Code

remove UT_HLP_VRS from print_usage
[nagiosplug.git] / plugins / check_dig.c
1 /*****************************************************************************
3  This program is free software; you can redistribute it and/or modify
4  it under the terms of the GNU General Public License as published by
5  the Free Software Foundation; either version 2 of the License, or
6  (at your option) any later version.
8  This program is distributed in the hope that it will be useful,
9  but WITHOUT ANY WARRANTY; without even the implied warranty of
10  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  GNU General Public License for more details.
13  You should have received a copy of the GNU General Public License
14  along with this program; if not, write to the Free Software
15  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17  $Id$
18  
19 *****************************************************************************/
21 const char *progname = "check_dig";
22 const char *revision = "$Revision$";
23 const char *copyright = "2002-2003";
24 const char *email = "nagiosplug-devel@lists.sourceforge.net";
26 #include "common.h"
27 #include "netutils.h"
28 #include "utils.h"
29 #include "popen.h"
31 int process_arguments (int, char **);
32 int validate_arguments (void);
33 void print_help (void);
34 void print_usage (void);
36 enum {
37         UNDEFINED = 0,
38         DEFAULT_PORT = 53
39 };
41 char *query_address = NULL;
42 char *record_type = "A";
43 char *expected_address = NULL;
44 char *dns_server = NULL;
45 int verbose = FALSE;
46 int server_port = DEFAULT_PORT;
47 double warning_interval = UNDEFINED;
48 double critical_interval = UNDEFINED;
49 struct timeval tv;
51 int
52 main (int argc, char **argv)
53 {
54         char input_buffer[MAX_INPUT_BUFFER];
55         char *command_line;
56         char *output;
57         long microsec;
58         double elapsed_time;
59         int result = STATE_UNKNOWN;
61         output = strdup ("");
63         setlocale (LC_ALL, "");
64         bindtextdomain (PACKAGE, LOCALEDIR);
65         textdomain (PACKAGE);
67         /* Set signal handling and alarm */
68         if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR)
69                 usage4 (_("Cannot catch SIGALRM"));
71         if (process_arguments (argc, argv) != TRUE)
72                 usage4 (_("Could not parse arguments"));
74         /* get the command to run */
75         asprintf (&command_line, "%s @%s -p %d %s -t %s",
76                   PATH_TO_DIG, dns_server, server_port, query_address, record_type);
78         alarm (timeout_interval);
79         gettimeofday (&tv, NULL);
81         if (verbose) {
82                 printf ("%s\n", command_line);
83                 if(expected_address != NULL) {
84                         printf ("Looking for: '%s'\n", expected_address);
85                 } else {
86                         printf ("Looking for: '%s'\n", query_address);
87                 }
88         }
90         /* run the command */
91         child_process = spopen (command_line);
92         if (child_process == NULL) {
93                 printf (_("Could not open pipe: %s\n"), command_line);
94                 return STATE_UNKNOWN;
95         }
97         child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
98         if (child_stderr == NULL)
99                 printf (_("Could not open stderr for %s\n"), command_line);
101         while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
103                 /* the server is responding, we just got the host name... */
104                 if (strstr (input_buffer, ";; ANSWER SECTION:")) {
106                         /* loop through the whole 'ANSWER SECTION' */
107                         do {
108                                 /* get the host address */
109                                 if (!fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process))
110                                         break;
112                                 if (strpbrk (input_buffer, "\r\n"))
113                                         input_buffer[strcspn (input_buffer, "\r\n")] = '\0';
115                                 if (verbose && !strstr (input_buffer, ";; ")) 
116                                         printf ("%s\n", input_buffer); 
118                                 if (expected_address==NULL && strstr (input_buffer, query_address) != NULL) {
119                                         output = strdup(input_buffer);
120                                         result = STATE_OK;
121                                 }
122                                 else if (expected_address != NULL && strstr (input_buffer, expected_address) != NULL) {
123                                         output = strdup(input_buffer);
124                                         result = STATE_OK;
125                                 }
127                         } while (!strstr (input_buffer, ";; "));
129                         if (result == STATE_UNKNOWN) {
130                                 asprintf (&output, _("Server not found in ANSWER SECTION"));
131                                 result = STATE_WARNING;
132                         }
133                 }
135         }
137         if (result == STATE_UNKNOWN) {
138                 asprintf (&output, _("No ANSWER SECTION found"));
139         }
141         while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr)) {
142                 /* If we get anything on STDERR, at least set warning */
143                 result = max_state (result, STATE_WARNING);
144                 printf ("%s", input_buffer);
145                 if (strlen (output) == 0)
146                         output = strdup (1 + index (input_buffer, ':'));
147         }
149         (void) fclose (child_stderr);
151         /* close the pipe */
152         if (spclose (child_process)) {
153                 result = max_state (result, STATE_WARNING);
154                 if (strlen (output) == 0)
155                         asprintf (&output, _("dig returned an error status"));
156         }
158         microsec = deltime (tv);
159         elapsed_time = (double)microsec / 1.0e6;
161         if (output == NULL || strlen (output) == 0)
162                 asprintf (&output, _(" Probably a non-existent host/domain"));
164         if (critical_interval > UNDEFINED && elapsed_time > critical_interval)
165                 result = STATE_CRITICAL;
167         else if (warning_interval > UNDEFINED && elapsed_time > warning_interval)
168                 result = STATE_WARNING;
170         asprintf (&output, _("%.3f seconds response time (%s)"), elapsed_time, output);
172         printf ("DNS %s - %s|%s\n",
173                 state_text (result), output,
174                 fperfdata("time", elapsed_time, "s",
175                          (warning_interval>UNDEFINED?TRUE:FALSE),
176                          warning_interval,
177                          (critical_interval>UNDEFINED?TRUE:FALSE),
178                          critical_interval,
179                                                                          TRUE, 0, FALSE, 0));
180         return result;
185 /* process command-line arguments */
186 int
187 process_arguments (int argc, char **argv)
189         int c;
191         int option = 0;
192         static struct option longopts[] = {
193                 {"hostname", required_argument, 0, 'H'},
194                 {"query_address", required_argument, 0, 'l'},
195                 {"warning", required_argument, 0, 'w'},
196                 {"critical", required_argument, 0, 'c'},
197                 {"timeout", required_argument, 0, 't'},
198                 {"verbose", no_argument, 0, 'v'},
199                 {"version", no_argument, 0, 'V'},
200                 {"help", no_argument, 0, 'h'},
201                 {"record_type", required_argument, 0, 'T'},
202                 {"expected_address", required_argument, 0, 'a'},
203                 {0, 0, 0, 0}
204         };
206         if (argc < 2)
207                 return ERROR;
209         while (1) {
210                 c = getopt_long (argc, argv, "hVvt:l:H:w:c:T:a:", longopts, &option);
212                 if (c == -1 || c == EOF)
213                         break;
215                 switch (c) {
216                 case '?':                                                                       /* help */
217                         printf (_("%s: Unknown argument: %s\n\n"), progname, optarg);
218                         print_usage ();
219                         exit (STATE_UNKNOWN);
220                 case 'h':                                                                       /* help */
221                         print_help ();
222                         exit (STATE_OK);
223                 case 'V':                                                                       /* version */
224                         print_revision (progname, "$Revision$");
225                         exit (STATE_OK);
226                 case 'H':                                                                       /* hostname */
227                         if (is_host (optarg)) {
228                                 dns_server = optarg;
229                         }
230                         else {
231                                 usage2 (_("Invalid hostname/address"), optarg);
232                         }
233                         break;
234                 case 'p':                 /* server port */
235                         if (is_intpos (optarg)) {
236                                 server_port = atoi (optarg);
237                         }
238                         else {
239                                 usage2 (_("Port must be a positive integer"), optarg);
240                         }
241                         break;
242                 case 'l':                                                                       /* address to lookup */
243                         query_address = optarg;
244                         break;
245                 case 'w':                                                                       /* warning */
246                         if (is_nonnegative (optarg)) {
247                                 warning_interval = strtod (optarg, NULL);
248                         }
249                         else {
250                                 usage2 (_("Warning interval must be a positive integer"), optarg);
251                         }
252                         break;
253                 case 'c':                                                                       /* critical */
254                         if (is_nonnegative (optarg)) {
255                                 critical_interval = strtod (optarg, NULL);
256                         }
257                         else {
258                                 usage2 (_("Critical interval must be a positive integer"), optarg);
259                         }
260                         break;
261                 case 't':                                                                       /* timeout */
262                         if (is_intnonneg (optarg)) {
263                                 timeout_interval = atoi (optarg);
264                         }
265                         else {
266                                 usage2 (_("Timeout interval must be a positive integer"), optarg);
267                         }
268                         break;
269                 case 'v':                                                                       /* verbose */
270                         verbose = TRUE;
271                         break;
272                 case 'T':
273                         record_type = optarg;
274                         break;
275                 case 'a':
276                         expected_address = optarg;
277                         break;
278                 }
279         }
281         c = optind;
282         if (dns_server == NULL) {
283                 if (c < argc) {
284                         if (is_host (argv[c])) {
285                                 dns_server = argv[c];
286                         }
287                         else {
288                                 usage2 (_("Invalid hostname/address"), argv[c]);
289                         }
290                 }
291                 else {
292                         dns_server = strdup ("127.0.0.1");
293                 }
294         }
296         return validate_arguments ();
301 int
302 validate_arguments (void)
304         return OK;
309 void
310 print_help (void)
312         char *myport;
314         asprintf (&myport, "%d", DEFAULT_PORT);
316         print_revision (progname, revision);
318         printf ("Copyright (c) 2000 Karl DeBisschop <kdebisschop@users.sourceforge.net>\n");
319         printf (COPYRIGHT, copyright, email);
321         printf (_("Test the DNS service on the specified host using dig\n"));
323         print_usage ();
325         printf (_(UT_HELP_VRSN));
327         printf (_(UT_HOST_PORT), 'P', myport);
329         printf (_("\
330  -l, --lookup=STRING\n\
331    machine name to lookup\n"));
333         printf (_("\
334  -T, --record_type=STRING\n\
335    record type to lookup (default: A)\n"));
337         printf (_("\
338  -a, --expected_address=STRING\n\
339    an address expected to be in the asnwer section.\n\
340    if not set, uses whatever was in -l\n"));
342         printf (_(UT_WARN_CRIT));
344         printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
346         printf (_(UT_VERBOSE));
348         printf (_(UT_SUPPORT));
353 void
354 print_usage (void)
356         printf ("\
357 Usage: %s -H host -l lookup [-p <server port>] [-T <query type>]\n\
358          [-w <warning interval>] [-c <critical interval>] [-t <timeout>]\n\
359          [-a <expected answer address>] [-v]\n", progname);