usr/src/cmd/cmd-inet/usr.bin/ftp/getpass.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  *      Copyright 2001 Sun Microsystems, Inc.  All rights reserved.
  24  *      Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
  28 /*      All Rights Reserved     */
  29
  30 /*
  31  *      University Copyright- Copyright (c) 1982, 1986, 1988
  32  *      The Regents of the University of California
  33  *      All Rights Reserved
  34  *
  35  *      University Acknowledgment- Portions of this document are derived from
  36  *      software developed by the University of California, Berkeley, and its
  37  *      contributors.
  38  */
  39
  40 #pragma ident   "%Z%%M% %I%     %E% SMI"
  41
  42 #include "ftp_var.h"
  43
  44 static  struct termios termios_b;
  45 static  tcflag_t flags;
  46 static  FILE *fi;
  47
  48 /* ARGSUSED */
  49 static void
  50 intfix(int sig)
  51 {
  52         termios_b.c_lflag = flags;
  53         (void) tcsetattr(fileno(fi), TCSADRAIN, &termios_b);
  54         exit(EXIT_FAILURE);
  55 }
  56
  57 char *
  58 mygetpass(char *prompt)
  59 {
  60         register char *p;
  61         register int c;
  62         static char pbuf[50+1];
  63         void (*sig)();
  64
  65         stop_timer();
  66         if ((fi = fopen("/dev/tty", "r")) == NULL)
  67                 fi = stdin;
  68         else
  69                 setbuf(fi, (char *)NULL);
  70
  71         if (tcgetattr(fileno(fi), &termios_b) < 0)
  72                 perror("ftp: tcgetattr");       /* go ahead, anyway */
  73         flags = termios_b.c_lflag;
  74
  75         sig = signal(SIGINT, intfix);
  76
  77         termios_b.c_lflag &= ~ECHO;
  78         (void) tcsetattr(fileno(fi), TCSADRAIN, &termios_b);
  79         (void) fprintf(stderr, "%s", prompt);
  80         (void) fflush(stderr);
  81         p = pbuf;
  82         while ((c = getc(fi)) != '\n' && c != EOF) {
  83                 if (p < &pbuf[sizeof (pbuf)-1])
  84                         *p++ = c;
  85         }
  86         *p = '\0';
  87         (void) fprintf(stderr, "\n");
  88         (void) fflush(stderr);
  89         termios_b.c_lflag = flags;
  90         (void) tcsetattr(fileno(fi), TCSADRAIN, &termios_b);
  91         (void) signal(SIGINT, sig);
  92         if (fi != stdin)
  93                 (void) fclose(fi);
  94         reset_timer();
  95         return (pbuf);
  96 }