CFSETISPEED (man3p)
cfsetispeed — set input baud rate
cfsetispeed — set input baud rate
closedir — close a directory stream
exp, expf, expl — exponential function
waitid — wait for a child process to change state
catanh, catanhf, catanhl — complex arc hyperbolic tangent functions
putwchar — put a wide character on a stdout stream
pthread_attr_destroy, pthread_attr_init — destroy and initialize the thread attributes object
lchown — change the owner and group of a symbolic link
recv — receive a message from a connected socket
getc — get a byte from a stream