On Wed, Jun 24, 2020 at 03:29:57PM +0200, Daniel Gröber wrote: > Currently the BUFFER_SIZE macro doesn't take negative 'ret' values into > account. A negative return should just be passed through to the caller, > snprintf will already have set 'errno' properly. Series applied, thanks. > diff --git a/include/internal/internal.h b/include/internal/internal.h > index bb44e12..b1fc670 100644 > --- a/include/internal/internal.h > +++ b/include/internal/internal.h > @@ -41,6 +41,8 @@ > #endif > > #define BUFFER_SIZE(ret, size, len, offset) \ > + if (ret < 0) \ > + return -1; \ Side note: I don't like this hidden branch under a macro. But snprintf() == -1 is unlikely to happen and I don't have a better idea to deal with this case ATM.