BSD 4_2 release

[unix-history] / usr / src / usr.bin / tip / aculib / biz22.c

#ifndef lint
static char sccsid[] = "@(#)biz22.c     4.4 (Berkeley) 6/25/83";
#endif

#include "tip.h"

#define DISCONNECT_CMD  "\20\04"        /* disconnection string */

static  int sigALRM();
static  int timeout = 0;
static  jmp_buf timeoutbuf;

/*
* Dial up on a BIZCOMP Model 1022 with either
*      tone dialing (mod = "V")
*      pulse dialing (mod = "W")
*/
static int
biz_dialer(num, mod)
       char *num, *mod;
{
       register int connected = 0;
       char cbuf[40];

       if (boolean(value(VERBOSE)))
               printf("\nstarting call...");
       /*
        * Disable auto-answer and configure for tone/pulse
        *  dialing
        */
       if (cmd("\02K\r")) {
               printf("can't initialize bizcomp...");
               return (0);
       }
       strcpy(cbuf, "\02.\r");
       cbuf[1] = *mod;
       if (cmd(cbuf)) {
               printf("can't set dialing mode...");
               return (0);
       }
       strcpy(cbuf, "\02D");
       strcat(cbuf, num);
       strcat(cbuf, "\r");
       write(FD, cbuf, strlen(cbuf));
       if (!detect("7\r")) {
               printf("can't get dial tone...");
               return (0);
       }
       if (boolean(value(VERBOSE)))
               printf("ringing...");
       /*
        * The reply from the BIZCOMP should be:
        *      2 \r or 7 \r    failure
        *      1 \r            success
        */
       connected = detect("1\r");
#ifdef ACULOG
       if (timeout) {
               char line[80];

               sprintf(line, "%d second dial timeout",
                       number(value(DIALTIMEOUT)));
               logent(value(HOST), num, "biz1022", line);
       }
#endif
       if (timeout)
               biz22_disconnect();     /* insurance */
       return (connected);
}

biz22w_dialer(num, acu)
       char *num, *acu;
{

       return (biz_dialer(num, "W"));
}

biz22f_dialer(num, acu)
       char *num, *acu;
{

       return (biz_dialer(num, "V"));
}

biz22_disconnect()
{
       int rw = 2;

       write(FD, DISCONNECT_CMD, 4);
       sleep(2);
       ioctl(FD, TIOCFLUSH, &rw);
}

biz22_abort()
{

       write(FD, "\02", 1);
}

static int
sigALRM()
{

       timeout = 1;
       longjmp(timeoutbuf, 1);
}

static int
cmd(s)
       register char *s;
{
       char c;
       int (*f)();

       write(FD, s, strlen(s));
       f = signal(SIGALRM, sigALRM);
       if (setjmp(timeoutbuf)) {
               biz22_abort();
               signal(SIGALRM, f);
               return (1);
       }
       alarm(number(value(DIALTIMEOUT)));
       read(FD, &c, 1);
       alarm(0);
       signal(SIGALRM, f);
       c &= 0177;
       return (c != '\r');
}

static int
detect(s)
       register char *s;
{
       char c;
       int (*f)();

       f = signal(SIGALRM, sigALRM);
       timeout = 0;
       while (*s) {
               if (setjmp(timeoutbuf)) {
                       biz22_abort();
                       break;
               }
               alarm(number(value(DIALTIMEOUT)));
               read(FD, &c, 1);
               alarm(0);
               c &= 0177;
               if (c != *s++)
                       return (0);
       }
       signal(SIGALRM, f);
       return (timeout == 0);
}