2 * collectd - src/utils_time.c
3 * Copyright (C) 2010-2015 Florian octo Forster
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
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9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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21 * DEALINGS IN THE SOFTWARE.
24 * Florian octo Forster <octo at collectd.org>
31 #include "utils_time.h"
33 #ifndef DEFAULT_MOCK_TIME
34 #define DEFAULT_MOCK_TIME 1542455354518929408ULL
38 cdtime_t cdtime_mock = (cdtime_t)MOCK_TIME;
40 cdtime_t cdtime(void) { return cdtime_mock; }
41 #else /* !MOCK_TIME */
42 #if HAVE_CLOCK_GETTIME
43 cdtime_t cdtime(void) /* {{{ */
46 struct timespec ts = {0, 0};
48 status = clock_gettime(CLOCK_REALTIME, &ts);
51 ERROR("cdtime: clock_gettime failed: %s",
52 sstrerror(errno, errbuf, sizeof(errbuf)));
56 return (TIMESPEC_TO_CDTIME_T(&ts));
57 } /* }}} cdtime_t cdtime */
58 #else /* !HAVE_CLOCK_GETTIME */
59 /* Work around for Mac OS X which doesn't have clock_gettime(2). *sigh* */
60 cdtime_t cdtime(void) /* {{{ */
63 struct timeval tv = {0, 0};
65 status = gettimeofday(&tv, /* struct timezone = */ NULL);
68 ERROR("cdtime: gettimeofday failed: %s",
69 sstrerror(errno, errbuf, sizeof(errbuf)));
73 return (TIMEVAL_TO_CDTIME_T(&tv));
74 } /* }}} cdtime_t cdtime */
78 /* format_zone reads time zone information from "extern long timezone", exported
79 * by <time.h>, and formats it according to RFC 3339. This differs from
80 * strftime()'s "%z" format by including a colon between hour and minute. */
81 static int format_zone(char *buffer, size_t buffer_size,
82 struct tm const *tm) /* {{{ */
87 if ((buffer == NULL) || (buffer_size < 7))
90 sz = strftime(tmp, sizeof(tmp), "%z", tm);
94 DEBUG("format_zone: strftime(\"%%z\") = \"%s\", want \"+hhmm\"", tmp);
95 sstrncpy(buffer, tmp, buffer_size);
108 } /* }}} int format_zone */
110 static int format_rfc3339(char *buffer, size_t buffer_size, cdtime_t t,
111 _Bool print_nano) /* {{{ */
113 struct timespec t_spec;
115 char base[20]; /* 2006-01-02T15:04:05 */
116 char nano[11]; /* .999999999 */
117 char zone[7]; /* +00:00 */
118 char *fields[] = {base, nano, zone};
122 CDTIME_T_TO_TIMESPEC(t, &t_spec);
123 NORMALIZE_TIMESPEC(t_spec);
125 if (localtime_r(&t_spec.tv_sec, &t_tm) == NULL) {
128 ERROR("format_rfc3339: localtime_r failed: %s",
129 sstrerror(status, errbuf, sizeof(errbuf)));
133 len = strftime(base, sizeof(base), "%Y-%m-%dT%H:%M:%S", &t_tm);
138 ssnprintf(nano, sizeof(nano), ".%09ld", (long)t_spec.tv_nsec);
140 sstrncpy(nano, "", sizeof(nano));
142 status = format_zone(zone, sizeof(zone), &t_tm);
146 if (strjoin(buffer, buffer_size, fields, STATIC_ARRAY_SIZE(fields), "") < 0)
149 } /* }}} int format_rfc3339 */
151 int rfc3339(char *buffer, size_t buffer_size, cdtime_t t) /* {{{ */
153 if (buffer_size < RFC3339_SIZE)
156 return format_rfc3339(buffer, buffer_size, t, 0);
157 } /* }}} size_t cdtime_to_rfc3339 */
159 int rfc3339nano(char *buffer, size_t buffer_size, cdtime_t t) /* {{{ */
161 if (buffer_size < RFC3339NANO_SIZE)
164 return format_rfc3339(buffer, buffer_size, t, 1);
165 } /* }}} size_t cdtime_to_rfc3339nano */
167 /* vim: set sw=2 sts=2 et fdm=marker : */