[1765] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Utility routines.
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| 4 | *
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[2725] | 5 | * Copyright (C) 2007 Denys Vlasenko
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[1765] | 6 | *
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[2725] | 7 | * Licensed under GPLv2, see file LICENSE in this source tree.
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[1765] | 8 | */
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| 9 | #include "libbb.h"
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| 10 |
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[2725] | 11 | void FAST_FUNC parse_datestr(const char *date_str, struct tm *ptm)
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| 12 | {
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| 13 | char end = '\0';
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| 14 | const char *last_colon = strrchr(date_str, ':');
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| 15 |
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| 16 | if (last_colon != NULL) {
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| 17 | /* Parse input and assign appropriately to ptm */
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| 18 | #if ENABLE_DESKTOP
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| 19 | const char *endp;
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| 20 | #endif
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| 21 |
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| 22 | /* HH:MM */
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| 23 | if (sscanf(date_str, "%u:%u%c",
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| 24 | &ptm->tm_hour,
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| 25 | &ptm->tm_min,
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[3621] | 26 | &end) >= 2
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| 27 | ) {
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[2725] | 28 | /* no adjustments needed */
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| 29 | } else
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| 30 | /* mm.dd-HH:MM */
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| 31 | if (sscanf(date_str, "%u.%u-%u:%u%c",
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| 32 | &ptm->tm_mon, &ptm->tm_mday,
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| 33 | &ptm->tm_hour, &ptm->tm_min,
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[3621] | 34 | &end) >= 4
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| 35 | ) {
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[2725] | 36 | /* Adjust month from 1-12 to 0-11 */
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| 37 | ptm->tm_mon -= 1;
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| 38 | } else
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| 39 | /* yyyy.mm.dd-HH:MM */
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| 40 | if (sscanf(date_str, "%u.%u.%u-%u:%u%c", &ptm->tm_year,
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| 41 | &ptm->tm_mon, &ptm->tm_mday,
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| 42 | &ptm->tm_hour, &ptm->tm_min,
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[3621] | 43 | &end) >= 5
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[2725] | 44 | /* yyyy-mm-dd HH:MM */
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[3621] | 45 | || sscanf(date_str, "%u-%u-%u %u:%u%c", &ptm->tm_year,
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[2725] | 46 | &ptm->tm_mon, &ptm->tm_mday,
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| 47 | &ptm->tm_hour, &ptm->tm_min,
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[3621] | 48 | &end) >= 5
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| 49 | ) {
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[2725] | 50 | ptm->tm_year -= 1900; /* Adjust years */
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| 51 | ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
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| 52 | } else
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| 53 | #if ENABLE_DESKTOP /* strptime is BIG: ~1k in uclibc, ~10k in glibc */
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| 54 | /* month_name d HH:MM:SS YYYY. Supported by GNU date */
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| 55 | if ((endp = strptime(date_str, "%b %d %T %Y", ptm)) != NULL
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| 56 | && *endp == '\0'
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| 57 | ) {
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| 58 | return; /* don't fall through to end == ":" check */
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| 59 | } else
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| 60 | #endif
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| 61 | {
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| 62 | bb_error_msg_and_die(bb_msg_invalid_date, date_str);
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| 63 | }
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| 64 | if (end == ':') {
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| 65 | /* xxx:SS */
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| 66 | if (sscanf(last_colon + 1, "%u%c", &ptm->tm_sec, &end) == 1)
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| 67 | end = '\0';
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| 68 | /* else end != NUL and we error out */
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| 69 | }
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[3621] | 70 | } else
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| 71 | if (strchr(date_str, '-')
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| 72 | /* Why strchr('-') check?
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| 73 | * sscanf below will trash ptm->tm_year, this breaks
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| 74 | * if parse_str is "10101010" (iow, "MMddhhmm" form)
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| 75 | * because we destroy year. Do these sscanf
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| 76 | * only if we saw a dash in parse_str.
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| 77 | */
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| 78 | /* yyyy-mm-dd HH */
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| 79 | && (sscanf(date_str, "%u-%u-%u %u%c", &ptm->tm_year,
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| 80 | &ptm->tm_mon, &ptm->tm_mday,
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| 81 | &ptm->tm_hour,
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| 82 | &end) >= 4
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| 83 | /* yyyy-mm-dd */
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| 84 | || sscanf(date_str, "%u-%u-%u%c", &ptm->tm_year,
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| 85 | &ptm->tm_mon, &ptm->tm_mday,
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| 86 | &end) >= 3
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| 87 | )
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| 88 | ) {
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| 89 | ptm->tm_year -= 1900; /* Adjust years */
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| 90 | ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
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| 91 | } else
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| 92 | if (date_str[0] == '@') {
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[2725] | 93 | time_t t = bb_strtol(date_str + 1, NULL, 10);
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| 94 | if (!errno) {
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| 95 | struct tm *lt = localtime(&t);
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| 96 | if (lt) {
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| 97 | *ptm = *lt;
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| 98 | return;
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| 99 | }
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| 100 | }
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| 101 | end = '1';
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| 102 | } else {
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| 103 | /* Googled the following on an old date manpage:
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| 104 | *
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| 105 | * The canonical representation for setting the date/time is:
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| 106 | * cc Century (either 19 or 20)
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| 107 | * yy Year in abbreviated form (e.g. 89, 06)
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| 108 | * mm Numeric month, a number from 1 to 12
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| 109 | * dd Day, a number from 1 to 31
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| 110 | * HH Hour, a number from 0 to 23
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| 111 | * MM Minutes, a number from 0 to 59
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| 112 | * .SS Seconds, a number from 0 to 61 (with leap seconds)
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| 113 | * Everything but the minutes is optional
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| 114 | *
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[3232] | 115 | * "touch -t DATETIME" format: [[[[[YY]YY]MM]DD]hh]mm[.ss]
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| 116 | * Some, but not all, Unix "date DATETIME" commands
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| 117 | * move [[YY]YY] past minutes mm field (!).
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| 118 | * Coreutils date does it, and SUS mandates it.
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| 119 | * (date -s DATETIME does not support this format. lovely!)
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| 120 | * In bbox, this format is special-cased in date applet
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| 121 | * (IOW: this function assumes "touch -t" format).
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[2725] | 122 | */
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[3232] | 123 | unsigned cur_year = ptm->tm_year;
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[2725] | 124 | int len = strchrnul(date_str, '.') - date_str;
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| 125 |
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| 126 | /* MM[.SS] */
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| 127 | if (len == 2 && sscanf(date_str, "%2u%2u%2u%2u""%2u%c" + 12,
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| 128 | &ptm->tm_min,
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| 129 | &end) >= 1) {
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| 130 | } else
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| 131 | /* HHMM[.SS] */
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| 132 | if (len == 4 && sscanf(date_str, "%2u%2u%2u""%2u%2u%c" + 9,
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| 133 | &ptm->tm_hour,
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| 134 | &ptm->tm_min,
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| 135 | &end) >= 2) {
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| 136 | } else
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| 137 | /* ddHHMM[.SS] */
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| 138 | if (len == 6 && sscanf(date_str, "%2u%2u""%2u%2u%2u%c" + 6,
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| 139 | &ptm->tm_mday,
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| 140 | &ptm->tm_hour,
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| 141 | &ptm->tm_min,
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| 142 | &end) >= 3) {
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| 143 | } else
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| 144 | /* mmddHHMM[.SS] */
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| 145 | if (len == 8 && sscanf(date_str, "%2u""%2u%2u%2u%2u%c" + 3,
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| 146 | &ptm->tm_mon,
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| 147 | &ptm->tm_mday,
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| 148 | &ptm->tm_hour,
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| 149 | &ptm->tm_min,
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| 150 | &end) >= 4) {
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| 151 | /* Adjust month from 1-12 to 0-11 */
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| 152 | ptm->tm_mon -= 1;
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| 153 | } else
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| 154 | /* yymmddHHMM[.SS] */
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| 155 | if (len == 10 && sscanf(date_str, "%2u%2u%2u%2u%2u%c",
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| 156 | &ptm->tm_year,
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| 157 | &ptm->tm_mon,
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| 158 | &ptm->tm_mday,
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| 159 | &ptm->tm_hour,
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| 160 | &ptm->tm_min,
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| 161 | &end) >= 5) {
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| 162 | /* Adjust month from 1-12 to 0-11 */
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| 163 | ptm->tm_mon -= 1;
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[3232] | 164 | if ((int)cur_year >= 50) { /* >= 1950 */
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| 165 | /* Adjust year: */
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| 166 | /* 1. Put it in the current century */
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| 167 | ptm->tm_year += (cur_year / 100) * 100;
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| 168 | /* 2. If too far in the past, +100 years */
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| 169 | if (ptm->tm_year < cur_year - 50)
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| 170 | ptm->tm_year += 100;
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| 171 | /* 3. If too far in the future, -100 years */
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| 172 | if (ptm->tm_year > cur_year + 50)
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| 173 | ptm->tm_year -= 100;
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| 174 | }
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[2725] | 175 | } else
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| 176 | /* ccyymmddHHMM[.SS] */
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| 177 | if (len == 12 && sscanf(date_str, "%4u%2u%2u%2u%2u%c",
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| 178 | &ptm->tm_year,
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| 179 | &ptm->tm_mon,
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| 180 | &ptm->tm_mday,
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| 181 | &ptm->tm_hour,
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| 182 | &ptm->tm_min,
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| 183 | &end) >= 5) {
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| 184 | ptm->tm_year -= 1900; /* Adjust years */
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| 185 | ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
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| 186 | } else {
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| 187 | bb_error_msg_and_die(bb_msg_invalid_date, date_str);
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| 188 | }
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[3621] | 189 | ptm->tm_sec = 0; /* assume zero if [.SS] is not given */
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[2725] | 190 | if (end == '.') {
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| 191 | /* xxx.SS */
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| 192 | if (sscanf(strchr(date_str, '.') + 1, "%u%c",
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| 193 | &ptm->tm_sec, &end) == 1)
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| 194 | end = '\0';
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| 195 | /* else end != NUL and we error out */
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| 196 | }
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| 197 | }
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| 198 | if (end != '\0') {
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| 199 | bb_error_msg_and_die(bb_msg_invalid_date, date_str);
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| 200 | }
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| 201 | }
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| 202 |
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| 203 | time_t FAST_FUNC validate_tm_time(const char *date_str, struct tm *ptm)
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| 204 | {
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| 205 | time_t t = mktime(ptm);
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| 206 | if (t == (time_t) -1L) {
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| 207 | bb_error_msg_and_die(bb_msg_invalid_date, date_str);
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| 208 | }
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| 209 | return t;
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| 210 | }
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| 211 |
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[3621] | 212 | static char* strftime_fmt(char *buf, unsigned len, time_t *tp, const char *fmt)
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| 213 | {
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| 214 | time_t t;
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| 215 | if (!tp) {
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| 216 | tp = &t;
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| 217 | time(tp);
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| 218 | }
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| 219 | /* Returns pointer to NUL */
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| 220 | return buf + strftime(buf, len, fmt, localtime(tp));
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| 221 | }
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| 222 |
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| 223 | char* FAST_FUNC strftime_HHMMSS(char *buf, unsigned len, time_t *tp)
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| 224 | {
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| 225 | return strftime_fmt(buf, len, tp, "%H:%M:%S");
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| 226 | }
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| 227 |
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| 228 | char* FAST_FUNC strftime_YYYYMMDDHHMMSS(char *buf, unsigned len, time_t *tp)
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| 229 | {
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| 230 | return strftime_fmt(buf, len, tp, "%Y-%m-%d %H:%M:%S");
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| 231 | }
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| 232 |
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[1765] | 233 | #if ENABLE_MONOTONIC_SYSCALL
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[2725] | 234 |
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[1765] | 235 | #include <sys/syscall.h>
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[2725] | 236 | /* Old glibc (< 2.3.4) does not provide this constant. We use syscall
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| 237 | * directly so this definition is safe. */
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| 238 | #ifndef CLOCK_MONOTONIC
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| 239 | #define CLOCK_MONOTONIC 1
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| 240 | #endif
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[1765] | 241 |
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| 242 | /* libc has incredibly messy way of doing this,
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| 243 | * typically requiring -lrt. We just skip all this mess */
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[2725] | 244 | static void get_mono(struct timespec *ts)
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[1765] | 245 | {
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[2725] | 246 | if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts))
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| 247 | bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
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| 248 | }
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| 249 | unsigned long long FAST_FUNC monotonic_ns(void)
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| 250 | {
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[1765] | 251 | struct timespec ts;
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[2725] | 252 | get_mono(&ts);
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| 253 | return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
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| 254 | }
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| 255 | unsigned long long FAST_FUNC monotonic_us(void)
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| 256 | {
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| 257 | struct timespec ts;
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| 258 | get_mono(&ts);
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[1765] | 259 | return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
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| 260 | }
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[2725] | 261 | unsigned long long FAST_FUNC monotonic_ms(void)
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[1765] | 262 | {
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| 263 | struct timespec ts;
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[2725] | 264 | get_mono(&ts);
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| 265 | return ts.tv_sec * 1000ULL + ts.tv_nsec/1000000;
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| 266 | }
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| 267 | unsigned FAST_FUNC monotonic_sec(void)
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| 268 | {
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| 269 | struct timespec ts;
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| 270 | get_mono(&ts);
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[1765] | 271 | return ts.tv_sec;
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| 272 | }
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[2725] | 273 |
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[1765] | 274 | #else
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[2725] | 275 |
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| 276 | unsigned long long FAST_FUNC monotonic_ns(void)
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[1765] | 277 | {
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| 278 | struct timeval tv;
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| 279 | gettimeofday(&tv, NULL);
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[2725] | 280 | return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
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| 281 | }
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| 282 | unsigned long long FAST_FUNC monotonic_us(void)
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| 283 | {
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| 284 | struct timeval tv;
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| 285 | gettimeofday(&tv, NULL);
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[1765] | 286 | return tv.tv_sec * 1000000ULL + tv.tv_usec;
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| 287 | }
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[2725] | 288 | unsigned long long FAST_FUNC monotonic_ms(void)
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[1765] | 289 | {
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[2725] | 290 | struct timeval tv;
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| 291 | gettimeofday(&tv, NULL);
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| 292 | return tv.tv_sec * 1000ULL + tv.tv_usec / 1000;
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| 293 | }
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| 294 | unsigned FAST_FUNC monotonic_sec(void)
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| 295 | {
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[1765] | 296 | return time(NULL);
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| 297 | }
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[2725] | 298 |
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[1765] | 299 | #endif
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