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/*
* An implementation of getpass for systems that lack one.
*
* Copyright (C) 2013 Roman Donchenko
*
* 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, visit the http://fsf.org website.
*/
#include <stdio.h>
#include <string.h>
#include <termios.h>
#include "rsync.h"
char *getpass(const char *prompt)
{
static char password[256];
BOOL tty_changed = False, read_success;
struct termios tty_old, tty_new;
FILE *in = stdin, *out = stderr;
FILE *tty = fopen("/dev/tty", "w+");
if (tty)
in = out = tty;
if (tcgetattr(fileno(in), &tty_old) == 0) {
tty_new = tty_old;
tty_new.c_lflag &= ~(ECHO | ISIG);
if (tcsetattr(fileno(in), TCSAFLUSH, &tty_new) == 0)
tty_changed = True;
}
if (!tty_changed)
fputs("(WARNING: will be visible) ", out);
fputs(prompt, out);
fflush(out);
read_success = fgets(password, sizeof password, in) != NULL;
/* Print the newline that hasn't been echoed. */
fputc('\n', out);
if (tty_changed)
tcsetattr(fileno(in), TCSAFLUSH, &tty_old);
if (tty)
fclose(tty);
if (read_success) {
/* Remove the trailing newline. */
size_t password_len = strlen(password);
if (password_len && password[password_len - 1] == '\n')
password[password_len - 1] = '\0';
return password;
}
return NULL;
}
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