usr.bin/ftp/getpass.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2001 Sun Microsystems, Inc.  All rights reserved.
 *  Use is subject to license terms.
 */

/*  Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/*  All Rights Reserved     */

/*
 *  University Copyright- Copyright (c) 1982, 1986, 1988
 *  The Regents of the University of California
 *  All Rights Reserved
 *
 *  University Acknowledgment- Portions of this document are derived from
 *  software developed by the University of California, Berkeley, and its
 *  contributors.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include "ftp_var.h"

static  struct termios termios_b;
static  tcflag_t flags;
static  FILE *fi;

/* ARGSUSED */
static void
intfix(int sig)
{
    termios_b.c_lflag = flags;
    (void) tcsetattr(fileno(fi), TCSADRAIN, &termios_b);
    exit(EXIT_FAILURE);
}

char *
mygetpass(char *prompt)
{
    register char *p;
    register int c;
    static char pbuf[50+1];
    void (*sig)();

    stop_timer();
    if ((fi = fopen("/dev/tty", "r")) == NULL)
        fi = stdin;
    else
        setbuf(fi, (char *)NULL);

    if (tcgetattr(fileno(fi), &termios_b) < 0)
        perror("ftp: tcgetattr");   /* go ahead, anyway */
    flags = termios_b.c_lflag;

    sig = signal(SIGINT, intfix);

    termios_b.c_lflag &= ~ECHO;
    (void) tcsetattr(fileno(fi), TCSADRAIN, &termios_b);
    (void) fprintf(stderr, "%s", prompt);
    (void) fflush(stderr);
    p = pbuf;
    while ((c = getc(fi)) != '\n' && c != EOF) {
        if (p < &pbuf[sizeof (pbuf)-1])
            *p++ = c;
    }
    *p = '\0';
    (void) fprintf(stderr, "\n");
    (void) fflush(stderr);
    termios_b.c_lflag = flags;
    (void) tcsetattr(fileno(fi), TCSADRAIN, &termios_b);
    (void) signal(SIGINT, sig);
    if (fi != stdin)
        (void) fclose(fi);
    reset_timer();
    return (pbuf);
}