1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) 2007 Denys Vlasenko
7 * Licensed under GPLv2, see file LICENSE in this source tree.
11 void FAST_FUNC
parse_datestr(const char *date_str
, struct tm
*ptm
)
14 const char *last_colon
= strrchr(date_str
, ':');
16 if (last_colon
!= NULL
) {
17 /* Parse input and assign appropriately to ptm */
23 if (sscanf(date_str
, "%u:%u%c",
27 /* no adjustments needed */
30 if (sscanf(date_str
, "%u.%u-%u:%u%c",
31 &ptm
->tm_mon
, &ptm
->tm_mday
,
32 &ptm
->tm_hour
, &ptm
->tm_min
,
34 /* Adjust month from 1-12 to 0-11 */
37 /* yyyy.mm.dd-HH:MM */
38 if (sscanf(date_str
, "%u.%u.%u-%u:%u%c", &ptm
->tm_year
,
39 &ptm
->tm_mon
, &ptm
->tm_mday
,
40 &ptm
->tm_hour
, &ptm
->tm_min
,
42 ptm
->tm_year
-= 1900; /* Adjust years */
43 ptm
->tm_mon
-= 1; /* Adjust month from 1-12 to 0-11 */
45 /* yyyy-mm-dd HH:MM */
46 if (sscanf(date_str
, "%u-%u-%u %u:%u%c", &ptm
->tm_year
,
47 &ptm
->tm_mon
, &ptm
->tm_mday
,
48 &ptm
->tm_hour
, &ptm
->tm_min
,
50 ptm
->tm_year
-= 1900; /* Adjust years */
51 ptm
->tm_mon
-= 1; /* Adjust month from 1-12 to 0-11 */
53 #if ENABLE_DESKTOP /* strptime is BIG: ~1k in uclibc, ~10k in glibc */
54 /* month_name d HH:MM:SS YYYY. Supported by GNU date */
55 if ((endp
= strptime(date_str
, "%b %d %T %Y", ptm
)) != NULL
58 return; /* don't fall through to end == ":" check */
61 //TODO: coreutils 6.9 also accepts "yyyy-mm-dd HH" (no minutes)
63 bb_error_msg_and_die(bb_msg_invalid_date
, date_str
);
67 if (sscanf(last_colon
+ 1, "%u%c", &ptm
->tm_sec
, &end
) == 1)
69 /* else end != NUL and we error out */
71 } else if (date_str
[0] == '@') {
72 time_t t
= bb_strtol(date_str
+ 1, NULL
, 10);
74 struct tm
*lt
= localtime(&t
);
82 /* Googled the following on an old date manpage:
84 * The canonical representation for setting the date/time is:
85 * cc Century (either 19 or 20)
86 * yy Year in abbreviated form (e.g. 89, 06)
87 * mm Numeric month, a number from 1 to 12
88 * dd Day, a number from 1 to 31
89 * HH Hour, a number from 0 to 23
90 * MM Minutes, a number from 0 to 59
91 * .SS Seconds, a number from 0 to 61 (with leap seconds)
92 * Everything but the minutes is optional
94 * "touch -t DATETIME" format: [[[[[YY]YY]MM]DD]hh]mm[.ss]
95 * Some, but not all, Unix "date DATETIME" commands
96 * move [[YY]YY] past minutes mm field (!).
97 * Coreutils date does it, and SUS mandates it.
98 * (date -s DATETIME does not support this format. lovely!)
99 * In bbox, this format is special-cased in date applet
100 * (IOW: this function assumes "touch -t" format).
102 unsigned cur_year
= ptm
->tm_year
;
103 int len
= strchrnul(date_str
, '.') - date_str
;
106 if (len
== 2 && sscanf(date_str
, "%2u%2u%2u%2u""%2u%c" + 12,
111 if (len
== 4 && sscanf(date_str
, "%2u%2u%2u""%2u%2u%c" + 9,
117 if (len
== 6 && sscanf(date_str
, "%2u%2u""%2u%2u%2u%c" + 6,
124 if (len
== 8 && sscanf(date_str
, "%2u""%2u%2u%2u%2u%c" + 3,
130 /* Adjust month from 1-12 to 0-11 */
133 /* yymmddHHMM[.SS] */
134 if (len
== 10 && sscanf(date_str
, "%2u%2u%2u%2u%2u%c",
141 /* Adjust month from 1-12 to 0-11 */
143 if ((int)cur_year
>= 50) { /* >= 1950 */
145 /* 1. Put it in the current century */
146 ptm
->tm_year
+= (cur_year
/ 100) * 100;
147 /* 2. If too far in the past, +100 years */
148 if (ptm
->tm_year
< cur_year
- 50)
150 /* 3. If too far in the future, -100 years */
151 if (ptm
->tm_year
> cur_year
+ 50)
155 /* ccyymmddHHMM[.SS] */
156 if (len
== 12 && sscanf(date_str
, "%4u%2u%2u%2u%2u%c",
163 ptm
->tm_year
-= 1900; /* Adjust years */
164 ptm
->tm_mon
-= 1; /* Adjust month from 1-12 to 0-11 */
166 bb_error_msg_and_die(bb_msg_invalid_date
, date_str
);
170 if (sscanf(strchr(date_str
, '.') + 1, "%u%c",
171 &ptm
->tm_sec
, &end
) == 1)
173 /* else end != NUL and we error out */
177 bb_error_msg_and_die(bb_msg_invalid_date
, date_str
);
181 time_t FAST_FUNC
validate_tm_time(const char *date_str
, struct tm
*ptm
)
183 time_t t
= mktime(ptm
);
184 if (t
== (time_t) -1L) {
185 bb_error_msg_and_die(bb_msg_invalid_date
, date_str
);
190 #if ENABLE_MONOTONIC_SYSCALL
192 #include <sys/syscall.h>
193 /* Old glibc (< 2.3.4) does not provide this constant. We use syscall
194 * directly so this definition is safe. */
195 #ifndef CLOCK_MONOTONIC
196 #define CLOCK_MONOTONIC 1
199 /* libc has incredibly messy way of doing this,
200 * typically requiring -lrt. We just skip all this mess */
201 static void get_mono(struct timespec
*ts
)
203 if (syscall(__NR_clock_gettime
, CLOCK_MONOTONIC
, ts
))
204 bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
206 unsigned long long FAST_FUNC
monotonic_ns(void)
210 return ts
.tv_sec
* 1000000000ULL + ts
.tv_nsec
;
212 unsigned long long FAST_FUNC
monotonic_us(void)
216 return ts
.tv_sec
* 1000000ULL + ts
.tv_nsec
/1000;
218 unsigned long long FAST_FUNC
monotonic_ms(void)
222 return ts
.tv_sec
* 1000ULL + ts
.tv_nsec
/1000000;
224 unsigned FAST_FUNC
monotonic_sec(void)
233 unsigned long long FAST_FUNC
monotonic_ns(void)
236 gettimeofday(&tv
, NULL
);
237 return tv
.tv_sec
* 1000000000ULL + tv
.tv_usec
* 1000;
239 unsigned long long FAST_FUNC
monotonic_us(void)
242 gettimeofday(&tv
, NULL
);
243 return tv
.tv_sec
* 1000000ULL + tv
.tv_usec
;
245 unsigned long long FAST_FUNC
monotonic_ms(void)
248 gettimeofday(&tv
, NULL
);
249 return tv
.tv_sec
* 1000ULL + tv
.tv_usec
/ 1000;
251 unsigned FAST_FUNC
monotonic_sec(void)