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20. Signals: Fundamental Concepts > Signal Types and Default Actions

Signal Types and Default Actions

Earlier, we mentioned that the standard signals are numbered from 1 to 31 on Linux. However, the Linux signal(7) manual page lists more than 31 signal names. The excess names can be accounted for in a variety of ways. Some of the names are simply synonyms for other names, and are defined for source compatibility with other UNIX implementations. Other names are defined but unused. The following list describes the various signals:

SIGABRT

A process is sent this signal when it calls the abort() function (Terminating a Process Abnormally: abort() ). By default, this signal terminates the process with a core dump. This achieves the intended purpose of the abort() call: to produce a core dump for debugging.


  

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