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       snntpd - small news server


       snntpd [-t timeout] [-P] [-S] [logger...]


       snntpd  is  a  small  news  server.   It needs to be run under inetd or
       tcpserver, as root or as the owner of /var/spool/sn.  snntpd  does  not
       fork into the background.  It expects to read and write from and to the
       network on descriptors 0 and 1.


       logger...  (usually /usr/bin/logger) is taken to be a logging  program,
       and all log output is piped to it.  If logger...  is not specified, log
       messages are directed to descriptor 2.


       -t timeout
              specifies how long snntpd should wait for input before it  gives
              up and exits.  timeout is in seconds and defaults to 600.

       -P     snntpd includes it’s pid in log output.

       -S     Suppress  NNTP  greeting on startup.  This is useful if you want
              to perform authentication before  running  snntpd,  or  want  to
              provide your own greeting, from a wrapper.


       Posts  are  usually  handled externally by the /usr/sbin/SNPOST script,
       which is  responsible  for  fine-grain  posting  control;  handling  of
       control  messages; and the ultimate distribution of the posted article.

       snntpd permits or denies posting in a very simple manner:

       If /var/spool/sn/.nopost exists, posting is not allowed.

       Otherwise, if the environment variable POSTING_OK is not  set,  posting
       is not allowed.

       Otherwise  if  POSTING_OK  is  set  (to  the  empty string), posting is
       generally allowed, and all POSTed articles  are  piped  to  the  SNPOST
       script,  which  has  the  final  say  in  the  matter.   The  value  of
       $POSTING_OK is not currently used, but is reserved.


              If this file exists, and is a fifo, snntpd will write  the  name
              of  a  newsgroup  into  it as that newsgroup becomes the current
              one.  If the fifo does not exist snntpd will not create it.

              If this file exists, snntpd will  display  its  first  line  and
              exit.   If the file can’t be read or is empty, a default message
              is displayed.  This is useful for temporarily disabling the news
              server while you perform any maintenance.

              See POSTING PERMISSIONS above.

              If  this  script  or  program  exists,  it is invoked instead of
              SNPOST to accept a posted article.

              These files really belong to SNPOST, and it is unfortunate  that
              snntpd has to check for their existence to determine the posting
              flag for the LIST command.  See /usr/sbin/SNPOST.

              If this file exists, its first line is taken as the  description
              of that group for use with the LIST NEWSGROUPS command.

              is  a binary file containing entry times, to support the NEWNEWS

              is an empty file retained for it’s  timestamp,  to  support  the
              NEWGROUPS command.


       If         snntpd        catches        SIGHUP,        the        files
       /var/spool/sn/{.fifo,.noservice,.nopost} (see below) are checked again,
       as they are during startup.  Other signals have default behaviour.


       See  also /usr/sbin/SNPOST for a list of environment variables exported
       by snntpd.

       PATH   The PATH must be set such that snntpd can find SNPOST  in  order
              to  accept  postings.   If  PATH  does  not  include  /usr/sbin,
              /usr/sbin will be appended to it.

              This variable helps determine the site-wide posting policy.  See
              POSTING PERMISSIONS above.

              If  this  value  is  set,  it  is taken to be the dotted-quad IP
              address of the connecting client.  If  it  is  not  set,  snntpd
              attempts to derive it for itself, and then set its value.

              as above, but for the server’s dotted-quad IP.

       SNROOT If this is set and is not empty, the value is used everywhere in
              place of /var/spool/sn, the default news spool directory.


       snsend(8), /usr/sbin/SNPOST