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What's new:
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- New, unified implementation of POSIX permission and ACL handling. The
new ACLs now store the POSIX ACL MASK/CLASS_OBJ permission mask, and
they allow to inherit the S_ISGID bit. ACL inheritance now really
works as desired, in a limited, but theoretically equivalent fashion
even for non-Cygwin processes.
To accommodate standard Windows ACLs, the POSIX permissions of the
owner and all other users in the ACL are computed using the Windows
AuthZ API. This may slow down the computation of POSIX permissions
noticably in some circumstances, but is generally more correct. The
new code also ignores SYSTEM and Administrators group permissions when
computing the MASK/CLASS_OBJ permission mask on old ACLs, and it
doesn't deny access to SYSTEM and Administrators group based on the
value of MASK/CLASS_OBJ when creating the new ACLs.
The new code now handles the S_ISGID bit on directories as on Linux:
Setting S_ISGID on a directory causes new files and subdirs created
within to inherit its group, rather than the primary group of the user
who created the file. This only works for files and directories
created by Cygwin processes.
- New API: rpmatch.
What changed:
-------------
- setfacl(1) now allows to use the -b and -k option combined to allow reducing
an ACL to only reflect standard POSIX permissions.
- Fix (numeric and monetary) decimal point and thousands separator in
fa_IR and ps_AF locales to be aligned with Linux.
Bug Fixes
---------
- Replaced old, buggy strtold implementation with well-tested gdtoa version
from David M. Gay.
Addresses: https://cygwin.com/ml/cygwin/2015-11/msg00205.html
- Fix handling of relative paths in native symlinks if the target is in a
drive's root dir or one level below.
Addresses: https://cygwin.com/ml/cygwin/2015-11/msg00277.html
- Fix a SEGV when calling `kill -l 0'.
Addresses: https://cygwin.com/ml/cygwin/2015-11/msg00430.html
- Fix a race condition in signal handling.
Addresses: https://cygwin.com/ml/cygwin/2015-11/msg00387.html
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