[ANNOUNCEMENT] TEST RELEASE: Cygwin 2.5.0-0.7

[ANNOUNCEMENT] TEST RELEASE: Cygwin 2.5.0-0.7

[Corinna Vinschen]

Hi Cygwin friends and users,


I released a new Cygwin TEST version 2.5.0-0.7.

Refresh with the following changes:

- Preliminary patch to fix the getaddrinfo issue reported in
  https://cygwin.com/ml/cygwin/2015-07/msg00350.html.  Patch
  outlined in https://cygwin.com/ml/cygwin/2016-03/msg00211.html.

- Don't write the NULL SID deny ACE if the ACL is a simple POSIX ACL
  which is easy to handle.  I.e.:
  - Simple ACL with only three ACEs for owner, group and other
    (6 for a directory)
  - Owner permissions >= group permissions
  - Group permissions >= other permissions
  - No explicit mask value
  - No special POSIX permission bits (S_ISUID, S_ISGID, S_ISVTX).


Other changes compared to 2.4.1:

What's new:
-----------

- Full set of POSIX.1e ACL API functions now implemented.
  New APIs: acl_add_perm, acl_calc_mask, acl_clear_perms, acl_copy_entry,
  acl_copy_ext, acl_copy_int, acl_create_entry, acl_delete_def_file,
  acl_delete_entry, acl_delete_perm, acl_dup, acl_free, acl_from_text,
  acl_get_entry, acl_get_fd, acl_get_file, acl_get_permset, acl_get_qualifier,
  acl_get_tag_type, acl_init, acl_set_fd, acl_set_file, acl_set_permset,
  acl_set_qualifier, acl_set_tag_type, acl_size, acl_to_text, acl_valid.

- Most libacl extensions now implemented, too:
  New APIs: acl_check, acl_cmp, acl_entries, acl_equiv_mode, acl_error,
  acl_extended_fd, acl_extended_file, acl_extended_file_nofollow,
  acl_from_mode, acl_get_perm, acl_to_any_text.

- First implementation of pthread_barrier/pthread_barrierattr functions.
  New APIs: pthread_barrierattr_init, pthread_barrierattr_setpshared,
  pthread_barrierattr_getpshared, pthread_barrierattr_destroy,
  pthread_barrier_init, pthread_barrier_destroy, pthread_barrier_wait.

- New APIs: clog10, clog10f.


What changed:
-------------

- Including <sys/acl.h> now *only* includes the POSIX ACL API.  To include
  the old Solaris API, include <cygwin/acl.h>.

- In calls to chmod treat ACLs with extra ACEs *only* for Admins and
  SYSTEM like a trivial ACL.

- Bump POSIX option macros to POSIX.1-2008.

- Profiling data, specifically pc sampling, now covers all threads of a
  program and not just the main thread.  Environment variable GMON_OUT_PREFIX
  enables multiple gmon.out files to preserve profiling data after fork or
  from multiple program runs.


Bug Fixes
---------

- Fix potential hang when using LoadLibraryEx(LOAD_LIBRARY_SEARCH_SYSTEM32).
  Reported and tested via IRC.

- Fix a bug in ACL handling which might result in a spurious extra entry
  for the primary group.  Self-observed.

- printf(3): Handle multibyte decimal point in field size computation.
  Addresses: https://cygwin.com/ml/cygwin/2016-02/msg00014.html

- cygwin_conv_path: Always preserve trailing backslashes in conversion
  to POSIX paths.
  Addresses: https://cygwin.com/ml/cygwin/2016-01/msg00480.html

- Make buffered console characters visible to select().
  Addresses: https://cygwin.com/ml/cygwin/2014-12/msg00118.html

- Always report relocation problems, not only in debug DLL.
  Addresses: https://cygwin.com/ml/cygwin/2016-02/msg00147.html

- Don't spill network credentials of privileged user changing the user
  context via setuid method 1
  (https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-nopasswd1) into
  user session.
  Addresses: https://cygwin.com/ml/cygwin/2016-02/msg00101.html


Have fun,
Corinna


-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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Re: [ANNOUNCEMENT] TEST RELEASE: Cygwin 2.5.0-0.7

[Achim Gratz]

Corinna Vinschen <corinna-cygwin <at> cygwin.com> writes:
> I released a new Cygwin TEST version 2.5.0-0.7.

While testing this I got the following from tcsh:

> touch permtest
> chmod 0 permtest
> ./permtest
./permtest: Bad file descriptor.

I would have expected

$ ./permtest
./permtest: Permission denied.

which is what I indeed get with bash/dash.

I can't test at the moment if that was happening with 2.4.1 also.


Regards,
Achim.


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Re: [ANNOUNCEMENT] TEST RELEASE: Cygwin 2.5.0-0.7

[Corinna Vinschen]

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On Mar 17 15:27, Achim Gratz wrote:
> Corinna Vinschen <corinna-cygwin <at> cygwin.com> writes:
> > I released a new Cygwin TEST version 2.5.0-0.7.
> 
> While testing this I got the following from tcsh:
> 
> > touch permtest
> > chmod 0 permtest
> > ./permtest
> ./permtest: Bad file descriptor.
> 
> I would have expected
> 
> $ ./permtest
> ./permtest: Permission denied.
> 
> which is what I indeed get with bash/dash.
> 
> I can't test at the moment if that was happening with 2.4.1 also.

During execve the file is opened to check if it's a scrip or a real
executable.  If opening the file fails, Cygwin neglects to set the
correct error code so you just get the previous errno value.

Fixed in the git repo.


Thanks,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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