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date,touch: treat 2-digit years better (fit them into +-50 yrs around today) 

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2011-01-02 20:02:09 +01:00
parent a5d3d3436b
commit 92ffe0571a
2 changed files with 16 additions and 3 deletions
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7
coreutils/touch.c
View File

@ -120,9 +120,10 @@ int touch_main(int argc UNUSED_PARAM, char **argv)
struct tm tm_time;
time_t t;
//time(&t);
//localtime_r(&t, &tm_time);
memset(&tm_time, 0, sizeof(tm_time));
//memset(&tm_time, 0, sizeof(tm_time));
/* Better than memset: makes "HH:MM" dates meaningful */
time(&t);
localtime_r(&t, &tm_time);
parse_datestr(date_str, &tm_time);
/* Correct any day of week and day of year etc. fields */

12
libbb/time.c
View File

@ -93,6 +93,7 @@ void FAST_FUNC parse_datestr(const char *date_str, struct tm *ptm)
*
* This coincides with the format of "touch -t TIME"
*/
unsigned cur_year = ptm->tm_year;
int len = strchrnul(date_str, '.') - date_str;
/* MM[.SS] */
@ -133,6 +134,17 @@ void FAST_FUNC parse_datestr(const char *date_str, struct tm *ptm)
&end) >= 5) {
/* Adjust month from 1-12 to 0-11 */
ptm->tm_mon -= 1;
if ((int)cur_year >= 50) { /* >= 1950 */
/* Adjust year: */
/* 1. Put it in the current century */
ptm->tm_year += (cur_year / 100) * 100;
/* 2. If too far in the past, +100 years */
if (ptm->tm_year < cur_year - 50)
ptm->tm_year += 100;
/* 3. If too far in the future, -100 years */
if (ptm->tm_year > cur_year + 50)
ptm->tm_year -= 100;
}
} else
/* ccyymmddHHMM[.SS] */
if (len == 12 && sscanf(date_str, "%4u%2u%2u%2u%2u%c",