Not all of the FreeBSD C library has been compiled. In some cases, the functions missing simply cannot be implemented in the OSKit's basic environment. In other cases, they are on the yet to be done list, and will eventually be added. The list of the missing functions follows is:
All of the external data representation (xdr) functions, all of the remote procedure call (rpc) functions, gethostid, sethostid, getwd, killpg, setpgrp, setrgid, setruid, sigvec, sigpause, catopen, catclose, catgets, clock, confstr, crypt, ctermid, daemon, devname, errlst, execve, execl, execlp, execle, exect, execv, execvp, getfsent, getfsspec, getfsfile, setfsent, endfsent, getbootfile, getbsize, cgetent, cgetset, cgetmatch, cgetcap, cgetnum, cgetstr, cgetustr, cgetfirst, cgetnext, cgetclose getcwd, getdomainname, getgrent, getgrnam, getgrgid, setgroupent, setgrent, endgrent, getlogin, getmntinfo, getnetgrent, innetgr, setnetgrent, endnetgrent getosreldate, getpass, getpwent, getpwnam, getpwuid, setpassent, setpwent, endpwent, getttyent, getttynam, setttyent, endttyent, getusershell, setusershell, endusershell, getvfsbyname, getvfsbytype, getvfsent, setvfsent, endvfsent, vfsisloadable, vfsload, glob, globfree, initgroups, msgctl, msgget, msgrcv, msgsnd, nice, nlist, ntp_gettime, pause, popen, psignal, user_from_uid, group_from_gid, scandir, seekdir, semconfig, semctl, semget, semop, setdomainname, sethostname, longjmperror, setmode, getmode, shmat, shmctl, shmdt, shmget, siginterrupt, siglist, sleep, sysconf, sysctl, times, timezone, ttyname, ttyslot, ualarm, unvis, usleep, valloc, vis, wait, wait3, and waitpid.