After bisecting util-linux, the problematic commit is: 54c6611d6f7b73609a5331f4d0bcf63c4af6429e is the first bad commit commit 54c6611d6f7b73609a5331f4d0bcf63c4af6429e Author: Karel Zak <k...@redhat.com> 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 <k...@redhat.com> :040000 040000 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 Touch seeded packages, which is subscribed to util-linux in Ubuntu. https://bugs.launchpad.net/bugs/1553353 Title: tail'ing a file in a script session hangs Status in util-linux package in Ubuntu: Confirmed Status in util-linux source package in Xenial: Confirmed Bug description: 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 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. $ 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 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 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 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1553353/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp