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authorKevin Krakauer <krakauer@google.com>2019-09-19 11:35:27 -0700
committergVisor bot <gvisor-bot@google.com>2019-09-19 11:36:47 -0700
commit0a8a75f3dabaf5c097710c3bb961b67b8ed653b5 (patch)
tree4f28d2550c996b8c10d06ebc511ff0433f47b5f7 /pkg/sentry/fs/anon/BUILD
parent28f431335b182519f420e026edac8b7bcfd2a40a (diff)
Job control: controlling TTYs and foreground process groups.
Adresses a deadlock with the rolled back change: https://github.com/google/gvisor/commit/b6a5b950d28e0b474fdad160b88bc15314cf9259 Creating a session from an orphaned process group was causing a lock to be acquired twice by a single goroutine. This behavior is addressed, and a test (OrphanRegression) has been added to pty.cc. Implemented the following ioctls: - TIOCSCTTY - set controlling TTY - TIOCNOTTY - remove controlling tty, maybe signal some other processes - TIOCGPGRP - get foreground process group. Also enables tcgetpgrp(). - TIOCSPGRP - set foreground process group. Also enabled tcsetpgrp(). Next steps are to actually turn terminal-generated control characters (e.g. C^c) into signals to the proper process groups, and to send SIGTTOU and SIGTTIN when appropriate. PiperOrigin-RevId: 270088599
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