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/*** includes ***/
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
#include <ctype.h>
#include <stdio.h>
#include <errno.h>
/*** data ***/
struct termios original_termios;
/*** terminal ***/
void die(const char *s) {
perror(s);
exit(1);
}
void disable_raw_mode() {
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &original_termios) == -1) {
die("tcsetattr");
}
}
void enable_raw_mode() {
if (tcgetattr(STDIN_FILENO, &original_termios) == -1) {
die("tcgetattr");
}
atexit(disable_raw_mode);
struct termios raw = original_termios;
raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
raw.c_oflag &= ~(OPOST);
raw.c_cflag |= (CS8);
raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
raw.c_cc[VMIN] = 0;
raw.c_cc[VTIME] = 1;
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1) {
die("tcsetattr");
}
}
/*** init ***/
int main() {
enable_raw_mode();
while (1) {
char c = '\0';
if (read(STDIN_FILENO, &c, 1) == -1 && errno != EAGAIN) {
die("read");
}
if (iscntrl(c)) {
printf("%d\r\n", c);
} else {
printf("%d ('%c')\r\n", c, c);
}
if (c == 'q') break;
}
return 0;
}
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