/*
 * 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.
 */

#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 != NULL; p++)
                        if (equal(s, p->acu_name))
                                return (p);
        return (NOACU);
}