1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) 2007 Denys Vlasenko
7 * Licensed under GPL version 2, see file LICENSE in this tarball for details.
11 void FAST_FUNC parse_datestr(const char *date_str, struct tm *tm_time)
14 const char *last_colon = strrchr(date_str, ':');
16 if (last_colon != NULL) {
17 /* Parse input and assign appropriately to tm_time */
20 if (sscanf(date_str, "%u:%u%c",
24 /* no adjustments needed */
27 if (sscanf(date_str, "%u.%u-%u:%u%c",
28 &tm_time->tm_mon, &tm_time->tm_mday,
29 &tm_time->tm_hour, &tm_time->tm_min,
31 /* Adjust month from 1-12 to 0-11 */
34 /* yyyy.mm.dd-HH:MM */
35 if (sscanf(date_str, "%u.%u.%u-%u:%u%c", &tm_time->tm_year,
36 &tm_time->tm_mon, &tm_time->tm_mday,
37 &tm_time->tm_hour, &tm_time->tm_min,
39 tm_time->tm_year -= 1900; /* Adjust years */
40 tm_time->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
42 /* yyyy-mm-dd HH:MM */
43 if (sscanf(date_str, "%u-%u-%u %u:%u%c", &tm_time->tm_year,
44 &tm_time->tm_mon, &tm_time->tm_mday,
45 &tm_time->tm_hour, &tm_time->tm_min,
47 tm_time->tm_year -= 1900; /* Adjust years */
48 tm_time->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
49 //TODO: coreutils 6.9 also accepts "yyyy-mm-dd HH" (no minutes)
51 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
55 if (sscanf(last_colon + 1, "%u%c", &tm_time->tm_sec, &end) == 1)
57 /* else end != NUL and we error out */
60 /* Googled the following on an old date manpage:
62 * The canonical representation for setting the date/time is:
63 * cc Century (either 19 or 20)
64 * yy Year in abbreviated form (e.g. 89, 06)
65 * mm Numeric month, a number from 1 to 12
66 * dd Day, a number from 1 to 31
67 * HH Hour, a number from 0 to 23
68 * MM Minutes, a number from 0 to 59
69 * ss Seconds, a number from 0 to 61 (with leap seconds)
70 * Everything but the minutes is optional
72 * This coincides with the format of "touch -t TIME"
74 int len = strchrnul(date_str, '.') - date_str;
77 if (len == 2 && sscanf(date_str, "%2u%2u%2u%2u%2u%c" + 12,
82 if (len == 4 && sscanf(date_str, "%2u%2u%2u%2u%2u%c" + 9,
88 if (len == 6 && sscanf(date_str, "%2u%2u%2u%2u%2u%c" + 6,
95 if (len == 8 && sscanf(date_str, "%2u%2u%2u%2u%2u%c" + 3,
101 /* Adjust month from 1-12 to 0-11 */
102 tm_time->tm_mon -= 1;
104 /* yymmddHHMM[.SS] */
105 if (len == 10 && sscanf(date_str, "%2u%2u%2u%2u%2u%c",
112 /* Adjust month from 1-12 to 0-11 */
113 tm_time->tm_mon -= 1;
115 /* yyyymmddHHMM[.SS] */
116 if (len == 12 && sscanf(date_str, "%4u%2u%2u%2u%2u%c",
123 tm_time->tm_year -= 1900; /* Adjust years */
124 tm_time->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
126 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
130 if (sscanf(strchr(date_str, '.') + 1, "%u%c",
131 &tm_time->tm_sec, &end) == 1)
133 /* else end != NUL and we error out */
137 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
141 time_t FAST_FUNC validate_tm_time(const char *date_str, struct tm *tm_time)
143 time_t t = mktime(tm_time);
144 if (t == (time_t) -1L) {
145 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
150 #if ENABLE_MONOTONIC_SYSCALL
152 #include <sys/syscall.h>
153 /* Old glibc (< 2.3.4) does not provide this constant. We use syscall
154 * directly so this definition is safe. */
155 #ifndef CLOCK_MONOTONIC
156 #define CLOCK_MONOTONIC 1
159 /* libc has incredibly messy way of doing this,
160 * typically requiring -lrt. We just skip all this mess */
161 static void get_mono(struct timespec *ts)
163 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts))
164 bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
166 unsigned long long FAST_FUNC monotonic_ns(void)
170 return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
172 unsigned long long FAST_FUNC monotonic_us(void)
176 return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
178 unsigned FAST_FUNC monotonic_sec(void)
187 unsigned long long FAST_FUNC monotonic_ns(void)
190 gettimeofday(&tv, NULL);
191 return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
193 unsigned long long FAST_FUNC monotonic_us(void)
196 gettimeofday(&tv, NULL);
197 return tv.tv_sec * 1000000ULL + tv.tv_usec;
199 unsigned FAST_FUNC monotonic_sec(void)