sigint

systems have two major types of signals POSIX standard rule signal (regular signal 1-31 number) Real-time signal (real-time signal 32-63) Rule signal Signal Number name Default Action Description 1 SIGHUP Terminate Terminating a control terminal or process 2 SIGINT Terminate Terminal (CTRL-C) caused by the keyboard

times, you can receive how many times. Signal valueA reliable signal is located in the [Sigrtmin, Sigrtmax] zone.(2) Installation of the signalEarly Linux uses the system to call signal to install the signal#include void (*signal (int signum, void (*handler))) (int));The function has two parameters, Signum specifies the signal to be installed, handler the processing function of the specified signal.The return value of the function is a function pointer to the last installed handlerClassic Insta

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, such as:name value description sighup 1 Control terminal discovery suspended or control process death SIGINT 2 3 9 terminating signalUse: Kill-l to list suppor

Introduction to Linux programming-Signal Processing-general Linux technology-Linux programming and kernel information. For more information, see the following. Linux signal events In this chapter, we will discuss the signal processing functions in Linux. Signal processing functions in Linux: Signal Generation Signal Processing Other Signal Functions One instance 1. Signal Generation The signal in Linux is similar to the INT in DOS or Windows. When a signal occurs The signal we believe will be se

program continues after the signal processing function is executed. If the received signal terminates the program, sigsuspend will not return. If the received signal does not terminate the program, sigsuspend will return-1 and errno will be set to eintr. Note: If a signal is blocked by the process, it will not be passed to the process, but it will stay in the pending status. When the process unblocks the processing signal, the signal to be processed will be processed immediately. The following

These days, a network traffic collector Program Basically changed. In the main function, after several sub-threads are started, the system goes to bed for 10 minutes and then cleans up the Sub-threads and exits. Now, if you want to change it to a subthread after it starts, the main thread enters infinite sleep until it receives the sigterm or SIGINT. The main program is as follows: Other header files # Include Int main (INT argc, char * argv []) { //

Linux Signal Processing-general Linux technology-Linux programming and kernel information. The following is a detailed description. In this chapter, we will discuss the signal processing functions in Linux. Signal processing functions in Linux: Signal Generation Signal Processing Other Signal Functions One instance 1. Signal Generation The signals in Linux are similar to those in dos int or Windows. A trusted signal is sent to the corresponding process when a signal occurs. There are several sig

Turn from: http://blog.csdn.net/anxuegang/article/details/6636410 These days to a network flow collector program has been basically changed, the original in the main function in a few child threads started after sleeping 10 minutes after the start of cleaning child thread and exit. Now want to change to a child thread started after the main thread into infinite sleep, until received sigterm or SIGINT. The main program is as follows:Other header files

Http://blog.chinaunix.net/uid-9354-id-2425031.htmlSo I hope that the same way to deal with the multiple occurrences of the signal, it is best to use sigaction. The signal only appears and is processed once, can be used signal.Each time the signal function sets a specific signal processing function (non-sig_ign), it can only take effect once, and each time the process responds to processing the signal, the signal processing function is reverted to the default processing. So if you want to process

Whether the process can receive processing signals during processing, the same signal/different signalsLabels#include #include#include#includevoidSet_signal (intSigno) { if(Signo = =SIGINT) {printf ("%d catch sigint\n", Getpid ()); Sleep (5); printf ("Process the SIGINT finished\n"); } if(signo==SIGTSTP) {printf ("%d catch sigtstp\n", Getpid ()); Sleep (5);

/** Title: * Please write a program to set the SIGINT and sigquit signals, * and in the program to implement the operation of reading information from the file, * and ensure that the file is read and only in the process of reading the file will not be sent by the SIGINT and sigquit signal interrupted. * HINT: block the signal before the file is read and unblock the file after it is read. * */#include#includ

over to process 1, and process 1 becomes the stepfather of these sub-processes. Process 1 will handle the resources of these processes well. When they are finished, process 1 will automatically recycle the resources. Therefore, another temporary way to handle zombie processes is to close their parent processes. 4. Signal Generally, the multi-process is finished, but the signal is indeed a very important thing in the system. A signal is a signal lamp. When a signal lamp is lit, the program will

-- SIGINT ");Break;Case 3:Printf ("Get a signal -- SIGQUIT ");Break;}Return;} Int main (){Printf ("process id is % d", getpid ());Signal (SIGHUP, sigroutine); // * set the processing method of the three signals belowSignal (SIGINT, sigroutine );Signal (SIGQUIT, sigroutine );For (;;);} The signal SIGINT is triggered by pressing Ctrl-C, and the signal SIGQUIT is t

");}Void user_func (int signum){Printf ("receive signal % d/N", SIGNUM );} $ CC-o sus. c$./SUS [1] 997 Another Console# Kill-s 42 PID Look... $Now begin to get pending mask and unblock sigrtmin + 10 Signal sigrtmin + 10 is pendingReceive signal 42Signal unblocked, OK ...... [1] + exit 31./d$ Example 3: Signal Code # Include # Include # Include # Define damoVoid user_func (INT No){Switch (NO){Case 1:Printf ("Get sighup./N ");Break;Case 2:Printf ("Get SIGINT