RAND (man3p)
rand, rand_r, srand — pseudo-random number generator
rand, rand_r, srand — pseudo-random number generator
wait, waitpid — wait for a child process to stop or terminate
pread — read from a file
wcspbrk — scan a wide-character string for a wide-character code
rewinddir — reset the position of a directory stream to the beginning of a directory
fchmodat — change mode of a file relative to directory file descriptor
floor, floorf, floorl — floor function
pthread_rwlock_unlock — unlock a read-write lock object
getgid — get the real group ID
posix_madvise — memory advisory information and alignment control (ADVANCED REALTIME)