xfstests: fix to build src/realpath and the correct the existence of target devices

Hi Rich, Eric

(2012/10/27 1:46), Rich Johnston wrote:
> On 06/08/2010 03:03 PM, Eric Sandeen wrote:
>> If you try running xfstests on lvm volumes which are symlinks,
>> it'll fail to run several tests because our _require_scratch
>> framework ultimately uses lstat not stat, and does not think
>> the lvm device (which is usually a symlink to a dm-X device)
>> is a block device.  Sigh.
>>
>> Last try at this - just resolve any symlinked devicenames
>> into their realpath(3) in common.config.
>>
>> This actually seems to work.
>>
>> Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
>>
>> ---
>>
>>
>> diff --git a/common.config b/common.config
>> index 926846b..e5b2483 100644
>> --- a/common.config
>> +++ b/common.config
> 
> Looks good
> 
> Reviewed-by: Rich Johnston <rjohnston@sgi.com>
> 
> Eric,
> 
> This patch has been committed to git://oss.sgi.com/xfs/cmds/xfstests, master branch, commit ID d5ea873f.

From: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>

Commit d5ea873f is not the same as the the following original Eric's patch.

http://oss.sgi.com/archives/xfs/2010-06/msg00080.html

It does not modify src/Makefile and realpath is never compiled.

In addition, `[ -L $TEST_DEV ]' and `[ -L $SCRATCH_DEV ]' always returns 0
if $TEST_DEV or $SCRATCH_DEV are not defined.

Cc: Eric Sandeen <sandeen@sandeen.net>
Cc: Rich Johnston <rjohnston@sgi.com>
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Reviewed-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Rich Johnston <rjohnston@sgi.com>
Signed-off-by: Rich Johnston <rjohnston@sgi.com>

common.config

@@ -221,11 +221,11 @@ else
 fi
 
 # Scripts just don't deal well with symlinked devices
-if [ -L $TEST_DEV ]; then
+if [ -L "$TEST_DEV" ]; then
         TEST_DEV=`src/realpath $TEST_DEV`
 fi
 
-if [ -L $SCRATCH_DEV ]; then
+if [ -L "$SCRATCH_DEV" ]; then
         SCRATCH_DEV=`src/realpath $SCRATCH_DEV`
 fi
 

src/Makefile

@@ -11,7 +11,7 @@ TARGETS = dirstress fill fill2 getpagesize holes lstat64 \
 	devzero feature alloc fault fstest t_access_root \
 	godown resvtest writemod makeextents itrash rename \
 	multi_open_unlink dmiperf unwritten_sync genhashnames t_holes \
-	t_mmap_writev
+	t_mmap_writev realpath
 
 LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \
 	preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \