lib/libspl/timestamp.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or https://opensource.org/licenses/CDDL-1.0.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #include <stdio.h>
  27 #include <time.h>
  28 #include <langinfo.h>
  29 #include "statcommon.h"
  30
  31 #ifndef _DATE_FMT
  32 #ifdef D_T_FMT
  33 #define _DATE_FMT D_T_FMT
  34 #else /* D_T_FMT */
  35 #define _DATE_FMT "%+"
  36 #endif /* !D_T_FMT */
  37 #endif /* _DATE_FMT */
  38
  39 /*
  40  * Print timestamp as decimal reprentation of time_t value (-T u was specified)
  41  * or in date(1) format (-T d was specified).
  42  */
  43 void
  44 print_timestamp(uint_t timestamp_fmt)
  45 {
  46         time_t t = time(NULL);
  47         static const char *fmt = NULL;
  48
  49         /* We only need to retrieve this once per invocation */
  50         if (fmt == NULL)
  51                 fmt = nl_langinfo(_DATE_FMT);
  52
  53         if (timestamp_fmt == UDATE) {
  54                 (void) printf("%lld\n", (longlong_t)t);
  55         } else if (timestamp_fmt == DDATE) {
  56                 char dstr[64];
  57                 struct tm tm;
  58                 int len;
  59
  60                 len = strftime(dstr, sizeof (dstr), fmt, localtime_r(&t, &tm));
  61                 if (len > 0)
  62                         (void) printf("%s\n", dstr);
  63         }
  64 }
  65
  66 /*
  67  * Return timestamp as decimal reprentation (in string) of time_t
  68  * value (-T u was specified) or in date(1) format (-T d was specified).
  69  */
  70 void
  71 get_timestamp(uint_t timestamp_fmt, char *buf, int len)
  72 {
  73         time_t t = time(NULL);
  74         static const char *fmt = NULL;
  75
  76         /* We only need to retrieve this once per invocation */
  77         if (fmt == NULL)
  78                 fmt = nl_langinfo(_DATE_FMT);
  79
  80         if (timestamp_fmt == UDATE) {
  81                 (void) snprintf(buf, len, "%lld", (longlong_t)t);
  82         } else if (timestamp_fmt == DDATE) {
  83                 struct tm tm;
  84                 strftime(buf, len, fmt, localtime_r(&t, &tm));
  85         }
  86 }
  87
  88 /*
  89  * Format the provided time stamp to human readable format
  90  */
  91 void
  92 format_timestamp(time_t t, char *buf, int len)
  93 {
  94         struct tm tm;
  95         static const char *fmt = NULL;
  96
  97         if (t == 0) {
  98                 snprintf(buf, len, "-");
  99                 return;
 100         }
 101
 102         /* We only need to retrieve this once per invocation */
 103         if (fmt == NULL)
 104                 fmt = nl_langinfo(_DATE_FMT);
 105         strftime(buf, len, fmt, localtime_r(&t, &tm));
 106 }