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 */
19 if (sscanf(date_str, "%u:%u%c",
23 /* no adjustments needed */
24 } else if (sscanf(date_str, "%u.%u-%u:%u%c",
25 &tm_time->tm_mon, &tm_time->tm_mday,
26 &tm_time->tm_hour, &tm_time->tm_min,
28 /* Adjust dates from 1-12 to 0-11 */
30 } else if (sscanf(date_str, "%u.%u.%u-%u:%u%c", &tm_time->tm_year,
31 &tm_time->tm_mon, &tm_time->tm_mday,
32 &tm_time->tm_hour, &tm_time->tm_min,
34 tm_time->tm_year -= 1900; /* Adjust years */
35 tm_time->tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
36 } else if (sscanf(date_str, "%u-%u-%u %u:%u%c", &tm_time->tm_year,
37 &tm_time->tm_mon, &tm_time->tm_mday,
38 &tm_time->tm_hour, &tm_time->tm_min,
40 tm_time->tm_year -= 1900; /* Adjust years */
41 tm_time->tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
42 //TODO: coreutils 6.9 also accepts "YYYY-MM-DD HH" (no minutes)
44 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
47 if (sscanf(last_colon + 1, "%u%c", &tm_time->tm_sec, &end) == 1)
49 /* else end != NUL and we error out */
52 if (sscanf(date_str, "%2u%2u%2u%2u%u%c", &tm_time->tm_mon,
53 &tm_time->tm_mday, &tm_time->tm_hour, &tm_time->tm_min,
54 &tm_time->tm_year, &end) < 4)
55 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
56 /* correct for century - minor Y2K problem here? */
57 if (tm_time->tm_year >= 1900) {
58 tm_time->tm_year -= 1900;
63 if (sscanf(strchr(date_str, '.') + 1, "%u%c",
64 &tm_time->tm_sec, &end) == 1)
66 /* else end != NUL and we error out */
70 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
74 time_t FAST_FUNC validate_tm_time(const char *date_str, struct tm *tm_time)
76 time_t t = mktime(tm_time);
77 if (t == (time_t) -1L) {
78 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
83 #if ENABLE_MONOTONIC_SYSCALL
85 #include <sys/syscall.h>
86 /* Old glibc (< 2.3.4) does not provide this constant. We use syscall
87 * directly so this definition is safe. */
88 #ifndef CLOCK_MONOTONIC
89 #define CLOCK_MONOTONIC 1
92 /* libc has incredibly messy way of doing this,
93 * typically requiring -lrt. We just skip all this mess */
94 static void get_mono(struct timespec *ts)
96 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts))
97 bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
99 unsigned long long FAST_FUNC monotonic_ns(void)
103 return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
105 unsigned long long FAST_FUNC monotonic_us(void)
109 return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
111 unsigned FAST_FUNC monotonic_sec(void)
120 unsigned long long FAST_FUNC monotonic_ns(void)
123 gettimeofday(&tv, NULL);
124 return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
126 unsigned long long FAST_FUNC monotonic_us(void)
129 gettimeofday(&tv, NULL);
130 return tv.tv_sec * 1000000ULL + tv.tv_usec;
132 unsigned FAST_FUNC monotonic_sec(void)