utime time ~~~ char *asctime(const struct tm *tm); char *asctime_r(const struct tm *tm, char *buf); ​ char *ctime(const time_t *timep); char *ctime_r(const time_t *timep, char *buf); ​ struct tm *gmtime(const time_t *timep); struct tm *gmtime_r(const time_t *timep, struct tm *result); ​ struct tm *localtime(const time_t *timep); struct tm *localtime_r(const time_t *timep, struct tm *result); ​ time_t mktime(struct tm *tm); ~~~