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#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <dlfcn.h>
#include <stdint.h>
#define LIBNAME "libundef.so"
int main(int argc, char **argv)
{
void *handle;
int (*myundefined)(void);
handle = dlopen(LIBNAME, RTLD_LAZY);
if (!handle) {
fprintf(stderr, "Could not open ./%s: %s\n", LIBNAME, dlerror());
return EXIT_FAILURE;
}
myundefined = dlsym(handle, "__booga_booga_you_cant_touch_this__");
if (myundefined != NULL) {
fprintf(stderr, "dlsym() found a symbol that does not exist!\n");
return EXIT_FAILURE;
}
dlclose(handle);
return EXIT_SUCCESS;
}
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