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32 .\" @(#)environ.7 8.3 (Berkeley) 4/19/94
33 .\" $FreeBSD: src/share/man/man7/environ.7,v 1.13.2.4 2001/08/17 13:08:49 ru Exp $
42 .Ar extern char **environ ;
44 An array of strings called the
48 when a process begins. By convention these strings have the form
50 The following names are used by various commands:
51 .Bl -tag -width BLOCKSIZE
53 The size of the block units used by several commands, most notably
59 may be specified in units of a byte by specifying a number,
60 in units of a kilobyte by specifying a number followed by ``K'' or
61 ``k'', in units of a megabyte by specifying a number followed by ``M''
62 or ``m'' and in units of a gigabyte by specifying a number followed
64 Sizes less than 512 bytes or greater than a gigabyte are ignored.
68 A startup list of commands read by
73 A user's login directory, set by
75 from the password file
78 This variable configures all programs which use
80 to use the specified locale.
82 The location of the user's
83 mailbox instead of the default in /var/mail,
87 and many other mailclients.
89 Default paginator program. The program specified by this variable is used by
93 etc, to display information which is longer than the current display.
95 The sequence of directories, separated by colons, searched by
100 etc, when looking for an executable file.
102 is set to ``/usr/bin:/bin'' initially by
105 The name of the default printer to be used by
111 The current directory pathname.
113 The full pathname of the user's login shell.
115 The kind of terminal for which output is to be prepared.
116 This information is used by commands, such as
120 which may exploit special terminal capabilities. See
121 .Pa /usr/share/misc/termcap
123 for a list of terminal types.
125 The string describing the terminal in
128 it begins with a '/', the name of the termcap file.
134 A sequence of pathnames of termcap files, separated by colons or spaces,
135 which are searched for terminal descriptions in the order listed. Having
141 .Dq Pa $HOME/.termcap:/etc/termcap .
145 contains a full pathname.
147 The directory in which to store temporary files.
148 Most applications use either
152 Setting this variable will make them use another directory.
154 The timezone to use when displaying dates.
155 The normal format is a pathname relative to
156 .Dq Pa /usr/share/zoneinfo .
157 For example, the command
158 .Dq env TZ=America/Los_Angeles date
159 displays the current time in California.
162 for more information.
164 The login name of the user.
167 Further names may be placed in the environment by the
177 It is unwise to change certain
179 variables that are frequently exported by
187 unless you know what you are doing.
205 manual page appeared in