/*      $OpenBSD: cu.c,v 1.19 2006/05/25 08:41:52 jmc Exp $     */
/*      $NetBSD: cu.c,v 1.5 1997/02/11 09:24:05 mrg Exp $       */

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1983, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "tip.h"

static void     cuusage(void);

/*
 * Botch the interface to look like cu's
 */
void
cumain(int argc, char *argv[])
{
        int ch, i, parity;
        long l;
        char *cp;
        static char sbuf[12];

        if (argc < 2)
                cuusage();
        CU = DV = NOSTR;
        BR = DEFBR;
        parity = 0;     /* none */

        /*
         * We want to accept -# as a speed.  It's easiest to look through
         * the arguments, replace -# with -s#, and let getopt() handle it.
         */
        for (i = 1; i < argc; i++) {
                if (argv[i][0] == '-' &&
                    argv[i][1] >= '0' && argv[i][1] <= '9') {
                        asprintf(&cp, "-s%s", argv[i] + 1);
                        if (cp == NULL) {
                                fprintf(stderr,
                                    "%s: cannot convert -# to -s#\n",
                                    __progname);
                                exit(3);
                        }
                        argv[i] = cp;
                }
        }

        while ((ch = getopt(argc, argv, "a:l:s:htoe")) != -1) {
                switch (ch) {
                case 'a':
                        CU = optarg;
                        break;
                case 'l':
                        if (DV != NULL) {
                                fprintf(stderr,
                                    "%s: cannot specificy multiple -l options\n",
                                    __progname);
                                exit(3);
                        }
                        if (strchr(optarg, '/'))
                                DV = optarg;
                        else
                                asprintf(&DV, "/dev/%s", optarg);
                        break;
                case 's':
                        l = strtol(optarg, &cp, 10);
                        if (*cp != '\0' || l < 0 || l >= INT_MAX) {
                                fprintf(stderr, "%s: unsupported speed %s\n",
                                    __progname, optarg);
                                exit(3);
                        }
                        BR = (int)l;
                        break;
                case 'h':
                        setboolean(value(LECHO), TRUE);
                        HD = TRUE;
                        break;
                case 't':
                        HW = 1, DU = -1;
                        break;
                case 'o':
                        if (parity != 0)
                                parity = 0;     /* -e -o */
                        else
                                parity = 1;     /* odd */
                        break;
                case 'e':
                        if (parity != 0)
                                parity = 0;     /* -o -e */
                        else
                                parity = -1;    /* even */
                        break;
                default:
                        cuusage();
                        break;
                }
        }
        argc -= optind;
        argv += optind;

        switch (argc) {
        case 1:
                PN = argv[0];
                break;
        case 0:
                break;
        default:
                cuusage();
                break;
        }

        signal(SIGINT, cleanup);
        signal(SIGQUIT, cleanup);
        signal(SIGHUP, cleanup);
        signal(SIGTERM, cleanup);
        signal(SIGCHLD, SIG_DFL);

        /*
         * The "cu" host name is used to define the
         * attributes of the generic dialer.
         */
        (void)snprintf(sbuf, sizeof(sbuf), "cu%ld", BR);
        if ((i = hunt(sbuf)) == 0) {
                printf("all ports busy\n");
                exit(3);
        }
        if (i == -1) {
                printf("link down\n");
                (void)uu_unlock(uucplock);
                exit(3);
        }
        setbuf(stdout, NULL);
        loginit();
        user_uid();
        vinit();
        switch (parity) {
        case -1:
                setparity("even");
                break;
        case 1:
                setparity("odd");
                break;
        default:
                setparity("none");
                break;
        }
        setboolean(value(VERBOSE), FALSE);
        if (HW && ttysetup(BR)) {
                fprintf(stderr, "%s: unsupported speed %ld\n",
                    __progname, BR);
                daemon_uid();
                (void)uu_unlock(uucplock);
                exit(3);
        }
        if (con()) {
                printf("Connect failed\n");
                daemon_uid();
                (void)uu_unlock(uucplock);
                exit(1);
        }
        if (!HW && ttysetup(BR)) {
                fprintf(stderr, "%s: unsupported speed %ld\n",
                    __progname, BR);
                daemon_uid();
                (void)uu_unlock(uucplock);
                exit(3);
        }
}

static void
cuusage(void)
{
        fprintf(stderr, "usage: cu [-ehot] [-a acu] [-l line] "
            "[-s speed | -speed] [phone-number]\n");
        exit(8);
}