BSD 4_3_Net_2 release

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

/*
* Copyright (c) 1983 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. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. 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.
*/

#ifndef lint
static char sccsid[] = "@(#)acu.c       5.8 (Berkeley) 3/2/91";
#endif /* not lint */

#include "tip.h"

static acu_t *acu = NOACU;
static int conflag;
static void acuabort();
static acu_t *acutype();
static jmp_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()
{
       register char *cp = PN;
       char *phnum, string[256];
       FILE *fd;
       int tried = 0;

       if (!DU) {              /* regular connect message */
               if (CM != NOSTR)
                       pwrite(FD, CM, size(CM));
               logent(value(HOST), "", DV, "call completed");
               return (NOSTR);
       }
       /*
        * @ =>'s use data base in PHONES environment variable
        *        otherwise, use /etc/phones
        */
       signal(SIGINT, acuabort);
       signal(SIGQUIT, acuabort);
       if (setjmp(jmpbuf)) {
               signal(SIGINT, SIG_IGN);
               signal(SIGQUIT, SIG_IGN);
               printf("\ncall aborted\n");
               logent(value(HOST), "", "", "call aborted");
               if (acu != NOACU) {
                       boolean(value(VERBOSE)) = FALSE;
                       if (conflag)
                               disconnect(NOSTR);
                       else
                               (*acu->acu_abort)();
               }
               return ("interrupt");
       }
       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 ((fd = fopen(PH, "r")) == NOFILE) {
                       printf("%s: ", PH);
                       return ("can't open phone number file");
               }
               while (fgets(string, sizeof(string), fd) != NOSTR) {
                       for (cp = string; !any(*cp, " \t\n"); cp++)
                               ;
                       if (*cp == '\n') {
                               fclose(fd);
                               return ("unrecognizable host name");
                       }
                       *cp++ = '\0';
                       if (strcmp(string, value(HOST)))
                               continue;
                       while (any(*cp, " \t"))
                               cp++;
                       if (*cp == '\n') {
                               fclose(fd);
                               return ("missing phone number");
                       }
                       for (phnum = cp; *cp && *cp != ',' && *cp != '\n'; cp++)
                               ;
                       if (*cp)
                               *cp++ = '\0';
                       
                       if (conflag = (*acu->acu_dialer)(phnum, CU)) {
                               fclose(fd);
                               logent(value(HOST), phnum, acu->acu_name,
                                       "call completed");
                               return (NOSTR);
                       } else
                               logent(value(HOST), phnum, acu->acu_name,
                                       "call failed");
                       tried++;
               }
               fclose(fd);
       }
       if (!tried)
               logent(value(HOST), "", acu->acu_name, "missing phone number");
       else
               (*acu->acu_abort)();
       return (tried ? "call failed" : "missing phone number");
}

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

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

static acu_t *
acutype(s)
       register char *s;
{
       register acu_t *p;
       extern acu_t acutable[];

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