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SIGNALS
KILL - To terminate and wipe out a process.2 types: 1) Suggestive and 2) Hard
HUP - Just like Unix,sent when controlling term is exited.
ALARM - Measure Real-Time of a process,it is sent this signal according to its <parameter no. of secs.>
SUSPEND - Take the proc. out of the running list,but keep it in memory,ready to execute.
CONTINUE - Continue where it left off. (Turns OFF Suspend bit)
WINDOW_SIZE_CHANGE - Window size of TCP connection has changed.
CONNECTION_SNAP - Getting a RST packet for an open TCP connection.
OUT-OF-BAND-DATA - Received.
KEY - For hooking a particular keypress eg. CTRL-Q,for TSRs.
The signals cause a JMP to the signal handler for that signal,if it exists (otherwise the field in the process table is set to 0).