❖
Call the signal handler
❖
Ignore a signal that in this case "disappears" and does not take any
action
❖
Use the default allocation (this is the default setting for each signal,
often ending the process)
The process can set individual exposure for each signal.
Signal Blocking
The process can not only set the position of signals but also determine its
willingness to receive signals of a certain type at that moment. If the
process is not ready, it can block these signals. If a locked signal is to be
delivered to a process, the system queues it where it will stay and remains
until the process unlocks it. The process locks and unlocks signals by
changing the
process signal mask (a special data structure that stores
information about what signals can be delivered to the process immediately,
usually stored in its control block. The descendant processes inherit the
ancestral signal mask.
