term% cat index.txt NAMESPACE(4) Kernel Interfaces Manual NAMESPACE(4)
NAME
namespace - structure of conventional file name space
SYNOPSIS
none
DESCRIPTION
After a user's profile has run, the file name space should adhere to a
number of conventions if the system is to behave normally. This manual
page documents those conventions by traversing the file hierarchy and
describing the points of interest. It also serves as a guide to where
things reside in the file system proper. The traversal is far from ex‐
haustive.
First, here is the appearance of the file server as it appears before
any mounts or bindings.
/ The root directory.
/adm The administration directory for the file server.
/adm/users
List of users known to the file server; see users(6).
/adm/keys
Authentication keys for users.
/adm/netkeys
SecureNet keys for users; see securenet(8).
/adm/timezone
Directory of timezone files; see ctime(2).
/adm/timezone/EST.EDT
Time zone description for Eastern Time. Other such files are in
this directory too.
/adm/timezone/timezone
Time zone description for the local time zone; a copy of one of
the other files in this directory.
/bin
/dev
/env
/fd
/net
/proc
/srv
/shr
/tmp All empty unwritable directories, place holders for mounted ser‐
vices and directories.
/mnt A directory containing mount points for applications.
/n A directory containing mount points for file trees imported from
remote systems.
/386
/68000
/68020
/alpha
/arm
/mips
/power
/sparc Each CPU architecture supported by Plan 9 has a directory in the
root containing architecture-specific files, to be selected ac‐
cording to $objtype or $cputype (see 2c(1) and init(8)). Here
we list only those for /386.
/386/init
The initialization program used during bootstrapping; see
init(8).
/386/bin
Directory containing binaries for the Intel x86 architecture.
/386/bin/aux
/386/bin/ip
etc. Subdirectories of /386/bin containing auxiliary tools and col‐
lecting related programs.
/386/lib
Directory of object code libraries as used by 8l (see 2l(1)).
/386/include
Directory of x86-specific C include files.
/386/9*
The files in /386 beginning with a 9 are binaries of the operat‐
ing system or its bootstrap loader.
/386/mkfile
Selected by mk(1) when $objtype is 386, this file configures mk
to compile for the Intel x86 architecture.
/rc Isomorphic to the architecture-dependent directories, this holds
executables and libraries for the shell, rc(1).
/rc/bin
Directory of shell executable files.
/rc/lib
Directory of shell libraries.
/rc/lib/rcmain
Startup code for rc(1).
/lib Collections of data, generally not parts of programs.
/lib/mammals
/lib/sky
etc. Databases.
/lib/ndb
The network database used by the networking software; see ndb(6)
and ndb(8).
/lib/namespace
The file used by newns (see auth(2)) to establish the default
name space; see namespace(6).
/lib/font/bit
Bitmap font files.
/lib/font/hershey
Vector font files.
/lib/rfc
Directory of Internet `Requests For Comments', ranging from
trivia to specifications.
/lib/rfc/grabrfc
Maintains RFC collection; usually run from cron (see auth(8)).
/sys System software.
/sys/include
Directory of machine-independent C include files.
/sys/lib
Pieces of programs not easily held in the various bins.
/sys/lib/acid
Directory of acid(1) load modules.
/sys/lib/dist
Software used to assemble the distribution's installation
floppy.
/sys/lib/troff
Directory of troff(1) font tables and macros.
/sys/lib/yaccpar
The yacc(1) parser.
/sys/man
The manual.
/sys/doc
Other system documentation.
/sys/log
Log files created by various system services.
/sys/src
Top-level directory of system sources.
/sys/src/cmd
Source to the commands in the bin directories.
/sys/src/9
Source to the operating system for terminals and CPU servers.
/sys/src/fs
Source to the operating system for file servers.
/sys/src/lib*
Source to the libraries.
/usr A directory containing home directories of users.
/mail Directory of electronic mail; see mail(1).
/mail/box
Directory of users' mail box files.
/mail/lib
Directory of alias files, etc.
/acme Directory of tools for acme(1).
/cron Directory of files for cron(8).
/cfg/system
System-specific files, often addenda to their namesakes, notably
cpurc, termrc, namespace, and consoledb.
The following files and directories are modified in the standard name
space, as defined by /lib/namespace (see namespace(6)).
/ The root of the name space. It is a kernel device, root(3),
serving a number of local mount points such as /bin and /dev as
well as the bootstrap program /boot. Unioned with / is the root
of the main file server.
/boot Compiled into the operating system kernel, this file establishes
the connection to the main file server and starts init; see
boot(8) and init(8).
/bin Mounted here is a union directory composed of /$objtype/bin,
/rc/bin, $home/$objtype/bin, etc., so /bin is always the direc‐
tory containing the appropriate executables for the current ar‐
chitecture.
/dev Mounted here is a union directory containing I/O devices such as
the console (cons(3)), the interface to the raster display
(draw(3)), etc. The window system, rio(1), prefixes this direc‐
tory with its own version, overriding many device files with its
own, multiplexed simulations of them.
/env Mounted here is the environment device, env(3), which holds en‐
vironment variables such as $cputype.
/net Mounted here is a union directory formed of all the network de‐
vices available.
/net/cs
The communications point for the connection server, ndb/cs (see
ndb(8)).
/net/dns
The communications point for the Domain Name Server, ndb/dns
(see ndb(8)).
/net/tcp
/net/udp
Directories holding the IP protocol devices (see ip(3)).
/proc Mounted here is the process device, proc(3), which provides de‐
bugging access to active processes.
/fd Mounted here is the dup device, dup(3), which holds pseudonyms
for open file descriptors.
/shr Mounted here is the global mountpoint device, shr(3), which
holds mounted filesystems visible in all namespaces.
/srv Mounted here is the service registry, srv(3), which holds con‐
nections to file servers.
/srv/boot
The communication channel to the main file server for the ma‐
chine.
/mnt/wsys
Mount point for the window system.
/mnt/term
Mount point for the terminal's name space as seen by the CPU
server after a cpu(1) command.
/n/kremvax
A place where machine kremvax's name space may be mounted.
/tmp Mounted here is each user's private tmp, $home/tmp.
SEE ALSO
intro(1), namespace(6)
NAMESPACE(4)