TOWCTRANS (man3p)
towctrans, towctrans_l — wide-character transliteration
towctrans, towctrans_l — wide-character transliteration
lfind — find entry in a linear search table
strndup — duplicate a specific number of bytes from a string
shm_open — open a shared memory object (REALTIME)
ungetc — push byte back into input stream
close — close a file descriptor
pthread_mutexattr_settype — set the mutex type attribute
getuid — get a real user ID
posix_mem_offset — find offset and length of a mapped typed memory block (ADVANCED REALTIME)
strspn — get length of a substring