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getpass.c
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getpass.c
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/*
* Copyright (C) 2016 Score_Under. All Rights Reserved.
* Copyright (C) 2000, 2001 Const Kaplinsky. All Rights Reserved.
* Copyright (C) 2000 Tridia Corporation. All Rights Reserved.
* Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
*
* This 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 2 of the License, or
* (at your option) any later version.
*
* This software 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 software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#include "getpass.h"
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <termios.h>
#include <unistd.h>
static char buffer[512];
char *getpass(const char * prompt)
{
struct termios old_termios;
bool have_termios = tcgetattr(STDIN_FILENO, &old_termios) == 0;
if (have_termios) {
struct termios new_termios = old_termios;
new_termios.c_lflag &= (tcflag_t) ~ECHO;
tcsetattr(STDIN_FILENO, TCSANOW, &new_termios);
}
fputs(prompt, stdout);
char *fgets_result = fgets(buffer, sizeof buffer, stdin);
tcsetattr(STDIN_FILENO, TCSANOW, &old_termios);
if (!fgets_result)
return NULL;
size_t len = strlen(buffer);
if (len > 0 && buffer[len - 1] == '\n')
buffer[len - 1] = 0;
return buffer;
}