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/**
* 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) || defined(PASSPHRASE_METER)
# define NEED_TERMIOS
#else
# ifdef NEED_TERMIOS
# undef NEED_TERMIOS
# endif
#endif /* !PASSPHRASE_ECHO || PASSPHRASE_MOVE || PASSPHRASE_METER */
#if defined(NEED_TERMIOS)
/**
* The original TTY settings
*/
static struct termios saved_stty;
#endif /* NEED_TERMIOS */
/**
* 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
*/
#if defined(__GNUC__) && !defined(NEED_TERMIOS)
__attribute__((const))
#endif /* __GNUC__ && !NEED_TERMIOS */
void passphrase_disable_echo1(int fdin)
{
#if defined(NEED_TERMIOS)
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) || defined(PASSPHRASE_METER)
stty.c_lflag &= (tcflag_t)~ICANON;
# endif /* PASSPHRASE_STAR || PASSPHRASE_TEXT || PASSPHRASE_MOVE || PASSPHRASE_METER */
tcsetattr(fdin, TCSAFLUSH, &stty);
#else /* NEED_TERMIOS */
(void) fdin;
#endif /* NEED_TERMIOS */
}
/**
* Undo the actions of `passphrase_disable_echo1`
*
* @param fdin File descriptor for input
*/
#if defined(__GNUC__) && !defined(NEED_TERMIOS)
__attribute__((const))
#endif /* __GNUC__ && !NEED_TERMIOS */
void passphrase_reenable_echo1(int fdin)
{
#if defined(NEED_TERMIOS)
tcsetattr(fdin, TCSAFLUSH, &saved_stty);
#else /* NEED_TERMIOS */
(void) fdin;
#endif /* NEED_TERMIOS */
}
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