.\" $NetBSD: src.7,v 1.17 2022/08/21 07:10:03 lukem Exp $
.\"
.\" Copyright (c) 2012, 2013 Mingzhe Wang and Elvira Khabirova.
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.Dd May 14, 2020
.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> .
For example,
.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.
For example,
.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.
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.
For example,
.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 games/
Sources for utilities/files in
.Pa /usr/games ;
each utility has its own subdirectory, where
its sources and Makefiles are located.
.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 algorithms 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 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 netcan/
Controller Area Network stack
.Xr can 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 netmpls/
MPLS protocol stack
.Xr mpls 4 .
.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 .