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environ(5)
NAME
  environ - User environment

SYNOPSIS
  extern char **environ;

DESCRIPTION
  An array of strings called the environment is made available by the
  execve() function when a process begins.  By convention these strings have
  the form name=value. The following names are used by various commands:

  EXINIT
      A startup list of commands read by ex, edit, and vi.

  HOME
      A user's login directory, set by login from the password file passwd.

  PATH
      The sequence of directories, separated by colons, searched by csh, sh,
      system, execvp, etc, when looking for an executable file.	 PATH is set
      to :/usr/ucb:/bin:/usr/bin initially by login.

  PRINTER
      The name of the default printer to be used by lpr, lpq, and lprm.

  SHELL
      The full pathname of the user's login shell.

  TERM
      The kind of terminal for which output is to be prepared. This
      information is used by commands, such as nroff which may exploit
      special terminal capabilities.  .\" See /usr/share/misc/termcap for a
      list of terminal types. .\"from TP " .\" Bold under TP !" -->

  TERMCAP
      The string describing the terminal in the TERM environment variable,
      or, if it begins with a / (slash), the name of the termcap file. See
      TERMPATH below.

  TERMPATH
      A sequence of pathnames of termcap files, separated by colons or
      spaces, which are searched for terminal descriptions in the order
      listed.  Having no TERMPATH is equivalent to a TERMPATH of
      $HOME/.termcap:/etc/termcap.  TERMPATH is ignored if TERMCAP contains a
      full pathname.

  USER
      The login name of the user.

  Further names may be placed in the environment by the export command and
  name=value arguments in sh, or by the setenv command if you use csh. It is
  unwise to change certain sh variables that are frequently exported by
  .profile files, such as MAIL, PS1, PS2, and IFS.

SEE ALSO
  Functions: exec(2), system(3)

  Commands: csh(1), ex(1), login(1), sh(1)

Index for Section 5

Alphabetical listing for E

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