# [PATCH] cat-file --batch: flush stdout also when objects are missing

2 messages from 2008-06-03 to 2008-06-03. Participants: Lea Wiemann, Junio C Hamano.
Thread: https://gitlist.dev/t/13785

## Lea Wiemann, 2008-06-03 18:34

Subject: [PATCH] cat-file --batch: flush stdout also when objects are missing
Message-ID: <1212518057-9137-1-git-send-email-LeWiemann@gmail.com>
URL: https://gitlist.dev/e/1212518057-9137-1-git-send-email-LeWiemann%40gmail.com

```
cat-file --batch/--batch-check only flushes stdout when the object
exists, but not when it doesn't ("<object> missing").  This makes
bidirectional pipes hang.

Signed-off-by: Lea Wiemann <LeWiemann@gmail.com>
---
 builtin-cat-file.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/builtin-cat-file.c b/builtin-cat-file.c
index 200345e..f8b3160 100644
--- a/builtin-cat-file.c
+++ b/builtin-cat-file.c
@@ -159,6 +159,7 @@ static int batch_one_object(const char *obj_name, int print_contents)
 
 	if (get_sha1(obj_name, sha1)) {
 		printf("%s missing\n", obj_name);
+		fflush(stdout);
 		return 0;
 	}
 
-- 
1.5.6.rc0.92.g27fd.dirty

```

## Junio C Hamano, 2008-06-03 19:40

Subject: Re: [PATCH] cat-file --batch: flush stdout also when objects are missing
Message-ID: <7vve0q1f4d.fsf@gitster.siamese.dyndns.org>
URL: https://gitlist.dev/e/7vve0q1f4d.fsf%40gitster.siamese.dyndns.org
In-Reply-To: <1212518057-9137-1-git-send-email-LeWiemann@gmail.com>

```
Lea Wiemann <lewiemann@gmail.com> writes:

> cat-file --batch/--batch-check only flushes stdout when the object
> exists, but not when it doesn't ("<object> missing").  This makes
> bidirectional pipes hang.
>
> Signed-off-by: Lea Wiemann <LeWiemann@gmail.com>
> ---
>  builtin-cat-file.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/builtin-cat-file.c b/builtin-cat-file.c
> index 200345e..f8b3160 100644
> --- a/builtin-cat-file.c
> +++ b/builtin-cat-file.c
> @@ -159,6 +159,7 @@ static int batch_one_object(const char *obj_name, int print_contents)
>  
>  	if (get_sha1(obj_name, sha1)) {
>  		printf("%s missing\n", obj_name);
> +		fflush(stdout);
>  		return 0;
>  	}
>  
> -- 
> 1.5.6.rc0.92.g27fd.dirty

Ah, good catch.

Thanks.

```