Move terminal reset to atexit() to catch abnormal exits.

TODO

@@ -2,7 +2,6 @@
   * use MicroConf to parse config file
   * make it possible to have vim-like seek keys
     (configure hjkl keyboard shortcuts to arrow keys)
-- fix terminal settings after crash
 
 wishlist:
 - wav output with --wav foo.wav

src/terminal.cc

@@ -36,6 +36,7 @@ using std::map;
 static char term_buffer[4096];
 static char term_buffer2[4096];
 static char *term_p = term_buffer2;
+static struct termios tio_orig;
 static Terminal *terminal_instance;
 
 static GPollFD stdin_poll_fd = { 0, G_IO_IN, 0 };
@@ -57,6 +58,17 @@ stdin_check (GSource *source)
     return FALSE;
 }
 
+static void
+reset_terminal ()
+{
+  tcsetattr(0, TCSANOW, &tio_orig);
+  char *ret = tgetstr ("ke", &term_p);
+  // disable keypad xmit
+  if (ret)
+    printf ("%s", ret);
+  fflush (stdout);
+}
+
 gboolean
 Terminal::stdin_dispatch (GSource    *source,
                           GSourceFunc callback,
@@ -83,15 +95,6 @@ Terminal::signal_sig_cont (int)
   terminal_instance->init_terminal();
 }
 
-void
-Terminal::print_term (const char *key)
-{
-  char *ret = tgetstr (const_cast<char *> (key), &term_p);
-
-  if (ret)
-    printf ("%s", ret);
-}
-
 void
 Terminal::init_terminal()
 {
@@ -105,7 +108,10 @@ Terminal::init_terminal()
   tcsetattr (0, TCSANOW, &tio_new);
 
   // enable keypad_xmit
-  print_term ("ks");
+  char *ret = tgetstr ("ks", &term_p);
+  // disable keypad xmit
+  if (ret)
+    printf ("%s", ret);
   fflush (stdout);
 }
 
@@ -134,6 +140,7 @@ Terminal::init (GMainLoop *loop, KeyHandler *key_handler)
 
   // initialize termios & keypad xmit
   init_terminal();
+  atexit(reset_terminal);
 
   // initialize common keyboard escape sequences
   bind_key ("ku", KEY_HANDLER_UP);
@@ -155,9 +162,7 @@ Terminal::init (GMainLoop *loop, KeyHandler *key_handler)
 void
 Terminal::end()
 {
-  tcsetattr(0,TCSANOW,&tio_orig);
-  // disable keypad xmit
-  print_term("ke");
+  reset_terminal();
 }
 
 void

src/terminal.h

@@ -28,7 +28,6 @@
 
 class Terminal
 {
-  struct termios             tio_orig;
   std::string                terminal_type;
   std::vector<int>           chars;
   std::map<std::string, int> keys;