Subversion Repositories or1k

/*

 * 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;

}