New Cygwin 1.7.0-18 in release-2

[Corinna Vinschen <corinna-cygwin at cygwin dot com>]

Hi,

again I would like to encourage the Cygwin maintainers, to try the new
Cygwin 1.7.0 release and to look for problems in their packages which
might be a result of the fairly massive changes in Cygwin 1.7.  I
attached a list of the changes below.  The latest changes are:

- Changes in mkpasswd/mkgroup and in seteuid() should result in more
  correct user tokens in AD domains.  Try the LSA module.
- Case-sensitivity on NTFS and NFS and mount option "posix=[0|1]".
- Remove CYGWIN=ntsec and CYGWIN=smbntsec options in favor of a mount
  option "acl"/"noacl".

Download a 1.7 distro using http://cygwin.com/setup-1.7.exe

Cygwin 1.7 and 1.5 can run in parallel sessions on the same machine, but
the installation in parallel needs some manual intervention.  Setup.exe
is not yet using the new registry location and will happily install into
your 1.5 installation dir...

Brian, any timeframe for a new setup for 1.7?

I made new documentation available, which just isn't yet finished.  Have
a look into http://cygwin.com/1.7/cygwin-ug-net.html.  The missing
pieces are changes to the utilities, half of the "NT Security" chapter
is still old, and some bits of information on NFS access.  A new FAQ is
also not available yet.  However, the docs already explain how to use
the new /etc/fstab and /etc/fstab.d/${USER} files, the available
mount options, how to tweak the system to get case-sensitivity, etc.

Please test and please create new packages for 1.7 as far as necessary.
I really think we should prepare to push out an official 1.7 release in
2008.


Corinna

--- List of changes:

OS releated changes:
--------------------

- Windows 95, 98 and Me are not supported anymore.  The new DLL will
  not run on any of these systems.

File Access related changes:
----------------------------

- Mount points are no longer stored in the registry.  Use /etc/fstab
  and /etc/fstab.d/$USER instead.  Mount points created with mount(1)
  are only local to the current session and disappear when the last
  Cygwin process in the session exits.

- PATH_MAX is now 4096.  Internally, path names can be as long as the
  underlying OS can handle (32K).
  
- UTF-8 filenames are supported now.  So far, this requires to set
  the environment variable CYGWIN to contain "codepage:utf8", but this
  will likely disappear in a few weeks time.  The setting of $LANG or
  $LC_CTYPE will be used instead.

- The CYGWIN environment variable options "ntsec" and "smbntsec" have
  been replaced by the per-mount option "acl"/"noacl".

- The CYGWIN environment variable option "check_case" has been removed.

- Creating filenames with special DOS characters '"', '*', ':', '<',
  '>', '|' is supported.

- Creating files with special DOS device filename components ("aux",
  "nul", "prn") is supported.

- File name are case sensitive if the OS and the underlying file system
  supports it.  Works on NTFS and NFS.  Does not work on FAT and Samba
  shares.  Requires to change a registry key (see the user's guide).
  Can be switched off on a per-mount base.

- unlink(2) and rmdir(2) try very hard to remove files/directories even
  if they are currently accessed or locked.  This is done by utilizing
  the hidden recycle bin directories and marking the files for deletion.

- rename(2) rewritten to be more POSIX conformant.

- Add st_birthtim member to struct stat.

- File locking is now advisory, not mandatory anymore.  The fcntl(2) and
  the new lockf(2) APIs create and maintain locks with POSIX semantics,
  the flock(2) API creates and maintains locks with BSD semantics.
  POSIX and BSD locks are independent of each other.

- Implement atomic O_APPEND mode.

- Handle NTFS native symlinks available since Vista/2008 as symlinks.

- Recognize NFS shares and handle them using native mechanisms.
  Recognize and create real symlinks on NFS shares.  Get correct
  stat(2) information and set real mode bits on open(2), mkdir(2)
  and chmod(2).

- Recognize Netapp DataOnTap drives and fix inode number handling.

- Recognize Samba version beginning with Samba 3.0.28a using the new
  extended version information negotiated with the Samba developers.

- Support Linux-like extended attributes ([fl]getxattr, [fl]listxattr,
  [fl]setxattr, [fl]removexattr).

- New file conversion API for conversion from Win32 to POSIX path and
  vice versa (cygwin_conv_path, cygwin_create_path, cygwin_conv_path_list).

- New openat family of functions: openat, faccessat, fchmodat, fchownat,
  fstatat, futimesat, linkat, mkdirat, mkfifoat, mknodat, readlinkat, renameat,
  symlinkat, unlinkat.

- Other new APIs: posix_fadvise, posix_fallocate, funopen, fopencookie,
  open_memstream, fmemopen, fdopendir.

Network related changes:
------------------------

- New implementation for blocking sockets and select on sockets which
  is supposed to allow POSIX-compatible sharing of sockets between
  threads and processes.

- Restrict send/sendto/sendmsg to send never more than 64K to circumvent
  internal buffer problem in WinSock.  (May need rework)

- IPv6 support.  New API getaddrinfo, getnameinfo, freeaddrinfo,
  gai_strerror, in6addr_any, in6addr_loopback.  On IPv6-less systems,
  replacement functions are available for IPv4.  On systems with IPv6
  enabled, the underlying WinSock functions are used.  While I tried
  hard to get the functionality as POSIXy as possible, keep in mind that
  a *fully* conformant implementation of getaddrinfo and other stuff is
  only available starting with Windows Vista/2008.

- Resolver functions (res_init, res_query, res_search, res_querydomain,
  res_mkquery, res_send, dn_comp, dn_expand) are now part of Cygwin.
  Applications don't have to link against minires anymore.  Actually,
  this *is* the former libminires.a.

- rcmd is now implemented inside of Cygwin, instead of calling the
  WinSock function.  This allows rsh(1) usage on Vista/2008, which
  dropped this function from WinSock.

- Define multicast structures in netinet/in.h.  Note that fully
  conformant multicast support is only available beginning with Vista/2008.

- Improve get_ifconf.  Redefine struct ifreq and subsequent datastructures
  to be able to keep more information.  Support SIOCGIFINDEX, SIOCGIFDSTADDR
  and the Cygwin specific SIOCGIFFRNDLYNAM.  Support real interface flags
  on systems supporting them.

- Other new APIs: bindresvport, bindresvport_sa, iruserok_sa, rcmd_af,
  rresvport_af.  getifaddrs, freeifaddrs, if_nametoindex, if_indextoname,
  if_nameindex, if_freenameindex.

- Add /proc/net/if_inet6.

Device related changes:
-----------------------

- Reworked pipe implementation which uses overlapped IO to create
  more reliable interruptible pipes and fifos.

- Reworked pipe handling for better speed and better support for signal
  processing.

- Improved fifo handling.

- Detect when a stdin/stdout which looks like a pipe is really a tty.
  Among other things, this allows a debugged application to recognize that
  it is using the same tty as the debugger.

- Support UTF-8 in console window.

- Support up to 64 serial interfaces using /dev/ttyS0 - /dev/ttyS63.

- Support up to 128 raw disk drives /dev/sda - /dev/sddx.

- New API: posix_openpt.

Other POSIX related changes:
----------------------------

- Implement pthread_kill(thread, 0) as per POSIX.

- New API for POSIX IPC:
  Named semaphores: sem_open, sem_close, sem_unlink.
  Message queues: mq_open, mq_getattr, mq_setattr, mq_notify, mq_send,
  mq_timedsend, mq_receive, mq_timedreceive, mq_close, mq_unlink.
  Shared memory: shm_open, shm_unlink.

- Only declare expected functions in <strings.h>, don't include <string.h>
  from here.

- New APIs: asnprintf, dprintf, _Exit, vasnprintf, vdprintf, confstr,
  posix_madvise, posix_memalign, exp10, exp10f, pow10, pow10f, lrint,
  lrintf, rint, rintf, llrint, llrintf, llrintl, lrintl, rintl insque,
  remque, sys_sigabbrev, strcasestr, stpcpy, stpncpy, wcpcpy, wcpncpy,
  wcstol, wcstoll, wcstoul, wcstoull, wcsxfrm.

Security related changes:
-------------------------

- Getting a domain user's groups is hopefully more bulletproof now.

- Cygwin now comes with a real LSA authentication package.  This must
  be manually installed by a privileged user using the /bin/cyglsa-config
  script.  The advantages and disadvantages are noted in
  http://cygwin.com/ml/cygwin-developers/2006-11/msg00000.html

- Drop CYGWIN=ntea fake.

Miscellanous:
-------------

- Fallout from the long path names: If the current working directory is
  longer than 260 bytes, or if the current working directory is a virtual
  path (like /proc, /cygdrive, //server), don't call native Win32 programs
  since they don't understand these paths.

- On the first usage of a DOS path (C:\foo, \\foo\bar), the Cygwin DLL
  emits a scary warning that DOS paths shouldn't be used.  There's also
  the new CYGWIN=nodosfilewarning setting to disable that.

- Allow environment of arbitrary size instead of a maximum of 32K.

- Detect and report a missing DLL on process startup.

- Add /proc/registry32 and /proc/registry64 paths to access 32 bit and
  64 bit registry on 64 bit systems.

- Align /proc/cpuinfo more closly to Linux content.

- Optimized strstr and memmem implementation.

- Remove backwards compatibility with old signal masks (some *very* old
  programs which use signal masks may no longer work correctly).

- Numerous bug fixes.

- Probably a couple of entirely new bugs.


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