From 38dd8aa657d80232d8bbce4ed359af2022f605c7 Mon Sep 17 00:00:00 2001
From: Denys Vlasenko <vda.linux@googlemail.com>
Date: Sat, 18 Jul 2009 04:49:20 +0200
Subject: touch: implement -t TIME (needed for testsuite)
This changes date -d TIME format a bit, makes it more compatible
function old new delta
parse_datestr 391 618 +227
touch_main 360 361 +1
packed_usage 26624 26615 -9
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
libbb/time.c | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++----------
1 file changed, 82 insertions(+), 15 deletions(-)
(limited to 'libbb')
diff --git a/libbb/time.c b/libbb/time.c
index 1cf2a050e..0816022b9 100644
--- a/libbb/time.c
+++ b/libbb/time.c
@@ -16,50 +16,117 @@ void FAST_FUNC parse_datestr(const char *date_str, struct tm *tm_time)
if (last_colon != NULL) {
/* Parse input and assign appropriately to tm_time */
+ /* HH:MM */
if (sscanf(date_str, "%u:%u%c",
&tm_time->tm_hour,
&tm_time->tm_min,
&end) >= 2) {
/* no adjustments needed */
- } else if (sscanf(date_str, "%u.%u-%u:%u%c",
+ } else
+ /* mm.dd-HH:MM */
+ if (sscanf(date_str, "%u.%u-%u:%u%c",
&tm_time->tm_mon, &tm_time->tm_mday,
&tm_time->tm_hour, &tm_time->tm_min,
&end) >= 4) {
- /* Adjust dates from 1-12 to 0-11 */
+ /* Adjust month from 1-12 to 0-11 */
tm_time->tm_mon -= 1;
- } else if (sscanf(date_str, "%u.%u.%u-%u:%u%c", &tm_time->tm_year,
+ } else
+ /* yyyy.mm.dd-HH:MM */
+ if (sscanf(date_str, "%u.%u.%u-%u:%u%c", &tm_time->tm_year,
&tm_time->tm_mon, &tm_time->tm_mday,
&tm_time->tm_hour, &tm_time->tm_min,
&end) >= 5) {
tm_time->tm_year -= 1900; /* Adjust years */
- tm_time->tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
- } else if (sscanf(date_str, "%u-%u-%u %u:%u%c", &tm_time->tm_year,
+ tm_time->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
+ } else
+ /* yyyy-mm-dd HH:MM */
+ if (sscanf(date_str, "%u-%u-%u %u:%u%c", &tm_time->tm_year,
&tm_time->tm_mon, &tm_time->tm_mday,
&tm_time->tm_hour, &tm_time->tm_min,
&end) >= 5) {
tm_time->tm_year -= 1900; /* Adjust years */
- tm_time->tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
-//TODO: coreutils 6.9 also accepts "YYYY-MM-DD HH" (no minutes)
+ tm_time->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
+//TODO: coreutils 6.9 also accepts "yyyy-mm-dd HH" (no minutes)
} else {
bb_error_msg_and_die(bb_msg_invalid_date, date_str);
}
if (end == ':') {
+ /* xxx:SS */
if (sscanf(last_colon + 1, "%u%c", &tm_time->tm_sec, &end) == 1)
end = '\0';
/* else end != NUL and we error out */
}
} else {
- if (sscanf(date_str, "%2u%2u%2u%2u%u%c", &tm_time->tm_mon,
- &tm_time->tm_mday, &tm_time->tm_hour, &tm_time->tm_min,
- &tm_time->tm_year, &end) < 4)
+ /* Googled the following on an old date manpage:
+ *
+ * The canonical representation for setting the date/time is:
+ * cc Century (either 19 or 20)
+ * yy Year in abbreviated form (e.g. 89, 06)
+ * mm Numeric month, a number from 1 to 12
+ * dd Day, a number from 1 to 31
+ * HH Hour, a number from 0 to 23
+ * MM Minutes, a number from 0 to 59
+ * ss Seconds, a number from 0 to 61 (with leap seconds)
+ * Everything but the minutes is optional
+ *
+ * This coincides with the format of "touch -t TIME"
+ */
+ int len = strchrnul(date_str, '.') - date_str;
+
+ /* MM[.SS] */
+ if (len == 2 && sscanf(date_str, "%2u%2u%2u%2u%2u%c" + 12,
+ &tm_time->tm_min,
+ &end) >= 1) {
+ } else
+ /* HHMM[.SS] */
+ if (len == 4 && sscanf(date_str, "%2u%2u%2u%2u%2u%c" + 9,
+ &tm_time->tm_hour,
+ &tm_time->tm_min,
+ &end) >= 2) {
+ } else
+ /* ddHHMM[.SS] */
+ if (len == 6 && sscanf(date_str, "%2u%2u%2u%2u%2u%c" + 6,
+ &tm_time->tm_mday,
+ &tm_time->tm_hour,
+ &tm_time->tm_min,
+ &end) >= 3) {
+ } else
+ /* mmddHHMM[.SS] */
+ if (len == 8 && sscanf(date_str, "%2u%2u%2u%2u%2u%c" + 3,
+ &tm_time->tm_mon,
+ &tm_time->tm_mday,
+ &tm_time->tm_hour,
+ &tm_time->tm_min,
+ &end) >= 4) {
+ /* Adjust month from 1-12 to 0-11 */
+ tm_time->tm_mon -= 1;
+ } else
+ /* yymmddHHMM[.SS] */
+ if (len == 10 && sscanf(date_str, "%2u%2u%2u%2u%2u%c",
+ &tm_time->tm_year,
+ &tm_time->tm_mon,
+ &tm_time->tm_mday,
+ &tm_time->tm_hour,
+ &tm_time->tm_min,
+ &end) >= 5) {
+ /* Adjust month from 1-12 to 0-11 */
+ tm_time->tm_mon -= 1;
+ } else
+ /* yyyymmddHHMM[.SS] */
+ if (len == 12 && sscanf(date_str, "%4u%2u%2u%2u%2u%c",
+ &tm_time->tm_year,
+ &tm_time->tm_mon,
+ &tm_time->tm_mday,
+ &tm_time->tm_hour,
+ &tm_time->tm_min,
+ &end) >= 5) {
+ tm_time->tm_year -= 1900; /* Adjust years */
+ tm_time->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
+ } else {
bb_error_msg_and_die(bb_msg_invalid_date, date_str);
- /* correct for century - minor Y2K problem here? */
- if (tm_time->tm_year >= 1900) {
- tm_time->tm_year -= 1900;
}
- /* adjust date */
- tm_time->tm_mon -= 1;
if (end == '.') {
+ /* xxx.SS */
if (sscanf(strchr(date_str, '.') + 1, "%u%c",
&tm_time->tm_sec, &end) == 1)
end = '\0';
--
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