Signal Handling--ref

If the process is the leader of the process group,the default action is to print some status information about the system and what the process is doing. Otherwise the default is to do nothing.

strsignalandpsignal. These functions use a signal number to specify which kind of signal to describe. The signal number may come from the termination status of a child process (see section) or it may come from a signal handler in the same process.

char *strsignal(intsignum)

This function returns a pointer to a statically-allocated string containing a message describing the signalsignum. You should not modify the contents of this string; and,since it can be rewritten on subsequent calls,you should save a copy of it if you need to reference it later.

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