The PCI Utilities
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gollux Library: The list of capabilities is ordered properly
Ordering of our cached list of capabilities now respects the original
order in the device's configuration space.
Latest commit 9c48ed2 Dec 31, 2018
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compat compat/getopt.c: Fixed a typo in declaration of getopt_long() Dec 4, 2010
lib Library: The list of capabilities is ordered properly Dec 31, 2018
maint maint/release: Perl does not have "." in @inc any longer Jun 30, 2018
tests lspci: Decode Multicast Extended Capability Nov 12, 2018
win32 Update win32/ Sep 16, 2009
.gitignore Added example to .gitignore. Feb 17, 2008
COPYING Added a copy of the GPL. Oh, those lawyers... Aug 14, 2009
ChangeLog Released as 3.6.2 Aug 12, 2018
Makefile Released as 3.6.2 Aug 12, 2018
README Docs: Prefer https Oct 14, 2018
README.Windows README.Windows: Replaced broken link to winio Dec 31, 2018
TODO Added a note on the Power Budgeting cap Jan 23, 2010
common.c Avoid "optarg" as an identifier Mar 17, 2018
example.c Coding style cleanup: `for(...)' wants a space. Nov 10, 2008
ls-caps-vendor.c Improved listing of vendor-specific information Jan 22, 2015
ls-caps.c "Function-Level Reset" device capability is displayed for RCiEP Dec 31, 2018
ls-ecaps.c Cosmetic cleanups of the previous commit Dec 31, 2018
ls-kernel.c ls-kernel: use libkmod's default to find modules Dec 31, 2016
ls-map.c Fixed a typo in messages printed in map mode Dec 10, 2013
ls-tree.c lspci: Allow -s with -t to show a subtree Oct 14, 2018
ls-vpd.c VPD: Cleanup Jun 19, 2018
lspci.c lspci: Allow -s with -t to show a subtree Oct 14, 2018
lspci.h lspci: Allow -s with -t to show a subtree Oct 14, 2018 Docs: Prefer https Oct 14, 2018
pci.ids Updated pci.ids to today's snapshot Aug 12, 2018 Clean up man pages Nov 2, 2014
pciutils.h Avoid "optarg" as an identifier Mar 17, 2018
pciutils.lsm Removed "Linux" from the package name May 5, 2006
pciutils.spec Updated specs. May 5, 2006
setpci.c setpci: Add capability names Nov 12, 2018 Enable setpci to target n-th capability of id Oct 14, 2018 Clean up man pages Nov 2, 2014 update-pciids: Download pci.ids over HTTPS Oct 14, 2018


This package contains the PCI Utilities, version @VERSION@.

Copyright (c) 1997--2018 Martin Mares <>

All files in this package can be freely distributed and used according
to the terms of the GNU General Public License, either version 2 or
(at your opinion) any newer version. See for details.

1. What's that?
The PCI Utilities package contains a library for portable access to PCI bus
configuration registers and several utilities based on this library.

In runs on the following systems:

	Linux		(via /sys/bus/pci, /proc/bus/pci or i386 ports)
	FreeBSD		(via /dev/pci)
	NetBSD		(via libpci)
	OpenBSD		(via /dev/pci)
	GNU/kFreeBSD	(via /dev/pci)
	Solaris/i386	(direct port access)
	Aix		(via /dev/pci and odmget)
	GNU Hurd	(direct port access)
	Windows		(direct port access, see README.Windows for caveats)
	CYGWIN		(direct port access)
	BeOS		(via syscalls)
	Haiku		(via /dev/misc/poke)
	Darwin		(via IOKit)
	DOS/DJGPP	(via i386 ports)
	SylixOS		(via /proc/pci)

It should be very easy to add support for other systems as well (volunteers
wanted; if you want to try that, I'll be very glad to see the patches and
include them in the next version).

The utilities include:  (See manual pages for more details)

  - lspci: displays detailed information about all PCI buses and devices.

  - setpci: allows to read from and write to PCI device configuration
    registers. For example, you can adjust the latency timers with it.
    CAUTION: There is a couple of dangerous points and caveats, please read
    the manual page first!

  - update-pciids: download the current version of the pci.ids file.

2. Compiling and (un)installing
Just run "make" to compile the package and then "make install" to install it.
Please note that GNU make is needed on most platforms.

If you want to change the default installation location, please override
the PREFIX variable specified in the Makefile -- e.g., you can use
"make PREFIX=/opt/pciutils install" to create a separate installation
not interfering with the rest of your system.  Setting the DESTDIR variable
will allow you to install to a different directory from the one you intend
to eventually run it from.  This is useful for people who are packaging
pciutils to install on other computers.

There are several options which can be set in the Makefile or overridden
when running make:

  ZLIB=yes/no	Enable support for compressed pci.ids (requires zlib).
		If it is enabled, pciutils will use pci.ids.gz in preference to
		pci.ids, even if the pci.ids file is newer.  If the pci.ids.gz
		file is missing, it will use pci.ids instead.  If you do not
		specify this option, the configure script will try to guess
		automatically based on the presence of zlib.

  DNS=yes/no	Enable support for querying the central database of PCI IDs
		using DNS.  Requires libresolv (which is available on most
		systems as a part of the standard libraries) and tries to
		autodetect its presence if the option is not specified.

  SHARED=yes/	Build libpci as a shared library.  Requires GCC 4.0 or newer.
  no/local	The ABI of the shared library is intended to remain backward
		compatible for a long time (we use symbol versioning to achieve
		that, like GNU libc does).  The value `local' includes the
		right directory name in the binaries, so the utilities can be
		run without installation.  This is not recommended for any
		production builds.

"make install-lib" installs the library together with its header files
for use by other programs.

When you are bored of dumping PCI registers, just use "make uninstall".

3. Getting new IDs
The database of PCI IDs (the pci.ids file) gets out of date much faster
than I release new versions of this package, so it is maintained separately.

It lives at, where you can browse the database,
download the most recent pci.ids file (e.g., by running the update-ids utility)
and also submit new entries.

Alternatively, you can use `lspci -q' to query the central database
for new entries via network.

The pci.ids file is also mirrored at

On Linux systems with a recent enough version of libudev, UDEV's HWDB
database is consulted when pci.ids lacks the device.

4. Getting new versions
The current version of pciutils is available at:

The tarball can be downloaded at the following places: (expect a couple of hours delay)

There is also a public GIT tree at:

5. Using the library
So far, there is only a little documentation for the library except for the
general introduction in the pcilib(7) man page. If you want to use the
library in your programs, please follow the comments in lib/pci.h and in
the example program example.c.

6. Feedback
If you have any bug reports or suggestions, send them to the author.

If you have any new IDs, I'll be very glad to add them to the database.
Just submit them at

Announcements of new versions are sent to
(see for instructions).

					Have fun