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32 .\" @(#)environ.7 8.3 (Berkeley) 4/19/94
42 .Ar extern char **environ ;
44 An array of strings called the
48 when a process begins.
49 By convention these strings have the form
51 The following names are used by various commands:
52 .Bl -tag -width LC_MONETARY
54 The size of the block units used by several commands, most notably
60 may be specified in units of a byte by specifying a number,
61 in units of a kilobyte by specifying a number followed by ``K'' or
62 ``k'', in units of a megabyte by specifying a number followed by ``M''
63 or ``m'' and in units of a gigabyte by specifying a number followed
65 Sizes less than 512 bytes or greater than a gigabyte are ignored.
67 The user's preferred width in column positions for the terminal.
72 use this to format output into columns.
73 If unset or empty, utilities will use an
75 call to ask the terminal driver for the width.
79 A startup list of commands read by
84 A user's login directory, set by
86 from the password file
89 This variable configures all programs which use
91 to use the specified locale unless the
95 Overrides the values of
105 Locale to be used for ordering of strings.
107 Locale to be used for character classification
108 (letter, space, digit, etc.) and for interpreting byte sequences as
109 multibyte characters.
111 Locale to be used for diagnostic messages.
113 Locale to be used for interpreting monetary input
114 and formatting output.
116 Locale to be used for interpreting numeric input and
119 Locale to be used for interpreting dates input and
120 for formatting output.
122 The location of the user's
123 mailbox instead of the default in /var/mail,
127 and many other mail clients.
129 List of directories to be searched for the message catalog referred to by
134 Default paginator program.
135 The program specified by this variable is used by
139 etc, to display information which is longer than the current display.
141 The sequence of directories, separated by colons, searched by
146 etc, when looking for an executable file.
148 is set to ``/usr/bin:/bin'' initially by
151 The name of the default printer to be used by
157 The current directory pathname.
159 The full pathname of the user's login shell.
161 The kind of terminal for which output is to be prepared.
162 This information is used by commands, such as
166 which may exploit special terminal capabilities.
168 .Pa /usr/share/misc/termcap
170 for a list of terminal types.
172 The string describing the terminal in
175 it begins with a '/', the name of the termcap file.
181 A sequence of pathnames of termcap files, separated by colons or spaces,
182 which are searched for terminal descriptions in the order listed.
189 .Dq Pa $HOME/.termcap:/etc/termcap .
193 contains a full pathname.
195 The directory in which to store temporary files.
196 Most applications use either
200 Setting this variable will make them use another directory.
202 The timezone to use when displaying dates.
203 The normal format is a pathname relative to
204 .Dq Pa /usr/share/zoneinfo .
205 For example, the command
206 .Dq env TZ=America/Los_Angeles date
207 displays the current time in California.
210 for more information.
212 The login name of the user.
215 Further names may be placed in the environment by the
225 It is unwise to change certain
227 variables that are frequently exported by
235 unless you know what you are doing.
237 The current environment variables can be printed with
270 manual page appeared in