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       snfetch - fetch articles.


       snfetch [-r] [-t timeout] [-c depth] group [serial [max]]


       snfetch  expects to read NNTP from file descriptor 6, and write NNTP to
       file descriptor 7, which  descriptors  must  have  already  been  open.
       Articles retrieved are written to descriptor 1.  Each article displayed
       is separated from the next by  a  dot  on  a  line  by  itself.   These
       articles  are  NNTP safe, in the sense that double-dot unquoting is not
       done, and all lines end in CR-LF.  snfetch expects to begin  it’s  NNTP
       speech  by  giving  the  GROUP command.  The upstream server’s greeting
       must have already been read some other way.  Likewise, when snfetch  is
       done, it will not send a QUIT command.

       The output is suitable for feeding to snstore.

       snfetch  always checks the article ID of the prospective article before
       retrieving it.  If the ID  already  exists  in  the  ID  database,  the
       article  will not be retrieved.  Note that this does not guarantee that
       all articles retrieved will be unique.

       snfetch does not guarantee to leave the NNTP conversation in  a  decent
       state (there might be more data to read, but snfetch aborted part way).

       You will need to be root or own /var/spool/sn  in  order  to  run  this

       It  is  not  safe to direct the output of several snfetches to the same
       pipe descriptor, but a file descriptor is all right.


       -t timeout
              snfetch will wait only timeout seconds (default  180)  for  data
              before giving up, if the server doesn’t respond.

       -r     Output in news batch format instead.  All articles will take the
              #! rnews form only, even if there is just one article, all lines
              end in bare linefeed, and dot-unquoting is performed.

       -c depth
              Employ   a  command  pipeline  of  depth  depth.   NNTP  command
              pipelining is  not  officially  sanctioned,  so  by  default  no
              pipeline is used.  However, a pipeline with a depth greater than
              0 will substantally reduce transaction  latency  if  the  server
              accepts  it.   A  respectable value for depth might be between 1
              and 5.


       snfetch takes the name of a single newsgroup on its command  line.   If
       serial  is given, this is taken to be the first article number on group
       on the server to fetch.  If max is specified, this is taken to  be  the
       maximum  number  of articles to fetch.  The first article retrieved may
       be after serial if max would be violated.  If  max  is  not  specified,
       there is no limit.


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


              If serial is not specified, the starting serial number is  taken
              from the file /var/spool/sn/newsgroup/.serial.  This defaults to
              0 if the file can’t be read.

              If snfetch exits with success (0), the  new  serial  is  written
              into       this       file.        The       original       file
              /var/spool/sn/newsgroup/.serial is readonly by snfetch.

              If max is not specified on the command line, max  is  read  from
              this  file.  If the file cannot be read or does not exist, there
              is no limit.


       snfetch exits 1 on usage error, 2 on  system  failure,  3  on  protocol
       error, 4 on read timeout, and 0 on success.


       snstore (8), snget (8)