VPRINTF (man3p)
vprintf — format the output of a stdarg argument list
vprintf — format the output of a stdarg argument list
dup, dup2 — duplicate an open file descriptor
sem_open — initialize and open a named semaphore
ldexp, ldexpf, ldexpl — load exponent of a floating-point number
a64l, l64a — convert between a 32-bit integer and a radix-64 ASCII string
setsockopt — set the socket options
endgrent, getgrent, setgrent — group database entry functions
swab — swap bytes
setlocale — set program locale
dlclose — close a symbol table handle