The flush command closes and reopens all open files. An optional site can
be specified, in which case buffchan flushes only that file. This
command is analogous to the ctlinnd flush command. This command can be
sent via innd using ctlinnd send buffchan-site flush site.
Applications can tell that flush has completed by renaming the file before issuing the command. When the original file name has reappeared, the flush is complete. If fchmod(3) is available, buffchan also changes the file to read-only while its actively writing to it and changes it back to read/write once it has been closed. It will change the mode back to read-only only if it reopens the same file.
The drop command is similar to the flush command, except that no files are
reopened. If given an argument, only the specified site is dropped;
otherwise, all sites are dropped. (Note that a site will be restarted if
the input stream mentions the site again.)
When a ctlinnd drop site command is sent, innd will automatically forward the command to buffchan if the site is listed as a funnel feeding into the buffchan exploder. To drop all sites, use ctlinnd send buffchan-site drop.
|!readmap||The map file specified with the -m option, if given, will be reloaded.|
-b Force the output to be buffered. (This is generally the default, but it may depend on the operating system.) If -b is given, a buffer size of BUFSIZ (a constant of the system standard I/O library) is used. -c lines If the -c flag is given, buffchan will close and reopen a file after every lines lines are written to the file. -C seconds If the -C flag is given, buffchan will close and reopen a file if it has been open for more than seconds seconds. -d directory This flag may be used to specify a directory the program should change to before starting. If this flag is used, the default for the -s flag (see below) is changed to be a simple %s (in other words, output files are considered to be relative to directory). -f num-fields By default, each line is expected to contain one fixed field followed by some number of filename fields. If this flag is given, num-fields will be used as the number of initial fixed fields. -l lines If the -l flag is given, buffchan will flush the output after every lines lines are written to a file. -L seconds If the -L flag is given, buffchan will flush each output file every seconds seconds. -m map Map files translate the names in the filename fields on each line into filenames that should be used instead. Its used primarily when short names are used in newsfeeds, but the output files should use the full domain names of remote peers.
In the map file, blank lines and lines starting with a number sign (#) are ignored. All other lines should have two host names separated by a colon. The first field is the name that may appear in the input stream; the second field names the file to be used when the name in the first field appears. For example:
# This is a comment uunet:news.uu.net foo:foo.com munnari:munnari.oz.au
-p pid-file If the -p option is given, buffchan will write a line containing its process ID (in text) to the specified file when it starts. -r By default, buffchan sends its error messages to pathlog/errlog. To suppress this redirection and send error messages to standard error, use the -r flag. -s The -s flag may be used to specify a format that maps a filename from the filename fields at the end of each line to an actual filename. This is a sprintf(3) format string that should contain a single instance of %s, which will be replaced with the value of the filename field (possibly after mapping with the map file from -m). The default value is pathoutgoing/%s. -u If the -u flag is used, the output will be unbuffered.
If buffchan is invoked with -f 2 and given the following input:
Then the file foo will have these lines:
the file munnari will have these lines:
and the file uunet will have these lines:
Written by Rich $alz <firstname.lastname@example.org> for InterNetNews. Converted to POD by Russ Allbery <email@example.com>.
$Id: buffchan.pod 9767 2014-12-07 21:13:43Z iulius $
ctlinnd(8), filechan(8), inn.conf(5), innd(8), newsfeeds(5).
|INN 2.6.0||BUFFCHAN (8)||2015-09-12|