.TH NOP 1 "21 March 2001"
.SH NAME
nop \- pretty-print graph file
.SH SYNOPSIS
.B nop
[
.B \-p?
]
[ 
.I files 
]
.SH DESCRIPTION
.B nop
reads a stream of graphs and prints each in pretty-printed (canonical) format
on stdout. If no
.I files
are given, it reads from stdin.
.SH OPTIONS
The following options are supported:
.TP
.B \-p
Produce no output - just check the input for valid DOT.
.TP
.B \-?
Print usage information.
.SH "EXIT STATUS"
If any errors occurred while processing any input, such as a file
not found or a file containing illegal DOT, a non-zero exit value
is returned. Otherwise, zero is returned.
.SH "SEE ALSO"
wc(1), acyclic(1), gvpr(1), gvcolor(1), ccomps(1), sccmap(1), tred(1), libgraph(3)