NAME
environ —
user process
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:
-
-
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).
-
-
PAGER
- 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.
SEE ALSO
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)
HISTORY
The
environ manual page appeared in
4.2BSD.