[Xenomai-help] preferred uid?

[Xenomai-help] preferred uid?

[luxInteg]

greetings

I normally  compile stuff as an ordinary user,  but   I noticed in this area   
people often compile as root as  kernel  modules are involved.   I note 
xenomai can be compiled either as user or root so  is there a preferred way ?

thanks in advance
luxInteg

Re: [Xenomai-help] preferred uid?

[Thomas Lockhart]

luxInteg wrote:
> greetings
>
> I normally  compile stuff as an ordinary user,  but   I noticed in this area   
> people often compile as root as  kernel  modules are involved.   I note 
> xenomai can be compiled either as user or root so  is there a preferred way ?
>   
The patched kernel and fundamental Xenomai kernel modules must be 
installed and loaded as root, but can in principle be built by any user. 
The userland Xenomai libraries could be built by any user but (for my 
systems anyway) are installed in areas requiring root permissions. Code 
you build yourself on top of userland Xenomai can be built by any user 
(this is what I do), but must be run with a subset of root permissions 
to allow setting thread priorities etc.

hth

                                       - Tom

Re: [Xenomai-help] preferred uid?

[Wolfgang Denk]

Dear luxInteg,

In message <201105101823.50226.lux-integ@domain.hid> you wrote:
> 
> I normally  compile stuff as an ordinary user,  but   I noticed in this area   
> people often compile as root as  kernel  modules are involved.   I note 
> xenomai can be compiled either as user or root so  is there a preferred way ?

You should incorporate the rule to always work as normal user only,
and only in the very few cases where you really need root permissions
(like when installing code into system direcotries or loading kernel
modules) you should use "sudo" or similar.


Short answer: all compilations and all other building of sowtare
should always be done as normal user only, and never ever as root.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@domain.hid
Of course there's no reason for it, it's just our policy.

Re: [Xenomai-help] preferred uid?

[Gilles Chanteperdrix]

On 05/10/2011 07:23 PM, luxInteg wrote:
> greetings
> 
> I normally  compile stuff as an ordinary user,  but   I noticed in this area   
> people often compile as root as  kernel  modules are involved.   I note 
> xenomai can be compiled either as user or root so  is there a preferred way ?

As others have said, compile as ordinary user, run make install or make
modules_install as root, or run "sudo make install". Another reason for
running "make install" as root, is that root privilege is also required
to create the device nodes (/dev/rtheap, /dev/rtp*) needed by Xenomai
applications.

-- 
                                                                Gilles.

Re: [Xenomai-help] preferred uid?

[luxInteg]

On Tuesday 10 May 2011 20:23:43 Gilles Chanteperdrix wrote:
> On 05/10/2011 07:23 PM, luxInteg wrote:
> > greetings
> > 
> > I normally  compile stuff as an ordinary user,  but   I noticed in this
> > area people often compile as root as  kernel  modules are involved.   I
> > note xenomai can be compiled either as user or root so  is there a
> > preferred way ?
> 
> As others have said, compile as ordinary user, run make install or make
> modules_install as root, or run "sudo make install". Another reason for
> running "make install" as root, is that root privilege is also required
> to create the device nodes (/dev/rtheap, /dev/rtp*) needed by Xenomai
> applications.

yes this is my rule of thumb  too

However   as I read through the install file  in the xenomai tarball   I 
noticed  there  was only reference   to 'make install' (at least on x86 
platforms).  i did this   and did not bother with running make.  Is this 
acceptable?

sincerely
luxInteg

Re: [Xenomai-help] preferred uid?

[Gilles Chanteperdrix]

On 05/11/2011 05:31 PM, luxInteg wrote:
> On Tuesday 10 May 2011 20:23:43 Gilles Chanteperdrix wrote:
>> On 05/10/2011 07:23 PM, luxInteg wrote:
>>> greetings
>>>
>>> I normally  compile stuff as an ordinary user,  but   I noticed in this
>>> area people often compile as root as  kernel  modules are involved.   I
>>> note xenomai can be compiled either as user or root so  is there a
>>> preferred way ?
>>
>> As others have said, compile as ordinary user, run make install or make
>> modules_install as root, or run "sudo make install". Another reason for
>> running "make install" as root, is that root privilege is also required
>> to create the device nodes (/dev/rtheap, /dev/rtp*) needed by Xenomai
>> applications.
> 
> yes this is my rule of thumb  too
> 
> However   as I read through the install file  in the xenomai tarball   I 
> noticed  there  was only reference   to 'make install' (at least on x86 
> platforms).  i did this   and did not bother with running make.  Is this 
> acceptable?

As we already told you, it is preferable to run
make
then
sudo make install

For reasons already explained in the three answers you received.

-- 
					    Gilles.

Re: [Xenomai-help] preferred uid?

[luxInteg]

On Wednesday 11 May 2011 16:32:06 Gilles Chanteperdrix wrote:
> On 05/11/2011 05:31 PM, luxInteg wrote:
> > On Tuesday 10 May 2011 20:23:43 Gilles Chanteperdrix wrote:
> >> On 05/10/2011 07:23 PM, luxInteg wrote:
> >>> greetings
> >>> 
> >>> I normally  compile stuff as an ordinary user,  but   I noticed in this
> >>> area people often compile as root as  kernel  modules are involved.   I
> >>> note xenomai can be compiled either as user or root so  is there a
> >>> preferred way ?
> >> 
> >> As others have said, compile as ordinary user, run make install or make
> >> modules_install as root, or run "sudo make install". Another reason for
> >> running "make install" as root, is that root privilege is also required
> >> to create the device nodes (/dev/rtheap, /dev/rtp*) needed by Xenomai
> >> applications.
> > 
> > yes this is my rule of thumb  too
> > 
> > However   as I read through the install file  in the xenomai tarball   I
> > noticed  there  was only reference   to 'make install' (at least on x86
> > platforms).  i did this   and did not bother with running make.  Is this
> > acceptable?
> 
> As we already told you, it is preferable to run
> make
> then
> sudo make install
> 
> For reasons already explained in the three answers you received.

so perhaps you should update the INSTALL file   that accompany released 
tarballs of xenomai  then?

Re: [Xenomai-help] preferred uid?

[Philippe Gerum]

On Thu, 2011-05-12 at 22:01 +0100, luxInteg wrote:
> On Wednesday 11 May 2011 16:32:06 Gilles Chanteperdrix wrote:
> > On 05/11/2011 05:31 PM, luxInteg wrote:
> > > On Tuesday 10 May 2011 20:23:43 Gilles Chanteperdrix wrote:
> > >> On 05/10/2011 07:23 PM, luxInteg wrote:
> > >>> greetings
> > >>> 
> > >>> I normally  compile stuff as an ordinary user,  but   I noticed in this
> > >>> area people often compile as root as  kernel  modules are involved.   I
> > >>> note xenomai can be compiled either as user or root so  is there a
> > >>> preferred way ?
> > >> 
> > >> As others have said, compile as ordinary user, run make install or make
> > >> modules_install as root, or run "sudo make install". Another reason for
> > >> running "make install" as root, is that root privilege is also required
> > >> to create the device nodes (/dev/rtheap, /dev/rtp*) needed by Xenomai
> > >> applications.
> > > 
> > > yes this is my rule of thumb  too
> > > 
> > > However   as I read through the install file  in the xenomai tarball   I
> > > noticed  there  was only reference   to 'make install' (at least on x86
> > > platforms).  i did this   and did not bother with running make.  Is this
> > > acceptable?
> > 
> > As we already told you, it is preferable to run
> > make
> > then
> > sudo make install
> > 
> > For reasons already explained in the three answers you received.
> 
> so perhaps you should update the INSTALL file   that accompany released 
> tarballs of xenomai  then?

Do not hesitate to contribute such update since you are now well aware
of the issue, a simple patch would do. Anything which may help the
Xenomai maintainers to cope with the workload involved in bringing you
that software is welcome.

> 
> _______________________________________________
> Xenomai-help mailing list
> Xenomai-help@domain.hid
> https://mail.gna.org/listinfo/xenomai-help

-- 
Philippe.