dgrep, degrep, dfgrep, dzgrep -- grep through files belonging to an installed Debian package
dgrep [most grep options] pattern package...
dgrep --help
dgrep invokes grep(1) on each file in one or more installed Debian packages.
It passes the package argument(s) to dglob(1) to retrieve a list of files in those packages. It uses dglob’s substring pattern matching for the package names.
If dgrep is invoked as degrep, dfgrep or dzgrep, etc. then grep(1) with option "-E" or "-F" respectively the command zgrep(1) is used instead of grep(1).
dgrep supports most of grep(1)’s options. Please refer to your grep(1) documentation (i.e. the manpage or the texinfo manual) for a complete listing. Only a few options are excluded because they do not conform with the intended behaviour, see the list below.
Options of grep that are not supported by dgrep
-r, --recursive, -d recurse, --directories=recurse
-d read, --directories=read
dgrep searches only in the "normal" files of a package. It skips all directories and symlinks. Therefore the options of grep that are specific to directories are not supported.
Matt Zimmerman <mdz AT debian DOT org>
This manpage was written by Frank Lichtenheld <frank AT lichtenheld DOT de>.
Copyright (C) 2001 Matt Zimmerman <mdz AT debian DOT org>.
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version.
On Debian systems, a copy of the GNU General Public License version 2 can be found in /usr/share/common-licenses/GPL-2.