grephistory - display file names from Usenet history file


   grephistory [ -f filename ] [ -e ] [ -n ] [ -q ] [ -l ] [ -t ] [ -i ] [
   -s ] [ messageid ]


   Grephistory queries the dbz(3) index into the history(5)  file  for  an
   article having a specified Message-ID.

   If  messageid cannot be found in the database, the program prints ``Not
   found'' and exits with a non-zero  status.   If  messageid  is  in  the
   database, the program prints the pathname and exits successfully.


   -n     If  no pathname exists, the program will print ``/dev/null'' and
          exit successfully.  This can happen when  an  article  has  been
          cancelled,  or  if  it has been expired but its history is still
          retained.  This is default behaviour, which can be  obtained  by
          using the ``-n'' flag.

   -q     If  the  ``-q'' flag is used, then no message is displayed.  The
          program will still exit with the appropriate exit status.

   -t     If the ``-t'' flag is  used,  then  only  the  offset  into  the
          history text file is printed.

   -e     If the ``-e'' flag is used, then grephistory will only print the
          filename of an existing article.

   -l     If the ``-l'' flag is used then the entire line from the history
          file will be displayed.

   -i     If the ``-i'' flag is used, then grephistory will read a list of
          Message-ID's on standard  input,  one  per  line.   Leading  and
          trailing  whitespace is ignored, as are any malformed lines.  It
          will print on standard output those Message-ID's which  are  not
          found in the history database.  This flag is used in processsing
          ``ihave'' control messages.

   -s     If the ``-s'' flag is used, then grephistory will read a similar
          list  from its standard input.  It will print on standard output
          a list of filenames for each article that  is  still  available.
          This flag is used in processsing ``sendme'' control messages.

   -f     To  specify a different value for the history file and database,
          use the ``-f'' flag.


   Written by Rich $alz <> for  InterNetNews.   This  is
   revision 1.7, dated 1996/11/08.


   dbz(3), history(5).



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