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/*** includes ***/ #include <ctype.h> #include <errno.h> #include <stdio.h> #include <stdlib.h> #include <termios.h> #include <unistd.h> /*** defines ***/ #define CTRL_KEY(k) ((k) & 0x1f) /*** data ***/ struct termios orig_termios; /*** terminal ***/ void die(const char *s) { perror(s); exit(1); } void disableRawMode() { if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &orig_termios) == -1) { die("tcsetattr"); } } void enableRawMode() { if (tcgetattr(STDIN_FILENO, &orig_termios) == -1) { die("tcgetattr"); } atexit(disableRawMode); struct termios raw = orig_termios; raw.c_lflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON); raw.c_lflag &= ~(OPOST); raw.c_lflag |= (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() { enableRawMode(); 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 == CTRL_KEY('q')) break; if (c == 'q') break; } return 0; }
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