tip/aculib/dn11.c

	dn11.c revision 8d489c7a815fcac696803219572e95aa01532b0f
/*
 * 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.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 * 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);
}