Example of a constructor function

init_fini.c

#include <stdio.h>
void never_call(void){
	printf("[*] success!! call to function never_call!!!\n\n");
}
void __attribute__ ((destructor)) foo_destructor(void){
	printf("[*] hay! you called by destructor!! \n");
	return;
}
void __attribute__ ((constructor)) foo_constructor(void){
	printf("[*] hay! you called by constructor!! \n");
	return;
}
int main(int argc, char **argv){
	printf("[*] call to main function\n");
	return 0;
}
/*
> ./init_fini.elf 
[*] hay! you called by constructor!! 
[*] call to main function
[*] hay! you called by destructor!! 
*/