int
main (void)
{
void *obj2;
void *obj3[2];
const char *loaded[] = { NULL, NULL, NULL, NULL };
int errors = 0;
printf ("\nThis is what is in memory now:\n");
errors += check_loaded_objects (loaded);
printf ("\nLoading shared object neededobj2.so\n");
obj2 = dlopen ("neededobj2.so", RTLD_LAZY);
if (obj2 == NULL)
{
printf ("%s\n", dlerror ());
exit (1);
}
loaded[0] = "neededobj1.so";
loaded[1] = "neededobj2.so";
errors += check_loaded_objects (loaded);
printf ("\nLoading shared object neededobj3.so\n");
obj3[0] = dlopen( "neededobj3.so", RTLD_LAZY);
if (obj3[0] == NULL)
{
printf ("%s\n", dlerror ());
exit (1);
}
loaded[2] = "neededobj3.so";
errors += check_loaded_objects (loaded);
printf ("\nNow loading shared object neededobj3.so again\n");
obj3[1] = dlopen ("neededobj3.so", RTLD_LAZY);
if (obj3[1] == NULL)
{
printf ("%s\n", dlerror ());
exit (1);
}
errors += check_loaded_objects (loaded);
printf ("\nClosing neededobj3.so once\n");
dlclose (obj3[0]);
errors += check_loaded_objects (loaded);
printf ("\nClosing neededobj2.so\n");
dlclose (obj2);
errors += check_loaded_objects (loaded);
printf ("\nClosing neededobj3.so for the second time\n");
dlclose (obj3[1]);
loaded[0] = NULL;
loaded[1] = NULL;
loaded[2] = NULL;
errors += check_loaded_objects (loaded);
if (errors != 0)
printf ("%d errors found\n", errors);
return errors;
}
static int
load_dso (const char **loading, int undef, int flag)
{
void *obj;
const char *loaded[] = { NULL, NULL, NULL, NULL };
int errors = 0;
const char *errstring;
printf ("\nThis is what is in memory now:\n");
errors += check_loaded_objects (loaded);
printf ("Loading shared object %s: %s\n", loading[0],
flag == RTLD_LAZY ? "RTLD_LAZY" : "RTLD_NOW");
obj = dlopen (loading[0], flag);
if (obj == NULL)
{
if (flag == RTLD_LAZY)
{
++errors;
printf ("ERRORS: dlopen shouldn't fail for RTLD_LAZY\n");
}
errstring = dlerror ();
if (strstr (errstring, "undefined symbol") == 0
|| strstr (errstring, "circlemod2_undefined") == 0)
{
++errors;
printf ("ERRORS: dlopen: `%s': Invalid error string\n",
errstring);
}
else
printf ("dlopen: %s\n", errstring);
}
else
{
if (undef && flag == RTLD_NOW)
{
++errors;
printf ("ERRORS: dlopen shouldn't work for RTLD_NOW\n");
}
if (!undef)
{
int (*func) (void);
func = dlsym (obj, "circlemod1");
if (func == NULL)
{
++errors;
printf ("ERRORS: cannot get address of \"circlemod1\": %s\n",
dlerror ());
}
else if (func () != 3)
{
++errors;
printf ("ERRORS: function \"circlemod1\" returned wrong result\n");
}
}
loaded[0] = loading[0];
loaded[1] = loading[1];
loaded[2] = loading[2];
}
errors += check_loaded_objects (loaded);
if (obj)
{
printf ("UnLoading shared object %s\n", loading[0]);
dlclose (obj);
loaded[0] = NULL;
loaded[1] = NULL;
loaded[2] = NULL;
errors += check_loaded_objects (loaded);
}
return errors;
}
int
main (int argc, char **argv)
{
void *obj;
const char *loaded[] = { NULL, NULL, NULL};
int errors = 0;
void (*f) (void);
const char *dir = dirname (argv [0]);
char *oldfilename;
char *newfilename;
c_function ();
printf ("\nThis is what is in memory now:\n");
errors += check_loaded_objects (loaded);
printf( "Loading shared object neededobj6.so\n");
obj = dlopen( "neededobj6.so", RTLD_LAZY);
if (obj == NULL)
{
printf ("%s\n", dlerror ());
exit (1);
}
f = dlsym (obj, "a2_function");
if (f == NULL)
{
printf ("%s\n", dlerror ());
exit (1);
}
f ();
loaded[0] = "neededobj5.so";
loaded[1] = "neededobj6.so";
errors += check_loaded_objects (loaded);
printf ("Closing neededobj6.so\n");
dlclose (obj);
loaded[0] = NULL;
errors += check_loaded_objects (loaded);
printf ("Rename neededobj5.so\n");
oldfilename = alloca (strlen (dir) + 1 + sizeof ("neededobj5.so"));
strcpy (oldfilename, dir);
strcat (oldfilename, "/");
strcat (oldfilename, "neededobj5.so");
newfilename = alloca (strlen (oldfilename) + sizeof (".renamed"));
strcpy (newfilename, oldfilename);
strcat (newfilename, ".renamed");
if (rename (oldfilename, newfilename))
{
perror ("rename");
exit (1);
}
printf( "Loading shared object neededobj6.so\n");
obj = dlopen( "neededobj6.so", RTLD_LAZY);
if (obj == NULL)
printf ("%s\n", dlerror ());
else
{
printf ("neededobj6.so should fail to load\n");
exit (1);
}
printf( "Loading shared object neededobj1.so\n");
obj = dlopen( "neededobj1.so", RTLD_LAZY);
if (obj == NULL)
{
printf ("%s\n", dlerror ());
exit (1);
}
errors += check_loaded_objects (loaded);
f = dlsym (obj, "c_function");
if (f == NULL)
{
printf ("%s\n", dlerror ());
exit (1);
}
f ();
printf ("Restore neededobj5.so\n");
if (rename (newfilename, oldfilename))
{
perror ("rename");
exit (1);
}
if (errors != 0)
printf ("%d errors found\n", errors);
return errors;
}