URL:
<http://savannah.gnu.org/bugs/?54378>
Summary: Querying for window title hangs
Project: GNU Screen
Submitted by: jcztery
Submitted on: Thu 26 Jul 2018 09:44:26 AM UTC
Category: Crash/Freeze/Infloop
Severity: 3 - Normal
Priority: 5 - Normal
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Release: 4.6.2
Fixed Release: None
Planned Release: None
Work Required: None
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Details:
Attached is a simple reproducer: zupa.
To reproduce:
1. Open three shells.
2. In shell 1 type: while true; do ./zupa status; done
3. In shell 2 type: while true; do ./zupa start; done
4. In shell 3 type: while true; do ./zupa stop; done
Alternatively, add another shell with while true; do ./zupa status; done
After some time (~ 1 minute) one or all sessions will hang:
root 23232 0.0 0.0 139164 1240 pts/8 S+ 17:21 0:00 screen -S
zupa -p main -Q title
root 31799 0.0 0.0 168308 24080 ? Ss 17:20 0:00 SCREEN -S
zupa -d -m bash
I think it has something to do with
/var/run/screen-4.6.2/S-root/31799.zupa-queryA
unix 2 [ ACC ] STREAM LISTENING 433339114 31799/SCREEN
/var/run/screen-4.6.2/S-root/31799.zupa
unix 2 [ ACC ] STREAM LISTENING 433384640 23232/screen
/var/run/screen-4.6.2/S-root/31799.zupa-queryA
strace -p 31799
Process 31799 attached
select(1024, [4 5 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23], [], NULL,
NULL
/proc/31799/fd:
lrwx------ 1 root root 64 Jul 26 17:23 4 -> socket:[433339114]
lrwx------ 1 root root 64 Jul 26 17:23 7 -> socket:[433339117]
strace -p 23232
Process 23232 attached
accept(4,
/proc/23232/fd:
lrwx------ 1 root root 64 Jul 26 17:23 4 -> socket:[433384640]
Reproduced on Centos7.
Regards.
Jacek Tomaka
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File Attachments:
-------------------------------------------------------
Date: Thu 26 Jul 2018 09:44:26 AM UTC Name: zupa Size: 1KiB By: jcztery
<http://savannah.gnu.org/bugs/download.php?file_id=44625>
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