From Linux Man Pages
ccomps - connected components filter for graphs
ccomps [ -sxv? ] [ -ooutfile ] [ files ]
DESCRIPTION
ccomps decomposes graphs into their connected components, printing the components to standard output.
OPTIONS
The following options are supported:
-s No output graph is printed. Implies the -v flag.
-x Only the connected components are printed, as separate graphs.
-v Counts of nodes, edges and connected components are printed.
-C Use clusters in computing components in addition to normal edge connectivity. In essence, this gives the
connected components of the derived graph in which nodes top-level clusters and nodes in the original
graph. This maintains all subgraph structure within a component, even if a subgraph does not contain any
nodes.
-n Do not project subgraph structure. Normally, if ccomps produces components as graphs distinct from the
input graph, it will define subgraphs which are projections of subgraphs of the input graph onto the com-
ponent. (If the projection is empty, no subgraph is produced.) If this flag is set, the component con-
tains only the relevant nodes and edges.
-X node_name
Prints only the component containing the node node_name, if any.
-X# index
Prints only component number index, if any, starting at 0.
-o outfile
If specified, each graph will be written to a different file with the names derived from outfile. In par-
ticular, if both -o and -x flags are used, then each connected component is written to a different file.
If outfile does not have a suffix, the first file will have the name outfile; then next outfile_1, then
next outfile_2, and so on. If outfile has a suffix, i.e., has the form base.sfx, then the files will be
named base.sfx, base_1.sfx, base_2.sfx, etc.
By default, each input graph is printed, with each connected component given as a subgraph whose name is a con-
catenation of the name of the input graph, the string "_component_" and the number of the component.
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
Unless used to extract a single connected component, ccomps returns 0 if all the input graphs are connected; and
non-zero if any graph has multiple components, or any error occurred. If just extracting a single component,
ccomps returns 0 on success and non-zero if an error occurred.
BUGS
It is possible, though unlikely, that the names used for connected components and their subgraphs may conflict
with existing subgraph names.
RELATED
gc(1), dot(1), gvpr(1), gvcolor(1), acyclic(1), sccmap(1), tred(1), libgraph(3)
CATEGORY