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
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
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
Linux _ signal operations
Create two sub-processes;Step 1: Write the mytest.txt file,Write once every 5 seconds,The time when the data is written.Step 2: Read the file mytest.txt,Read every 5 seconds,Read and print the latest time written in the
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
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
=============== Problem description ====================
I found a lot of information on the Internet.
First, this is an underlying error.
Some people say this is because of the multi-thread mutex problem. We need to add synchronized.
Someone
Understanding sigbus and SIGSEGV
Searched by google
Q: How do I understand SIGSEGV.A: nkwht @ smthNkwht uses Google to obtain such knowledge. There are multiple possible sigbus signals:1) hardware faults. Needless to say, this is certainly not the
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)
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