операции над процессом или потоком (operations on a process or thread)
Возвращаемое значение (Return value)
On success, PR_CAP_AMBIENT+PR_CAP_AMBIENT_IS_SET,
PR_CAPBSET_READ, PR_GET_DUMPABLE, PR_GET_FP_MODE,
PR_GET_IO_FLUSHER, PR_GET_KEEPCAPS, PR_MCE_KILL_GET,
PR_GET_NO_NEW_PRIVS, PR_GET_SECUREBITS, PR_GET_SPECULATION_CTRL,
PR_SVE_GET_VL, PR_SVE_SET_VL, PR_GET_TAGGED_ADDR_CTRL,
PR_GET_THP_DISABLE, PR_GET_TIMING, PR_GET_TIMERSLACK, and (if it
returns) PR_GET_SECCOMP return the nonnegative values described
above. All other option values return 0 on success. On error,
-1 is returned, and errno is set to indicate the error.
