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From "Ryan Bloom" <...@covalent.net>
Subject SYSVSEM locking not working correctly on HP/UX
Date Wed, 01 May 2002 16:18:50 GMT

The problem is that in Apache we create the semaphore as root, and then
try to use it as a child process running as nobody.  Of course, the
child process doesn't have the rights to access that semaphore.  The
attached patch solves the problem for HP/UX, but how is this working
anywhere?

As a side note, this is actually a bug that has been waiting to bite us
for a while.  Permissions in APR have never been abstracted correctly.
For the next version of APR, somebody will need to really put some
effort into abstracting permissions.  I am more than happy to help, and
I have some thoughts on how to do this, but it will be VERY hard to do
correctly.

Index: build/apr_hints.m4
===================================================================
RCS file: /var/covalent/.CVS/apache-cvs/apr-cvs/build/apr_hints.m4,v
retrieving revision 1.39
diff -u -r1.39 apr_hints.m4
--- build/apr_hints.m4  2002/04/01 21:50:45     1.39
+++ build/apr_hints.m4  2002/05/01 16:11:22
@@ -79,6 +79,7 @@
        APR_ADDTO(CPPFLAGS, [-DHIUX])
        ;;
     *-hp-hpux11.*)
+        APR_SETVAR(apr_lock_method, [USE_FCNTL_SERIALIZE])
        APR_ADDTO(CPPFLAGS, [-DHPUX11 -D_REENTRANT
-D_XOPEN_SOURCE_EXTENDED])
        ;;
     *-hp-hpux10.*)


----------------------------------------------
Ryan Bloom                  rbb@covalent.net
645 Howard St.              rbb@apache.org
San Francisco, CA 



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