archive.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 <stdlib.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>

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

int
ArchiveMail(const struct Mail * MailStruct, const char * listname)
    {
    const struct List_Config * ListConfig;
    struct stat   sb;
    FILE *        fh;
    char *        filename;
    unsigned int  counter;
    int           rc;
    struct tm *   timeptr;
    char *        date;
    time_t        t;

    assert(MailStruct != NULL);
    assert(listname != NULL);

    /* Initialize internals. */

    ListConfig = getListConfig(listname);
    t = time(NULL);
    timeptr = localtime(&t);
    date = asctime(timeptr);
    rc = -1;

    /* Sanity checks. */

    if (ListConfig->archivepath == NULL)
        return 0;

    /* Check whether we have a file or a directory. */

    if (stat(ListConfig->archivepath, &sb) == 0 && (sb.st_mode & S_IFDIR) != 0)
        {

        /* Read the "active"-file to see at what article number we
           were. */

        filename = text_easy_sprintf("%s/.active", ListConfig->archivepath);
        fh = fopen(filename, "r");
        if (fh != NULL)
            {
            fscanf(fh, "%u", &counter);
            fclose(fh);
            }
        else
            {
            if (errno != ENOENT)
                syslog(LOG_ERR, "Failed to read file \"%s\": %s", filename,  strerror(errno));
            else
                counter = 0;
            }

        /* Store the article. */

        do
            {
            filename = text_easy_sprintf("%s/%u", ListConfig->archivepath, counter);
            if (stat(filename, &sb) == -1)
                {
                if (errno == ENOENT)
                    {
                    fh = fopen(filename, "a");
                    if (fh != NULL)
                        {
                        fprintf(fh, "From %s-owner@%s  %s", listname, ListConfig->fqdn, date);
                        fprintf(fh, "%s\n", MailStruct->Header);
                        fprintf(fh, "%s\n", MailStruct->Body);
                        fclose(fh);
                        rc = 0;
                        }
                    else
                        syslog(LOG_ERR, "Failed opening file \"%s\" for writing: %s", filename, strerror(errno));
                    break;
                    }
                else
                    {
                    syslog(LOG_ERR, "An error while trying to access the log " \
                           "directory \"%s\": %s", ListConfig->archivepath,  strerror(errno));
                    break;
                    }
                }
            }
        while (++counter);      /* until break */

        /* Write the current "active" number back to the file. */

        counter++;
        filename = text_easy_sprintf("%s/.active", ListConfig->archivepath);
        fh = fopen(filename, "w");
        if (fh != NULL)
            {
            fprintf(fh, "%u", counter);
            fclose(fh);
            }
        else
            syslog(LOG_ERR, "Failed to write to file \"%s\": %s", filename, strerror(errno));
        }
    else
        {

        /* Simply append the article to this file. */

        fh = fopen(ListConfig->archivepath, "a");
        if (fh != NULL)
            {
            /* Write an envelope first. */

            fprintf(fh, "From %s-owner@%s  %s", listname, ListConfig->fqdn, date);
            fprintf(fh, "%s\n", MailStruct->Header);
            fprintf(fh, "%s\n", MailStruct->Body);
            fclose(fh);
            rc = 0;
            }
        else
            syslog(LOG_ERR, "Failed opening file \"%s\" for writing: %s", ListConfig->archivepath, strerror(errno));
        }

    return rc;
    }