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Luca Boccassi 9d0ad242b8 man/glib-event-glue example: relicense to CC0-1.0 
All other examples were relicensed to CC0-1.0 since they are intended
to be copied and pasted anywhere without any restrictions.
Relicense the last one too.
2021-10-04 11:05:22 +02:00
..
BSD-2-Clause.txt Add all other applicable licenses under LICENSES/ 2021-10-01 17:27:34 +01:00
BSD-3-Clause.txt
CC0-1.0.txt Add all other applicable licenses under LICENSES/ 2021-10-01 17:27:34 +01:00
LGPL-2.0-or-later.txt Add all other applicable licenses under LICENSES/ 2021-10-01 17:27:34 +01:00
Linux-syscall-note.txt Add all other applicable licenses under LICENSES/ 2021-10-01 17:27:34 +01:00
lookup3-public-domain.txt Add all other applicable licenses under LICENSES/ 2021-10-01 17:27:34 +01:00
MIT.txt Add all other applicable licenses under LICENSES/ 2021-10-01 17:27:34 +01:00
murmurhash2-public-domain.txt Add all other applicable licenses under LICENSES/ 2021-10-01 17:27:34 +01:00
README.md man/glib-event-glue example: relicense to CC0-1.0 2021-10-04 11:05:22 +02:00

README.md

systemd Project Licensing

Main License

The systemd project uses single-line references to Unique Licese Identifiers as defined by the Linux Foundation's SPDX project (https://spdx.org/). The line in each individual source file identifies the license applicable to that file.

The current set of valid, predefined SPDX identifiers can be found on the SPDX License List at https://spdx.org/licenses/.

The 'LICENSES/' directory contains all the licenses used by the sources included in the systemd project source tree.

Unless otherwise noted, the systemd project sources are licensed under the terms and conditions of the GNU Lesser General Public License v2.1 or later.

New sources that cannot be distributed under LGPL-2.1-or-later will no longer be accepted for inclusion in the systemd project to maintain license uniformity.

Other Licenses

The following exceptions apply:

  • some udev sources under src/udev/ are licensed under GPL-2.0-or-later, so the udev binaries as a whole are also distributed under GPL-2.0-or-later.
  • the header files contained in src/basic/linux/ and src/shared/linux/ are copied verbatim from the Linux kernel source tree and are licensed under GPL-2.0 WITH Linux-syscall-note and are used within the scope of the Linux-syscall-note exception provisions
  • the src/shared/initreq.h header is licensed under original license, LGPL-2.0-or-later.
  • the src/shared/linux/bpf_insn.h header is copied from the Linux kernel source tree and is licensed under either BSD-2-Clause or GPL-2.0-only, and thus is included in the systemd build under the BSD-2-Clause license.
  • The src/basic/linux/wireguard.h header is copied from the Linux kernel source tree and is licensed under either MIT or GPL-2.0 WITH Linux-syscall-note, and thus is included in the systemd build under the MIT license.
  • the following sources are licensed under the MIT license (in case of our scripts, to facilitate copying and reuse of those helpers to other projects):
    • hwdb.d/parse_hwdb.py
    • src/basic/linux/batman_adv.h
    • src/basic/sparse-endian.h
    • tools/catalog-report.py
  • the following sources are licensed under the CC0-1.0 license:
    • src/basic/siphash24.c
    • src/basic/siphash24.h
    • src/systemctl/systemd-sysv-install.SKELETON
    • tools/check-includes.pl
    • all examples, code and scripts, under man/ except where otherwise noted
  • the following sources are under Public Domain (LicenseRef-murmurhash2-public-domain):
    • src/basic/MurmurHash2.c
    • src/basic/MurmurHash2.h
  • the following sources are under Public Domain (LicenseRef-lookup3-public-domain):
    • src/libsystemd/sd-journal/lookup3.c
    • src/libsystemd/sd-journal/lookup3.h
  • the tools/chromiumos/gen_autosuspend_rules.py script is licensed under the BSD-3-Clause license.
  • any files under test/ without an explicit license we assume non-copyrightable (eg: computer-generated fuzzer data)