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Help with scripting APT / dpkg in Debian 4

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Old 10-20-2008
Help with scripting APT / dpkg in Debian 4
Hello,

I am attempting to write a (bash) shell script that will do some basic reporting based on the APT utilities and dpkg.

I need the following in the report:
Packages installed
(COLUMNS=200 dpkg -l | grep '/^ii/' > packages_installed)

Packages not installed
I suppose that I can do
COLUMNS=200 dpkg -l > packages_available
and then use cmp or diff to print a list of the differences which should just be the packages not installed

Packages with security updates
I'm drawing a blank on this one, maybe restricting sources to
deb Debian -- Security Information stable/updates main
and printing the output

Packages with updates
I think it's just
apt-get -u upgrade > packages_updates

Packages with new versions (including the distro)
apt-cache show?

The script should then print out in a legible form the different categories from the files created. I realize that there are some GUI's out there that do basically the same thing but this will run on servers. Ideally it should be dependent on the "standard" apt utilities.

Thanks for any input!
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LEARN ABOUT LINUX

dpkg::control

Dpkg::Control(3)						   libdpkg-perl 						  Dpkg::Control(3)

NAME

       Dpkg::Control - parse and manipulate official control-like information

DESCRIPTION

       The Dpkg::Control object is a smart version of Dpkg::Control::Hash.  It associates a type to the control information. That type can be used
       to know what fields are allowed and in what order they must be output.

       The types are constants that are exported by default. Here's the full list:

       CTRL_UNKNOWN
	   This type is the default type, it indicates that the type of control information is not yet known.

       CTRL_INFO_SRC
	   Corresponds to the first block of information in a debian/control file in a Debian source package.

       CTRL_INFO_PKG
	   Corresponds to subsequent blocks of information in a debian/control file in a Debian source package.

       CTRL_INDEX_SRC
	   Corresponds to an entry in a Sources file of an APT source package repository.

       CTRL_INDEX_PKG
	   Corresponds to an entry in a Packages file of an APT binary package repository.

       CTRL_PKG_SRC
	   Corresponds to a .dsc file of a Debian source package.

       CTRL_PKG_DEB
	   Corresponds to the control file generated by dpkg-gencontrol (DEBIAN/control) and to the same file inside .deb packages.

       CTRL_FILE_CHANGES
	   Corresponds to a .changes file.

       CTRL_FILE_VENDOR
	   Corresponds to a vendor file in /etc/dpkg/origins/.

       CTRL_FILE_STATUS
	   Corresponds to an entry in dpkg's status file (/var/lib/dpkg/status).

       CTRL_CHANGELOG
	   Corresponds to the output of dpkg-parsechangelog.

FUNCTIONS

       All the methods of Dpkg::Control::Hash are available. Those listed below are either new or overridden with a different behaviour.

       my $c = Dpkg::Control->new(%opts)
	   If the "type" option is given, it's used to setup default values for other options. See set_options() for more details.

       $c->set_options(%opts)
	   Changes the value of one or more options. If the "type" option is changed, it is used first to define default values for others
	   options. The option "allow_pgp" is set to 1 for CTRL_PKG_SRC and CTRL_FILE_CHANGES and to 0 otherwise. The option "drop_empty" is set
	   to 0 for CTRL_INFO_PKG and CTRL_INFO_SRC and to 1 otherwise. The option "name" is set to a textual description of the type of control
	   information.

	   The output order is also set to match the ordered list returned by Dpkg::Control::Fields::field_ordered_list($type).

       $c->get_type()
	   Returns the type of control information stored. See the type parameter set during new().

AUTHOR

       Raphael Hertzog <hertzog@debian.org>.

1.16.0.3							    2012-04-17							  Dpkg::Control(3)