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v 3.1.0

    1: /*
    2:  * An implementation of getpass for systems that lack one.
    3:  *
    4:  * Copyright (C) 2013 Roman Donchenko
    5:  *
    6:  * This program is free software; you can redistribute it and/or modify
    7:  * it under the terms of the GNU General Public License as published by
    8:  * the Free Software Foundation; either version 3 of the License, or
    9:  * (at your option) any later version.
   10:  *
   11:  * This program is distributed in the hope that it will be useful,
   12:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   13:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   14:  * GNU General Public License for more details.
   15:  *
   16:  * You should have received a copy of the GNU General Public License along
   17:  * with this program; if not, visit the http://fsf.org website.
   18:  */
   19: 
   20: #include <stdio.h>
   21: #include <string.h>
   22: #include <termios.h>
   23: 
   24: #include "rsync.h"
   25: 
   26: char *getpass(const char *prompt)
   27: {
   28: 	static char password[256];
   29: 
   30: 	BOOL tty_changed = False, read_success;
   31: 	struct termios tty_old, tty_new;
   32: 	FILE *in = stdin, *out = stderr;
   33: 	FILE *tty = fopen("/dev/tty", "w+");
   34: 
   35: 	if (tty)
   36: 		in = out = tty;
   37: 
   38: 	if (tcgetattr(fileno(in), &tty_old) == 0) {
   39: 		tty_new = tty_old;
   40: 		tty_new.c_lflag &= ~(ECHO | ISIG);
   41: 
   42: 		if (tcsetattr(fileno(in), TCSAFLUSH, &tty_new) == 0)
   43: 			tty_changed = True;
   44: 	}
   45: 
   46: 	if (!tty_changed)
   47: 		fputs("(WARNING: will be visible) ", out);
   48: 	fputs(prompt, out);
   49: 	fflush(out);
   50: 
   51: 	read_success = fgets(password, sizeof password, in) != NULL;
   52: 
   53: 	/* Print the newline that hasn't been echoed. */
   54: 	fputc('\n', out);
   55: 
   56: 	if (tty_changed)
   57: 		tcsetattr(fileno(in), TCSAFLUSH, &tty_old);
   58: 
   59: 	if (tty)
   60: 		fclose(tty);
   61: 
   62: 	if (read_success) {
   63: 		/* Remove the trailing newline. */
   64: 		size_t password_len = strlen(password);
   65: 		if (password_len && password[password_len - 1] == '\n')
   66: 			password[password_len - 1] = '\0';
   67: 
   68: 		return password;
   69: 	}
   70: 
   71: 	return NULL;
   72: }