Fix sem_getvalue

[Paul Kunysch <paul.kunysch@emsys.de>]

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Hello

In 1.7.24 and 1.7.25 sem_getvalue() returns the current value instead of 
setting the out-parameter and returning 0/-1 for success/error.

I attached a simple fix.

I don't know if this should be further improved by setting errno to 
EINVAL if STATUS_INVALID_HANDLE == status.

Unfortunately I wasn't able to run and extend the unit tests.  Running 
"make check" fails with "No rule to make target `dataascii.o', needed by 
`libltp.a'".  The VPATH seems to be extended correctly.

Kind regards,
Paul
-- 

Kunysch, Paul
Software Development

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Index: winsup/cygwin/thread.cc
===================================================================
RCS file: /cvs/src/src/winsup/cygwin/thread.cc,v
retrieving revision 1.285
diff -u -p -r1.285 thread.cc
--- winsup/cygwin/thread.cc	23 Jul 2013 14:15:20 -0000	1.285
+++ winsup/cygwin/thread.cc	17 Sep 2013 17:45:26 -0000
@@ -3443,9 +3443,8 @@ semaphore::_getvalue (int *sval)
 
   status = NtQuerySemaphore (win32_obj_id, SemaphoreBasicInformation, &sbi,
 			     sizeof sbi, NULL);
-  if (NT_SUCCESS (status))
-    return sbi.CurrentCount;
-  return startvalue;
+  *sval = (NT_SUCCESS(status)) ? sbi.CurrentCount : startvalue;
+  return 0;
 }
 
 int

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