50 lines
2.5 KiB
Plaintext
50 lines
2.5 KiB
Plaintext
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Copyright © 2021 Plan 9 Foundation
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Portions Copyright © 2001-2008 Russ Cox
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Portions Copyright © 2008-2009 Google Inc.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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===================================================================
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This software is derived from Plan 9, originally copyright Lucent Technologies
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and distributed under the Lucent Public License, Version 1.02.
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Lucent was bought by Alcatel, which was bought by Nokia.
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On March 23, 2021, Nokia announced the transfer of the Plan 9 copyrights to the
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Plan 9 Foundation, which in turn relicensed Plan 9 under the the MIT license,
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reproduced above.
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There are a few exceptions, noted with LICENSE files in their own directories:
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The bzip2 program uses the bzip2 license; see src/cmd/bzip2/LICENSE.
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The fonts from Bigelow and Holmes were licensed only for Plan 9 itself,
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not for derivatives like Plan 9 from User Space.
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Plan 9 from User Space arranged a separate agreement with B&H to include
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the bitmap fonts in the font/luc, font/lucm, font/lucsans, and font/pelm
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directories. Other bitmap fonts have other licenses. See font/LICENSE.
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The Lucida Sans Unicode PostScript fonts were licensed from B&H only for Plan 9
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itself, not derivatives like Plan 9 from User Space. In their place, Plan 9 from
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User Space provides Luxi Sans, also by B&H but available under a more liberal
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license, and Deja Vu, a Unicode extension of the Bitstream Vera family of fonts.
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Luxi Sans is similar to Lucida Sans, but it has no Unicode support.
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Deja Vu does have good Unicode support.
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