initial import

1 files changed, 60 insertions, 0 deletions

diff --git a/manual/examples/termios.c b/manual/examples/termios.c
new file mode 100644
index 0000000000..6db5990a0c
--- /dev/null
+++ b/manual/examples/termios.c
@@ -0,0 +1,60 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <termios.h>
+
+/* Use this variable to remember original terminal attributes. */
+
+struct termios saved_attributes;
+
+void 
+reset_input_mode (void)
+{
+  tcsetattr (STDIN_FILENO, TCSANOW, &saved_attributes);
+}
+
+void 
+set_input_mode (void)
+{
+  struct termios tattr;
+  char *name;
+
+  /* Make sure stdin is a terminal. */
+  if (!isatty (STDIN_FILENO))
+    {
+      fprintf (stderr, "Not a terminal.\n");
+      exit (EXIT_FAILURE);
+    }
+
+  /* Save the terminal attributes so we can restore them later. */
+  tcgetattr (STDIN_FILENO, &saved_attributes);
+  atexit (reset_input_mode);
+
+/*@group*/
+  /* Set the funny terminal modes. */
+  tcgetattr (STDIN_FILENO, &tattr);
+  tattr.c_lflag &= ~(ICANON|ECHO); /* Clear ICANON and ECHO.  */
+  tattr.c_cc[VMIN] = 1;
+  tattr.c_cc[VTIME] = 0;
+  tcsetattr (STDIN_FILENO, TCSAFLUSH, &tattr);
+}
+/*@end group*/
+
+int
+main (void)
+{
+  char c;
+
+  set_input_mode ();
+
+  while (1)
+    {
+      read (STDIN_FILENO, &c, 1);
+      if (c == '\004')		/* @kbd{C-d} */
+	break;
+      else
+	putchar (c);
+    }
+
+  return EXIT_SUCCESS;
+}