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acyclic (1)
  • >> acyclic (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
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    NAME

    acyclic - make directed graph acyclic
     
    

    SYNOPSIS

    acyclic [ -nv? ] [ -o outfile ] [ file ]  

    DESCRIPTION

    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.  

    OPTIONS

    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.
    -o outfile
    causes the output to be written to the specified file; by default, output is written to stdout.
    -?
    option causes the program to print usage information.
     

    RETURN CODES

    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.  

    BUGS

    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 for correctly switching or renaming these.  

    AUTHORS

    Stephen C. North <north@research.att.com>
    Emden R. Gansner <erg@research.att.com>  

    SEE ALSO

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


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    OPTIONS
    RETURN CODES
    BUGS
    AUTHORS
    SEE ALSO


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