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authorThomas Guyot-Sionnest <dermoth@users.sourceforge.net>2007-11-23 21:47:04 +0000
committerThomas Guyot-Sionnest <dermoth@users.sourceforge.net>2007-11-23 21:47:04 +0000
commit97131650ea6bf9f16b775743e9931a91ea441887 (patch)
treeacf692480460cd671de554bbecf32487f334e3b6 /plugins/check_time_ntp.c
parent643e6a0a4fc787541371aef9369d42b5cd250f91 (diff)
downloadmonitoring-plugins-97131650ea6bf9f16b775743e9931a91ea441887.tar.gz
Rename check_ntp* and merge change in Trunk
git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/branches/dermoth_ntp_rework@1832 f882894a-f735-0410-b71e-b25c423dba1c
Diffstat (limited to 'plugins/check_time_ntp.c')
-rw-r--r--plugins/check_time_ntp.c615
1 files changed, 0 insertions, 615 deletions
diff --git a/plugins/check_time_ntp.c b/plugins/check_time_ntp.c
deleted file mode 100644
index c945076d..00000000
--- a/plugins/check_time_ntp.c
+++ /dev/null
@@ -1,615 +0,0 @@
1/******************************************************************************
2*
3* Nagios check_ntp_time plugin
4*
5* License: GPL
6* Copyright (c) 2006 sean finney <seanius@seanius.net>
7* Copyright (c) 2007 nagios-plugins team
8*
9* Last Modified: $Date$
10*
11* Description:
12*
13* This file contains the check_ntp_time plugin
14*
15* This plugin checks the clock offset with an NTP server. It is
16* independant of any commandline programs or external libraries.
17*
18*
19* License Information:
20*
21* This program is free software; you can redistribute it and/or modify
22* it under the terms of the GNU General Public License as published by
23* the Free Software Foundation; either version 2 of the License, or
24* (at your option) any later version.
25*
26* This program is distributed in the hope that it will be useful,
27* but WITHOUT ANY WARRANTY; without even the implied warranty of
28* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29* GNU General Public License for more details.
30*
31* You should have received a copy of the GNU General Public License
32* along with this program; if not, write to the Free Software
33* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
34
35 $Id$
36
37*****************************************************************************/
38
39const char *progname = "check_ntp_time";
40const char *revision = "$Revision$";
41const char *copyright = "2007";
42const char *email = "nagiosplug-devel@lists.sourceforge.net";
43
44#include "common.h"
45#include "netutils.h"
46#include "utils.h"
47
48static char *server_address=NULL;
49static int verbose=0;
50static char *owarn="60";
51static char *ocrit="120";
52
53int process_arguments (int, char **);
54thresholds *offset_thresholds = NULL;
55void print_help (void);
56void print_usage (void);
57
58/* number of times to perform each request to get a good average. */
59#define AVG_NUM 4
60
61/* max size of control message data */
62#define MAX_CM_SIZE 468
63
64/* this structure holds everything in an ntp request/response as per rfc1305 */
65typedef struct {
66 uint8_t flags; /* byte with leapindicator,vers,mode. see macros */
67 uint8_t stratum; /* clock stratum */
68 int8_t poll; /* polling interval */
69 int8_t precision; /* precision of the local clock */
70 int32_t rtdelay; /* total rt delay, as a fixed point num. see macros */
71 uint32_t rtdisp; /* like above, but for max err to primary src */
72 uint32_t refid; /* ref clock identifier */
73 uint64_t refts; /* reference timestamp. local time local clock */
74 uint64_t origts; /* time at which request departed client */
75 uint64_t rxts; /* time at which request arrived at server */
76 uint64_t txts; /* time at which request departed server */
77} ntp_message;
78
79/* this structure holds data about results from querying offset from a peer */
80typedef struct {
81 time_t waiting; /* ts set when we started waiting for a response */
82 int num_responses; /* number of successfully recieved responses */
83 uint8_t stratum; /* copied verbatim from the ntp_message */
84 double rtdelay; /* converted from the ntp_message */
85 double rtdisp; /* converted from the ntp_message */
86 double offset[AVG_NUM]; /* offsets from each response */
87 uint8_t flags; /* byte with leapindicator,vers,mode. see macros */
88} ntp_server_results;
89
90/* bits 1,2 are the leap indicator */
91#define LI_MASK 0xc0
92#define LI(x) ((x&LI_MASK)>>6)
93#define LI_SET(x,y) do{ x |= ((y<<6)&LI_MASK); }while(0)
94/* and these are the values of the leap indicator */
95#define LI_NOWARNING 0x00
96#define LI_EXTRASEC 0x01
97#define LI_MISSINGSEC 0x02
98#define LI_ALARM 0x03
99/* bits 3,4,5 are the ntp version */
100#define VN_MASK 0x38
101#define VN(x) ((x&VN_MASK)>>3)
102#define VN_SET(x,y) do{ x |= ((y<<3)&VN_MASK); }while(0)
103#define VN_RESERVED 0x02
104/* bits 6,7,8 are the ntp mode */
105#define MODE_MASK 0x07
106#define MODE(x) (x&MODE_MASK)
107#define MODE_SET(x,y) do{ x |= (y&MODE_MASK); }while(0)
108/* here are some values */
109#define MODE_CLIENT 0x03
110#define MODE_CONTROLMSG 0x06
111/* In control message, bits 8-10 are R,E,M bits */
112#define REM_MASK 0xe0
113#define REM_RESP 0x80
114#define REM_ERROR 0x40
115#define REM_MORE 0x20
116/* In control message, bits 11 - 15 are opcode */
117#define OP_MASK 0x1f
118#define OP_SET(x,y) do{ x |= (y&OP_MASK); }while(0)
119#define OP_READSTAT 0x01
120#define OP_READVAR 0x02
121/* In peer status bytes, bits 6,7,8 determine clock selection status */
122#define PEER_SEL(x) ((ntohs(x)>>8)&0x07)
123#define PEER_INCLUDED 0x04
124#define PEER_SYNCSOURCE 0x06
125
126/**
127 ** a note about the 32-bit "fixed point" numbers:
128 **
129 they are divided into halves, each being a 16-bit int in network byte order:
130 - the first 16 bits are an int on the left side of a decimal point.
131 - the second 16 bits represent a fraction n/(2^16)
132 likewise for the 64-bit "fixed point" numbers with everything doubled :)
133 **/
134
135/* macros to access the left/right 16 bits of a 32-bit ntp "fixed point"
136 number. note that these can be used as lvalues too */
137#define L16(x) (((uint16_t*)&x)[0])
138#define R16(x) (((uint16_t*)&x)[1])
139/* macros to access the left/right 32 bits of a 64-bit ntp "fixed point"
140 number. these too can be used as lvalues */
141#define L32(x) (((uint32_t*)&x)[0])
142#define R32(x) (((uint32_t*)&x)[1])
143
144/* ntp wants seconds since 1/1/00, epoch is 1/1/70. this is the difference */
145#define EPOCHDIFF 0x83aa7e80UL
146
147/* extract a 32-bit ntp fixed point number into a double */
148#define NTP32asDOUBLE(x) (ntohs(L16(x)) + (double)ntohs(R16(x))/65536.0)
149
150/* likewise for a 64-bit ntp fp number */
151#define NTP64asDOUBLE(n) (double)(((uint64_t)n)?\
152 (ntohl(L32(n))-EPOCHDIFF) + \
153 (.00000001*(0.5+(double)(ntohl(R32(n))/42.94967296))):\
154 0)
155
156/* convert a struct timeval to a double */
157#define TVasDOUBLE(x) (double)(x.tv_sec+(0.000001*x.tv_usec))
158
159/* convert an ntp 64-bit fp number to a struct timeval */
160#define NTP64toTV(n,t) \
161 do{ if(!n) t.tv_sec = t.tv_usec = 0; \
162 else { \
163 t.tv_sec=ntohl(L32(n))-EPOCHDIFF; \
164 t.tv_usec=(int)(0.5+(double)(ntohl(R32(n))/4294.967296)); \
165 } \
166 }while(0)
167
168/* convert a struct timeval to an ntp 64-bit fp number */
169#define TVtoNTP64(t,n) \
170 do{ if(!t.tv_usec && !t.tv_sec) n=0x0UL; \
171 else { \
172 L32(n)=htonl(t.tv_sec + EPOCHDIFF); \
173 R32(n)=htonl((uint64_t)((4294.967296*t.tv_usec)+.5)); \
174 } \
175 } while(0)
176
177/* NTP control message header is 12 bytes, plus any data in the data
178 * field, plus null padding to the nearest 32-bit boundary per rfc.
179 */
180#define SIZEOF_NTPCM(m) (12+ntohs(m.count)+((m.count)?4-(ntohs(m.count)%4):0))
181
182/* finally, a little helper or two for debugging: */
183#define DBG(x) do{if(verbose>1){ x; }}while(0);
184#define PRINTSOCKADDR(x) \
185 do{ \
186 printf("%u.%u.%u.%u", (x>>24)&0xff, (x>>16)&0xff, (x>>8)&0xff, x&0xff);\
187 }while(0);
188
189/* calculate the offset of the local clock */
190static inline double calc_offset(const ntp_message *m, const struct timeval *t){
191 double client_tx, peer_rx, peer_tx, client_rx;
192 client_tx = NTP64asDOUBLE(m->origts);
193 peer_rx = NTP64asDOUBLE(m->rxts);
194 peer_tx = NTP64asDOUBLE(m->txts);
195 client_rx=TVasDOUBLE((*t));
196 return (.5*((peer_tx-client_rx)+(peer_rx-client_tx)));
197}
198
199/* print out a ntp packet in human readable/debuggable format */
200void print_ntp_message(const ntp_message *p){
201 struct timeval ref, orig, rx, tx;
202
203 NTP64toTV(p->refts,ref);
204 NTP64toTV(p->origts,orig);
205 NTP64toTV(p->rxts,rx);
206 NTP64toTV(p->txts,tx);
207
208 printf("packet contents:\n");
209 printf("\tflags: 0x%.2x\n", p->flags);
210 printf("\t li=%d (0x%.2x)\n", LI(p->flags), p->flags&LI_MASK);
211 printf("\t vn=%d (0x%.2x)\n", VN(p->flags), p->flags&VN_MASK);
212 printf("\t mode=%d (0x%.2x)\n", MODE(p->flags), p->flags&MODE_MASK);
213 printf("\tstratum = %d\n", p->stratum);
214 printf("\tpoll = %g\n", pow(2, p->poll));
215 printf("\tprecision = %g\n", pow(2, p->precision));
216 printf("\trtdelay = %-.16g\n", NTP32asDOUBLE(p->rtdelay));
217 printf("\trtdisp = %-.16g\n", NTP32asDOUBLE(p->rtdisp));
218 printf("\trefid = %x\n", p->refid);
219 printf("\trefts = %-.16g\n", NTP64asDOUBLE(p->refts));
220 printf("\torigts = %-.16g\n", NTP64asDOUBLE(p->origts));
221 printf("\trxts = %-.16g\n", NTP64asDOUBLE(p->rxts));
222 printf("\ttxts = %-.16g\n", NTP64asDOUBLE(p->txts));
223}
224
225void setup_request(ntp_message *p){
226 struct timeval t;
227
228 memset(p, 0, sizeof(ntp_message));
229 LI_SET(p->flags, LI_ALARM);
230 VN_SET(p->flags, 4);
231 MODE_SET(p->flags, MODE_CLIENT);
232 p->poll=4;
233 p->precision=(int8_t)0xfa;
234 L16(p->rtdelay)=htons(1);
235 L16(p->rtdisp)=htons(1);
236
237 gettimeofday(&t, NULL);
238 TVtoNTP64(t,p->txts);
239}
240
241/* select the "best" server from a list of servers, and return its index.
242 * this is done by filtering servers based on stratum, dispersion, and
243 * finally round-trip delay. */
244int best_offset_server(const ntp_server_results *slist, int nservers){
245 int i=0, j=0, cserver=0, candidates[5], csize=0;
246
247 /* for each server */
248 for(cserver=0; cserver<nservers; cserver++){
249 /* sort out servers with error flags */
250 if ( LI(slist[cserver].flags) != LI_NOWARNING ){
251 if (verbose) printf("discarding peer id %d: flags=%d\n", cserver, LI(slist[cserver].flags));
252 break;
253 }
254
255 /* compare it to each of the servers already in the candidate list */
256 for(i=0; i<csize; i++){
257 /* does it have an equal or better stratum? */
258 if(slist[cserver].stratum <= slist[i].stratum){
259 /* does it have an equal or better dispersion? */
260 if(slist[cserver].rtdisp <= slist[i].rtdisp){
261 /* does it have a better rtdelay? */
262 if(slist[cserver].rtdelay < slist[i].rtdelay){
263 break;
264 }
265 }
266 }
267 }
268
269 /* if we haven't reached the current list's end, move everyone
270 * over one to the right, and insert the new candidate */
271 if(i<csize){
272 for(j=5; j>i; j--){
273 candidates[j]=candidates[j-1];
274 }
275 }
276 /* regardless, if they should be on the list... */
277 if(i<5) {
278 candidates[i]=cserver;
279 if(csize<5) csize++;
280 /* otherwise discard the server */
281 } else {
282 DBG(printf("discarding peer id %d\n", cserver));
283 }
284 }
285
286 if(csize>0) {
287 DBG(printf("best server selected: peer %d\n", candidates[0]));
288 return candidates[0];
289 } else {
290 DBG(printf("no peers meeting synchronization criteria :(\n"));
291 return -1;
292 }
293}
294
295/* do everything we need to get the total average offset
296 * - we use a certain amount of parallelization with poll() to ensure
297 * we don't waste time sitting around waiting for single packets.
298 * - we also "manually" handle resolving host names and connecting, because
299 * we have to do it in a way that our lazy macros don't handle currently :( */
300double offset_request(const char *host, int *status){
301 int i=0, j=0, ga_result=0, num_hosts=0, *socklist=NULL, respnum=0;
302 int servers_completed=0, one_written=0, one_read=0, servers_readable=0, best_index=-1;
303 time_t now_time=0, start_ts=0;
304 ntp_message *req=NULL;
305 double avg_offset=0.;
306 struct timeval recv_time;
307 struct addrinfo *ai=NULL, *ai_tmp=NULL, hints;
308 struct pollfd *ufds=NULL;
309 ntp_server_results *servers=NULL;
310
311 /* setup hints to only return results from getaddrinfo that we'd like */
312 memset(&hints, 0, sizeof(struct addrinfo));
313 hints.ai_family = address_family;
314 hints.ai_protocol = IPPROTO_UDP;
315 hints.ai_socktype = SOCK_DGRAM;
316
317 /* fill in ai with the list of hosts resolved by the host name */
318 ga_result = getaddrinfo(host, "123", &hints, &ai);
319 if(ga_result!=0){
320 die(STATE_UNKNOWN, "error getting address for %s: %s\n",
321 host, gai_strerror(ga_result));
322 }
323
324 /* count the number of returned hosts, and allocate stuff accordingly */
325 for(ai_tmp=ai; ai_tmp!=NULL; ai_tmp=ai_tmp->ai_next){ num_hosts++; }
326 req=(ntp_message*)malloc(sizeof(ntp_message)*num_hosts);
327 if(req==NULL) die(STATE_UNKNOWN, "can not allocate ntp message array");
328 socklist=(int*)malloc(sizeof(int)*num_hosts);
329 if(socklist==NULL) die(STATE_UNKNOWN, "can not allocate socket array");
330 ufds=(struct pollfd*)malloc(sizeof(struct pollfd)*num_hosts);
331 if(ufds==NULL) die(STATE_UNKNOWN, "can not allocate socket array");
332 servers=(ntp_server_results*)malloc(sizeof(ntp_server_results)*num_hosts);
333 if(servers==NULL) die(STATE_UNKNOWN, "can not allocate server array");
334 memset(servers, 0, sizeof(ntp_server_results)*num_hosts);
335
336 /* setup each socket for writing, and the corresponding struct pollfd */
337 ai_tmp=ai;
338 for(i=0;ai_tmp;i++){
339 socklist[i]=socket(ai_tmp->ai_family, SOCK_DGRAM, IPPROTO_UDP);
340 if(socklist[i] == -1) {
341 perror(NULL);
342 die(STATE_UNKNOWN, "can not create new socket");
343 }
344 if(connect(socklist[i], ai_tmp->ai_addr, ai_tmp->ai_addrlen)){
345 die(STATE_UNKNOWN, "can't create socket connection");
346 } else {
347 ufds[i].fd=socklist[i];
348 ufds[i].events=POLLIN;
349 ufds[i].revents=0;
350 }
351 ai_tmp = ai_tmp->ai_next;
352 }
353
354 /* now do AVG_NUM checks to each host. we stop before timeout/2 seconds
355 * have passed in order to ensure post-processing and jitter time. */
356 now_time=start_ts=time(NULL);
357 while(servers_completed<num_hosts && now_time-start_ts <= socket_timeout/2){
358 /* loop through each server and find each one which hasn't
359 * been touched in the past second or so and is still lacking
360 * some responses. for each of these servers, send a new request,
361 * and update the "waiting" timestamp with the current time. */
362 one_written=0;
363 now_time=time(NULL);
364
365 for(i=0; i<num_hosts; i++){
366 if(servers[i].waiting<now_time && servers[i].num_responses<AVG_NUM){
367 if(verbose && servers[i].waiting != 0) printf("re-");
368 if(verbose) printf("sending request to peer %d\n", i);
369 setup_request(&req[i]);
370 write(socklist[i], &req[i], sizeof(ntp_message));
371 servers[i].waiting=now_time;
372 one_written=1;
373 break;
374 }
375 }
376
377 /* quickly poll for any sockets with pending data */
378 servers_readable=poll(ufds, num_hosts, 100);
379 if(servers_readable==-1){
380 perror("polling ntp sockets");
381 die(STATE_UNKNOWN, "communication errors");
382 }
383
384 /* read from any sockets with pending data */
385 for(i=0; servers_readable && i<num_hosts; i++){
386 if(ufds[i].revents&POLLIN && servers[i].num_responses < AVG_NUM){
387 if(verbose) {
388 printf("response from peer %d: ", i);
389 }
390
391 read(ufds[i].fd, &req[i], sizeof(ntp_message));
392 gettimeofday(&recv_time, NULL);
393 DBG(print_ntp_message(&req[i]));
394 respnum=servers[i].num_responses++;
395 servers[i].offset[respnum]=calc_offset(&req[i], &recv_time);
396 if(verbose) {
397 printf("offset %.10g\n", servers[i].offset[respnum]);
398 }
399 servers[i].stratum=req[i].stratum;
400 servers[i].rtdisp=NTP32asDOUBLE(req[i].rtdisp);
401 servers[i].rtdelay=NTP32asDOUBLE(req[i].rtdelay);
402 servers[i].waiting=0;
403 servers[i].flags=req[i].flags;
404 servers_readable--;
405 one_read = 1;
406 if(servers[i].num_responses==AVG_NUM) servers_completed++;
407 }
408 }
409 /* lather, rinse, repeat. */
410 }
411
412 if (one_read == 0) {
413 die(STATE_CRITICAL, "NTP CRITICAL: No response from NTP server\n");
414 }
415
416 /* now, pick the best server from the list */
417 best_index=best_offset_server(servers, num_hosts);
418 if(best_index < 0){
419 *status=STATE_UNKNOWN;
420 } else {
421 /* finally, calculate the average offset */
422 for(i=0; i<servers[best_index].num_responses;i++){
423 avg_offset+=servers[best_index].offset[j];
424 }
425 avg_offset/=servers[best_index].num_responses;
426 }
427
428 /* cleanup */
429 for(j=0; j<num_hosts; j++){ close(socklist[j]); }
430 free(socklist);
431 free(ufds);
432 free(servers);
433 free(req);
434 freeaddrinfo(ai);
435
436 if(verbose) printf("overall average offset: %.10g\n", avg_offset);
437 return avg_offset;
438}
439
440int process_arguments(int argc, char **argv){
441 int c;
442 int option=0;
443 static struct option longopts[] = {
444 {"version", no_argument, 0, 'V'},
445 {"help", no_argument, 0, 'h'},
446 {"verbose", no_argument, 0, 'v'},
447 {"use-ipv4", no_argument, 0, '4'},
448 {"use-ipv6", no_argument, 0, '6'},
449 {"warning", required_argument, 0, 'w'},
450 {"critical", required_argument, 0, 'c'},
451 {"timeout", required_argument, 0, 't'},
452 {"hostname", required_argument, 0, 'H'},
453 {0, 0, 0, 0}
454 };
455
456
457 if (argc < 2)
458 usage ("\n");
459
460 while (1) {
461 c = getopt_long (argc, argv, "Vhv46w:c:t:H:", longopts, &option);
462 if (c == -1 || c == EOF || c == 1)
463 break;
464
465 switch (c) {
466 case 'h':
467 print_help();
468 exit(STATE_OK);
469 break;
470 case 'V':
471 print_revision(progname, revision);
472 exit(STATE_OK);
473 break;
474 case 'v':
475 verbose++;
476 break;
477 case 'w':
478 owarn = optarg;
479 break;
480 case 'c':
481 ocrit = optarg;
482 break;
483 case 'H':
484 if(is_host(optarg) == FALSE)
485 usage2(_("Invalid hostname/address"), optarg);
486 server_address = strdup(optarg);
487 break;
488 case 't':
489 socket_timeout=atoi(optarg);
490 break;
491 case '4':
492 address_family = AF_INET;
493 break;
494 case '6':
495#ifdef USE_IPV6
496 address_family = AF_INET6;
497#else
498 usage4 (_("IPv6 support not available"));
499#endif
500 break;
501 case '?':
502 /* print short usage statement if args not parsable */
503 usage5 ();
504 break;
505 }
506 }
507
508 if(server_address == NULL){
509 usage4(_("Hostname was not supplied"));
510 }
511
512 return 0;
513}
514
515char *perfd_offset (double offset)
516{
517 return fperfdata ("offset", offset, "s",
518 TRUE, offset_thresholds->warning->end,
519 TRUE, offset_thresholds->critical->end,
520 FALSE, 0, FALSE, 0);
521}
522
523int main(int argc, char *argv[]){
524 int result, offset_result;
525 double offset=0;
526 char *result_line, *perfdata_line;
527
528 result = offset_result = STATE_OK;
529
530 if (process_arguments (argc, argv) == ERROR)
531 usage4 (_("Could not parse arguments"));
532
533 set_thresholds(&offset_thresholds, owarn, ocrit);
534
535 /* initialize alarm signal handling */
536 signal (SIGALRM, socket_timeout_alarm_handler);
537
538 /* set socket timeout */
539 alarm (socket_timeout);
540
541 offset = offset_request(server_address, &offset_result);
542 if (offset_result == STATE_UNKNOWN) {
543 result = STATE_CRITICAL;
544 } else {
545 result = get_status(fabs(offset), offset_thresholds);
546 }
547
548 switch (result) {
549 case STATE_CRITICAL :
550 asprintf(&result_line, "NTP CRITICAL:");
551 break;
552 case STATE_WARNING :
553 asprintf(&result_line, "NTP WARNING:");
554 break;
555 case STATE_OK :
556 asprintf(&result_line, "NTP OK:");
557 break;
558 default :
559 asprintf(&result_line, "NTP UNKNOWN:");
560 break;
561 }
562 if(offset_result == STATE_UNKNOWN){
563 asprintf(&result_line, "%s %s", result_line, _("Offset unknown"));
564 asprintf(&perfdata_line, "");
565 } else {
566 asprintf(&result_line, "%s Offset %.10g secs", result_line, offset);
567 asprintf(&perfdata_line, "%s", perfd_offset(offset));
568 }
569 printf("%s|%s\n", result_line, perfdata_line);
570
571 if(server_address!=NULL) free(server_address);
572 return result;
573}
574
575void print_help(void){
576 print_revision(progname, revision);
577
578 printf ("Copyright (c) 2006 Sean Finney\n");
579 printf (COPYRIGHT, copyright, email);
580
581 printf ("%s\n", _("This plugin checks the clock offset with the ntp server"));
582
583 printf ("\n\n");
584
585 print_usage();
586 printf (_(UT_HELP_VRSN));
587 printf (_(UT_HOST_PORT), 'p', "123");
588 printf (" %s\n", "-w, --warning=THRESHOLD");
589 printf (" %s\n", _("Offset to result in warning status (seconds)"));
590 printf (" %s\n", "-c, --critical=THRESHOLD");
591 printf (" %s\n", _("Offset to result in critical status (seconds)"));
592 printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
593 printf (_(UT_VERBOSE));
594
595 printf("\n");
596 printf("%s\n", _("Notes:"));
597 printf(" %s\n", _("See:"));
598 printf(" %s\n", ("http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT"));
599 printf(" %s\n", _("for THRESHOLD format and examples."));
600
601 printf("\n");
602 printf("%s\n", _("Examples:"));
603 printf(" %s\n", ("./check_ntp_time -H ntpserv -w 0.5 -c 1"));
604
605 printf (_(UT_SUPPORT));
606}
607
608void
609print_usage(void)
610{
611 printf (_("Usage:"));
612 printf(" %s -H <host> [-w <warn>] [-c <crit>] [-W <warn>] [-C <crit>]\n", progname);
613 printf(" [-j <warn>] [-k <crit>] [-v verbose]\n");
614}
615