Linux Signal Detail II (signal classification)

Signal Classification The signal is divided into reliable signal and unreliable signal unreliable signal disadvantage ①: processing signal, need to re-register the signal; ② signal may be lost. Linux has been optimized for the shortcomings of ①, now the unreliable problem is mainly refers to the signal may be lost signal can also be divided into real-time signals and non-real-time  signals- the general unreliable signal refers to the first 32 kinds of signals, these 32 kinds of signals have been pre-defined values, Each signal has a definite purpose and meaning, and each signal has its own default action --a reliable signal refers to the 32 kinds of signals --the non-real-time signal does not support queuing, are unreliable signals, real-time signal support queuing, are reliable signals. 

Linux Signal Detail II (signal classification)