bug#75911: maint: fix s390 buffer flushes

[Ilya Leoshkevich]

On Tue, 2025-01-28 at 15:37 +0100, Eduard Stefes wrote:

LGTM, but I have several stylistic comments.

> Problem reported by Nick Rosbrook in:
> https://bugs.launchpad.net/ubuntu/+source/rsyslog/+bug/2083700
> 
> align the behavior of dfltcc_inflate to do the same as gzip_inflate
> when it hits a premature EOF

Looking at the style of other gzip commits:
I would capitalize "Align" and add a dot at the end.

> ---
>  dfltcc.c    | 7 ++++++-
>  tests/hufts | 6 ++++--
>  2 files changed, 10 insertions(+), 3 deletions(-)


> diff --git a/dfltcc.c b/dfltcc.c
> index 811c1f8..07726cb 100644
> --- a/dfltcc.c
> +++ b/dfltcc.c
> @@ -18,6 +18,7 @@
>  #include <config.h>
>  
>  #include <stdlib.h>
> +#include <errno.h>
>  
>  #ifdef HAVE_SYS_SDT_H
>  # include <sys/sdt.h>
> @@ -437,7 +438,11 @@ dfltcc_inflate ()
>            if (fill_inbuf (1) == EOF)
>              {
>                /* Premature EOF.  */
> -              return 2;
> +              flush_outbuf();

Here and below: there should be a space before ().

> +              errno = 0;
> +              read_error();
> +              /* Premature EOF.  */

Duplicate comment, I would drop this copy.

> +              __builtin_unreachable();
>              }
>            inptr = 0;
>          }

[...]

Best regards,
Ilya