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/*
* NTP test program
*
* This program tests to see if the NTP user interface routines
* ntp_gettime() and ntp_adjtime() have been implemented in the kernel.
* If so, each of these routines is called to display current timekeeping
* data.
*
* For more information, see the README.kern file in the doc directory
* of the xntp3 distribution.
*/
#include <stdio.h>
#include <ctype.h>
#include <sys/time.h>
#include <signal.h>
#include <errno.h>
#include "ntp_fp.h"
#include "ntp_unixtime.h"
#include "sys/timex.h"
#include "ntp_stdlib.h"
#ifndef SYS_DECOSF1
#define BADCALL -1 /* this is supposed to be a bad syscall */
#endif /* SYS_DECOSF1 */
#ifdef KERNEL_PLL
#define ntp_gettime(t) syscall(SYS_ntp_gettime, (t))
#define ntp_adjtime(t) syscall(SYS_ntp_adjtime, (t))
#else /* KERNEL_PLL */
#define SYS_ntp_adjtime NTP_SYSCALL_ADJ
#define SYS_ntp_gettime NTP_SYSCALL_GET
#endif /* KERNEL_PLL */
/*
* Function prototypes
*/
extern int sigvec P((int, struct sigvec *, struct sigvec *));
extern int syscall P((int, void *, ...));
void pll_trap P((void));
static struct sigvec newsigsys; /* new sigvec status */
static struct sigvec sigsys; /* current sigvec status */
static int pll_control; /* (0) daemon, (1) kernel loop */
static char* progname;
static char optargs[] = "ce:f:hm:o:rs:t:";
void
main(argc, argv)
int argc;
char *argv[];
{
extern int ntp_optind;
extern char *ntp_optarg;
int status;
struct ntptimeval ntv;
struct timex ntx, _ntx;
int times[20];
double ftemp, gtemp;
l_fp ts;
int c;
int errflg = 0;
int cost = 0;
int rawtime = 0;
memset((char *)&ntx, 0, sizeof(ntx));
progname = argv[0];
while ((c = ntp_getopt(argc, argv, optargs)) != EOF) switch (c) {
case 'c':
cost++;
break;
case 'e':
ntx.modes |= MOD_ESTERROR;
ntx.esterror = atoi(ntp_optarg);
break;
case 'f':
ntx.modes |= MOD_FREQUENCY;
ntx.freq = (int) (atof(ntp_optarg) *
(1 << SHIFT_USEC));
if (ntx.freq < (-100 << SHIFT_USEC)
|| ntx.freq > ( 100 << SHIFT_USEC)) errflg++;
break;
case 'm':
ntx.modes |= MOD_MAXERROR;
ntx.maxerror = atoi(ntp_optarg);
break;
case 'o':
ntx.modes |= MOD_OFFSET;
ntx.offset = atoi(ntp_optarg);
break;
case 'r':
rawtime++;
break;
case 's':
ntx.modes |= MOD_STATUS;
ntx.status = atoi(ntp_optarg);
if (ntx.status < 0 || ntx.status > 4) errflg++;
break;
case 't':
ntx.modes |= MOD_TIMECONST;
ntx.constant = atoi(ntp_optarg);
if (ntx.constant < 0 || ntx.constant > MAXTC)
errflg++;
break;
default:
errflg++;
}
if (errflg || (ntp_optind != argc)) {
(void) fprintf(stderr,
"usage: %s [-%s]\n\n\
-c display the time taken to call ntp_gettime (us)\n\
-e esterror estimate of the error (us)\n\
-f frequency Frequency error (-100 .. 100) (ppm)\n\
-h display this help info\n\
-m maxerror max possible error (us)\n\
-o offset current offset (ms)\n\
-r print the unix and NTP time raw\n\
-l leap Set the leap bits\n\
-t timeconstant log2 of PLL time constant (0 .. %d)\n",
progname, optargs, MAXTC);
exit(2);
}
/*
* Test to make sure the sigvec() works in case of invalid
* syscall codes.
*/
newsigsys.sv_handler = pll_trap;
newsigsys.sv_mask = 0;
newsigsys.sv_flags = 0;
if (sigvec(SIGSYS, &newsigsys, &sigsys)) {
perror("sigvec() fails to save SIGSYS trap");
exit(1);
}
#ifdef BADCALL
/*
* Make sure the trapcatcher works.
*/
pll_control = 1;
(void)syscall(BADCALL, &ntv); /* dummy parameter f. ANSI compilers */
if (pll_control)
printf("sigvec() failed to catch an invalid syscall\n");
#endif
if (cost) {
for (c = 0; c < sizeof times / sizeof times[0]; c++) {
(void)ntp_gettime(&ntv);
if (pll_control < 0)
break;
times[c] = ntv.time.tv_usec;
}
if (pll_control >= 0) {
printf("[ us %06d:", times[0]);
for (c = 1; c < sizeof times / sizeof times[0]; c++)
printf(" %d", times[c] - times[c - 1]);
printf(" ]\n");
}
}
(void)ntp_gettime(&ntv);
_ntx.modes = 0; /* Ensure nothing is set */
(void)ntp_adjtime(&_ntx);
if (pll_control < 0) {
printf("NTP user interface routines are not configured in this kernel.\n");
goto lexit;
}
/*
* Fetch timekeeping data and display.
*/
status = ntp_gettime(&ntv);
if (status < 0)
perror("ntp_gettime() call fails");
else {
printf("ntp_gettime() returns code %d\n", status);
TVTOTS(&ntv.time, &ts);
ts.l_uf += TS_ROUNDBIT; /* guaranteed not to overflow */
ts.l_ui += JAN_1970;
ts.l_uf &= TS_MASK;
printf(" time %s, (.%06d),\n",
prettydate(&ts), ntv.time.tv_usec);
printf(" maximum error %ld us, estimated error %ld us.\n",
ntv.maxerror, ntv.esterror);
if (rawtime) printf(" ntptime=%x.%x unixtime=%x.%06d %s",
ts.l_ui, ts.l_uf, ntv.time.tv_sec, ntv.time.tv_usec,
ctime(&ntv.time.tv_sec));
}
status = ntp_adjtime(&ntx);
if (status < 0)
perror((errno == EPERM) ?
"Must be root to set kernel values\nntp_adjtime() call fails" :
"ntp_adjtime() call fails");
else {
printf("ntp_adjtime() returns code %d\n", status);
ftemp = ntx.freq;
ftemp /= (1 << SHIFT_USEC);
printf(" modes %04x, offset %ld us, frequency %.3f ppm, interval %d s,\n",
ntx.modes, ntx.offset, ftemp, 1 << ntx.shift);
printf(" maximum error %ld us, estimated error %ld us,\n",
ntx.maxerror, ntx.esterror);
ftemp = ntx.tolerance;
ftemp /= (1 << SHIFT_USEC);
printf(" status %04x, time constant %ld, precision %ld us, tolerance %.0f ppm,\n",
ntx.status, ntx.constant, ntx.precision, ftemp);
if (ntx.shift == 0)
return;
ftemp = ntx.ppsfreq;
ftemp /= (1 << SHIFT_USEC);
gtemp = ntx.stabil;
gtemp /= (1 << SHIFT_USEC);
printf(" pps frequency %.3f ppm, stability %.3f ppm, jitter %ld us,\n",
ftemp, gtemp, ntx.jitter);
printf(" intervals %ld, jitter exceeded %ld, stability exceeded %ld, errors %ld.\n",
ntx.calcnt, ntx.jitcnt, ntx.stbcnt, ntx.errcnt);
}
/*
* Put things back together the way we found them.
*/
lexit: if (sigvec(SIGSYS, &sigsys, (struct sigvec *)NULL)) {
perror("sigvec() fails to restore SIGSYS trap");
exit(1);
}
exit(0);
}
/*
* pll1_trap - trap processor for undefined syscalls
*/
void
pll_trap()
{
pll_control--;
}
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