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dn11.c revision 1.5 
      1 /*	$NetBSD: dn11.c,v 1.5 1997/11/22 07:28:55 lukem 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 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)dn11.c	8.1 (Berkeley) 6/6/93";
     40 #endif
     41 __RCSID("$NetBSD: dn11.c,v 1.5 1997/11/22 07:28:55 lukem Exp $");
     42 #endif /* not lint */
     43 
     44 /*
     45  * Routines for dialing up on DN-11
     46  */
     47 #include "tip.h"
     48 
     49 static jmp_buf jmpbuf;
     50 static int child = -1, dn;
     51 
     52 static	void	alarmtr __P((int));
     53 
     54 int
     55 dn_dialer(num, acu)
     56 	char *num, *acu;
     57 {
     58 	int lt, nw;
     59 	int timelim;
     60 	struct termios cntrl;
     61 
     62 	if (boolean(value(VERBOSE)))
     63 		printf("\nstarting call...");
     64 	if ((dn = open(acu, 1)) < 0) {
     65 		if (errno == EBUSY)
     66 			printf("line busy...");
     67 		else
     68 			printf("acu open error...");
     69 		return (0);
     70 	}
     71 	if (setjmp(jmpbuf)) {
     72 		kill(child, SIGKILL);
     73 		close(dn);
     74 		return (0);
     75 	}
     76 	signal(SIGALRM, alarmtr);
     77 	timelim = 5 * strlen(num);
     78 	alarm(timelim < 30 ? 30 : timelim);
     79 	if ((child = fork()) == 0) {
     80 		/*
     81 		 * ignore this stuff for aborts
     82 		 */
     83 		signal(SIGALRM, SIG_IGN);
     84 		signal(SIGINT, SIG_IGN);
     85 		signal(SIGQUIT, SIG_IGN);
     86 		sleep(2);
     87 		nw = write(dn, num, lt = strlen(num));
     88 		exit(nw != lt);
     89 	}
     90 	/*
     91 	 * open line - will return on carrier
     92 	 */
     93 	if ((FD = open(DV, 2)) < 0) {
     94 		if (errno == EIO)
     95 			printf("lost carrier...");
     96 		else
     97 			printf("dialup line open failed...");
     98 		alarm(0);
     99 		kill(child, SIGKILL);
    100 		close(dn);
    101 		return (0);
    102 	}
    103 	alarm(0);
    104 	tcgetattr(dn, &cntrl);
    105 	cntrl.c_cflag |= HUPCL;
    106 	tcsetattr(dn, TCSANOW, &cntrl);
    107 	signal(SIGALRM, SIG_DFL);
    108 	while ((nw = wait(&lt)) != child && nw != -1)
    109 		;
    110 	fflush(stdout);
    111 	close(dn);
    112 	if (lt != 0) {
    113 		close(FD);
    114 		return (0);
    115 	}
    116 	return (1);
    117 }
    118 
    119 static void
    120 alarmtr(dummy)
    121 	int dummy;
    122 {
    123 	alarm(0);
    124 	longjmp(jmpbuf, 1);
    125 }
    126 
    127 /*
    128  * Insurance, for some reason we don't seem to be
    129  *  hanging up...
    130  */
    131 void
    132 dn_disconnect()
    133 {
    134 
    135 	sleep(2);
    136 	if (FD > 0)
    137 		ioctl(FD, TIOCCDTR, 0);
    138 	close(FD);
    139 }
    140 
    141 void
    142 dn_abort()
    143 {
    144 
    145 	sleep(2);
    146 	if (child > 0)
    147 		kill(child, SIGKILL);
    148 	if (dn > 0)
    149 		close(dn);
    150 	if (FD > 0)
    151 		ioctl(FD, TIOCCDTR, 0);
    152 	close(FD);
    153 }
    154