Thanks to python-gnomekeyring , this is relatively easy:
python -c "import gnomekeyring;gnomekeyring.unlock_sync(None, 'my password');"
Or as a proper script:
gnomekeyring.unlock_sync(None, 'my password');
I think you don't need to install the package. But it can't hurt to try.
Keep in mind that storing your password on your hard disk is an immense security risk. You should be using this instead:
gnomekeyring.unlock_sync(None, getpass.getpass('Password: '));
You can save this script, for example, as
unlock-keyring.py and then do the following:
sudo mv unlock-keyring.py /usr/bin/unlock-keyring
sudo chmod a+x /usr/bin/unlock-keyring
From then, you can always just type
unlock-keyring and be prompted for a password. Don't do this with the version that contains your password.
You can replace
None with the name of your keyring, e.g.
'session', if you want to unlock one that isn't the default.
I'm having a hard time testing this properly, so please let me know if it doesn't work and I'll take a look at it right away. Also let me know if it does work :-)