This short series adds support for checkpoint and restart of PTYs. It is mildly tested on top of ckpt-v17-dev (with test/pty from user-cr). I'm not an expert on PTYs, TTYs, line disciplines and the like, comments are mostly welcome: * Only handles PTYs related to open files (no signal->...) * What (additional) values we need to sanitize on restart ? * What additional locking should be in place ? (especially checkpoint) * Need to save/restore echo buffer (and position) ? * /dev/ptmx and /dev/pts/... paths are currently hardcoded * For restart without restoring PIDs, need to ensure the session and pgrp are either -1 (none) or limited to a PID value that belongs to the restarted subtree. * For restart with restoring PIDs, need to create on-the-fly session and/or pgrp PIDs that do not exist (e.g. of a dead process). This is also necessary to correctly restore pgrp, regardless of PTYs. * Other security concerns ? ... * and probably more :p Oren. _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
