beginning of issue #2 on github

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 90 insertions, 0 deletions

diff --git a/src/echoes.c b/src/echoes.c
new file mode 100644
index 0000000..e1a0e63
--- /dev/null
+++ b/src/echoes.c
@@ -0,0 +1,90 @@
+/**
+ * libpassphrase – Personalisable library for TTY passphrase reading
+ * 
+ * Copyright © 2013, 2014, 2015  Mattias Andrée (maandree@member.fsf.org)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <unistd.h>
+#include <termios.h>
+
+#define PASSPHRASE_USE_DEPRECATED
+#include "passphrase.h"
+#include "passphrase_helper.h"
+
+
+
+#if !defined(PASSPHRASE_ECHO) || defined(PASSPHRASE_MOVE)
+/**
+ * The original TTY settings
+ */
+static struct termios saved_stty;
+#endif /* !PASSPHRASE_ECHO || PASSPHRASE_MOVE */
+
+
+
+/**
+ * Disable echoing and do anything else to the terminal settnings `passphrase_read` requires
+ */
+void passphrase_disable_echo(void)
+{
+  passphrase_disable_echo1(STDIN_FILENO);
+}
+
+
+/**
+ * Undo the actions of `passphrase_disable_echo`
+ */
+void passphrase_reenable_echo(void)
+{
+  passphrase_reenable_echo1(STDIN_FILENO);
+}
+
+/**
+ * Disable echoing and do anything else to the terminal settnings `passphrase_read2` requires
+ * 
+ * @param  fdin  File descriptor for input
+ */
+void passphrase_disable_echo1(int fdin)
+{
+#if !defined(PASSPHRASE_ECHO) || defined(PASSPHRASE_MOVE)
+  struct termios stty;
+  
+  tcgetattr(fdin, &stty);
+  saved_stty = stty;
+  stty.c_lflag &= (tcflag_t)~ECHO;
+# if defined(PASSPHRASE_STAR) || defined(PASSPHRASE_TEXT) || defined(PASSPHRASE_MOVE)
+  stty.c_lflag &= (tcflag_t)~ICANON;
+# endif /* PASSPHRASE_STAR || PASSPHRASE_TEXT || PASSPHRASE_MOVE */
+  tcsetattr(fdin, TCSAFLUSH, &stty);
+#else /* !PASSPHRASE_ECHO || PASSPHRASE_MOVE */
+  (void) fdin;
+#endif /* !PASSPHRASE_ECHO || PASSPHRASE_MOVE */
+}
+
+
+/**
+ * Undo the actions of `passphrase_disable_echo1`
+ * 
+ * @param  fdin  File descriptor for input
+ */
+void passphrase_reenable_echo1(int fdin)
+{
+#if !defined(PASSPHRASE_ECHO) || defined(PASSPHRASE_MOVE)
+  tcsetattr(fdin, TCSAFLUSH, &saved_stty);
+#else /* !PASSPHRASE_ECHO || !PASSPHRASE_MOVE */
+  (void) fdin;
+#endif /* !PASSPHRASE_ECHO || !PASSPHRASE_MOVE */
+}
+