/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1988 AT&T */
/*        All Rights Reserved   */

#pragma weak _getpass = getpass
#pragma weak _getpassphrase = getpassphrase

#include "lint.h"
#include "file64.h"
#include "mtlib.h"
#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
#include <unistd.h>
#include <stropts.h>
#include <termio.h>
#include <thread.h>
#include <synch.h>
#include "libc.h"
#include "stdiom.h"
#include "tsd.h"

static int intrupt;
static char *__getpass(const char *, int);

#define MAXPASSWD       256     /* max significant characters in password */
#define SMLPASSWD       8       /* unix standard  characters in password */


char *
getpass(const char *prompt)
{
        return ((char *)__getpass(prompt, SMLPASSWD));
}

char *
getpassphrase(const char *prompt)
{
        return ((char *)__getpass(prompt, MAXPASSWD));
}

        static void catch(int);

static char *
__getpass(const char *prompt, int size)
{
        struct termio ttyb;
        unsigned short flags;
        char *p;
        int c;
        FILE    *fi;
        char *pbuf = tsdalloc(_T_GETPASS, MAXPASSWD + 1, NULL);
        struct sigaction act, osigint, osigtstp;

        if (pbuf == NULL ||
            (fi = fopen("/dev/tty", "r+F")) == NULL)
                return (NULL);
        setbuf(fi, NULL);

        intrupt = 0;
        act.sa_flags = 0;
        act.sa_handler = catch;
        (void) sigemptyset(&act.sa_mask);
        (void) sigaction(SIGINT, &act, &osigint);       /* trap interrupt */
        act.sa_handler = SIG_IGN;
        (void) sigaction(SIGTSTP, &act, &osigtstp);     /* ignore stop */
        (void) ioctl(fileno(fi), TCGETA, &ttyb);
        flags = ttyb.c_lflag;
        ttyb.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
        (void) ioctl(fileno(fi), TCSETAF, &ttyb);

        (void) fputs(prompt, fi);
        p = pbuf;
        while (!intrupt &&
            (c = GETC(fi)) != '\n' && c != '\r' && c != EOF) {
                if (p < &pbuf[ size ])
                        *p++ = (char)c;
        }
        *p = '\0';
        (void) PUTC('\n', fi);

        ttyb.c_lflag = flags;
        (void) ioctl(fileno(fi), TCSETAW, &ttyb);
        (void) sigaction(SIGINT, &osigint, NULL);
        (void) sigaction(SIGTSTP, &osigtstp, NULL);
        (void) fclose(fi);
        if (intrupt) {          /* if interrupted erase the input */
                pbuf[0] = '\0';
                (void) kill(getpid(), SIGINT);
        }
        return (pbuf);
}

static void
catch(int x __unused)
{
        intrupt = 1;
}