I was looking at the source code below.
https://github.com/millken/c-example/blob/master/epoll-example.c
From this source code, the line 140~149 is about error handling when the socket (or file descriptor) has an error.
I wanted to see EPOLLERR occurred and tried to make interface down using "ifconfig [interface name] down" command.
But I don't see EPOLLERR detected from epoll_wait() at line #137.
Is there any way I can generate EPOLLERR condition?
Is it possible to make EPOLLERR condition using interface up/down command?
Related
I want to add blocks to MATLAB simulink model by command line. I used add_block command to add a Constant block to my model by following command and it worked
add_block('simulink/Sources/Constant','MyModel/ConstValue')
But when I try to add'Chart' to my model by the following command,
add_block('stateflow/Chart','MyModel/Chart')
It causes an error:
Error due to multiple causes.
Caused by:
Unable to load block diagram 'stateflow'
There is no block named 'stateflow/Chart'
How should I sove this prblem ?
Solution ref: https://uk.mathworks.com/matlabcentral/answers/53920-how-to-add-a-stateflow-chart-in-an-existing-simulink-model-using-api
The source you need is sflib/Chart not stateflow/Chart
So the command is something like:
add_block('sflib/Chart','MyModel/Chart')
I want to use my custom error messages in my citrus test results.
Example:
Original Error Message: java.io.FileNotFoundException: D:\expectedOutput\Smaple.xml (The system cannot find the file specified).
Custom Message: Hey The File was not found in your directory Please check. (Need to print like this in my test results failure message).
Please check the image hereenter image description here
You can not change this message in particular as this is coming from the thrown Java exception. You could implement your own TestReporter and/or TestListener though to translate the error into something matching your needs.
Something like: https://citrusframework.org/samples/reporting/
I created a custom library. This library contains only one subsytem block named RADAR. I am trying to use add_block and add this subsytem. Without any error the simulink file opens but the block does not appear.
This is how I load my library.
load_system('libdeneme');
And these are some of the code lines I tried.
add_block('simulink/libdeneme/RADAR','autoCreateDeneme')
add_block('simulink/libdeneme/RADAR','autoCreateDeneme')
add_block('libdeneme/RADAR','autoCreateDeneme')
add_block('libdeneme/RADAR',)
The source needs to be the library name then the name of the block in the library. Your first 2 lines don't work because your library is not the simulink library. But the source name in your last 2 attempts look right.
The destination needs to be the name of the model followed by the name to give the new block. Neither of your examples follow that format. (Surely the last example you give throws an error as it is invalid MATLAB syntax?)
You want something like
add_block('libdeneme/RADAR','nameOfModelToCopyTo/nameToGiveBlockInModel');
I want to add a new command in nl80211 interface. i browsed but didnt get information in much details. As far as i know, for adding command we need to add command in enum nl80211_commands present in /usr/include/linux/nl80211.h file line 515, and we need to register a callback function for that command that is done by adding callback function in
const struct wpa_driver_ops wpa_driver_nl80211_ops present in *src/drivers/driver_nl80211.c* after doing all this how to send commands to kernel side i am not getting that part, if anybody knows please help.
I believe you can modify wpa_supplicant to do it.
When creating my own macro, and trying to add it so that anyone can use it, I get the following error:
Error number 4001 in 4: Error while parsing velocity page /templates/docdoesnotexist.vm
Wrapped Exception: Cannot start the Velocity engine
I do not change that file, but I do change xwiki/templates/macros.txt and /macros.vm by adding recentChanges=velocity:recentChanges: and #macro(recentChanges) respectively (yes, I do add working content after #macro(recentChanges))
That looks like a syntax error in macros.vm. You should revert to the original macros.vm and first try to write your custom macro in a wiki page. Once it works, you can move it to macros.vm and restart the server.
macros.txt shouldn't be edited, it's a legacy file used by the older WYSIWYG editor.