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Full Discussion: Signal catching
Top Forums Programming Signal catching Post 302259791 by dark_knight on Wednesday 19th of November 2008 03:00:25 AM
Old 11-19-2008
Signal catching

Hi!
I want to catch all signals that my program receives print their name and then execute the default handler.
Can you help me on that?

I've tried the following code:
Code:
#include <stdio.h>
#include <unistd.h>
#include <signal.h>

void (*hnd[32])(int i);

char signals[32][10] = 
{
    "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 
    "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 
    "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 
    "SIGURG", "SIGSTOP", "SIGTSTP", "SIGCONT", "SIGCHLD", 
    "SIGTTIN", "SIGTTOU", "SIGIO", "SIGXCPU", "SIGXFSZ", 
    "SIGVTALRM", "SIGPROF", "SIGWINCH", "SIGINFO", "SIGUSR1", 
    "SIGUSR2", "SIGTHR" 
}; //SIGTHR?

void handle(int i)
{
    printf("I've received the signal named: %s\n", signals[i-1]);
    hnd[i](i);
}

int main()
{

    int i;
    for ( i = 1; i < 32; i++ )
        hnd[i] = signal(i, handle);    

    for (;;) pause();

    return 0;
}

This works somehow, but after receiving a signal it displays the message and then receives a segmentation fault signal. Any ideas?
 

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