nop man page
nop — pretty-print graph file
nop [ -p? ] [ files ]
nop reads a stream of graphs and prints each in pretty-printed (canonical) format on stdout. If no files are given, it reads from stdin.
The following options are supported:
Produce no output - just check the input for valid DOT.
Print usage information.
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.
wc(1), acyclic(1), gvpr(1), gvcolor(1), ccomps(1), sccmap(1), tred(1), libgraph(3)