linux-kernel - Re: [PATCH] fread does not return negative on error

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Date:	Wed, 24 Jun 2009 10:18:19 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Junio C Hamano <gitster@...ox.com>
Cc:	René Scharfe <rene.scharfe@...fire.ath.cx>,
	roel kluin <roel.kluin@...il.com>, git@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] fread does not return negative on error


* Junio C Hamano <gitster@...ox.com> wrote:

> René Scharfe <rene.scharfe@...fire.ath.cx> writes:
> 
> > the following patch is for git.  I just removed the unneeded check for
> > res == 0 from your version.  Does it look OK?
> 
> The patch looks good, and both of our in-tree users do error out 
> when the returned value is 0 (imap-send.c checks with "<= 0" which 
> looks a tad amateurish, though) correctly.
> 
> Funny, there is no caller of this function in the original context 
> this bug originally found, which I think is linux-2.6/tools/perf 
> ;-).

Hehe, yes :-)

Background: when creating tools/perf/ i cherry-picked all the nice 
Git libraries into tools/perf/util/, to give a standard environment 
for all tooling things that might come up in the future.

Some of those are not used yet but it looked more logical to pick up 
whole pieces - some already gained uses. For example config.c is not 
truly used yet, but very much expected to have a role in the future.

( The only invasive thing i had to do was the s/git_/perf_/ mass 
  rename across all the files - having 'git_' in perf looked
  quite confusing. )

And our general experience with the Git libraries in 
tools/perf/util/* is: we love them!

For example parse-options.c is a striking improvement compared to 
getopt.h we used before, and all the other facilities are sane and 
straight to the point as well. So in this sense 'perf' is an ... 
interesting cross-discipline 'fork' of Git's generic libraries.

The auto-generation of everything out of Documentation/*.txt is 
another thing we picked up, and that's very nice too.

One bookeeping issue: i found few explicit credits in those files - 
so i noted in the changelog that i took them from Git and i noted 
the specific upstream Git sha1 when i copied them. Would be nice to 
update each file with names to make credit more explicit:

-rw-rw-r-- 1 mingo mingo  2808 2009-06-23 10:49 abspath.c
-rw-rw-r-- 1 mingo mingo  1447 2009-06-23 10:49 alias.c
-rw-rw-r-- 1 mingo mingo  4660 2009-06-23 10:49 cache.h
-rw-rw-r-- 1 mingo mingo  4817 2009-06-23 10:49 color.c
-rw-rw-r-- 1 mingo mingo  1187 2009-06-23 10:49 color.h
-rw-rw-r-- 1 mingo mingo 19149 2009-06-23 10:49 config.c
-rw-rw-r-- 1 mingo mingo  1041 2009-06-23 10:52 ctype.c
-rw-rw-r-- 1 mingo mingo   256 2009-06-23 10:49 environment.c
-rw-rw-r-- 1 mingo mingo  3262 2009-06-23 10:49 exec_cmd.c
-rw-rw-r-- 1 mingo mingo   496 2009-06-23 10:49 exec_cmd.h
-rw-rw-r-- 1 mingo mingo  8515 2009-06-23 10:49 help.c
-rw-rw-r-- 1 mingo mingo   751 2009-06-23 10:49 help.h
-rw-rw-r-- 1 mingo mingo  2592 2009-06-23 10:49 levenshtein.c
-rw-rw-r-- 1 mingo mingo   201 2009-06-23 10:49 levenshtein.h
-rw-rw-r-- 1 mingo mingo  1909 2009-06-23 10:49 pager.c
-rw-rw-r-- 1 mingo mingo 12454 2009-06-23 10:49 parse-options.c
-rw-rw-r-- 1 mingo mingo  5693 2009-06-23 10:49 parse-options.h
-rw-rw-r-- 1 mingo mingo  7986 2009-06-23 10:49 path.c
-rw-rw-r-- 1 mingo mingo 10442 2009-06-23 10:49 quote.c
-rw-rw-r-- 1 mingo mingo  2667 2009-06-23 10:49 quote.h
-rw-rw-r-- 1 mingo mingo  7966 2009-06-23 10:49 run-command.c
-rw-rw-r-- 1 mingo mingo  2838 2009-06-23 10:49 run-command.h
-rw-rw-r-- 1 mingo mingo   969 2009-06-23 10:49 sigchain.c
-rw-rw-r-- 1 mingo mingo   215 2009-06-23 10:49 sigchain.h
-rw-rw-r-- 1 mingo mingo  7270 2009-06-23 10:49 strbuf.c
-rw-rw-r-- 1 mingo mingo  4995 2009-06-23 10:49 strbuf.h
-rw-rw-r-- 1 mingo mingo   556 2009-06-23 10:52 string.c
-rw-rw-r-- 1 mingo mingo   120 2009-06-23 10:52 string.h
-rw-rw-r-- 1 mingo mingo 13859 2009-06-24 10:01 symbol.c
-rw-rw-r-- 1 mingo mingo  1112 2009-06-23 10:52 symbol.h
-rw-rw-r-- 1 mingo mingo  1690 2009-06-23 10:49 usage.c
-rw-rw-r-- 1 mingo mingo  9878 2009-06-23 10:52 util.h
-rw-rw-r-- 1 mingo mingo  4249 2009-06-23 10:49 wrapper.c

	Ingo
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