add ifquery manpage

doc/ifquery.scd

@@ -0,0 +1,66 @@
+ifquery(8)
+
+# NAME
+
+ifquery - query interface configuration and state
+
+# SYNOPSIS
+
+*ifquery* [<_options_>...] <_interfaces_...>
+
+*ifquery* -L|--list
+
+*ifquery* -s|--state
+
+# DESCRIPTION
+
+*ifquery* is used to extract information from the interface configuration
+file.  It can also be used to convert from old versions of the interface
+configuration file to the current format.
+
+# OPTIONS
+
+*-a, --auto*
+	Only match interfaces that are marked as _auto_.
+
+*-h, --help*
+	Display supported options to ifquery.
+
+*-i, --interfaces* _FILE_
+	Use _FILE_ as the config database.
+
+*-s, --state*
+	Query the state database instead of the config database.
+
+*-D, --dot*
+	Generate a dependency graph that can be used with GraphViz
+	*dot*(1).  Used with *--list*.
+
+*-I, --include* _PATTERN_
+	Include _PATTERN_ when matching against the config or state
+	database.
+
+*-L, --list*
+	List interfaces which exist in the configuration database.
+
+*-P, --pretty-print*
+	When listing interfaces, print their configuration in a format
+	that is compatible with *interfaces*(5) files.
+
+*-S, --state-file* _FILE_
+	Use _FILE_ as the state database.
+
+*-V, --version*
+	Print the ifupdown-ng version and exit.
+
+*-X, --exclude* _PATTERN_
+	Exclude _PATTERN_ when matching against the config or state
+	database.
+
+# SEE ALSO
+
+*ifup*(8), *ifdown*(8), *interfaces*(5)
+
+# AUTHORS
+
+Ariadne Conill <ariadne@dereferenced.org>