Can't edit system via Telnet (E2)

[rahjman]

Hi.

I have partitioned my sd as;

/dev/mmca1      700m   fat16
/dev/mmca5        32m   swap
/dev/mmca6        270m  ext2

I have formatted all with success. mmca1 mounts to /mmc/mmca1.  How can I mount ext2 partition. I try to create dir /mmc/mmca6 but it says "Operation not permitted".

I want to mount it some where,  better under /mmc/. Also will it auto mount it every reboot or should I write /etc/fstab ?

[keaglez]

If you use MAXX IV, it will mount to /mmc/mmcb1 if I'm not wrong... In other firmware, it will mount to /ezxlocal/download/mystuff folder...

[rahjman]

I use BlackStorm. Dont I have root access via telnet, so why cant I modify system files? I try to create some symlinks in /usr/lib but it just says operation not permitted. I have cross compiled qt embedded 4.4.3 trying to use its libs on SD card.

[keaglez]

Root access is useless, since the system is placed in a compressed file system, that only allow read-only... To modify the system, you need to modify and recreate the code group (the compressed file system) on the computer, then flash it to the phone...

To test some cross compiled libs, you can use another trick like placing the libs on SD and add/set the environment to LD_LIBRARY_PATH, for example

Code:

export LD_LIBRARY_PATH=/mmc/mmca1/lib:$LD_LIBRARY_PATH

or using mount --bind

Code:

mount --bind /mmc/mmca1/lib/somelib.so /usr/lib/somelib.so

It will make the same effect as replacing the libs, but temporary...

Hope it helps and CMIIW...

[rahjman]

Thanks dude. I understand but one more question about e2 sysstem ; where the java or mpkg apps written when we install them on phones memory instead of SD card?( I just wonder )

BTW, yes I set enviroment vars but I get a strage error when I try to use a very simple QtGui app that just has a pushbutton;

"Failed to mmap /mmc/mmca1/qt4/lib/fonts/helvetica_100_50.qpf"

QtCore runs normal ( console apps I mean ) but I can't run any QtGui app. Something wrong about fonts. So I wanted to try if its about using libs on SD or not.

Thanks anyways.

[keaglez]

Thanks dude. I understand but one more question about e2 sysstem ; where the java or mpkg apps written when we install them on phones memory instead of SD card?( I just wonder )

BTW, yes I set enviroment vars but I get a strage error when I try to use a very simple QtGui app that just has a pushbutton;

"Failed to mmap /mmc/mmca1/qt4/lib/fonts/helvetica_100_50.qpf"

QtCore runs normal ( console apps I mean ) but I can't run any QtGui app. Something wrong about fonts. So I wanted to try if its about using libs on SD or not.

Thanks anyways.

The mpkg/java is stored in ezxlocal...

For the font, I'm not sure, I never tried it...

[rahjman]

Hmm, Ok.

I want to ask something else I get Segmentation Fault if try try to run app that I compiled ezx sdk. I set env vars like this:

# export QTDIR=/usr/lib/ezx
# export LD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATH
then

#./hello-world.lin
Segmentation Fault

It runs on the phone. Did I  something wrong with exports?

I know I am asking too much, but I'am curious. Thanks.

[keaglez]

AFAIK, the segmentation fault can be caused by bad header or code... What SDK did you use anyway?

[rahjman]

I dont think its about SDK, I use blackhawk SDK and ezx-crosstool-0.6,  btw. My toolchain works perfect because as I said I run my app directly on phone via file-manager and just run the hello.lin file. The problem is I cant run the same file via telnet, It just seg faults.

[keaglez]

Hmm... Try this

Code:

. /etc/init.d/ezxenvr.sh
./hello-world.lin

[rahjman]

Nope,
 it doesn't work.

Code:

root@ROKR E2:/mmc/mmca1/qt4# /etc/init.d/ezxenvr.sh
root@ROKR E2:/mmc/mmca1/qt4# ./hello-world.lin
./hello-world.lin: error while loading shared libraries: libezxappbase.so.1: cannot open shared object file: No such file or directory
root@ROKR E2:/mmc/mmca1/qt4#

[keaglez]

Nope,
 it doesn't work.

Code:

root@ROKR E2:/mmc/mmca1/qt4# /etc/init.d/ezxenvr.sh
root@ROKR E2:/mmc/mmca1/qt4# ./hello-world.lin
./hello-world.lin: error while loading shared libraries: libezxappbase.so.1: cannot open shared object file: No such file or directory
root@ROKR E2:/mmc/mmca1/qt4#

Look the line carefully, notice the space after dot in the first line... (it is actually dot space /etc/init.d/ezxenvr.sh)

Code:

. /etc/init.d/ezxenvr.sh

or if it confuse you, use

Code:

source /etc/init.d/ezxenvr.sh

[rahjman]

Thanks dude, it worked.

Now, I can develop native ezx apps and test it via telnet. There remains one big problem for me, using Qt Embedded itself. the  arm-linux-g++ in cross-tool-0.6 has big problems compiling Qt 4.4.3 and freetype2. Without freetype2 it compiles but qt apps throws an error about its native font format "qpf". Is it possible to use a new g++ like 4.x series? Can I use different gcc's, for example gcc from crosstool-0.6 to ezx development and gcc 4.x to qt development? Should it work?

[keaglez]

Ah, now I don't know... lol

[rahjman]

Ah, now I don't know... lol

Thanks anyways