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dn11.c revision 1.8 
      1 /*	$NetBSD: dn11.c,v 1.8 2004/03/11 03:33:19 uebayasi 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 1.8 2004/03/11 03:33:19 uebayasi 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 __P((int));
     49 
     50 int
     51 dn_dialer(num, acu)
     52 	char *num, *acu;
     53 {
     54 	int lt, nw;
     55 	int timelim;
     56 	struct termios cntrl;
     57 
     58 	if (boolean(value(VERBOSE)))
     59 		printf("\nstarting call...");
     60 	if ((dn = open(acu, O_WRONLY)) < 0) {
     61 		if (errno == EBUSY)
     62 			printf("line busy...");
     63 		else
     64 			printf("acu open error...");
     65 		return (0);
     66 	}
     67 	if (setjmp(jmpbuf)) {
     68 		kill(child, SIGKILL);
     69 		close(dn);
     70 		return (0);
     71 	}
     72 	signal(SIGALRM, alarmtr);
     73 	timelim = 5 * strlen(num);
     74 	alarm(timelim < 30 ? 30 : timelim);
     75 	if ((child = fork()) == 0) {
     76 		/*
     77 		 * ignore this stuff for aborts
     78 		 */
     79 		signal(SIGALRM, SIG_IGN);
     80 		signal(SIGINT, SIG_IGN);
     81 		signal(SIGQUIT, SIG_IGN);
     82 		sleep(2);
     83 		nw = write(dn, num, lt = strlen(num));
     84 		exit(nw != lt);
     85 	}
     86 	/*
     87 	 * open line - will return on carrier
     88 	 */
     89 	if ((FD = open(DV, O_RDWR)) < 0) {
     90 		if (errno == EIO)
     91 			printf("lost carrier...");
     92 		else
     93 			printf("dialup line open failed...");
     94 		alarm(0);
     95 		kill(child, SIGKILL);
     96 		close(dn);
     97 		return (0);
     98 	}
     99 	alarm(0);
    100 	tcgetattr(dn, &cntrl);
    101 	cntrl.c_cflag |= HUPCL;
    102 	tcsetattr(dn, TCSANOW, &cntrl);
    103 	signal(SIGALRM, SIG_DFL);
    104 	while ((nw = wait(&lt)) != child && nw != -1)
    105 		;
    106 	fflush(stdout);
    107 	close(dn);
    108 	if (lt != 0) {
    109 		close(FD);
    110 		return (0);
    111 	}
    112 	return (1);
    113 }
    114 
    115 static void
    116 alarmtr(dummy)
    117 	int dummy;
    118 {
    119 
    120 	alarm(0);
    121 	longjmp(jmpbuf, 1);
    122 }
    123 
    124 /*
    125  * Insurance, for some reason we don't seem to be
    126  *  hanging up...
    127  */
    128 void
    129 dn_disconnect()
    130 {
    131 
    132 	sleep(2);
    133 	if (FD > 0)
    134 		ioctl(FD, TIOCCDTR, 0);
    135 	close(FD);
    136 }
    137 
    138 void
    139 dn_abort()
    140 {
    141 
    142 	sleep(2);
    143 	if (child > 0)
    144 		kill(child, SIGKILL);
    145 	if (dn > 0)
    146 		close(dn);
    147 	if (FD > 0)
    148 		ioctl(FD, TIOCCDTR, 0);
    149 	close(FD);
    150 }
    151