r4988: Auto commit for Debian build

[cl-readline.git] / cl-termios.c

diff --git a/cl-termios.c b/cl-termios.c
new file mode 100644 (file)
index 0000000..cfc9a8b
--- /dev/null
+++ b/cl-termios.c
@@ -0,0 +1,78 @@
+/*
+ *   Copyright (c) 2003 Nikodemus Siivola
+ *   
+ *   Permission is hereby granted, free of charge, to any person obtaining
+ *   a copy of this software and associated documentation files (the
+ *   "Software"), to deal in the Software without restriction, including
+ *   without limitation the rights to use, copy, modify, merge, publish,
+ *   distribute, sublicense, and/or sell copies of the Software, and to
+ *   permit persons to whom the Software is furnished to do so, subject to
+ *   the following conditions:
+ *   
+ *   The above copyright notice and this permission notice shall be included
+ *   in all copies or substantial portions of the Software.
+ *   
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ *   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ *   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ *   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ *   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ *   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <unistd.h>
+#include <termios.h>
+#include <stdlib.h>
+
+typedef struct {
+  struct termios *attr;
+  void *next;
+}
+state_t;
+
+state_t * stack = NULL;
+
+int
+save_term (void)
+{
+  state_t * state = malloc (sizeof (state_t));
+  struct termios * attr = malloc (sizeof (struct termios));
+  if (! (state && attr))
+    return 0;
+
+  tcgetattr (STDIN_FILENO, attr);
+
+  state->attr = attr;
+  state->next = stack;
+  stack = state;
+
+  return 1;
+}
+  
+void
+restore_term (void)
+{
+  state_t * tmp = stack;
+  if (!stack) return;
+  
+  tcsetattr (STDIN_FILENO, TCSANOW, stack->attr);
+  stack = stack->next;
+
+  free (tmp->attr);
+  free (tmp);
+}
+
+int
+no_echo (void)
+{
+  struct termios attr;  
+  if (! (isatty (STDIN_FILENO) && save_term ())) 
+    return 0;
+
+  tcgetattr (STDIN_FILENO, &attr);
+  attr.c_lflag &= ~ECHO;
+  tcsetattr (STDIN_FILENO, TCSAFLUSH, &attr);
+
+  return 1;
+}