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-rw-r--r--plugins/check_ntp_time.c628
1 files changed, 328 insertions, 300 deletions
diff --git a/plugins/check_ntp_time.c b/plugins/check_ntp_time.c
index b2e16556..703b69df 100644
--- a/plugins/check_ntp_time.c
+++ b/plugins/check_ntp_time.c
@@ -1,63 +1,63 @@
1/***************************************************************************** 1/*****************************************************************************
2* 2 *
3* Monitoring check_ntp_time plugin 3 * Monitoring check_ntp_time plugin
4* 4 *
5* License: GPL 5 * License: GPL
6* Copyright (c) 2006 Sean Finney <seanius@seanius.net> 6 * Copyright (c) 2006 Sean Finney <seanius@seanius.net>
7* Copyright (c) 2006-2008 Monitoring Plugins Development Team 7 * Copyright (c) 2006-2024 Monitoring Plugins Development Team
8* 8 *
9* Description: 9 * Description:
10* 10 *
11* This file contains the check_ntp_time plugin 11 * This file contains the check_ntp_time plugin
12* 12 *
13* This plugin checks the clock offset between the local host and a 13 * This plugin checks the clock offset between the local host and a
14* remote NTP server. It is independent of any commandline programs or 14 * remote NTP server. It is independent of any commandline programs or
15* external libraries. 15 * external libraries.
16* 16 *
17* If you'd rather want to monitor an NTP server, please use 17 * If you'd rather want to monitor an NTP server, please use
18* check_ntp_peer. 18 * check_ntp_peer.
19* 19 *
20* 20 *
21* This program is free software: you can redistribute it and/or modify 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 22 * it under the terms of the GNU General Public License as published by
23* the Free Software Foundation, either version 3 of the License, or 23 * the Free Software Foundation, either version 3 of the License, or
24* (at your option) any later version. 24 * (at your option) any later version.
25* 25 *
26* This program is distributed in the hope that it will be useful, 26 * This program is distributed in the hope that it will be useful,
27* but WITHOUT ANY WARRANTY; without even the implied warranty of 27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29* GNU General Public License for more details. 29 * GNU General Public License for more details.
30* 30 *
31* You should have received a copy of the GNU General Public License 31 * You should have received a copy of the GNU General Public License
32* along with this program. If not, see <http://www.gnu.org/licenses/>. 32 * along with this program. If not, see <http://www.gnu.org/licenses/>.
33* 33 *
34* 34 *
35*****************************************************************************/ 35 *****************************************************************************/
36 36
37const char *progname = "check_ntp_time"; 37const char *progname = "check_ntp_time";
38const char *copyright = "2006-2008"; 38const char *copyright = "2006-2024";
39const char *email = "devel@monitoring-plugins.org"; 39const char *email = "devel@monitoring-plugins.org";
40 40
41#include "common.h" 41#include "common.h"
42#include "netutils.h" 42#include "netutils.h"
43#include "utils.h" 43#include "utils.h"
44 44
45static char *server_address=NULL; 45static char *server_address = NULL;
46static char *port="123"; 46static char *port = "123";
47static int verbose=0; 47static int verbose = 0;
48static bool quiet = false; 48static bool quiet = false;
49static char *owarn="60"; 49static char *owarn = "60";
50static char *ocrit="120"; 50static char *ocrit = "120";
51static int time_offset=0; 51static int time_offset = 0;
52 52
53int process_arguments (int, char **); 53static int process_arguments(int, char **);
54thresholds *offset_thresholds = NULL; 54static thresholds *offset_thresholds = NULL;
55void print_help (void); 55static void print_help(void);
56void print_usage (void); 56void print_usage(void);
57 57
58/* number of times to perform each request to get a good average. */ 58/* number of times to perform each request to get a good average. */
59#ifndef AVG_NUM 59#ifndef AVG_NUM
60#define AVG_NUM 4 60# define AVG_NUM 4
61#endif 61#endif
62 62
63/* max size of control message data */ 63/* max size of control message data */
@@ -65,17 +65,17 @@ void print_usage (void);
65 65
66/* this structure holds everything in an ntp request/response as per rfc1305 */ 66/* this structure holds everything in an ntp request/response as per rfc1305 */
67typedef struct { 67typedef struct {
68 uint8_t flags; /* byte with leapindicator,vers,mode. see macros */ 68 uint8_t flags; /* byte with leapindicator,vers,mode. see macros */
69 uint8_t stratum; /* clock stratum */ 69 uint8_t stratum; /* clock stratum */
70 int8_t poll; /* polling interval */ 70 int8_t poll; /* polling interval */
71 int8_t precision; /* precision of the local clock */ 71 int8_t precision; /* precision of the local clock */
72 int32_t rtdelay; /* total rt delay, as a fixed point num. see macros */ 72 int32_t rtdelay; /* total rt delay, as a fixed point num. see macros */
73 uint32_t rtdisp; /* like above, but for max err to primary src */ 73 uint32_t rtdisp; /* like above, but for max err to primary src */
74 uint32_t refid; /* ref clock identifier */ 74 uint32_t refid; /* ref clock identifier */
75 uint64_t refts; /* reference timestamp. local time local clock */ 75 uint64_t refts; /* reference timestamp. local time local clock */
76 uint64_t origts; /* time at which request departed client */ 76 uint64_t origts; /* time at which request departed client */
77 uint64_t rxts; /* time at which request arrived at server */ 77 uint64_t rxts; /* time at which request arrived at server */
78 uint64_t txts; /* time at which request departed server */ 78 uint64_t txts; /* time at which request departed server */
79} ntp_message; 79} ntp_message;
80 80
81/* this structure holds data about results from querying offset from a peer */ 81/* this structure holds data about results from querying offset from a peer */
@@ -86,43 +86,55 @@ typedef struct {
86 double rtdelay; /* converted from the ntp_message */ 86 double rtdelay; /* converted from the ntp_message */
87 double rtdisp; /* converted from the ntp_message */ 87 double rtdisp; /* converted from the ntp_message */
88 double offset[AVG_NUM]; /* offsets from each response */ 88 double offset[AVG_NUM]; /* offsets from each response */
89 uint8_t flags; /* byte with leapindicator,vers,mode. see macros */ 89 uint8_t flags; /* byte with leapindicator,vers,mode. see macros */
90} ntp_server_results; 90} ntp_server_results;
91 91
92/* bits 1,2 are the leap indicator */ 92/* bits 1,2 are the leap indicator */
93#define LI_MASK 0xc0 93#define LI_MASK 0xc0
94#define LI(x) ((x&LI_MASK)>>6) 94#define LI(x) ((x & LI_MASK) >> 6)
95#define LI_SET(x,y) do{ x |= ((y<<6)&LI_MASK); }while(0) 95#define LI_SET(x, y) \
96 do { \
97 x |= ((y << 6) & LI_MASK); \
98 } while (0)
96/* and these are the values of the leap indicator */ 99/* and these are the values of the leap indicator */
97#define LI_NOWARNING 0x00 100#define LI_NOWARNING 0x00
98#define LI_EXTRASEC 0x01 101#define LI_EXTRASEC 0x01
99#define LI_MISSINGSEC 0x02 102#define LI_MISSINGSEC 0x02
100#define LI_ALARM 0x03 103#define LI_ALARM 0x03
101/* bits 3,4,5 are the ntp version */ 104/* bits 3,4,5 are the ntp version */
102#define VN_MASK 0x38 105#define VN_MASK 0x38
103#define VN(x) ((x&VN_MASK)>>3) 106#define VN(x) ((x & VN_MASK) >> 3)
104#define VN_SET(x,y) do{ x |= ((y<<3)&VN_MASK); }while(0) 107#define VN_SET(x, y) \
108 do { \
109 x |= ((y << 3) & VN_MASK); \
110 } while (0)
105#define VN_RESERVED 0x02 111#define VN_RESERVED 0x02
106/* bits 6,7,8 are the ntp mode */ 112/* bits 6,7,8 are the ntp mode */
107#define MODE_MASK 0x07 113#define MODE_MASK 0x07
108#define MODE(x) (x&MODE_MASK) 114#define MODE(x) (x & MODE_MASK)
109#define MODE_SET(x,y) do{ x |= (y&MODE_MASK); }while(0) 115#define MODE_SET(x, y) \
116 do { \
117 x |= (y & MODE_MASK); \
118 } while (0)
110/* here are some values */ 119/* here are some values */
111#define MODE_CLIENT 0x03 120#define MODE_CLIENT 0x03
112#define MODE_CONTROLMSG 0x06 121#define MODE_CONTROLMSG 0x06
113/* In control message, bits 8-10 are R,E,M bits */ 122/* In control message, bits 8-10 are R,E,M bits */
114#define REM_MASK 0xe0 123#define REM_MASK 0xe0
115#define REM_RESP 0x80 124#define REM_RESP 0x80
116#define REM_ERROR 0x40 125#define REM_ERROR 0x40
117#define REM_MORE 0x20 126#define REM_MORE 0x20
118/* In control message, bits 11 - 15 are opcode */ 127/* In control message, bits 11 - 15 are opcode */
119#define OP_MASK 0x1f 128#define OP_MASK 0x1f
120#define OP_SET(x,y) do{ x |= (y&OP_MASK); }while(0) 129#define OP_SET(x, y) \
130 do { \
131 x |= (y & OP_MASK); \
132 } while (0)
121#define OP_READSTAT 0x01 133#define OP_READSTAT 0x01
122#define OP_READVAR 0x02 134#define OP_READVAR 0x02
123/* In peer status bytes, bits 6,7,8 determine clock selection status */ 135/* In peer status bytes, bits 6,7,8 determine clock selection status */
124#define PEER_SEL(x) ((ntohs(x)>>8)&0x07) 136#define PEER_SEL(x) ((ntohs(x) >> 8) & 0x07)
125#define PEER_INCLUDED 0x04 137#define PEER_INCLUDED 0x04
126#define PEER_SYNCSOURCE 0x06 138#define PEER_SYNCSOURCE 0x06
127 139
128/** 140/**
@@ -136,82 +148,91 @@ typedef struct {
136 148
137/* macros to access the left/right 16 bits of a 32-bit ntp "fixed point" 149/* macros to access the left/right 16 bits of a 32-bit ntp "fixed point"
138 number. note that these can be used as lvalues too */ 150 number. note that these can be used as lvalues too */
139#define L16(x) (((uint16_t*)&x)[0]) 151#define L16(x) (((uint16_t *)&x)[0])
140#define R16(x) (((uint16_t*)&x)[1]) 152#define R16(x) (((uint16_t *)&x)[1])
141/* macros to access the left/right 32 bits of a 64-bit ntp "fixed point" 153/* macros to access the left/right 32 bits of a 64-bit ntp "fixed point"
142 number. these too can be used as lvalues */ 154 number. these too can be used as lvalues */
143#define L32(x) (((uint32_t*)&x)[0]) 155#define L32(x) (((uint32_t *)&x)[0])
144#define R32(x) (((uint32_t*)&x)[1]) 156#define R32(x) (((uint32_t *)&x)[1])
145 157
146/* ntp wants seconds since 1/1/00, epoch is 1/1/70. this is the difference */ 158/* ntp wants seconds since 1/1/00, epoch is 1/1/70. this is the difference */
147#define EPOCHDIFF 0x83aa7e80UL 159#define EPOCHDIFF 0x83aa7e80UL
148 160
149/* extract a 32-bit ntp fixed point number into a double */ 161/* extract a 32-bit ntp fixed point number into a double */
150#define NTP32asDOUBLE(x) (ntohs(L16(x)) + (double)ntohs(R16(x))/65536.0) 162#define NTP32asDOUBLE(x) (ntohs(L16(x)) + (double)ntohs(R16(x)) / 65536.0)
151 163
152/* likewise for a 64-bit ntp fp number */ 164/* likewise for a 64-bit ntp fp number */
153#define NTP64asDOUBLE(n) (double)(((uint64_t)n)?\ 165#define NTP64asDOUBLE(n) \
154 (ntohl(L32(n))-EPOCHDIFF) + \ 166 (double)(((uint64_t)n) ? (ntohl(L32(n)) - EPOCHDIFF) + (.00000001 * (0.5 + (double)(ntohl(R32(n)) / 42.94967296))) : 0)
155 (.00000001*(0.5+(double)(ntohl(R32(n))/42.94967296))):\
156 0)
157 167
158/* convert a struct timeval to a double */ 168/* convert a struct timeval to a double */
159#define TVasDOUBLE(x) (double)(x.tv_sec+(0.000001*x.tv_usec)) 169#define TVasDOUBLE(x) (double)(x.tv_sec + (0.000001 * x.tv_usec))
160 170
161/* convert an ntp 64-bit fp number to a struct timeval */ 171/* convert an ntp 64-bit fp number to a struct timeval */
162#define NTP64toTV(n,t) \ 172#define NTP64toTV(n, t) \
163 do{ if(!n) t.tv_sec = t.tv_usec = 0; \ 173 do { \
164 else { \ 174 if (!n) \
165 t.tv_sec=ntohl(L32(n))-EPOCHDIFF; \ 175 t.tv_sec = t.tv_usec = 0; \
166 t.tv_usec=(int)(0.5+(double)(ntohl(R32(n))/4294.967296)); \ 176 else { \
167 } \ 177 t.tv_sec = ntohl(L32(n)) - EPOCHDIFF; \
168 }while(0) 178 t.tv_usec = (int)(0.5 + (double)(ntohl(R32(n)) / 4294.967296)); \
179 } \
180 } while (0)
169 181
170/* convert a struct timeval to an ntp 64-bit fp number */ 182/* convert a struct timeval to an ntp 64-bit fp number */
171#define TVtoNTP64(t,n) \ 183#define TVtoNTP64(t, n) \
172 do{ if(!t.tv_usec && !t.tv_sec) n=0x0UL; \ 184 do { \
173 else { \ 185 if (!t.tv_usec && !t.tv_sec) \
174 L32(n)=htonl(t.tv_sec + EPOCHDIFF); \ 186 n = 0x0UL; \
175 R32(n)=htonl((uint64_t)((4294.967296*t.tv_usec)+.5)); \ 187 else { \
176 } \ 188 L32(n) = htonl(t.tv_sec + EPOCHDIFF); \
177 } while(0) 189 R32(n) = htonl((uint64_t)((4294.967296 * t.tv_usec) + .5)); \
190 } \
191 } while (0)
178 192
179/* NTP control message header is 12 bytes, plus any data in the data 193/* NTP control message header is 12 bytes, plus any data in the data
180 * field, plus null padding to the nearest 32-bit boundary per rfc. 194 * field, plus null padding to the nearest 32-bit boundary per rfc.
181 */ 195 */
182#define SIZEOF_NTPCM(m) (12+ntohs(m.count)+((m.count)?4-(ntohs(m.count)%4):0)) 196#define SIZEOF_NTPCM(m) (12 + ntohs(m.count) + ((m.count) ? 4 - (ntohs(m.count) % 4) : 0))
183 197
184/* finally, a little helper or two for debugging: */ 198/* finally, a little helper or two for debugging: */
185#define DBG(x) do{if(verbose>1){ x; }}while(0); 199#define DBG(x) \
186#define PRINTSOCKADDR(x) \ 200 do { \
187 do{ \ 201 if (verbose > 1) { \
188 printf("%u.%u.%u.%u", (x>>24)&0xff, (x>>16)&0xff, (x>>8)&0xff, x&0xff);\ 202 x; \
189 }while(0); 203 } \
204 } while (0);
205#define PRINTSOCKADDR(x) \
206 do { \
207 printf("%u.%u.%u.%u", (x >> 24) & 0xff, (x >> 16) & 0xff, (x >> 8) & 0xff, x & 0xff); \
208 } while (0);
190 209
191/* calculate the offset of the local clock */ 210/* calculate the offset of the local clock */
192static inline double calc_offset(const ntp_message *m, const struct timeval *t){ 211static inline double calc_offset(const ntp_message *m, const struct timeval *t) {
193 double client_tx, peer_rx, peer_tx, client_rx; 212 double client_tx = NTP64asDOUBLE(m->origts);
194 client_tx = NTP64asDOUBLE(m->origts); 213 double peer_rx = NTP64asDOUBLE(m->rxts);
195 peer_rx = NTP64asDOUBLE(m->rxts); 214 double peer_tx = NTP64asDOUBLE(m->txts);
196 peer_tx = NTP64asDOUBLE(m->txts); 215 double client_rx = TVasDOUBLE((*t));
197 client_rx=TVasDOUBLE((*t)); 216 return (.5 * ((peer_tx - client_rx) + (peer_rx - client_tx)));
198 return (.5*((peer_tx-client_rx)+(peer_rx-client_tx)));
199} 217}
200 218
201/* print out a ntp packet in human readable/debuggable format */ 219/* print out a ntp packet in human readable/debuggable format */
202void print_ntp_message(const ntp_message *p){ 220void print_ntp_message(const ntp_message *p) {
203 struct timeval ref, orig, rx, tx; 221 struct timeval ref;
222 struct timeval orig;
223 struct timeval rx;
224 struct timeval tx;
204 225
205 NTP64toTV(p->refts,ref); 226 NTP64toTV(p->refts, ref);
206 NTP64toTV(p->origts,orig); 227 NTP64toTV(p->origts, orig);
207 NTP64toTV(p->rxts,rx); 228 NTP64toTV(p->rxts, rx);
208 NTP64toTV(p->txts,tx); 229 NTP64toTV(p->txts, tx);
209 230
210 printf("packet contents:\n"); 231 printf("packet contents:\n");
211 printf("\tflags: 0x%.2x\n", p->flags); 232 printf("\tflags: 0x%.2x\n", p->flags);
212 printf("\t li=%d (0x%.2x)\n", LI(p->flags), p->flags&LI_MASK); 233 printf("\t li=%d (0x%.2x)\n", LI(p->flags), p->flags & LI_MASK);
213 printf("\t vn=%d (0x%.2x)\n", VN(p->flags), p->flags&VN_MASK); 234 printf("\t vn=%d (0x%.2x)\n", VN(p->flags), p->flags & VN_MASK);
214 printf("\t mode=%d (0x%.2x)\n", MODE(p->flags), p->flags&MODE_MASK); 235 printf("\t mode=%d (0x%.2x)\n", MODE(p->flags), p->flags & MODE_MASK);
215 printf("\tstratum = %d\n", p->stratum); 236 printf("\tstratum = %d\n", p->stratum);
216 printf("\tpoll = %g\n", pow(2, p->poll)); 237 printf("\tpoll = %g\n", pow(2, p->poll));
217 printf("\tprecision = %g\n", pow(2, p->precision)); 238 printf("\tprecision = %g\n", pow(2, p->precision));
@@ -224,41 +245,42 @@ void print_ntp_message(const ntp_message *p){
224 printf("\ttxts = %-.16g\n", NTP64asDOUBLE(p->txts)); 245 printf("\ttxts = %-.16g\n", NTP64asDOUBLE(p->txts));
225} 246}
226 247
227void setup_request(ntp_message *p){ 248void setup_request(ntp_message *p) {
228 struct timeval t;
229
230 memset(p, 0, sizeof(ntp_message)); 249 memset(p, 0, sizeof(ntp_message));
231 LI_SET(p->flags, LI_ALARM); 250 LI_SET(p->flags, LI_ALARM);
232 VN_SET(p->flags, 4); 251 VN_SET(p->flags, 4);
233 MODE_SET(p->flags, MODE_CLIENT); 252 MODE_SET(p->flags, MODE_CLIENT);
234 p->poll=4; 253 p->poll = 4;
235 p->precision=(int8_t)0xfa; 254 p->precision = (int8_t)0xfa;
236 L16(p->rtdelay)=htons(1); 255 L16(p->rtdelay) = htons(1);
237 L16(p->rtdisp)=htons(1); 256 L16(p->rtdisp) = htons(1);
238 257
258 struct timeval t;
239 gettimeofday(&t, NULL); 259 gettimeofday(&t, NULL);
240 TVtoNTP64(t,p->txts); 260 TVtoNTP64(t, p->txts);
241} 261}
242 262
243/* select the "best" server from a list of servers, and return its index. 263/* select the "best" server from a list of servers, and return its index.
244 * this is done by filtering servers based on stratum, dispersion, and 264 * this is done by filtering servers based on stratum, dispersion, and
245 * finally round-trip delay. */ 265 * finally round-trip delay. */
246int best_offset_server(const ntp_server_results *slist, int nservers){ 266int best_offset_server(const ntp_server_results *slist, int nservers) {
247 int cserver=0, best_server=-1; 267 int best_server = -1;
248 268
249 /* for each server */ 269 /* for each server */
250 for(cserver=0; cserver<nservers; cserver++){ 270 for (int cserver = 0; cserver < nservers; cserver++) {
251 /* We don't want any servers that fails these tests */ 271 /* We don't want any servers that fails these tests */
252 /* Sort out servers that didn't respond or responede with a 0 stratum; 272 /* Sort out servers that didn't respond or responede with a 0 stratum;
253 * stratum 0 is for reference clocks so no NTP server should ever report 273 * stratum 0 is for reference clocks so no NTP server should ever report
254 * a stratum 0 */ 274 * a stratum 0 */
255 if ( slist[cserver].stratum == 0){ 275 if (slist[cserver].stratum == 0) {
256 if (verbose) printf("discarding peer %d: stratum=%d\n", cserver, slist[cserver].stratum); 276 if (verbose)
277 printf("discarding peer %d: stratum=%d\n", cserver, slist[cserver].stratum);
257 continue; 278 continue;
258 } 279 }
259 /* Sort out servers with error flags */ 280 /* Sort out servers with error flags */
260 if ( LI(slist[cserver].flags) == LI_ALARM ){ 281 if (LI(slist[cserver].flags) == LI_ALARM) {
261 if (verbose) printf("discarding peer %d: flags=%d\n", cserver, LI(slist[cserver].flags)); 282 if (verbose)
283 printf("discarding peer %d: flags=%d\n", cserver, LI(slist[cserver].flags));
262 continue; 284 continue;
263 } 285 }
264 286
@@ -272,13 +294,13 @@ int best_offset_server(const ntp_server_results *slist, int nservers){
272 /* compare the server to the best one we've seen so far */ 294 /* compare the server to the best one we've seen so far */
273 /* does it have an equal or better stratum? */ 295 /* does it have an equal or better stratum? */
274 DBG(printf("comparing peer %d with peer %d\n", cserver, best_server)); 296 DBG(printf("comparing peer %d with peer %d\n", cserver, best_server));
275 if(slist[cserver].stratum <= slist[best_server].stratum){ 297 if (slist[cserver].stratum <= slist[best_server].stratum) {
276 DBG(printf("stratum for peer %d <= peer %d\n", cserver, best_server)); 298 DBG(printf("stratum for peer %d <= peer %d\n", cserver, best_server));
277 /* does it have an equal or better dispersion? */ 299 /* does it have an equal or better dispersion? */
278 if(slist[cserver].rtdisp <= slist[best_server].rtdisp){ 300 if (slist[cserver].rtdisp <= slist[best_server].rtdisp) {
279 DBG(printf("dispersion for peer %d <= peer %d\n", cserver, best_server)); 301 DBG(printf("dispersion for peer %d <= peer %d\n", cserver, best_server));
280 /* does it have a better rtdelay? */ 302 /* does it have a better rtdelay? */
281 if(slist[cserver].rtdelay < slist[best_server].rtdelay){ 303 if (slist[cserver].rtdelay < slist[best_server].rtdelay) {
282 DBG(printf("rtdelay for peer %d < peer %d\n", cserver, best_server)); 304 DBG(printf("rtdelay for peer %d < peer %d\n", cserver, best_server));
283 best_server = cserver; 305 best_server = cserver;
284 DBG(printf("peer %d is now our best candidate\n", best_server)); 306 DBG(printf("peer %d is now our best candidate\n", best_server));
@@ -287,13 +309,12 @@ int best_offset_server(const ntp_server_results *slist, int nservers){
287 } 309 }
288 } 310 }
289 311
290 if(best_server >= 0) { 312 if (best_server >= 0) {
291 DBG(printf("best server selected: peer %d\n", best_server)); 313 DBG(printf("best server selected: peer %d\n", best_server));
292 return best_server; 314 return best_server;
293 } else {
294 DBG(printf("no peers meeting synchronization criteria :(\n"));
295 return -1;
296 } 315 }
316 DBG(printf("no peers meeting synchronization criteria :(\n"));
317 return -1;
297} 318}
298 319
299/* do everything we need to get the total average offset 320/* do everything we need to get the total average offset
@@ -301,178 +322,190 @@ int best_offset_server(const ntp_server_results *slist, int nservers){
301 * we don't waste time sitting around waiting for single packets. 322 * we don't waste time sitting around waiting for single packets.
302 * - we also "manually" handle resolving host names and connecting, because 323 * - we also "manually" handle resolving host names and connecting, because
303 * we have to do it in a way that our lazy macros don't handle currently :( */ 324 * we have to do it in a way that our lazy macros don't handle currently :( */
304double offset_request(const char *host, int *status){ 325double offset_request(const char *host, int *status) {
305 int i=0, j=0, ga_result=0, num_hosts=0, *socklist=NULL, respnum=0;
306 int servers_completed=0, one_read=0, servers_readable=0, best_index=-1;
307 time_t now_time=0, start_ts=0;
308 ntp_message *req=NULL;
309 double avg_offset=0.;
310 struct timeval recv_time;
311 struct addrinfo *ai=NULL, *ai_tmp=NULL, hints;
312 struct pollfd *ufds=NULL;
313 ntp_server_results *servers=NULL;
314
315 /* setup hints to only return results from getaddrinfo that we'd like */ 326 /* setup hints to only return results from getaddrinfo that we'd like */
327 struct addrinfo hints;
316 memset(&hints, 0, sizeof(struct addrinfo)); 328 memset(&hints, 0, sizeof(struct addrinfo));
317 hints.ai_family = address_family; 329 hints.ai_family = address_family;
318 hints.ai_protocol = IPPROTO_UDP; 330 hints.ai_protocol = IPPROTO_UDP;
319 hints.ai_socktype = SOCK_DGRAM; 331 hints.ai_socktype = SOCK_DGRAM;
320 332
321 /* fill in ai with the list of hosts resolved by the host name */ 333 /* fill in ai with the list of hosts resolved by the host name */
322 ga_result = getaddrinfo(host, port, &hints, &ai); 334 struct addrinfo *ai = NULL;
323 if(ga_result!=0){ 335 int ga_result = getaddrinfo(host, port, &hints, &ai);
324 die(STATE_UNKNOWN, "error getting address for %s: %s\n", 336 if (ga_result != 0) {
325 host, gai_strerror(ga_result)); 337 die(STATE_UNKNOWN, "error getting address for %s: %s\n", host, gai_strerror(ga_result));
326 } 338 }
327 339
328 /* count the number of returned hosts, and allocate stuff accordingly */ 340 /* count the number of returned hosts, and allocate stuff accordingly */
329 for(ai_tmp=ai; ai_tmp!=NULL; ai_tmp=ai_tmp->ai_next){ num_hosts++; } 341 int num_hosts = 0;
330 req=(ntp_message*)malloc(sizeof(ntp_message)*num_hosts); 342 for (struct addrinfo *ai_tmp = ai; ai_tmp != NULL; ai_tmp = ai_tmp->ai_next) {
331 if(req==NULL) die(STATE_UNKNOWN, "can not allocate ntp message array"); 343 num_hosts++;
332 socklist=(int*)malloc(sizeof(int)*num_hosts); 344 }
333 if(socklist==NULL) die(STATE_UNKNOWN, "can not allocate socket array"); 345
334 ufds=(struct pollfd*)malloc(sizeof(struct pollfd)*num_hosts); 346 ntp_message *req = (ntp_message *)malloc(sizeof(ntp_message) * num_hosts);
335 if(ufds==NULL) die(STATE_UNKNOWN, "can not allocate socket array"); 347
336 servers=(ntp_server_results*)malloc(sizeof(ntp_server_results)*num_hosts); 348 if (req == NULL)
337 if(servers==NULL) die(STATE_UNKNOWN, "can not allocate server array"); 349 die(STATE_UNKNOWN, "can not allocate ntp message array");
338 memset(servers, 0, sizeof(ntp_server_results)*num_hosts); 350 int *socklist = (int *)malloc(sizeof(int) * num_hosts);
351
352 if (socklist == NULL)
353 die(STATE_UNKNOWN, "can not allocate socket array");
354
355 struct pollfd *ufds = (struct pollfd *)malloc(sizeof(struct pollfd) * num_hosts);
356 if (ufds == NULL)
357 die(STATE_UNKNOWN, "can not allocate socket array");
358
359 ntp_server_results *servers = (ntp_server_results *)malloc(sizeof(ntp_server_results) * num_hosts);
360 if (servers == NULL)
361 die(STATE_UNKNOWN, "can not allocate server array");
362 memset(servers, 0, sizeof(ntp_server_results) * num_hosts);
339 DBG(printf("Found %d peers to check\n", num_hosts)); 363 DBG(printf("Found %d peers to check\n", num_hosts));
340 364
341 /* setup each socket for writing, and the corresponding struct pollfd */ 365 /* setup each socket for writing, and the corresponding struct pollfd */
342 ai_tmp=ai; 366 struct addrinfo *ai_tmp = ai;
343 for(i=0;ai_tmp;i++){ 367 for (int i = 0; ai_tmp; i++) {
344 socklist[i]=socket(ai_tmp->ai_family, SOCK_DGRAM, IPPROTO_UDP); 368 socklist[i] = socket(ai_tmp->ai_family, SOCK_DGRAM, IPPROTO_UDP);
345 if(socklist[i] == -1) { 369 if (socklist[i] == -1) {
346 perror(NULL); 370 perror(NULL);
347 die(STATE_UNKNOWN, "can not create new socket"); 371 die(STATE_UNKNOWN, "can not create new socket");
348 } 372 }
349 if(connect(socklist[i], ai_tmp->ai_addr, ai_tmp->ai_addrlen)){ 373 if (connect(socklist[i], ai_tmp->ai_addr, ai_tmp->ai_addrlen)) {
350 /* don't die here, because it is enough if there is one server 374 /* don't die here, because it is enough if there is one server
351 answering in time. This also would break for dual ipv4/6 stacked 375 answering in time. This also would break for dual ipv4/6 stacked
352 ntp servers when the client only supports on of them. 376 ntp servers when the client only supports on of them.
353 */ 377 */
354 DBG(printf("can't create socket connection on peer %i: %s\n", i, strerror(errno))); 378 DBG(printf("can't create socket connection on peer %i: %s\n", i, strerror(errno)));
355 } else { 379 } else {
356 ufds[i].fd=socklist[i]; 380 ufds[i].fd = socklist[i];
357 ufds[i].events=POLLIN; 381 ufds[i].events = POLLIN;
358 ufds[i].revents=0; 382 ufds[i].revents = 0;
359 } 383 }
360 ai_tmp = ai_tmp->ai_next; 384 ai_tmp = ai_tmp->ai_next;
361 } 385 }
362 386
363 /* now do AVG_NUM checks to each host. We stop before timeout/2 seconds 387 /* now do AVG_NUM checks to each host. We stop before timeout/2 seconds
364 * have passed in order to ensure post-processing and jitter time. */ 388 * have passed in order to ensure post-processing and jitter time. */
365 now_time=start_ts=time(NULL); 389 time_t start_ts = 0;
366 while(servers_completed<num_hosts && now_time-start_ts <= socket_timeout/2){ 390 time_t now_time = 0;
391 now_time = start_ts = time(NULL);
392 int servers_completed = 0;
393 bool one_read = false;
394 while (servers_completed < num_hosts && now_time - start_ts <= socket_timeout / 2) {
367 /* loop through each server and find each one which hasn't 395 /* loop through each server and find each one which hasn't
368 * been touched in the past second or so and is still lacking 396 * been touched in the past second or so and is still lacking
369 * some responses. For each of these servers, send a new request, 397 * some responses. For each of these servers, send a new request,
370 * and update the "waiting" timestamp with the current time. */ 398 * and update the "waiting" timestamp with the current time. */
371 now_time=time(NULL); 399 now_time = time(NULL);
372 400
373 for(i=0; i<num_hosts; i++){ 401 for (int i = 0; i < num_hosts; i++) {
374 if(servers[i].waiting<now_time && servers[i].num_responses<AVG_NUM){ 402 if (servers[i].waiting < now_time && servers[i].num_responses < AVG_NUM) {
375 if(verbose && servers[i].waiting != 0) printf("re-"); 403 if (verbose && servers[i].waiting != 0)
376 if(verbose) printf("sending request to peer %d\n", i); 404 printf("re-");
405 if (verbose)
406 printf("sending request to peer %d\n", i);
377 setup_request(&req[i]); 407 setup_request(&req[i]);
378 write(socklist[i], &req[i], sizeof(ntp_message)); 408 write(socklist[i], &req[i], sizeof(ntp_message));
379 servers[i].waiting=now_time; 409 servers[i].waiting = now_time;
380 break; 410 break;
381 } 411 }
382 } 412 }
383 413
384 /* quickly poll for any sockets with pending data */ 414 /* quickly poll for any sockets with pending data */
385 servers_readable=poll(ufds, num_hosts, 100); 415 int servers_readable = poll(ufds, num_hosts, 100);
386 if(servers_readable==-1){ 416 if (servers_readable == -1) {
387 perror("polling ntp sockets"); 417 perror("polling ntp sockets");
388 die(STATE_UNKNOWN, "communication errors"); 418 die(STATE_UNKNOWN, "communication errors");
389 } 419 }
390 420
391 /* read from any sockets with pending data */ 421 /* read from any sockets with pending data */
392 for(i=0; servers_readable && i<num_hosts; i++){ 422 for (int i = 0; servers_readable && i < num_hosts; i++) {
393 if(ufds[i].revents&POLLIN && servers[i].num_responses < AVG_NUM){ 423 if (ufds[i].revents & POLLIN && servers[i].num_responses < AVG_NUM) {
394 if(verbose) { 424 if (verbose) {
395 printf("response from peer %d: ", i); 425 printf("response from peer %d: ", i);
396 } 426 }
397 427
398 read(ufds[i].fd, &req[i], sizeof(ntp_message)); 428 read(ufds[i].fd, &req[i], sizeof(ntp_message));
429
430 struct timeval recv_time;
399 gettimeofday(&recv_time, NULL); 431 gettimeofday(&recv_time, NULL);
400 DBG(print_ntp_message(&req[i])); 432 DBG(print_ntp_message(&req[i]));
401 respnum=servers[i].num_responses++; 433 int respnum = servers[i].num_responses++;
402 servers[i].offset[respnum]=calc_offset(&req[i], &recv_time)+time_offset; 434 servers[i].offset[respnum] = calc_offset(&req[i], &recv_time) + time_offset;
403 if(verbose) { 435 if (verbose) {
404 printf("offset %.10g\n", servers[i].offset[respnum]); 436 printf("offset %.10g\n", servers[i].offset[respnum]);
405 } 437 }
406 servers[i].stratum=req[i].stratum; 438 servers[i].stratum = req[i].stratum;
407 servers[i].rtdisp=NTP32asDOUBLE(req[i].rtdisp); 439 servers[i].rtdisp = NTP32asDOUBLE(req[i].rtdisp);
408 servers[i].rtdelay=NTP32asDOUBLE(req[i].rtdelay); 440 servers[i].rtdelay = NTP32asDOUBLE(req[i].rtdelay);
409 servers[i].waiting=0; 441 servers[i].waiting = 0;
410 servers[i].flags=req[i].flags; 442 servers[i].flags = req[i].flags;
411 servers_readable--; 443 servers_readable--;
412 one_read = 1; 444 one_read = true;
413 if(servers[i].num_responses==AVG_NUM) servers_completed++; 445 if (servers[i].num_responses == AVG_NUM)
446 servers_completed++;
414 } 447 }
415 } 448 }
416 /* lather, rinse, repeat. */ 449 /* lather, rinse, repeat. */
417 } 450 }
418 451
419 if (one_read == 0) { 452 if (one_read == false) {
420 die(STATE_CRITICAL, "NTP CRITICAL: No response from NTP server\n"); 453 die(STATE_CRITICAL, "NTP CRITICAL: No response from NTP server\n");
421 } 454 }
422 455
423 /* now, pick the best server from the list */ 456 /* now, pick the best server from the list */
424 best_index=best_offset_server(servers, num_hosts); 457 double avg_offset = 0.;
425 if(best_index < 0){ 458 int best_index = best_offset_server(servers, num_hosts);
426 *status=STATE_UNKNOWN; 459 if (best_index < 0) {
460 *status = STATE_UNKNOWN;
427 } else { 461 } else {
428 /* finally, calculate the average offset */ 462 /* finally, calculate the average offset */
429 for(i=0; i<servers[best_index].num_responses;i++){ 463 for (int i = 0; i < servers[best_index].num_responses; i++) {
430 avg_offset+=servers[best_index].offset[i]; 464 avg_offset += servers[best_index].offset[i];
431 } 465 }
432 avg_offset/=servers[best_index].num_responses; 466 avg_offset /= servers[best_index].num_responses;
433 } 467 }
434 468
435 /* cleanup */ 469 /* cleanup */
436 for(j=0; j<num_hosts; j++){ close(socklist[j]); } 470 for (int j = 0; j < num_hosts; j++) {
471 close(socklist[j]);
472 }
437 free(socklist); 473 free(socklist);
438 free(ufds); 474 free(ufds);
439 free(servers); 475 free(servers);
440 free(req); 476 free(req);
441 freeaddrinfo(ai); 477 freeaddrinfo(ai);
442 478
443 if(verbose) printf("overall average offset: %.10g\n", avg_offset); 479 if (verbose)
480 printf("overall average offset: %.10g\n", avg_offset);
444 return avg_offset; 481 return avg_offset;
445} 482}
446 483
447int process_arguments(int argc, char **argv){ 484int process_arguments(int argc, char **argv) {
448 int c; 485 static struct option longopts[] = {{"version", no_argument, 0, 'V'},
449 int option=0; 486 {"help", no_argument, 0, 'h'},
450 static struct option longopts[] = { 487 {"verbose", no_argument, 0, 'v'},
451 {"version", no_argument, 0, 'V'}, 488 {"use-ipv4", no_argument, 0, '4'},
452 {"help", no_argument, 0, 'h'}, 489 {"use-ipv6", no_argument, 0, '6'},
453 {"verbose", no_argument, 0, 'v'}, 490 {"quiet", no_argument, 0, 'q'},
454 {"use-ipv4", no_argument, 0, '4'}, 491 {"time-offset", optional_argument, 0, 'o'},
455 {"use-ipv6", no_argument, 0, '6'}, 492 {"warning", required_argument, 0, 'w'},
456 {"quiet", no_argument, 0, 'q'}, 493 {"critical", required_argument, 0, 'c'},
457 {"time-offset", optional_argument, 0, 'o'}, 494 {"timeout", required_argument, 0, 't'},
458 {"warning", required_argument, 0, 'w'}, 495 {"hostname", required_argument, 0, 'H'},
459 {"critical", required_argument, 0, 'c'}, 496 {"port", required_argument, 0, 'p'},
460 {"timeout", required_argument, 0, 't'}, 497 {0, 0, 0, 0}};
461 {"hostname", required_argument, 0, 'H'},
462 {"port", required_argument, 0, 'p'},
463 {0, 0, 0, 0}
464 };
465
466 498
467 if (argc < 2) 499 if (argc < 2)
468 usage ("\n"); 500 usage("\n");
469 501
470 while (1) { 502 while (true) {
471 c = getopt_long (argc, argv, "Vhv46qw:c:t:H:p:o:", longopts, &option); 503 int option = 0;
472 if (c == -1 || c == EOF || c == 1) 504 int option_char = getopt_long(argc, argv, "Vhv46qw:c:t:H:p:o:", longopts, &option);
505 if (option_char == -1 || option_char == EOF || option_char == 1)
473 break; 506 break;
474 507
475 switch (c) { 508 switch (option_char) {
476 case 'h': 509 case 'h':
477 print_help(); 510 print_help();
478 exit(STATE_UNKNOWN); 511 exit(STATE_UNKNOWN);
@@ -494,7 +527,7 @@ int process_arguments(int argc, char **argv){
494 ocrit = optarg; 527 ocrit = optarg;
495 break; 528 break;
496 case 'H': 529 case 'H':
497 if(!is_host(optarg)) 530 if (!is_host(optarg))
498 usage2(_("Invalid hostname/address"), optarg); 531 usage2(_("Invalid hostname/address"), optarg);
499 server_address = strdup(optarg); 532 server_address = strdup(optarg);
500 break; 533 break;
@@ -502,11 +535,11 @@ int process_arguments(int argc, char **argv){
502 port = strdup(optarg); 535 port = strdup(optarg);
503 break; 536 break;
504 case 't': 537 case 't':
505 socket_timeout=atoi(optarg); 538 socket_timeout = atoi(optarg);
506 break; 539 break;
507 case 'o': 540 case 'o':
508 time_offset=atoi(optarg); 541 time_offset = atoi(optarg);
509 break; 542 break;
510 case '4': 543 case '4':
511 address_family = AF_INET; 544 address_family = AF_INET;
512 break; 545 break;
@@ -514,77 +547,74 @@ int process_arguments(int argc, char **argv){
514#ifdef USE_IPV6 547#ifdef USE_IPV6
515 address_family = AF_INET6; 548 address_family = AF_INET6;
516#else 549#else
517 usage4 (_("IPv6 support not available")); 550 usage4(_("IPv6 support not available"));
518#endif 551#endif
519 break; 552 break;
520 case '?': 553 case '?':
521 /* print short usage statement if args not parsable */ 554 /* print short usage statement if args not parsable */
522 usage5 (); 555 usage5();
523 break; 556 break;
524 } 557 }
525 } 558 }
526 559
527 if(server_address == NULL){ 560 if (server_address == NULL) {
528 usage4(_("Hostname was not supplied")); 561 usage4(_("Hostname was not supplied"));
529 } 562 }
530 563
531 return 0; 564 return 0;
532} 565}
533 566
534char *perfd_offset (double offset) { 567char *perfd_offset(double offset) {
535 return fperfdata ("offset", offset, "s", 568 return fperfdata("offset", offset, "s", true, offset_thresholds->warning->end, true, offset_thresholds->critical->end, false, 0, false,
536 true, offset_thresholds->warning->end, 569 0);
537 true, offset_thresholds->critical->end,
538 false, 0, false, 0);
539} 570}
540 571
541int main(int argc, char *argv[]){ 572int main(int argc, char *argv[]) {
542 int result, offset_result; 573 setlocale(LC_ALL, "");
543 double offset=0; 574 bindtextdomain(PACKAGE, LOCALEDIR);
544 char *result_line, *perfdata_line; 575 textdomain(PACKAGE);
545
546 setlocale (LC_ALL, "");
547 bindtextdomain (PACKAGE, LOCALEDIR);
548 textdomain (PACKAGE);
549
550 result = offset_result = STATE_OK;
551 576
552 /* Parse extra opts if any */ 577 /* Parse extra opts if any */
553 argv=np_extra_opts (&argc, argv, progname); 578 argv = np_extra_opts(&argc, argv, progname);
554 579
555 if (process_arguments (argc, argv) == ERROR) 580 if (process_arguments(argc, argv) == ERROR)
556 usage4 (_("Could not parse arguments")); 581 usage4(_("Could not parse arguments"));
557 582
558 set_thresholds(&offset_thresholds, owarn, ocrit); 583 set_thresholds(&offset_thresholds, owarn, ocrit);
559 584
560 /* initialize alarm signal handling */ 585 /* initialize alarm signal handling */
561 signal (SIGALRM, socket_timeout_alarm_handler); 586 signal(SIGALRM, socket_timeout_alarm_handler);
562 587
563 /* set socket timeout */ 588 /* set socket timeout */
564 alarm (socket_timeout); 589 alarm(socket_timeout);
565 590
566 offset = offset_request(server_address, &offset_result); 591 int offset_result = STATE_OK;
592 int result = STATE_OK;
593 double offset = offset_request(server_address, &offset_result);
567 if (offset_result == STATE_UNKNOWN) { 594 if (offset_result == STATE_UNKNOWN) {
568 result = ( (!quiet) ? STATE_UNKNOWN : STATE_CRITICAL); 595 result = ((!quiet) ? STATE_UNKNOWN : STATE_CRITICAL);
569 } else { 596 } else {
570 result = get_status(fabs(offset), offset_thresholds); 597 result = get_status(fabs(offset), offset_thresholds);
571 } 598 }
572 599
600 char *result_line;
573 switch (result) { 601 switch (result) {
574 case STATE_CRITICAL : 602 case STATE_CRITICAL:
575 xasprintf(&result_line, _("NTP CRITICAL:")); 603 xasprintf(&result_line, _("NTP CRITICAL:"));
576 break; 604 break;
577 case STATE_WARNING : 605 case STATE_WARNING:
578 xasprintf(&result_line, _("NTP WARNING:")); 606 xasprintf(&result_line, _("NTP WARNING:"));
579 break; 607 break;
580 case STATE_OK : 608 case STATE_OK:
581 xasprintf(&result_line, _("NTP OK:")); 609 xasprintf(&result_line, _("NTP OK:"));
582 break; 610 break;
583 default : 611 default:
584 xasprintf(&result_line, _("NTP UNKNOWN:")); 612 xasprintf(&result_line, _("NTP UNKNOWN:"));
585 break; 613 break;
586 } 614 }
587 if(offset_result == STATE_UNKNOWN){ 615
616 char *perfdata_line;
617 if (offset_result == STATE_UNKNOWN) {
588 xasprintf(&result_line, "%s %s", result_line, _("Offset unknown")); 618 xasprintf(&result_line, "%s %s", result_line, _("Offset unknown"));
589 xasprintf(&perfdata_line, ""); 619 xasprintf(&perfdata_line, "");
590 } else { 620 } else {
@@ -593,35 +623,36 @@ int main(int argc, char *argv[]){
593 } 623 }
594 printf("%s|%s\n", result_line, perfdata_line); 624 printf("%s|%s\n", result_line, perfdata_line);
595 625
596 if(server_address!=NULL) free(server_address); 626 if (server_address != NULL)
627 free(server_address);
597 return result; 628 return result;
598} 629}
599 630
600void print_help(void){ 631void print_help(void) {
601 print_revision(progname, NP_VERSION); 632 print_revision(progname, NP_VERSION);
602 633
603 printf ("Copyright (c) 2006 Sean Finney\n"); 634 printf("Copyright (c) 2006 Sean Finney\n");
604 printf (COPYRIGHT, copyright, email); 635 printf(COPYRIGHT, copyright, email);
605 636
606 printf ("%s\n", _("This plugin checks the clock offset with the ntp server")); 637 printf("%s\n", _("This plugin checks the clock offset with the ntp server"));
607 638
608 printf ("\n\n"); 639 printf("\n\n");
609 640
610 print_usage(); 641 print_usage();
611 printf (UT_HELP_VRSN); 642 printf(UT_HELP_VRSN);
612 printf (UT_EXTRA_OPTS); 643 printf(UT_EXTRA_OPTS);
613 printf (UT_IPv46); 644 printf(UT_IPv46);
614 printf (UT_HOST_PORT, 'p', "123"); 645 printf(UT_HOST_PORT, 'p', "123");
615 printf (" %s\n", "-q, --quiet"); 646 printf(" %s\n", "-q, --quiet");
616 printf (" %s\n", _("Returns UNKNOWN instead of CRITICAL if offset cannot be found")); 647 printf(" %s\n", _("Returns UNKNOWN instead of CRITICAL if offset cannot be found"));
617 printf (" %s\n", "-w, --warning=THRESHOLD"); 648 printf(" %s\n", "-w, --warning=THRESHOLD");
618 printf (" %s\n", _("Offset to result in warning status (seconds)")); 649 printf(" %s\n", _("Offset to result in warning status (seconds)"));
619 printf (" %s\n", "-c, --critical=THRESHOLD"); 650 printf(" %s\n", "-c, --critical=THRESHOLD");
620 printf (" %s\n", _("Offset to result in critical status (seconds)")); 651 printf(" %s\n", _("Offset to result in critical status (seconds)"));
621 printf (" %s\n", "-o, --time_offset=INTEGER"); 652 printf(" %s\n", "-o, --time_offset=INTEGER");
622 printf (" %s\n", _("Expected offset of the ntp server relative to local server (seconds)")); 653 printf(" %s\n", _("Expected offset of the ntp server relative to local server (seconds)"));
623 printf (UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT); 654 printf(UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
624 printf (UT_VERBOSE); 655 printf(UT_VERBOSE);
625 656
626 printf("\n"); 657 printf("\n");
627 printf("%s\n", _("This plugin checks the clock offset between the local host and a")); 658 printf("%s\n", _("This plugin checks the clock offset between the local host and a"));
@@ -641,13 +672,10 @@ void print_help(void){
641 printf("%s\n", _("Examples:")); 672 printf("%s\n", _("Examples:"));
642 printf(" %s\n", ("./check_ntp_time -H ntpserv -w 0.5 -c 1")); 673 printf(" %s\n", ("./check_ntp_time -H ntpserv -w 0.5 -c 1"));
643 674
644 printf (UT_SUPPORT); 675 printf(UT_SUPPORT);
645} 676}
646 677
647void 678void print_usage(void) {
648print_usage(void) 679 printf("%s\n", _("Usage:"));
649{
650 printf ("%s\n", _("Usage:"));
651 printf(" %s -H <host> [-4|-6] [-w <warn>] [-c <crit>] [-v verbose] [-o <time offset>]\n", progname); 680 printf(" %s -H <host> [-4|-6] [-w <warn>] [-c <crit>] [-v verbose] [-o <time offset>]\n", progname);
652} 681}
653