Debugging File Transfer
SSH Tectia Server for IBM z/OS uses a separate proces,
sft-server-g3 for file transfer operations.
To obtain debug information from
sft-server-g3, you can use the environment variables
When the debugging is enabled, the
sft-server-g3 debug messages are by default sent to the standard error, that goes also to the SFTP client. If you want to forward the
sft-server-g3 debug messages into a file and not to the client, you can add the following two environment variables affecting the secure file transfer user into the
/etc/environment file or the user-specific
$HOME/.ssh2/environment file on the server:
SSH_SFTP_DEBUG defines the debug level that controls the messages that the
sft-server-g3 process will be showing while executing. To get some debug data, you can use, for example:
To get more details, you can use, for example:
To get even deeper level of detail, you can use, for example:
To get full debugging information from the SFTP server, use:
To get most low-level z/OS debugging information:
To get all low-level z/OS debugging information:
To get all debugging information related to dataset allocation:
To get all debugging information related to z/OS catalog:
SSH_SFTP_DEBUG_FILE defines the file where the debug messages from the
sft-server-g3 will be printed. The value can be for example:
Note that the path must be given without citations marks. If this variable is not defined, the messages will be sent to standard error and the SFTP client will receive them.
SSH_DEBUG_FMT defines the format of the debug messages. The default variable used is:
SSH_DEBUG_FMT="%Dd/%Dt/%Dy %Dh:%Dm:%Ds:%Df %m/%s:%n:%f %M"
For more information on the syntax of this variable, see the
sftpg3.1 man page.
On the client side, it is also possible to use the
debug command of
sftpg3 to get debugging information. For example, to get basic debugging data, give the command:
sftp> debug "Sftp*=2"
The same debug strings as with
SSH_SFTP_DEBUG can also be used.
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