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Christian Franke 6adfb1fc28 Cygwin: nice: align return value and errno with POSIX and Linux
Return new nice value instead of 0 on success.
Set errno to EPERM instead of EACCES on failure.

Signed-off-by: Christian Franke <christian.franke@t-online.de>
2024-11-28 21:58:50 +01:00

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What's new:
-----------
- New API call: getlocalename_l.
- New API calls: fdclosedir, posix_getdents.
- New API call: setproctitle.
- New API call: timespec_get.
- 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.
What changed:
-------------
- ps -f now prints the commandline rather than the full path to the
executable.
- Drop support for NT4 and Samba < 3.0.22.
- 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 //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 to
missing administrator privileges.
- nice(2) now returns the new nice value instead of 0 on success
and sets errno to EPERM instead of EACCES on failure. This confirms
to POSIX and Linux (glibc >= 2.2.4) behavior.