I'm trying to update my application using SWUpdate tool for my embedded board.
I already created my .swu pack, anche with ssh command line, it works fine.
I need to launch the update from my Qt application.
How can I do?
Maybe I can launch QProcess::execute("swupdate -i /run/media/AppUpdate.swu"), but it still not working.
How can I link with Qt the SWUpdate API installed?
Thanks.
You did not state which Qt version you are using. The more recent ones deprecated the QProcess::execute call as you are using it (program name and arguments in one string).
Try this:
QProcess* proc = new QProcess;
proc->setProgram("swupdate");
proc->setArguments(QStringList({"-i", "path/to/your/update.swu"});
proc->start();
if (!proc->waitForStarted())
qCritical() << "failed to start swupdate: " << proc->errorString();
/*optional: block/wait for swupdate to finish*/
proc->waitForFinished(-1);
I recommend to also implement and connect the readyRead signal and save/log swupdate's output in case something goes wrong during the update.
Related
Q1. What versions are we using?
Ans.
Python 3.6.12
OS : CentOS 7 64-bit
DB : Oracle 18c
Django 2.2
cx_Oracle : 8.1.0
Q2. Describe the problem
Ans. While running server with "python3 manage.py runserver"
application is able to contact Oracle DB and show the Django Administration page and login also works.
But when we access the application using the Apache (HTTPD) based URL over secure SSL port, we do see the Django page and the admin page as well but Login to Admin page with Internal server error.
In the logs, we see
"django.db.utils.DatabaseError: Error while trying to retrieve text for error ORA-01804"
cx_oracle is otherwise able to connect to the database properly, another application is also using the same database behind the same httpd proxy and works fine
Q3. Show the directory listing where your Oracle Client libraries are installed (e.g. the Instant Client directory). Is it 64-bit or 32-bit?
Ans. 64-bit
Q4. Show what the PATH environment variable (on Windows) or LD_LIBRARY_PATH (on Linux) is set to?
LD_LIBRARY_PATH=/srv/vol/db/oracle/product/18.0.0/dbhome_1/lib:/lib:/usr/lib
PATH=$ORACLE_HOME/bin:/srv/vol/db/oracle/product/18.0.0/dbhome_1/lib:$PATH
Q5. Show any Oracle environment variables set (e.g. ORACLE_HOME, ORACLE_BASE).
ORACLE_HOME=/srv/vol/db/oracle/product/18.0.0/dbhome_1
TNS_ADMIN=$ORACLE_HOME/network/admin
NLS_LANG=AMERICAN_AMERICA.AL32UTF8
ORACLE_BASE=/srv/vol/db/oracle
CLASSPATH=$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib:$ORACLE_HOME/lib
Any suggestions/help is highly appreciated.
Thank you
I found the problem
So I just removed all the variable declarations from /etc/sysconfig/httpd and checked, the application was still able to access the lib files, so these were now redundant.
Then undid all variable declarations done earlier in .localsh and .localrc files for the os users. To start from scratch, and go step by step to see where it breaks.
So now, cx_Oracle was looking for the lib files in wrong directory
$ORACLE_HOME/client_1/lib
instead of
$ORACLE_HOME/lib
DPI-1047: Cannot locate a 64-bit Oracle Client library: "$ORACLE_HOME/client_1/lib/libclntsh.so: cannot open shared object file: No such file or directory". See https://cx-oracle.readthedocs.io/en/latest/user_guide/installation.html for help
I did not have any subfolder named "client_1" inside dbhome_1
so I just created a symlink client_1 that points to dbhome_1 (still unsure on this, but at least it works :) )
So, now, this error was gone but now again ORA-01804 was coming. 😑
I had read somewhere that this error can be fixed by adding "libociei.so" but I did not have one on my instance, so I generated it using these commands:-
mkdir -p $ORACLE_HOME/rdbms/install/instantclient/light
cd $ORACLE_HOME/rdbms/lib
make -f ins_rdbms.mk igenliboci
Then I just moved this libociei.so file from
$ORACLE_HOME/instantclient to $ORACLE_HOME/lib
Now there was a new error (so.. progress 😉 ):
ORA-12546 - TNS Permission Denied.
This was easy to solve 😀
I used this command to address this :-
setsebool -P httpd_can_network_connect on
And...... That was all! It worked.
In order to use the hcsr-04 ultrasonic sensor using BBB's PRU, I have tried this git :
https://github.com/HudsonWerks/Range-Sensor-PRU
I get the error "the PRU failed to open", when I try to start "rangepru".
Doing some research, I feel like that is because my PRU is not initialized and that I should do : "echo BB-BONE-PRU-01 > /sys/devices/bone_capemgr.8/slots" to correct it.
But with the recent debian versions (4.x), the cape manager changed and I found the file "slots" at:
/sys/devices/platform/bone_capemgr/slots ; BUT, there is no way to open, modify it :
- using "nano" I get "slots.swp Permission denied"
- and by typing the correct echo command (modified from the one above) : I get : "write error: No such file or directory"
Best regards,
Elrise
You are probably missing a suitable device tree driver.
Try to follow the instructions on:
https://github.com/luigif/hcsr04
related to the compilation and installation of the driver.
If you have a proper development environment, executing make install should do everything for you.
I have a Livecode stack which I use for processing server reports. Currently, it reads files off of my Linux server (CentOS) from my desktop. I would like to set up a cron job on the server itself which would run everything for me. Here are my questions:
is it possible to run a stack from command line on a headless server (and how)?
is it possible to pass parameters in the command line to the stack?
how can I present some text in my terminal that will indicate that it worked?
For my purposes, it does not matter if the stack is compiled into a standalone, or left as a stack and run through an installation of Livecode on the machine.
My guess, is that in my openStack handler, I am going to toss in all of the handlers that would normally run when I press the button that initiates my report, and then end the openStack handler with some sort of shutdown code command.
If you install community server (or commercial server), the following script will run on the server and demonstrates how to access command line arguments;
#!/path/to/livecode/server/livecode-server
<?lc
put "arguments: " & $# & LF
put "first argument: " & $0 & LF
put "next argument: " & $1 & LF
You can also open stacks as library files (check out start using in the dictionary) and access their handlers, etc. from your scripts.
Is there any way that I can develop an app for Firefox OS that uses a certified API and install it on my own phone?
Our specific need is for telephony data such as signal strength. We can do this on Android without any difficulty (indeed, we could put the app on Google Play if we wanted to). But we just need to install it on a small number of in-house phones.
It seems that Firefox OS considers it to be in some way a security risk to find out the signal strength of the cell tower, and similar telephony data. Am I correct in assuming that there is no way that Firefox OS will let a developer app read this data?
If you are using Firefox OS 1.2 > you should be able to push a certified app to a unlocked phone for testing purposes. I put in code like:
testconn.onclick = function () {
var cnx = navigator.mozMobileConnection;
if (cnx.voice.connected) {
console.log("The signal has a strength of " + (+cnx.voice.relSignalStrength) + "%");
} else {
console.log("The state of the connection is: " + cnx.voice.state);
}
};
and entered the following permission in the manifest:
"permissions": {
"mobileconnection":{}
},
"type": "certified"
You should be able to install your certified app on a real Firefox OS phone after performing these steps from MDN:
On your computer, enter the following command in Terminal/console to enter your device's filesystem via the shell:
adb shell
Your prompt should change to root#android.
Next, stop B2G running using the following command:
stop b2g
Navigate to the following directory:
cd /data/b2g/mozilla/*.default/
Here, update the prefs.js file with the following line:
echo 'user_pref("devtools.debugger.forbid-certified-apps", false);' >> prefs.js
After you've finished editing and saving the file, start B2G again using the following command:
start b2g
Exit the android filesystem using the exit command; this will return you to your normal terminal prompt.
Following this question, how do I launch instruments with iPhone simulator as a device.
I tried this:
$ instruments -t /Developer/Platforms/iPhoneOS.platform/Developer/Library/Instruments/PlugIns/AutomationInstrument.bundle/Contents/Resources/Automation.tracetemplate -w iphonesimulator5.0 MyApp.app
But I get this error:
Instruments Usage Error : Device failed to become ready for use.
-w <deviceID> is used only when you wish to specify a hardware device as the destination (the 'deviceID' here is the Identifier of the device, found in the Organizer of Xcode).
Instead of using -w, you can specify a flag during the build to force instruments to use iPhone. Details can be found here.
I was doing it as follows:
1.I created a template in which I was calling my UI Automation Main file that Triggers running all the scripts.
EX:
//Main.js file will run auto.js scripts
//auto.js is my main file in which I am running all the scripts
//Main.js file
#import "auto.js"
auto.run();
//Now open terminal and run the following command.
1. Go to the directory where you saved your template
2.Copy the location where you simulator (full path) is
Than run the command below:
instruments -t ./NameOfYourTemplate.tracetemplate /Users/swathyvalluri/Debug-iphonesimulator/MyApp.app
Note : Create a new file in the template and copy the contents into it what ever you want to put, otherwise it will look for Main.js file in your locally and will fail when running it on another server.
Please let me know if you need more help :)
Device id means here UDID of the device.
Also see the link below, it is very useful :
http://lemonjar.com/blog/?p=69