With this patch, the IPC service is changed to use the new RMIB
facility to register and handle the "kern.ipc" sysctl subtree itself.
The subtree was previously handled by the MIB service directly. This
change improves locality of handling: especially the
kern.ipc.sysvipc_info node has some peculiarities specific to the IPC
service and is therefore better handled there. Also, since the IPC
service is essentially optional to the system, this rearrangement
yields a cleaner situation when the IPC service is not running: in
that case, the MIB service will expose a few basic kern.ipc nodes
indicating that no SysV IPC facilities are present. Those nodes will
be overridden through RMIB when the IPC service is running.
It should be easier to add the remaining (from NetBSD) kern.ipc nodes
as well now.
Test88 is extended with a new subtest that verifies that sysctl-based
information retrieval for semaphore sets works as expected.
Change-Id: I6b7730e85305b64cfd8418c0cc56bde64b22c584
- rewrite the semop(2) implementation so that it now conforms to the
specification, including atomicity, support for blocking more than
once, range checks, but also basic fairness support;
- fix permissions checking;
- fix missing time adjustments;
- fix off-by-one errors and other bugs;
- do not allocate dynamic memory for GETALL/SETALL;
- add test88, which properly tests the semaphore functionality.
Change-Id: I85f0d3408c0d6bba41cfb4c91a34c8b46b2a5959
Closer to KNF, better coding practices, more similar to other
services, no more global variables, a few more comments, that
kind of stuff. No major functional changes.
Change-Id: I6e8f53bfafd6f41e92031fba76c40a31d2107a8e
