fmtstr一些源码学习

Created2024-08-13|Updated2024-09-23|userpwn

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1. printf

a.__printf

int
__printf (const char *format, ...)
{
  va_list arg;
  int done;

  va_start (arg, format);
  done = __vfprintf_internal (stdout, format, arg, 0);
  va_end (arg);

  return done;
}

#undef _IO_printf
ldbl_strong_alias (__printf, printf);
ldbl_strong_alias (__printf, _IO_printf);