View source for NextBSD

{{short description|Operating system}}
{{Multiple issues|
{{Notability|date=December 2015}}
{{One source|date=December 2015}}
{{Technical|Article|date=December 2015}}
}}
{{Infobox OS
| name = NextBSD
| logo = NextBSD logo.png
| screenshot =
| caption =
| developer = Jordan Hubbard, Kip Macy
| source_model = Open source
| kernel_type = [[Monolithic Kernel|Monolithic]]
| userland = NextBSD
| supported_platforms = [[Intel 80386]]
| ui = [[Command-line interface]]
| family = [[Unix]]
| released = {{Start date and age|2015}}
| latest_release_version = Beta
| latest_release_date = {{Start date and age|2015}}
| latest_test_version = Beta
| latest_test_date = Abandoned 2019
| repo = https://github.com/NextBSD/NextBSD
| marketing_target =
| programmed_in = [[C (programming language)|C]]
| prog_language =
| language = English
| updatemodel =
| package_manager =
| working_state = Abandoned as of 2019, no visible changes since 2016.
| license = [[BSD licenses]]
| website = {{URL|https://web.archive.org/web/20161215232355/http://nextbsd.org/}}
}}
'''NextBSD''' was an [[operating system]] initially based on the [[Trunk (software)|trunk]] version of [[FreeBSD]] as of August 2015. It was a [[Fork (software development)|fork]] of FreeBSD which implemented new features developed on [[Branching (version control)|branches]], but not yet implemented in FreeBSD. As of 2019, the website is defunct, with the last commits on GitHub dating to October 2019. The Wayback Machine captures of the website after December 15, 2017 are domain squatter pages, and as of March 17, 2021, the site is redirects to a fake "Apple Support" page.
==Features==
The basic features of ''[[launchd]]'', ''notifyd'', ''asld'', and ''libdispatch'' work.
These can be installed by [[Disk cloning|cloning]] the NextBSD [[Software repository|repository]] from [[GitHub]], building GENERIC or MACHTEST [[Kernel (operating system)|kernels]], installing a new world on an existing 10.x or CURRENT system, and then following the instructions in the README.
''Launchd'' will start the initial jobs that are part of the repo now.
==Planned Features==
The project refers to an installer as the first planned milestone on their website.
Future plans included convert to rc and tying notifyd in to potential consumers.
==History==
NeXTBSD was announced by [[Jordan Hubbard]] and Kip Macy in August 2015 at the Bay Area FreeBSD Users Group (BAFUG).
==Relationship to FreeBSD==
NeXTBSD is based on the FreeBSD-CURRENT kernel while adding in Mach IPC, Libdispatch, notifyd, asld, launchd, and other components derived from [[Darwin (operating system)|Darwin]], Apple's open-source code for [[macOS]].
==Technology==
===Basic Architecture===
<!-- Deleted image removed: [[File:NextBSD basic architecture.png|thumb|right|NextBSD basic architecture]] -->
* FreeBSD-current kernel + Mach IPC
* Common Object Runtime (create/delete/retain/release)
* Libdispatch / ASL / Libnotify
* launchd
** launchctl
*** json config  files
** legacy rc system
** cooperating daemons
==Mach Kernel Abstractions==
{{Context|section|date=December 2015}}
===Tasks===
The units of resource ownership; each task consists of a virtual address space, a port right namespace, and one or more threads. (Implemented as an extension to a process.)
===Threads===
The units of CPU execution within a task. Simple extension to kthreads.
===Address space===
In conjunction with memory managers, Mach implements the notion of a sparse virtual address space and shared memory. (No modifications)
===Memory objects===
The internal units of memory management. Memory objects include named entries and regions; they are representations of potentially persistent data that may be mapped into address spaces. (Unsupported)
===Ports===
Secure, simplex communication channels, accessible only via send and receive capabilities (known as port rights).
===IPC===
Message queues, remote procedure calls, notifications, semaphores, and lock sets. (Mach semaphores and lock sets are not supported).
===Time===
Clocks, timers, and waiting - (rudimentary shims).
===Standards adherence===
Current BSD operating system variants support many of the common [[Institute of Electrical and Electronics Engineers|IEEE]], [[American National Standards Institute|ANSI]], [[International Organization for Standardization|ISO]], and [[POSIX]] standards, while retaining most of the traditional BSD behavior. Like [[AT&T Unix]], the BSD kernel is [[monolithic kernel|monolithic]], meaning that device drivers in the kernel run in [[privileged mode]], as part of the core of the operating system.
A selection of significant Unix versions and [[Unix-like]] operating systems that descend from BSD includes:
* [[FreeBSD]], an open source general purpose operating system.
** [[NeXT]] [[NEXTSTEP]] and [[OPENSTEP]], based on the [[Mach kernel]] and [[4BSD]]; the ancestor of [[macOS|Mac OS X]] (macOS)
*** [[Apple Inc.]]'s [[Darwin (operating system)|Darwin]], the core of [[macOS]] and [[iOS]]; built on the [[XNU|XNU kernel]] (part [[Mach (kernel)|Mach]], part FreeBSD, part Apple-derived code) and a [[Userland (computing)|userland]] much of which comes from FreeBSD{{citation needed|date=December 2015}}
==See also==
{{Portal|Free and open-source software}}
* [[FreeBSD]]
* [[macOS]]
* [[Darwin (operating system)|Darwin]]
* [[BSD Daemon]]
* [[BSD licenses]]
* [[Comparison of BSD operating systems]]
* [[List of BSD operating systems]]
==References==
* [https://web.archive.org/web/20161215232355/http://nextbsd.org/ NextBSD website - Archive.Org capture of 2016-12-15]
* [https://drive.google.com/file/d/0B1CTSkgkHoaccjJLM0NnWGRVdEE/view PDF Slide Presentation of the NextBSD basic architecture]
* [https://www.phoronix.com/scan.php?page=news_item&px=NeXTBSD-FreeBSD-X-Announced Article about NextBSD y by Michael Larabel in Phoronix magazine]
* [https://github.com/NextBSD/NextBSD NextBSD GitHub source repository]
==Bibliography==
* Marshall K. McKusick, Keith Bostic, Michael J. Karels, John S. Quartermain, ''The Design and Implementation of the 4.4BSD Operating System'' (Addison Wesley, 1996; {{ISBN|978-0-201-54979-9}})
* Marshall K. McKusick, George V. Neville-Neil, ''The Design and Implementation of the FreeBSD Operating System'' (Addison Wesley, August 2, 2004; {{ISBN|978-0-201-70245-3}})
* Samuel J. Leffler, Marshall K. McKusick, Michael J. Karels, [[John Quarterman|John S. Quarterman]], ''The Design and Implementation of the 4.3BSD UNIX Operating System'' (Addison Wesley, November 1989; {{ISBN|978-0-201-06196-3}})
* {{cite encyclopedia |editor1-first=Chris |editor1-last=DiBona |editor2-first=Sam |editor2-last=Ockman |editor3-first=Mark |editor3-last=Stone |encyclopedia=Open Sources: Voices from the Revolution |publisher=O'Reilly |year=1999 |isbn=978-1-56592-582-3 |first=Marshall Kirk |last=McKusick |authorlink=Marshall Kirk McKusick |url=https://archive.org/details/isbn_9781565925823 |title=Twenty Years of Berkeley Unix – From AT&T-Owned to Freely Redistributable |url-access=registration }}
* [[Peter H. Salus]], ''The Daemon, the GNU & The Penguin'' (Reed Media Services, September 1, 2008; {{ISBN|978-0-9790342-3-7}})
* [[Peter H. Salus]], ''A Quarter Century of UNIX'' (Addison Wesley, June 1, 1994; {{ISBN|978-0-201-54777-1}})
* [[Peter H. Salus]], ''Casting the Net'' (Addison-Wesley, March 1995; {{ISBN|978-0-201-87674-1}})
==External links==
* [https://github.com/freebsd/freebsd FreeBSD GitHub source repository]
* [http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree?view=co A timeline of BSD and Research UNIX]
* [http://www.levenez.com/unix/ UNIX History] – History of UNIX and BSD using diagrams
* [http://www.freebsd.org/doc/en_US.ISO8859-1/books/design-44bsd/ The Design and Implementation of the 4.4BSD Operating System]
* [http://minnie.tuhs.org/cgi-bin/utree.pl The Unix Tree:  Source code and manuals for old versions of Unix]
* [http://EuroBSDCon.org/ EuroBSDCon], an annual event in Europe in September, October or November, [http://www.ukuug.org/events/eurobsdcon2009/history/ founded] in 2001 <!-- 2003 did not happen, so, this one has not been "held annually", as per http://www.ukuug.org/events/eurobsdcon2009/history/ -->
* [http://BSDCan.org/ BSDCan], a conference in [[Ottawa]], Ontario, Canada, held annually in May since 2004, in June since 2015
* [http://AsiaBSDCon.org/ AsiaBSDCon], a conference in Tokyo, held annually in March of each year, since 2007
* [http://mdoc.su/ mdoc.su — short manual page URLs for FreeBSD, OpenBSD, NetBSD and DragonFly BSD], a web-service [http://nginx.conf.mdoc.su/mdoc.su.nginx.conf written] in [[nginx]]
* [http://BXR.SU/ BXR.SU — Super User's BSD Cross Reference], a userland and kernel source code search engine based on [[OpenGrok]] and [[nginx]]
[[Category:FreeBSD]]
[[Category:Berkeley Software Distribution]]