# 2.11BSD#431 - /usr/src/usr.sbin/timed/correct.c

##### Functions

    adjclock          X
    correct           X
    mstotvround       X
    timevaladd        X

       1: /*
       2:  * Copyright (c) 1985 Regents of the University of California.
       3:  * All rights reserved.  The Berkeley software License Agreement
       4:  * specifies the terms and conditions for redistribution.
       5:  */
       6:
       7: #ifndef lint
       8: static char sccsid[] = "@(#)correct.c	2.3 (Berkeley) 5/28/86";
       9: #endif not lint
      10:
      11: #include "globals.h"
      12: #include <protocols/timed.h>
      13:
      14: #ifdef MEASURE
      15: extern FILE *fp;
      16: #endif
      17:
      18: /*
      19:  * `correct' sends to the slaves the corrections for their clocks
      20:  */
      21:
      22: correct(avdelta)
      23: long avdelta;
      24: {
      25:     int i;
      26:     long corr;
      27:     struct timeval adjlocal;
      28:     struct tsp msgs;
      29:     struct timeval mstotvround();
      30:     struct tsp *answer, *acksend();
      31:
      32: #ifdef MEASURE
      33:     for(i=0; i<slvcount; i++) {
      34:         if (hp[i].delta == HOSTDOWN)
      35:             fprintf(fp, "%s\t", "down");
      36:         else {
      37:             fprintf(fp, "%ld\t", hp[i].delta);
      38:         }
      39:     }
      40:     fprintf(fp, "\n");
      41: #endif
      42:     corr = avdelta - hp[0].delta;
      43:     adjlocal = mstotvround(&corr);
      44:     adjclock(&adjlocal);
      45: #ifdef MEASURE
      46:     fprintf(fp, "%ld\t", corr);
      47: #endif
      48:
      49:     for(i=1; i<slvcount; i++) {
      50:         if (hp[i].delta != HOSTDOWN)  {
      51:             corr = avdelta - hp[i].delta;
      52:             msgs.tsp_time = mstotvround(&corr);
      53:             msgs.tsp_type = (u_char)TSP_ADJTIME;
      54:             (void)strcpy(msgs.tsp_name, hostname);
      55:             answer = acksend(&msgs, &hp[i].addr, hp[i].name,
      56:                 TSP_ACK, (struct netinfo *)NULL);
      57:             if (answer == NULL) {
      58:                 hp[i].delta = HOSTDOWN;
      59: #ifdef MEASURE
      60:                 fprintf(fp, "%s\t", "down");
      61:             } else {
      62:                 fprintf(fp, "%ld\t", corr);
      63: #endif
      64:             }
      65:         } else {
      66: #ifdef MEASURE
      67:             fprintf(fp, "%s\t", "down");
      68: #endif
      69:         }
      70:     }
      71: #ifdef MEASURE
      72:     fprintf(fp, "\n");
      73: #endif
      74: }
      75:
      76: /*
      77:  * `mstotvround' rounds up the value of the argument to the
      78:  * nearest multiple of five, and converts it into a timeval
      79:  */
      80:
      81: struct timeval mstotvround(x)
      82: long *x;
      83: {
      84:     int temp;
      85:     struct timeval adj;
      86:
      87:     temp = *x % 5;
      88:     if (temp >= 3)
      89:         *x = *x-temp+5;
      90:     else {
      91:         if (temp <= -3)
      92:             *x = *x - temp -5;
      93:         else
      94:             *x = *x-temp;
      95:     }
      96:     adj.tv_sec = *x/1000;
      97:     adj.tv_usec = (*x-adj.tv_sec*1000)*1000;
      98:     if (adj.tv_usec < 0) {
      99:         adj.tv_usec += 1000000;
     100:         adj.tv_sec--;
     101:     }
     102:     return(adj);
     103: }
     104:
     105: adjclock(corr)
     106: struct timeval *corr;
     107: {
     108:     struct timeval now;
     109:
     110:     if (timerisset(corr)) {
     111:         if (corr->tv_sec < MAXADJ && corr->tv_sec > - MAXADJ) {
     112:             (void)adjtime(corr, (struct timeval *)0);
     113:         } else {
     114:             syslog(LOG_WARNING,
     115:                 "clock correction too large to adjust (%ld sec)",
     116:                 corr->tv_sec);
     117:             (void) gettimeofday(&now, (struct timezone *)0);
     118:             timevaladd(&now, corr);
     119:             if (settimeofday(&now, (struct timezone *)0) < 0)
     120:                 syslog(LOG_ERR, "can't set time");
     121:         }
     122:     }
     123: }
     124:
     125: timevaladd(tv1, tv2)
     126:     register struct timeval *tv1, *tv2;
     127: {
     128:
     129:     tv1->tv_sec += tv2->tv_sec;
     130:     tv1->tv_usec += tv2->tv_usec;
     131:     if (tv1->tv_usec >= 1000000) {
     132:         tv1->tv_sec++;
     133:         tv1->tv_usec -= 1000000;
     134:     }
     135:     if (tv1->tv_usec < 0) {
     136:         tv1->tv_sec--;
     137:         tv1->tv_usec += 1000000;
     138:     }
     139: }

#### Defined functions

adjclock defined in line 105; used 2 times

- in line 44
- in /usr/src/usr.sbin/timed/slave.c line 192

correct defined in line 22; used 4 times

- in /usr/src/usr.sbin/timed/master.c line 289, 323, 331, 354

mstotvround defined in line 81; used 3 times

- in line 29, 43, 52

timevaladd defined in line 125; used 1 times

- in line 118

#### Defined variables

sccsid defined in line 8; never used

Last modified: 1988-12-25 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 1660 |