First of all, make sure that you know where the libfaults library is installed.
If you don't have libfaults on your system see README on how to
compile and install libfaults.
Lets create a simple configuration file called libfaults.conf with the content
[libfaults]
log_type = console
log_level = info
[accept]
enable = true
return_value = -1
error_code = EMFILE
and save it in your home directory ($HOME/libfaults.conf).
In our main section called [libfaults] we setup the logging of libfaults to
be performed at info level and sent to the console.
Next we create a section called [accept] which controls the outcome of system calls
to the accept function. In this case it will fail, since it has a return value of of
-1 and it will have the errno variable set to EMFILE which means that the process
has run out of file descriptors for the process.
We are now ready to use libfaults.
See Configuration for all configuration options.
We will use libfaults using the command
LD_PRELOAD=/usr/local/lib/libfaults.so <your_application>
When ever <your_application> calls accept it will generate the error we specified
above.
This will make it easier to verify that your error paths are correct.
The libfaults community hopes that you find the project interesting.
Feel free to
All contributions are most welcome !