Re: latest clone/pull of git.git problems with setlinebuf.

From: Boyd Lynn Gerber <gerberb@zenez.com>
Date: Sep 4, 2008, 05:29 UTC
Message-ID: <alpine.LNX.1.10.0809032325080.25336@suse104.zenez.com>
In-Reply-To: <7vhc8w8rme.fsf@gitster.siamese.dyndns.org>

On Wed, 3 Sep 2008, Junio C Hamano wrote:

Show 21 quoted lines

> Boyd Lynn Gerber <gerberb@zenez.com> writes:
>> On Wed, 3 Sep 2008, Junio C Hamano wrote:
>>> Ah, ok.  I should have noticed that setlinebuf() was outside POSIX (it is
>>> not usable on older BSDs either).
>>>
>>> Let's see if we can replace it with setvbuf() which is POSIX.
>>
>> This fixes the problem. on both OS's.
>
> By the way, have you actually exercised the codepath, or does your above
> "fixes" mean "compiles"?
>
> I knew it would compile on a system with POSIX setvbuf(), but I was 
> unsure about the size argument.  I know for glibc giving <NULL, 0> would 
> be equivalent to setlinebuf(), but POSIX itself leaves what exactly 
> happens to the size argument quite vague, saying only "otherwise [when 
> buf is a null pointer], size may determine the size of a buffer 
> allocated by the setvbuf() function."  Does size=0 mean it allocates 
> very little, and while it tries to line buffer the output, because the 
> buffer is so small that it fails to buffer an entire line causing early 
> flushing of the stream?

I only compiled it.  I am debuging some test errors.  I did a gmake test

This is the test that fails.  Everything before it passes.

*   ok 41: very long name in the index handled sanely
* fixed 1 known breakage(s)
* still have 1 known breakage(s)
* passed all remaining 40 test(s)
*** t0001-init.sh ***
...
*   ok 9: GIT_DIR & GIT_WORK_TREE (2)
* FAIL 10: reinit

                 (
                         unset GIT_CONFIG GIT_WORK_TREE GIT_CONFIG

                         mkdir again &&
                         cd again &&
                         git init >out1 2>err1 &&
                         git init >out2 2>err2
                 ) &&
                 grep "Initialized empty" again/out1 &&
                 grep "Reinitialized existing" again/out2 &&
                 >again/empty &&
                 test_cmp again/empty again/err1 &&
                 test_cmp again/empty again/err2

* FAIL 11: init with --template

                 mkdir template-source &&
                 echo content >template-source/file &&
                 (
                         mkdir template-custom &&
                         cd template-custom &&
                         git init --template=../template-source
                 ) &&
                 test_cmp template-source/file template-custom/.git/file

*   ok 12: init with --template (blank)
* failed 2 among 12 test(s)
gmake[2]: *** [t0001-init.sh] Error 1

-- Boyd Gerber <gerberb@zenez.com> ZENEZ 1042 East Fort Union #135, Midvale Utah 84047