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.\" @(#)environ.7 6.6 (Berkeley) 7/19/91
.Ar extern char **environ ;
An array of strings called the
when a process begins. By convention these strings have the form
The following names are used by various commands:
A startup list of commands read by
A user's login directory, set by
The sequence of directories, separated by colons, searched by
etc, when looking for an executable file.
PATH is set to ``:/usr/ucb:/bin:/usr/bin'' initially by
The name of the default printer to be used by
The full pathname of the user's login shell.
The kind of terminal for which output is to be prepared.
This information is used by commands, such as
which may exploit special terminal capabilities. See
.Pa /usr/share/misc/termcap
for a list of terminal types.
The string describing the terminal in TERM, or, if
it begins with a '/', the name of the termcap file.
A sequence of pathnames of termcap files, separated by colons or spaces,
which are searched for terminal descriptions in the order listed. Having
.Dq Pa $HOME/.termcap:/etc/termcap .
contains a full pathname.
The login name of the user.
Further names may be placed in the environment by the
It is unwise to change certain
variables that are frequently exported by
unless you know what you are doing.