following functions are present: setpgid () tcdrain () tcflush () tcgetpgrp () tcsendbreak () tcsetattr () tcsetpgrp () MF - _POSIX_MAPPED_FILESeuidaccess (3), initgroups (3), killpg (3), tcgetpgrp (3), tcgetsid (3), tcsetpgrp (3), group (5), passwdtcflow (3) tcflush (3) tcgetattr (3) tcgetpgrp (3) tcsendbreak (3) tcsetattr (3) tcsetpgrp (3) time