SETRLIMIT (man3p)
setrlimit — control maximum resource consumption
setrlimit — control maximum resource consumption
tcgetpgrp — get the foreground process group ID
opendir — open directory associated with file descriptor
stderr, stdin, stdout — standard I/O streams
open_memstream, open_wmemstream — open a dynamic memory buffer stream
tcflush — flush non-transmitted output data, non-read input data, or both
readdir, readdir_r — read a directory
pthread_mutex_init — destroy and initialize a mutex
posix_fadvise — file advisory information (ADVANCED REALTIME)
calloc — a memory allocator