[ANNOUNCEMENT] [1.7] Updated: cygwin-1.7.0-43
Wed Mar 11 13:31:00 GMT 2009
I just uploaded a new Cygwin 1.7 test release, 1.7.0-43.
Cygwin 1.7 is a major jump from Cygwin 1.5.x. The list with all
changes related to Cygwin 1.5.25 is attached below.
If nothing goes overly wrong, the official 1.7.1 release goes public
within the next three months.
Just download http://cygwin.com/setup-1.7.exe and use that setup tool
to install Cygwin 1.7. As usual, please report bugs and problems to
the mailing list cygwin AT cygwin DOT com.
We also have a new User's Guide for 1.7, which is currently located at
We also now have new API documentation
And we have a new FAQ, though very likely not quite complete since
we still don't know what exactly *is* a FAQ realted to Cygwin 1.7.
Bug fixes and extensions to the documentation in the form of patches
to the source SGML files are much appreciated. The SGML sources are
located in the CVS repository under the winsup/doc directory, for
example here: http://cygwin.com/cgi-bin/cvsweb.cgi/src/winsup/doc/?cvsroot=src
Same goes for Cygwin patches in general, of course.
THIS IS STILL A TEST RELEASE. DON'T USE IN PRODUCTION ENVIRONMENTS.
Nevertheless I'd like to encourage everyone to give 1.7 a shot. Due to
internal changes it is possible to install a 1.7 release in parallel to
a 1.5 release and even run 1.7 processes in parallel to 1.5 processes.
* The processes will not know about each other! Any try to interact
* between 1.7-based and 1.5-based processes will lead to, at least, funny
To install a 1.7 release in parallel to a 1.5 release, all you have
to do is to choose another root directory (for instance: C:\cygwin-1.7)
in setup-1.7's "Choose Installation Directory" dialog.
* NOTE: Due to the way setup-1.7 works, you have to change the directory
* right the first time you visit this dialog! If you pressed the "Next"
* button and then "Back" again, it's already too late and setup-1.7 will
* create a broken 1.7 install. If you pressed "Next" by mistake, exit
* setup-1.7 and start it again.
What's new in contrast to 1.7.0-42
- New functions wscanf, fwscanf, swscanf, vwscanf, vfwscanf, vswscanf,
wcscasecmp, wcsncasecmp, wcsftime.
These functions were the last wide-char functions missing in Cygwin
apart from wcstold, which is missing due to missing long double
support in Newlib, and the newly defined locale specific str/wcsFOO_l
functions from POSIX-1.2008.
- New function gethostbyname2.
- New send/recv flag MSG_DONTWAIT.
- Fix usage text typo in cygcheck.
- Q: How do I know that I'm running Cygwin 1.7.0-43?
A: The `uname -v' command prints "2009-03-11 14:08"
Here's the list of user-visible changes in 1.7.0 related to 1.5.25:
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 at one point. The setting of $LANG or $LC_CTYPE
will be used instead.
- struct dirent now supports d_type, filled out with DT_REG or DT_DIR.
All other file types return as DT_UNKNOWN for performance reasons.
- The CYGWIN environment variable options "ntsec" and "smbntsec" have
been replaced by the per-mount option "acl"/"noacl".
- The CYGWIN environment variable option "ntea" has been removed without
- The CYGWIN environment variable option "check_case" has been removed
in favor of real case-sensitivity on file systems supporting it.
- 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.
- Due to the above changes, managed mounts have been removed.
- Incoming DOS paths are always handled case-insensitive and get no POSIX
permission, as if they are mounted with noacl,posix=0 mount flags.
- 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.
- New open(2) flags O_DIRECTORY, O_EXEC and O_SEARCH.
- Handle NTFS native symlinks available since Vista/2008 as symlinks
(but don't create Vista/2008 symlinks due to unfortunate OS restrictions).
- 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)
- 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.
- List servers of all accessible domains and workgroups in // instead of
just the servers in the own domain/workgroup.
- Support Linux-like extended attributes ([fl]getxattr, [fl]listxattr,
- 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,
- Other new APIs: posix_fadvise, posix_fallocate, funopen, fopencookie,
open_memstream, open_wmemstream, 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.
- send/sendto/sendmsg now send data in 64K chunks to circumvent an
internal buffer problem in WinSock (KB 201213).
- New send/recv option MSG_DONTWAIT.
- 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, gethostbyname2, 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.
- The CYGWIN environment variable option "binmode" has been removed.
- Improved fifo handling by using native Windows named pipes.
- 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: cfmakeraw, posix_openpt.
Other POSIX related changes:
- Allow multiple concurrent read locks per thread for pthread_rwlock_t.
- 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>
- New APIs: _Exit, confstr, insque, remque, sys_sigabbrev,
posix_madvise, posix_memalign, reallocf,
exp10, exp10f, pow10, pow10f, lrint, lrintf, rint, rintf, llrint, llrintf,
llrintl, lrintl, rintl,
mbsnrtowcs, strcasestr, stpcpy, stpncpy, wcpcpy, wcpncpy, wcsnlen,
wcsnrtombs, wcsftime, wcstod, wcstof, wcstoimax, wcstok, wcstol, wcstoll,
wcstoul, wcstoull, wcstoumax, wcsxfrm, wcscasecmp, wcsncasecmp,
fgetwc, fgetws, fputwc, fputws, fwide, getwc, getwchar, putwc, putwchar,
ungetwc, asnprintf, dprintf, vasnprintf, vdprintf,
wprintf, fwprintf, swprintf, vwprintf, vfwprintf, vswprintf,
wscanf, fwscanf, swscanf, vwscanf, vfwscanf, vswscanf.
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
- Cygwin now allows to store and use user passwords in a hidden area of
the registry. This is tried first when Cygwin is called by privileged
processes to switch the user context. This allows, for instance,
ssh public key sessions with full network credentials to access shares
on other machines.
- The mkpasswd and mkgroup tools have changed behaviour and a couple of
new options to ease consistent usage in multi-machine or multi-domain
- New ldd utility, similar to Linux.
- 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.
- The CYGWIN environment variable option "server" has been removed.
Cygwin automatically uses cygserver if it's available.
- Allow environment of arbitrary size instead of a maximum of 32K.
- Don't force uppercase environment when started from a non-Cygwin process.
Except for certain Windows and POSIX variables which are always uppercased,
preserve environment case. Switch back to old behaviour with the new
- 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.
- Add the ability to distinguish registry keys and registry values with the
same name in the same registry subtree. The key is called "foo" and the
value will be called "foo%val" in this case.
- Align /proc/cpuinfo more closly to Linux content.
- Add /proc/$PID/mounts entries and a symlink /proc/mounts pointing to
/proc/self/mounts as on Linux.
- 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.
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