Most of the main utilities are able to write their log files to a Unix Domain socket if configured that way. watchgnupg is a simple listener for such a socket. It ameliorates the output with a time stamp and makes sure that long lines are not interspersed with log output from other utilities. This tool is not available for Windows.
watchgnupg is commonly invoked as
watchgnupg --force ~/.gnupg/S.log
This starts it on the current terminal for listening on the socket ~/.gnupg/S.log.
watchgnupg understands these options:
$ watchgnupg --force /home/foo/.gnupg/S.log
This waits for connections on the local socket /home/foo/.gnupg/S.log and shows all log entries. To make this work the option log-file needs to be used with all modules which logs are to be shown. The value for that option must be given with a special prefix (e.g. in the conf file):
For debugging purposes it is also possible to do remote logging. Take care if you use this feature because the information is send in the clear over the network. Use this syntax in the conf files:
You may use any port and not just 4711 as shown above; only IP addresses
are supported (v4 and v6) and no host names. You need to start
watchgnupg with the tcp option. Note that under
Windows the registry entry HKCU\Software\GNU\GnuPG:DefaultLogFile
can be used to change the default log output from
whatever is given by that entry. However the only useful entry is a TCP
name for remote debugging.