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Remove description of netns/

Pointed out by Kamil Rytarowski

.\" $NetBSD: src.7,v 1.10 2015/05/21 01:05:33 ozaki-r Exp $
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.\" Copyright (c) 2012, 2013 Mingzhe Wang and Elvira Khabirova.
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.Dd May 21, 2015
.Dt SRC 7
.Os
.Sh NAME
.Nm src
.Nd layout of NetBSD sources
.Sh DESCRIPTION
An outline of the
.Nx
source code hierarchy.
.Bl -tag -width "external/"
.It Pa bin/
Critical utilities for the system and users.
.It Pa sbin/
Critical utilities for the system and the superuser.
.It Pa usr.bin/
Not-so critical utilities for the system and users.
.It Pa usr.sbin/
Not-so critical utilities for the system and the superuser.
.It Pa common/
Sources shared between kernel and userland.
.Bl -tag -width "include/" -compact
.It Pa dist/
Utilities.
Every utility has its own subdirectory,
where its source and Makefile are located.
.It Pa include/
Include headers.
Every group of header files has its own
subdirectory, where it and its
Makefile are located.
.It Pa lib/
Libraries.
Every library has its own subdirectory,
where it and its Makefile are located.
.El
.It Pa compat/
A framework to (re)build the libraries
shipped with
.Nx
for different ABI than the default for
that platform.
.Bl -tag -width "compat/<arch1>/<arch2>/" -compact
.It Pa compat/<arch1>/<arch2>/
Every
.Pa compat/<arch1>/<arch2>/
directory contains a Makefile and a makefile
fragment for building an
.Pa <arch2>
compat libraries for
.Pa <arch1> .
E. g.,
.Pa compat/amd64/i386/
is where the 32-bit compat libraries for the
amd64 port are being built.
.It Pa compatsubdir.mk
The list of subdirectories (the libraries and
ld.elf_so) to build with this ABI.
.It Pa archdirs.mk
The list of subdirectories for each port.
.It Pa Makefile.compat
The basic framework to force the right paths for
library and ld.elf_so linkage.
.It Pa dirshack/Makefile
A hack to get objdirs created timely.
.El
.It Pa crypto/
Cryptographic source, which may have import or
export restrictions.
.Bl -tag -width "external/" -compact
.It Pa dist/
Original sources.
This is deprecated;
.Pa crypto/external/
should be used instead.
.It Pa external/
Original sources, grouped by license, and then
package per license.
.Pa crypto/external/<license>/<package>/dist/
contain original sources for given package;
other directories contain Makefiles and
given package's config files.
.El
.It Pa dist/
Unmodified sources from third parties.
This is deprecated;
.Pa external/
should be used instead.
.It Pa distrib/
Tools and data-files for making distributions.
.Bl -tag -width "distrib/notes/<arch>/" -compact
.It Pa <arch>/
Architecture-specific files, grouped by
image type.
E. g.,
.Pa distrib/<arch>/floppies/
contains Makefiles for making images for
various types of floppies;
.Pa <arch>/ramdisk/
contains makefiles for making ramdisks etc.
.It Pa cdrom/
Was used to create bootable CD images.
This is deprecated;
.Pa build.sh
\'s
.Pa iso-image
target should be used instead.
.It Pa common/
Common files for images generation.
.It Pa miniroot/
Files for miniroot.
.It Pa notes/<arch>
Architecture-specific parts of release notes.
.It Pa sets/
Scripts for making file sets.
.It Pa utils/
Utilities for installation ramdisk.
.El
.It Pa doc/
Development documentation files: changelogs,
build readmes etc.
.Pa doc/roadmaps/
contains roadmaps.
.It Pa etc/
Default configuration files to be put into
.Pa /etc .
.Bl -tag -width "compat/<arch1>/<arch2>/" -compact
.It Pa etc/etc.<arch>/
Architecture-specific config files.
.El
.It Pa external/
Unmodified sources from third parties,
grouped by license.
They are built with so-called "reachover"
Makefiles which can be found in
.Pa src/*bin/
hierarchies.
Every
.Pa external/<license>/<package>/
may contain:
.Bl -tag -width "usr.sbin/" -compact
.It Pa dist/
Unmodified third party source for a given package
.It Pa bin/
.It Pa usr.bin/
.It Pa usr.sbin/
.It etc.
Such subdirectories contain reachover Makefiles,
README's and various import helper scripts.
E. g.,
.Pa external/public-domain/
contains
sources licensed under Public Domain
license;
.Pa external/public-domain/sqlite/dist/
contains original sources;
.Pa external/public-domain/sqlite/bin/ ,
.Pa external/public-domain/sqlite/lib/
and
.Pa external/public-domain/sqlite/
itself contain reachover Makefiles.
.El
.It Pa extsrc/
Optional developer-provided sources that are built if
.Pa MKEXTSRC=yes ,
as a way to include extra components in the
build.
.It Pa games/
Sources for utilities/files in
.Pa /usr/games ;
each utility has its own subdirectory, where
its sources and Makefiles are located.
.It Pa gnu/
Sources licensed under GNU GPL.
This is deprecated;
.Pa external/gpl2/
or
.Pa external/gpl3/
should be used instead.
.Pa gnu/dists
contains the original GNU sources plus changes that
were submitted to maintainers and that are not
yet published.
Other folders contain files that are never expected
to be submitted to the FSF (reachover Makefiles, etc.)
.It Pa include/
Files to be put into
.Pa /usr/include .
.It Pa lib/
Source for libraries in
.Pa /usr/lib
and some scripts for them.
Every directory contains source for given library
and Makefiles.
.It Pa libexec/
Source for utilities in
.Pa /usr/libexec .
Every directory contains source for given utility
and Makefiles.
.It Pa regress/
Various regression tests in
.Pa /usr/tests .
This is deprecated; most tests are being migrated
into
.Pa tests/
once they are migrated to the
.Xr atf 7
test framework.
.It Pa rescue/
Makefiles for copying utilities to
.Pa /rescue .
.It Pa share/
Source for utilities/files in
.Pa /usr/share .
Every utility has its own subdirectory,
where its source and Makefile are located.
.It Pa sys/
Kernel source.
.Bl -tag -width "opencrypto/" -compact
.It Pa altq/
Network packet alternate queueing.
.It Pa arch/
Files to specific hardware platforms.
.It Pa coda/
Coda file system driver.
.It Pa compat/
Support for older version
.Nx
binaries and
.Pf non- Nx
binaries.
.It Pa conf/
Misc files for building kernel.
.It Pa crypto/
Crypt alogorithms used by IPsec.
.It Pa ddb/
Client code for local kernel debugger.
.It Pa dev/
Device drivers.
.It Pa dist/
Parent directory for the
.Ox
packet filter
.Xr pf 4 .
.It Pa external/
Sources from third parties, grouped by license.
.It Pa fs/
File systems storing data on physical drives.
.It Pa gdbscripts/
.Xr gdb 1
macros.
.It Pa ipkdb/
Client code for remote kernel debugger.
.It Pa kern/
.Nx Ap s
Kernel code, such as resource management, signal delivering, etc.
.It Pa lib/
Libraries used by the kernel.
.It Pa miscfs/
Drivers for file systems used to store layered data for kernel features.
.It Pa modules/
Kernel components, including hardware specific drivers and upper-level drivers.
.It Pa net/
Lowlevel network: protocol drivers, packet filters and access interfaces for NICs.
.It Pa net80211/
Drivers for 802.11 wireless network.
.It Pa netatalk/
Appletalk protocol stack
.Xr atalk 4 .
.It Pa netbt/
Bluetooth stack
.Xr bluetooth 4 .
.It Pa netinet/
IPv4 protocol stack
.Xr ip 4 .
.It Pa netinet6/
IPv6 protocol stack.
.It Pa netipsec/
IPsec protocol stack
.Xr ipsec 4 .
.It Pa netisdn/
ISDN protocol stack
.Xr isdn 4 .
.It Pa netkey/
Key management for IPsec.
.It Pa netmpls/
MPLS protocol stack
.Xr mpls 4 .
.It Pa netnatm/
Native Mode ATM protocol stack.
.It Pa netsmb/
SMB network protocol stack.
.It Pa nfs/
Network file system driver.
.It Pa opencrypto/
Cryptographic hardware framework
.Xr opencrypto 9 .
.It Pa rump/
Rump kernel
.Xr rump 3 .
.It Pa secmodel/
Security model framework
.Xr secmodel 9 .
.It Pa stand/
Source for several standalone programs that aren't used by
.Nx
currently.
.It Pa sys/
Header files that get installed into
.Pa /usr/include/sys .
.It Pa ufs/
UFS file system driver.
.It Pa uvm/
Virtual memory manager.
.El
.It Pa tests/
Source for test programs in
.Pa /usr/tests .
These tests use the
.Xr atf 7
test framework.
For library routines, including system calls, the
directory structure of the tests should follow the
directory structure of the real source tree.
For instance, interfaces available via the C
library should follow:
.Pa src/lib/libc/gen -> Pa src/tests/lib/libc/gen ,
.Pa src/lib/libc/sys -> Pa src/tests/lib/libc/sys ,
etc.
Equivalently, all tests for userland utilities
should try to follow their location in the source tree.
If this can not be satisfied, the tests for
a utility should be located under the directory to which
the utility is installed.
Thus, a test for
.Xr env 1
should go to
.Pa src/tests/usr.bin/env .
Likewise, a test for
.Xr tcpdump 8
should be in
.Pa src/tests/usr.sbin/tcpdump ,
even though the source code for the program is located under
.Pa src/external .
.It Pa tools/
Reachover build structure for the host build tools.
Every utility has its own directory, where its Makefile
is located.
.It Pa x11/
Reachover build structure for X11R7; the source is in
.Pa X11SRCDIR .
The directory structure copies the system\'s;
every directory contains a Makefile.
.El
.Sh SEE ALSO
.Xr hier 7
.Sh HISTORY
This file was created as a part of Google Code-in 2012/2013.
.Sh AUTHORS
.An -nosplit
This manpage was written by
.An Elvira Khabirova Aq Mt skinder0@gmail.com ,
the
.Pa sys/
part by
.An Mingzhe Wang .