members.c

/*
 * Copyright (c) 1995-2019 Peter Simons <simons@cryp.to>
 * Copyright (c) 2000-2001 Cable & Wireless GmbH
 * Copyright (c) 1999-2000 CyberSolutions GmbH
 *
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include <config.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <string.h>

#include "libtext/text.h"
#include "petidomo.h"

int
SendSubscriberList(struct Mail * MailStruct,
                   const char * param1,
                   const char * param2,
                   const char * defaultlist)
{
    const struct List_Config * ListConfig;
    FILE *         fh;
    const char *   address = NULL;
    const char *   listname = NULL;
    char           owner[4096];
    char           envelope[4096];
    char *         buffer;
    char *         p;
    int            i;

    /* Try to find out, which parameter is what. */

    if (param1 != NULL) {
        if (isValidListName(param1) == TRUE)
          listname = param1;
    }

    address = (MailStruct->Reply_To) ? MailStruct->Reply_To : MailStruct->From;
    if (listname == NULL && defaultlist != NULL)
      listname = defaultlist;

    if (address == NULL || listname == NULL) {
        syslog(LOG_INFO, "%s: members-command invalid: No list specified.",
            MailStruct->From);
        return 0;
    }

    /* Initialize internal stuff. */

    ListConfig = getListConfig(listname);
    sprintf(owner, "%s-owner@%s", listname, ListConfig->fqdn);
    sprintf(envelope, "%s-owner@%s", listname, ListConfig->fqdn);

    /* Check whether 'members' is allowed for this list. */

    if (isValidAdminPassword(getPassword(), listname) == FALSE &&
        ListConfig->allowmembers == FALSE) {

        syslog(LOG_INFO, "MEMBERS command from \"%s\" has been denied.", address);
        fh = vOpenMailer(envelope, address, owner, NULL);
        if (fh != NULL) {
            fprintf(fh, "From: %s-request@%s (Petidomo Mailing List Server)\n",
                    listname, ListConfig->fqdn);
            fprintf(fh, "To: %s\n", address);
            fprintf(fh, "Cc: %s\n", owner);
            fprintf(fh, "Subject: Petidomo: Request \"members %s\"\n", listname);
            if (MailStruct->Message_Id != NULL)
              fprintf(fh, "In-Reply-To: %s\n", MailStruct->Message_Id);
            fprintf(fh, "Precedence: junk\n");
            fprintf(fh, "Sender: %s\n", envelope);
            fprintf(fh, "\n");
            buffer = text_easy_sprintf(
"The MEMBERS command has been disabled for this mailing list, I am " \
"afraid. If there's a certain reason, why you need to know the list " \
"of subscribed addresses, please contact the mailing list administrator " \
"under the address \"%s\" instead.", owner);
            text_wordwrap(buffer, 70);
            fprintf(fh, "%s\n", buffer);
            CloseMailer(fh);
        }
        else

    syslog(LOG_ERR, "Failed to send mail to \"%s\"", address);
        return 0;
    }

    /* Okay, send the address list back. */

    buffer = loadfile(ListConfig->address_file);
    if (buffer == NULL)
        {
        syslog(LOG_ERR, "Failed to open file \"%s\"", ListConfig->address_file);
        return -1;
        }

    fh = vOpenMailer(envelope, address, NULL);
    if (fh != NULL) {
        fprintf(fh, "From: %s-request@%s (Petidomo Mailing List Server)\n",
                listname, ListConfig->fqdn);
        fprintf(fh, "To: %s\n", address);
        fprintf(fh, "Subject: Petidomo: Request \"members %s\"\n", listname);
        if (MailStruct->Message_Id != NULL)
          fprintf(fh, "In-Reply-To: %s\n", MailStruct->Message_Id);
        fprintf(fh, "Precedence: junk\n");
        fprintf(fh, "Sender: %s\n", envelope);
        fprintf(fh, "\n");
        fprintf(fh, "Subscribers of list \"%s\":\n", listname);
        fprintf(fh, "=======================");
        fflush(fh);
        for (i = 0; i < strlen(listname); i++) {
            fputc('=', fh);
        }
        fputc('\n', fh);
        for (p = buffer; *p; p++) {
            if (isspace((int)*p)) {
                fputc('\n', fh);
                while (*p != '\0' && *p != '\n')
                  p++;
            }
            else {
              fputc(*p, fh);
            }
        }
        CloseMailer(fh);
    }
    else {
        free(buffer);
        syslog(LOG_ERR, "Failed to send email to \"%s\"!", address);
        return -1;
    }

    free(buffer);
    return 0;
}