Catching signal inside its own handler

Question

#include
#include

void handler(int signo)
{
    printf(\"Into handler\\n\");
    while(1);
}
int main()
{
    struct sigaction act;
          


        

Answer 1

You can use something like this instead of printf:

const char *str = "Into handler\n";
write(1, str, strlen(str));

The function write(..) is safe to be called from signal hanlder. Don't forget to include unistd.h header to use it.