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124 lines
5.2 KiB
Plaintext
124 lines
5.2 KiB
Plaintext
What's new:
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-----------
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- New API call: getlocalename_l.
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- New API calls: fdclosedir, posix_getdents.
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- New API call: setproctitle.
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- New API call: timespec_get.
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- New API calls: tcgetwinsize, tcsetwinsize.
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- New POSIX-defined entry points posix_spawn_file_actions_addchdir and
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posix_spawn_file_actions_addfchdir. These are the same as the already
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exported posix_spawn_file_actions_addchdir_np and
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posix_spawn_file_actions_addfchdir_np.
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- Add FS_IOC_[GS]ETFLAGS FS_PINNED_FL and FS_UNPINNED_FL flags to handle
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Windows attributes FILE_ATTRIBUTE_PINNED and FILE_ATTRIBUTE_UNPINNED.
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Add matching 'p' and 'u' mode bits in chattr(1) and lsattr(1).
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- New libaio.a provided for projects checking for POSIX aio support
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by looking for this library at configure time.
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- cygpath -r option allows to generate all Windows paths with root-local
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path prefix \\?\.
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What changed:
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-------------
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- ps -f now prints the commandline rather than the full path to the
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executable.
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- Drop support for NT4 and Samba < 3.0.22.
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- Now that SMBv1 is ultimately deprecated and not installed by default
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on latest Windows versions, use Network Discovery (i. e. WSD, "Web
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Service Discovery") for enumerating network servers in //, just like
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Windows Explorer.
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- If "server" is given as FQDN, and if "server" is an NFS server,
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ls //server now also enumerates NFS shares. If "server" is given
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as a flat name, only SMB shares are enumerated.
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- Expose WebDav shares, //tsclient (Microsoft Terminal Services)
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shares as well as //wsl$ (Plan 9 Network Provider) shares, i. e.,
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WSL installation root dirs.
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- Redesign pipe handling to minimize toggling blocking mode.
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The query_hdl stuff is no longer needed in new implementation.
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- Now using AVX/AVX2/AVX-512 instructions in signal handler does not
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break their context.
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- nice(2), setpriority(2) and sched_setparam(2) now fail with EACCES
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or EPERM if Windows would silently set a lower priority
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(HIGH_PRIORITY_CLASS instead of REALTIME_PRIORITY_CLASS) due to
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missing administrator privileges.
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- nice(2) now returns the new nice value instead of 0 on success
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and sets errno to EPERM instead of EACCES on failure. This confirms
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to POSIX and Linux (glibc >= 2.2.4) behavior.
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- sched_setscheduler(2) now emulates changes between SCHED_OTHER,
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SCHED_BATCH, SCHED_IDLE, SCHED_FIFO and SCHED_RR. If SCHED_OTHER or
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SCHED_BATCH is selected, the Windows priority is set according to the
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nice value where SCHED_BATCH sets a one step lower priority. If
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SCHED_IDLE is selected, the nice value is preserved and the Windows
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priority is set to IDLE_PRIORITY_CLASS. If SCHED_FIFO or SCHED_RR is
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selected, the nice value is preserved and the Windows priority is set
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according to the realtime priority.
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If the SCHED_RESET_ON_FORK flag is set, SCHED_FIFO and SCHED_RR are
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reset to SCHED_OTHER and negative nice values are reset to zero in
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each child process created with fork(2).
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Note: Windows does not offer alternative scheduling policies so
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this could only emulate API behavior.
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- If SCHED_FIFO or SCHED_RR is selected, the /proc/<PID>/stat field
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'(18) priority' is now set to the negated sched_policy minus one.
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If SCHED_IDLE is selected, this field is set to 39. The '(19) nice'
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field is now set to the originally requested nice value.
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- Raise maximum pid from 65536 to 4194304 to account for scenarios
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with lots of CPUs and lots of tasks.
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Addresses: https://cygwin.com/pipermail/cygwin/2024-December/256927.html
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- Allow mmap with MAP_FIXED to succeed on an address range contained
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in the chunk of an existing anonymous mapping, provided the
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MAP_SHARED/MAP_PRIVATE flags agree and MAP_NORESERVE is not set for
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either mapping.
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Addresses: https://cygwin.com/pipermail/cygwin/2024-December/256901.html
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- Fix a long-standing hang issue when running on ARM64 under emulation.
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This was due to a thread being terminated while the emulation was
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holding an internal lock.
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Addresses: https://cygwin.com/pipermail/cygwin-developers/2024-May/012694.html
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- Add a host machine tag to uname(2)'s sysname field. This echoes what
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used to be done with -WOW64 (when that was supported), but now with
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-ARM64 when running on an ARM64 host under emulation. The Cygwin DLL's
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own architecture continues to be reported in the machine field.
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- Escape special characters in /proc/<PID>/mount*. This allows the
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contents to be parsed consistently, and matches what is done on Linux.
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Addresses: https://cygwin.com/pipermail/cygwin/2024-June/256082.html
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- Expose all Windows volume mount points via getmntent(3). This also
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exposes them via /proc/<PID>/mount*. A change in behavior from
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previous Cygwin versions is that volumes whose root is mounted
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explicitly in Cygwin will now also show up as mounted under the
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cygdrive prefix, whereas before that entry would have been suppressed.
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Addresses: https://cygwin.com/pipermail/cygwin/2024-June/256081.html
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Fixes:
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------
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- Fix an off-by-one bug in lseek(2)'s SEEK_DATA/SEEK_HOLE handling on
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filesystem-compressed files, potentially triggering a hang in cp(1).
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Addresses: https://sourceware.org/pipermail/cygwin/2025-January/257082.html
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https://cygwin.com/pipermail/cygwin/2025-February/257326.html
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