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dn11.c revision 1.3 
      1 /*	$NetBSD: dn11.c,v 1.3 1994/12/08 09:31:40 jtc 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)dn11.c	8.1 (Berkeley) 6/6/93";
     39 #endif
     40 static char rcsid[] = "$NetBSD: dn11.c,v 1.3 1994/12/08 09:31:40 jtc Exp $";
     41 #endif /* not lint */
     42 
     43 /*
     44  * Routines for dialing up on DN-11
     45  */
     46 #include "tip.h"
     47 
     48 int dn_abort();
     49 void alarmtr();
     50 static jmp_buf jmpbuf;
     51 static int child = -1, dn;
     52 
     53 dn_dialer(num, acu)
     54 	char *num, *acu;
     55 {
     56 	extern errno;
     57 	char *p, *q, phone[40];
     58 	int lt, nw, connected = 1;
     59 	register int timelim;
     60 
     61 	if (boolean(value(VERBOSE)))
     62 		printf("\nstarting call...");
     63 	if ((dn = open(acu, 1)) < 0) {
     64 		if (errno == EBUSY)
     65 			printf("line busy...");
     66 		else
     67 			printf("acu open error...");
     68 		return (0);
     69 	}
     70 	if (setjmp(jmpbuf)) {
     71 		kill(child, SIGKILL);
     72 		close(dn);
     73 		return (0);
     74 	}
     75 	signal(SIGALRM, alarmtr);
     76 	timelim = 5 * strlen(num);
     77 	alarm(timelim < 30 ? 30 : timelim);
     78 	if ((child = fork()) == 0) {
     79 		/*
     80 		 * ignore this stuff for aborts
     81 		 */
     82 		signal(SIGALRM, SIG_IGN);
     83 		signal(SIGINT, SIG_IGN);
     84 		signal(SIGQUIT, SIG_IGN);
     85 		sleep(2);
     86 		nw = write(dn, num, lt = strlen(num));
     87 		exit(nw != lt);
     88 	}
     89 	/*
     90 	 * open line - will return on carrier
     91 	 */
     92 	if ((FD = open(DV, 2)) < 0) {
     93 		if (errno == EIO)
     94 			printf("lost carrier...");
     95 		else
     96 			printf("dialup line open failed...");
     97 		alarm(0);
     98 		kill(child, SIGKILL);
     99 		close(dn);
    100 		return (0);
    101 	}
    102 	alarm(0);
    103 	ioctl(dn, TIOCHPCL, 0);
    104 	signal(SIGALRM, SIG_DFL);
    105 	while ((nw = wait(&lt)) != child && nw != -1)
    106 		;
    107 	fflush(stdout);
    108 	close(dn);
    109 	if (lt != 0) {
    110 		close(FD);
    111 		return (0);
    112 	}
    113 	return (1);
    114 }
    115 
    116 void
    117 alarmtr()
    118 {
    119 	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 dn_disconnect()
    128 {
    129 
    130 	sleep(2);
    131 	if (FD > 0)
    132 		ioctl(FD, TIOCCDTR, 0);
    133 	close(FD);
    134 }
    135 
    136 dn_abort()
    137 {
    138 
    139 	sleep(2);
    140 	if (child > 0)
    141 		kill(child, SIGKILL);
    142 	if (dn > 0)
    143 		close(dn);
    144 	if (FD > 0)
    145 		ioctl(FD, TIOCCDTR, 0);
    146 	close(FD);
    147 }
    148