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diff --git a/winsup/doc/new-features.xml b/winsup/doc/new-features.xml new file mode 100644 index 000000000..09ae7ab1f --- /dev/null +++ b/winsup/doc/new-features.xml @@ -0,0 +1,1195 @@ +<?xml version="1.0" encoding='UTF-8'?> +<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook V4.5//EN" + "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> + +<sect1 id="ov-new1.7"><title>What's new and what changed in Cygwin 1.7</title> + +<sect2 id="ov-new1.7.19"><title>What's new and what changed from 1.7.18 to 1.7.19</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +Drop support for Windows 2000 and Windows XP pre-SP3. +</para></listitem> + +<listitem><para> +Add support for building a 64 bit version of Cygwin on x86_64 natively. +</para></listitem> + +<listitem><para> +Add support for creating native NTFS symlinks starting with Windows Vista +by setting the CYGWIN=winsymlinks:native option. +</para></listitem> + +<listitem><para> +Add support for AFS filesystem. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.18"><title>What's new and what changed from 1.7.17 to 1.7.18</title> + +<itemizedlist mark="bullet"> + +<listitem><para>Added Windows console cursor appearance support.</para> + + <itemizedlist mark="bullet"> + + <listitem><para> + Show/Hide Cursor mode (DECTCEM): "ESC[?25h" / "ESC[?25l" + </para></listitem> + + <listitem><para> + Set cursor style (DECSCUSR): "ESC[n q" (note the space before the q); + where n is 0, 1, 2 for block cursor, 3, 4 for underline cursor (all + disregarding blinking mode), or > 4 to set the cursor height to a + percentage of the cell height. + </para></listitem> + + </itemizedlist> + +</listitem> + +<listitem><para> +For performance reasons, Cygwin does not try to create sparse files +automatically anymore, unless you use the new "sparse" mount option. +</para></listitem> + +<listitem><para> +New API: cfsetspeed. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.17"><title>What's new and what changed from 1.7.16 to 1.7.17</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +Support the "e" flag to fopen(3). This is a Glibc extension which +allows to fopen the file with the O_CLOEXEC flag set. +</para></listitem> + +<listitem><para> +Support the "x" flag to fopen(3). This is a Glibc/C11 extension which +allows to open the file with the O_EXCL flag set. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.16"><title>What's new and what changed from 1.7.15 to 1.7.16</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +New API: getmntent_r, memrchr. +</para></listitem> + +<listitem><para> +Recognize ReFS filesystem. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.15"><title>What's new and what changed from 1.7.14 to 1.7.15</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +CYGWIN=pipe_byte option now forces the opening of pipes in byte mode rather than message mode. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.14"><title>What's new and what changed from 1.7.13 to 1.7.14</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +Add mouse reporting modes 1005, 1006 and 1015 to console window. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.13"><title>What's new and what changed from 1.7.12 to 1.7.13</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +mkpasswd and mkgroup now try to print an entry for the TrustedInstaller +account existing since Windows Vista/Server 2008. +</para></listitem> + +<listitem><para> +Terminal typeahead when switching from canonical to non-canonical mode +is now properly flushed. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.12"><title>What's new and what changed from 1.7.11 to 1.7.12</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +Cygwin now automatically populates the /dev directory with all existing +POSIX devices. +</para></listitem> + +<listitem><para> +Add virtual /proc/PID/mountinfo file. +</para></listitem> + +<listitem><para> +flock now additionally supports the following scenario, which requires + to propagate locks to the parent process: + <screen> + ( + flock -n 9 || exit 1 + # ... commands executed under lock ... + } 9>/var/lock/mylockfile + </screen> + Only propagation to the direct parent process is supported so far, + not to grand parents or sibling processes. +</para></listitem> + +<listitem><para> +Add a "detect_bloda" setting for the CYGWIN environment variable to help +finding potential BLODAs. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.11"><title>What's new and what changed from 1.7.10 to 1.7.11</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +New <command>pldd</command> command for listing DLLs loaded by a process. +</para></listitem> + +<listitem><para> +New API: scandirat. +</para></listitem> + +<listitem><para> +Change the way remote shares mapped to drive letters are recognized when +creating the cygdrive directory. If Windows claims the drive is +unavailable, don't show it in the cygdrive directory listing. +</para></listitem> + +<listitem><para> +Raise default stacksize of pthreads from 512K to 1 Meg. It can still be +changed using the pthread_attr_setstacksize call. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.10"><title>What's new and what changed from 1.7.9 to 1.7.10</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +Drop support for Windows NT4. +</para></listitem> + +<listitem><para> +The CYGWIN environment variable options "envcache", "strip_title", "title", +"tty", and "upcaseenv" have been removed. +</para></listitem> + +<listitem><para> +If the executable (and the system) is large address aware, the application heap +will be placed in the large memory area. The <command>peflags</command> tool +from the <literal>rebase</literal> package can be used to set the large +address awareness flag in the executable file header. +</para></listitem> + +<listitem><para> +The registry setting "heap_chunk_in_mb" has been removed, in favor of a new +per-executable setting in the executable file header which can be set using the +<command>peflags</command> tool. See <xref linkend="setup-maxmem"></xref> +for more information. +</para></listitem> + +<listitem><para> +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 <command>mintty</command>. +</para></listitem> + +<listitem><para> +New <command>getconf</command> command for querying confstr(3), pathconf(3), +sysconf(3), and limits.h configuration. +</para></listitem> + +<listitem><para> +New <command>tzset</command> utility to generate a POSIX-compatible TZ +environment variable from the Windows timezone settings. +</para></listitem> + +<listitem><para> +The passwd command now allows an administrator to use the -R command for +other user accounts: passwd -R username. +</para></listitem> + +<listitem><para> +Pthread spinlocks. New APIs: pthread_spin_destroy, pthread_spin_init, +pthread_spin_lock, pthread_spin_trylock, pthread_spin_unlock. +</para></listitem> + +<listitem><para> +Pthread stack address management. New APIs: pthread_attr_getstack, +pthread_attr_getstackaddr, pthread_attr_getguardsize, pthread_attr_setstack, +pthread_attr_setstackaddr, pthread_attr_setguardsize, pthread_getattr_np. +</para></listitem> + +<listitem><para> +POSIX Clock Selection option. New APIs: clock_nanosleep, +pthread_condattr_getclock, pthread_condattr_setclock. +</para></listitem> + +<listitem><para> +clock_gettime(3) and clock_getres(3) accept per-process and per-thread CPU-time +clocks, including CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID. +New APIs: clock_getcpuclockid, pthread_getcpuclockid. +</para></listitem> + +<listitem><para> +GNU/glibc error.h error reporting functions. New APIs: error, error_at_line. +New exports: error_message_count, error_one_per_line, error_print_progname. +Also, perror and strerror_r no longer clobber strerror storage. +</para></listitem> + +<listitem><para> +C99 <tgmath.h> type-generic macros. +</para></listitem> + +<listitem><para> +/proc/loadavg now shows the number of currently running processes and the +total number of processes. +</para></listitem> + +<listitem><para> +Added /proc/devices and /proc/misc, which lists supported device types and +their device numbers. +</para></listitem> + +<listitem><para> +Added /proc/swaps, which shows the location and size of Windows paging file(s). +</para></listitem> + +<listitem><para> +Added /proc/sysvipc/msg, /proc/sysvipc/sem, and /proc/sysvipc/shm which +provide information about System V IPC message queues, semaphores, and +shared memory. +</para></listitem> + +<listitem><para> +/proc/version now shows the username of whomever compiled the Cygwin DLL +as well as the version of GCC used when compiling. +</para></listitem> + +<listitem><para> +dlopen now supports the Glibc-specific RTLD_NODELETE and RTLD_NOOPEN flags. +</para></listitem> + +<listitem><para> +The printf(3) and wprintf(3) families of functions now handle the %m +conversion flag. +</para></listitem> + +<listitem><para> +Other new API: clock_settime, __fpurge, getgrouplist, get_current_dir_name, +getpt, ppoll, psiginfo, psignal, ptsname_r, sys_siglist, pthread_setschedprio, +pthread_sigqueue, sysinfo. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.9"><title>What's new and what changed from 1.7.8 to 1.7.9</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +New API: strchrnul. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.8"><title>What's new and what changed from 1.7.7 to 1.7.8</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +Drop support for Windows NT4 prior to Service Pack 4. +</para></listitem> + +<listitem><para> +Reinstantiate Cygwin's ability to delete an empty directory which is the +current working directory of the same or another process. Same for any +other empty directory which has been opened by the same or another process. +</para></listitem> + +<listitem><para> +Cygwin now ships the C standard library fenv.h header file, and implements the +related APIs (including GNU/glibc extensions): feclearexcept, fedisableexcept, +feenableexcept, fegetenv, fegetexcept, fegetexceptflag, fegetprec, fegetround, +feholdexcept, feraiseexcept, fesetenv, fesetexceptflag, fesetprec, fesetround, +fetestexcept, feupdateenv, and predefines both default and no-mask FP +environments. See the +<ulink url="http://www.gnu.org/software/libc/manual/html_node/Arithmetic.html"> +GNU C Library manual</ulink> for full details of this functionality. +</para></listitem> + +<listitem><para> +Support for the C99 complex functions, except for the "long double" +implementations. New APIs: cacos, cacosf, cacosh, cacoshf, carg, cargf, casin, +casinf, casinh, casinhf, catan, catanf, catanh, catanhf, ccos, ccosf, ccosh, +ccoshf, cexp, cexpf, cimag, cimagf, clog, clogf, conj, conjf, cpow, cpowf, +cproj, cprojf, creal, crealf, csin, csinf, csinh, csinhf, csqrt, csqrtf, ctan, +ctanf, ctanh, ctanhf. +</para></listitem> + +<listitem><para> +Fix the width of "CJK Ambiguous Width" characters to 1 for singlebyte charsets +and 2 for East Asian multibyte charsets. (For UTF-8, it remains dependent on +the specified language, and the "@cjknarrow" locale modifier can still be used +to force width 1.) +</para></listitem> + +<listitem><para> +The strerror_r interface now has two flavors; if _GNU_SOURCE is +defined, it retains the previous behavior of returning char * +(but the result is now guaranteed to be NUL-terminated); otherwise +it now obeys POSIX semantics of returning int. +</para></listitem> + +<listitem><para> +/proc/sys now allows unfiltered access to the native NT namespace. Access +restrictions still apply. Direct device access via /proc/sys is not yet +supported. File system access via block devices works. For instance +(note the trailing slash!) +<screen> +bash$ cd /proc/sys/Device/HarddiskVolumeShadowCopy1/ +</screen> +</para></listitem> + +<listitem><para> +Other new APIs: llround, llroundf, madvise, pthread_yield. +Export program_invocation_name, program_invocation_short_name. +Support TIOCGPGRP, TIOCSPGRP ioctls. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.7"><title>What's new and what changed from 1.7.6 to 1.7.7</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +Partially revert the 1.7.6 change to set the Win32 current working directory +(CWD) always to an invalid directory, since it breaks backward compatibility +too much. The Cygwin CWD and the Win32 CWD are now kept in sync again, unless +the Cygwin CWD is not usable as Win32 CWD. See the reworked +<xref linkend="pathnames-win32-api"></xref> for details. +</para></listitem> + +<listitem><para> +Make sure to follow the Microsoft security advisory concerning DLL hijacking. +See the <ulink url="http://www.microsoft.com/technet/security/advisory/2269637.mspx">Microsoft Security Advisory (2269637) "Insecure Library Loading Could Allow Remote Code Execution"</ulink> for details. +</para></listitem> + +<listitem><para> +Allow to link against -lbinmode instead of /lib/binmode.o. Same for +-ltextmode, -ltextreadmode and -lautomode. +See <xref linkend="textbin-devel"></xref> for details. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.6"><title>What's new and what changed from 1.7.5 to 1.7.6</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +Add new mount options "dos" and "ihash" to allow overriding Cygwin default +behaviour on broken filesystems not recognized by Cygwin. +</para></listitem> + +<listitem><para> +Add new mount option "bind" to allow remounting parts of the POSIX file +hirarchy somewhere else. +</para></listitem> + +<listitem><para> +Ttys and ptys are handled as securable objects using file-like permissions +and owner/group information. <command>chmod</command> and +<command>chown</command> now work on ttys/ptys. A new mechanism is used +to propagate pty handles safely to other processes, which does not require +to use Cygserver. +</para></listitem> + +<listitem><para> +Pass on coresize settings made with setrlimit(2). This allows shells to +disable creating stackdump files in child processes via +<screen>ulimit -c 0</screen> in bash or <screen>limit coredumpsize 0</screen> +in tcsh. +</para></listitem> + +<listitem><para> +Locale categories contain all localization strings additionally as wide-char +strings. locale(1) prints these values just as on Linux. nl_langinfo(3) +allows to fetch them. +</para></listitem> + +<listitem><para> +New interfaces mkostemp(3) and mkostemps(3) are added. +</para></listitem> + +<listitem><para> +New virtual file /proc/filesystems. +</para></listitem> + +<listitem><para> +clock_gettime(3) and clock_getres(3) accept CLOCK_MONOTONIC. +</para></listitem> + +<listitem><para> +DEPRECATED with 1.7.7: Cygwin handles the current working directory entirely +on its own. The Win32 current working directory is set to an invalid path to +be out of the way. [...] +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.5"><title>What's new and what changed from 1.7.3 to 1.7.5</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +Support for DEC Backarrow Key Mode escape sequences (ESC [ ? 67 h, ESC [ ? 67 l) +in Windows console. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.3"><title>What's new and what changed from 1.7.2 to 1.7.3</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +Support for GB2312/EUC-CN. These charsets are implemented as aliases to GBK. +GB2312 is now the default charset name for the locales zh_CN and zh_SG, just +as on Linux. +</para></listitem> + +<listitem><para> +Modification and access timestamps of devices reflect the current time. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7.2"><title>What's new and what changed from 1.7.1 to 1.7.2</title> + +<itemizedlist mark="bullet"> + +<listitem><para>Localization support has been much improved.</para> + + <itemizedlist mark="bullet"> + + <listitem><para> + Cygwin now handles locales using the underlying Windows locale + support. The locale must exist in Windows to be recognized. + Locale aliases from the file /usr/share/locale/locale.alias are also + allowed, as long as their replacement is supported by the underlying Windows. + </para></listitem> + + <listitem><para> + New tool "locale" to fetch locale information and default locales based on + the Windows default settings as well as lists of all supported locales + and character sets. + </para></listitem> + + <listitem><para> + Default charset for locales without explicit charset is now chosen + from a list of Linux-compatible charsets. + </para> + + <para> + For instance: en_US -> ISO-8859-1, ja_JP -> EUC-JP, zh_TW -> Big5. + </para></listitem> + + <listitem><para> + Added support for the charsets GEORGIAN-PS, PT154, and TIS-620. + </para></listitem> + + <listitem><para> + Support for the various locale modifiers to switch charsets as on Linux. + </para></listitem> + + <listitem><para> + Default charset in the "C" or "POSIX" locale has been changed back + from UTF-8 to ASCII, to avoid problems with applications + expecting a singlebyte charset in the "C"/"POSIX" locale. Still use + UTF-8 internally for filename conversion in this case. + </para></listitem> + + <listitem><para> + LC_COLLATE, LC_MONETARY, LC_NUMERIC, and LC_TIME localization is + enabled via Windows locale support. LC_MESSAGES is enabled via a big + table with localized strings. + </para></listitem> + + <listitem><para> + fnmatch(3), regcomp(3), regexec(3) calls are now multibyte-aware. + </para></listitem> + + <listitem><para> + printf(3), wprintf(3) families of functions now handle the grouping + flag, the apostrophe <literal>'</literal>, per POSIX-1.2008. The + integer portion of the result of a decimal conversion (%i, %d, %u, %f, + %F, %g, %G) will be formatted with thousands' grouping characters. + </para></listitem> + + <listitem><para> + strftime(3), wcsftime(3), and strptime(3) now handle the E and O format + modifiers to print/scan alternative date and time representations or to + use alternative digits in locales which support this. Additionally these + functions now also support the padding modifiers '0' and '+', as well as + a field width per POSIX-1.2008. + </para></listitem> + + <listitem><para> + New strfmon(3) call. + </para></listitem> + + </itemizedlist> + +</listitem> + +<listitem><para> +Support open(2) flags O_CLOEXEC and O_TTY_INIT flags. Support fcntl +flag F_DUPFD_CLOEXEC. Support socket flags SOCK_CLOEXEC and SOCK_NONBLOCK. +Add new Linux-compatible API calls accept4(2), dup3(2), and pipe2(2). +Support the signal SIGPWR. +</para></listitem> + +<listitem><para>Enhanced Windows console support.</para> + + <itemizedlist mark="bullet"> + + <listitem><para> + The console's backspace keycode can be changed using 'stty erase'. + </para></listitem> + + <listitem><para> + Function keys send distinguished escape sequences compatible with rxvt. + Keypad keys send distinguished escape sequences, xterm-style. + </para></listitem> + + <listitem><para> + Support of combining Alt and AltGr modifiers in console window + (compatible with xterm and mintty), so that e.g. Alt-@ sends ESC @ + also on keyboards where @ is mapped to an AltGr combination. + </para></listitem> + + <listitem><para> + Report mouse wheel scroll events in mouse reporting mode 1000 (note: + this doesn't seem to work on all systems, assumedly due to driver + interworking issues). + Add mouse reporting mode 1002 to report mouse drag movement. + Add mouse reporting mode 1003 to report any mouse movement. + Add focus event reporting (mode 1004), compatible with xterm and mintty. + </para></listitem> + + <listitem><para> + Add escape sequences for not bold (22), not invisible (28), not + blinking (25) (compatible with xterm and mintty). + </para></listitem> + + <listitem><para> + Support VT100 line drawing graphics mode in console window (compatible + with xterm and mintty). + </para></listitem> + + </itemizedlist> + +</listitem> + +<listitem><para> +Handle native DOS paths always as if mounted with "posix=0,noacl". +</para></listitem> + +<listitem><para> +Handle UNC paths starting with slashes identical to /cygdrive paths. +In other words, use the /cygdrive mount flags for these paths as well. +</para></listitem> + +<listitem><para> +Recognize NWFS filesystem and workaround broken OS call. +</para></listitem> + +<listitem><para> +New support for eXtensible Data Record (XDR) encoding and decoding, +as defined by RFCs 1014, 1832, and 4506. The XDR protocol and +functions are useful for cross-platfrom data exchange, and are +commonly used as the core data interchange format for Remote +Procedure Call (RPC) and NFS. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7-os"><title>OS related changes</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +Windows 95, 98 and Me are not supported anymore. The new Cygwin 1.7 DLL +will not run on any of these systems. +</para></listitem> + +<listitem><para> +Add support for Windows 7 and Windows Server 2008 R2. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7-file"><title>File Access related changes</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +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. +</para></listitem> + +<listitem><para> +Cygwin creates the mount points for /, /usr/bin, and /usr/lib +automatically from it's own position on the disk. They don't have to be +specified in /etc/fstab. +</para></listitem> + +<listitem><para> +If a filename cannot be represented in the current character set, the +character will be converted to a sequence Ctrl-X + UTF-8 representation +of the character. This allows to access all files, even those not +having a valid representation of their filename in the current character +set. To always have a valid string, use the UTF-8 charset by +setting the environment variable $LANG, $LC_ALL, or $LC_CTYPE to a valid +POSIX value, such as "en_US.UTF-8". +</para></listitem> + +<listitem><para> +PATH_MAX is now 4096. Internally, path names can be as long as the +underlying OS can handle (32K). +</para></listitem> + +<listitem><para> +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. +</para></listitem> + +<listitem><para> +The CYGWIN environment variable options "ntsec" and "smbntsec" have been +replaced by the per-mount option "acl"/"noacl". +</para></listitem> + +<listitem><para> +The CYGWIN environment variable option "ntea" has been removed without +substitute. +</para></listitem> + +<listitem><para> +The CYGWIN environment variable option "check_case" has been removed in +favor of real case-sensitivity on file systems supporting it. +</para></listitem> + +<listitem><para> +Creating filenames with special DOS characters '"', '*', ':', '<', +'>', '|' is supported. +</para></listitem> + +<listitem><para> +Creating files with special DOS device filename components ("aux", +"nul", "prn") is supported. +</para></listitem> + +<listitem><para> +File names 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 basis. +</para></listitem> + +<listitem><para> +Due to the above changes, managed mounts have been removed. +</para></listitem> + +<listitem><para> +Incoming DOS paths are always handled case-insensitive and get no POSIX +permission, as if they are mounted with noacl,posix=0 mount flags. +</para></listitem> + +<listitem><para> +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. +</para></listitem> + +<listitem><para> +rename(2) rewritten to be more POSIX conformant. +</para></listitem> + +<listitem><para> +access(2) now performs checks using the real user ID, as required by +POSIX; the old behavior of querying based on effective user ID is +available through the new faccessat(2) and euidaccess(2) APIs. +</para></listitem> + +<listitem><para> +Add st_birthtim member to struct stat. +</para></listitem> + +<listitem><para> +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. +</para></listitem> + +<listitem><para> +Implement atomic O_APPEND mode. +</para></listitem> + +<listitem><para> +New open(2) flags O_DIRECTORY, O_EXEC and O_SEARCH. +</para></listitem> + +<listitem><para> +Make the "plain file with SYSTEM attribute set" style symlink default +again when creating symlinks. Only create Windows shortcut style +symlinks if CYGWIN=winsymlinks is set in the environment. +</para></listitem> + +<listitem><para> +Symlinks now use UTF-16 encoding for the target filename for better +internationalization support. Cygwin 1.7 can read all old style +symlinks, but the new style is not compatible with older Cygwin +releases. +</para></listitem> + +<listitem><para> +Handle NTFS native symlinks available since Vista/2008 as symlinks (but +don't create Vista/2008 symlinks due to unfortunate OS restrictions). +</para></listitem> + +<listitem><para> +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). +</para></listitem> + +<listitem><para> +Recognize MVFS and workaround problems manipulating metadata and handling +DOS attributes. +</para></listitem> + +<listitem><para> +Recognize Netapp DataOnTap drives and fix inode number handling. +</para></listitem> + +<listitem><para> +Recognize Samba version beginning with Samba 3.0.28a using the new +extended version information negotiated with the Samba developers. +</para></listitem> + +<listitem><para> +Stop faking hardlinks by copying the file on filesystems which don't +support hardlinks natively (FAT, FAT32, etc.). Just return an error +instead, just like Linux. +</para></listitem> + +<listitem><para> +List servers of all accessible domains and workgroups in // instead of +just the servers in the own domain/workgroup. +</para></listitem> + +<listitem><para> +Support Linux-like extended attributes ([fl]getxattr, [fl]listxattr, +[fl]setxattr, [fl]removexattr). +</para></listitem> + +<listitem><para> +New file conversion API for conversion from Win32 to POSIX path and vice +versa (cygwin_conv_path, cygwin_create_path, cygwin_conv_path_list). +</para></listitem> + +<listitem><para> +New openat family of functions: openat, faccessat, fchmodat, fchownat, +fstatat, futimesat, linkat, mkdirat, mkfifoat, mknodat, readlinkat, +renameat, symlinkat, unlinkat. +</para></listitem> + +<listitem><para> +Other new APIs: posix_fadvise, posix_fallocate, funopen, fopencookie, +open_memstream, open_wmemstream, fmemopen, fdopendir, fpurge, mkstemps, +eaccess, euidaccess, canonicalize_file_name, fexecve, execvpe. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7-net"><title>Network related changes</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +New implementation for blocking sockets and select on sockets which is +supposed to allow POSIX-compatible sharing of sockets between threads +and processes. +</para></listitem> + +<listitem><para> +send/sendto/sendmsg now send data in 64K chunks to circumvent an +internal buffer problem in WinSock (KB 201213). +</para></listitem> + +<listitem><para> +New send/recv option MSG_DONTWAIT. +</para></listitem> + +<listitem><para> +IPv6 support. New APIs 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. +</para></listitem> + +<listitem><para> +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. +</para></listitem> + +<listitem><para> +rcmd is now implemented inside of Cygwin, instead of calling the WinSock +function. This allows rsh(1) usage on Vista/2008 and later, which +dropped this function from WinSock. +</para></listitem> + +<listitem><para> +Define multicast structures in netinet/in.h. Note that fully conformant +multicast support is only available beginning with Vista/2008. +</para></listitem> + +<listitem><para> +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. +</para></listitem> + +<listitem><para> +Other new APIs: bindresvport, bindresvport_sa, gethostbyname2, +iruserok_sa, rcmd_af, rresvport_af. getifaddrs, freeifaddrs, +if_nametoindex, if_indextoname, if_nameindex, if_freenameindex. +</para></listitem> + +<listitem><para> +Add /proc/net/if_inet6. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7-device"><title>Device related changes</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +Reworked pipe implementation which uses overlapped IO to create more +reliable interruptible pipes and fifos. +</para></listitem> + +<listitem><para> +The CYGWIN environment variable option "binmode" has been removed. +</para></listitem> + +<listitem><para> +Improved fifo handling by using native Windows named pipes. +</para></listitem> + +<listitem><para> +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. +</para></listitem> + +<listitem><para> +Support UTF-8 in console window. +</para></listitem> + +<listitem><para> +In the console window the backspace key now emits DEL (0x7f) instead of +BS (0x08), Alt-Backspace emits ESC-DEL (0x1b,0x7f) instead of DEL +(0x7f), same as the Linux console and xterm. Control-Space now emits an +ASCII NUL (0x0) character. +</para></listitem> + +<listitem><para> +Support up to 64 serial interfaces using /dev/ttyS0 - /dev/ttyS63. +</para></listitem> + +<listitem><para> +Support up to 128 raw disk drives /dev/sda - /dev/sddx. +</para></listitem> + +<listitem><para> +New API: cfmakeraw, get_avphys_pages, get_nprocs, get_nprocs_conf, +get_phys_pages, posix_openpt. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7-posix"><title>Other POSIX related changes</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +A lot of character sets are supported now via a call to setlocale(). +The setting of the environment variables $LANG, $LC_ALL or $LC_CTYPE +will be used. For instance, setting $LANG to "de_DE.ISO-8859-15" before +starting a Cygwin session will use the ISO-8859-15 character set in the +entire session. The default locale in the absence of one of the +aforementioned environment variables is "C.UTF-8". +</para> + +<para> +The full list of supported character sets: "ASCII", "ISO-8859-x" with x +in 1-16, except 12, "UTF-8", Windows codepages "CPxxx", with xxx in +(437, 720, 737, 775, 850, 852, 855, 857, 858, 862, 866, 874, 1125, 1250, +1251, 1252, 1253, 1254, 1255, 1256, 1257, 1258), "KOI8-R", "KOI8-U", +"SJIS", "GBK", "eucJP", "eucKR", and "Big5". +</para> + +</listitem> + +<listitem><para> +Allow multiple concurrent read locks per thread for pthread_rwlock_t. +</para></listitem> + +<listitem><para> +Implement pthread_kill(thread, 0) as per POSIX. +</para></listitem> + +<listitem><para> +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. +</para></listitem> + +<listitem><para> +Only declare expected functions in <strings.h>, don't include +<string.h> from here. +</para></listitem> + +<listitem><para> +Support for WCONTINUED, WIFCONTINUED() added to waitpid and wait4. +</para></listitem> + +<listitem><para> +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. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7-sec"><title>Security related changes</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +Getting a domain user's groups is hopefully more bulletproof now. +</para></listitem> + +<listitem><para> +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 +</para></listitem> + +<listitem><para> +Cygwin now allows storage and use of 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. +</para></listitem> + +<listitem><para> +New options have been added to the mkpasswd and mkgroup tools to ease +use in multi-machine and multi-domain environments. The existing +options have a slightly changed behaviour. +</para></listitem> + +</itemizedlist> + +</sect2> + +<sect2 id="ov-new1.7-misc"><title>Miscellaneous</title> + +<itemizedlist mark="bullet"> + +<listitem><para> +New ldd utility, similar to Linux. +</para></listitem> + +<listitem><para> +New link libraries libdl.a, libresolv.a, librt.a. +</para></listitem> + +<listitem><para> +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. +</para></listitem> + +<listitem><para> +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. This warning +may be disabled via the new CYGWIN=nodosfilewarning setting. +</para></listitem> + +<listitem><para> +The CYGWIN environment variable option "server" has been removed. +Cygwin automatically uses cygserver if it's available. +</para></listitem> + +<listitem><para> +Allow environment of arbitrary size instead of a maximum of 32K. +</para></listitem> + +<listitem><para> +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 CYGWIN=upcaseenv setting. +</para></listitem> + +<listitem><para> +Detect and report a missing DLL on process startup. +</para></listitem> + +<listitem><para> +Add /proc/registry32 and /proc/registry64 paths to access 32 bit and 64 +bit registry on 64 bit systems. +</para></listitem> + +<listitem><para> +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. +</para></listitem> + +<listitem><para> +Align /proc/cpuinfo more closly to Linux content. +</para></listitem> + +<listitem><para> +Add /proc/$PID/mounts entries and a symlink /proc/mounts pointing to +/proc/self/mounts as on Linux. +</para></listitem> + +<listitem><para> +Optimized strstr and memmem implementation. +</para></listitem> + +<listitem><para> +Remove backwards compatibility with old signal masks. (Some *very* old +programs which use signal masks may no longer work correctly). +</para></listitem> + +<listitem><para> +Cygwin now exports wrapper functions for libstdc++ operators new and +delete, to support the toolchain in implementing full C++ standards +conformance when working with shared libraries. +</para></listitem> + +<listitem><para> +Different Cygwin installations in different paths can be run in parallel +without knowing of each other. The path of the Cygwin DLL used in a +process is a key used when creating IPC objects. So different Cygwin +DLLs are running in different namespaces. +</para></listitem> + +<listitem><para> +Each Cygwin DLL stores its path and installation key in the registry. +This allows troubleshooting of problems which could be a result of +having multiple concurrent Cygwin installations. +</para></listitem> + +</itemizedlist> + +</sect2> + +</sect1> |