URL:
<http://savannah.gnu.org/bugs/?47493>
Summary: [PATCH] Make delay after child program terminates
configurable
Project: GNU Screen
Submitted by: mark7b
Submitted on: Tue 22 Mar 2016 07:06:07 AM GMT
Category: Program Logic
Severity: 3 - Normal
Priority: 5 - Normal
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Release: None
Fixed Release: None
Planned Release: None
Work Required: None
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Details:
The patch for Bug #27061 introduced a ten second delay after a child program
running in a window terminated -- this was to address a race between SIGCHLD
and any output written by that program being delivered.
That behavior makes sense if the process group is expected to be empty after
the child terminates. However, some users, like myself, do things like run a
bash process in a screen window and have that bash process run processes nohup
in the background. With the ten second delay, this causes each screen window
to linger for ten seconds when one tries closing it -- annoying, to say the
least.
I don't think that there is a fantastic way to resolve this; Linux's
documentation states that a delay may legitimately exist:
PTY(7):
Data flow between master and slave is handled asynchronously, much like data
flow with a physical terminal. Data written to the slave will be available at
the master promptly, but may not be available immediately. Similarly, there
may be a small processing delay between a write to the master, and the effect
being visible at the slave.
END MAN PAGE EXCERPT
I'm perfectly fine with some output potentially not showing up at the end (the
window is dying anyway); however, a ten second delay is a problem for me.
A patch is attached to make the delay configurable.
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File Attachments:
-------------------------------------------------------
Date: Tue 22 Mar 2016 07:06:07 AM GMT Name: childdelay.diff Size: 3kB By:
mark7b
<http://savannah.gnu.org/bugs/download.php?file_id=36719>
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