freebsd-skq/contrib/ntp/ntpd/ntp_util.c

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1999-12-09 13:01:21 +00:00
/*
* ntp_util.c - stuff I didn't have any other place for
*/
#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
#include "ntpd.h"
#include "ntp_unixtime.h"
#include "ntp_filegen.h"
#include "ntp_if.h"
#include "ntp_stdlib.h"
#include "ntp_assert.h"
#include "ntp_calendar.h"
#include "ntp_leapsec.h"
#include "lib_strbuf.h"
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#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <sys/stat.h>
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#ifdef HAVE_IEEEFP_H
# include <ieeefp.h>
#endif
#ifdef HAVE_MATH_H
# include <math.h>
#endif
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#if defined(VMS)
# include <descrip.h>
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#endif /* VMS */
/*
* Defines used by the leapseconds stuff
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*/
#define MAX_TAI 100 /* max TAI offset (s) */
#define L_DAY 86400UL /* seconds per day */
#define L_YEAR (L_DAY * 365) /* days per year */
#define L_LYEAR (L_YEAR + L_DAY) /* days per leap year */
#define L_4YEAR (L_LYEAR + 3 * L_YEAR) /* days per leap cycle */
#define L_CENT (L_4YEAR * 25) /* days per century */
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/*
* This contains odds and ends, including the hourly stats, various
* configuration items, leapseconds stuff, etc.
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*/
/*
* File names
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*/
static char *key_file_name; /* keys file name */
static char *leapfile_name; /* leapseconds file name */
static struct stat leapfile_stat; /* leapseconds file stat() buffer */
static int /*BOOL*/have_leapfile = FALSE;
char *stats_drift_file; /* frequency file name */
static char *stats_temp_file; /* temp frequency file name */
static double wander_resid; /* last frequency update */
double wander_threshold = 1e-7; /* initial frequency threshold */
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/*
* Statistics file stuff
*/
#ifndef NTP_VAR
# ifndef SYS_WINNT
# define NTP_VAR "/var/NTP/" /* NOTE the trailing '/' */
# else
# define NTP_VAR "c:\\var\\ntp\\" /* NOTE the trailing '\\' */
# endif /* SYS_WINNT */
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#endif
char statsdir[MAXFILENAME] = NTP_VAR;
static FILEGEN peerstats;
static FILEGEN loopstats;
static FILEGEN clockstats;
static FILEGEN rawstats;
static FILEGEN sysstats;
static FILEGEN protostats;
static FILEGEN cryptostats;
static FILEGEN timingstats;
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/*
* This controls whether stats are written to the fileset. Provided
* so that ntpdc can turn off stats when the file system fills up.
*/
int stats_control;
/*
* Last frequency written to file.
*/
static double prev_drift_comp; /* last frequency update */
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/*
* Function prototypes
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*/
static void record_sys_stats(void);
void ntpd_time_stepped(void);
static void check_leap_expiration(int, uint32_t, const time_t*);
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/*
* Prototypes
*/
#ifdef DEBUG
void uninit_util(void);
#endif
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/*
* uninit_util - free memory allocated by init_util
*/
#ifdef DEBUG
void
uninit_util(void)
{
#if defined(_MSC_VER) && defined (_DEBUG)
_CrtCheckMemory();
#endif
if (stats_drift_file) {
free(stats_drift_file);
free(stats_temp_file);
stats_drift_file = NULL;
stats_temp_file = NULL;
}
if (key_file_name) {
free(key_file_name);
key_file_name = NULL;
}
filegen_unregister("peerstats");
filegen_unregister("loopstats");
filegen_unregister("clockstats");
filegen_unregister("rawstats");
filegen_unregister("sysstats");
filegen_unregister("protostats");
#ifdef AUTOKEY
filegen_unregister("cryptostats");
#endif /* AUTOKEY */
#ifdef DEBUG_TIMING
filegen_unregister("timingstats");
#endif /* DEBUG_TIMING */
#if defined(_MSC_VER) && defined (_DEBUG)
_CrtCheckMemory();
#endif
}
#endif /* DEBUG */
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/*
* init_util - initialize the util module of ntpd
*/
void
init_util(void)
{
filegen_register(statsdir, "peerstats", &peerstats);
filegen_register(statsdir, "loopstats", &loopstats);
filegen_register(statsdir, "clockstats", &clockstats);
filegen_register(statsdir, "rawstats", &rawstats);
filegen_register(statsdir, "sysstats", &sysstats);
filegen_register(statsdir, "protostats", &protostats);
filegen_register(statsdir, "cryptostats", &cryptostats);
filegen_register(statsdir, "timingstats", &timingstats);
/*
* register with libntp ntp_set_tod() to call us back
* when time is stepped.
*/
step_callback = &ntpd_time_stepped;
#ifdef DEBUG
atexit(&uninit_util);
#endif /* DEBUG */
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}
/*
* hourly_stats - print some interesting stats
*/
void
write_stats(void)
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{
FILE *fp;
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#ifdef DOSYNCTODR
struct timeval tv;
#if !defined(VMS)
int prio_set;
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#endif
#ifdef HAVE_GETCLOCK
struct timespec ts;
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#endif
int o_prio;
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/*
* Sometimes having a Sun can be a drag.
*
* The kernel variable dosynctodr controls whether the system's
* soft clock is kept in sync with the battery clock. If it
* is zero, then the soft clock is not synced, and the battery
* clock is simply left to rot. That means that when the system
* reboots, the battery clock (which has probably gone wacky)
* sets the soft clock. That means ntpd starts off with a very
* confused idea of what time it is. It then takes a large
* amount of time to figure out just how wacky the battery clock
* has made things drift, etc, etc. The solution is to make the
* battery clock sync up to system time. The way to do THAT is
* to simply set the time of day to the current time of day, but
* as quickly as possible. This may, or may not be a sensible
* thing to do.
*
* CAVEAT: settimeofday() steps the sun clock by about 800 us,
* so setting DOSYNCTODR seems a bad idea in the
* case of us resolution
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*/
#if !defined(VMS)
/*
* (prr) getpriority returns -1 on error, but -1 is also a valid
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* return value (!), so instead we have to zero errno before the
* call and check it for non-zero afterwards.
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*/
errno = 0;
prio_set = 0;
o_prio = getpriority(PRIO_PROCESS,0); /* Save setting */
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/*
* (prr) if getpriority succeeded, call setpriority to raise
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* scheduling priority as high as possible. If that succeeds
* as well, set the prio_set flag so we remember to reset
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* priority to its previous value below. Note that on Solaris
* 2.6 (and beyond?), both getpriority and setpriority will fail
* with ESRCH, because sched_setscheduler (called from main) put
* us in the real-time scheduling class which setpriority
* doesn't know about. Being in the real-time class is better
* than anything setpriority can do, anyhow, so this error is
* silently ignored.
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*/
if ((errno == 0) && (setpriority(PRIO_PROCESS,0,-20) == 0))
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prio_set = 1; /* overdrive */
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#endif /* VMS */
#ifdef HAVE_GETCLOCK
(void) getclock(TIMEOFDAY, &ts);
tv.tv_sec = ts.tv_sec;
tv.tv_usec = ts.tv_nsec / 1000;
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#else /* not HAVE_GETCLOCK */
GETTIMEOFDAY(&tv,(struct timezone *)NULL);
#endif /* not HAVE_GETCLOCK */
if (ntp_set_tod(&tv,(struct timezone *)NULL) != 0)
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msyslog(LOG_ERR, "can't sync battery time: %m");
#if !defined(VMS)
if (prio_set)
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setpriority(PRIO_PROCESS, 0, o_prio); /* downshift */
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#endif /* VMS */
#endif /* DOSYNCTODR */
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record_sys_stats();
if (stats_drift_file != 0) {
/*
* When the frequency file is written, initialize the
* prev_drift_comp and wander_resid. Thereafter,
* reduce the wander_resid by half each hour. When
* the difference between the prev_drift_comp and
* drift_comp is less than the wander_resid, update
* the frequncy file. This minimizes the file writes to
* nonvolaile storage.
*/
#ifdef DEBUG
if (debug)
printf("write_stats: frequency %.6lf thresh %.6lf, freq %.6lf\n",
(prev_drift_comp - drift_comp) * 1e6, wander_resid *
1e6, drift_comp * 1e6);
#endif
if (fabs(prev_drift_comp - drift_comp) < wander_resid) {
wander_resid *= 0.5;
return;
}
prev_drift_comp = drift_comp;
wander_resid = wander_threshold;
if ((fp = fopen(stats_temp_file, "w")) == NULL) {
msyslog(LOG_ERR, "frequency file %s: %m",
stats_temp_file);
return;
}
fprintf(fp, "%.3f\n", drift_comp * 1e6);
(void)fclose(fp);
/* atomic */
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#ifdef SYS_WINNT
if (_unlink(stats_drift_file)) /* rename semantics differ under NT */
msyslog(LOG_WARNING,
"Unable to remove prior drift file %s, %m",
stats_drift_file);
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#endif /* SYS_WINNT */
#ifndef NO_RENAME
if (rename(stats_temp_file, stats_drift_file))
msyslog(LOG_WARNING,
"Unable to rename temp drift file %s to %s, %m",
stats_temp_file, stats_drift_file);
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#else
/* we have no rename NFS of ftp in use */
if ((fp = fopen(stats_drift_file, "w")) ==
NULL) {
msyslog(LOG_ERR,
"frequency file %s: %m",
stats_drift_file);
return;
}
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#endif
#if defined(VMS)
/* PURGE */
{
$DESCRIPTOR(oldvers,";-1");
struct dsc$descriptor driftdsc = {
strlen(stats_drift_file), 0, 0,
stats_drift_file };
while(lib$delete_file(&oldvers,
&driftdsc) & 1);
}
#endif
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}
}
/*
* stats_config - configure the stats operation
*/
void
stats_config(
int item,
const char *invalue /* only one type so far */
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)
{
FILE *fp;
const char *value;
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size_t len;
double old_drift;
l_fp now;
time_t ttnow;
#ifndef VMS
const char temp_ext[] = ".TEMP";
#else
const char temp_ext[] = "-TEMP";
#endif
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/*
* Expand environment strings under Windows NT, since the
* command interpreter doesn't do this, the program must.
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*/
#ifdef SYS_WINNT
char newvalue[MAX_PATH], parameter[MAX_PATH];
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if (!ExpandEnvironmentStrings(invalue, newvalue, MAX_PATH)) {
switch (item) {
case STATS_FREQ_FILE:
strlcpy(parameter, "STATS_FREQ_FILE",
sizeof(parameter));
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break;
case STATS_LEAP_FILE:
strlcpy(parameter, "STATS_LEAP_FILE",
sizeof(parameter));
break;
case STATS_STATSDIR:
strlcpy(parameter, "STATS_STATSDIR",
sizeof(parameter));
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break;
case STATS_PID_FILE:
strlcpy(parameter, "STATS_PID_FILE",
sizeof(parameter));
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break;
default:
strlcpy(parameter, "UNKNOWN",
sizeof(parameter));
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break;
}
value = invalue;
msyslog(LOG_ERR,
"ExpandEnvironmentStrings(%s) failed: %m\n",
parameter);
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} else {
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value = newvalue;
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}
#else
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value = invalue;
#endif /* SYS_WINNT */
switch (item) {
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/*
* Open and read frequency file.
*/
case STATS_FREQ_FILE:
if (!value || (len = strlen(value)) == 0)
break;
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stats_drift_file = erealloc(stats_drift_file, len + 1);
stats_temp_file = erealloc(stats_temp_file,
len + sizeof(".TEMP"));
memcpy(stats_drift_file, value, (size_t)(len+1));
memcpy(stats_temp_file, value, (size_t)len);
memcpy(stats_temp_file + len, temp_ext, sizeof(temp_ext));
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/*
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* Open drift file and read frequency. If the file is
* missing or contains errors, tell the loop to reset.
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*/
if ((fp = fopen(stats_drift_file, "r")) == NULL)
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break;
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if (fscanf(fp, "%lf", &old_drift) != 1) {
msyslog(LOG_ERR,
"format error frequency file %s",
stats_drift_file);
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fclose(fp);
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break;
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}
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fclose(fp);
loop_config(LOOP_FREQ, old_drift);
prev_drift_comp = drift_comp;
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break;
/*
* Specify statistics directory.
*/
case STATS_STATSDIR:
/* - 1 since value may be missing the DIR_SEP. */
if (strlen(value) >= sizeof(statsdir) - 1) {
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msyslog(LOG_ERR,
"statsdir too long (>%d, sigh)",
(int)sizeof(statsdir) - 2);
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} else {
int add_dir_sep;
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size_t value_l;
/* Add a DIR_SEP unless we already have one. */
value_l = strlen(value);
if (0 == value_l)
add_dir_sep = FALSE;
else
add_dir_sep = (DIR_SEP !=
value[value_l - 1]);
if (add_dir_sep)
snprintf(statsdir, sizeof(statsdir),
"%s%c", value, DIR_SEP);
else
snprintf(statsdir, sizeof(statsdir),
"%s", value);
filegen_statsdir();
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}
break;
/*
* Open pid file.
*/
case STATS_PID_FILE:
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if ((fp = fopen(value, "w")) == NULL) {
msyslog(LOG_ERR, "pid file %s: %m",
value);
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break;
}
fprintf(fp, "%d", (int)getpid());
fclose(fp);
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break;
/*
* Read leapseconds file.
*
* Note: Currently a leap file without SHA1 signature is
* accepted, but if there is a signature line, the signature
* must be valid or the file is rejected.
*/
case STATS_LEAP_FILE:
if (!value || (len = strlen(value)) == 0)
break;
leapfile_name = erealloc(leapfile_name, len + 1);
memcpy(leapfile_name, value, len + 1);
if (leapsec_load_file(
leapfile_name, &leapfile_stat, TRUE, TRUE))
{
leap_signature_t lsig;
get_systime(&now);
time(&ttnow);
leapsec_getsig(&lsig);
mprintf_event(EVNT_TAI, NULL,
"%d leap %s %s %s",
lsig.taiof,
fstostr(lsig.ttime),
leapsec_expired(now.l_ui, NULL)
? "expired"
: "expires",
fstostr(lsig.etime));
have_leapfile = TRUE;
/* force an immediate daily expiration check of
* the leap seconds table
*/
check_leap_expiration(TRUE, now.l_ui, &ttnow);
}
break;
default:
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/* oh well */
break;
}
}
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/*
* record_peer_stats - write peer statistics to file
*
* file format:
* day (MJD)
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* time (s past UTC midnight)
* IP address
* status word (hex)
* offset
* delay
* dispersion
* jitter
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*/
void
record_peer_stats(
sockaddr_u *addr,
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int status,
double offset, /* offset */
double delay, /* delay */
double dispersion, /* dispersion */
double jitter /* jitter */
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)
{
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l_fp now;
u_long day;
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if (!stats_control)
return;
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get_systime(&now);
filegen_setup(&peerstats, now.l_ui);
day = now.l_ui / 86400 + MJD_1900;
now.l_ui %= 86400;
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if (peerstats.fp != NULL) {
fprintf(peerstats.fp,
"%lu %s %s %x %.9f %.9f %.9f %.9f\n", day,
ulfptoa(&now, 3), stoa(addr), status, offset,
delay, dispersion, jitter);
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fflush(peerstats.fp);
}
}
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/*
* record_loop_stats - write loop filter statistics to file
*
* file format:
* day (MJD)
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* time (s past midnight)
* offset
* frequency (PPM)
* jitter
* wnder (PPM)
* time constant (log2)
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*/
void
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record_loop_stats(
double offset, /* offset */
double freq, /* frequency (PPM) */
double jitter, /* jitter */
double wander, /* wander (PPM) */
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int spoll
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)
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{
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l_fp now;
u_long day;
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if (!stats_control)
return;
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get_systime(&now);
filegen_setup(&loopstats, now.l_ui);
day = now.l_ui / 86400 + MJD_1900;
now.l_ui %= 86400;
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if (loopstats.fp != NULL) {
fprintf(loopstats.fp, "%lu %s %.9f %.3f %.9f %.6f %d\n",
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day, ulfptoa(&now, 3), offset, freq * 1e6, jitter,
wander * 1e6, spoll);
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fflush(loopstats.fp);
}
}
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/*
* record_clock_stats - write clock statistics to file
*
* file format:
* day (MJD)
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* time (s past midnight)
* IP address
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* text message
*/
void
record_clock_stats(
sockaddr_u *addr,
const char *text /* timecode string */
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)
{
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l_fp now;
u_long day;
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if (!stats_control)
return;
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get_systime(&now);
filegen_setup(&clockstats, now.l_ui);
day = now.l_ui / 86400 + MJD_1900;
now.l_ui %= 86400;
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if (clockstats.fp != NULL) {
fprintf(clockstats.fp, "%lu %s %s %s\n", day,
ulfptoa(&now, 3), stoa(addr), text);
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fflush(clockstats.fp);
}
}
/*
* mprintf_clock_stats - write clock statistics to file with
* msnprintf-style formatting.
*/
int
mprintf_clock_stats(
sockaddr_u *addr,
const char *fmt,
...
)
{
va_list ap;
int rc;
char msg[512];
va_start(ap, fmt);
rc = mvsnprintf(msg, sizeof(msg), fmt, ap);
va_end(ap);
if (stats_control)
record_clock_stats(addr, msg);
return rc;
}
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/*
* record_raw_stats - write raw timestamps to file
*
* file format
* day (MJD)
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* time (s past midnight)
* peer ip address
* IP address
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* t1 t2 t3 t4 timestamps
*/
void
record_raw_stats(
sockaddr_u *srcadr,
sockaddr_u *dstadr,
l_fp *t1, /* originate timestamp */
l_fp *t2, /* receive timestamp */
l_fp *t3, /* transmit timestamp */
l_fp *t4, /* destination timestamp */
int leap,
int version,
int mode,
int stratum,
int ppoll,
int precision,
double root_delay, /* seconds */
double root_dispersion,/* seconds */
u_int32 refid
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)
{
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l_fp now;
u_long day;
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if (!stats_control)
return;
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get_systime(&now);
filegen_setup(&rawstats, now.l_ui);
day = now.l_ui / 86400 + MJD_1900;
now.l_ui %= 86400;
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if (rawstats.fp != NULL) {
fprintf(rawstats.fp, "%lu %s %s %s %s %s %s %s %d %d %d %d %d %d %.6f %.6f %s\n",
day, ulfptoa(&now, 3),
stoa(srcadr), dstadr ? stoa(dstadr) : "-",
ulfptoa(t1, 9), ulfptoa(t2, 9),
ulfptoa(t3, 9), ulfptoa(t4, 9),
leap, version, mode, stratum, ppoll, precision,
root_delay, root_dispersion, refid_str(refid, stratum));
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fflush(rawstats.fp);
}
}
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/*
* record_sys_stats - write system statistics to file
*
* file format
* day (MJD)
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* time (s past midnight)
* time since reset
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* packets recieved
* packets for this host
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* current version
* old version
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* access denied
* bad length or format
* bad authentication
* declined
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* rate exceeded
* KoD sent
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*/
void
record_sys_stats(void)
{
l_fp now;
u_long day;
if (!stats_control)
return;
get_systime(&now);
filegen_setup(&sysstats, now.l_ui);
day = now.l_ui / 86400 + MJD_1900;
now.l_ui %= 86400;
if (sysstats.fp != NULL) {
fprintf(sysstats.fp,
"%lu %s %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu\n",
day, ulfptoa(&now, 3), current_time - sys_stattime,
sys_received, sys_processed, sys_newversion,
sys_oldversion, sys_restricted, sys_badlength,
sys_badauth, sys_declined, sys_limitrejected,
sys_kodsent);
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fflush(sysstats.fp);
proto_clr_stats();
}
}
/*
* record_proto_stats - write system statistics to file
*
* file format
* day (MJD)
* time (s past midnight)
* text message
*/
void
record_proto_stats(
char *str /* text string */
)
{
l_fp now;
u_long day;
if (!stats_control)
return;
get_systime(&now);
filegen_setup(&protostats, now.l_ui);
day = now.l_ui / 86400 + MJD_1900;
now.l_ui %= 86400;
if (protostats.fp != NULL) {
fprintf(protostats.fp, "%lu %s %s\n", day,
ulfptoa(&now, 3), str);
fflush(protostats.fp);
}
}
#ifdef AUTOKEY
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/*
* record_crypto_stats - write crypto statistics to file
*
* file format:
* day (mjd)
* time (s past midnight)
* peer ip address
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* text message
*/
void
record_crypto_stats(
sockaddr_u *addr,
const char *text /* text message */
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)
{
l_fp now;
u_long day;
if (!stats_control)
return;
get_systime(&now);
filegen_setup(&cryptostats, now.l_ui);
day = now.l_ui / 86400 + MJD_1900;
now.l_ui %= 86400;
if (cryptostats.fp != NULL) {
if (addr == NULL)
fprintf(cryptostats.fp, "%lu %s 0.0.0.0 %s\n",
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day, ulfptoa(&now, 3), text);
else
fprintf(cryptostats.fp, "%lu %s %s %s\n",
day, ulfptoa(&now, 3), stoa(addr), text);
fflush(cryptostats.fp);
}
}
#endif /* AUTOKEY */
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#ifdef DEBUG_TIMING
/*
* record_timing_stats - write timing statistics to file
*
* file format:
* day (mjd)
* time (s past midnight)
* text message
*/
void
record_timing_stats(
const char *text /* text message */
)
{
static unsigned int flshcnt;
l_fp now;
u_long day;
if (!stats_control)
return;
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get_systime(&now);
filegen_setup(&timingstats, now.l_ui);
day = now.l_ui / 86400 + MJD_1900;
now.l_ui %= 86400;
if (timingstats.fp != NULL) {
fprintf(timingstats.fp, "%lu %s %s\n", day, lfptoa(&now,
3), text);
if (++flshcnt % 100 == 0)
fflush(timingstats.fp);
}
}
#endif
/*
* check_leap_file - See if the leapseconds file has been updated.
*
* Returns: n/a
*
* Note: This loads a new leapfile on the fly. Currently a leap file
* without SHA1 signature is accepted, but if there is a signature line,
* the signature must be valid or the file is rejected.
*/
void
check_leap_file(
int is_daily_check,
uint32_t ntptime ,
const time_t *systime
)
{
/* just do nothing if there is no leap file */
if ( ! (leapfile_name && *leapfile_name))
return;
/* try to load leapfile, force it if no leapfile loaded yet */
if (leapsec_load_file(
leapfile_name, &leapfile_stat,
!have_leapfile, is_daily_check))
have_leapfile = TRUE;
else if (!have_leapfile)
return;
check_leap_expiration(is_daily_check, ntptime, systime);
}
/*
* check expiration of a loaded leap table
*/
static void
check_leap_expiration(
int is_daily_check,
uint32_t ntptime ,
const time_t *systime
)
{
static const char * const logPrefix = "leapsecond file";
int rc;
/* test the expiration of the leap data and log with proper
* level and frequency (once/hour or once/day, depending on the
* state.
*/
rc = leapsec_daystolive(ntptime, systime);
if (rc == 0) {
msyslog(LOG_WARNING,
"%s ('%s'): will expire in less than one day",
logPrefix, leapfile_name);
} else if (is_daily_check && rc < 28) {
if (rc < 0)
msyslog(LOG_ERR,
"%s ('%s'): expired less than %d day%s ago",
logPrefix, leapfile_name, -rc, (rc == -1 ? "" : "s"));
else
msyslog(LOG_WARNING,
"%s ('%s'): will expire in less than %d days",
logPrefix, leapfile_name, 1+rc);
}
}
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/*
* getauthkeys - read the authentication keys from the specified file
*/
void
getauthkeys(
const char *keyfile
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)
{
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size_t len;
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len = strlen(keyfile);
if (!len)
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return;
#ifndef SYS_WINNT
key_file_name = erealloc(key_file_name, len + 1);
memcpy(key_file_name, keyfile, len + 1);
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#else
key_file_name = erealloc(key_file_name, _MAX_PATH);
if (len + 1 > _MAX_PATH)
return;
if (!ExpandEnvironmentStrings(keyfile, key_file_name,
_MAX_PATH)) {
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msyslog(LOG_ERR,
"ExpandEnvironmentStrings(KEY_FILE) failed: %m");
strlcpy(key_file_name, keyfile, _MAX_PATH);
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}
key_file_name = erealloc(key_file_name,
1 + strlen(key_file_name));
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#endif /* SYS_WINNT */
authreadkeys(key_file_name);
}
/*
* rereadkeys - read the authentication key file over again.
*/
void
rereadkeys(void)
{
if (NULL != key_file_name)
authreadkeys(key_file_name);
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}
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#if notyet
/*
* ntp_exit - document explicitly that ntpd has exited
*/
void
ntp_exit(int retval)
{
msyslog(LOG_ERR, "EXITING with return code %d", retval);
exit(retval);
}
#endif
/*
* fstostr - prettyprint NTP seconds
*/
char * fstostr(
time_t ntp_stamp
)
{
char * buf;
struct calendar tm;
LIB_GETBUF(buf);
if (ntpcal_ntp_to_date(&tm, (u_int32)ntp_stamp, NULL) < 0)
snprintf(buf, LIB_BUFLENGTH, "ntpcal_ntp_to_date: %ld: range error",
(long)ntp_stamp);
else
snprintf(buf, LIB_BUFLENGTH, "%04d%02d%02d%02d%02d",
tm.year, tm.month, tm.monthday,
tm.hour, tm.minute);
return buf;
}
/*
* ntpd_time_stepped is called back by step_systime(), allowing ntpd
* to do any one-time processing necessitated by the step.
*/
void
ntpd_time_stepped(void)
{
u_int saved_mon_enabled;
/*
* flush the monitor MRU list which contains l_fp timestamps
* which should not be compared across the step.
*/
if (MON_OFF != mon_enabled) {
saved_mon_enabled = mon_enabled;
mon_stop(MON_OFF);
mon_start(saved_mon_enabled);
}
/* inform interpolating Windows code to allow time to go back */
#ifdef SYS_WINNT
win_time_stepped();
#endif
}