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Annotation of 43BSDReno/old/man/environ.5, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1980 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)environ.5   4.1 (Berkeley) 5/15/85
        !             6: .\"
        !             7: .TH ENVIRON 5
        !             8: .UC 4
        !             9: .SH NAME
        !            10: environ \- user environment
        !            11: .SH SYNOPSIS
        !            12: .B extern char **environ;
        !            13: .SH DESCRIPTION
        !            14: An array of strings called the `environment' is
        !            15: made available by
        !            16: .IR exec (2)
        !            17: when a process begins.
        !            18: By convention these strings have the form
        !            19: .RI ` name = value '.
        !            20: The following names are used by various commands:
        !            21: .TP "\w'TERMCAP 'u"
        !            22: PATH
        !            23: The sequence of directory prefixes that
        !            24: .I sh, time,
        !            25: .IR nice (1),
        !            26: etc.,
        !            27: apply in searching for a file known by an incomplete path name.
        !            28: The prefixes are separated by `:'.
        !            29: .IR Login (1)
        !            30: sets PATH=:/usr/ucb:/bin:/usr/bin.
        !            31: .TP
        !            32: HOME
        !            33: A user's login directory, set by
        !            34: .IR login (1)
        !            35: from the password file
        !            36: .IR passwd (5).
        !            37: .TP
        !            38: TERM
        !            39: The kind of terminal for which output is to be prepared.
        !            40: This information is used by commands, such as
        !            41: .I nroff
        !            42: or
        !            43: .IR plot (1),
        !            44: which may exploit special terminal capabilities.
        !            45: See
        !            46: .I /etc/termcap
        !            47: .RI ( termcap (5))
        !            48: for a list of terminal types.
        !            49: .TP
        !            50: SHELL
        !            51: The file name of the users login shell.
        !            52: .TP
        !            53: TERMCAP
        !            54: The string describing the terminal in TERM,
        !            55: or the name of the termcap file, see
        !            56: .IR termcap (5), termlib (3).
        !            57: .TP
        !            58: EXINIT
        !            59: A startup list of commands read by
        !            60: .IR ex (1),
        !            61: .IR edit (1),
        !            62: and
        !            63: .IR vi (1).
        !            64: .TP
        !            65: USER
        !            66: The login name of the user.
        !            67: .PP
        !            68: Further names may be placed in the environment by
        !            69: the
        !            70: .I export
        !            71: command and `name=value' arguments in
        !            72: .IR sh (1),
        !            73: or by the
        !            74: .I setenv
        !            75: command if you use
        !            76: .IR csh (1).
        !            77: Arguments may also be placed in the environment at the point of an
        !            78: .IR exec (2).
        !            79: It is unwise to conflict with
        !            80: certain 
        !            81: .IR sh (1)
        !            82: variables that are frequently exported by
        !            83: `.profile' files:
        !            84: MAIL, PS1, PS2, IFS.
        !            85: .SH SEE ALSO
        !            86: csh(1), ex(1), login(1), sh(1), exec(2), system(3), termlib(3), termcap(5), term(7)

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