cmd/tip/acu.c

/*
 * 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"

#include "tip.h"

extern acu_t    acutable[];

static acu_t *acu = NOACU;
static int conflag;
static void acuabort(int);
static acu_t *acutype(char *);
static sigjmp_buf jmpbuf;

/*
 * Establish connection for tip
 *
 * If DU is true, we should dial an ACU whose type is AT.
 * The phone numbers are in PN, and the call unit is in CU.
 *
 * If the PN is an '@', then we consult the PHONES file for
 *   the phone numbers.  This file is /etc/phones, unless overriden
 *   by an exported shell variable.
 *
 * The data base files must be in the format:
 *  host-name[ \t]*phone-number
 *   with the possibility of multiple phone numbers
 *   for a single host acting as a rotary (in the order
 *   found in the file).
 */
char *
connect(void)
{
    char *cp = PN;
    char *phnum, string[256];
    int tried = 0;

    if (!DU)
        return (NOSTR);
    /*
     * @ =>'s use data base in PHONES environment variable
     *    otherwise, use /etc/phones
     */
    if (sigsetjmp(jmpbuf, 1)) {
        (void) signal(SIGINT, SIG_IGN);
        (void) signal(SIGQUIT, SIG_IGN);
        (void) printf("\ncall aborted\n");
        logent(value(HOST), "", "", "call aborted");
        if (acu != NOACU) {
            boolean(value(VERBOSE)) = FALSE;
            if (conflag)
                disconnect(NOSTR);
            else
                (*acu->acu_abort)();
        }
        myperm();
        delock(uucplock);
        exit(1);
    }
    (void) signal(SIGINT, acuabort);
    (void) signal(SIGQUIT, acuabort);
    if ((acu = acutype(AT)) == NOACU)
        return ("unknown ACU type");
    if (*cp != '@') {
        while (*cp) {
            for (phnum = cp; *cp && *cp != '|'; cp++)
                ;
            if (*cp)
                *cp++ = '\0';

            if (conflag = (*acu->acu_dialer)(phnum, CU)) {
                logent(value(HOST), phnum, acu->acu_name,
                    "call completed");
                return (NOSTR);
            } else
                logent(value(HOST), phnum, acu->acu_name,
                    "call failed");
            tried++;
        }
    } else {
        if (phfd == NOFILE) {
            (void) printf("%s: ", PH);
            return ("can't open phone number file");
        }
        rewind(phfd);
        while (fgets(string, sizeof (string), phfd) != NOSTR) {
            if (string[0] == '#')
                continue;
            for (cp = string; !any(*cp, " \t\n"); cp++)
                ;
            if (*cp == '\n')
                return ("unrecognizable host name");
            *cp++ = '\0';
            if (!equal(string, value(HOST)))
                continue;
            while (any(*cp, " \t"))
                cp++;
            if (*cp == '\n')
                return ("missing phone number");
            for (phnum = cp; *cp && *cp != '|' && *cp != '\n'; cp++)
                ;
            *cp = '\0';

            if (conflag = (*acu->acu_dialer)(phnum, CU)) {
                logent(value(HOST), phnum, acu->acu_name,
                    "call completed");
                return (NOSTR);
            } else
                logent(value(HOST), phnum, acu->acu_name,
                    "call failed");
            tried++;
        }
    }
    if (!tried)
        logent(value(HOST), "", acu->acu_name, "missing phone number");
    else
        (*acu->acu_abort)();
    return (tried ? "call failed" : "missing phone number");
}

void
disconnect(char *reason)
{
    if (!conflag)
        return;
    if (reason == NOSTR) {
        logent(value(HOST), "", acu->acu_name, "call terminated");
        if (boolean(value(VERBOSE)))
            (void) printf("\r\ndisconnecting...");
    } else
        logent(value(HOST), "", acu->acu_name, reason);
    (*acu->acu_disconnect)();
}

static void
acuabort(int s)
{
    (void) signal(s, SIG_IGN);
    siglongjmp(jmpbuf, 1);
}

static acu_t *
acutype(char *s)
{
    acu_t *p;

    if (s != NOSTR)
        for (p = acutable; p->acu_name != '\0'; p++)
            if (equal(s, p->acu_name))
                return (p);
    return (NOACU);
}