[Bug 1691636] Re: Incorrect timestamps on unzipped files.

Thu Jun 1 09:36:49 UTC 2023

Thank you for reporting this bug in the first place! Thank you for
taking the time to report this bug in the first place and helping to
make Ubuntu better.

I still think this is not a bug. I will set this to Invalid for now, but
please write comment if you think otherwise.

** Changed in: unzip (Ubuntu)
       Status: Confirmed => Invalid

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https://bugs.launchpad.net/bugs/1691636

Title:
  Incorrect timestamps on unzipped files.

Status in unzip package in Ubuntu:
  Invalid

Bug description:
  Description of problem:

  Unzip will sometimes round up timestamps of unpacked files.  This
  results in a 1-second difference between the timestamp shown via
  zipinfo -T, and the unzipped file on disk

  Steps to Reproduce:
  1.  Zip files with different timestamps.
  2.  Note the timestamps stored in the archive with `zipinfo -T`
  3.  Unzip the archive
  4.  Compare the timestamps with `ls --full-time`
  5.  Note a difference of 1 second on some files.

  Actual results:
  Timestamps are off by a second on some files

  Expected results:
  Timestamps should match between zipinfo and ls.

  Example -- note the timestamps on file "2"

  $ touch 1
  $ zip test.zip 1
    adding: 1 (stored 0%)
  $ touch 2
  $ zip test.zip 2
    adding: 2 (stored 0%)
  $ touch 3
  $ zip test.zip 3
    adding: 3 (stored 0%)
  $ ls --full-time
  total 4
  -rw-r--r-- 1 root root   0 2017-05-17 22:22:30.596313711 -0500 1
  -rw-r--r-- 1 root root   0 2017-05-17 22:22:35.196210798 -0500 2
  -rw-r--r-- 1 root root   0 2017-05-17 22:22:40.124112963 -0500 3
  -rw-r--r-- 1 root root 412 2017-05-17 22:22:43.224057225 -0500 test.zip
  $ rm -f 1 2 3
  $ unzip test.zip
  Archive:  test.zip
   extracting: 1
   extracting: 2
   extracting: 3
  $ ls --full-time
  total 4
  -rw-r--r-- 1 root root   0 2017-05-17 22:22:30.000000000 -0500 1
  -rw-r--r-- 1 root root   0 2017-05-17 22:22:36.000000000 -0500 2
  -rw-r--r-- 1 root root   0 2017-05-17 22:22:40.000000000 -0500 3
  -rw-r--r-- 1 root root 412 2017-05-17 22:22:43.224057225 -0500 test.zip
  $ zipinfo -T test.zip
  Archive:  test.zip
  Zip file size: 412 bytes, number of entries: 3
  -rw-r--r--  3.0 unx        0 bx stor 20170517.222230 1
  -rw-r--r--  3.0 unx        0 bx stor 20170517.222235 2
  -rw-r--r--  3.0 unx        0 bx stor 20170517.222240 3
  3 files, 0 bytes uncompressed, 0 bytes compressed:  0.0%

  $ lsb_release -rd
  Description:    Ubuntu 16.04.2 LTS
  Release:        16.04
  $ apt-cache policy zip unzip
  zip:
    Installed: 3.0-11
    Candidate: 3.0-11
    Version table:
   *** 3.0-11 500
          500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status
  unzip:
    Installed: 6.0-20ubuntu1
    Candidate: 6.0-20ubuntu1
    Version table:
   *** 6.0-20ubuntu1 500
          500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

  $ cat /etc/os-release
  NAME="Ubuntu"
  VERSION="16.04.2 LTS (Xenial Xerus)"
  ID=ubuntu
  ID_LIKE=debian
  PRETTY_NAME="Ubuntu 16.04.2 LTS"
  VERSION_ID="16.04"
  HOME_URL="http://www.ubuntu.com/"
  SUPPORT_URL="http://help.ubuntu.com/"
  BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
  VERSION_CODENAME=xenial
  UBUNTU_CODENAME=xenial

  $ dpkg -s zip unzip
  Package: zip
  Status: install ok installed
  Priority: optional
  Section: utils
  Installed-Size: 573
  Maintainer: Ubuntu Developers <ubuntu-devel-discuss at lists.ubuntu.com>
  Architecture: amd64
  Multi-Arch: foreign
  Version: 3.0-11
  Depends: libbz2-1.0, libc6 (>= 2.14)
  Recommends: unzip
  Description: Archiver for .zip files
   This is InfoZIP's zip program. It produces files that are fully
   compatible with the popular PKZIP program; however, the command line
   options are not identical. In other words, the end result is the same,
   but the methods differ. :-)
   .
   This version supports encryption.
  Original-Maintainer: Santiago Vila <sanvila at debian.org>
  Homepage: http://www.info-zip.org/Zip.html

  Package: unzip
  Status: install ok installed
  Priority: optional
  Section: utils
  Installed-Size: 518
  Maintainer: Ubuntu Developers <ubuntu-devel-discuss at lists.ubuntu.com>
  Architecture: amd64
  Multi-Arch: foreign
  Version: 6.0-20ubuntu1
  Depends: libbz2-1.0, libc6 (>= 2.14)
  Suggests: zip
  Description: De-archiver for .zip files
   InfoZIP's unzip program. With the exception of multi-volume archives
   (ie, .ZIP files that are split across several disks using PKZIP's /& option),
   this can handle any file produced either by PKZIP, or the corresponding
   InfoZIP zip program.
   .
   This version supports encryption.
  Homepage: http://www.info-zip.org/UnZip.html
  Original-Maintainer: Santiago Vila <sanvila at debian.org>

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: unzip 6.0-20ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-62.83-generic 4.4.40
  Uname: Linux 4.4.0-62-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  Date: Wed May 17 22:40:25 2017
  Dependencies:
   gcc-6-base 6.0.1-0ubuntu1
   libbz2-1.0 1.0.6-8
   libc6 2.23-0ubuntu7
   libgcc1 1:6.0.1-0ubuntu1
  InstallationDate: Installed on 2017-05-18 (0 days ago)
  InstallationMedia: Ubuntu-Server 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.8)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: unzip
  UpgradeStatus: No upgrade log present (probably fresh install)

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