sigint linux

Tags: System ops LinuxBasic knowledge of computer playing:CPU (operator, Controller), memory, I/O (input device, output device)程序运行模式： 用户空间：user space,us （可执行普通指令） 内核空间：system space （可执行特权指令）POS：Postable Operating System 可移植操作系统 POSIX 可移植操作系统规范运行程序格式：Windows：EXE，库文件dll（dynamic link library 动态链接库）Linux：ELF，库文件so（shared object 共享对象）程序：指令+数据 指令：只读 数据：读写程序：算法+数据结构库调用，系统调用：允许被调用的程序；malloc() 申请内存空间；free() 释放内存空间；编程语言 汇编语言：微码编程（系统级程序员） 系统中某些于硬件相关的特有代码、驱动程序开发； 高级语言：C、C++

From the previous articles in my blog, it has been emphasized that the operating system is a multi-process collaborative operation to achieve the logical purpose of the entire operating system, to achieve an artificially manipulated system:The previous blog post has been describing process control, communication between processes, and thread control and manipulation, but it has not been described how multiple processes communicate with each other to inform the entire system. For many different p

Downloadwget http://.....tar.gzExtractTAR-ZXVF xxx.tar.gzcd XXX./configure--prefix=/usr/local/xxx--with-x=/usr/local/xCompileMakeInstallationMake installNginx Start/usr/local/nginx/sbin/nginx Stop/usr/local/nginx/sbin/nginx-s Stop Focus/usr/local/nginx/sbin/nginx-s Reload httpd start, shut down, restart/usr/local/http/bin/apachectl-k [Start | stop ...]Find processPs-ef|grep xxx The above describes the Linux installation software memorandum, i

signal, the system restores the current signal set to its original, and then calls the handler function. Stevens in the Advanced Programming for UNIX environment. "If a signal is caught and if the signal handler returns, then Sigsuspend returns and the SIG Nal Mask of the "process is" set to its value before the called to Sigsuspend. "Because the Sigsuspend is atomic operation, so this is the feeling of the first call signal handler Return first, then sigsuspend back. int main (void) {sigset

Becoming a Senior Programmer proficient in Linux programming has always been the goal of many friends. According to statistics from chinacache, the monthly salary of Linux programmers in Beijing is 1.8 times that of Windows programmers, 2.6 times that of Java programmers, and 2.9 times that of Windows programmers. At the same time, the data shows that with the increase of work experience, the income gap bet

parent process. SIGINT When a user presses the interrupt key (usually Ctrl + C), the kernel sends this signal to all processes associated with the terminal. It provides a simple way to stop running programs. SIGQUIT This signal is very similar to SIGINT. When you press the return key (ASCII code FS, usually Ctrl + \), the kernel sends this signal. SIGQUIT will form an abnormal termination described by POS

Signal ClassificationUnreliable signals VS. Reliable SignalsThe Linux signaling mechanism is basically inherited from Unix systems. The signaling mechanism in the early Unix system was relatively simple and primitive, and later exposed some problems in practice, and its main problems were:1. Each time the process processes the signal, the response to the signal is set to the default action. In some cases, it will cause error handling of the signal, so

SA_RESTART --------------------------------------- set the SA_RESTART attribute of the signal S. if the system call is interrupted by the signal S, when the signal processing function returns, the system call is automatically restored. # include lt; signal. h gt; # include lt; stdio. h gt; # include SA_RESTART-----------------------------------------Set the SA_RESTART attribute of the signal S. if the system call is interrupted by the signal S, after the signal processing function returns,T

process PID 7, Kill,killallFor people with Linux C programming experience, we know that one of the ways of IPC communication is through the semaphore (signal), so for the kill and Killall commands, they have a lot to do with the semaphore, or kill, The Killall command allows us to manually pass signals to the process to control the process by signaling the semaphore.The common semaphore is as follows: [Email protected] ~]# kill-l 1) SIGHUP

LAST,LASTB (1) Linux System Administrator ' s Manual LAST,LASTB (1)NAMELast, lastb-show listing of the last logged in usersSynopsisLast [-R] [-num] [-N num] [-adfiowx] [-f file] [-t YYYYMMDDHHMMSS] [name ...] [TTY ...]LASTB [-R] [-num] [-N num] [-f file] [-adfiowx] [name ...] [TTY ...]DESCRIPTIONLast searches back through the file/var/log/wtmp (or the file designated by THE-F flag) and displays a list of all us ERs logged in (andOut) Since this file w

1. timer on Windows # Define win32_lean_and_mean# Include "windows. h" Uint tid; Void callback timerhandler (hwnd, uint umsg, uint idevent, DWORD dwtime ){Printf ("timer called @ [% ld]/n", dwtime );} Static bool winapi signalhandler (DWORD event ){Switch (event ){Case ctrl_c_event:Case ctrl_break_event:Killtimer (hwnd) null, tid );// Handle Y not to call other handlers.Return false;} Return true;} Int main (INT argc, char ** argv ){MSG; If (! Setconsolectrlhandler (signalhandler, true/* Add */

, sigxfszBy default, the process exits with the following signals: sigalrm, sighup, SIGINT, sigkill, sigpipe, sigpoll, sigprof, sigsys, sigterm, SIGUSR1, sigusr2, and sigvtalrm.By default, the signal that causes the process to stop is: sigstop, sigtstp, sigttin, sigttouSignals ignored by default include sigchld, sigpwr, sigurg, and sigwinch. In addition, sigio exits in svr4 and is ignored in 4.3bsd; sigcont continues when the process is suspended; oth

(sign) { CaseSIGINT://SIGINT default behavior is to exit the processprintf"SIGINT signal\n"); Exit (0); Break; CaseSIGALRM://SIGALRM default behavior is to exit the processprintf"SIGALRM signal\n"); Break; Casesigkill:printf ("SIGKILL signal\n"); Break; }}//It is recommended to use the mysignal after encapsulationintMysignal (intSignvoid(*func) (int)){ structsigaction act,oact; //Incoming callback f

Blog gradually migrated to, independent blog, the original address http://www.woniubi.cn/two_groups_signal_difference/Before looking at the signal, there is not much attention to the comparison of different signals. When I see it again today, I suddenly feel very similar to some of the signals, and even very easy to confuse. Let's take a moment to summarize this weekend.First set of shutdown process signalsThe common 4 off process signal is sigkill,sigint