At the bottom of the COPYING file in libXfont, it says the following: "Copyright (c) 1999 The XFree86 Project Inc.
All Rights Reserved. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of The XFree86 Project Inc. shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from The XFree86 Project Inc.." The license doesn't give any explicit permission to use, modify, etc. However, I can't find any file with that license in libXfont, so it might be outdated. Above that is another unclear statement: "/* lib/font/fontfile/gunzip.c written by Mark Eichin <eic...@kitten.gen.ma.us> September 1996. intended for inclusion in X11 public releases. */" That is included in src/fontfile/gunzip.c. xproto has the same unclear license as the first one, but actually does have it in one of it's files, Xdefs.h.
