environ(7)environ(7)Nameenviron - user environment
Syntax
extern char **environ;
Description
An array of strings, called the environment, is made available by when
a process begins. By convention, these strings have the form
``name=value''. The following names are used by various commands:
PATH The sequence of directory prefixes that and apply in searching
for a file known by an incomplete path name. The prefixes are
separated by a colon (:). The command sets
HOME A user's login directory, set by from the password file
TERM The kind of terminal for which output is to be prepared. This
information is used by commands, such as or which may exploit
special terminal capabilities. See in for a list of terminal
types.
SHELL The file name of the user's login shell.
TERMCAP The string describing the terminal in TERM or the name of the
termcap file. For further information, see and
EXINIT A startup list of commands read by and
USER The login name of the user.
PRINTER The name of the default printer to be used by and
Further names may be placed in the environment by the command and
``name=value'' arguments in or by the command if you use Arguments can
also be placed in the environment at the point of an It is unwise to
conflict with certain variables that are frequently exported by files:
and
See Alsocsh(1), ex(1), login(1), sh(1), execve(2), system(3), termcap(3x),
passwd(5), termcap(5)environ(7)
