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       bcomps - biconnected components filter for graphs


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


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


       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


       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.


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


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


       Emden R. Gansner <>


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

                                         18 November 2003                               BCOMPS(1)