signal trap

The trap command is used to specify the action to be taken after the signal is received. A common use is to complete the cleanup when the script is interrupted. However, this time I met it because the customer has a requirement: the user who

A signal is a mechanism for inter-process communication. It provides an asynchronous software interruption for an application to receive commands (that is, signals) sent by other active terminals ). After an application receives a signal, there are

A signal is a interprocess communication mechanism that provides an application with an asynchronous software interrupt that gives the application the opportunity to accept commands (i.e., signals) sent by other programs live terminals. After the

1) Trap Introduction2) Trap Signal list3) Trap Use example4) test the INT (2) signal5) Simultaneous testing of multiple signals6) Shell Springboard machine case"Trap Introduction"The trap command is used to specify the action to take after the

Signal is a very important part of Linux programming, this article will detail the basic concept of signal mechanism, the approximate realization method of Linux to signal mechanism, how to use signal, and several system calls about signal.Signal

Once the trap captures the signal, there are three ways to react:(1) Execute a procedure to process this signal(2) The default action to accept the signal(3) Ignoring this signalTwo. The trap provides three basic forms for the above three ways:The

A signal (signal) is a software interrupt that provides a way to handle asynchronous events and is the only asynchronous communication between processes. In a Linux system, the subsequent signaling mechanism is extended according to the POSIX

1. What is interruption? 1. Basic concepts of Interruption Interruptions refer to any unusual or unexpected emergency handling event in the system during the execution of a computer, this allows the CPU to temporarily interrupt the program being

A signal is a software interrupt, an asynchronous communication method that handles an asynchronous event. For example, we run the program in the terminal, by pressing the keyboard "CTRL + C", you can send a SIGINT interrupt signal to stop the

Reference: Signal processing practice in shell scripts the signal trap function of the Linux shell you must know the details in Unix, each type of event that can occur is described by an independent signal, each of which is a small positive integer,