diff options
Diffstat (limited to 'libbb/time.c')
| -rw-r--r-- | libbb/time.c | 64 |
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> |