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-rw-r--r--libbb/time.c64
1 files changed, 63 insertions, 1 deletions
diff --git a/libbb/time.c b/libbb/time.c
index 850ac1542..30b760f71 100644
--- a/libbb/time.c
+++ b/libbb/time.c
@@ -6,9 +6,71 @@
*
* Licensed under GPL version 2, see file LICENSE in this tarball for details.
*/
-
#include "libbb.h"
+void FAST_FUNC parse_datestr(const char *date_str, struct tm *tm_time)
+{
+ char end = '\0';
+ const char *last_colon = strrchr(date_str, ':');
+
+ if (last_colon != NULL) {
+ /* Parse input and assign appropriately to tm_time */
+
+ 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",
+ &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 */
+ tm_time->tm_mon -= 1;
+ } else 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, &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)
+ } else {
+ bb_error_msg_and_die(bb_msg_invalid_date, date_str);
+ }
+ if (end == ':') {
+ 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)
+ 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 == '.') {
+ if (sscanf(strchr(date_str, '.') + 1, "%u%c",
+ &tm_time->tm_sec, &end) == 1)
+ end = '\0';
+ /* else end != NUL and we error out */
+ }
+ }
+ if (end != '\0') {
+ bb_error_msg_and_die(bb_msg_invalid_date, date_str);
+ }
+}
+
#if ENABLE_MONOTONIC_SYSCALL
#include <sys/syscall.h>