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[ANNOUNCEMENT] Updated: cygwin-1.7.10-1

Hi Cygwin friends and users,

I just released 1.7.10-1.  It introduces a couple of new APIs and some
changes which are supposed to reduce fork problems.  And lots of other
stuff.  Just read on.  for a start, here are the most distinct changes
from old behaviour:

- 1.7.10 drops support for Windows NT4 to reduce the amount of legacy code.

- The CYGWIN=tty mode has been removed.  Either just use the normal Windows
  console as is, or use a terminal application like mintty.

- New heap management.  Drop registry setting "heap_chunk_in_mb" entirely
  in favor of a new per-executable setting in the executable file header
  which can be set using the peflags tool (see `peflags --cygwin-heap').

As always, please have another look into the documentation at  It contains a few improvements and the
description for new features and changes from old behaviour.

What's new:

- New getconf tool for querying confstr(3), pathconf(3), sysconf(3), and
  limits.h configuration.

- New tzset utility to generate a POSIX-compatible TZ environment
  variable from the Windows timezone settings.

- The passwd tool now allows an administrator to use the -R command for
  other user accounts:  passwd -R username.

- Experimental: Change the way sockets are created so that Cygwin always
  circumvents so-called "layered service providers" (LSPs) starting with
  Windows Vista.

- signal handler functions are now dispatched in threads other than the
  main thread.

- Support NcFsd filesystem.

- clock_gettime(3) and clock_getres(3) accept per-process and per-thread
  CPU-time clocks, including CLOCK_PROCESS_CPUTIME_ID and

- New pthread functions:

  - Spin Locks: pthread_spin_destroy, pthread_spin_init, pthread_spin_lock,
    pthread_spin_trylock, pthread_spin_unlock.

  - Stack management: pthread_attr_getstack, pthread_attr_getstackaddr,
    pthread_attr_getguardsize, pthread_attr_setstack, pthread_attr_setstackaddr,
    pthread_attr_setguardsize, pthread_getattr_np.
  - Clock Selection: pthread_getcpuclockid, pthread_condattr_getclock,

  - Scheduling: pthread_setschedprio.

  - Signalling: pthread_sigqueue.

- Add /proc/devices, /proc/misc, /proc/sysvipc, /proc/swaps.

- Make various system functions thread cancelation points per POSIX.

- Add ioctl FIONREAD handling for non-sockets.

- dlopen now supports the Glibc-specific RTLD_NODELETE and RTLD_NOOPEN flags.

- The printf and wprintf families of functions now support the %m conversion

- Execed processes now inherit the children of their predecessor.

- Fifos have been rewritten and should now be more reliable.

- GNU/glibc error.h error reporting functions: error, error_at_line,
  error_message_count, error_one_per_line, error_print_progname.

- C99 <tgmath.h> type-generic macros.

- Other new API: clock_getcpuclockid, clock_nanosleep, clock_settime, __fpurge,
  get_current_dir_name, getgrouplist, getpt, ppoll, psiginfo, psignal,
  ptsname_r, sys_siglist, sysinfo.

- cygwin_conv_path_list finally supports CCP_WIN_W_TO_POSIX and
  CCP_POSIX_TO_WIN_W conversions.

What changed:

- Drop support for Windows NT4.

- The CYGWIN=tty mode using pipes to communicate with the console in a pseudo
  tty-like mode has been removed.  Either just use the normal Windows console
  as is, or use a terminal application like mintty.

- The CYGWIN environment variable options "envcache", "strip_title", "title",
  "tty", and "upcaseenv" have been removed.

- New heap management.  Drop registry setting "heap_chunk_in_mb" in favor of
  a new per-executable setting in the executable file header which can be set
  using the peflags tool.  Drop registry setting "heap_slop_in_mb" entirely.

- Revamp console and pseudo tty handling.  Rename /dev/ttyX to /dev/consX,
  /dev/ttyX to /dev/ptyX.

- Improve fork/exec performance on 64 bit systems.

- Improve Ctrl-C handling in console.

- Try harder to let fork not fail if DLLs are moved in memory which should,
  in some cases, minimize the need for rebaseall.

- Try harder to send SIGHUP to children when process group leader fails.

- Deal with Windows problem where non-blocking pipe I/O was not flushed
  properly on close.

- Attempt to regularize most syscall-related strace output.

- Improve behavior of Cygwin when started from a 64-bit process, especially
  under Windows 2003.

- Improve multi-thread/reentrancy safety with syscalls that deal with fds.

- dlopen can now find "cygFOO.dll", even if the caller specified "".
  This is supposed to support applications which are no aware of Windows DLLs.

- Make accept(2), poll(2) and shutdown(2) behave more like on Linux.

- Raise max number of mount points from 30 to 64.

- Output of /proc/maps is closer to what Linux prints and much more useful to
  examine process VM layout.

- /proc/loadavg now shows the number of currently running processes and the
  total number of processes.

- /proc/version now shows the username of whomever compiled the Cygwin DLL
  as well as the version of GCC used when compiling.

- Various assorted bugfixes and improvements.

- Preliminary, no guarantee, may be broken in subtle ways, Windows 8 support.

Have fun,

To update your installation, click on the "Install Cygwin now" link on
the web page.  This downloads setup.exe to your
system.  Then, run setup and answer all of the questions.


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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                cygwin AT cygwin DOT com
Red Hat, Inc.

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