[Bug 195792] Re: getfacl display some characters as escaped octal in username

[Logan Rosen]

** Bug watch added: Debian Bug tracker #357141
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=357141

** Also affects: acl (Debian) via
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=357141
   Importance: Unknown
       Status: Unknown

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https://bugs.launchpad.net/bugs/195792

Title:
  getfacl display some characters as escaped octal in username

Status in acl package in Ubuntu:
  Confirmed
Status in acl package in Debian:
  Unknown

Bug description:
  Binary package hint: acl

  When a user have various non-standard characters in usernames (such as
  "é" or "\"), and there are ACL for that user, getfacl display the
  unusual characters as octal.

  While it may not be correct to have these characters in Unix username,
  the backslash is often found in username when using the winbind NSS
  backend for passwd.  As such, it is a very common use case.

  Moreover, ls and other tools from coreutils behave as expected and
  show the non-standard characters correctly.

  Example:

  ----------------------------------------------------------------------------------------------
  ubuntu at test-eg:~/test$ touch test1
  ubuntu at test-eg:~/test$ setfacl -m u:CANONICAL\\etienne:rwx test1
  ubuntu at test-eg:~/test$ getfacl test1
  # file: test1
  # owner: ubuntu
  # group: ubuntu
  user::rw-
  user:lp:rwx
  user:CANONICAL\134etienne:rwx
  group::r-x
  mask::rwx
  other::r--

  ubuntu at test-eg:~/test$ sudo chown CANONICAL\\etienne test1
  ubuntu at test-eg:~/test$ ls -l test1
  -rw-rwxr--+ 1 CANONICAL\etienne ubuntu 0 2008-02-26 00:17 test1
  ubuntu at test-eg:~/test$ touch test2
  ubuntu at test-eg:~/test$ setfacl -m u:testé:rwx test2
  ubuntu at test-eg:~/test$ getfacl test2
  # file: test2
  # owner: ubuntu
  # group: ubuntu
  user::rw-
  user:lp:rwx
  user:test\303\251:rwx
  group::r-x
  mask::rwx
  other::r--

  ubuntu at test-eg:~/test$ sudo chown testé test2
  ubuntu at test-eg:~/test$ ls -l test2
  -rw-rwxr--+ 1 testé ubuntu 0 2008-02-26 00:17 test2
  ---------------------------------------------------------------------------------------------------

  Note that, in the above example, the backslash have to be escaped with
  another backslash (ie, "\\") to prevent interpretation by the shell;
  the username have a single backslash indeed.

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