400 lines
9.2 KiB
C
400 lines
9.2 KiB
C
/*
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* NTP test program
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*
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* This program tests to see if the NTP user interface routines
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* ntp_gettime() and ntp_adjtime() have been implemented in the kernel.
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* If so, each of these routines is called to display current timekeeping
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* data.
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*
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* For more information, see the README.kern file in the doc directory
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* of the xntp3 distribution.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <stdio.h>
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#include <ctype.h>
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#include <sys/time.h>
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#include <signal.h>
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#include <setjmp.h>
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#include "ntp_fp.h"
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#include "ntp_unixtime.h"
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#include "ntp_syscall.h"
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#include "ntp_stdlib.h"
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#ifdef NTP_SYSCALLS_STD
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# ifndef SYS_DECOSF1
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# define BADCALL -1 /* this is supposed to be a bad syscall */
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# endif /* SYS_DECOSF1 */
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#endif
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#ifdef HAVE_TV_NSEC_IN_NTPTIMEVAL
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#define tv_frac_sec tv_nsec
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#else
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#define tv_frac_sec tv_usec
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#endif
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#define TIMEX_MOD_BITS \
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"\20\1OFFSET\2FREQUENCY\3MAXERROR\4ESTERROR\5STATUS\6TIMECONST\
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\13PLL\14FLL\15MICRO\16NANO\17CLKB\20CLKA"
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#define TIMEX_STA_BITS \
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"\20\1PLL\2PPSFREQ\3PPSTIME\4FLL\5INS\6DEL\7UNSYNC\10FREQHOLD\
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\11PPSSIGNAL\12PPSJITTER\13PPSWANDER\14PPSERROR\15CLOCKERR\
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\16NANO\17MODE\20CLK"
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#define SCALE_FREQ 65536 /* frequency scale */
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/*
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* Function prototypes
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*/
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char *sprintb P((u_int, const char *));
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const char *timex_state P((int));
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volatile int debug = 0;
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#ifdef SIGSYS
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void pll_trap P((int));
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static struct sigaction newsigsys; /* new sigaction status */
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static struct sigaction sigsys; /* current sigaction status */
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static sigjmp_buf env; /* environment var. for pll_trap() */
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#endif
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static volatile int pll_control; /* (0) daemon, (1) kernel loop */
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static volatile int status; /* most recent status bits */
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static volatile int flash; /* most recent ntp_adjtime() bits */
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char* progname;
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static char optargs[] = "cde:f:hm:o:rs:t:";
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int
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main(
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int argc,
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char *argv[]
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)
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{
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extern int ntp_optind;
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extern char *ntp_optarg;
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#ifdef SUBST_ADJTIMEX
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struct timex ntv;
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#else
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struct ntptimeval ntv;
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#endif
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struct timeval tv;
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struct timex ntx, _ntx;
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int times[20];
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double ftemp, gtemp, htemp;
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long time_frac; /* ntv.time.tv_frac_sec (us/ns) */
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l_fp ts;
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unsigned ts_mask = TS_MASK; /* defaults to 20 bits (us) */
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unsigned ts_roundbit = TS_ROUNDBIT; /* defaults to 20 bits (us) */
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int fdigits = 6; /* fractional digits for us */
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int c;
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int errflg = 0;
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int cost = 0;
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int rawtime = 0;
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memset((char *)&ntx, 0, sizeof(ntx));
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progname = argv[0];
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while ((c = ntp_getopt(argc, argv, optargs)) != EOF) switch (c) {
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case 'c':
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cost++;
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break;
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case 'd':
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debug++;
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break;
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case 'e':
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ntx.modes |= MOD_ESTERROR;
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ntx.esterror = atoi(ntp_optarg);
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break;
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case 'f':
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ntx.modes |= MOD_FREQUENCY;
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ntx.freq = (long)(atof(ntp_optarg) * SCALE_FREQ);
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break;
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case 'm':
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ntx.modes |= MOD_MAXERROR;
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ntx.maxerror = atoi(ntp_optarg);
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break;
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case 'o':
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ntx.modes |= MOD_OFFSET;
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ntx.offset = atoi(ntp_optarg);
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break;
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case 'r':
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rawtime++;
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break;
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case 's':
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ntx.modes |= MOD_STATUS;
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ntx.status = atoi(ntp_optarg);
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if (ntx.status < 0 || ntx.status > 4) errflg++;
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break;
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case 't':
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ntx.modes |= MOD_TIMECONST;
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ntx.constant = atoi(ntp_optarg);
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break;
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default:
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errflg++;
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}
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if (errflg || (ntp_optind != argc)) {
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(void) fprintf(stderr,
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"usage: %s [-%s]\n\n\
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-c display the time taken to call ntp_gettime (us)\n\
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-e esterror estimate of the error (us)\n\
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-f frequency Frequency error (-500 .. 500) (ppm)\n\
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-h display this help info\n\
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-m maxerror max possible error (us)\n\
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-o offset current offset (ms)\n\
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-r print the unix and NTP time raw\n\
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-l leap Set the leap bits\n\
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-t timeconstant log2 of PLL time constant (0 .. %d)\n",
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progname, optargs, MAXTC);
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exit(2);
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}
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#ifdef SIGSYS
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/*
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* Test to make sure the sigaction() works in case of invalid
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* syscall codes.
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*/
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newsigsys.sa_handler = pll_trap;
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newsigsys.sa_flags = 0;
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if (sigaction(SIGSYS, &newsigsys, &sigsys)) {
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perror("sigaction() fails to save SIGSYS trap");
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exit(1);
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}
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#endif /* SIGSYS */
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#ifdef BADCALL
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/*
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* Make sure the trapcatcher works.
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*/
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pll_control = 1;
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#ifdef SIGSYS
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if (sigsetjmp(env, 1) == 0)
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{
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#endif
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status = syscall(BADCALL, &ntv); /* dummy parameter */
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if ((status < 0) && (errno == ENOSYS))
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--pll_control;
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#ifdef SIGSYS
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}
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#endif
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if (pll_control)
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printf("sigaction() failed to catch an invalid syscall\n");
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#endif /* BADCALL */
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if (cost) {
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#ifdef SIGSYS
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if (sigsetjmp(env, 1) == 0) {
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#endif
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for (c = 0; c < sizeof times / sizeof times[0]; c++) {
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status = ntp_gettime(&ntv);
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if ((status < 0) && (errno == ENOSYS))
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--pll_control;
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if (pll_control < 0)
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break;
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times[c] = ntv.time.tv_frac_sec;
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}
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#ifdef SIGSYS
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}
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#endif
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if (pll_control >= 0) {
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printf("[ us %06d:", times[0]);
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for (c = 1; c < sizeof times / sizeof times[0]; c++)
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printf(" %d", times[c] - times[c - 1]);
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printf(" ]\n");
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}
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}
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#ifdef SIGSYS
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if (sigsetjmp(env, 1) == 0) {
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#endif
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status = ntp_gettime(&ntv);
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if ((status < 0) && (errno == ENOSYS))
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--pll_control;
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#ifdef SIGSYS
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}
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#endif
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_ntx.modes = 0; /* Ensure nothing is set */
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#ifdef SIGSYS
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if (sigsetjmp(env, 1) == 0) {
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#endif
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status = ntp_adjtime(&_ntx);
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if ((status < 0) && (errno == ENOSYS))
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--pll_control;
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flash = _ntx.status;
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#ifdef SIGSYS
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}
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#endif
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if (pll_control < 0) {
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printf("NTP user interface routines are not configured in this kernel.\n");
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goto lexit;
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}
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/*
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* Fetch timekeeping data and display.
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*/
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status = ntp_gettime(&ntv);
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if (status < 0)
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perror("ntp_gettime() call fails");
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else {
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printf("ntp_gettime() returns code %d (%s)\n",
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status, timex_state(status));
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time_frac = ntv.time.tv_frac_sec;
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#ifdef STA_NANO
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if (flash & STA_NANO) {
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ntv.time.tv_frac_sec /= 1000;
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ts_mask = 0xfffffffc; /* 1/2^30 */
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ts_roundbit = 0x00000002;
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fdigits = 9;
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}
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#endif
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tv.tv_sec = ntv.time.tv_sec;
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tv.tv_usec = ntv.time.tv_frac_sec;
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TVTOTS(&tv, &ts);
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ts.l_ui += JAN_1970;
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ts.l_uf += ts_roundbit;
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ts.l_uf &= ts_mask;
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printf(" time %s, (.%0*d),\n",
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prettydate(&ts), fdigits, (int) time_frac);
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printf(" maximum error %lu us, estimated error %lu us.\n",
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(u_long)ntv.maxerror, (u_long)ntv.esterror);
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if (rawtime) printf(" ntptime=%x.%x unixtime=%x.%0*d %s",
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(unsigned int) ts.l_ui, (unsigned int) ts.l_uf,
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(int) ntv.time.tv_sec, fdigits, (int) time_frac,
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ctime((const time_t *) &ntv.time.tv_sec));
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}
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status = ntp_adjtime(&ntx);
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if (status < 0)
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perror((errno == EPERM) ?
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"Must be root to set kernel values\nntp_adjtime() call fails" :
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"ntp_adjtime() call fails");
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else {
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flash = ntx.status;
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printf("ntp_adjtime() returns code %d (%s)\n",
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status, timex_state(status));
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printf(" modes %s,\n", sprintb(ntx.modes, TIMEX_MOD_BITS));
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ftemp = (double)ntx.offset;
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#ifdef STA_NANO
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if (flash & STA_NANO)
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ftemp /= 1000.0;
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#endif
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printf(" offset %.3f", ftemp);
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ftemp = (double)ntx.freq / SCALE_FREQ;
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printf(" us, frequency %.3f ppm, interval %d s,\n",
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ftemp, 1 << ntx.shift);
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printf(" maximum error %lu us, estimated error %lu us,\n",
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(u_long)ntx.maxerror, (u_long)ntx.esterror);
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printf(" status %s,\n", sprintb((u_int)ntx.status, TIMEX_STA_BITS));
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ftemp = (double)ntx.tolerance / SCALE_FREQ;
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gtemp = (double)ntx.precision;
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#ifdef STA_NANO
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if (flash & STA_NANO)
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gtemp /= 1000.0;
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#endif
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printf(
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" time constant %lu, precision %.3f us, tolerance %.0f ppm,\n",
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(u_long)ntx.constant, gtemp, ftemp);
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if (ntx.shift == 0)
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exit (0);
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ftemp = (double)ntx.ppsfreq / SCALE_FREQ;
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gtemp = (double)ntx.stabil / SCALE_FREQ;
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htemp = (double)ntx.jitter;
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#ifdef STA_NANO
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if (flash & STA_NANO)
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htemp /= 1000.0;
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#endif
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printf(
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" pps frequency %.3f ppm, stability %.3f ppm, jitter %.3f us,\n",
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ftemp, gtemp, htemp);
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printf(" intervals %lu, jitter exceeded %lu, stability exceeded %lu, errors %lu.\n",
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(u_long)ntx.calcnt, (u_long)ntx.jitcnt,
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(u_long)ntx.stbcnt, (u_long)ntx.errcnt);
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return (0);
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}
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/*
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* Put things back together the way we found them.
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*/
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lexit:
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#ifdef SIGSYS
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if (sigaction(SIGSYS, &sigsys, (struct sigaction *)NULL)) {
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perror("sigaction() fails to restore SIGSYS trap");
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exit(1);
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}
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#endif
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exit(0);
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}
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#ifdef SIGSYS
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/*
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* pll_trap - trap processor for undefined syscalls
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*/
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void
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pll_trap(
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int arg
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)
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{
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pll_control--;
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siglongjmp(env, 1);
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}
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#endif
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/*
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* Print a value a la the %b format of the kernel's printf
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*/
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char *
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sprintb(
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register u_int v,
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register const char *bits
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)
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{
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register char *cp;
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register int i, any = 0;
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register char c;
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static char buf[132];
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if (bits && *bits == 8)
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(void)sprintf(buf, "0%o", v);
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else
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(void)sprintf(buf, "0x%x", v);
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cp = buf + strlen(buf);
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bits++;
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if (bits) {
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*cp++ = ' ';
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*cp++ = '(';
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while ((i = *bits++) != 0) {
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if (v & (1 << (i-1))) {
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if (any)
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*cp++ = ',';
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any = 1;
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for (; (c = *bits) > 32; bits++)
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*cp++ = c;
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} else
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for (; *bits > 32; bits++)
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continue;
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}
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*cp++ = ')';
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}
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*cp = '\0';
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return (buf);
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}
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const char *timex_states[] = {
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"OK", "INS", "DEL", "OOP", "WAIT", "ERROR"
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};
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const char *
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timex_state(
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register int s
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)
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{
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static char buf[32];
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if (s >= 0 && s <= sizeof(timex_states) / sizeof(timex_states[0]))
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return (timex_states[s]);
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sprintf(buf, "TIME-#%d", s);
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return (buf);
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}
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