/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved. The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

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

void    alarmtr(void);

static sigjmp_buf       jmpbuf;
static int      child = -1, dn;

int
dn_dialer(char *num, char *acu)
{
        int lt, nw;
        int timelim;
        struct termios buf;

        if (boolean(value(VERBOSE)))
                (void) printf("\nstarting call...");
        if ((dn = open(acu, 1)) < 0) {
                if (errno == EBUSY)
                        (void) printf("line busy...");
                else
                        (void) printf("acu open error...");
                return (0);
        }
        if (sigsetjmp(jmpbuf, 1)) {
                (void) kill(child, SIGKILL);
                (void) close(dn);
                return (0);
        }
        (void) signal(SIGALRM, (sig_handler_t)alarmtr);
        timelim = 5 * strlen(num);
        (void) alarm(timelim < 30 ? 30 : timelim);
        if ((child = fork()) == 0) {
                /*
                 * ignore this stuff for aborts
                 */
                (void) signal(SIGALRM, SIG_IGN);
                (void) signal(SIGINT, SIG_IGN);
                (void) signal(SIGQUIT, SIG_IGN);
                (void) 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)
                        (void) printf("lost carrier...");
                else
                        (void) printf("dialup line open failed...");
                (void) alarm(0);
                (void) kill(child, SIGKILL);
                (void) close(dn);
                return (0);
        }
        (void) alarm(0);
        (void) ioctl(dn, TCGETS, &buf);
        buf.c_cflag |= HUPCL;
        (void) ioctl(dn, TCSETSF, &buf);
        (void) signal(SIGALRM, SIG_DFL);
        while ((nw = wait(&lt)) != child && nw != -1)
                ;
        (void) fflush(stdout);
        (void) close(dn);
        if (lt != 0) {
                (void) close(FD);
                return (0);
        }
        return (1);
}

void
alarmtr(void)
{

        (void) alarm(0);
        siglongjmp(jmpbuf, 1);
}

/*
 * Insurance, for some reason we don't seem to be
 *  hanging up...
 */
void
dn_disconnect(void)
{
        int dtr = TIOCM_DTR;

        (void) sleep(2);
        if (FD > 0)
                (void) ioctl(FD, TIOCMBIC, &dtr);
        (void) close(FD);
}

void
dn_abort(void)
{
        int dtr = TIOCM_DTR;

        (void) sleep(2);
        if (child > 0)
                (void) kill(child, SIGKILL);
        if (dn > 0)
                (void) close(dn);
        if (FD > 0)
                (void) ioctl(FD, TIOCMBIC, &dtr);
        (void) close(FD);
}