104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 1988 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 sccsid[] = "@(#)getpass.c 5.9 (Berkeley) 5/6/91";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <pwd.h>
|
|
#include <sys/termios.h>
|
|
#include <sys/signal.h>
|
|
#include <_syslist.h>
|
|
|
|
#ifndef _PATH_PASSWD
|
|
#define _PATH_PASSWD "/etc/passwd"
|
|
#endif
|
|
|
|
#ifndef _PASSWORD_LEN
|
|
#define _PASSWORD_LEN 128 /* max length, not counting NULL */
|
|
#endif
|
|
|
|
char *
|
|
getpass (prompt)
|
|
const char *prompt;
|
|
{
|
|
struct termios term;
|
|
register int ch;
|
|
register char *p;
|
|
FILE *fp, *outfp;
|
|
long omask;
|
|
int echo;
|
|
static char buf[_PASSWORD_LEN + 1];
|
|
|
|
/*
|
|
* read and write to /dev/tty if possible; else read from
|
|
* stdin and write to stderr.
|
|
*/
|
|
|
|
if ((outfp = fp = fopen ("/dev/tty", "w+")) == NULL)
|
|
{
|
|
outfp = stderr;
|
|
fp = stdin;
|
|
}
|
|
/*
|
|
* note - blocking signals isn't necessarily the
|
|
* right thing, but we leave it for now.
|
|
*/
|
|
omask = sigblock (sigmask (SIGINT) | sigmask (SIGTSTP));
|
|
(void) tcgetattr (fileno (fp), &term);
|
|
echo = (term.c_lflag & ECHO);
|
|
if (echo)
|
|
{
|
|
term.c_lflag &= ~ECHO;
|
|
(void) tcsetattr (fileno (fp), TCSAFLUSH, &term);
|
|
}
|
|
(void) fputs (prompt, outfp);
|
|
rewind (outfp); /* implied flush */
|
|
for (p = buf; (ch = getc (fp)) != EOF && ch != '\n';)
|
|
if (p < buf + _PASSWORD_LEN)
|
|
*p++ = ch;
|
|
*p = '\0';
|
|
(void) _write (fileno (outfp), "\n", 1);
|
|
if (echo)
|
|
{
|
|
term.c_lflag |= ECHO;
|
|
tcsetattr (fileno (fp), TCSAFLUSH, &term);
|
|
}
|
|
(void) sigsetmask (omask);
|
|
if (fp != stdin)
|
|
(void) fclose (fp);
|
|
return buf;
|
|
}
|