Signal Handling Example (linux C/C++)

Signal Handling Example (linux C/C++)

#include <iostream>

#include <stdio.h>

#include <signal.h>

#include <stdlib.h>

#include <fstream>

class TestClass{

public:

    static void handle_signal(int signal);

};

void TestClass::handle_signal(int signal) {

    //char *signalName;

    std::string signalName = "";

    sigset_t pending;

    switch(signal) {

        case SIGHUP:

            signalName = "SIGHUP";

            break;

        case SIGINT:

            signalName = "SIGINT";

            break;

        case SIGTERM:

            signalName = "SIGTERM";

            break;

        case SIGQUIT:

            signalName = "SIGQUIT";

            break;

        case SIGKILL:

            signalName = "SIGKILL";

            break;

        default:

            printf("Caught unknown signal: %d\n", signal);

            return;

    }

    //실행하고 싶은 함수        

    std::ofstream outFile("./output.txt", std::ios::app);

    printf("Linux signal occurred. signal[%d] : name[%s]\n", signal, signalName.c_str());

    std::string str(std::string("Linux signal occurred. signal[") + std::to_string(signal) + "] signal Name["+ std::string(signalName) + "]");

    outFile << str << std::endl;

    outFile.close();

    //exit(0);

}

int main(int argc, char* arv[]) {

    TestClass *A = new TestClass();

    struct sigaction signalhandler;

    //stack_t sigstk; //for seg.fault

    //if ((sigstk.ss_sp = (char *)//malloc(SIGSTKSZ*2))==NULL) {

    //fprintf(stderr, "can't alloc alt stack\n");

    //}

    //sigstk.ss_size = SIGSTKSZ*2;

    //sigstk.ss_flags = 0;

    //if(sigaltstack(&sigstk, (stack_t *) 0) < 0) {

    //perror("sigaltstack");

    //}

    signalhandler.sa_handler = &TestClass::handle_signal;

    sigemptyset(&signalhandler.sa_mask);

    signalhandler.sa_flags = SA_RESETHAND | SA_ONSTACK;

    sigaction(SIGSEGV, &signalhandler,NULL);

    sigaction(SIGHUP, &signalhandler,NULL);

    sigaction(SIGINT, &signalhandler,NULL);

    sigaction(SIGTERM, &signalhandler,NULL);

    sigaction(SIGQUIT, &signalhandler,NULL);

    sigaction(SIGKILL, &signalhandler,NULL);

    while(1) {

    }

    return 1;

}

#Signal #Signal Handling #Signal Handler #C #C++ #Linux #Embedded