Skip to content

SessionTimeLimit.md

Latest commit

 

History

History
28 lines (22 loc) · 1.11 KB

SessionTimeLimit.md

File metadata and controls

28 lines (22 loc) · 1.11 KB
Raw

How does Session Time Limit work?

The parent defines, per weekday, a permitted time range (start–end) and an optional daily usage limit in minutes.

PPCDaemon.py (root, system service)

  • Tracks logind sessions (Class == "user" only; greeter/manager sessions are ignored) on the system bus.
  • Writes the usage minutes of restricted users to /var/log/user-sessions/{username}.log once per minute.
  • Checks whether the session time is over:
    • immediately when a restricted user logs in,
    • immediately when the preferences change,
    • and once per minute.
  • When the time is over:
    1. Emits the SessionTimeExpired(uid, username, seconds_left) signal on the system bus (tr.org.pardus.ParentalControl).
    2. 11 seconds later terminates the user via logind TerminateUser.

PPCAgent.py (user, user service)

Listens for the SessionTimeExpired signal and shows the 10 second countdown popup (NotificationApp.py).

The agent is unprivileged on purpose: it dies instantly on logout (it can not block it), and killing it only hides the popup — the root daemon still terminates the session.