environ
—
user process environment
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:
AUDIOCTLDEVICE
- The name of the audio control device to be used by
audioctl(1),
audioplay(1) and
audiorecord(1).
AUDIODEVICE
- The name of the audio device to be used by
audioplay(1) and
audiorecord(1).
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.
EDITRC
- Gives the path name of the file used by
editline(7) when command
line editing is enabled in various programs. See
editrc(5) for information on
the format of the file.
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
- Default for all NLS categories. Only used if
LC_ALL
or the environment variable for a
particular NLS category is not provided
(LC_COLLATE
, LC_CTYPE
,
LC_MESSAGES
, LC_MONETARY
,
LC_NUMERIC
, or
LC_TIME
).
LC_ALL
- Override for all NLS categories. If set, overrides the values of
LC_COLLATE
, LC_CTYPE
,
LC_MESSAGES
, LC_MONETARY
,
LC_NUMERIC
, and
LC_TIME
.
LC_COLLATE
- NLS string-collation order information.
LC_CTYPE
- NLS character classification, case conversion, and other character
attributes.
LC_MESSAGES
- NLS format for affirmative and negative responses.
LC_MONETARY
- NLS rules and symbols for formatting monetary numeric information.
LC_NUMERIC
- NLS rules and symbols for formatting nonmonetary numeric information.
LC_TIME
- NLS rules and symbols for formatting time and date information.
LIBC_DIAGASSERT
- Control how the
_DIAGASSERT
() macro (from
<assert.h>
) behaves once
the assertion is raised. Refer to
_DIAGASSERT(3) for more
information.
LOGNAME
- The login name of the user.
MALLOC_OPTIONS
- Control the behaviour of the
malloc
() function.
Refer to jemalloc(3) for
more information.
MIXERDEVICE
- The name of the audio mixer device to be used by
mixerctl(1).
- The program used for paginating the output of several commands such as
man(1). If null or not set, the
standard pagination program
more(1) will be used.
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:/usr/pkg/bin:/usr/local/bin
initially by
login(1).
PRINTER
- The name of the default printer to be used by
lpr(1),
lpq(1), and
lprm(1).
RCMD_CMD
- When using the rcmd(3)
function, this variable is used as the program to run instead of
rcmd(1).
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) which may exploit
special terminal capabilities. See
/usr/share/misc/terminfo
(terminfo(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. This is only checked if TERMINFO
is not set.
TERMINFO
- The string describing the terminal in
TERM
, or, if
it begins with a ‘/
’, the name of
the terminfo file.
TIMEFORMAT
- A strftime(3) format
string that may be used by programs such as
dump(8) for formatting
timestamps.
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=US/Pacific
date
displays the current time in California. See
tzset(3) for more
information.
USER
- The login name of the user. It is recommended that portable applications
use
LOGNAME
instead.
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
MAIL
, PS1
,
PS2
, and IFS
, unless you
know what you are doing.
audioctl(1),
audioplay(1),
audiorecord(1),
csh(1),
ex(1),
login(1),
man(1),
more(1),
sh(1),
execve(2),
_DIAGASSERT(3),
execle(3),
jemalloc(3),
rcmd(3),
system(3),
termcap(3),
terminfo(3),
audio(4),
terminfo(5),
nls(7),
dump(8)
The environ
manual page appeared in
4.2BSD.