ntptime.c revision 132451 
1/*
2 * NTP test program
3 *
4 * This program tests to see if the NTP user interface routines
5 * ntp_gettime() and ntp_adjtime() have been implemented in the kernel.
6 * If so, each of these routines is called to display current timekeeping
7 * data.
8 *
9 * For more information, see the README.kern file in the doc directory
10 * of the xntp3 distribution.
11 */
12
13#ifdef HAVE_CONFIG_H
14# include <config.h>
15#endif /* HAVE_CONFIG_H */
16
17#include "ntp_fp.h"
18#include "ntp_unixtime.h"
19#include "ntp_syscall.h"
20#include "ntp_stdlib.h"
21
22#include <stdio.h>
23#include <ctype.h>
24#include <signal.h>
25#include <setjmp.h>
26
27#ifdef NTP_SYSCALLS_STD
28# ifndef SYS_DECOSF1
29#  define BADCALL -1		/* this is supposed to be a bad syscall */
30# endif /* SYS_DECOSF1 */
31#endif
32
33#ifdef HAVE_STRUCT_NTPTIMEVAL_TIME_TV_NSEC
34#define tv_frac_sec tv_nsec
35#else
36#define tv_frac_sec tv_usec
37#endif
38
39
40#define TIMEX_MOD_BITS \
41"\20\1OFFSET\2FREQUENCY\3MAXERROR\4ESTERROR\5STATUS\6TIMECONST\
42\13PLL\14FLL\15MICRO\16NANO\17CLKB\20CLKA"
43
44#define TIMEX_STA_BITS \
45"\20\1PLL\2PPSFREQ\3PPSTIME\4FLL\5INS\6DEL\7UNSYNC\10FREQHOLD\
46\11PPSSIGNAL\12PPSJITTER\13PPSWANDER\14PPSERROR\15CLOCKERR\
47\16NANO\17MODE\20CLK"
48
49#define SCALE_FREQ 65536		/* frequency scale */
50
51
52/*
53 * Function prototypes
54 */
55char *sprintb		P((u_int, const char *));
56const char *timex_state	P((int));
57
58#ifdef SIGSYS
59void pll_trap		P((int));
60
61static struct sigaction newsigsys;	/* new sigaction status */
62static struct sigaction sigsys;		/* current sigaction status */
63static sigjmp_buf env;		/* environment var. for pll_trap() */
64#endif
65
66static volatile int pll_control; /* (0) daemon, (1) kernel loop */
67static volatile int status;	/* most recent status bits */
68static volatile int flash;	/* most recent ntp_adjtime() bits */
69char* progname;
70static char optargs[] = "MNT:cde:f:hm:o:rs:t:";
71
72int
73main(
74	int argc,
75	char *argv[]
76	)
77{
78	extern int ntp_optind;
79	extern char *ntp_optarg;
80#ifdef SUBST_ADJTIMEX
81      struct timex ntv;
82#else
83	struct ntptimeval ntv;
84#endif
85	struct timeval tv;
86	struct timex ntx, _ntx;
87	int	times[20];
88	double ftemp, gtemp, htemp;
89	long time_frac;				/* ntv.time.tv_frac_sec (us/ns) */
90	l_fp ts;
91	volatile unsigned ts_mask = TS_MASK;		/* defaults to 20 bits (us) */
92	volatile unsigned ts_roundbit = TS_ROUNDBIT;	/* defaults to 20 bits (us) */
93	volatile int fdigits = 6;			/* fractional digits for us */
94	int c;
95	int errflg	= 0;
96	int cost	= 0;
97	volatile int rawtime	= 0;
98
99	memset((char *)&ntx, 0, sizeof(ntx));
100	progname = argv[0];
101	while ((c = ntp_getopt(argc, argv, optargs)) != EOF) switch (c) {
102#ifdef MOD_MICRO
103	    case 'M':
104		ntx.modes |= MOD_MICRO;
105		break;
106#endif
107#ifdef MOD_NANO
108	    case 'N':
109		ntx.modes |= MOD_NANO;
110		break;
111#endif
112#ifdef NTP_API
113# if NTP_API > 3
114	    case 'T':
115		ntx.modes = MOD_TAI;
116		ntx.constant = atoi(ntp_optarg);
117		break;
118# endif
119#endif
120	    case 'c':
121		cost++;
122		break;
123	    case 'e':
124		ntx.modes |= MOD_ESTERROR;
125		ntx.esterror = atoi(ntp_optarg);
126		break;
127	    case 'f':
128		ntx.modes |= MOD_FREQUENCY;
129		ntx.freq = (long)(atof(ntp_optarg) * SCALE_FREQ);
130		break;
131	    case 'm':
132		ntx.modes |= MOD_MAXERROR;
133		ntx.maxerror = atoi(ntp_optarg);
134		break;
135	    case 'o':
136		ntx.modes |= MOD_OFFSET;
137		ntx.offset = atoi(ntp_optarg);
138		break;
139	    case 'r':
140		rawtime++;
141		break;
142	    case 's':
143		ntx.modes |= MOD_STATUS;
144		ntx.status = atoi(ntp_optarg);
145		if (ntx.status < 0 || ntx.status >= 0x100) errflg++;
146		break;
147	    case 't':
148		ntx.modes |= MOD_TIMECONST;
149		ntx.constant = atoi(ntp_optarg);
150		break;
151	    default:
152		errflg++;
153	}
154	if (errflg || (ntp_optind != argc)) {
155		(void) fprintf(stderr,
156			       "usage: %s [-%s]\n\n\
157%s%s%s\
158-c		display the time taken to call ntp_gettime (us)\n\
159-e esterror	estimate of the error (us)\n\
160-f frequency	Frequency error (-500 .. 500) (ppm)\n\
161-h		display this help info\n\
162-m maxerror	max possible error (us)\n\
163-o offset	current offset (ms)\n\
164-r		print the unix and NTP time raw\n\
165-s status	Set the status bits\n\
166-t timeconstant	log2 of PLL time constant (0 .. %d)\n",
167			       progname, optargs,
168#ifdef MOD_MICRO
169"-M		switch to microsecond mode\n",
170#else
171"",
172#endif
173#ifdef MOD_NANO
174"-N		switch to nanosecond mode\n",
175#else
176"",
177#endif
178#ifdef NTP_API
179# if NTP_API > 3
180"-T tai_offset	set TAI offset\n",
181# else
182"",
183# endif
184#else
185"",
186#endif
187			       MAXTC);
188		exit(2);
189	}
190
191#ifdef SIGSYS
192	/*
193	 * Test to make sure the sigaction() works in case of invalid
194	 * syscall codes.
195	 */
196	newsigsys.sa_handler = pll_trap;
197	newsigsys.sa_flags = 0;
198	if (sigaction(SIGSYS, &newsigsys, &sigsys)) {
199		perror("sigaction() fails to save SIGSYS trap");
200		exit(1);
201	}
202#endif /* SIGSYS */
203
204#ifdef	BADCALL
205	/*
206	 * Make sure the trapcatcher works.
207	 */
208	pll_control = 1;
209#ifdef SIGSYS
210	if (sigsetjmp(env, 1) == 0)
211	{
212#endif
213		status = syscall(BADCALL, &ntv); /* dummy parameter */
214		if ((status < 0) && (errno == ENOSYS))
215			--pll_control;
216#ifdef SIGSYS
217	}
218#endif
219	if (pll_control)
220	    printf("sigaction() failed to catch an invalid syscall\n");
221#endif /* BADCALL */
222
223	if (cost) {
224#ifdef SIGSYS
225		if (sigsetjmp(env, 1) == 0) {
226#endif
227			for (c = 0; c < sizeof times / sizeof times[0]; c++) {
228				status = ntp_gettime(&ntv);
229				if ((status < 0) && (errno == ENOSYS))
230					--pll_control;
231				if (pll_control < 0)
232					break;
233				times[c] = ntv.time.tv_frac_sec;
234			}
235#ifdef SIGSYS
236		}
237#endif
238		if (pll_control >= 0) {
239			printf("[ us %06d:", times[0]);
240			for (c = 1; c < sizeof times / sizeof times[0]; c++)
241			    printf(" %d", times[c] - times[c - 1]);
242			printf(" ]\n");
243		}
244	}
245#ifdef SIGSYS
246	if (sigsetjmp(env, 1) == 0) {
247#endif
248		status = ntp_gettime(&ntv);
249		if ((status < 0) && (errno == ENOSYS))
250			--pll_control;
251#ifdef SIGSYS
252	}
253#endif
254	_ntx.modes = 0;				/* Ensure nothing is set */
255#ifdef SIGSYS
256	if (sigsetjmp(env, 1) == 0) {
257#endif
258		status = ntp_adjtime(&_ntx);
259		if ((status < 0) && (errno == ENOSYS))
260			--pll_control;
261		flash = _ntx.status;
262#ifdef SIGSYS
263	}
264#endif
265	if (pll_control < 0) {
266		printf("NTP user interface routines are not configured in this kernel.\n");
267		goto lexit;
268	}
269
270	/*
271	 * Fetch timekeeping data and display.
272	 */
273	status = ntp_gettime(&ntv);
274	if (status < 0)
275		perror("ntp_gettime() call fails");
276	else {
277		printf("ntp_gettime() returns code %d (%s)\n",
278		    status, timex_state(status));
279		time_frac = ntv.time.tv_frac_sec;
280#ifdef STA_NANO
281		if (flash & STA_NANO) {
282			ntv.time.tv_frac_sec /= 1000;
283			ts_mask = 0xfffffffc;	/* 1/2^30 */
284			ts_roundbit = 0x00000002;
285			fdigits = 9;
286		}
287#endif
288		tv.tv_sec = ntv.time.tv_sec;
289		tv.tv_usec = ntv.time.tv_frac_sec;
290		TVTOTS(&tv, &ts);
291		ts.l_ui += JAN_1970;
292		ts.l_uf += ts_roundbit;
293		ts.l_uf &= ts_mask;
294		printf("  time %s, (.%0*d),\n",
295		       prettydate(&ts), fdigits, (int) time_frac);
296		printf("  maximum error %lu us, estimated error %lu us",
297		       (u_long)ntv.maxerror, (u_long)ntv.esterror);
298		if (rawtime)
299		    printf("  ntptime=%x.%x unixtime=%x.%0*d %s",
300		    (unsigned int) ts.l_ui, (unsigned int) ts.l_uf,
301		    (int) ntv.time.tv_sec, fdigits, (int) time_frac,
302		    ctime((const time_t *) &ntv.time.tv_sec));
303#if NTP_API > 3
304		printf(", TAI offset %ld\n", (long)ntv.tai);
305#else
306		printf("\n");
307#endif /* NTP_API */
308	}
309	status = ntp_adjtime(&ntx);
310	if (status < 0)
311		perror((errno == EPERM) ?
312		   "Must be root to set kernel values\nntp_adjtime() call fails" :
313		   "ntp_adjtime() call fails");
314	else {
315		flash = ntx.status;
316		printf("ntp_adjtime() returns code %d (%s)\n",
317		     status, timex_state(status));
318		printf("  modes %s,\n", sprintb(ntx.modes, TIMEX_MOD_BITS));
319		ftemp = (double)ntx.offset;
320#ifdef STA_NANO
321		if (flash & STA_NANO)
322			ftemp /= 1000.0;
323#endif
324		printf("  offset %.3f", ftemp);
325		ftemp = (double)ntx.freq / SCALE_FREQ;
326		printf(" us, frequency %.3f ppm, interval %d s,\n",
327		     ftemp, 1 << ntx.shift);
328		printf("  maximum error %lu us, estimated error %lu us,\n",
329		     (u_long)ntx.maxerror, (u_long)ntx.esterror);
330		printf("  status %s,\n", sprintb((u_int)ntx.status, TIMEX_STA_BITS));
331		ftemp = (double)ntx.tolerance / SCALE_FREQ;
332		gtemp = (double)ntx.precision;
333#ifdef STA_NANO
334		if (flash & STA_NANO)
335			gtemp /= 1000.0;
336#endif
337		printf(
338		    "  time constant %lu, precision %.3f us, tolerance %.0f ppm,\n",
339		    (u_long)ntx.constant, gtemp, ftemp);
340		if (ntx.shift == 0)
341			exit (0);
342		ftemp = (double)ntx.ppsfreq / SCALE_FREQ;
343		gtemp = (double)ntx.stabil / SCALE_FREQ;
344		htemp = (double)ntx.jitter;
345#ifdef STA_NANO
346		if (flash & STA_NANO)
347			htemp /= 1000.0;
348#endif
349		printf(
350		    "  pps frequency %.3f ppm, stability %.3f ppm, jitter %.3f us,\n",
351		    ftemp, gtemp, htemp);
352		printf("  intervals %lu, jitter exceeded %lu, stability exceeded %lu, errors %lu.\n",
353		    (u_long)ntx.calcnt, (u_long)ntx.jitcnt,
354		    (u_long)ntx.stbcnt, (u_long)ntx.errcnt);
355		return (0);
356	}
357
358	/*
359	 * Put things back together the way we found them.
360	 */
361    lexit:
362#ifdef SIGSYS
363	if (sigaction(SIGSYS, &sigsys, (struct sigaction *)NULL)) {
364		perror("sigaction() fails to restore SIGSYS trap");
365		exit(1);
366	}
367#endif
368	exit(0);
369}
370
371#ifdef SIGSYS
372/*
373 * pll_trap - trap processor for undefined syscalls
374 */
375void
376pll_trap(
377	int arg
378	)
379{
380	pll_control--;
381	siglongjmp(env, 1);
382}
383#endif
384
385/*
386 * Print a value a la the %b format of the kernel's printf
387 */
388char *
389sprintb(
390	register u_int v,
391	register const char *bits
392	)
393{
394	register char *cp;
395	register int i, any = 0;
396	register char c;
397	static char buf[132];
398
399	if (bits && *bits == 8)
400	    (void)sprintf(buf, "0%o", v);
401	else
402	    (void)sprintf(buf, "0x%x", v);
403	cp = buf + strlen(buf);
404	bits++;
405	if (bits) {
406		*cp++ = ' ';
407		*cp++ = '(';
408		while ((i = *bits++) != 0) {
409			if (v & (1 << (i-1))) {
410				if (any)
411				    *cp++ = ',';
412				any = 1;
413				for (; (c = *bits) > 32; bits++)
414				    *cp++ = c;
415			} else
416			    for (; *bits > 32; bits++)
417				continue;
418		}
419		*cp++ = ')';
420	}
421	*cp = '\0';
422	return (buf);
423}
424
425const char *timex_states[] = {
426	"OK", "INS", "DEL", "OOP", "WAIT", "ERROR"
427};
428
429const char *
430timex_state(
431	register int s
432	)
433{
434	static char buf[32];
435
436	if (s >= 0 && s <= sizeof(timex_states) / sizeof(timex_states[0]))
437	    return (timex_states[s]);
438	sprintf(buf, "TIME-#%d", s);
439	return (buf);
440}
441