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.
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 <email@example.com>
ccomps(1), gc(1), dot(1), gvpr(1), gvcolor(1), acyclic(1), sccmap(1),
18 November 2003