raw mode implementation

test/Makefile

@@ -0,0 +1,10 @@
+##
+# TEST
+#
+# @file
+# @version 0.1
+
+main: main.c
+	$(CC) main.c -o main -Wall -Wextra -pedantic
+
+# end

test/main.c

@@ -0,0 +1,68 @@
+#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_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
+  raw.c_oflag &= ~(OPOST);
+  raw.c_cflag |= (CS8);
+  raw.c_lflag &= ~(ECHO | ICANON | ISIG | IEXTEN);
+  raw.c_cc[VMIN] = 0;
+  raw.c_cc[VTIME] = 1;
+
+  if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1) {
+    die("tcgetattr");
+  }
+}
+
+/* init */
+
+int main() {
+  char c;
+
+  enableRawMode();
+
+  while (1) {
+    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;
+    }
+  }
+  return 0;
+}