Handling Signals
Signal handlers can be installed with the signal system call. If a signal handler is not installed for a particular signal, the default handler is used. Otherwise the signal is intercepted and the signal handler is invoked. The process can also specify two default behaviors, without creating a handler: ignore the signal (SIG_IGN) and use the default signal handler (SIG_DFL). There are two signals which cannot be intercepted and handled: SIGKILL and SIGSTOP.
Read more about this topic: Unix Signal
Famous quotes containing the words handling and/or signals:
“Madam, a circulating library in a town is as an evergreen tree of diabolical knowledge; it blossoms through the year. And depend on it ... that they who are so fond of handling the leaves, will long for the fruit at last.”
—Richard Brinsley Sheridan (1751–1816)
“The term preschooler signals another change in our expectations of children. While toddler refers to physical development, preschooler refers to a social and intellectual activity: going to school. That shift in emphasis is tremendously important, for it is at this age that we think of children as social creatures who can begin to solve problems.”
—Lawrence Kutner (20th century)