URL:
<http://savannah.gnu.org/bugs/?35585>
Summary: Losing session info
Project: GNU Screen
Submitted by: None
Submitted on: Втр 21 Фев 2012 14:34:52
Category: Program Logic
Severity: 3 - Normal
Priority: 5 - Normal
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Release: 4.0.3
Fixed Release: None
Planned Release: None
Work Required: None
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Details:
Hi,
I`ve recently discovered a strange bug, which may possibly lead probably to
bigger problem than shown above but I am too lazy to investigate it. How to
reproduce:
- on Debian Squeeze, install screen and sudo
- allow regular user to do screen -r of root screens and start some commands
inside screen(but not interpreter, sure), e.g, ' /usr/bin/screen -d -m
/root/1.sh, /usr/bin/screen -d -m /root/2.sh, /usr/bin/screen -r ????' in most
stupid case. Surely second thing is VERY dangerous but we assuming that root
user never runs screen session by himself.
- start attached screen as regular user, then start two detached screens as
root using sudo as above,
- resume one of root screens in same session, then press key
sequence(Ctrl-a,d) to detach screen,
- voila, screen -r as root gives us only one screen, not selection of two, but
really two screen instances running under root.
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