except that it sets an extended attribute on an open file referenced by
file descriptor
.Fa fd .
-.Sh NOTE
+.Sh NOTES
On some filesystems, such as
.Dv HFS+ ,
setting the extended attribute
.Dv com.apple.ResourceFork
will update the modification time (``mtime'') of
the file.
+.Pp
+Due to historical reasons, the
+.Dv XATTR_FINDERINFO_NAME
+(defined to be
+.Dq com.apple.FinderInfo )
+extended attribute must be 32 bytes; see the
+.Dv ATTR_CMN_FNDRINFO
+section in
+.Xr getattrlist 2 .
+.Pp
+The maximum supported size of extended attribute can be found out using
+.Xr pathconf 2
+with _PC_XATTR_SIZE_BITS option.
.Sh RETURN VALUES
On success, 0 is returned. On failure, -1 is returned and the global
variable
.Sh SEE ALSO
.Xr getxattr 2 ,
.Xr listxattr 2 ,
-.Xr removexattr 2
-.Sh NOTES
-Due to historical reasons, the
-.Dv XATTR_FINDERINFO_NAME
-(defined to be
-.Dq com.apple.FinderInfo )
-extended attribute must be 32 bytes; see the
-.Dv ATTR_CMN_FNDRINFO
-section in
-.Xr getattrlist 2 .
+.Xr removexattr 2 ,
+.Xr pathconf 2
.Sh HISTORY
.Fn setxattr
and