usr.bin/tip/aculib/df.c

   1 /*      $NetBSD: df.c,v 1.8 2006/04/03 00:51:14 perry Exp $     */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)df.c        8.1 (Berkeley) 6/6/93";
  36 #endif
  37 __RCSID("$NetBSD: df.c,v 1.8 2006/04/03 00:51:14 perry Exp $");
  38 #endif /* not lint */
  39
  40 /*
  41  * Dial the DF02-AC or DF03-AC
  42  */
  43
  44 #include "tip.h"
  45
  46 static jmp_buf Sjbuf;
  47
  48 static  int     df_dialer(char *, char *, int);
  49 static  void    timeout(int);
  50
  51 int
  52 df02_dialer(char *num, char *acu)
  53 {
  54
  55         return (df_dialer(num, acu, 0));
  56 }
  57
  58 int
  59 df03_dialer(char *num, char *acu)
  60 {
  61
  62         return (df_dialer(num, acu, 1));
  63 }
  64
  65 static int
  66 /*ARGSUSED*/
  67 df_dialer(char *num, char *acu __unused, int df03)
  68 {
  69         int f = FD;
  70         struct termios cntrl;
  71         speed_t volatile spd;
  72         char c;
  73
  74         spd = 0;
  75         c = '\0';
  76         (void)tcgetattr(f, &cntrl);
  77         cntrl.c_cflag |= HUPCL;
  78         (void)tcsetattr(f, TCSANOW, &cntrl);
  79         if (setjmp(Sjbuf)) {
  80                 (void)printf("connection timed out\r\n");
  81                 df_disconnect();
  82                 return (0);
  83         }
  84         if (boolean(value(VERBOSE)))
  85                 (void)printf("\ndialing...");
  86         (void)fflush(stdout);
  87 #ifdef TIOCMSET
  88         if (df03) {
  89                 int st = TIOCM_ST;      /* secondary Transmit flag */
  90
  91                 (void)tcgetattr(f, &cntrl);
  92                 spd = cfgetospeed(&cntrl);
  93                 if (spd != B1200) {     /* must dial at 1200 baud */
  94                         (void)cfsetospeed(&cntrl, B1200);
  95                         (void)cfsetispeed(&cntrl, B1200);
  96                         (void)tcsetattr(f, TCSAFLUSH, &cntrl);
  97                         (void)ioctl(f, TIOCMBIC, &st); /* clear ST for 300 baud */
  98                 } else
  99                         (void)ioctl(f, TIOCMBIS, &st); /* set ST for 1200 baud */
 100         }
 101 #endif
 102         (void)signal(SIGALRM, timeout);
 103         (void)alarm(5 * strlen(num) + 10);
 104         (void)tcflush(f, TCIOFLUSH);
 105         (void)write(f, "\001", 1);
 106         (void)sleep(1);
 107         (void)write(f, "\002", 1);
 108         (void)write(f, num, strlen(num));
 109         (void)read(f, &c, 1);
 110 #ifdef TIOCMSET
 111         if (df03 && spd != B1200) {
 112                 (void)cfsetospeed(&cntrl, spd);
 113                 (void)cfsetispeed(&cntrl, spd);
 114                 (void)tcsetattr(f, TCSAFLUSH, &cntrl);
 115         }
 116 #endif
 117         return (c == 'A');
 118 }
 119
 120 void
 121 df_disconnect(void)
 122 {
 123
 124         (void)write(FD, "\001", 1);
 125         (void)sleep(1);
 126         (void)tcflush(FD, TCIOFLUSH);
 127 }
 128
 129
 130 void
 131 df_abort(void)
 132 {
 133
 134         df_disconnect();
 135 }
 136
 137
 138 static void
 139 /*ARGSUSED*/
 140 timeout(int dummy __unused)
 141 {
 142
 143         longjmp(Sjbuf, 1);
 144 }