System function about a process descendents

Implementati o functie sistem care sa ofere date (PID, stare, statistici legate de executie etc.) despre toti descendentii unui proces dat (in ordine DFS). Scrieti programe in userland care sa afiseze arborii rezultati folosind noua functie de sistem. Implement a system function that offers data (PID, state, execution statistics) about all the descendents of a given process(in DFS order). Then write an userland program that display the resulted trees using the new function.