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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

              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.


       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


       Emden R. Gansner <>


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

                               18 November 2003