This bug was fixed in the package squashfs-tools - 1:4.3-4ubuntu1.1 --------------- squashfs-tools (1:4.3-4ubuntu1.1) artful; urgency=medium
* debian/patches/0008-unsquashfs-preserve-symlink-times.patch: Preserve atime and mtime of symlink inodes in unsquashfs rather than using the current time (LP: #1555305) -- Tyler Hicks <tyhi...@canonical.com> Mon, 11 Dec 2017 20:51:14 +0000 ** Changed in: squashfs-tools (Ubuntu Artful) Status: Fix Committed => Fix Released -- You received this bug notification because you are a member of नेपाली भाषा समायोजकहरुको समूह, which is subscribed to Xenial. Matching subscriptions: Ubuntu 16.04 Bugs https://bugs.launchpad.net/bugs/1555305 Title: resquashfs test fails if snap has symlinks Status in click-reviewers-tools package in Ubuntu: Invalid Status in squashfs-tools package in Ubuntu: Fix Released Status in squashfs-tools source package in Trusty: Fix Released Status in squashfs-tools source package in Xenial: Fix Released Status in squashfs-tools source package in Zesty: Fix Released Status in squashfs-tools source package in Artful: Fix Released Status in squashfs-tools source package in Bionic: Fix Released Bug description: [Impact] * The unsquashfs utility does not preserve atime and mtime timestamps of symlink inodes when unpacking squashfs images. * This makes it impossible to use a combination of unsquashfs and mksquashfs to sanity check snaps uploaded to the snap store since the resulting snap will not match the original snap due to symlink times being set to the current time when unsquashfs was executed. [Test Case] * Extract the test image: $ unsquashfs -d lp1555305 lp1555305.squashfs * Check the timestamp of the "link" file $ ls -al lp1555305/link * Incorrect output (timestamp will be current time): lrwxrwxrwx 1 tyhicks tyhicks 4 Dec 11 22:05 link -> file * Expected output: lrwxrwxrwx 1 tyhicks tyhicks 4 Aug 25 1991 /tmp/lp1555305/link -> file [Regression Potential] * The regression potential is small as long as there is no software out there that depends on the behavior of setting symlink timestamps to the current time. I highly doubt that there is anything out there that relies on that behavior but there's always a chance. [Original Descipription] Create the files: $ mkdir test $ cd test $ touch foo $ ln -s foo bar $ mkdir meta $ cat >meta/snap.yaml <<EOM name: test version: 1.0 architectures: [all] EOM Create the initial snap $ cd .. $ snapcraft snap ./test ... Snapped test_1.0_all.snap Unsquash the snap: $ unsquashfs -d unsquashed test_1.0_all.snap Parallel unsquashfs: Using 4 processors 3 inodes (2 blocks) to write [=======================================================================|] 2/2 100% created 2 files created 2 directories created 1 symlinks created 0 devices created 0 fifos Resquash the snap (the sleep is to make sure the time changes on the symlink): $ unsquashfs -fstime ./test_1.0_all.snap 1457551603 $ mksquashfs ./unsquashed ./test_1.0_all.snap.repacked -fstime 1457551603 -noappend -comp xz -all-root -no-xattrs ... Compare: $ sha512sum test_1.0_all.snap 40a15430503783541b362942491ee614b16941676d6c3edd86005af7b6b0782374e41c0c006dccb3a164d2c0270ace66639fcdee5ece3571db1c7544d59030e3 test_1.0_all.snap $ sha512sum test_1.0_all.snap.repack d8b9626337b8f09288f6aab675041dba639523437dd1d8f11b3f883cfa73ea434f2be06f5cd9cdec4ac9bdf2a40f8b484dc516ec851870c81be133cbdebf35a4 test_1.0_all.snap.repack Removing the symlink makes the check work. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/click-reviewers-tools/+bug/1555305/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~group.of.nepali.translators Post to : group.of.nepali.translators@lists.launchpad.net Unsubscribe : https://launchpad.net/~group.of.nepali.translators More help : https://help.launchpad.net/ListHelp