Introduction
<sys/signal.h> lists the signal types on cdf. Table 11.5 and signal(5) give a list of some signal types and their default actions
When a C program receives a signal, control is immediately passed to a function called a signal handler
The signal handler function can execute some C statements and exit in three different ways:
- return control to the place in the program which was executing when the signal occurred
- return control to some other point in the program
- terminate the program by calling the exit (or _exit) function