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prunehistory - remove file names from Usenet history file
prunehistory [ -f filename ] [ -p ]
Prunehistory modifies the history(5) text file to ``remove'' a set of filenames from it.
The filenames are removed by overwriting them with spaces, so that the size and position
of any following entries does not change.
Prunehistory reads the standard input. The input is taken as a set of lines. Blank lines
and lines starting with a number sign (``#'') are ignored. All other lines are should
consist of a Message-ID followed by zero or more filenames.
The Message-ID is used as the dbz(3) key to get an offset into the text file. If no file-
names are mentioned on the input line, then all filenames in the text are ``removed.'' If
any filenames are mentioned, they are converted into the history file notation. If they
appear in the line for the specified Message-ID then they are removed.
Since innd(8) only appends to the text file, prunehistory does not need to have any inter-
action with it.
-p Prunehistory will normally complain about lines that do not follow the correct for-
mat. If the ``-p'' flag is used, then the program will silently print any invalid
lines on its standard output. (Blank lines and comment lines are also passed
through.) This can be useful when prunehistory is used as a filter for other pro-
grams such as reap.
-f The default name of the history file is <pathdb in inn.conf>/history; to specify a
different name, use the ``-f'' flag.
Written by Rich $alz <firstname.lastname@example.org> for InterNetNews. This is revision 1.7, dated
dbz(3), history(5), inn.conf(5), innd(8).
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