Merge branch 'master' into refactor/check_mrtgraf

5 files changed, 483 insertions, 394 deletions

diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index 38e2ed28..b986af20 100644
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -50,12 +50,14 @@ EXTRA_DIST = t \
                          tests \
                          $(np_test_scripts) \
                          check_swap.d \
+                         check_ldap.d \
                          check_hpjd.d \
                          check_game.d \
                          check_dbi.d \
                          check_ssh.d \
                          check_dns.d \
                          check_mrtgraf.d \
+                         check_mrtg.d \
                          check_apt.d \
                          check_by_ssh.d \
                          check_smtp.d \
diff --git a/plugins/check_ldap.c b/plugins/check_ldap.c
index 87818da6..597644bd 100644
--- a/plugins/check_ldap.c
+++ b/plugins/check_ldap.c
@@ -1,30 +1,30 @@
 /*****************************************************************************
-*
-* Monitoring check_ldap plugin
-*
-* License: GPL
-* Copyright (c) 2000-2024 Monitoring Plugins Development Team
-*
-* Description:
-*
-* This file contains the check_ldap plugin
-*
-*
-* 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/>.
-*
-*
-*****************************************************************************/
+ *
+ * Monitoring check_ldap plugin
+ *
+ * License: GPL
+ * Copyright (c) 2000-2024 Monitoring Plugins Development Team
+ *
+ * Description:
+ *
+ * This file contains the check_ldap plugin
+ *
+ *
+ * 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/>.
+ *
+ *
+ *****************************************************************************/
 
 /* progname may be check_ldaps */
 char *progname = "check_ldap";
@@ -34,209 +34,178 @@ const char *email = "devel@monitoring-plugins.org";
 #include "common.h"
 #include "netutils.h"
 #include "utils.h"
+#include "check_ldap.d/config.h"
 
+#include "states.h"
 #include <lber.h>
 #define LDAP_DEPRECATED 1
 #include <ldap.h>
 
 enum {
-        UNDEFINED = 0,
-#ifdef HAVE_LDAP_SET_OPTION
-        DEFAULT_PROTOCOL = 2,
-#endif
         DEFAULT_PORT = 389
 };
 
-static int process_arguments (int, char **);
-static int validate_arguments (void);
-static void print_help (void);
-void print_usage (void);
-
-static char ld_defattr[] = "(objectclass=*)";
-static char *ld_attr = ld_defattr;
-static char *ld_host = NULL;
-static char *ld_base = NULL;
-static char *ld_passwd = NULL;
-static char *ld_binddn = NULL;
-static int ld_port = -1;
-#ifdef HAVE_LDAP_SET_OPTION
-static int ld_protocol = DEFAULT_PROTOCOL;
-#endif
-#ifndef LDAP_OPT_SUCCESS
-# define LDAP_OPT_SUCCESS LDAP_SUCCESS
-#endif
-static double warn_time = UNDEFINED;
-static double crit_time = UNDEFINED;
-static thresholds *entries_thresholds = NULL;
-static struct timeval tv;
-static char* warn_entries = NULL;
-static char* crit_entries = NULL;
-static bool starttls = false;
-static bool ssl_on_connect = false;
-static bool verbose = false;
-
-/* for ldap tls */
-
-static char *SERVICE = "LDAP";
-
-int
-main (int argc, char *argv[])
-{
-
-        LDAP *ld;
-        LDAPMessage *result;
-
-        /* should be    int result = STATE_UNKNOWN; */
-
-        int status = STATE_UNKNOWN;
-        long microsec;
-        double elapsed_time;
-
-        /* for ldap tls */
+typedef struct {
+        int errorcode;
+        check_ldap_config config;
+} check_ldap_config_wrapper;
+static check_ldap_config_wrapper process_arguments(int /*argc*/, char ** /*argv*/);
+static check_ldap_config_wrapper validate_arguments(check_ldap_config_wrapper /*config_wrapper*/);
 
-        int tls;
-        int version=3;
+static void print_help(void);
+void print_usage(void);
 
-        int status_entries = STATE_OK;
-        int num_entries = 0;
+#ifndef LDAP_OPT_SUCCESS
+#       define LDAP_OPT_SUCCESS LDAP_SUCCESS
+#endif
+static int verbose = 0;
 
-        setlocale (LC_ALL, "");
-        bindtextdomain (PACKAGE, LOCALEDIR);
-        textdomain (PACKAGE);
+int main(int argc, char *argv[]) {
+        setlocale(LC_ALL, "");
+        bindtextdomain(PACKAGE, LOCALEDIR);
+        textdomain(PACKAGE);
 
-        if (strstr(argv[0],"check_ldaps")) {
-                xasprintf (&progname, "check_ldaps");
-        }
+        if (strstr(argv[0], "check_ldaps")) {
+                xasprintf(&progname, "check_ldaps");
+        }
 
         /* Parse extra opts if any */
-        argv=np_extra_opts (&argc, argv, progname);
+        argv = np_extra_opts(&argc, argv, progname);
 
-        if (process_arguments (argc, argv) == ERROR)
-                usage4 (_("Could not parse arguments"));
+        check_ldap_config_wrapper tmp_config = process_arguments(argc, argv);
+        if (tmp_config.errorcode == ERROR) {
+                usage4(_("Could not parse arguments"));
+        }
 
-        if (strstr(argv[0],"check_ldaps") && ! starttls && ! ssl_on_connect)
-                starttls = true;
+        const check_ldap_config config = tmp_config.config;
 
         /* initialize alarm signal handling */
-        signal (SIGALRM, socket_timeout_alarm_handler);
+        signal(SIGALRM, socket_timeout_alarm_handler);
 
         /* set socket timeout */
-        alarm (socket_timeout);
+        alarm(socket_timeout);
 
         /* get the start time */
-        gettimeofday (&tv, NULL);
+        struct timeval start_time;
+        gettimeofday(&start_time, NULL);
 
+        LDAP *ldap_connection;
         /* initialize ldap */
 #ifdef HAVE_LDAP_INIT
-        if (!(ld = ldap_init (ld_host, ld_port))) {
-                printf ("Could not connect to the server at port %i\n", ld_port);
+        if (!(ldap_connection = ldap_init(config.ld_host, config.ld_port))) {
+                printf("Could not connect to the server at port %i\n", config.ld_port);
                 return STATE_CRITICAL;
         }
 #else
-        if (!(ld = ldap_open (ld_host, ld_port))) {
-                if (verbose)
-                        ldap_perror(ld, "ldap_open");
-                printf (_("Could not connect to the server at port %i\n"), ld_port);
+        if (!(ld = ldap_open(config.ld_host, config.ld_port))) {
+                if (verbose) {
+                        ldap_perror(ldap_connection, "ldap_open");
+                }
+                printf(_("Could not connect to the server at port %i\n"), config.ld_port);
                 return STATE_CRITICAL;
         }
 #endif /* HAVE_LDAP_INIT */
 
 #ifdef HAVE_LDAP_SET_OPTION
         /* set ldap options */
-        if (ldap_set_option (ld, LDAP_OPT_PROTOCOL_VERSION, &ld_protocol) !=
-                        LDAP_OPT_SUCCESS ) {
-                printf(_("Could not set protocol version %d\n"), ld_protocol);
+        if (ldap_set_option(ldap_connection, LDAP_OPT_PROTOCOL_VERSION, &config.ld_protocol) != LDAP_OPT_SUCCESS) {
+                printf(_("Could not set protocol version %d\n"), config.ld_protocol);
                 return STATE_CRITICAL;
         }
 #endif
 
-        if (ld_port == LDAPS_PORT || ssl_on_connect) {
-                xasprintf (&SERVICE, "LDAPS");
+        int version = 3;
+        int tls;
+        if (config.ld_port == LDAPS_PORT || config.ssl_on_connect) {
 #if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS)
                 /* ldaps: set option tls */
                 tls = LDAP_OPT_X_TLS_HARD;
 
-                if (ldap_set_option (ld, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
-                {
-                        if (verbose)
-                                ldap_perror(ld, "ldaps_option");
-                        printf (_("Could not init TLS at port %i!\n"), ld_port);
+                if (ldap_set_option(ldap_connection, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS) {
+                        if (verbose) {
+                                ldap_perror(ldap_connection, "ldaps_option");
+                        }
+                        printf(_("Could not init TLS at port %i!\n"), config.ld_port);
                         return STATE_CRITICAL;
                 }
 #else
-                printf (_("TLS not supported by the libraries!\n"));
+                printf(_("TLS not supported by the libraries!\n"));
                 return STATE_CRITICAL;
 #endif /* LDAP_OPT_X_TLS */
-        } else if (starttls) {
-                xasprintf (&SERVICE, "LDAP-TLS");
+        } else if (config.starttls) {
 #if defined(HAVE_LDAP_SET_OPTION) && defined(HAVE_LDAP_START_TLS_S)
                 /* ldap with startTLS: set option version */
-                if (ldap_get_option(ld,LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS )
-                {
-                        if (version < LDAP_VERSION3)
-                        {
+                if (ldap_get_option(ldap_connection, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS) {
+                        if (version < LDAP_VERSION3) {
                                 version = LDAP_VERSION3;
-                                ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &version);
+                                ldap_set_option(ldap_connection, LDAP_OPT_PROTOCOL_VERSION, &version);
                         }
                 }
                 /* call start_tls */
-                if (ldap_start_tls_s(ld, NULL, NULL) != LDAP_SUCCESS)
-                {
-                        if (verbose)
-                                ldap_perror(ld, "ldap_start_tls");
-                        printf (_("Could not init startTLS at port %i!\n"), ld_port);
+                if (ldap_start_tls_s(ldap_connection, NULL, NULL) != LDAP_SUCCESS) {
+                        if (verbose) {
+                                ldap_perror(ldap_connection, "ldap_start_tls");
+                        }
+                        printf(_("Could not init startTLS at port %i!\n"), config.ld_port);
                         return STATE_CRITICAL;
                 }
 #else
-                printf (_("startTLS not supported by the library, needs LDAPv3!\n"));
+                printf(_("startTLS not supported by the library, needs LDAPv3!\n"));
                 return STATE_CRITICAL;
 #endif /* HAVE_LDAP_START_TLS_S */
         }
 
         /* bind to the ldap server */
-        if (ldap_bind_s (ld, ld_binddn, ld_passwd, LDAP_AUTH_SIMPLE) !=
-                        LDAP_SUCCESS) {
-                if (verbose)
-                        ldap_perror(ld, "ldap_bind");
-                printf (_("Could not bind to the LDAP server\n"));
+        if (ldap_bind_s(ldap_connection, config.ld_binddn, config.ld_passwd, LDAP_AUTH_SIMPLE) != LDAP_SUCCESS) {
+                if (verbose) {
+                        ldap_perror(ldap_connection, "ldap_bind");
+                }
+                printf(_("Could not bind to the LDAP server\n"));
                 return STATE_CRITICAL;
         }
 
+        LDAPMessage *result;
+        int num_entries = 0;
         /* do a search of all objectclasses in the base dn */
-        if (ldap_search_s (ld, ld_base, (crit_entries!=NULL || warn_entries!=NULL) ? LDAP_SCOPE_SUBTREE : LDAP_SCOPE_BASE, ld_attr, NULL, 0, &result)
-                        != LDAP_SUCCESS) {
-                if (verbose)
-                        ldap_perror(ld, "ldap_search");
-                printf (_("Could not search/find objectclasses in %s\n"), ld_base);
+        if (ldap_search_s(ldap_connection, config.ld_base,
+                                          (config.crit_entries != NULL || config.warn_entries != NULL) ? LDAP_SCOPE_SUBTREE : LDAP_SCOPE_BASE, config.ld_attr,
+                                          NULL, 0, &result) != LDAP_SUCCESS) {
+                if (verbose) {
+                        ldap_perror(ldap_connection, "ldap_search");
+                }
+                printf(_("Could not search/find objectclasses in %s\n"), config.ld_base);
                 return STATE_CRITICAL;
-        } else if (crit_entries!=NULL || warn_entries!=NULL) {
-                num_entries = ldap_count_entries(ld, result);
+        }
+
+        if (config.crit_entries != NULL || config.warn_entries != NULL) {
+                num_entries = ldap_count_entries(ldap_connection, result);
         }
 
         /* unbind from the ldap server */
-        ldap_unbind (ld);
+        ldap_unbind(ldap_connection);
 
         /* reset the alarm handler */
-        alarm (0);
+        alarm(0);
 
         /* calculate the elapsed time and compare to thresholds */
 
-        microsec = deltime (tv);
-        elapsed_time = (double)microsec / 1.0e6;
-
-        if (crit_time!=UNDEFINED && elapsed_time>crit_time)
+        long microsec = deltime(start_time);
+        double elapsed_time = (double)microsec / 1.0e6;
+        mp_state_enum status = STATE_UNKNOWN;
+        if (config.crit_time_set && elapsed_time > config.crit_time) {
                 status = STATE_CRITICAL;
-        else if (warn_time!=UNDEFINED && elapsed_time>warn_time)
+        } else if (config.warn_time_set && elapsed_time > config.warn_time) {
                 status = STATE_WARNING;
-        else
+        } else {
                 status = STATE_OK;
+        }
 
-        if(entries_thresholds != NULL) {
+        if (config.entries_thresholds != NULL) {
                 if (verbose) {
-                        printf ("entries found: %d\n", num_entries);
-                        print_thresholds("entry thresholds", entries_thresholds);
+                        printf("entries found: %d\n", num_entries);
+                        print_thresholds("entry thresholds", config.entries_thresholds);
                 }
-                status_entries = get_status(num_entries, entries_thresholds);
+                mp_state_enum status_entries = get_status(num_entries, config.entries_thresholds);
                 if (status_entries == STATE_CRITICAL) {
                         status = STATE_CRITICAL;
                 } else if (status != STATE_CRITICAL) {
@@ -245,273 +214,272 @@ main (int argc, char *argv[])
         }
 
         /* print out the result */
-        if (crit_entries!=NULL || warn_entries!=NULL) {
-                printf (_("LDAP %s - found %d entries in %.3f seconds|%s %s\n"),
-                        state_text (status),
-                        num_entries,
-                        elapsed_time,
-                        fperfdata ("time", elapsed_time, "s",
-                                (int)warn_time, warn_time,
-                                (int)crit_time, crit_time,
-                                true, 0, false, 0),
-                        sperfdata ("entries", (double)num_entries, "",
-                                warn_entries,
-                                crit_entries,
-                                true, 0.0, false, 0.0));
+        if (config.crit_entries != NULL || config.warn_entries != NULL) {
+                printf(_("LDAP %s - found %d entries in %.3f seconds|%s %s\n"), state_text(status), num_entries, elapsed_time,
+                           fperfdata("time", elapsed_time, "s", config.warn_time_set, config.warn_time, config.crit_time_set, config.crit_time, true, 0,
+                                                 false, 0),
+                           sperfdata("entries", (double)num_entries, "", config.warn_entries, config.crit_entries, true, 0.0, false, 0.0));
         } else {
-                printf (_("LDAP %s - %.3f seconds response time|%s\n"),
-                        state_text (status),
-                        elapsed_time,
-                        fperfdata ("time", elapsed_time, "s",
-                                (int)warn_time, warn_time,
-                                (int)crit_time, crit_time,
-                                true, 0, false, 0));
+                printf(_("LDAP %s - %.3f seconds response time|%s\n"), state_text(status), elapsed_time,
+                           fperfdata("time", elapsed_time, "s", config.warn_time_set, config.warn_time, config.crit_time_set, config.crit_time, true, 0,
+                                                 false, 0));
         }
 
-        return status;
+        exit(status);
 }
 
 /* process command-line arguments */
-int
-process_arguments (int argc, char **argv)
-{
-        int c;
-
-        int option = 0;
+check_ldap_config_wrapper process_arguments(int argc, char **argv) {
         /* initialize the long option struct */
-        static struct option longopts[] = {
-                {"help", no_argument, 0, 'h'},
-                {"version", no_argument, 0, 'V'},
-                {"timeout", required_argument, 0, 't'},
-                {"hostname", required_argument, 0, 'H'},
-                {"base", required_argument, 0, 'b'},
-                {"attr", required_argument, 0, 'a'},
-                {"bind", required_argument, 0, 'D'},
-                {"pass", required_argument, 0, 'P'},
+        static struct option longopts[] = {{"help", no_argument, 0, 'h'},
+                                                                           {"version", no_argument, 0, 'V'},
+                                                                           {"timeout", required_argument, 0, 't'},
+                                                                           {"hostname", required_argument, 0, 'H'},
+                                                                           {"base", required_argument, 0, 'b'},
+                                                                           {"attr", required_argument, 0, 'a'},
+                                                                           {"bind", required_argument, 0, 'D'},
+                                                                           {"pass", required_argument, 0, 'P'},
 #ifdef HAVE_LDAP_SET_OPTION
-                {"ver2", no_argument, 0, '2'},
-                {"ver3", no_argument, 0, '3'},
+                                                                           {"ver2", no_argument, 0, '2'},
+                                                                           {"ver3", no_argument, 0, '3'},
 #endif
-                {"starttls", no_argument, 0, 'T'},
-                {"ssl", no_argument, 0, 'S'},
-                {"use-ipv4", no_argument, 0, '4'},
-                {"use-ipv6", no_argument, 0, '6'},
-                {"port", required_argument, 0, 'p'},
-                {"warn", required_argument, 0, 'w'},
-                {"crit", required_argument, 0, 'c'},
-                {"warn-entries", required_argument, 0, 'W'},
-                {"crit-entries", required_argument, 0, 'C'},
-                {"verbose", no_argument, 0, 'v'},
-                {0, 0, 0, 0}
+                                                                           {"starttls", no_argument, 0, 'T'},
+                                                                           {"ssl", no_argument, 0, 'S'},
+                                                                           {"use-ipv4", no_argument, 0, '4'},
+                                                                           {"use-ipv6", no_argument, 0, '6'},
+                                                                           {"port", required_argument, 0, 'p'},
+                                                                           {"warn", required_argument, 0, 'w'},
+                                                                           {"crit", required_argument, 0, 'c'},
+                                                                           {"warn-entries", required_argument, 0, 'W'},
+                                                                           {"crit-entries", required_argument, 0, 'C'},
+                                                                           {"verbose", no_argument, 0, 'v'},
+                                                                           {0, 0, 0, 0}};
+
+        check_ldap_config_wrapper result = {
+                .errorcode = OK,
+                .config = check_ldap_config_init(),
         };
 
-        if (argc < 2)
-                return ERROR;
+        if (argc < 2) {
+                result.errorcode = ERROR;
+                return result;
+        }
 
-        for (c = 1; c < argc; c++) {
-                if (strcmp ("-to", argv[c]) == 0)
-                        strcpy (argv[c], "-t");
+        for (int index = 1; index < argc; index++) {
+                if (strcmp("-to", argv[index]) == 0) {
+                        strcpy(argv[index], "-t");
+                }
         }
 
+        int option = 0;
         while (true) {
-                c = getopt_long (argc, argv, "hvV234TS6t:c:w:H:b:p:a:D:P:C:W:", longopts, &option);
+                int option_index = getopt_long(argc, argv, "hvV234TS6t:c:w:H:b:p:a:D:P:C:W:", longopts, &option);
 
-                if (c == -1 || c == EOF)
+                if (option_index == -1 || option_index == EOF) {
                         break;
+                }
 
-                switch (c) {
-                case 'h':                                                                       /* help */
-                        print_help ();
-                        exit (STATE_UNKNOWN);
-                case 'V':                                                                       /* version */
-                        print_revision (progname, NP_VERSION);
-                        exit (STATE_UNKNOWN);
-                case 't':                                                                       /* timeout period */
-                        if (!is_intnonneg (optarg))
-                                usage2 (_("Timeout interval must be a positive integer"), optarg);
-                        else
-                                socket_timeout = atoi (optarg);
+                switch (option_index) {
+                case 'h': /* help */
+                        print_help();
+                        exit(STATE_UNKNOWN);
+                case 'V': /* version */
+                        print_revision(progname, NP_VERSION);
+                        exit(STATE_UNKNOWN);
+                case 't': /* timeout period */
+                        if (!is_intnonneg(optarg)) {
+                                usage2(_("Timeout interval must be a positive integer"), optarg);
+                        } else {
+                                socket_timeout = atoi(optarg);
+                        }
                         break;
                 case 'H':
-                        ld_host = optarg;
+                        result.config.ld_host = optarg;
                         break;
                 case 'b':
-                        ld_base = optarg;
+                        result.config.ld_base = optarg;
                         break;
                 case 'p':
-                        ld_port = atoi (optarg);
+                        result.config.ld_port = atoi(optarg);
                         break;
                 case 'a':
-                        ld_attr = optarg;
+                        result.config.ld_attr = optarg;
                         break;
                 case 'D':
-                        ld_binddn = optarg;
+                        result.config.ld_binddn = optarg;
                         break;
                 case 'P':
-                        ld_passwd = optarg;
+                        result.config.ld_passwd = optarg;
                         break;
                 case 'w':
-                        warn_time = strtod (optarg, NULL);
+                        result.config.warn_time_set = true;
+                        result.config.warn_time = strtod(optarg, NULL);
                         break;
                 case 'c':
-                        crit_time = strtod (optarg, NULL);
+                        result.config.crit_time_set = true;
+                        result.config.crit_time = strtod(optarg, NULL);
                         break;
                 case 'W':
-                        warn_entries = optarg;
+                        result.config.warn_entries = optarg;
                         break;
                 case 'C':
-                        crit_entries = optarg;
+                        result.config.crit_entries = optarg;
                         break;
 #ifdef HAVE_LDAP_SET_OPTION
                 case '2':
-                        ld_protocol = 2;
+                        result.config.ld_protocol = 2;
                         break;
                 case '3':
-                        ld_protocol = 3;
+                        result.config.ld_protocol = 3;
                         break;
-#endif
+#endif // HAVE_LDAP_SET_OPTION
                 case '4':
                         address_family = AF_INET;
                         break;
                 case 'v':
-                        verbose = true;
+                        verbose++;
                         break;
                 case 'T':
-                        if (! ssl_on_connect)
-                                starttls = true;
-                        else
+                        if (!result.config.ssl_on_connect) {
+                                result.config.starttls = true;
+                        } else {
                                 usage_va(_("%s cannot be combined with %s"), "-T/--starttls", "-S/--ssl");
+                        }
                         break;
                 case 'S':
-                        if (! starttls) {
-                                ssl_on_connect = true;
-                                if (ld_port == -1)
-                                        ld_port = LDAPS_PORT;
-                        } else
+                        if (!result.config.starttls) {
+                                result.config.ssl_on_connect = true;
+                                if (result.config.ld_port == -1) {
+                                        result.config.ld_port = LDAPS_PORT;
+                                }
+                        } else {
                                 usage_va(_("%s cannot be combined with %s"), "-S/--ssl", "-T/--starttls");
+                        }
                         break;
                 case '6':
 #ifdef USE_IPV6
                         address_family = AF_INET6;
 #else
-                        usage (_("IPv6 support not available\n"));
+                        usage(_("IPv6 support not available\n"));
 #endif
                         break;
                 default:
-                        usage5 ();
+                        usage5();
                 }
         }
 
-        c = optind;
-        if (ld_host == NULL && is_host(argv[c]))
-                ld_host = strdup (argv[c++]);
+        int index = optind;
+        if ((result.config.ld_host == NULL) && is_host(argv[index])) {
+                result.config.ld_host = strdup(argv[index++]);
+        }
 
-        if (ld_base == NULL && argv[c])
-                ld_base = strdup (argv[c++]);
+        if ((result.config.ld_base == NULL) && argv[index]) {
+                result.config.ld_base = strdup(argv[index++]);
+        }
 
-        if (ld_port == -1)
-                ld_port = DEFAULT_PORT;
+        if (result.config.ld_port == -1) {
+                result.config.ld_port = DEFAULT_PORT;
+        }
 
-        return validate_arguments ();
+        if (strstr(argv[0], "check_ldaps") && !result.config.starttls && !result.config.ssl_on_connect) {
+                result.config.starttls = true;
+        }
+
+        return validate_arguments(result);
 }
 
+check_ldap_config_wrapper validate_arguments(check_ldap_config_wrapper config_wrapper) {
+        if (config_wrapper.config.ld_host == NULL || strlen(config_wrapper.config.ld_host) == 0) {
+                usage4(_("Please specify the host name\n"));
+        }
 
-int
-validate_arguments ()
-{
-        if (ld_host==NULL || strlen(ld_host)==0)
-                usage4 (_("Please specify the host name\n"));
+        if (config_wrapper.config.ld_base == NULL) {
+                usage4(_("Please specify the LDAP base\n"));
+        }
 
-        if (ld_base==NULL)
-                usage4 (_("Please specify the LDAP base\n"));
+        if (config_wrapper.config.crit_entries != NULL || config_wrapper.config.warn_entries != NULL) {
+                set_thresholds(&config_wrapper.config.entries_thresholds, config_wrapper.config.warn_entries, config_wrapper.config.crit_entries);
+        }
 
-        if (crit_entries!=NULL || warn_entries!=NULL) {
-                set_thresholds(&entries_thresholds,
-                        warn_entries, crit_entries);
+        if (config_wrapper.config.ld_passwd == NULL) {
+                config_wrapper.config.ld_passwd = getenv("LDAP_PASSWORD");
         }
-        if (ld_passwd==NULL)
-                ld_passwd = getenv("LDAP_PASSWORD");
 
-        return OK;
+        return config_wrapper;
 }
 
-
-void
-print_help (void)
-{
+void print_help(void) {
         char *myport;
-        xasprintf (&myport, "%d", DEFAULT_PORT);
+        xasprintf(&myport, "%d", DEFAULT_PORT);
 
-        print_revision (progname, NP_VERSION);
+        print_revision(progname, NP_VERSION);
 
-        printf ("Copyright (c) 1999 Didi Rieder (adrieder@sbox.tu-graz.ac.at)\n");
-        printf (COPYRIGHT, copyright, email);
+        printf("Copyright (c) 1999 Didi Rieder (adrieder@sbox.tu-graz.ac.at)\n");
+        printf(COPYRIGHT, copyright, email);
 
-        printf ("\n\n");
+        printf("\n\n");
 
-        print_usage ();
+        print_usage();
 
-        printf (UT_HELP_VRSN);
-        printf (UT_EXTRA_OPTS);
+        printf(UT_HELP_VRSN);
+        printf(UT_EXTRA_OPTS);
 
-        printf (UT_HOST_PORT, 'p', myport);
+        printf(UT_HOST_PORT, 'p', myport);
 
-        printf (UT_IPv46);
+        printf(UT_IPv46);
 
-        printf (" %s\n", "-a [--attr]");
-  printf ("    %s\n", _("ldap attribute to search (default: \"(objectclass=*)\""));
-  printf (" %s\n", "-b [--base]");
-  printf ("    %s\n", _("ldap base (eg. ou=my unit, o=my org, c=at"));
-  printf (" %s\n", "-D [--bind]");
-  printf ("    %s\n", _("ldap bind DN (if required)"));
-  printf (" %s\n", "-P [--pass]");
-  printf ("    %s\n", _("ldap password (if required, or set the password through environment variable 'LDAP_PASSWORD')"));
-  printf (" %s\n", "-T [--starttls]");
-  printf ("    %s\n", _("use starttls mechanism introduced in protocol version 3"));
-  printf (" %s\n", "-S [--ssl]");
-  printf ("    %s %i\n", _("use ldaps (ldap v2 ssl method). this also sets the default port to"), LDAPS_PORT);
+        printf(" %s\n", "-a [--attr]");
+        printf("    %s\n", _("ldap attribute to search (default: \"(objectclass=*)\""));
+        printf(" %s\n", "-b [--base]");
+        printf("    %s\n", _("ldap base (eg. ou=my unit, o=my org, c=at"));
+        printf(" %s\n", "-D [--bind]");
+        printf("    %s\n", _("ldap bind DN (if required)"));
+        printf(" %s\n", "-P [--pass]");
+        printf("    %s\n", _("ldap password (if required, or set the password through environment variable 'LDAP_PASSWORD')"));
+        printf(" %s\n", "-T [--starttls]");
+        printf("    %s\n", _("use starttls mechanism introduced in protocol version 3"));
+        printf(" %s\n", "-S [--ssl]");
+        printf("    %s %i\n", _("use ldaps (ldap v2 ssl method). this also sets the default port to"), LDAPS_PORT);
 
 #ifdef HAVE_LDAP_SET_OPTION
-        printf (" %s\n", "-2 [--ver2]");
-  printf ("    %s\n", _("use ldap protocol version 2"));
-  printf (" %s\n", "-3 [--ver3]");
-  printf ("    %s\n", _("use ldap protocol version 3"));
-  printf ("    (%s %d)\n", _("default protocol version:"), DEFAULT_PROTOCOL);
+        printf(" %s\n", "-2 [--ver2]");
+        printf("    %s\n", _("use ldap protocol version 2"));
+        printf(" %s\n", "-3 [--ver3]");
+        printf("    %s\n", _("use ldap protocol version 3"));
+        printf("    (%s %d)\n", _("default protocol version:"), DEFAULT_PROTOCOL);
 #endif
 
-        printf (UT_WARN_CRIT);
+        printf(UT_WARN_CRIT);
 
-  printf (" %s\n", "-W [--warn-entries]");
-  printf ("    %s\n", _("Number of found entries to result in warning status"));
-  printf (" %s\n", "-C [--crit-entries]");
-  printf ("    %s\n", _("Number of found entries to result in critical status"));
+        printf(" %s\n", "-W [--warn-entries]");
+        printf("    %s\n", _("Number of found entries to result in warning status"));
+        printf(" %s\n", "-C [--crit-entries]");
+        printf("    %s\n", _("Number of found entries to result in critical status"));
 
-        printf (UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
+        printf(UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
 
-        printf (UT_VERBOSE);
+        printf(UT_VERBOSE);
 
-        printf ("\n");
-        printf ("%s\n", _("Notes:"));
-        printf (" %s\n", _("If this plugin is called via 'check_ldaps', method 'STARTTLS' will be"));
-        printf (_(" implied (using default port %i) unless --port=636 is specified. In that case\n"), DEFAULT_PORT);
-        printf (" %s\n", _("'SSL on connect' will be used no matter how the plugin was called."));
-        printf (" %s\n", _("This detection is deprecated, please use 'check_ldap' with the '--starttls' or '--ssl' flags"));
-        printf (" %s\n", _("to define the behaviour explicitly instead."));
-        printf (" %s\n", _("The parameters --warn-entries and --crit-entries are optional."));
+        printf("\n");
+        printf("%s\n", _("Notes:"));
+        printf(" %s\n", _("If this plugin is called via 'check_ldaps', method 'STARTTLS' will be"));
+        printf(_(" implied (using default port %i) unless --port=636 is specified. In that case\n"), DEFAULT_PORT);
+        printf(" %s\n", _("'SSL on connect' will be used no matter how the plugin was called."));
+        printf(" %s\n", _("This detection is deprecated, please use 'check_ldap' with the '--starttls' or '--ssl' flags"));
+        printf(" %s\n", _("to define the behaviour explicitly instead."));
+        printf(" %s\n", _("The parameters --warn-entries and --crit-entries are optional."));
 
-        printf (UT_SUPPORT);
+        printf(UT_SUPPORT);
 }
 
-void
-print_usage (void)
-{
-  printf ("%s\n", _("Usage:"));
-        printf (" %s -H <host> -b <base_dn> [-p <port>] [-a <attr>] [-D <binddn>]",progname);
-  printf ("\n       [-P <password>] [-w <warn_time>] [-c <crit_time>] [-t timeout]%s\n",
+void print_usage(void) {
+        printf("%s\n", _("Usage:"));
+        printf(" %s -H <host> -b <base_dn> [-p <port>] [-a <attr>] [-D <binddn>]", progname);
+        printf("\n       [-P <password>] [-w <warn_time>] [-c <crit_time>] [-t timeout]%s\n",
 #ifdef HAVE_LDAP_SET_OPTION
-                        "\n       [-2|-3] [-4|-6]"
+                   "\n       [-2|-3] [-4|-6]"
 #else
-                        ""
+                   ""
 #endif
-                        );
+        );
 }
diff --git a/plugins/check_ldap.d/config.h b/plugins/check_ldap.d/config.h
new file mode 100644
index 00000000..c8a40610
--- /dev/null
+++ b/plugins/check_ldap.d/config.h
@@ -0,0 +1,60 @@
+#pragma once
+
+#include "../../config.h"
+#include "thresholds.h"
+#include <stddef.h>
+
+static char ld_defattr[] = "(objectclass=*)";
+
+enum {
+#ifdef HAVE_LDAP_SET_OPTION
+        DEFAULT_PROTOCOL = 2,
+#endif
+};
+
+typedef struct {
+        char *ld_host;
+        char *ld_base;
+        char *ld_passwd;
+        char *ld_binddn;
+        char *ld_attr;
+        int ld_port;
+        bool starttls;
+        bool ssl_on_connect;
+#ifdef HAVE_LDAP_SET_OPTION
+        int ld_protocol;
+#endif
+
+        char *warn_entries;
+        char *crit_entries;
+        thresholds *entries_thresholds;
+        bool warn_time_set;
+        double warn_time;
+        bool crit_time_set;
+        double crit_time;
+} check_ldap_config;
+
+check_ldap_config check_ldap_config_init() {
+        check_ldap_config tmp = {
+                .ld_host = NULL,
+                .ld_base = NULL,
+                .ld_passwd = NULL,
+                .ld_binddn = NULL,
+                .ld_attr = ld_defattr,
+                .ld_port = -1,
+                .starttls = false,
+                .ssl_on_connect = false,
+#ifdef HAVE_LDAP_SET_OPTION
+                .ld_protocol = DEFAULT_PROTOCOL,
+#endif
+
+                .warn_entries = NULL,
+                .crit_entries = NULL,
+                .entries_thresholds = NULL,
+                .warn_time_set = false,
+                .warn_time = 0,
+                .crit_time_set = false,
+                .crit_time = 0,
+        };
+        return tmp;
+}
diff --git a/plugins/check_mrtg.c b/plugins/check_mrtg.c
index 632e66fb..5bd276dc 100644
--- a/plugins/check_mrtg.c
+++ b/plugins/check_mrtg.c
@@ -35,21 +35,18 @@ const char *email = "devel@monitoring-plugins.org";
 
 #include "common.h"
 #include "utils.h"
+#include "check_mrtg.d/config.h"
+
+typedef struct {
+        int errorcode;
+        check_mrtg_config config;
+} check_mrtg_config_wrapper;
+static check_mrtg_config_wrapper process_arguments(int /*argc*/, char ** /*argv*/);
+static check_mrtg_config_wrapper validate_arguments(check_mrtg_config_wrapper /*config_wrapper*/);
 
-static int process_arguments(int /*argc*/, char ** /*argv*/);
-static int validate_arguments(void);
 static void print_help(void);
 void print_usage(void);
 
-static char *log_file = NULL;
-static int expire_minutes = 0;
-static bool use_average = true;
-static int variable_number = -1;
-static unsigned long value_warning_threshold = 0L;
-static unsigned long value_critical_threshold = 0L;
-static char *label;
-static char *units;
-
 int main(int argc, char **argv) {
         setlocale(LC_ALL, "");
         bindtextdomain(PACKAGE, LOCALEDIR);
@@ -58,32 +55,37 @@ int main(int argc, char **argv) {
         /* Parse extra opts if any */
         argv = np_extra_opts(&argc, argv, progname);
 
-        if (process_arguments(argc, argv) == ERROR)
+        check_mrtg_config_wrapper tmp_config = process_arguments(argc, argv);
+        if (tmp_config.errorcode == ERROR) {
                 usage4(_("Could not parse arguments\n"));
+        }
+
+        const check_mrtg_config config = tmp_config.config;
 
         /* open the MRTG log file for reading */
-        FILE *mtrg_log_file = fopen(log_file, "r");
+        FILE *mtrg_log_file = fopen(config.log_file, "r");
         if (mtrg_log_file == NULL) {
                 printf(_("Unable to open MRTG log file\n"));
                 return STATE_UNKNOWN;
         }
 
-        time_t timestamp = 0L;
-        unsigned long average_value_rate = 0L;
-        unsigned long maximum_value_rate = 0L;
+        time_t timestamp = 0;
+        unsigned long average_value_rate = 0;
+        unsigned long maximum_value_rate = 0;
         char input_buffer[MAX_INPUT_BUFFER];
         int line = 0;
         while (fgets(input_buffer, MAX_INPUT_BUFFER - 1, mtrg_log_file)) {
-
                 line++;
 
                 /* skip the first line of the log file */
-                if (line == 1)
+                if (line == 1) {
                         continue;
+                }
 
                 /* break out of read loop if we've passed the number of entries we want to read */
-                if (line > 2)
+                if (line > 2) {
                         break;
+                }
 
                 /* grab the timestamp */
                 char *temp_buffer = strtok(input_buffer, " ");
@@ -91,23 +93,27 @@ int main(int argc, char **argv) {
 
                 /* grab the average value 1 rate */
                 temp_buffer = strtok(NULL, " ");
-                if (variable_number == 1)
+                if (config.variable_number == 1) {
                         average_value_rate = strtoul(temp_buffer, NULL, 10);
+                }
 
                 /* grab the average value 2 rate */
                 temp_buffer = strtok(NULL, " ");
-                if (variable_number == 2)
+                if (config.variable_number == 2) {
                         average_value_rate = strtoul(temp_buffer, NULL, 10);
+                }
 
                 /* grab the maximum value 1 rate */
                 temp_buffer = strtok(NULL, " ");
-                if (variable_number == 1)
+                if (config.variable_number == 1) {
                         maximum_value_rate = strtoul(temp_buffer, NULL, 10);
+                }
 
                 /* grab the maximum value 2 rate */
                 temp_buffer = strtok(NULL, " ");
-                if (variable_number == 2)
+                if (config.variable_number == 2) {
                         maximum_value_rate = strtoul(temp_buffer, NULL, 10);
+                }
         }
 
         /* close the log file */
@@ -122,49 +128,59 @@ int main(int argc, char **argv) {
         /* make sure the MRTG data isn't too old */
         time_t current_time;
         time(&current_time);
-        if (expire_minutes > 0 && (current_time - timestamp) > (expire_minutes * 60)) {
+        if (config.expire_minutes > 0 && (current_time - timestamp) > (config.expire_minutes * 60)) {
                 printf(_("MRTG data has expired (%d minutes old)\n"), (int)((current_time - timestamp) / 60));
                 return STATE_WARNING;
         }
 
         unsigned long rate = 0L;
         /* else check the incoming/outgoing rates */
-        if (use_average)
+        if (config.use_average) {
                 rate = average_value_rate;
-        else
+        } else {
                 rate = maximum_value_rate;
+        }
 
         int result = STATE_OK;
-        if (rate > value_critical_threshold)
+        if (config.value_critical_threshold_set && rate > config.value_critical_threshold) {
                 result = STATE_CRITICAL;
-        else if (rate > value_warning_threshold)
+        } else if (config.value_warning_threshold_set && rate > config.value_warning_threshold) {
                 result = STATE_WARNING;
+        }
 
-        printf("%s. %s = %lu %s|%s\n", (use_average) ? _("Avg") : _("Max"), label, rate, units,
-                   perfdata(label, (long)rate, units, (int)value_warning_threshold, (long)value_warning_threshold, (int)value_critical_threshold,
-                                        (long)value_critical_threshold, 0, 0, 0, 0));
+        printf("%s. %s = %lu %s|%s\n", (config.use_average) ? _("Avg") : _("Max"), config.label, rate, config.units,
+                   perfdata(config.label, (long)rate, config.units, config.value_warning_threshold_set, (long)config.value_warning_threshold,
+                                        config.value_critical_threshold_set, (long)config.value_critical_threshold, 0, 0, 0, 0));
 
         return result;
 }
 
 /* process command-line arguments */
-int process_arguments(int argc, char **argv) {
+check_mrtg_config_wrapper process_arguments(int argc, char **argv) {
         static struct option longopts[] = {
                 {"logfile", required_argument, 0, 'F'},  {"expires", required_argument, 0, 'e'},  {"aggregation", required_argument, 0, 'a'},
                 {"variable", required_argument, 0, 'v'}, {"critical", required_argument, 0, 'c'}, {"warning", required_argument, 0, 'w'},
                 {"label", required_argument, 0, 'l'},    {"units", required_argument, 0, 'u'},    {"variable", required_argument, 0, 'v'},
                 {"version", no_argument, 0, 'V'},        {"help", no_argument, 0, 'h'},           {0, 0, 0, 0}};
 
-        if (argc < 2)
-                return ERROR;
+        check_mrtg_config_wrapper result = {
+                .errorcode = OK,
+                .config = check_mrtg_config_init(),
+        };
+
+        if (argc < 2) {
+                result.errorcode = ERROR;
+                return result;
+        }
 
         for (int i = 1; i < argc; i++) {
-                if (strcmp("-to", argv[i]) == 0)
+                if (strcmp("-to", argv[i]) == 0) {
                         strcpy(argv[i], "-t");
-                else if (strcmp("-wt", argv[i]) == 0)
+                } else if (strcmp("-wt", argv[i]) == 0) {
                         strcpy(argv[i], "-w");
-                else if (strcmp("-ct", argv[i]) == 0)
+                } else if (strcmp("-ct", argv[i]) == 0) {
                         strcpy(argv[i], "-c");
+                }
         }
 
         int option_char;
@@ -172,38 +188,39 @@ int process_arguments(int argc, char **argv) {
         while (1) {
                 option_char = getopt_long(argc, argv, "hVF:e:a:v:c:w:l:u:", longopts, &option);
 
-                if (option_char == -1 || option_char == EOF)
+                if (option_char == -1 || option_char == EOF) {
                         break;
+                }
 
                 switch (option_char) {
                 case 'F': /* input file */
-                        log_file = optarg;
+                        result.config.log_file = optarg;
                         break;
                 case 'e': /* ups name */
-                        expire_minutes = atoi(optarg);
+                        result.config.expire_minutes = atoi(optarg);
                         break;
                 case 'a': /* port */
-                        if (!strcmp(optarg, "MAX"))
-                                use_average = false;
-                        else
-                                use_average = true;
+                        result.config.use_average = (bool)(strcmp(optarg, "MAX"));
                         break;
                 case 'v':
-                        variable_number = atoi(optarg);
-                        if (variable_number < 1 || variable_number > 2)
+                        result.config.variable_number = atoi(optarg);
+                        if (result.config.variable_number < 1 || result.config.variable_number > 2) {
                                 usage4(_("Invalid variable number"));
+                        }
                         break;
                 case 'w': /* critical time threshold */
-                        value_warning_threshold = strtoul(optarg, NULL, 10);
+                        result.config.value_warning_threshold_set = true;
+                        result.config.value_warning_threshold = strtoul(optarg, NULL, 10);
                         break;
                 case 'c': /* warning time threshold */
-                        value_critical_threshold = strtoul(optarg, NULL, 10);
+                        result.config.value_critical_threshold_set = true;
+                        result.config.value_critical_threshold = strtoul(optarg, NULL, 10);
                         break;
                 case 'l': /* label */
-                        label = optarg;
+                        result.config.label = optarg;
                         break;
                 case 'u': /* timeout */
-                        units = optarg;
+                        result.config.units = optarg;
                         break;
                 case 'V': /* version */
                         print_revision(progname, NP_VERSION);
@@ -217,63 +234,69 @@ int process_arguments(int argc, char **argv) {
         }
 
         option_char = optind;
-        if (log_file == NULL && argc > option_char) {
-                log_file = argv[option_char++];
+        if (result.config.log_file == NULL && argc > option_char) {
+                result.config.log_file = argv[option_char++];
         }
 
-        if (expire_minutes <= 0 && argc > option_char) {
-                if (is_intpos(argv[option_char]))
-                        expire_minutes = atoi(argv[option_char++]);
-                else
+        if (result.config.expire_minutes <= 0 && argc > option_char) {
+                if (is_intpos(argv[option_char])) {
+                        result.config.expire_minutes = atoi(argv[option_char++]);
+                } else {
                         die(STATE_UNKNOWN, _("%s is not a valid expiration time\nUse '%s -h' for additional help\n"), argv[option_char], progname);
+                }
         }
 
         if (argc > option_char && strcmp(argv[option_char], "MAX") == 0) {
-                use_average = false;
+                result.config.use_average = false;
                 option_char++;
         } else if (argc > option_char && strcmp(argv[option_char], "AVG") == 0) {
-                use_average = true;
+                result.config.use_average = true;
                 option_char++;
         }
 
-        if (argc > option_char && variable_number == -1) {
-                variable_number = atoi(argv[option_char++]);
-                if (variable_number < 1 || variable_number > 2) {
+        if (argc > option_char && result.config.variable_number == -1) {
+                result.config.variable_number = atoi(argv[option_char++]);
+                if (result.config.variable_number < 1 || result.config.variable_number > 2) {
                         printf("%s :", argv[option_char]);
                         usage(_("Invalid variable number\n"));
                 }
         }
 
-        if (argc > option_char && value_warning_threshold == 0) {
-                value_warning_threshold = strtoul(argv[option_char++], NULL, 10);
+        if (argc > option_char && !result.config.value_warning_threshold_set) {
+                result.config.value_warning_threshold_set = true;
+                result.config.value_warning_threshold = strtoul(argv[option_char++], NULL, 10);
         }
 
-        if (argc > option_char && value_critical_threshold == 0) {
-                value_critical_threshold = strtoul(argv[option_char++], NULL, 10);
+        if (argc > option_char && !result.config.value_critical_threshold_set) {
+                result.config.value_critical_threshold_set = true;
+                result.config.value_critical_threshold = strtoul(argv[option_char++], NULL, 10);
         }
 
-        if (argc > option_char && strlen(label) == 0) {
-                label = argv[option_char++];
+        if (argc > option_char && strlen(result.config.label) == 0) {
+                result.config.label = argv[option_char++];
         }
 
-        if (argc > option_char && strlen(units) == 0) {
-                units = argv[option_char++];
+        if (argc > option_char && strlen(result.config.units) == 0) {
+                result.config.units = argv[option_char++];
         }
 
-        return validate_arguments();
+        return validate_arguments(result);
 }
 
-int validate_arguments(void) {
-        if (variable_number == -1)
+check_mrtg_config_wrapper validate_arguments(check_mrtg_config_wrapper config_wrapper) {
+        if (config_wrapper.config.variable_number == -1) {
                 usage4(_("You must supply the variable number"));
+        }
 
-        if (label == NULL)
-                label = strdup("value");
+        if (config_wrapper.config.label == NULL) {
+                config_wrapper.config.label = strdup("value");
+        }
 
-        if (units == NULL)
-                units = strdup("");
+        if (config_wrapper.config.units == NULL) {
+                config_wrapper.config.units = strdup("");
+        }
 
-        return OK;
+        return config_wrapper;
 }
 
 void print_help(void) {
diff --git a/plugins/check_mrtg.d/config.h b/plugins/check_mrtg.d/config.h
new file mode 100644
index 00000000..96b849a2
--- /dev/null
+++ b/plugins/check_mrtg.d/config.h
@@ -0,0 +1,36 @@
+#pragma once
+
+#include "../../config.h"
+#include <stddef.h>
+#include <stdlib.h>
+
+typedef struct {
+        bool use_average;
+        int variable_number;
+        int expire_minutes;
+        char *label;
+        char *units;
+        char *log_file;
+
+        bool value_warning_threshold_set;
+        unsigned long value_warning_threshold;
+        bool value_critical_threshold_set;
+        unsigned long value_critical_threshold;
+} check_mrtg_config;
+
+check_mrtg_config check_mrtg_config_init() {
+        check_mrtg_config tmp = {
+                .use_average = true,
+                .variable_number = -1,
+                .expire_minutes = 0,
+                .label = NULL,
+                .units = NULL,
+                .log_file = NULL,
+
+                .value_warning_threshold_set = false,
+                .value_warning_threshold = 0,
+                .value_critical_threshold_set = false,
+                .value_critical_threshold = 0,
+        };
+        return tmp;
+}