Nautilus Extract Here interprets backslashes as characters not directories

[Vaclav Petras]

Nautilus 3.4.2 Extract Here function interprets backslashes as characters not directories in a ZIP file which probably has directories saved in some MS Windows way, so that directories are stored using backslash.

I run Extract Here on a ZIP file and the result are files with backslash in file name, e.g.

lf78011331_US_DEM/US_DEM\info\arc0000.nit
lf78011331_US_DEM/US_DEM\us_dem\dblbnd.adf

The expected result is what unzip gives me, e.g.:

US_DEM/info/arc0000.nit
US_DEM/us_dem/dblbnd.adf

UnZip 6.00 of 20 April 2009 recognizes the directory structure and creates correct file names and directories.

I had this problem with the attached ZIP file (public domain data from USGS) with content:
./US_DEM.grid.aux
./US_DEM.prj
./us_dem
./us_dem/sta.adf
./us_dem/prj.adf
...
./Metadata.dbf
...
./info
./info/arc0000.nit
./info/arc0002.nit
...
./Metadata.prj

(two sub-directories: us_dem and info, everything is in one parent directory US_DEM)

lsb_release -rd

Description: Ubuntu 12.04.4 LTS
Release: 12.04

apt-cache policy pkgname

nautilus:
  Installed: 1:3.4.2-0ubuntu8
  Candidate: 1:3.4.2-0ubuntu9
  Version table:
     1:3.4.2-0ubuntu9 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main i386 Packages
 *** 1:3.4.2-0ubuntu8 0
        100 /var/lib/dpkg/status
     1:3.4.1-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise/main i386 Packages

unzip:
  Installed: 6.0-4ubuntu2
  Candidate: 6.0-4ubuntu2
  Version table:
 *** 6.0-4ubuntu2 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main i386 Packages
        100 /var/lib/dpkg/status
     6.0-4ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise/main i386 Packages

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Martin Wildam (mwildam)]

Approximately every 2 weeks I am downloading a few ZIP files from the same location (they change usually about once a week containing windows setup files). Suddenly I am experiencing this issue (using Ubuntu 14.04 - Archive Manager v3.10.2.1) with these zips. I cannot see any related update being done on my machine lately that may have introduced this behaviour.

However, extracting the ZIP on the commandline using 'unzip' produces the desired output.
I tried unzip on the commandline also with the zip that has been attached by Vaclav Petras and that also works here on the commandline but not using file-roller or Extract... in Nautilus.

[Martin Wildam (mwildam)]

Update: Not a problem of FileRoller - ZIP was created under Windows
using PowerShell and that thing has a bug in creating ZIPs. They use
backslashes in filenames rather than forward slashes which does not
meet the standard.

Best regards, Martin.