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Groups > gnu.bash.bug > #11509

Re: SIGINT handling

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2015-09-19 16:42:28 -0400, Chet Ramey:
[...]
> I'm surprised you've managed to avoid the dozen or so discussions on the
> topic.
> 
> http://lists.gnu.org/archive/html/bug-bash/2014-03/msg00108.html
[...]

Thanks for the links. I still think the comments on the second
article I sent
(http://thread.gmane.org/gmane.comp.shells.bash.bugs/24178/focus=24183)
still hold though and from a quick read I don't see those points
being mentioned in the past discussions (but that was a quick
read).

I notice that you mention the race conditions have been fixed,
but I'm still seeing some non-deterministic behaviour.

In case it was caused by some Debian patch, I recompiled the
code of 4.3.42 from gnu.org and the one from the devel branch on
the git repository (commit bash-20150911 snapshot) and still:

$ ./bash -c 'sh -c "trap exit INT; sleep 10; :"; echo hi'
^Chi
$ ./bash -c 'sh -c "trap exit INT; sleep 10; :"; echo hi'
^Chi
$ ./bash -c 'sh -c "trap exit INT; sleep 10; :"; echo hi'
^C
$ ./bash -c 'sh -c "trap exit INT; sleep 10; :"; echo hi'
^Chi

Sometimes (and the frequency of occurrences is erratic,
generally roughly 80% of "hi"s but at times, I don't see a "hi"
in a while), the "hi" doesn't show up. Note that I press ^C well
after sleep has started.

On Linux 4.1.0-1-amd64 core2 duo, bashcompiled with gcc (Debian
5.2.1-16) 5.2.1 20150903 linked with
GNU C Library (Debian GLIBC 2.19-19) stable release version 2.19, by Roland McGrath et al.
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 4.8.5.
Compiled on a Linux 4.0.7 system on 2015-07-09.
Available extensions:
        crypt add-on version 2.1 by Michael Glad and others
        GNU Libidn by Simon Josefsson
        Native POSIX Threads Library by Ulrich Drepper et al
        BIND-8.2.3-T5B
libc ABIs: UNIQUE IFUNC

-- 
Stephane

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Re: SIGINT handling Stephane Chazelas <stephane.chazelas@gmail.com> - 2015-09-19 22:31 +0100

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