C Systems Programming.

POSIX from C: processes, signals, pipes, threads, sockets and mmap. Covers 12 sub-skills.

• C Systems Programming · 1 of 3

  select, poll & epoll

  Which three members make up struct pollfd?

  Afd, timeout, reventsBfd, in_events, outCfd, mask, readymaskDfd, events, revents

• C Systems Programming · 2 of 3

  wait, Exit Status & Zombies

  Which si_code value does waitid store when the child ended through _exit?

  ACLD_STOPPEDBCLD_EXITEDCCLD_KILLEDDCLD_TRAPPED

• C Systems Programming · 3 of 3

  mmap & Shared Memory

  A page is mapped with PROT_WRITE alone on Linux x86-64. What does a load from it do?

  AIt returns zero bytes without faultingBIt succeeds on that architectureCIt faults with SIGSEGV at onceDIt faults with SIGBUS at once