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  dif-
              ferent 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 com-
       ponents and their subgraphs may conflict with existing subgraph names.

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