+2020-08-02 Paul Eggert <eggert@cs.ucla.edu>
+
+ fcntl: document some F_SETLK errno variations
+ * doc/posix-functions/fcntl.texi (fcntl): Document
+ OpenIndiana, GNU/Linux, FreeBSD on NFS files.
+
2020-08-02 Bruno Haible <bruno@clisp.org>
oset: Add an 'iterator_atleast' operation.
@code{F_GETFL}, @code{F_SETFL}, @code{F_GETOWN}, @code{F_SETOWN},
@code{F_GETLK}, @code{F_SETLK}, and @code{F_SETLKW} on some platforms:
mingw, MSVC 14.
+
+@item
+When a file does not support locking (such as on an NFS file system
+that does not support file locking), calls with @code{F_SETLK} and
+@code{F_SETLKW} fail with @code{errno} set to different values on
+different systems: @code{EINVAL} on OpenIndiana (as suggested by the
+POSIX 1003.1-2017 @code{fcntl} specification), @code{ENOLCK} on
+GNU/Linux, and @code{EOPNOTSUPP} on FreeBSD.
@end itemize