What is the tshark equivalent of the wireshark -P command line option ?

How can I set the path setting for the preferences file on tshark as can be done with the -P wireshark flag ?

You cannot, as that functionality is not implemented in tshark. If you want to have that functionality, please file an enhancement request.

http://wiki.wireshark.org/ReportingBugs

In the meantime, you can only copy the personal profile directories from your personal path to the global profile directory of the user (%APPDATA%\Wireshark\profiles) and then select that profile with tshark option -C. However, that will only affect the profiles, not the preferences :-(

Or you create several batch files (as I did) for this purpose and you switch everything you need with those batch files, by copying everything to the user Wireshark directory, or by creating a junction (see mklink on Windows) for the global preferences directory (%APPDATA%\Wireshark).

rmdir %APPDATA%\Wireshark
mklink c:\wireshark\template_1 %APPDATA%\Wireshark

while c:\wireshark\template_1 contains your preferences, profiles, etc.

Regards
Kurt