] = 1; /* 1 byte at a time */
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buf.c_cc[VTIME] = 0; /* no timer on input */
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if (tcsetattr(fd, TCSAFLUSH, &buf) < 0)
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return -1;
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term_saved = 1;
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return 0;
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}
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/* set it to normal! */
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int tty_reset(int fd)
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{
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if (term_saved)
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if (tcsetattr(fd, TCSAFLUSH, &save_termios) < 0)
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return -1;
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return 0;
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}
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int main()
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{
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tty_raw(0);
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int count = 0;
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while (true) {
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char ch;
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char buf[16];
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int actual = read(0, &ch, 1);
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if (actual != 1) {
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perror("read error");
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break;
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}
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formatChar(buf, ch);
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fputs(buf, stdout);
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fflush(stdout);
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if (ch == 3) // Ctrl-C
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break;
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}
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tty_reset(0);
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return 0;
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}
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