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1 | # systemd Project Licensing |
2 | ||
3 | ## Main License | |
4 | ||
87bd3950 | 5 | The systemd project uses single-line references to Unique License Identifiers as |
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6 | defined by the Linux Foundation's SPDX project (https://spdx.org/). The line in |
7 | each individual source file identifies the license applicable to that file. | |
8 | ||
9 | The current set of valid, predefined SPDX identifiers can be found on the SPDX | |
10 | License List at https://spdx.org/licenses/. | |
11 | ||
12 | The 'LICENSES/' directory contains all the licenses used by the sources included in | |
13 | the systemd project source tree. | |
14 | ||
15 | Unless otherwise noted, the systemd project sources are licensed under the terms | |
16 | and conditions of the **GNU Lesser General Public License v2.1 or later**. | |
17 | ||
18 | New sources that cannot be distributed under LGPL-2.1-or-later will no longer | |
19 | be accepted for inclusion in the systemd project to maintain license uniformity. | |
20 | ||
21 | ## Other Licenses | |
22 | ||
23 | The following exceptions apply: | |
24 | ||
25 | * some udev sources under src/udev/ are licensed under **GPL-2.0-or-later**, so the | |
26 | udev binaries as a whole are also distributed under **GPL-2.0-or-later**. | |
27 | * the header files contained in src/basic/linux/ and src/shared/linux/ are copied | |
28 | verbatim from the Linux kernel source tree and are licensed under **GPL-2.0 WITH | |
29 | Linux-syscall-note** and are used within the scope of the Linux-syscall-note | |
30 | exception provisions | |
31 | * the src/shared/initreq.h header is licensed under original license, | |
32 | **LGPL-2.0-or-later**. | |
33 | * the src/shared/linux/bpf_insn.h header is copied from the Linux kernel | |
34 | source tree and is licensed under either **BSD-2-Clause** or **GPL-2.0-only**, | |
35 | and thus is included in the systemd build under the BSD-2-Clause license. | |
36 | * The src/basic/linux/wireguard.h header is copied from the Linux kernel | |
37 | source tree and is licensed under either **MIT** or **GPL-2.0 WITH Linux-syscall-note**, | |
38 | and thus is included in the systemd build under the MIT license. | |
39 | * the following sources are licensed under the **MIT** license (in case of our | |
40 | scripts, to facilitate copying and reuse of those helpers to other projects): | |
41 | - hwdb.d/parse_hwdb.py | |
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42 | - src/basic/linux/batman_adv.h |
43 | - src/basic/sparse-endian.h | |
44 | - tools/catalog-report.py | |
45 | * the following sources are licensed under the **CC0-1.0** license: | |
46 | - src/basic/siphash24.c | |
47 | - src/basic/siphash24.h | |
49ddb475 | 48 | * the following sources are licensed under the **MIT-0** license: |
1fe6d37e | 49 | - all examples under man/ |
58b415ae | 50 | - src/systemctl/systemd-sysv-install.SKELETON |
3fe96b6c | 51 | - config files and examples under /network |
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52 | * the following sources are under **Public Domain** (LicenseRef-murmurhash2-public-domain): |
53 | - src/basic/MurmurHash2.c | |
54 | - src/basic/MurmurHash2.h | |
55 | * the following sources are under **Public Domain** (LicenseRef-lookup3-public-domain): | |
56 | - src/libsystemd/sd-journal/lookup3.c | |
57 | - src/libsystemd/sd-journal/lookup3.h | |
58 | * the tools/chromiumos/gen_autosuspend_rules.py script is licensed under the | |
59 | **BSD-3-Clause** license. | |
2b913789 | 60 | * Heebo fonts under docs/fonts/ are licensed under the **SIL Open Font License 1.1**, |
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61 | * any files under test/ without an explicit license we assume non-copyrightable |
62 | (eg: computer-generated fuzzer data) | |
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63 | |
64 | ## OpenSSL Notes | |
65 | ||
66 | Note that building the systemd project with OpenSSL does not affect the libsystemd.so | |
67 | shared library, which is not linked with the OpenSSL library. |