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linux/tools/power/cpupower
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Michal Privoznik ad1d8313cd tools / cpupower: Correctly detect if running as root 
Some operations, like frequency-set, need root privileges. However,
the way that this is detected is not correct. The getuid() is called,
while in fact geteuid() should be. This way we can allow
distributions or users to set SETUID flags on the cpupower binary if
they want to and let regular users change the cpu frequency governor.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Acked-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-19 23:01:03 +01:00
..
bench cpupower: bench: parse.c: Fix several minor errors 2014-07-30 01:57:13 +02:00
debug cpufreq: Make linux-pm@vger.kernel.org official mailing list 2014-05-01 01:15:32 +02:00
lib cpupowerutils: increase MAX_LINE_LEN 2011-07-29 18:35:40 +02:00
man cpupower: Remove mc and smt power aware scheduler info/settings 2014-05-17 00:36:37 +02:00
po cpupowerutils - cpufrequtils extended with quite some features 2011-07-29 18:35:36 +02:00
utils tools / cpupower: Correctly detect if running as root 2014-12-19 23:01:03 +01:00
.gitignore cpupower tools: Update .gitignore for files created in the debug directories 2012-11-27 23:07:18 +01:00
Makefile Merge branches 'acpi-tools' and 'pm-tools' 2014-06-03 23:13:34 +02:00
README cpupower: Remove dead link to homepage, and update the targets built. 2014-05-17 00:36:36 +02:00
ToDo cpupower: Remove dead link to homepage, and update the targets built. 2014-05-17 00:36:36 +02:00

README 

The cpupower package consists of the following elements:

requirements
------------

On x86 pciutils is needed at runtime (-lpci).
For compilation pciutils-devel (pci/pci.h) and a gcc version
providing cpuid.h is needed.
For both it's not explicitly checked for (yet).


libcpupower
----------

"libcpupower" is a library which offers a unified access method for userspace
tools and programs to the cpufreq core and drivers in the Linux kernel. This
allows for code reduction in userspace tools, a clean implementation of
the interaction to the cpufreq core, and support for both the sysfs and proc
interfaces [depending on configuration, see below].


compilation and installation
----------------------------

make
su
make install

should suffice on most systems. It builds libcpupower to put in
/usr/lib; cpupower, cpufreq-bench_plot.sh to put in /usr/bin; and
cpufreq-bench to put in /usr/sbin. If you want to set up the paths
differently and/or want to configure the package to your specific
needs, you need to open "Makefile" with an editor of your choice and
edit the block marked CONFIGURATION.


THANKS
------
Many thanks to Mattia Dongili who wrote the autotoolization and
libtoolization, the manpages and the italian language file for cpupower;
to Dave Jones for his feedback and his dump_psb tool; to Bruno Ducrot for his
powernow-k8-decode and intel_gsic tools as well as the french language file;
and to various others commenting on the previous (pre-)releases of 
cpupower.


        Dominik Brodowski