RE: copy some kernel extensions to /tmp directory and then load that kext when program Launches

28 May 2009

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Thread-index: Acne/riWZaJiUV6LQuSmkf5ZeyrLOQAjaCDX
Thread-topic: copy some kernel extensions to /tmp directory and then load that kext when program Launches

Hi,
...
but I don't understand why you don't let the kexts into your app
bundle and then execute from CFBundle Resources directory your
pre-flight script using standard C functions
= I tried this but it faills to load and gives following error.

Error loading /Users/rahul/Desktop/MacResearch/InternetBlock/TcpFilter/trunk/build/Debug/TcpFilter.kext/Contents/MacOS/TcpFilter:  dlopen(/Users/rahul/Desktop/MacResearch/InternetBlock/TcpFilter/trunk/build/Debug/TcpFilter.kext/Contents/MacOS/TcpFilter, 262): no suitable image found.  Did find:	/Users/rahul/Desktop/MacResearch/InternetBlock/TcpFilter/trunk/build/Debug/TcpFilter.kext/Contents/MacOS/TcpFilter: can't map
...
you can do whatever you want imagine you have your GUI app in
awakeFromNib just execute the load using popen on a pre-flight,
= I would love to do that. But problem is I am able to load TcpFilter.kext from /tmp only.

sh-3.2$ sudo kextload -v /Users/rahul/Desktop/MacResearch/InternetBlock/TcpFilter/trunk/build/Release/TcpFilter.kext
extension /Users/rahul/Desktop/MacResearch/InternetBlock/TcpFilter/trunk/build/Release/TcpFilter.kext has potential problems:
Warnings
{
    "Kext has immediate dependencies on both com.apple.kernel and com.apple.kpi components; use only one style" = true
}

kextload: extension /Users/rahul/Desktop/MacResearch/InternetBlock/TcpFilter/trunk/build/Release/TcpFilter.kext appears to be loadable
kextload: loading extension /Users/rahul/Desktop/MacResearch/InternetBlock/TcpFilter/trunk/build/Release/TcpFilter.kext
kextload: extension /Users/rahul/Desktop/MacResearch/InternetBlock/TcpFilter/trunk/build/Release/TcpFilter.kext is not authentic (check ownership and permissions; run with -t for details)
...
second option create a deamon script loader/unloader using launchd, I
don't understand what's your problem anyway
I also used launchd. It also ask for password. Can see it on console. So, this dont load TcpFilter.kext
This thing is really frustrating. Please help.
I also attached plist of TcpFilter.kext. May be that can give u clue to help me.

Thanks
Rahul

________________________________________
From: darwin-kernel-bounces+rahulkumar_tibdewal=persistent.co.in@lists.apple.com [darwin-kernel-bounces+rahulkumar_tibdewal=persistent.co.in@lists.apple.com] On Behalf Of mm w [0xcafefeed@gmail.com]
Sent: Thursday, May 28, 2009 12:34 AM
To: darwin-kernel@lists.apple.com
Subject: Re: copy some kernel extensions to /tmp directory and then load        that kext when program Launches

if you don't know how to get a root Priviledge: (maybe it's the real
question behind)

http://code.google.com/p/le-depotoir/source/browse/trunk/misc/auth.c

you could also use osascript or applescript (carbon embedded too)

do shell script "/bin/ls -la" with administrator privileges there are
many well-known solutions (thousand lines on various forums)  but it's
definitely not a question for the kernel-dev-list or a kext problem

Best

On Wed, May 27, 2009 at 11:58 AM, mm w <0xcafefeed@gmail.com> wrote:
...
system(3) execve(2) popen(3)  posix_spawn(2)
cp src -> dest, there are a lot of sub-api to copy data,
but in your case, you have only to spawn/exec/popen a pre-flight
script in your code and do whatever you want as everybody does
but I don't understand why you don't let the kexts into your app
bundle and then execute from CFBundle Resources directory your
pre-flight script using standard C functions
you can do whatever you want imagine you have your GUI app in
awakeFromNib just execute the load using popen on a pre-flight,
second option create a deamon script loader/unloader using launchd, I
don't understand what's your problem anyway
Cheers!
On Wed, May 27, 2009 at 10:35 AM, Rahulkumar Tibdewal
<rahulkumar_tibdewal@persistent.co.in> wrote:
...
Hi
As I said before, My heartiest apology for spam. Again that was not intentional.
I want to do this at standard user level. I am using C++/carbon code.
You have give a scripts which will run for super user.
However the case is I want to copy kext to /tmp and load from there itself on standard user machine.
This will help server monitor network on that  standard user machine.
Thanks
Rahul
-----Original Message-----
From: darwin-kernel-bounces+rahulkumar_tibdewal=persistent.co.in@lists.apple.com [mailto:darwin-kernel-bounces+rahulkumar_tibdewal=persistent.co.in@lists.apple.com] On Behalf Of mm w
Sent: Wednesday, May 27, 2009 9:57 PM
To: darwin-kernel@lists.apple.com
Subject: Re: copy some kernel extensions to /tmp directory and then load that kext when program Launches
Hello,
your request is a bit messy, do you load your program at boot? deamon
whatever or is it a Cocoa App that needs to work with its kexts ? you
can use kextstat to grep your reversed DNS
popen NSTask whatever you choose are your friends, but I am not sure
my answer fits with your multi spam request
sudo kextloader /tmp/kext.kext
#!/usr/bin/env bash
usage () {
       echo "Usage: kextdevel [load|unload] kext"
       exit 1
}
if [[ $UID -ne 0 ]]; then
       echo "System administrator privileges required"
   exit 1
fi
if [ $# != 2 ] ;
then
       usage
fi
if ! test -d "${2}" ;
then
       usage
fi
if test "${1}" = "load" ;
then
       chmod 0755 $(find "${2}" -type d)
       chmod 0644 $(find "${2}" -type f)
       chown -R root:wheel "${2}"
       kextload -t "${2}"
       exit 0
elif test "${1}" = "unload" ;
then
       kextunload "${2}"
       rm -Rf "${2}"
       exit 0
else
       usage
fi
# EOF
Best
On Wed, May 27, 2009 at 7:01 AM, Rahulkumar Tibdewal
<rahulkumar_tibdewal@persistent.co.in> wrote:
...
Hi,
I want to copy some kernel extensions to /tmp directory and then load that
kext.
This can be done through super user privileges from terminal.
However I want to do this when my application launches.
Does anyone have any idea how can I do this?
Thanks
Rahul
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