1 /* Copyright (C) 1992,93,94,95,96,97,98,99,2000, 2001 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 #include "unlocked-io.h"
28 /* It is desirable to use this bit on systems that have it.
29 The only bit of terminal state we want to twiddle is echoing, which is
30 done in software; there is no need to change the state of the terminal
38 getpass (const char *prompt)
44 static size_t bufsize;
47 /* Try to write to and read from the terminal if we can.
48 If we can't open the terminal, use stderr and stdin. */
50 in = fopen ("/dev/tty", "w+");
59 /* Turn echoing off if it is on now. */
61 if (tcgetattr (fileno (in), &t) == 0)
63 /* Save the old one. */
66 t.c_lflag &= ~(ECHO|ISIG);
67 tty_changed = (tcsetattr (fileno (in), TCSAFLUSH|TCSASOFT, &t) == 0);
72 /* Write the prompt. */
76 /* Read the password. */
77 nread = getline (&buf, &bufsize, in);
82 else if (buf[nread - 1] == '\n')
84 /* Remove the newline. */
85 buf[nread - 1] = '\0';
87 /* Write the newline that was not echoed. */
92 /* Restore the original setting. */
94 (void) tcsetattr (fileno (in), TCSAFLUSH|TCSASOFT, &s);
97 /* We opened the terminal; now close it. */