BSD 4_3_Net_2 release

[unix-history] / usr / src / usr.bin / tip / aculib / dn11.c

/*
* Copyright (c) 1983 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
static char sccsid[] = "@(#)dn11.c      5.4 (Berkeley) 3/2/91";
#endif /* not lint */

/*
* Routines for dialing up on DN-11
*/
#include "tip.h"

int dn_abort();
void alarmtr();
static jmp_buf jmpbuf;
static int child = -1, dn;

dn_dialer(num, acu)
       char *num, *acu;
{
       extern errno;
       char *p, *q, phone[40];
       int lt, nw, connected = 1;
       register int timelim;

       if (boolean(value(VERBOSE)))
               printf("\nstarting call...");
       if ((dn = open(acu, 1)) < 0) {
               if (errno == EBUSY)
                       printf("line busy...");
               else
                       printf("acu open error...");
               return (0);
       }
       if (setjmp(jmpbuf)) {
               kill(child, SIGKILL);
               close(dn);
               return (0);
       }
       signal(SIGALRM, alarmtr);
       timelim = 5 * strlen(num);
       alarm(timelim < 30 ? 30 : timelim);
       if ((child = fork()) == 0) {
               /*
                * ignore this stuff for aborts
                */
               signal(SIGALRM, SIG_IGN);
               signal(SIGINT, SIG_IGN);
               signal(SIGQUIT, SIG_IGN);
               sleep(2);
               nw = write(dn, num, lt = strlen(num));
               exit(nw != lt);
       }
       /*
        * open line - will return on carrier
        */
       if ((FD = open(DV, 2)) < 0) {
               if (errno == EIO)
                       printf("lost carrier...");
               else
                       printf("dialup line open failed...");
               alarm(0);
               kill(child, SIGKILL);
               close(dn);
               return (0);
       }
       alarm(0);
       ioctl(dn, TIOCHPCL, 0);
       signal(SIGALRM, SIG_DFL);
       while ((nw = wait(&lt)) != child && nw != -1)
               ;
       fflush(stdout);
       close(dn);
       if (lt != 0) {
               close(FD);
               return (0);
       }
       return (1);
}

void
alarmtr()
{
       alarm(0);
       longjmp(jmpbuf, 1);
}

/*
* Insurance, for some reason we don't seem to be
*  hanging up...
*/
dn_disconnect()
{

       sleep(2);
       if (FD > 0)
               ioctl(FD, TIOCCDTR, 0);
       close(FD);
}

dn_abort()
{

       sleep(2);
       if (child > 0)
               kill(child, SIGKILL);
       if (dn > 0)
               close(dn);
       if (FD > 0)
               ioctl(FD, TIOCCDTR, 0);
       close(FD);
}