![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/plugins/check_dig.c b/plugins/check_dig.c
index c60789651492dd353c37e1f1bc320f9ab9e3d00c..45189b000d222ce7c4ca0a7186103bafaabaddfa 100644 (file)
--- a/plugins/check_dig.c
+++ b/plugins/check_dig.c
/*****************************************************************************
-
- 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 2 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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id$
-
+*
+* Nagios check_dig plugin
+*
+* License: GPL
+* Copyright (c) 2002-2008 Nagios Plugins Development Team
+*
+* Description:
+*
+* This file contains the check_dig 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/>.
+*
+*
*****************************************************************************/
+/* Hackers note:
+ * There are typecasts to (char *) from _("foo bar") in this file.
+ * They prevent compiler warnings. Never (ever), permute strings obtained
+ * that are typecast from (const char *) (which happens when --disable-nls)
+ * because on some architectures those strings are in non-writable memory */
+
const char *progname = "check_dig";
-const char *revision = "$Revision$";
-const char *copyright = "2002-2004";
+const char *copyright = "2002-2008";
const char *email = "nagiosplug-devel@lists.sourceforge.net";
#include "common.h"
#include "netutils.h"
#include "utils.h"
-#include "popen.h"
+#include "runcmd.h"
int process_arguments (int, char **);
int validate_arguments (void);
void print_help (void);
void print_usage (void);
-enum {
- UNDEFINED = 0,
- DEFAULT_PORT = 53
-};
+#define UNDEFINED 0
+#define DEFAULT_PORT 53
char *query_address = NULL;
char *record_type = "A";
char *expected_address = NULL;
char *dns_server = NULL;
+char *dig_args = "";
int verbose = FALSE;
int server_port = DEFAULT_PORT;
double warning_interval = UNDEFINED;
int
main (int argc, char **argv)
{
- char input_buffer[MAX_INPUT_BUFFER];
- char *command_line;
- char *output;
- long microsec;
- double elapsed_time;
- int result = STATE_UNKNOWN;
-
- output = strdup ("");
-
- setlocale (LC_ALL, "");
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
-
- /* Set signal handling and alarm */
- if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR)
- usage4 (_("Cannot catch SIGALRM"));
-
- if (process_arguments (argc, argv) == ERROR)
- usage4 (_("Could not parse arguments"));
-
- /* get the command to run */
- asprintf (&command_line, "%s @%s -p %d %s -t %s",
- PATH_TO_DIG, dns_server, server_port, query_address, record_type);
-
- alarm (timeout_interval);
- gettimeofday (&tv, NULL);
-
- if (verbose) {
- printf ("%s\n", command_line);
- if(expected_address != NULL) {
- printf (_("Looking for: '%s'\n"), expected_address);
- } else {
- printf (_("Looking for: '%s'\n"), query_address);
- }
- }
-
- /* 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);
-
- 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:")) {
-
- /* loop through the whole 'ANSWER SECTION' */
- do {
- /* 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 (verbose && !strstr (input_buffer, ";; "))
- printf ("%s\n", input_buffer);
-
- if (expected_address==NULL && strstr (input_buffer, query_address) != NULL) {
- output = strdup(input_buffer);
- result = STATE_OK;
- }
- else if (expected_address != NULL && strstr (input_buffer, expected_address) != NULL) {
- output = strdup(input_buffer);
- result = STATE_OK;
- }
-
- } while (!strstr (input_buffer, ";; "));
-
- if (result == STATE_UNKNOWN) {
- asprintf (&output, _("Server not found in ANSWER SECTION"));
- result = STATE_WARNING;
- }
- }
-
- }
-
- if (result == STATE_UNKNOWN) {
- asprintf (&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_state (result, STATE_WARNING);
- printf ("%s", input_buffer);
- if (strlen (output) == 0)
- output = strdup (1 + index (input_buffer, ':'));
- }
-
- (void) fclose (child_stderr);
-
- /* close the pipe */
- if (spclose (child_process)) {
- result = max_state (result, STATE_WARNING);
- if (strlen (output) == 0)
- asprintf (&output, _("dig returned an error status"));
- }
-
- microsec = deltime (tv);
- elapsed_time = (double)microsec / 1.0e6;
-
- if (output == NULL || strlen (output) == 0)
- asprintf (&output, _(" Probably a non-existent host/domain"));
-
- if (critical_interval > UNDEFINED && elapsed_time > critical_interval)
- result = STATE_CRITICAL;
-
- else if (warning_interval > UNDEFINED && elapsed_time > warning_interval)
- result = STATE_WARNING;
-
- asprintf (&output, _("%.3f seconds response time (%s)"), elapsed_time, output);
-
- printf ("DNS %s - %s|%s\n",
- state_text (result), output,
- fperfdata("time", elapsed_time, "s",
- (warning_interval>UNDEFINED?TRUE:FALSE),
- warning_interval,
- (critical_interval>UNDEFINED?TRUE:FALSE),
- critical_interval,
- TRUE, 0, FALSE, 0));
- return result;
+ char *command_line;
+ output chld_out, chld_err;
+ char *msg = NULL;
+ size_t i;
+ char *t;
+ long microsec;
+ double elapsed_time;
+ int result = STATE_UNKNOWN;
+
+ setlocale (LC_ALL, "");
+ bindtextdomain (PACKAGE, LOCALEDIR);
+ textdomain (PACKAGE);
+
+ /* Set signal handling and alarm */
+ if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR)
+ usage_va(_("Cannot catch SIGALRM"));
+
+ /* Parse extra opts if any */
+ argv=np_extra_opts (&argc, argv, progname);
+
+ if (process_arguments (argc, argv) == ERROR)
+ usage_va(_("Could not parse arguments"));
+
+ /* get the command to run */
+ asprintf (&command_line, "%s @%s -p %d %s -t %s %s",
+ PATH_TO_DIG, dns_server, server_port, query_address, record_type, dig_args);
+
+ alarm (timeout_interval);
+ gettimeofday (&tv, NULL);
+
+ if (verbose) {
+ printf ("%s\n", command_line);
+ if(expected_address != NULL) {
+ printf (_("Looking for: '%s'\n"), expected_address);
+ } else {
+ printf (_("Looking for: '%s'\n"), query_address);
+ }
+ }
+
+ /* run the command */
+ if(np_runcmd(command_line, &chld_out, &chld_err, 0) != 0) {
+ result = STATE_WARNING;
+ msg = (char *)_("dig returned an error status");
+ }
+
+ for(i = 0; i < chld_out.lines; i++) {
+ /* the server is responding, we just got the host name... */
+ if (strstr (chld_out.line[i], ";; ANSWER SECTION:")) {
+
+ /* loop through the whole 'ANSWER SECTION' */
+ for(; i < chld_out.lines; i++) {
+ /* get the host address */
+ if (verbose)
+ printf ("%s\n", chld_out.line[i]);
+
+ if (strstr (chld_out.line[i], (expected_address == NULL ? query_address : expected_address)) != NULL) {
+ msg = chld_out.line[i];
+ result = STATE_OK;
+
+ /* Translate output TAB -> SPACE */
+ t = msg;
+ while ((t = strchr(t, '\t')) != NULL) *t = ' ';
+ break;
+ }
+ }
+
+ if (result == STATE_UNKNOWN) {
+ msg = (char *)_("Server not found in ANSWER SECTION");
+ result = STATE_WARNING;
+ }
+
+ /* we found the answer section, so break out of the loop */
+ break;
+ }
+ }
+
+ if (result == STATE_UNKNOWN) {
+ msg = (char *)_("No ANSWER SECTION found");
+ result = STATE_CRITICAL;
+ }
+
+ /* If we get anything on STDERR, at least set warning */
+ if(chld_err.buflen > 0) {
+ result = max_state(result, STATE_WARNING);
+ if(!msg) for(i = 0; i < chld_err.lines; i++) {
+ msg = strchr(chld_err.line[0], ':');
+ if(msg) {
+ msg++;
+ break;
+ }
+ }
+ }
+
+ microsec = deltime (tv);
+ elapsed_time = (double)microsec / 1.0e6;
+
+ if (critical_interval > UNDEFINED && elapsed_time > critical_interval)
+ result = STATE_CRITICAL;
+
+ else if (warning_interval > UNDEFINED && elapsed_time > warning_interval)
+ result = STATE_WARNING;
+
+ printf ("DNS %s - %.3f seconds response time (%s)|%s\n",
+ state_text (result), elapsed_time,
+ msg ? msg : _("Probably a non-existent host/domain"),
+ fperfdata("time", elapsed_time, "s",
+ (warning_interval>UNDEFINED?TRUE:FALSE),
+ warning_interval,
+ (critical_interval>UNDEFINED?TRUE:FALSE),
+ critical_interval,
+ TRUE, 0, FALSE, 0));
+ return result;
}
int
process_arguments (int argc, char **argv)
{
- int c;
-
- int option = 0;
- static struct option longopts[] = {
- {"hostname", required_argument, 0, 'H'},
- {"query_address", required_argument, 0, 'l'},
- {"warning", required_argument, 0, 'w'},
- {"critical", required_argument, 0, 'c'},
- {"timeout", required_argument, 0, 't'},
- {"verbose", no_argument, 0, 'v'},
- {"version", no_argument, 0, 'V'},
- {"help", no_argument, 0, 'h'},
- {"record_type", required_argument, 0, 'T'},
- {"expected_address", required_argument, 0, 'a'},
- {0, 0, 0, 0}
- };
-
- if (argc < 2)
- return ERROR;
-
- while (1) {
- c = getopt_long (argc, argv, "hVvt:l:H:w:c:T:a:", longopts, &option);
-
- if (c == -1 || c == EOF)
- break;
-
- switch (c) {
- case '?': /* help */
- usage2 (_("Unknown argument"), optarg);
- case 'h': /* help */
- print_help ();
- exit (STATE_OK);
- case 'V': /* version */
- print_revision (progname, revision);
- exit (STATE_OK);
- case 'H': /* hostname */
- if (is_host (optarg)) {
- dns_server = optarg;
- }
- else {
- usage2 (_("Invalid hostname/address"), optarg);
- }
- break;
- case 'p': /* server port */
- if (is_intpos (optarg)) {
- server_port = atoi (optarg);
- }
- else {
- usage2 (_("Port must be a positive integer"), optarg);
- }
- break;
- case 'l': /* address to lookup */
- query_address = optarg;
- break;
- case 'w': /* warning */
- if (is_nonnegative (optarg)) {
- warning_interval = strtod (optarg, NULL);
- }
- else {
- usage2 (_("Warning interval must be a positive integer"), optarg);
- }
- break;
- case 'c': /* critical */
- if (is_nonnegative (optarg)) {
- critical_interval = strtod (optarg, NULL);
- }
- else {
- usage2 (_("Critical interval must be a positive integer"), optarg);
- }
- break;
- case 't': /* timeout */
- if (is_intnonneg (optarg)) {
- timeout_interval = atoi (optarg);
- }
- else {
- usage2 (_("Timeout interval must be a positive integer"), optarg);
- }
- break;
- case 'v': /* verbose */
- verbose = TRUE;
- break;
- case 'T':
- record_type = optarg;
- break;
- case 'a':
- expected_address = optarg;
- break;
- }
- }
-
- c = optind;
- if (dns_server == NULL) {
- if (c < argc) {
- if (is_host (argv[c])) {
- dns_server = argv[c];
- }
- else {
- usage2 (_("Invalid hostname/address"), argv[c]);
- }
- }
- else {
- dns_server = strdup ("127.0.0.1");
- }
- }
-
- return validate_arguments ();
+ int c;
+
+ int option = 0;
+ static struct option longopts[] = {
+ {"hostname", required_argument, 0, 'H'},
+ {"query_address", required_argument, 0, 'l'},
+ {"warning", required_argument, 0, 'w'},
+ {"critical", required_argument, 0, 'c'},
+ {"timeout", required_argument, 0, 't'},
+ {"dig-arguments", required_argument, 0, 'A'},
+ {"verbose", no_argument, 0, 'v'},
+ {"version", no_argument, 0, 'V'},
+ {"help", no_argument, 0, 'h'},
+ {"record_type", required_argument, 0, 'T'},
+ {"expected_address", required_argument, 0, 'a'},
+ {"port", required_argument, 0, 'p'},
+ {0, 0, 0, 0}
+ };
+
+ if (argc < 2)
+ return ERROR;
+
+ while (1) {
+ c = getopt_long (argc, argv, "hVvt:l:H:w:c:T:p:a:A:", longopts, &option);
+
+ if (c == -1 || c == EOF)
+ break;
+
+ switch (c) {
+ case 'h': /* help */
+ print_help ();
+ exit (STATE_OK);
+ case 'V': /* version */
+ print_revision (progname, NP_VERSION);
+ exit (STATE_OK);
+ case 'H': /* hostname */
+ host_or_die(optarg);
+ dns_server = optarg;
+ break;
+ case 'p': /* server port */
+ if (is_intpos (optarg)) {
+ server_port = atoi (optarg);
+ }
+ else {
+ usage_va(_("Port must be a positive integer - %s"), optarg);
+ }
+ break;
+ case 'l': /* address to lookup */
+ query_address = optarg;
+ break;
+ case 'w': /* warning */
+ if (is_nonnegative (optarg)) {
+ warning_interval = strtod (optarg, NULL);
+ }
+ else {
+ usage_va(_("Warning interval must be a positive integer - %s"), optarg);
+ }
+ break;
+ case 'c': /* critical */
+ if (is_nonnegative (optarg)) {
+ critical_interval = strtod (optarg, NULL);
+ }
+ else {
+ usage_va(_("Critical interval must be a positive integer - %s"), optarg);
+ }
+ break;
+ case 't': /* timeout */
+ if (is_intnonneg (optarg)) {
+ timeout_interval = atoi (optarg);
+ }
+ else {
+ usage_va(_("Timeout interval must be a positive integer - %s"), optarg);
+ }
+ break;
+ case 'A': /* dig arguments */
+ dig_args = strdup(optarg);
+ break;
+ case 'v': /* verbose */
+ verbose = TRUE;
+ break;
+ case 'T':
+ record_type = optarg;
+ break;
+ case 'a':
+ expected_address = optarg;
+ break;
+ default: /* usage5 */
+ usage5();
+ }
+ }
+
+ c = optind;
+ if (dns_server == NULL) {
+ if (c < argc) {
+ host_or_die(argv[c]);
+ dns_server = argv[c];
+ }
+ else {
+ dns_server = strdup ("127.0.0.1");
+ }
+ }
+
+ return validate_arguments ();
}
int
validate_arguments (void)
{
- return OK;
+ if (query_address != NULL)
+ return OK;
+ else
+ return ERROR;
}
void
print_help (void)
{
- char *myport;
-
- asprintf (&myport, "%d", DEFAULT_PORT);
+ char *myport;
- print_revision (progname, revision);
+ asprintf (&myport, "%d", DEFAULT_PORT);
- printf ("Copyright (c) 2000 Karl DeBisschop <kdebisschop@users.sourceforge.net>\n");
- printf (COPYRIGHT, copyright, email);
+ print_revision (progname, NP_VERSION);
- printf (_("Test the DNS service on the specified host using dig\n\n"));
+ printf ("Copyright (c) 2000 Karl DeBisschop <kdebisschop@users.sourceforge.net>\n");
+ printf (COPYRIGHT, copyright, email);
- print_usage ();
+ printf (_("This plugin test the DNS service on the specified host using dig"));
- printf (_(UT_HELP_VRSN));
+ printf ("\n\n");
- printf (_(UT_HOST_PORT), 'P', myport);
+ print_usage ();
- printf (_("\
- -l, --lookup=STRING\n\
- machine name to lookup\n"));
+ printf (UT_HELP_VRSN);
- printf (_("\
- -T, --record_type=STRING\n\
- record type to lookup (default: A)\n"));
+ printf (UT_EXTRA_OPTS);
- printf (_("\
- -a, --expected_address=STRING\n\
- an address expected to be in the asnwer section.\n\
- if not set, uses whatever was in -l\n"));
+ printf (UT_HOST_PORT, 'p', myport);
- printf (_(UT_WARN_CRIT));
+ printf (" %s\n","-l, --query_address=STRING");
+ printf (" %s\n",_("Machine name to lookup"));
+ printf (" %s\n","-T, --record_type=STRING");
+ printf (" %s\n",_("Record type to lookup (default: A)"));
+ printf (" %s\n","-a, --expected_address=STRING");
+ printf (" %s\n",_("An address expected to be in the answer section. If not set, uses whatever"));
+ printf (" %s\n",_("was in -l"));
+ printf (" %s\n","-A, --dig-arguments=STRING");
+ printf (" %s\n",_("Pass STRING as argument(s) to dig"));
+ printf (UT_WARN_CRIT);
+ printf (UT_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
+ printf (UT_VERBOSE);
- printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
+ printf ("\n");
+ printf ("%s\n", _("Examples:"));
+ printf (" %s\n", "check_dig -H DNSSERVER -l www.example.com -A \"+tcp\"");
+ printf (" %s\n", "This will send a tcp query to DNSSERVER for www.example.com");
- printf (_(UT_VERBOSE));
+#ifdef NP_EXTRA_OPTS
+ printf ("\n");
+ printf ("%s\n", _("Notes:"));
+ printf (UT_EXTRA_OPTS_NOTES);
+#endif
- printf (_(UT_SUPPORT));
+ printf (UT_SUPPORT);
}
void
print_usage (void)
{
- printf ("\
-Usage: %s -H host -l lookup [-p <server port>] [-T <query type>]\n\
- [-w <warning interval>] [-c <critical interval>] [-t <timeout>]\n\
- [-a <expected answer address>] [-v]\n", progname);
+ printf (_("Usage:"));
+ printf ("%s -l <query_address> [-H <host>] [-p <server port>]\n", progname);
+ printf (" [-T <query type>] [-w <warning interval>] [-c <critical interval>]\n");
+ printf (" [-t <timeout>] [-a <expected answer address>] [-v]\n");
}