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 static char* strftime_fmt(char *buf, unsigned len, time_t *tp, const char *fmt)
197 /* Returns pointer to NUL */
198 return buf + strftime(buf, len, fmt, localtime(tp));
201 char* FAST_FUNC strftime_HHMMSS(char *buf, unsigned len, time_t *tp)
203 return strftime_fmt(buf, len, tp, "%H:%M:%S");
206 char* FAST_FUNC strftime_YYYYMMDDHHMMSS(char *buf, unsigned len, time_t *tp)
208 return strftime_fmt(buf, len, tp, "%Y-%m-%d %H:%M:%S");
211 #if ENABLE_MONOTONIC_SYSCALL
213 #include <sys/syscall.h>
214 /* Old glibc (< 2.3.4) does not provide this constant. We use syscall
215 * directly so this definition is safe. */
216 #ifndef CLOCK_MONOTONIC
217 #define CLOCK_MONOTONIC 1
220 /* libc has incredibly messy way of doing this,
221 * typically requiring -lrt. We just skip all this mess */
222 static void get_mono(struct timespec *ts)
224 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts))
225 bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
227 unsigned long long FAST_FUNC monotonic_ns(void)
231 return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
233 unsigned long long FAST_FUNC monotonic_us(void)
237 return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
239 unsigned long long FAST_FUNC monotonic_ms(void)
243 return ts.tv_sec * 1000ULL + ts.tv_nsec/1000000;
245 unsigned FAST_FUNC monotonic_sec(void)
254 unsigned long long FAST_FUNC monotonic_ns(void)
257 gettimeofday(&tv, NULL);
258 return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
260 unsigned long long FAST_FUNC monotonic_us(void)
263 gettimeofday(&tv, NULL);
264 return tv.tv_sec * 1000000ULL + tv.tv_usec;
266 unsigned long long FAST_FUNC monotonic_ms(void)
269 gettimeofday(&tv, NULL);
270 return tv.tv_sec * 1000ULL + tv.tv_usec / 1000;
272 unsigned FAST_FUNC monotonic_sec(void)