UNIX'> X Window System'> environment variable'> file descriptor'> LOCALE'> regular expression'> Shell Command Language'> Pathname Matching'> iconv'> free'> malloc'> /bin/sh'> stdin'> stdout'> stderr'> stdio.h'> errno'> strerror'> dlopen'> dlsym'> dup'> fstat'> select'> setsockopt'> socket'> socketpair'> read'> write'> regex.h'> make'>