>> environ (7) ( FreeBSD man: Макропакеты и соглашения )
environ (7) ( Linux man: Макропакеты и соглашения )
BSD mandoc
NAME
environ
- user environment
SYNOPSIS
extern char **environ
DESCRIPTION
An array of strings called the
environment
is made available by
execve(2)
when a process begins.
By convention these strings have the form
``name=value
''
The following names are used by various commands:
BLOCKSIZE
The size of the block units used by several commands, most notably
df(1),
du(1)
and
ls(1).
BLOCKSIZE
may be specified in units of a byte by specifying a number,
in units of a kilobyte by specifying a number followed by ``K'' or
``k'', in units of a megabyte by specifying a number followed by ``M''
or ``m'' and in units of a gigabyte by specifying a number followed
by ``G'' or ``g''.
Sizes less than 512 bytes or greater than a gigabyte are ignored.
COLUMNS
The user's preferred width in column positions for the terminal.
Utilities such as
ls(1)
and
who(1)
use this to format output into columns.
If unset or empty, utilities will use an
ioctl(2)
call to ask the terminal driver for the width.
EDITOR
Default editor name.
EXINIT
A startup list of commands read by
ex(1)
and
vi(1).
HOME
A user's login directory, set by
login(1)
from the password file
passwd(5).
LANG
This variable configures all programs which use
setlocale(3)
to use the specified locale unless the
LC_*
variables are set.
LC_ALL
Overrides the values of
LC_COLLATELC_CTYPELC_MESSAGESLC_MONETARYLC_NUMERICLC_TIME
and
LANG
LC_COLLATE
Locale to be used for ordering of strings.
LC_CTYPE
Locale to be used for character classification
(letter, space, digit, etc.) and for interpreting byte sequences as
multibyte characters.
LC_MESSAGES
Locale to be used for diagnostic messages.
LC_MONETARY
Locale to be used for interpreting monetary input
and formatting output.
LC_NUMERIC
Locale to be used for interpreting numeric input and
formatting output.
LC_TIME
Locale to be used for interpreting dates input and
for formatting output.
MAIL
The location of the user's
mailbox instead of the default in /var/mail,
used by
mail(1),
sh(1),
and many other mail clients.
NLSPATH
List of directories to be searched for the message catalog referred to by
LC_MESSAGES
See
catopen(3).
PAGER
Default paginator program.
The program specified by this variable is used by
mail(1),
man(1),
ftp(1),
etc, to display information which is longer than the current display.
PATH
The sequence of directories, separated by colons, searched by
csh(1),
sh(1),
system(3),
execvp(3),
etc, when looking for an executable file.
PATH
is set to ``/usr/bin:/bin'' initially by
login(1).
PRINTER
The name of the default printer to be used by
lpr(1),
lpq(1),
and
lprm(1).
PWD
The current directory pathname.
SHELL
The full pathname of the user's login shell.
TERM
The kind of terminal for which output is to be prepared.
This information is used by commands, such as
nroff(1)
or
plot(1)
which may exploit special terminal capabilities.
See
/usr/share/misc/termcap
(termcap(5)
)
for a list of terminal types.
TERMCAP
The string describing the terminal in
TERM
or, if
it begins with a '/', the name of the termcap file.
See
TERMPATH
below, and
termcap(5).
TERMPATH
A sequence of pathnames of termcap files, separated by colons or spaces,
which are searched for terminal descriptions in the order listed.
Having
no
TERMPATH
is equivalent to a
TERMPATH
of
``$HOME/.termcap:/etc/termcap
''
TERMPATH
is ignored if
TERMCAP
contains a full pathname.
TMPDIR
The directory in which to store temporary files.
Most applications use either
``/tmp''
or
``/var/tmp''
Setting this variable will make them use another directory.
TZ
The timezone to use when displaying dates.
The normal format is a pathname relative to
``/usr/share/zoneinfo
''
For example, the command
``env TZ=America/Los_Angeles date''
displays the current time in California.
See
tzset(3)
for more information.
USER
The login name of the user.
Further names may be placed in the environment by the
export
command and
name=value
arguments in
sh(1),
or by the
setenv
command if you use
csh(1).
It is unwise to change certain
sh(1)
variables that are frequently exported by
.profile
files, such as
MAILPS1PS2
and
IFS
unless you know what you are doing.
The current environment variables can be printed with
env(1),
set(1)
or
printenv(1)
in
sh(1)
and
env(1),
printenv(1)
or the
printenv
built-in command in
csh(1).
