1 /* $NetBSD: getpass.c,v 1.15 2003/08/07 16:42:50 agc Exp $ */
3 * Copyright (c) 1988, 1993
4 * The Regents of the University of California. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 #if defined(LIBC_SCCS) && !defined(lint)
34 static char sccsid[] = "@(#)getpass.c 8.1 (Berkeley) 6/4/93";
36 __RCSID("$NetBSD: getpass.c,v 1.15 2003/08/07 16:42:50 agc Exp $");
38 #endif /* LIBC_SCCS and not lint */
39 #include "namespace.h"
50 __weak_alias(getpass,_getpass)
62 static char buf[_PASSWORD_LEN + 1];
65 _DIAGASSERT(prompt != NULL);
68 * read and write to /dev/tty if possible; else read from
69 * stdin and write to stderr.
71 if ((outfp = fp = fopen(_PATH_TTY, "w+")) == NULL) {
76 * note - blocking signals isn't necessarily the
77 * right thing, but we leave it for now.
80 sigaddset(&nset, SIGINT);
81 sigaddset(&nset, SIGTSTP);
82 (void)sigprocmask(SIG_BLOCK, &nset, &oset);
83 (void)tcgetattr(fileno(fp), &term);
84 if ((echo = (term.c_lflag & ECHO)) != 0) {
85 term.c_lflag &= ~ECHO;
86 (void)tcsetattr(fileno(fp), TCSAFLUSH /*|TCSASOFT*/, &term);
89 (void)fputs(prompt, outfp);
90 rewind(outfp); /* implied flush */
91 for (p = buf; (ch = getc(fp)) != EOF && ch != '\n';)
92 if (p < buf + _PASSWORD_LEN)
95 (void)write(fileno(outfp), "\n", 1);
98 (void)tcsetattr(fileno(fp), TCSAFLUSH/*|TCSASOFT*/, &term);
100 (void)sigprocmask(SIG_SETMASK, &oset, NULL);