CentOS 7.0 - man page for acyclic (centos section 1)
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acyclic - make directed graph acyclic
acyclic [ -nv? ] [ -o outfile ] [ file ]
acyclic is a filter that takes a directed graph as input and outputs a copy of the graph
with sufficient edges reversed to make the graph acyclic. The reversed edge inherits all
of the attributes of the original edge. The optional file argument specifies where the the
input graph is stored; by default, the program reads from stdin.
The following options are supported:
-n No output is produced, though the return value will indicate whether the graph is
acyclic or not.
-v Print information about whether the file is acyclic, has a cycle or is undirected.
causes the output to be written to the specified file; by default, output is writ-
ten to stdout.
-? option causes the program to print usage information.
acyclic returns 0 if the graph is acyclic; 1 if the graph has a cycle; 2 if the graph is
undirected; and 255 if there are any errors.
If the graph is strict and there is a cycle of length 2, the attributes of the reversed
edge are lost.
Some edge attributes are non-symmetric, referring to either the head or tail node. At
present, there is no mechanism or convention for correctly switching or renaming these.
Stephen C. North <firstname.lastname@example.org>
Emden R. Gansner <email@example.com>
gc(1), dot(1), gvpr(1), gvcolor(1), ccomps(1), sccmap(1), tred(1), libgraph(3)
21 March 2001 ACYCLIC(1)
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