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",
28 /* no adjustments needed */
31 if (sscanf(date_str, "%u.%u-%u:%u%c",
32 &ptm->tm_mon, &ptm->tm_mday,
33 &ptm->tm_hour, &ptm->tm_min,
36 /* Adjust month from 1-12 to 0-11 */
39 /* yyyy.mm.dd-HH:MM */
40 if (sscanf(date_str, "%u.%u.%u-%u:%u%c", &ptm->tm_year,
41 &ptm->tm_mon, &ptm->tm_mday,
42 &ptm->tm_hour, &ptm->tm_min,
44 /* yyyy-mm-dd HH:MM */
45 || sscanf(date_str, "%u-%u-%u %u:%u%c", &ptm->tm_year,
46 &ptm->tm_mon, &ptm->tm_mday,
47 &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 */
62 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
66 if (sscanf(last_colon + 1, "%u%c", &ptm->tm_sec, &end) == 1)
68 /* else end != NUL and we error out */
71 if (strchr(date_str, '-')
72 /* Why strchr('-') check?
73 * sscanf below will trash ptm->tm_year, this breaks
74 * if parse_str is "10101010" (iow, "MMddhhmm" form)
75 * because we destroy year. Do these sscanf
76 * only if we saw a dash in parse_str.
79 && (sscanf(date_str, "%u-%u-%u %u%c", &ptm->tm_year,
80 &ptm->tm_mon, &ptm->tm_mday,
84 || sscanf(date_str, "%u-%u-%u%c", &ptm->tm_year,
85 &ptm->tm_mon, &ptm->tm_mday,
89 ptm->tm_year -= 1900; /* Adjust years */
90 ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
92 if (date_str[0] == '@') {
93 time_t t = bb_strtol(date_str + 1, NULL, 10);
95 struct tm *lt = localtime(&t);
103 /* Googled the following on an old date manpage:
105 * The canonical representation for setting the date/time is:
106 * cc Century (either 19 or 20)
107 * yy Year in abbreviated form (e.g. 89, 06)
108 * mm Numeric month, a number from 1 to 12
109 * dd Day, a number from 1 to 31
110 * HH Hour, a number from 0 to 23
111 * MM Minutes, a number from 0 to 59
112 * .SS Seconds, a number from 0 to 61 (with leap seconds)
113 * Everything but the minutes is optional
115 * "touch -t DATETIME" format: [[[[[YY]YY]MM]DD]hh]mm[.ss]
116 * Some, but not all, Unix "date DATETIME" commands
117 * move [[YY]YY] past minutes mm field (!).
118 * Coreutils date does it, and SUS mandates it.
119 * (date -s DATETIME does not support this format. lovely!)
120 * In bbox, this format is special-cased in date applet
121 * (IOW: this function assumes "touch -t" format).
123 unsigned cur_year = ptm->tm_year;
124 int len = strchrnul(date_str, '.') - date_str;
127 if (len == 2 && sscanf(date_str, "%2u%2u%2u%2u""%2u%c" + 12,
132 if (len == 4 && sscanf(date_str, "%2u%2u%2u""%2u%2u%c" + 9,
138 if (len == 6 && sscanf(date_str, "%2u%2u""%2u%2u%2u%c" + 6,
145 if (len == 8 && sscanf(date_str, "%2u""%2u%2u%2u%2u%c" + 3,
151 /* Adjust month from 1-12 to 0-11 */
154 /* yymmddHHMM[.SS] */
155 if (len == 10 && sscanf(date_str, "%2u%2u%2u%2u%2u%c",
162 /* Adjust month from 1-12 to 0-11 */
164 if ((int)cur_year >= 50) { /* >= 1950 */
166 /* 1. Put it in the current century */
167 ptm->tm_year += (cur_year / 100) * 100;
168 /* 2. If too far in the past, +100 years */
169 if (ptm->tm_year < cur_year - 50)
171 /* 3. If too far in the future, -100 years */
172 if (ptm->tm_year > cur_year + 50)
176 /* ccyymmddHHMM[.SS] */
177 if (len == 12 && sscanf(date_str, "%4u%2u%2u%2u%2u%c",
184 ptm->tm_year -= 1900; /* Adjust years */
185 ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
188 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
190 ptm->tm_sec = 0; /* assume zero if [.SS] is not given */
193 if (sscanf(strchr(date_str, '.') + 1, "%u%c",
194 &ptm->tm_sec, &end) == 1)
196 /* else end != NUL and we error out */
198 /* Users were confused by "date -s 20180923"
199 * working (not in the way they were expecting).
200 * It was interpreted as MMDDhhmm, and not bothered by
201 * "month #20" in the least. Prevent such cases:
203 if (ptm->tm_sec > 60 /* allow "23:60" leap second */
207 || ptm->tm_mon > 11 /* month# is 0..11, not 1..12 */
213 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
217 time_t FAST_FUNC validate_tm_time(const char *date_str, struct tm *ptm)
219 time_t t = mktime(ptm);
220 if (t == (time_t) -1L) {
221 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
226 static char* strftime_fmt(char *buf, unsigned len, time_t *tp, const char *fmt)
233 /* Returns pointer to NUL */
234 return buf + strftime(buf, len, fmt, localtime(tp));
237 char* FAST_FUNC strftime_HHMMSS(char *buf, unsigned len, time_t *tp)
239 return strftime_fmt(buf, len, tp, "%H:%M:%S");
242 char* FAST_FUNC strftime_YYYYMMDDHHMMSS(char *buf, unsigned len, time_t *tp)
244 return strftime_fmt(buf, len, tp, "%Y-%m-%d %H:%M:%S");
247 #if ENABLE_MONOTONIC_SYSCALL
249 #include <sys/syscall.h>
250 /* Old glibc (< 2.3.4) does not provide this constant. We use syscall
251 * directly so this definition is safe. */
252 #ifndef CLOCK_MONOTONIC
253 #define CLOCK_MONOTONIC 1
256 /* libc has incredibly messy way of doing this,
257 * typically requiring -lrt. We just skip all this mess */
258 static void get_mono(struct timespec *ts)
260 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts))
261 bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
263 unsigned long long FAST_FUNC monotonic_ns(void)
267 return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
269 unsigned long long FAST_FUNC monotonic_us(void)
273 return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
275 unsigned long long FAST_FUNC monotonic_ms(void)
279 return ts.tv_sec * 1000ULL + ts.tv_nsec/1000000;
281 unsigned FAST_FUNC monotonic_sec(void)
290 unsigned long long FAST_FUNC monotonic_ns(void)
293 gettimeofday(&tv, NULL);
294 return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
296 unsigned long long FAST_FUNC monotonic_us(void)
299 gettimeofday(&tv, NULL);
300 return tv.tv_sec * 1000000ULL + tv.tv_usec;
302 unsigned long long FAST_FUNC monotonic_ms(void)
305 gettimeofday(&tv, NULL);
306 return tv.tv_sec * 1000ULL + tv.tv_usec / 1000;
308 unsigned FAST_FUNC monotonic_sec(void)