bugGNU Screen - Bugs: bug #54164, race between starting backend and...


bug #54164: race between starting backend and issuing command to session

Submitter:  Amadeusz Sławiński <amade>
Submitted:  Thu 21 Jun 2018 08:03:46 PM UTC
Category:  None Severity:  3 - Normal
Priority:  * 5 - Normal Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open Release:  None
Fixed Release:  None Planned Release:  None
Work Required:  None
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Thu 21 Jun 2018 09:17:12 PM UTC, comment #1: 

in my experience, seems it is easier to trigger when the system is under heavy cpu load. and as a bad workaround, i just put a "sleep 1" in between the 2 calls.

Thu 21 Jun 2018 08:03:46 PM UTC, original submission:  

there can be race when starting it in background and immediately issuing a command to session.

$ screen -S foo -dm
screen -S foo -X stuff "/path/to/script.sh^M"

No screen session found.

easier to reproduce if screen was not run previously or was flushed out of memory (/proc/sys/vm/drop_caches)

Amadeusz Sławiński <amade>
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