int puts(const char* str) {
void* stdio = 0;
int (*real_puts)(const char*);
int result;
/* Dynamically load the real libc. */
stdio = dlopen("libc.so.6", RTLD_LAZY);
if (stdio) {
/* Locate the real puts function. */
real_puts = dlsym(stdio, "puts");
if (dlerror()) {
printf("Failed to load symbol puts from libc.\n");
result = -1;
} else {
/* Instrument whatever intercession you like here. */
real_puts("Intercepted: ");
result = real_puts(str);
}
/* Clean up. */
dlclose(stdio);
} else {
fprintf(stderr, "Failed to open underlying libc.\n");
result = -1;
}
return result;
}
int puts(const char* str)
{
printf("Arerere");
real_puts =dlsym(RTLD_NEXT, "puts");
return real_puts(str);
}
