...o test. Returns 1 in sp[0] if the expression matches the regular expression, 0 otherwise. mktime Converts a date specification in systime format to a timestamp . Usage: mktime( …...nformation used by tzset (3) and through that by functions like ctime (3), localtime (3), mktime (3), strftime (3). See also tzselect (8). • TERMCAP gives information on how to …...POSIX.1-2008] mknod() [Added in POSIX.1-2008] mknodat() [Added in POSIX.1-2008] mkstemp() mktime() nftw() opendir() openlog() pathconf() pclose() perror() popen() posix_fadvise(…