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/*
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char rcsid[] = "$OpenBSD: getpass.c,v 1.6 1999/12/08 04:26:13 millert Exp $";
#endif /* LIBC_SCCS and not lint */
#include <fcntl.h>
#include <paths.h>
#include <pwd.h>
#include <signal.h>
#include <termios.h>
#include <unistd.h>
char *
getpass(prompt)
const char *prompt;
{
struct termios term;
char ch, *p;
int echo, input, output;
static char buf[_PASSWORD_LEN + 1];
sigset_t oset, nset;
/*
* Read and write to /dev/tty if possible; else read from
* stdin and write to stderr.
*/
if ((input = output = open(_PATH_TTY, O_RDWR)) == -1) {
input = STDIN_FILENO;
output = STDERR_FILENO;
}
/*
* Note - blocking signals isn't necessarily the
* right thing, but we leave it for now.
*/
sigemptyset(&nset);
sigaddset(&nset, SIGINT);
sigaddset(&nset, SIGTSTP);
(void)sigprocmask(SIG_BLOCK, &nset, &oset);
/* Turn off echo if possible. */
if (tcgetattr(input, &term) == 0 && (term.c_lflag & ECHO)) {
echo = 1;
term.c_lflag &= ~ECHO;
(void)tcsetattr(input, TCSAFLUSH|TCSASOFT, &term);
} else
echo = 0;
(void)write(output, prompt, strlen(prompt));
for (p = buf; read(input, &ch, 1) == 1 && ch != '\n';)
if (p < buf + _PASSWORD_LEN)
*p++ = ch;
*p = '\0';
(void)write(output, "\n", 1);
if (echo) {
term.c_lflag |= ECHO;
(void)tcsetattr(input, TCSAFLUSH|TCSASOFT, &term);
}
(void)sigprocmask(SIG_SETMASK, &oset, NULL);
if (input != STDIN_FILENO)
(void)close(input);
return(buf);
}
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