bcomps(1)


NAME

   bcomps - biconnected components filter for graphs

SYNOPSIS

   bcomps [ -stvx?  ] [ -ooutfile ] [ files ]

DESCRIPTION

   bcomps  decomposes  graphs  into their biconnected components, printing
   the components to standard output.

OPTIONS

   The following options are supported:

   -s     No output graph is printed. Implies the -v flag.

   -t     Print the underlying block-cutvertex tree.

   -x     Each biconnected component is printed as a separate root graph.

   -v     Prints number of blocks and cutvertices.

   -o outfile
          If specified, each root graph will be  written  to  a  different
          file with the names derived from outfile. In particular, if both
          -o and -x flags are used,  then  each  block  is  written  to  a
          different file. If outfile does not have a suffix, the nth block
          of the ith graph is written to  outfile_n_i.  However,  the  0th
          block of the 0th graph is written to outfile.

          If  outfile  has a suffix, i.e., has the form base.sfx, then the
          files will have the same name as  above,  except  appended  with
          .sfx.

          The block-cutvertex tree of ith graph is written to outfile_n_T,
          with an appended suffix if specified.

   By default, each input graph is printed, with each  block  given  as  a
   subgraph  whose name is a concatenation of the name of the input graph,
   the string "_bcc_" and the number of the block.

OPERANDS

   The following operand is supported:

   files   Names of files containing 1 or more graphs in dot  format.   If
           no files operand is specified, the standard input will be used.

RETURN CODES

   bcomps  returns 0 if all the input graphs are biconnected; and non-zero
   if any graph has multiple blocks, or any error occurred.

BUGS

   It is possible, though unlikely, that  the  names  used  for  connected
   components  and  their  subgraphs  may  conflict with existing subgraph
   names.

AUTHORS

   Emden R. Gansner <erg@research.att.com>

SEE ALSO

   ccomps(1), gc(1), dot(1), gvpr(1), gvcolor(1),  acyclic(1),  sccmap(1),
   tred(1), libgraph(3)

                           18 November 2003                      BCOMPS(1)


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