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This patch adds the remaining System V IPC hooks, including the inline
documentation for them in security.h. This includes a restored
sem_semop hook, as it does seem to be necessary to support fine-grained
access.
All of these System V IPC hooks are used by SELinux. The SELinux System
V IPC access controls were originally described in the technical report
available from http://www.nsa.gov/selinux/slinux-abs.html, and the
LSM-based implementation is described in the technical report available
from http://www.nsa.gov/selinux/module-abs.html.
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