*
* 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 */
+
+ /* HH:MM */
+ if (sscanf(date_str, "%u:%u%c",
+ &tm_time->tm_hour,
+ &tm_time->tm_min,
+ &end) >= 2) {
+ /* no adjustments needed */
+ } 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 month from 1-12 to 0-11 */
+ tm_time->tm_mon -= 1;
+ } 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 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 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 {
+ /* 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
+ /* ccyymmddHHMM[.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);
+ }
+ if (end == '.') {
+ /* xxx.SS */
+ 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);
+ }
+}
+
+time_t FAST_FUNC validate_tm_time(const char *date_str, struct tm *tm_time)
+{
+ time_t t = mktime(tm_time);
+ if (t == (time_t) -1L) {
+ bb_error_msg_and_die(bb_msg_invalid_date, date_str);
+ }
+ return t;
+}
+
#if ENABLE_MONOTONIC_SYSCALL
#include <sys/syscall.h>
projects / oweals / busybox.git / blobdiff