testso.c

此源码是著名的教材BeginningLinux Programming中文名字叫Linux程序设计书中的源代码

#include <stdio.h>
#include <dlfcn.h>

int main(void)
{
	void	*handle;
	char	*error;
	void	(*welcome)( ); 
	
	if ((handle = dlopen("./libttt.so", RTLD_LAZY)) == NULL) 
	{
		printf ("dlopen error\n");
		exit (1);
	}
	
	welcome = dlsym(handle, "welcome");
	if ((error = dlerror()) != NULL)
	{
		printf ("dlsym error\n");
		exit (1);
		
	}
	
	welcome ();
	
	dlclose (handle);
	
	exit (0);
}