[3320] | 1 | /* vi: set sw=4 ts=4: */
|
---|
| 2 | /*
|
---|
| 3 | * Utility routines.
|
---|
| 4 | *
|
---|
| 5 | * Copyright (C) 2007 Denys Vlasenko
|
---|
| 6 | *
|
---|
| 7 | * Licensed under GPLv2, see file LICENSE in this source tree.
|
---|
| 8 | */
|
---|
| 9 | #include "libbb.h"
|
---|
| 10 |
|
---|
| 11 | void FAST_FUNC parse_datestr(const char *date_str, struct tm *ptm)
|
---|
| 12 | {
|
---|
| 13 | char end = '\0';
|
---|
| 14 | const char *last_colon = strrchr(date_str, ':');
|
---|
| 15 |
|
---|
| 16 | if (last_colon != NULL) {
|
---|
| 17 | /* Parse input and assign appropriately to ptm */
|
---|
| 18 | #if ENABLE_DESKTOP
|
---|
| 19 | const char *endp;
|
---|
| 20 | #endif
|
---|
| 21 |
|
---|
| 22 | /* HH:MM */
|
---|
| 23 | if (sscanf(date_str, "%u:%u%c",
|
---|
| 24 | &ptm->tm_hour,
|
---|
| 25 | &ptm->tm_min,
|
---|
| 26 | &end) >= 2) {
|
---|
| 27 | /* no adjustments needed */
|
---|
| 28 | } else
|
---|
| 29 | /* mm.dd-HH:MM */
|
---|
| 30 | if (sscanf(date_str, "%u.%u-%u:%u%c",
|
---|
| 31 | &ptm->tm_mon, &ptm->tm_mday,
|
---|
| 32 | &ptm->tm_hour, &ptm->tm_min,
|
---|
| 33 | &end) >= 4) {
|
---|
| 34 | /* Adjust month from 1-12 to 0-11 */
|
---|
| 35 | ptm->tm_mon -= 1;
|
---|
| 36 | } else
|
---|
| 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,
|
---|
| 41 | &end) >= 5) {
|
---|
| 42 | ptm->tm_year -= 1900; /* Adjust years */
|
---|
| 43 | ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
|
---|
| 44 | } else
|
---|
| 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,
|
---|
| 49 | &end) >= 5) {
|
---|
| 50 | ptm->tm_year -= 1900; /* Adjust years */
|
---|
| 51 | ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
|
---|
| 52 | } else
|
---|
| 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
|
---|
| 56 | && *endp == '\0'
|
---|
| 57 | ) {
|
---|
| 58 | return; /* don't fall through to end == ":" check */
|
---|
| 59 | } else
|
---|
| 60 | #endif
|
---|
| 61 | //TODO: coreutils 6.9 also accepts "yyyy-mm-dd HH" (no minutes)
|
---|
| 62 | {
|
---|
| 63 | bb_error_msg_and_die(bb_msg_invalid_date, date_str);
|
---|
| 64 | }
|
---|
| 65 | if (end == ':') {
|
---|
| 66 | /* xxx:SS */
|
---|
| 67 | if (sscanf(last_colon + 1, "%u%c", &ptm->tm_sec, &end) == 1)
|
---|
| 68 | end = '\0';
|
---|
| 69 | /* else end != NUL and we error out */
|
---|
| 70 | }
|
---|
| 71 | } else if (date_str[0] == '@') {
|
---|
| 72 | time_t t = bb_strtol(date_str + 1, NULL, 10);
|
---|
| 73 | if (!errno) {
|
---|
| 74 | struct tm *lt = localtime(&t);
|
---|
| 75 | if (lt) {
|
---|
| 76 | *ptm = *lt;
|
---|
| 77 | return;
|
---|
| 78 | }
|
---|
| 79 | }
|
---|
| 80 | end = '1';
|
---|
| 81 | } else {
|
---|
| 82 | /* Googled the following on an old date manpage:
|
---|
| 83 | *
|
---|
| 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
|
---|
| 93 | *
|
---|
| 94 | * This coincides with the format of "touch -t TIME"
|
---|
| 95 | */
|
---|
| 96 | int len = strchrnul(date_str, '.') - date_str;
|
---|
| 97 |
|
---|
| 98 | /* MM[.SS] */
|
---|
| 99 | if (len == 2 && sscanf(date_str, "%2u%2u%2u%2u""%2u%c" + 12,
|
---|
| 100 | &ptm->tm_min,
|
---|
| 101 | &end) >= 1) {
|
---|
| 102 | } else
|
---|
| 103 | /* HHMM[.SS] */
|
---|
| 104 | if (len == 4 && sscanf(date_str, "%2u%2u%2u""%2u%2u%c" + 9,
|
---|
| 105 | &ptm->tm_hour,
|
---|
| 106 | &ptm->tm_min,
|
---|
| 107 | &end) >= 2) {
|
---|
| 108 | } else
|
---|
| 109 | /* ddHHMM[.SS] */
|
---|
| 110 | if (len == 6 && sscanf(date_str, "%2u%2u""%2u%2u%2u%c" + 6,
|
---|
| 111 | &ptm->tm_mday,
|
---|
| 112 | &ptm->tm_hour,
|
---|
| 113 | &ptm->tm_min,
|
---|
| 114 | &end) >= 3) {
|
---|
| 115 | } else
|
---|
| 116 | /* mmddHHMM[.SS] */
|
---|
| 117 | if (len == 8 && sscanf(date_str, "%2u""%2u%2u%2u%2u%c" + 3,
|
---|
| 118 | &ptm->tm_mon,
|
---|
| 119 | &ptm->tm_mday,
|
---|
| 120 | &ptm->tm_hour,
|
---|
| 121 | &ptm->tm_min,
|
---|
| 122 | &end) >= 4) {
|
---|
| 123 | /* Adjust month from 1-12 to 0-11 */
|
---|
| 124 | ptm->tm_mon -= 1;
|
---|
| 125 | } else
|
---|
| 126 | /* yymmddHHMM[.SS] */
|
---|
| 127 | if (len == 10 && sscanf(date_str, "%2u%2u%2u%2u%2u%c",
|
---|
| 128 | &ptm->tm_year,
|
---|
| 129 | &ptm->tm_mon,
|
---|
| 130 | &ptm->tm_mday,
|
---|
| 131 | &ptm->tm_hour,
|
---|
| 132 | &ptm->tm_min,
|
---|
| 133 | &end) >= 5) {
|
---|
| 134 | /* Adjust month from 1-12 to 0-11 */
|
---|
| 135 | ptm->tm_mon -= 1;
|
---|
| 136 | } else
|
---|
| 137 | /* ccyymmddHHMM[.SS] */
|
---|
| 138 | if (len == 12 && sscanf(date_str, "%4u%2u%2u%2u%2u%c",
|
---|
| 139 | &ptm->tm_year,
|
---|
| 140 | &ptm->tm_mon,
|
---|
| 141 | &ptm->tm_mday,
|
---|
| 142 | &ptm->tm_hour,
|
---|
| 143 | &ptm->tm_min,
|
---|
| 144 | &end) >= 5) {
|
---|
| 145 | ptm->tm_year -= 1900; /* Adjust years */
|
---|
| 146 | ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
|
---|
| 147 | } else {
|
---|
| 148 | bb_error_msg_and_die(bb_msg_invalid_date, date_str);
|
---|
| 149 | }
|
---|
| 150 | if (end == '.') {
|
---|
| 151 | /* xxx.SS */
|
---|
| 152 | if (sscanf(strchr(date_str, '.') + 1, "%u%c",
|
---|
| 153 | &ptm->tm_sec, &end) == 1)
|
---|
| 154 | end = '\0';
|
---|
| 155 | /* else end != NUL and we error out */
|
---|
| 156 | }
|
---|
| 157 | }
|
---|
| 158 | if (end != '\0') {
|
---|
| 159 | bb_error_msg_and_die(bb_msg_invalid_date, date_str);
|
---|
| 160 | }
|
---|
| 161 | }
|
---|
| 162 |
|
---|
| 163 | time_t FAST_FUNC validate_tm_time(const char *date_str, struct tm *ptm)
|
---|
| 164 | {
|
---|
| 165 | time_t t = mktime(ptm);
|
---|
| 166 | if (t == (time_t) -1L) {
|
---|
| 167 | bb_error_msg_and_die(bb_msg_invalid_date, date_str);
|
---|
| 168 | }
|
---|
| 169 | return t;
|
---|
| 170 | }
|
---|
| 171 |
|
---|
| 172 | #if ENABLE_MONOTONIC_SYSCALL
|
---|
| 173 |
|
---|
| 174 | #include <sys/syscall.h>
|
---|
| 175 | /* Old glibc (< 2.3.4) does not provide this constant. We use syscall
|
---|
| 176 | * directly so this definition is safe. */
|
---|
| 177 | #ifndef CLOCK_MONOTONIC
|
---|
| 178 | #define CLOCK_MONOTONIC 1
|
---|
| 179 | #endif
|
---|
| 180 |
|
---|
| 181 | /* libc has incredibly messy way of doing this,
|
---|
| 182 | * typically requiring -lrt. We just skip all this mess */
|
---|
| 183 | static void get_mono(struct timespec *ts)
|
---|
| 184 | {
|
---|
| 185 | if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts))
|
---|
| 186 | bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
|
---|
| 187 | }
|
---|
| 188 | unsigned long long FAST_FUNC monotonic_ns(void)
|
---|
| 189 | {
|
---|
| 190 | struct timespec ts;
|
---|
| 191 | get_mono(&ts);
|
---|
| 192 | return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
|
---|
| 193 | }
|
---|
| 194 | unsigned long long FAST_FUNC monotonic_us(void)
|
---|
| 195 | {
|
---|
| 196 | struct timespec ts;
|
---|
| 197 | get_mono(&ts);
|
---|
| 198 | return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
|
---|
| 199 | }
|
---|
| 200 | unsigned long long FAST_FUNC monotonic_ms(void)
|
---|
| 201 | {
|
---|
| 202 | struct timespec ts;
|
---|
| 203 | get_mono(&ts);
|
---|
| 204 | return ts.tv_sec * 1000ULL + ts.tv_nsec/1000000;
|
---|
| 205 | }
|
---|
| 206 | unsigned FAST_FUNC monotonic_sec(void)
|
---|
| 207 | {
|
---|
| 208 | struct timespec ts;
|
---|
| 209 | get_mono(&ts);
|
---|
| 210 | return ts.tv_sec;
|
---|
| 211 | }
|
---|
| 212 |
|
---|
| 213 | #else
|
---|
| 214 |
|
---|
| 215 | unsigned long long FAST_FUNC monotonic_ns(void)
|
---|
| 216 | {
|
---|
| 217 | struct timeval tv;
|
---|
| 218 | gettimeofday(&tv, NULL);
|
---|
| 219 | return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
|
---|
| 220 | }
|
---|
| 221 | unsigned long long FAST_FUNC monotonic_us(void)
|
---|
| 222 | {
|
---|
| 223 | struct timeval tv;
|
---|
| 224 | gettimeofday(&tv, NULL);
|
---|
| 225 | return tv.tv_sec * 1000000ULL + tv.tv_usec;
|
---|
| 226 | }
|
---|
| 227 | unsigned long long FAST_FUNC monotonic_ms(void)
|
---|
| 228 | {
|
---|
| 229 | struct timeval tv;
|
---|
| 230 | gettimeofday(&tv, NULL);
|
---|
| 231 | return tv.tv_sec * 1000ULL + tv.tv_usec / 1000;
|
---|
| 232 | }
|
---|
| 233 | unsigned FAST_FUNC monotonic_sec(void)
|
---|
| 234 | {
|
---|
| 235 | return time(NULL);
|
---|
| 236 | }
|
---|
| 237 |
|
---|
| 238 | #endif
|
---|