Development/Tutorials/Debugging/Debugging IOSlaves/Debugging kio sftp: Difference between revisions

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(Mention apparently-incorrect ssh/sftp logging instructions)
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This page is a starting point for debugging kio_sftp. Please also read [[Development/Tutorials/Debugging/Debugging_IOSlaves|how to debug IO slaves generically]].
Moved to the [https://community.kde.org/Guidelines_and_HOWTOs/Debugging/Debugging_IOSlaves/Debugging_kio_sftp Community wiki].
 
= Overview =
 
When you point file manager to sftp://''user''@''target'', [http://websvn.kde.org/trunk/KDE/kdebase/runtime/kioslave/sftp/kio_sftp.cpp?view=log the sftp kioslave] uses [http://www.libssh.org libssh] to open a connection to the sftp server.
 
= Reporting Bugs =
 
If this is your first bug report please read the following document:
 
[http://www.chiark.greenend.org.uk/~sgtatham/bugs.html How to Report Bugs Effectively]
 
Then got to http://bugs.kde.org/ and create a bug report. Tell us:
 
* The KDE you're running
* The libssh version installed
* The sftp server version (e.g. the openssh version on the server)
* If you use ~/.ssh/config show us your special host config
* Provide log files if possible (see below)
 
= Logging =
 
You may want to switch on logging for kio_sftp.
 
In this example, we want to log the output to /tmp/kio_sftp.log. Open a konsole or run the command 'kdebugdialog --fullmode'.
 
In the "Debug Area" select "7120 kio_sftp". In the Information box select 'Information' as the "Output" and use '/tmp/kio_sftp.log' a the "File".
 
To enable logging you have to reload the slave system. You can do this by calling:
 
'kdeinit4'
 
= Logging with libssh debut output =
 
To enable libssh debug messages in addition you have to set an environment variable before calling kdeinit.
 
KIO_SFTP_LOG_VERBOSITY=1 kdeinit4
 
= Enable logging in openssh =
 
(Both of the instructions below refer to sshd, the server--these should not affect client operations, e.g. running ssh or sftp.  I don't think these instructions are correct.)
 
== SSH Logging ==
 
Edit /etc/ssh/sshd_config
 
Look for LogLevel and set it to:
 
  LogLevel DEBUG
 
== SFTP Logging ==
 
Edit /etc/ssh/sshd_config
 
Look for the sftp subsystem and change it to:
 
  Subsystem sftp /usr/lib64/ssh/sftp-server -l DEBUG

Latest revision as of 11:48, 28 April 2019

Moved to the Community wiki.