Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (NetBSD-6.1.5)
Apropos / Subsearch:
optional field

ENVIRON(7)             Miscellaneous Information Manual             ENVIRON(7)

     environ -- user process environment

     extern char **environ;

     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.

     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

     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 malloc(3) for more information.

     MIXERDEVICE          The name of the audio mixer device to be used by

     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

     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


                          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

     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), malloc(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.

NetBSD 6.1.5                   January 21, 2011                   NetBSD 6.1.5