[Bug 1553353] Re: tail'ing a file in a script session hangs
** Changed in: util-linux (Debian) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
** Changed in: util-linux (Debian) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
This bug was fixed in the package util-linux - 2.27.1-6ubuntu3 --- util-linux (2.27.1-6ubuntu3) xenial; urgency=medium * Add debian/patches/script-use-empty-slave.patch taken from upstream git (LP: #1553353, Closes: #820843) -- Simon Deziel Wed, 13 Apr 2016 15:01:21 + ** Changed in: util-linux (Ubuntu Xenial) Status: Fix Committed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
... and sponsored, thanks Simon! ** Changed in: util-linux (Ubuntu Xenial) Status: Confirmed => Fix Committed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
The attachment "lp1553353.debdiff" seems to be a debdiff. The ubuntu- sponsors team has been subscribed to the bug report so that they can review and hopefully sponsor the debdiff. If the attachment isn't a patch, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are member of the ~ubuntu-sponsors, unsubscribe the team. [This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issue please contact him.] ** Tags added: patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
The Debian maintainer forwarded the bug upstream and they fixed it right away. So here's a debdiff that fixes the problem for me. I uploaded it to my PPA and it successfully built on amd64 [1] but not i386 [2]. On i386 the libmount/lock test failed so it seems unrelated to this new commit. It's the only test that failed out of the 170 that were executed. 1: https://launchpad.net/~sdeziel/+archive/ubuntu/ppa/+build/9571252 2: https://launchpad.net/~sdeziel/+archive/ubuntu/ppa/+build/9571253 ** Patch added: "lp1553353.debdiff" https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+attachment/4635719/+files/lp1553353.debdiff -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
** Changed in: util-linux (Debian) Status: Unknown => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
** Bug watch added: Debian Bug tracker #820843 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=820843 ** Also affects: util-linux (Debian) via http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=820843 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
** Description changed: Steps to reproduce: 1) Start script session (same issue when script is saving to /dev/null) script # or: script /dev/null 2) Tail a file - tail -f /var/log/syslog + tailf /var/log/syslog 3) Press "Enter" 2 times 4) Notice the script process taking 100% CPU - This regression is rather new but I don't know which update introduced - it. Reverting util-linux/bsdutils to the previous version doesn't help - so maybe it's not even script's fault. tail/coreutils hasn't been update - in a long time so I'm not sure who's fault it is. I can reproduce the - problem with kernel 4.4.0-9-generic and 4.4.0-10-generic. - + This regression was introduced upstream by this commit: + https://git.kernel.org/cgit/utils/util-linux/util- + linux.git/commit/?id=54c6611d6f7b73609a5331f4d0bcf63c4af6429e $ lsb_release -rd Description: Ubuntu Xenial Xerus (development branch) Release: 16.04 $ apt-cache policy util-linux bsdutils coreutils util-linux: - Installed: 2.27.1-4ubuntu1 - Candidate: 2.27.1-4ubuntu1 - Version table: - *** 2.27.1-4ubuntu1 500 - 500 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages - 100 /var/lib/dpkg/status - 2.27.1-3ubuntu1 500 - 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages + Installed: 2.27.1-4ubuntu1 + Candidate: 2.27.1-4ubuntu1 + Version table: + *** 2.27.1-4ubuntu1 500 + 500 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages + 100 /var/lib/dpkg/status + 2.27.1-3ubuntu1 500 + 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages bsdutils: - Installed: 1:2.27.1-4ubuntu1 - Candidate: 1:2.27.1-4ubuntu1 - Version table: - *** 1:2.27.1-4ubuntu1 500 - 500 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages - 100 /var/lib/dpkg/status - 1:2.27.1-3ubuntu1 500 - 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages + Installed: 1:2.27.1-4ubuntu1 + Candidate: 1:2.27.1-4ubuntu1 + Version table: + *** 1:2.27.1-4ubuntu1 500 + 500 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages + 100 /var/lib/dpkg/status + 1:2.27.1-3ubuntu1 500 + 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages coreutils: - Installed: 8.25-2ubuntu2 - Candidate: 8.25-2ubuntu2 - Version table: - *** 8.25-2ubuntu2 500 - 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages - 100 /var/lib/dpkg/status + Installed: 8.25-2ubuntu2 + Candidate: 8.25-2ubuntu2 + Version table: + *** 8.25-2ubuntu2 500 + 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages + 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: util-linux 2.27.1-4ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-10.25-generic 4.4.3 Uname: Linux 4.4.0-10-generic x86_64 NonfreeKernelModules: zfs zunicode zcommon znvpair zavl ApportVersion: 2.20-0ubuntu3 Architecture: amd64 CurrentDesktop: Unity Date: Fri Mar 4 15:14:15 2016 SourcePackage: util-linux UpgradeStatus: No upgrade log present (probably fresh install) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
The above commit is from Debian's git. The problem still exists upstream in https://git.kernel.org/cgit/utils/util-linux/util- linux.git/commit/?id=44338f7fe6a529cef1f206dccd95e7282625c483 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
FYI, the current master (d38bcd109e9) still has the problem. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
After bisecting util-linux, the problematic commit is: 54c6611d6f7b73609a5331f4d0bcf63c4af6429e is the first bad commit commit 54c6611d6f7b73609a5331f4d0bcf63c4af6429e Author: Karel Zak Date: Wed Jun 17 15:48:50 2015 +0200 script: fix EOF problems * remove STDIN from poll() if: * STDIN already closed -- poll returns POLLHUP, for example: echo "date" | script * detect EOF as returned by read(), for example: script -c "echo Hello" < /dev/null * don't write to master when there is still something to read from slave (it means shell is not initialized yet or busy) Signed-off-by: Karel Zak :04 04 2cc2b7f5d69f16775151517912dce6ff3a586847 b1a8465b2c3f23c0f41bfb7308af49b92963e77b M term-utils When using v2.27.1 and reverting just this commit, all is fine. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
** Tags added: regression-release ** Also affects: util-linux (Ubuntu Xenial) Importance: High Status: Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
** Changed in: util-linux (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
16.04 is using linux util tagged at v2.27.1. I can reproduce the problem using the git source at tag 2.27.1 forward. The bug doesn't occur in v2.26.2 so this looks like a regression. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
Killing tail stops the runaway poll(). It might help to see what tail is doing as well. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
Ah -- I've been able to reproduce it. I'll run it in a debugger and see if I can isolate the problem. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
On 2016-03-05 12:10 AM, Pádraig Brady wrote: > Reproduced with script 2.27.1 which spins in this case continually > doing: > > poll([{fd=4, events=POLLIN}], 1, 10)= 1 ([{fd=4, revents=POLLIN}]) Yes, that's what strace'ing reveals in my case. ** Changed in: util-linux (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
Reproduced with script 2.27.1 which spins in this case continually doing: poll([{fd=4, events=POLLIN}], 1, 10)= 1 ([{fd=4, revents=POLLIN}]) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1553353] Re: tail'ing a file in a script session hangs
I couldn't reproduce it. Can you post strace output of script? There will be more than one script process -- chose the one that is consuming 100% CPU and run something like: $ strace -tt -p >/tmp/strace.out Let it run for about 15 seconds and exit. Then upload the output. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs