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58 lines
3.3 KiB
HTML
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<html><head><title>Toybox License</title>
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<h2>Toybox is released under the Zero Clause BSD license (SPDX: <a href=https://spdx.org/licenses/0BSD.html>0BSD</a>):</h2>
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<blockquote>
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<p>Copyright (C) 2006 by Rob Landley <rob@landley.net>
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<p>Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted.</p>
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<p>THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</p>
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</blockquote>
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<p>The text of the above license is included in the file LICENSE in the source.</p>
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<h2>Why 0BSD?</h2>
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<p>Zero clause BSD is a <a href=https://en.wikipedia.org/wiki/Public_domain_equivalent_license>public domain equivalent</a> license.</p>
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<p>As with <a href=https://creativecommons.org/publicdomain/zero/1.0/>CC0</a>,
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<a href=http://unlicense.org>unlicense</a>, and <a href=http://wtfpl.net/>wtfpl</a>,
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the intent is to effectively place the licensed material into the public domain,
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which after decades of FUD (such as the time OSI's ex-lawyer compared
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<a href=https://web.archive.org/web/20160530090006/http://www.cod5.org/archive/>placing code into the public domain</a> to
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<a href=http://www.linuxjournal.com/article/6225>abandoning trash by the
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side of a highway</a>) is considered somehow unsafe. But if some random third
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party
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<a href=https://github.com/mkj/dropbear/blob/master/libtomcrypt/LICENSE>takes
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public domain code</a> and slaps <a href=http://www.opensource.apple.com/source/gnuzip/gnuzip-25/gzip/gzip.c>some other license on it</a>, then it's fine.</p>
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<p>To work around this perception, the above license is the
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<a href=https://www.openbsd.org/policy.html>OpenBSD suggested template
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license</a>, <a href=https://github.com/landley/toybox/commit/ee86b1d8e25cb0ca9d418b33eb0dc5e7716ddc1e>minus the half sentence</a>
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requiring the license text be copied verbatim into derived works. If 2BSD is
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ok, then 0BSD should be ok, despite being equivalent to placing code in the
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public domain.</p>
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<p>Modifying the license in this way avoids the hole android toolbox fell into where
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<a href=https://github.com/android/platform_system_core/blob/fd4c6b0a3a25921a9fe24691a695d715aecb6afe/toolbox/NOTICE>33 copies of BSD license text</a>
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were concatenated together when copyright dates changed, or the strange
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solution the busybox developers used to resolve tension between GPLv2's "no
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additional restrictions" and BSD's "you must include this large hunk of text"
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by sticking the two licenses at
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<a href=http://git.busybox.net/busybox/tree/networking/ping.c?id=887a1ad57fe978cd320be358effbe66df8a068bf>opposite ends of the file</a> and hoping nobody
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noticed.</a>
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<p>Note: I asked <a href=https://www.oreilly.com/openbook/opensources/book/kirkmck.html>Kirk McKusick</a> for permission to call this a BSD license at
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a conference shortly before I started using the name,
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and <a href=0bsd-mckusick.txt>again in 2018</a>.</p>
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