string_unescape
dst += string_unescape(src, dst, 0, UNESCAPE_OCTAL) + 1;
int string_unescape(char *src, char *dst, size_t size, unsigned int flags);
return string_unescape(buf, buf, 0, flags);
return string_unescape(src, dst, size, UNESCAPE_ANY);
EXPORT_SYMBOL(string_unescape);
q_real = string_unescape(in, out_real, q_real, flags);