contrib/ntp/libntp/humandate.c

   1 /*
   2  * humandate - convert an NTP (or the current) time to something readable
   3  */
   4 #include <stdio.h>
   5 #include "ntp_fp.h"
   6 #include "ntp_unixtime.h"       /* includes <sys/time.h> and <time.h> */
   7 #include "lib_strbuf.h"
   8 #include "ntp_stdlib.h"
   9
  10 static const char *months[] = {
  11         "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  12         "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
  13 };
  14 static const char *days[] = {
  15         "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
  16 };
  17
  18 char *
  19 humandate(
  20         u_long ntptime
  21         )
  22 {
  23         char *bp;
  24         struct tm *tm;
  25         time_t sec;
  26
  27         sec = ntptime - JAN_1970;
  28         tm = localtime(&sec);
  29
  30         if (!tm)
  31                 return "--- --- -- ---- --:--:--";
  32
  33         LIB_GETBUF(bp);
  34
  35         (void) sprintf(bp, "%s, %s %2d %4d %2d:%02d:%02d",
  36                        days[tm->tm_wday], months[tm->tm_mon], tm->tm_mday,
  37                        1900+tm->tm_year, tm->tm_hour, tm->tm_min, tm->tm_sec);
  38
  39         return bp;
  40 }
  41
  42
  43 /* This is used in msyslog.c; we don't want to clutter up the log with
  44    the year and day of the week, etc.; just the minimal date and time.  */
  45
  46 char *
  47 humanlogtime(void)
  48 {
  49         char *bp;
  50         time_t cursec = time((time_t *) 0);
  51         struct tm *tm = localtime(&cursec);
  52
  53         if (!tm)
  54                 return "-- --- --:--:--";
  55
  56         LIB_GETBUF(bp);
  57
  58         (void) sprintf(bp, "%2d %s %02d:%02d:%02d",
  59                        tm->tm_mday, months[tm->tm_mon],
  60                        tm->tm_hour, tm->tm_min, tm->tm_sec);
  61
  62         return bp;
  63 }