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- Copyright © 2021 Plan 9 Foundation
- Portions Copyright © 2001-2008 Russ Cox
- Portions Copyright © 2008-2009 Google Inc.
- Permission is hereby granted, free of charge, to any person obtaining
- a copy of this software and associated documentation files (the
- "Software"), to deal in the Software without restriction, including
- without limitation the rights to use, copy, modify, merge, publish,
- distribute, sublicense, and/or sell copies of the Software, and to
- permit persons to whom the Software is furnished to do so, subject to
- the following conditions:
- 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 AUTHORS OR COPYRIGHT HOLDERS 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.
- ===================================================================
- This software is derived from Plan 9, originally copyright Lucent Technologies
- and distributed under the Lucent Public License, Version 1.02.
- Lucent was bought by Alcatel, which was bought by Nokia.
- On March 23, 2021, Nokia announced the transfer of the Plan 9 copyrights to the
- Plan 9 Foundation, which in turn relicensed Plan 9 under the the MIT license,
- reproduced above.
- There are a few exceptions, noted with LICENSE files in their own directories:
- The bzip2 program uses the bzip2 license; see src/cmd/bzip2/LICENSE.
- The fonts from Bigelow and Holmes were licensed only for Plan 9 itself,
- not for derivatives like Plan 9 from User Space.
- Plan 9 from User Space arranged a separate agreement with B&H to include
- the bitmap fonts in the font/luc, font/lucm, font/lucsans, and font/pelm
- directories. Other bitmap fonts have other licenses. See font/LICENSE.
- The Lucida Sans Unicode PostScript fonts were licensed from B&H only for Plan 9
- itself, not derivatives like Plan 9 from User Space. In their place, Plan 9 from
- User Space provides Luxi Sans, also by B&H but available under a more liberal
- license, and Deja Vu, a Unicode extension of the Bitstream Vera family of fonts.
- Luxi Sans is similar to Lucida Sans, but it has no Unicode support.
- Deja Vu does have good Unicode support.
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