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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

Signal is a very important part in Linux programming. This article will introduce in detail the basic concepts of the signal mechanism, the general implementation of the signal mechanism in Linux, and how to use the signal, and several system calls

Signal is a very important part in Linux programming. This article will introduce in detail the basic concepts of the signal mechanism, the general implementation of the signal mechanism in Linux, and how to use the signal, and several system calls

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

signal and its processing signal processing is an event that UNIX and Linux systems generate in response to certain conditions, usually the kernel generates a signal, and the process receives a signal and takes action accordingly .For example,

For a complete signal Life Cycle (after the signal is sent to the corresponding processing function for execution), it can be divided into three phases: Signal Generation Sign up in process Logout of signal in process Signal processing

$ kill -l1) SIGHUP 2) SIGINT 3) SIGQUIT 4) SIGILL5) SIGTRAP 6) SIGABRT 7) SIGBUS 8) SIGFPE9) SIGKILL 10) SIGUSR1 11) SIGSEGV 12) SIGUSR213) SIGPIPE 14) SIGALRM 15) SIGTERM 16) SIGSTKFLT 17)

1. Daemon list AMD: Automatic Installation of NFS (Network File System) Guard process apmd: Advanced Power governance arpwatch: record logs and build an ethernet address and IP address on the LAN interface to the database autofs: automatic

From: http://www.dbafree.net /? P = 870 We can use kill-L to view all the semaphore interpretations, but we cannot see the signal 0 interpretations. [root@testdb~]# kill -l 1) SIGHUP 2) SIGINT 3) SIGQUIT 4) SIGILL 5) SIGTRAP 6)

Signal System Function calls provide a simple example. However, the C prototype Declaration makes it look more complex than the actual one. The signal function associates a given function with a specific signal. Here is the definition in FreeBSD