mta_sendmail.c

snmp的源代码,已经在我的ubuntu下编译通过

        switch (line[0]) {

        case 'M':

            if (mailers < MAXMAILERS) {
                for (i = 1;
                     line[i] != ',' && !isspace(line[i]) && line[i] != '\0'
                     && i <= MNAMELEN; i++) {
                    mailernames[mailers][i - 1] = line[i];
                }
                mailernames[mailers][i - 1] = '\0';

                DEBUGMSGTL(("mibII/mta_sendmail.c:read_sendmailcf",
                            "found mailer \"%s\"\n",
                            mailernames[mailers]));

                for (i = 0;
                     i < mailers
                     && strcmp(mailernames[mailers], mailernames[i]) != 0;
                     i++) {
                    /*
                     * nothing to do 
                     */
                }

                if (i == mailers) {
                    mailers++;
                } else {
                    if (i < 3) {
                        DEBUGMSGTL(("mibII/mta_sendmail.c:read_sendmailcf",
                                    "mailer \"%s\" already existed, but since it's one of the predefined mailers, that's probably nothing to worry about\n",
                                    mailernames[mailers]));
                    } else {
                        DEBUGMSGTL(("mibII/mta_sendmail.c:read_sendmailcf",
                                    "mailer \"%s\" already existed\n",
                                    mailernames[mailers]));
                    }
                    mailernames[mailers][0] = '\0';
                }
            } else {
                print_error(LOG_WARNING, config, FALSE,
                            "mibII/mta_sendmail.c:read_sendmailcf",
                            "found too many mailers in config file \"%s\"",
                            sendmailcf_fn);
            }


            break;

        case 'O':
            switch (line[1]) {
            case ' ':
                /*
                 * long option 
                 */
                if (strncasecmp(line + 2, "StatusFile", 10) == 0) {
                    filename = line + 12;
                } else if (strncasecmp(line + 2, "QueueDirectory", 14) ==
                           0) {
                    filename = line + 16;
                } else {
                    /*
                     * not an option we care about 
                     */
                    break;
                }

                /*
                 * make sure it's the end of the option 
                 */
                if (*filename != ' ' && *filename != '=')
                    break;

                /*
                 * skip WS 
                 */
                while (*filename == ' ')
                    filename++;

                /*
                 * must be O <option> = <file> 
                 */
                if (*filename++ != '=') {
                    print_error(LOG_WARNING, config, FALSE,
                                "mibII/mta_sendmail.c:read_sendmailcf",
                                "line %d in config file \"%s\" ist missing an '='",
                                linenr, sendmailcf_fn);
                    break;
                }

                /*
                 * skip WS 
                 */
                while (*filename == ' ')
                    filename++;

                if (strlen(filename) > FILENAMELEN) {
                    print_error(LOG_WARNING, config, FALSE,
                                "mibII/mta_sendmail.c:read_sendmailcf",
                                "line %d config file \"%s\" contains a filename that's too long",
                                linenr, sendmailcf_fn);
                    break;
                }

                if (strncasecmp(line + 2, "StatusFile", 10) == 0) {
                    strncpy(sendmailst_fn, filename, sizeof(sendmailst_fn));
                    sendmailst_fn[ sizeof(sendmailst_fn)-1 ] = 0;
                    found_sendmailst = TRUE;
                    DEBUGMSGTL(("mibII/mta_sendmail.c:read_sendmailcf",
                                "found statatistics file \"%s\"\n",
                                sendmailst_fn));
                } else if (strncasecmp(line + 2, "QueueDirectory", 14) ==
                           0) {
                    add_queuegroup("mqueue", filename);
                } else {
                    print_error(LOG_CRIT, config, FALSE,
                                "mibII/mta_sendmail.c:read_sendmailcf",
                                "This shouldn't happen.");
                    abort();
                }
                break;

            case 'S':
                if (strlen(line + 2) > FILENAMELEN) {
                    print_error(LOG_WARNING, config, FALSE,
                                "mibII/mta_sendmail.c:read_sendmailcf",
                                "line %d config file \"%s\" contains a filename that's too long",
                                linenr, sendmailcf_fn);
                    break;
                }
                strcpy(sendmailst_fn, line + 2);
                found_sendmailst = TRUE;
                DEBUGMSGTL(("mibII/mta_sendmail.c:read_sendmailcf",
                            "found statatistics file \"%s\"\n",
                            sendmailst_fn));
                break;

            case 'Q':
                if (strlen(line + 2) > FILENAMELEN) {
                    print_error(LOG_WARNING, config, FALSE,
                                "mibII/mta_sendmail.c:read_sendmailcf",
                                "line %d config file \"%s\" contains a filename that's too long",
                                linenr, sendmailcf_fn);
                    break;
                }

                add_queuegroup("mqueue", line + 2);
                break;
            }
            break;

        case 'Q':
            /*
             * found a queue group 
             */
            p = qgname = line + 1;
            while (*p && *p != ',') {
                p++;
            }
            if (*p == '\0') {
                print_error(LOG_WARNING, config, FALSE,
                            "mibII/mta_sendmail.c:read_sendmailcf",
                            "line %d config file \"%s\" contains a weird queuegroup",
                            linenr, sendmailcf_fn);
                break;
            }

            /*
             * look for the directory 
             */
            filename = NULL;
            *p++ = '\0';
            while (*p != '\0') {
                /*
                 * skip WS 
                 */
                while (*p && *p == ' ')
                    p++;

                if (*p == 'P') {        /* found path */
                    while (*p && *p != '=')
                        p++;
                    if (*p++ != '=') {
                        print_error(LOG_WARNING, config, FALSE,
                                    "mibII/mta_sendmail.c:read_sendmailcf",
                                    "line %d config file \"%s\" contains a weird queuegroup",
                                    linenr, sendmailcf_fn);
                        break;
                    }
                    filename = p;

                    /*
                     * find next ',', turn into \0 
                     */
                    while (*p && *p != ',')
                        p++;
                    *p = '\0';
                }

                /*
                 * skip to next , 
                 */
                while (*p && *p != ',') {
                    p++;
                }
            }

            /*
             * we found a directory 
             */
            if (filename) {
                add_queuegroup(qgname, filename);
            } else {
                print_error(LOG_WARNING, config, FALSE,
                            "mibII/mta_sendmail.c:read_sendmailcf",
                            "line %d config file \"%s\" contains a weird queuegroup: no directory",
                            linenr, sendmailcf_fn);
            }

            break;
        }

        linenr++;
    }

    for (i = 0; i < 10 && fclose(sendmailcf_fp) != 0; i++) {
        /*
         * nothing to do 
         */
    }

    for (i = mailers; i < MAXMAILERS; i++) {
        mailernames[i][0] = '\0';
    }

    if (found_sendmailst) {
        open_sendmailst(config);
    }

    return TRUE;
}

 /**/
/** static void mta_sendmail_parse_config(const char* token, char *line)
 *
 *  Description:
 *
 *    Called by the agent for each configuration line that belongs to this module.
 *    The possible tokens are:
 *
 *    sendmail_config  - filename of the sendmail configutarion file
 *    sendmail_stats   - filename of the sendmail statistics file
 *    sendmail_queue   - name of the sendmail mailqueue directory
 *    sendmail_index   - the ApplIndex to use for the table
 *    sendmail_stats_t - the time (in seconds) to cache statistics
 *    sendmail_queue_t - the time (in seconds) to cache the directory scanning results
 *
 *    For "sendmail_config", "sendmail_stats" and "sendmail_queue", the copy_nword
 *    function is used to copy the filename.
 *
 *  Parameters:
 *
 *    token: first word of the line
 *
 *    line:  rest of the line
 *
 *  Returns:
 *
 *    nothing
 *
 */
    static void
mta_sendmail_parse_config(const char *token, char *line)
{
    if (strlen(line) > FILENAMELEN) {   /* Might give some false alarm, but better to be safe than sorry */
        config_perror("line too long");
        return;
    }

    if (strcasecmp(token, "sendmail_stats") == 0) {
        while (isspace(*line)) {
            line++;
        }
        copy_nword(line, sendmailst_fn, sizeof(sendmailst_fn));

        open_sendmailst(TRUE);

        if (sendmailst_fh == -1) {
            char            str[FILENAMELEN + 50];
            sprintf(str, "couldn't open file \"%s\"", sendmailst_fn);
            config_perror(str);
            return;
        }

        DEBUGMSGTL(("mibII/mta_sendmail.c:mta_sendmail_parse_config",
                    "opened statistics file \"%s\"\n", sendmailst_fn));
        return;
    } else if (strcasecmp(token, "sendmail_config") == 0) {
        while (isspace(*line)) {
            line++;
        }
        copy_nword(line, sendmailcf_fn, sizeof(sendmailcf_fn));

        read_sendmailcf(TRUE);

        DEBUGMSGTL(("mibII/mta_sendmail.c:mta_sendmail_parse_config",
                    "read config file \"%s\"\n", sendmailcf_fn));
        return;
    } else if (strcasecmp(token, "sendmail_queue") == 0) {
        while (isspace(*line)) {
            line++;
        }
        add_queuegroup("mqueue", line);

        return;
    } else if (strcasecmp(token, "sendmail_index") == 0) {
        while (isspace(*line)) {
            line++;
        }
        applindex = atol(line);
        if (applindex < 1) {
            config_perror("invalid index number");
            applindex = 1;
        }
    } else if (strcasecmp(token, "sendmail_stats_t") == 0) {
        while (isspace(*line)) {
            line++;
        }
        stat_cache_time = atol(line);
        if (stat_cache_time < 1) {
            config_perror("invalid cache time");
            applindex = 5;
        }
    } else if (strcasecmp(token, "sendmail_queue_t") == 0) {
        while (isspace(*line)) {
            line++;
        }
        dir_cache_time = atol(line);
        if (dir_cache_time < 1) {
            config_perror("invalid cache time");
            applindex = 10;
        }
    } else {
        config_perror
            ("mibII/mta_sendmail.c says: What should I do with that token? Did you ./configure the agent properly?");
    }

    return;
}

 /**/
/** void init_mta_sendmail(void)
 *
 *  Description:
 *
 *    Called by the agent to initialize the module. The function will register
 *    the OID tree and the config handler and try some default values for the
 *    sendmail.cf and sendmail.st files and for the mailqueue directory.
 *
 *  Parameters:
 *
 *    none
 *
 *  Returns:
 *
 *    nothing
 *
 */
    void
init_mta_sendmail(void)
{
    REGISTER_MIB("mibII/mta_sendmail", mta_variables, variable3,
                 mta_variables_oid);

    snmpd_register_config_handler("sendmail_config",
                                  mta_sendmail_parse_config, NULL, "file");
    snmpd_register_config_handler("sendmail_stats",
                                  mta_sendmail_parse_config, NULL, "file");
    snmpd_register_config_handler("sendmail_queue",
                                  mta_sendmail_parse_config, NULL,
                                  "directory");
    snmpd_register_config_handler("sendmail_index",
                                  mta_sendmail_parse_config, NULL,
                                  "integer");