slock/README
Christopher Jeffrey 5a7ab3ff79 disable_kill
2014-09-19 02:18:53 -07:00

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slock - simple screen locker
============================
simple screen locker utility for X.
Changes by chjj
------------
- Custom Password: You can provide a custom password so you don't have to enter
your user password on the X server. Simply create a ~/.slock_passwd file with
your separate password in it.
- Alarms: A siren will play if a user enters an incorrect password. It must
reside in ~/slock.
- Automatic Shutdown: Your machine will immediately shutdown if:
1. The wrong password is entered more than 5 times.
2. ALT/CTRL/F1-F13 is pressed to switch VTs or to try to kill the X server.
Also, if ALT+SYSRQ is attempted to be used.
- Automatic shutdown requires a sudoers option to be set in /etc/sudoers:
- systemd: `[username] [hostname] =NOPASSWD: /usr/bin/systemctl poweroff`
- sysvinit: `[username] [hostname] =NOPASSWD: /usr/bin/shutdown -h now`
You must change [username] and [hostname] to your username and the hostname
of the machine.
- Twilio Support: You will receive an SMS to your phone when someone inputs a
wrong password or pressed ALT/CTRL/F1-13/SYSRQ. See twilio_example.h to create a
twilio.h file. You will need a twilio account to set this up.
- Disabling alt+sysrq and ctrl+alt+backspace before shutting down: This
prevents an attacker from killing the screenlock quickly before the shutdown.
- This requires a sudoers option to be set in /etc/sudoers:
- [username] [hostname] =NOPASSWD: /usr/bin/tee /proc/sys/kernel/sysrq
You must change [username] and [hostname] to your username and the hostname
of the machine.
Requirements
------------
In order to build slock you need the Xlib header files.
Installation
------------
Edit config.mk to match your local setup (slock is installed into
the /usr/local namespace by default).
Afterwards enter the following command to build and install slock
(if necessary as root):
make clean install
Running slock
-------------
Simply invoke the 'slock' command. To get out of it, enter your password.