| Version | Change log |
| Cygwin 3.6.6 Feb 2, 2026 |
Fixes: Fix the problem that the destructor of dlopen()'ed DLL may be called after dlclose(). This fixes the crash on exiting SDL2. Fix the problem that the constructor of dlopen()'ed DLL may be called twice. Fix deadlock regarding atexit()'ed function, that waits for another thread which calls atexit(). Fix the problem that tmp_pathbuf area is destroyed regarding flock(). Improve newgrp(1) POSIX compatibility and its documentation. Fix ESC sequence parsing in pty_master_fwd_thread. Add a new workaround which prevent the screen from being garbled when cmd.exe is started using rlwrap in Win11. Fix a bug where app execution aliases no longer start correctly. Fix primary group override for non-domain users and users of a Microsoft account. Fix the deadlock between the parent and child processes, where both lock the same file and attempt to close it simultaneously. |
| Cygwin 3.6.5 Nov 6, 2025 |
Fixes: Fix two minor bugs in clock and POSIX timer handling. Fix an ordering problem in sys/termios.h. Fix doxygen hang due to a deadlock between fclose() and fork(). Fix multi-thread safety of system(). Revert fix handling of invalid 4 byte UTF-8 sequence. It was broken. Instead, fix internal conversion of filenames in case of an invalid 4 byte UTF-8 sequence. Make process_fd correctly handle pty and console. Fix Ctrl-O (FLUSHO) handling. Fix multi-thread safety of fork()/exec() by adding the same locking as was done for spawn. Fix native symlink to '.' (a regression in 3.6.4) |
| Cygwin 3.6.0 Mar 18, 2025 |
What's new: New API call: getlocalename_l. New API calls: fdclosedir, posix_getdents. New API call: setproctitle. New API call: timespec_get. New API calls: tcgetwinsize, tcsetwinsize. New API call: posix_close. New POSIX-defined entry points posix_spawn_file_actions_addchdir and posix_spawn_file_actions_addfchdir. These are the same as the already exported posix_spawn_file_actions_addchdir_np and posix_spawn_file_actions_addfchdir_np. Add FS_IOC_[GS]ETFLAGS FS_PINNED_FL and FS_UNPINNED_FL flags to handle Windows attributes FILE_ATTRIBUTE_PINNED and FILE_ATTRIBUTE_UNPINNED. Add matching 'p' and 'u' mode bits in chattr(1) and lsattr(1). New libaio.a provided for projects checking for POSIX aio support by looking for this library at configure time. Cygpath -r option allows to generate all Windows paths with root-local path prefix ?. What changed: Ps -f now prints the commandline rather than the full path to the executable. Drop workarounds for connecting with NT4 and Samba < 3.0.22 shares. Now that SMBv1 is ultimately deprecated and not installed by default on latest Windows versions, use Network Discovery (i. e. WSD, "Web Service Discovery") for enumerating network servers in //, just like Windows Explorer. If "server" is given as FQDN, and if "server" is an NFS server, ls //server now also enumerates NFS shares. If "server" is given as a flat name, only SMB shares are enumerated. Expose WebDav shares, //tsclient (Microsoft Terminal Services) shares as well as //wsl$ (Plan 9 Network Provider) shares, i. e., WSL installation root dirs. Redesign pipe handling to minimize toggling blocking mode. The query_hdl stuff is no longer needed in new implementation. Now using AVX/AVX2/AVX-512 instructions in signal handler does not break their context. Nice(2), setpriority(2) and sched_setparam(2) now fail with EACCES or EPERM if Windows would silently set a lower priority (HIGH_PRIORITY_CLASS instead of REALTIME_PRIORITY_CLASS) due t |
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