Initial revision

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@2 f882894a-f735-0410-b71e-b25c423dba1c

1 files changed, 296 insertions, 0 deletions

diff --git a/plugins/check_dig.c b/plugins/check_dig.c
new file mode 100644
index 00000000..57609acd
--- /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);
+}