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Annotation of 43BSDTahoe/man/man7/environ.7, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1983 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.7   6.4 (Berkeley) 10/14/87
        !             6: .\"
        !             7: .TH ENVIRON 7 "October 14, 1987"
        !             8: .UC 5
        !             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
        !            15: .I environment
        !            16: is made available by
        !            17: .IR execve (2)
        !            18: when a process begins.  By convention these strings have the form
        !            19: ``\fIname=value\fP''.  The following names are used by various commands:
        !            20: .TP "\w'TERMPATH 'u"
        !            21: EXINIT
        !            22: A startup list of commands read by
        !            23: .IR ex (1),
        !            24: .IR edit (1),
        !            25: and
        !            26: .IR vi (1).
        !            27: .TP
        !            28: HOME
        !            29: A user's login directory, set by
        !            30: .IR login (1)
        !            31: from the password file
        !            32: .IR passwd (5).
        !            33: .TP
        !            34: PATH
        !            35: The sequence of directories, separated by colons, searched by
        !            36: .IR csh (1),
        !            37: .IR sh (1),
        !            38: .IR system (3),
        !            39: .IR execvp (3),
        !            40: etc, when looking for an executable file.
        !            41: PATH is set to ``:/usr/ucb:/bin:/usr/bin'' initially by
        !            42: .IR login (1).
        !            43: .TP
        !            44: PRINTER
        !            45: The name of the default printer to be used by
        !            46: .IR lpr (1),
        !            47: .IR lpq (1),
        !            48: and
        !            49: .IR lprm (1).
        !            50: .TP
        !            51: SHELL
        !            52: The full pathname of the user's login shell.
        !            53: .TP
        !            54: TERM
        !            55: The kind of terminal for which output is to be prepared.
        !            56: This information is used by commands, such as
        !            57: .IR nroff (1)
        !            58: or
        !            59: .IR plot (1G),
        !            60: which may exploit special terminal capabilities.  See
        !            61: .I /etc/termcap
        !            62: .RI ( termcap (5))
        !            63: for a list of terminal types.
        !            64: .TP
        !            65: TERMCAP
        !            66: The string describing the terminal in TERM, or, if
        !            67: it begins with a '/', the name of the termcap file.
        !            68: See TERMPATH below, 
        !            69: .IR termcap (5),
        !            70: and
        !            71: .IR termcap (3X).
        !            72: .TP
        !            73: TERMPATH
        !            74: A sequence of pathnames of termcap files, separated by colons or spaces,
        !            75: which are searched for terminal descriptions in the order listed.  Having
        !            76: no TERMPATH is equivalent to a TERMPATH of ``$HOME/.termcap:/etc/termcap''.
        !            77: TERMPATH is ignored if TERMCAP contains a full pathname.
        !            78: .TP
        !            79: USER
        !            80: The login name of the user.
        !            81: .PP
        !            82: Further names may be placed in the environment by the
        !            83: .I export
        !            84: command and
        !            85: .IR name = value
        !            86: arguments in
        !            87: .IR sh (1),
        !            88: or by the
        !            89: .I setenv
        !            90: command if you use
        !            91: .IR csh (1).
        !            92: It is unwise to change certain 
        !            93: .IR sh (1)
        !            94: variables that are frequently exported by
        !            95: .I .profile
        !            96: files, such as MAIL, PS1, PS2, and IFS,
        !            97: unless you know what you are doing.
        !            98: .SH SEE ALSO
        !            99: csh(1), ex(1), login(1), sh(1), execve(2), execle(3),
        !           100: system(3), termcap(3), termcap(5)

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