Date: Mon, 1 Jul 2013 03:07:52 GMT From: Grant Watson <grant_watson@yahoo.com> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/180146: /bin/sh: Early SIGWINCH can end process Message-ID: <201307010307.r6137quZ054938@oldred.freebsd.org> Resent-Message-ID: <201307010310.r613A0VG071927@freefall.freebsd.org>
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>Number: 180146
>Category: bin
>Synopsis: /bin/sh: Early SIGWINCH can end process
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Jul 01 03:10:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: Grant Watson
>Release: 9.1-RELEASE
>Organization:
>Environment:
FreeBSD awesome-bsd 9.1-RELEASE FreeBSD 9.1-RELEASE #0 r243825: Tue Dec 4 09:23:10 UTC 2012 root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
>Description:
There appears to be a race condition in /bin/sh where receiving
SIGWINCH too early will cause the process to end. Bugs ports/178194
and ports/178651, which I filed, are occurrences of this bug.
>How-To-Repeat:
Way to Reproduce #1:
Install termit and paste the following into ~/.config/termit/rc.lua:
defaults = {
showScrollbar = false,
hideMenubar = true
}
setOptions(defaults)
Then run "termit -e /bin/sh". Running "termit -e 'truss -o shlog.txt /bin/sh'" does not surpress the bug for me.
Way to Reproduce #2:
Install the awesome window manager, create a user whose shell is /bin/sh, and ensure that this user does not have a ~/.config/awesome/rc.lua file that would override the default configuration.
Log in as this user. Left click the box in the upper-right corner of the screen to switch to a tiling layout. Press super+return (that is, windows+return) four or five times; each time an xterm should open. Many will close, but one or two may remain open. Running "truss xterm -e /bin/sh" does not surpress the bug for me, but running truss between xterm and sh does.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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