317 lines
12 KiB
Plaintext
317 lines
12 KiB
Plaintext
<sect1 id="ov-new1.7"><title>What's new and what changed in Cygwin 1.7</title>
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<sect2 id="ov-new1.7-os"><title>OS related changes</title>
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<screen>
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- Windows 95, 98 and Me are not supported anymore. The new Cygwin 1.7 DLL
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will not run on any of these systems.
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</screen>
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</sect2>
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<sect2 id="ov-new1.7-file"><title>File Access related changes</title>
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<screen>
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- Mount points are no longer stored in the registry. Use /etc/fstab
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and /etc/fstab.d/$USER instead. Mount points created with mount(1)
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are only local to the current session and disappear when the last
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Cygwin process in the session exits.
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- Cygwin creates the mount points for /, /usr/bin, and /usr/lib automatically
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from it's own position on the disk. They don't have to be specified in
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/etc/fstab.
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- If a filename cannot be represented in the current character set,
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the character will be converted to a sequence Ctrl-N + UTF-8 representation
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of the character. This allows to access all files, even those not
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having a valid representation of their filename in the current character
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set (codepage). To always have a valid string, use the UTF-8 charset
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by setting the environment variable $LANG, $LC_ALL, or $LC_CTYPE to a
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valid POSIX value, for instance in Cygwin.bat like this:
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set LC_CTYPE=en_US.UTF-8
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- PATH_MAX is now 4096. Internally, path names can be as long as the
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underlying OS can handle (32K).
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- struct dirent now supports d_type, filled out with DT_REG or DT_DIR.
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All other file types return as DT_UNKNOWN for performance reasons.
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- The CYGWIN environment variable options "ntsec" and "smbntsec" have
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been replaced by the per-mount option "acl"/"noacl".
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- The CYGWIN environment variable option "ntea" has been removed without
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substitute.
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- The CYGWIN environment variable option "check_case" has been removed
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in favor of real case-sensitivity on file systems supporting it.
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- Creating filenames with special DOS characters '"', '*', ':', '<',
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'>', '|' is supported.
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- Creating files with special DOS device filename components ("aux",
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"nul", "prn") is supported.
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- File names are case sensitive if the OS and the underlying file system
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supports it. Works on NTFS and NFS. Does not work on FAT and Samba
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shares. Requires to change a registry key (see the user's guide).
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Can be switched off on a per-mount base.
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- Due to the above changes, managed mounts have been removed.
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- Incoming DOS paths are always handled case-insensitive and get no POSIX
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permission, as if they are mounted with noacl,posix=0 mount flags.
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- unlink(2) and rmdir(2) try very hard to remove files/directories even
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if they are currently accessed or locked. This is done by utilizing
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the hidden recycle bin directories and marking the files for deletion.
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- rename(2) rewritten to be more POSIX conformant.
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- Add st_birthtim member to struct stat.
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- File locking is now advisory, not mandatory anymore. The fcntl(2) and
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the new lockf(2) APIs create and maintain locks with POSIX semantics,
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the flock(2) API creates and maintains locks with BSD semantics.
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POSIX and BSD locks are independent of each other.
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- Implement atomic O_APPEND mode.
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- New open(2) flags O_DIRECTORY, O_EXEC and O_SEARCH.
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- Make the "plain file with SYSTEM attribute set" style symlink
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default again when creating symlinks. Only create Windows shortcut
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style symlinks if CYGWIN=winsymlinks is set in the environment.
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- Symlinks now use UTF-16 encoding for the target filename for
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better internationalization support. Cygwin 1.7 can read all old style
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symlinks, but the new style is not compatible with older Cygwin releases.
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- Handle NTFS native symlinks available since Vista/2008 as symlinks
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(but don't create Vista/2008 symlinks due to unfortunate OS restrictions).
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- Recognize NFS shares and handle them using native mechanisms.
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Recognize and create real symlinks on NFS shares. Get correct
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stat(2) information and set real mode bits on open(2), mkdir(2)
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and chmod(2).
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- Recognize Netapp DataOnTap drives and fix inode number handling.
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- Recognize Samba version beginning with Samba 3.0.28a using the new
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extended version information negotiated with the Samba developers.
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- List servers of all accessible domains and workgroups in // instead of
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just the servers in the own domain/workgroup.
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- Support Linux-like extended attributes ([fl]getxattr, [fl]listxattr,
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[fl]setxattr, [fl]removexattr).
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- New file conversion API for conversion from Win32 to POSIX path and
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vice versa (cygwin_conv_path, cygwin_create_path, cygwin_conv_path_list).
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- New openat family of functions: openat, faccessat, fchmodat, fchownat,
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fstatat, futimesat, linkat, mkdirat, mkfifoat, mknodat, readlinkat, renameat,
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symlinkat, unlinkat.
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- Other new APIs: posix_fadvise, posix_fallocate, funopen, fopencookie,
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open_memstream, open_wmemstream, fmemopen, fdopendir.
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</screen>
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</sect2>
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<sect2 id="ov-new1.7-net"><title>Network related changes</title>
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<screen>
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- New implementation for blocking sockets and select on sockets which
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is supposed to allow POSIX-compatible sharing of sockets between
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threads and processes.
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- send/sendto/sendmsg now send data in 64K chunks to circumvent an
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internal buffer problem in WinSock (KB 201213).
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- New send/recv option MSG_DONTWAIT.
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- IPv6 support. New API getaddrinfo, getnameinfo, freeaddrinfo,
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gai_strerror, in6addr_any, in6addr_loopback. On IPv6-less systems,
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replacement functions are available for IPv4. On systems with IPv6
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enabled, the underlying WinSock functions are used. While I tried
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hard to get the functionality as POSIXy as possible, keep in mind that
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a *fully* conformant implementation of getaddrinfo and other stuff is
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only available starting with Windows Vista/2008.
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- Resolver functions (res_init, res_query, res_search, res_querydomain,
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res_mkquery, res_send, dn_comp, dn_expand) are now part of Cygwin.
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Applications don't have to link against minires anymore. Actually,
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this *is* the former libminires.a.
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- rcmd is now implemented inside of Cygwin, instead of calling the
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WinSock function. This allows rsh(1) usage on Vista/2008, which
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dropped this function from WinSock.
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- Define multicast structures in netinet/in.h. Note that fully
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conformant multicast support is only available beginning with Vista/2008.
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- Improve get_ifconf. Redefine struct ifreq and subsequent datastructures
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to be able to keep more information. Support SIOCGIFINDEX, SIOCGIFDSTADDR
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and the Cygwin specific SIOCGIFFRNDLYNAM. Support real interface flags
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on systems supporting them.
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- Other new APIs: bindresvport, bindresvport_sa, gethostbyname2, iruserok_sa,
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rcmd_af, rresvport_af. getifaddrs, freeifaddrs, if_nametoindex,
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if_indextoname, if_nameindex, if_freenameindex.
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- Add /proc/net/if_inet6.
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</screen>
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</sect2>
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<sect2 id="ov-new1.7-device"><title>Device related changes</title>
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<screen>
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- Reworked pipe implementation which uses overlapped IO to create
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more reliable interruptible pipes and fifos.
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- The CYGWIN environment variable option "binmode" has been removed.
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- Improved fifo handling by using native Windows named pipes.
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- Detect when a stdin/stdout which looks like a pipe is really a tty.
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Among other things, this allows a debugged application to recognize that
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it is using the same tty as the debugger.
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- Support UTF-8 in console window.
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- In the console window the backspace key now emits DEL (0x7f) instead
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of BS (0x08), Alt-Backspace emits ESC-DEL (0x1b,0x7f) instead of DEL
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(0x7f), same as the Linux console and xterm.
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Control-Space now emits an ASCII NUL (0x0) character.
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- Support up to 64 serial interfaces using /dev/ttyS0 - /dev/ttyS63.
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- Support up to 128 raw disk drives /dev/sda - /dev/sddx.
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- New API: cfmakeraw, posix_openpt.
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</screen>
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</sect2>
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<sect2 id="ov-new1.7-posix"><title>Other POSIX related changes</title>
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<screen>
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- A lot of character sets are supported now via a call to setlocale().
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The setting of the environment variables $LANG, $LC_ALL or $LC_CTYPE will
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be used. For instance, setting $LANG to "de_DE.ISO-8859-15" before
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starting a Cygwin session will use the ISO-8859-15 character set in
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the entire session. UTF-8 is supported as well, as in "en_US.UTF-8".
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The full list of supported character sets: "ASCII", "ISO-8859-x" with x
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in 1-16, except 12, "UTF-8", Windows codepages "CPxxx", with xxx in
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(437, 720, 737, 775, 850, 852, 855, 857, 858, 862, 866, 874, 1125,
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1250, 1251, 1252, 1253, 1254, 1255, 1256, 1257, 1258), "SJIS",
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"GBK", "eucJP", "eucKR", and "Big5". The leading language and territory
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part (en_US, for instance) is not used by Cygwin yet, but is required
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for POSIX compatibility.
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- Allow multiple concurrent read locks per thread for pthread_rwlock_t.
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- Implement pthread_kill(thread, 0) as per POSIX.
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- New API for POSIX IPC:
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Named semaphores: sem_open, sem_close, sem_unlink.
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Message queues: mq_open, mq_getattr, mq_setattr, mq_notify, mq_send,
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mq_timedsend, mq_receive, mq_timedreceive, mq_close, mq_unlink.
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Shared memory: shm_open, shm_unlink.
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- Only declare expected functions in <strings.h>, don't include
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<string.h> from here.
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- New APIs: _Exit, confstr, insque, remque, sys_sigabbrev,
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posix_madvise, posix_memalign, reallocf,
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exp10, exp10f, pow10, pow10f, lrint, lrintf, rint, rintf, llrint, llrintf,
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llrintl, lrintl, rintl,
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mbsnrtowcs, strcasestr, stpcpy, stpncpy, wcpcpy, wcpncpy, wcsnlen,
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wcsnrtombs, wcsftime, wcstod, wcstof, wcstoimax, wcstok, wcstol, wcstoll,
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wcstoul, wcstoull, wcstoumax, wcsxfrm, wcscasecmp, wcsncasecmp,
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fgetwc, fgetws, fputwc, fputws, fwide, getwc, getwchar, putwc, putwchar,
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ungetwc, asnprintf, dprintf, vasnprintf, vdprintf,
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wprintf, fwprintf, swprintf, vwprintf, vfwprintf, vswprintf,
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wscanf, fwscanf, swscanf, vwscanf, vfwscanf, vswscanf.
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</screen>
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</sect2>
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<sect2 id="ov-new1.7-sec"><title>Security related changes</title>
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<screen>
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- Getting a domain user's groups is hopefully more bulletproof now.
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- Cygwin now comes with a real LSA authentication package. This must
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be manually installed by a privileged user using the /bin/cyglsa-config
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script. The advantages and disadvantages are noted in
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http://cygwin.com/ml/cygwin-developers/2006-11/msg00000.html
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- Cygwin now allows storage and use of user passwords in a hidden area of
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the registry. This is tried first when Cygwin is called by privileged
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processes to switch the user context. This allows, for instance,
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ssh public key sessions with full network credentials to access shares
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on other machines.
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- New options have been added to the mkpasswd and mkgroup tools to
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ease use in multi-machine and multi-domain environments. The existing
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options have a slightly changed behaviour.
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</screen>
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</sect2>
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<sect2 id="ov-new1.7-misc"><title>Miscellaneous</title>
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<screen>
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- New ldd utility, similar to Linux.
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- New link libraries libdl.a, libresolve.a, librt.a.
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- Fallout from the long path names: If the current working directory is
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longer than 260 bytes, or if the current working directory is a virtual
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path (like /proc, /cygdrive, //server), don't call native Win32 programs
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since they don't understand these paths.
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- On the first usage of a DOS path (C:\foo, \\foo\bar), the Cygwin DLL
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emits a scary warning that DOS paths shouldn't be used. This warning
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may be disabled via the new CYGWIN=nodosfilewarning setting.
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- The CYGWIN environment variable option "server" has been removed.
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Cygwin automatically uses cygserver if it's available.
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- Allow environment of arbitrary size instead of a maximum of 32K.
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- Don't force uppercase environment when started from a non-Cygwin process.
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Except for certain Windows and POSIX variables which are always uppercased,
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preserve environment case. Switch back to old behaviour with the new
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CYGWIN=upcaseenv setting.
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- Detect and report a missing DLL on process startup.
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- Add /proc/registry32 and /proc/registry64 paths to access 32 bit and
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64 bit registry on 64 bit systems.
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- Add the ability to distinguish registry keys and registry values with the
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same name in the same registry subtree. The key is called "foo" and the
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value will be called "foo%val" in this case.
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- Align /proc/cpuinfo more closly to Linux content.
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- Add /proc/$PID/mounts entries and a symlink /proc/mounts pointing to
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/proc/self/mounts as on Linux.
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- Optimized strstr and memmem implementation.
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- Remove backwards compatibility with old signal masks. (Some *very* old
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programs which use signal masks may no longer work correctly).
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</screen>
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</sect2>
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</sect1>
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