usr.bin/tip/aculib/dn11.c

   1 /*      $NetBSD: dn11.c,v 1.9 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[] = "@(#)dn11.c      8.1 (Berkeley) 6/6/93";
  36 #endif
  37 __RCSID("$NetBSD: dn11.c,v 1.9 2006/04/03 00:51:14 perry Exp $");
  38 #endif /* not lint */
  39
  40 /*
  41  * Routines for dialing up on DN-11
  42  */
  43 #include "tip.h"
  44
  45 static jmp_buf jmpbuf;
  46 static int child = -1, dn;
  47
  48 static  void    alarmtr(int);
  49
  50 int
  51 dn_dialer(char *num, char *acu)
  52 {
  53         int lt, nw;
  54         int timelim;
  55         struct termios cntrl;
  56
  57         if (boolean(value(VERBOSE)))
  58                 (void)printf("\nstarting call...");
  59         if ((dn = open(acu, O_WRONLY)) < 0) {
  60                 if (errno == EBUSY)
  61                         (void)printf("line busy...");
  62                 else
  63                         (void)printf("acu open error...");
  64                 return (0);
  65         }
  66         if (setjmp(jmpbuf)) {
  67                 (void)kill(child, SIGKILL);
  68                 (void)close(dn);
  69                 return (0);
  70         }
  71         (void)signal(SIGALRM, alarmtr);
  72         timelim = 5 * strlen(num);
  73         (void)alarm((unsigned)(timelim < 30 ? 30 : timelim));
  74         if ((child = fork()) == 0) {
  75                 /*
  76                  * ignore this stuff for aborts
  77                  */
  78                 (void)signal(SIGALRM, SIG_IGN);
  79                 (void)signal(SIGINT, SIG_IGN);
  80                 (void)signal(SIGQUIT, SIG_IGN);
  81                 (void)sleep(2);
  82                 nw = write(dn, num, (size_t)(lt = strlen(num)));
  83                 exit(nw != lt);
  84         }
  85         /*
  86          * open line - will return on carrier
  87          */
  88         if ((FD = open(DV, O_RDWR)) < 0) {
  89                 if (errno == EIO)
  90                         (void)printf("lost carrier...");
  91                 else
  92                         (void)printf("dialup line open failed...");
  93                 (void)alarm(0);
  94                 (void)kill(child, SIGKILL);
  95                 (void)close(dn);
  96                 return (0);
  97         }
  98         (void)alarm(0);
  99         (void)tcgetattr(dn, &cntrl);
 100         cntrl.c_cflag |= HUPCL;
 101         (void)tcsetattr(dn, TCSANOW, &cntrl);
 102         (void)signal(SIGALRM, SIG_DFL);
 103         while ((nw = wait(&lt)) != child && nw != -1)
 104                 ;
 105         (void)fflush(stdout);
 106         (void)close(dn);
 107         if (lt != 0) {
 108                 (void)close(FD);
 109                 return (0);
 110         }
 111         return (1);
 112 }
 113
 114 static void
 115 /*ARGSUSED*/
 116 alarmtr(int dummy __unused)
 117 {
 118
 119         (void)alarm(0);
 120         longjmp(jmpbuf, 1);
 121 }
 122
 123 /*
 124  * Insurance, for some reason we don't seem to be
 125  *  hanging up...
 126  */
 127 void
 128 dn_disconnect(void)
 129 {
 130
 131         (void)sleep(2);
 132         if (FD > 0)
 133                 (void)ioctl(FD, TIOCCDTR, 0);
 134         (void)close(FD);
 135 }
 136
 137 void
 138 dn_abort(void)
 139 {
 140
 141         (void)sleep(2);
 142         if (child > 0)
 143                 (void)kill(child, SIGKILL);
 144         if (dn > 0)
 145                 (void)close(dn);
 146         if (FD > 0)
 147                 (void)ioctl(FD, TIOCCDTR, 0);
 148         (void)close(FD);
 149 }