TOPS-10 Monitor Calls Manual Volume 2 AA-K039D ... - Trailing-Edge

FILE DAEMON
When a File Daemon is running, the monitor calls it every time someone
tries to access a file or a directory that has a 4, 57 6, or 7 code in
the owner's protection code field and the access fails due to a
protection error. So that the monitor knows there is a File Daemon,
the following must occur:
1. The feature test switch F%FDAE must be set to -1,
the condition.
to enable
2. The program that will be the File Daemon must be privileged
(that is, it must be running under [1,2] or running with the
JACCT bit set).
3. This program must send an IPCF request to [SYSTEM] IPCC (code
6, .IPCSC) requesting a special PID.
4. This program must then send a request to [SYSTEM] IPCC
specifying code 24 (.IPCWP). This code requests that the
File Daemon's PID be entered in the Special PID table.
After each request to [SYSTEM] IPCC, the File Daemon receives
verification that the function occurred. After the verification
resulting from the File Daemon specifying code 24, the monitor sends
an IPCF packet to the File Daemon each time that a protection failure
occurs on a file or a directory.
The message portion of the IPCF packet that the monitor sends
to the
File Daemon when a protection failure occurs has the following format:
+---------------------------------------------------------------------+
Type of access I Code
File structure name
File name
File name extension
Project number
Programmer number
Sub-file directory 1 or 0
Sub-file directory 2 or 0
Sub-file directory 3 or 0
Sub-file directory 4 or 0
Sub-file directory 5 or 0
+---------------------------------------_._----------------------------+
In this data block, the type of access is the type of access being
attempted to the file. The Access Type Codes are listed in Table C-2.
And code is a File Daemon Code, which are listed in Table C-3.
The remaining words in the IPCF packet message are the full file
specification for the file being accessed.
B-10