1 files changed, 296 insertions, 0 deletions

diff --git a/plugins/check_dig.c b/plugins/check_dig.c
new file mode 100644
index 0000000..57609ac
--- /dev/null
+++ b/plugins/check_dig.c
@@ -0,0 +1,296 @@
+/******************************************************************************
+*
+* check_dig.c
+*
+* Program: dig plugin for Nagios
+* License: GPL
+* Copyright (c) 2000
+*
+* $Id$
+*
+*****************************************************************************/
+
+#include "config.h"
+#include "common.h"
+#include "utils.h"
+#include "popen.h"
+
+#define PROGNAME "check_dig"
+
+int process_arguments (int, char **);
+int call_getopt (int, char **);
+int validate_arguments (void);
+int check_disk (int usp, int free_disk);
+void print_help (void);
+void print_usage (void);
+
+char *query_address = NULL;
+char *dns_server = NULL;
+int verbose = FALSE;
+
+int
+main (int argc, char **argv)
+{
+        char input_buffer[MAX_INPUT_BUFFER];
+        char *command_line = NULL;
+        char *output = NULL;
+        int result = STATE_UNKNOWN;
+
+        /* Set signal handling and alarm */
+        if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR)
+                usage ("Cannot catch SIGALRM\n");
+
+        if (process_arguments (argc, argv) != OK)
+                usage ("Could not parse arguments\n");
+
+        /* get the command to run */
+        command_line =
+                ssprintf (command_line, "%s @%s %s", PATH_TO_DIG, dns_server,
+                                                        query_address);
+
+        alarm (timeout_interval);
+        time (&start_time);
+
+        if (verbose)
+                printf ("%s\n", command_line);
+        /* run the command */
+        child_process = spopen (command_line);
+        if (child_process == NULL) {
+                printf ("Could not open pipe: %s\n", command_line);
+                return STATE_UNKNOWN;
+        }
+
+        child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
+        if (child_stderr == NULL)
+                printf ("Could not open stderr for %s\n", command_line);
+
+        output = strscpy (output, "");
+
+        while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
+
+                /* the server is responding, we just got the host name... */
+                if (strstr (input_buffer, ";; ANSWER SECTION:")) {
+
+                        /* get the host address */
+                        if (!fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process))
+                                break;
+
+                        if (strpbrk (input_buffer, "\r\n"))
+                                input_buffer[strcspn (input_buffer, "\r\n")] = '\0';
+
+                        if (strstr (input_buffer, query_address) == input_buffer) {
+                                output = strscpy (output, input_buffer);
+                                result = STATE_OK;
+                        }
+                        else {
+                                strcpy (output, "Server not found in ANSWER SECTION");
+                                result = STATE_WARNING;
+                        }
+
+                        continue;
+                }
+
+        }
+
+        if (result != STATE_OK) {
+                strcpy (output, "No ANSWER SECTION found");
+        }
+
+        while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr)) {
+                /* If we get anything on STDERR, at least set warning */
+                result = max (result, STATE_WARNING);
+                printf ("%s", input_buffer);
+                if (!strcmp (output, ""))
+                        strcpy (output, 1 + index (input_buffer, ':'));
+        }
+
+        (void) fclose (child_stderr);
+
+        /* close the pipe */
+        if (spclose (child_process)) {
+                result = max (result, STATE_WARNING);
+                if (!strcmp (output, ""))
+                        strcpy (output, "nslookup returned error status");
+        }
+
+        (void) time (&end_time);
+
+        if (result == STATE_OK)
+                printf ("DNS ok - %d seconds response time (%s)\n",
+                                                (int) (end_time - start_time), output);
+        else if (result == STATE_WARNING)
+                printf ("DNS WARNING - %s\n",
+                                                !strcmp (output,
+                                                                                 "") ? " Probably a non-existent host/domain" : output);
+        else if (result == STATE_CRITICAL)
+                printf ("DNS CRITICAL - %s\n",
+                                                !strcmp (output,
+                                                                                 "") ? " Probably a non-existent host/domain" : output);
+        else
+                printf ("DNS problem - %s\n",
+                                                !strcmp (output,
+                                                                                 "") ? " Probably a non-existent host/domain" : output);
+
+        return result;
+}
+
+/* process command-line arguments */
+int
+process_arguments (int argc, char **argv)
+{
+        int c;
+
+        if (argc < 2)
+                return ERROR;
+
+
+        c = 0;
+        while ((c += (call_getopt (argc - c, &argv[c]))) < argc) {
+
+                if (is_option (argv[c]))
+                        continue;
+
+                if (dns_server == NULL) {
+                        if (is_host (argv[c])) {
+                                dns_server = argv[c];
+                        }
+                        else {
+                                usage ("Invalid host name");
+                        }
+                }
+        }
+
+        if (dns_server == NULL)
+                dns_server = strscpy (NULL, "127.0.0.1");
+
+        return validate_arguments ();
+}
+
+
+
+
+
+
+int
+call_getopt (int argc, char **argv)
+{
+        int c, i = 0;
+
+#ifdef HAVE_GETOPT_H
+        int option_index = 0;
+        static struct option long_options[] = {
+                {"hostname", required_argument, 0, 'H'},
+                {"query_address", required_argument, 0, 'e'},
+                {"verbose", no_argument, 0, 'v'},
+                {"version", no_argument, 0, 'V'},
+                {"help", no_argument, 0, 'h'},
+                {0, 0, 0, 0}
+        };
+#endif
+
+        while (1) {
+#ifdef HAVE_GETOPT_H
+                c = getopt_long (argc, argv, "+hVvt:l:H:", long_options, &option_index);
+#else
+                c = getopt (argc, argv, "+?hVvt:l:H:");
+#endif
+
+                i++;
+
+                if (c == -1 || c == EOF || c == 1)
+                        break;
+
+                switch (c) {
+                case 't':
+                case 'l':
+                case 'H':
+                        i++;
+                }
+
+                switch (c) {
+                case 'H':                                                                       /* hostname */
+                        if (is_host (optarg)) {
+                                dns_server = optarg;
+                        }
+                        else {
+                                usage ("Invalid host name\n");
+                        }
+                        break;
+                case 'l':                                                                       /* username */
+                        query_address = optarg;
+                        break;
+                case 'v':                                                                       /* verbose */
+                        verbose = TRUE;
+                        break;
+                case 't':                                                                       /* timeout */
+                        if (is_intnonneg (optarg)) {
+                                timeout_interval = atoi (optarg);
+                        }
+                        else {
+                                usage ("Time interval must be a nonnegative integer\n");
+                        }
+                        break;
+                case 'V':                                                                       /* version */
+                        print_revision (PROGNAME, "$Revision$");
+                        exit (STATE_OK);
+                case 'h':                                                                       /* help */
+                        print_help ();
+                        exit (STATE_OK);
+                case '?':                                                                       /* help */
+                        usage ("Invalid argument\n");
+                }
+        }
+        return i;
+}
+
+
+
+
+
+int
+validate_arguments (void)
+{
+        return OK;
+}
+
+
+
+
+
+void
+print_help (void)
+{
+        print_revision (PROGNAME, "$Revision$");
+        printf
+                ("Copyright (c) 2000 Karl DeBisschop\n\n"
+                 "This plugin use dig to test the DNS service on the specified host.\n\n");
+        print_usage ();
+        printf
+                ("\nOptions:\n"
+                 " -H, --hostname=STRING or IPADDRESS\n"
+                 "   Check server on the indicated host\n"
+                 " -l, --lookup=STRING\n"
+                 "   machine name to lookup\n"
+                 " -t, --timeout=INTEGER\n"
+                 "   Seconds before connection attempt times out (default: %d)\n"
+                 " -v, --verbose\n"
+                 "   Print extra information (command-line use only)\n"
+                 " -h, --help\n"
+                 "   Print detailed help screen\n"
+                 " -V, --version\n"
+                 "   Print version information\n\n", DEFAULT_SOCKET_TIMEOUT);
+        support ();
+}
+
+
+
+
+
+void
+print_usage (void)
+{
+        printf
+                ("Usage: %s -H host -l lookup [-t timeout] [-v]\n"
+                 "       %s --help\n"
+                 "       %s --version\n", PROGNAME, PROGNAME, PROGNAME);
+}