AT&T UNIX™PC Unix System V Users Manual - tenox

ADMIN(l) ADMIN(l)
Note that use of this keyletter on a truly
corrupted file may prevent future detection
of the corruption.
Fll.ES
The last component of all sees file names must be of the form
s.file-name. New sees files are given mode 444 (see chmod(l)).
Write permission in the pertinent directory is, of course, required
to create a file. All writing done by admin is to a temporary xfile,
called x.file-name, (see get(!)), created with mode 444 if the
admin command is creating a new sees file, or with the same
mode as the sees file if it exists. After successful execution of
admin, the sees file is removed (if it exists), and the x-file is
renamed with the name of the sees file. This ensures that
changes are made to the sees file only if no errors occurred.
It is recommended that directories containing sees files be mode
755 and that sees files themselves be mode 444. The mode of the
directories allows only the owner to modify sees files contained in
the directories. The mode of the sees files prevents any
modification at all except by sees commands.
If it should be necessary to patch an sees file for any reason, the
mode may be changed to 644 by the owner allowing use of ed(l).
Care must be taken! The edited file should always be processed by
an admin -h to check for corruption followed by an admin -z
to generate a proper check-sum. Another admin -h is recommended
to ensure the sees file is valid.
Admin also makes use of a transient lock file (called z.file-name ),
which is used to prevent simultaneous updates to the sees file by
different users. See get(l) for further information.
SEE ALSO
delta( I), ed(l), get( I), help( I), prs(l), what( I), sccsfile( 4).
Source Code Control System User's Guide in the UNIX System
Us er's Guide .
DIAGNOSTICS
Use help(!) for explanations.
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