mmitch / slock-exec

slock (X screen locker) variant with script execution

slock-exec

what is this?

This is a small hack of slock that runs scripts on the lock/unlock events:

1. slock-script-lock is run on locking the screen.
   This is rather pointless and could also be achieved simply by putting the slock invocation in a little script, but it was a nice simple task to practice some C stuff.

2. slock-script-unlock is run after unlocking the screen and the password you entered to unlock the screen is passed to the script on STDIN.

why is this?

The reason for this is that I want to drop my cached identities from ssh-agent on screen-lock and automatically re-add them after unlocking the screen as described here:

• https://utcc.utoronto.ca/~cks/space/blog/linux/EncryptedSSHKeyMigration

• or this more general article: https://utcc.utoronto.ca/~cks/space/blog/sysadmin/SSHKeyGoodPractices

how to build

Have a look at the README file.

copyright

See the LICENSE file for the original copyright notice of slock. (While it says MIT/X Consortium License in the first line, the wording is that of the plain MIT license; the additional paragraphs used by the X Consortium are missing. Perhaps an upstream bug?)

homepage

slock-exec is available at https://github.com/mmitch/slock-exec

TODOs

• add notice to manpage/version number that this is not the real slock
  • or better yet: change executable name
• install empty/default slock-lock-* scripts to /usr/local/bin to provide a fallback? to be overriden with own scripts in ~/bin