environ(3)            MPE/iX Shell and Utilities            environ(3)
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  NAME
       environ -- standard environment variables

  SYNOPSIS
       export NAME=value

       echo $NAME

  DESCRIPTION
       When a process is executed, it inherits a set of strings called
       the environment. It is conventional for these strings to have the
       form:

          NAME=value

       The export command built into the MPE/iX Shell can be used to set
       the variable NAME into the environment of every child process.
       The echo command prints the value of environment variable NAME
       inside the MPE/iX Shell.  Note that the shell maintains addi-
       tional shell variables which are not exported to child processes;
       because these variables are not passed on, they are not environ-
       ment variables.

       The following environment variables are used throughout MPE/iX
       Shell and Utilities:

       COLUMNS   If you set this variable to a numeric value, various
                 commands use its value as the width of the output
                 device in columns.  This overrides the default.

       ENV       The value of this variable is the name of a file of
                 MPE/iX Shell commands, or else be null.  When the
                 MPE/iX Shell is invoked, the file named by ENV is exe-
                 cuted before the MPE/iX Shell does anything else.  Thus
                 your ENV file may contain definitions of aliases, shell
                 functions, etc. that may be used by shell scripts.
                 Note that your ENV file is executed, whether or not the
                 MPE/iX Shell is invoked as a login shell.

       HOME      This variable is set when you start the MPE/iX Shell.
                 It contains the name of your home directory, which is
                 the default directory for cd(1).

       LINES     If you set this variable to a numeric value, various
                 commands use its value as the number of lines available
                 on the output device.  This overrides the default.

       LOGNAME   This variable is set by login on DOS and OS/2, and by
                 the shell's default startup files on NT.  It holds the
                 user name of the current user.

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  environ(3)            MPE/iX Shell and Utilities            environ(3)
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       MAILER    For commands which send mail, this variable points at a
                 mail delivery program.  If this variable is not set,
                 then the default mailer, mailx is invoked.

       PATH      This variable is set to a default value when you start
                 the MPE/iX Shell.  Normally, it is also set in your
                 profile file.  It lists the directories that are to be
                 searched to find commands, as described in sh(1).

       SHELL     This variable contains the full path name of the shell
                 being used.

       TERM      This variable contains the terminal type.

       TMPDIR    By default, MPE/iX Shell and Utilities commands store
                 temporary files under /tmp.  To use a different direc-
                 tory for temporary files, set TMPDIR to the name of the
                 directory you want to use.

       TZ        Commands that print times (and dates) use this variable
                 to determine the time zone.  The TZ variable is nor-
                 mally set in the /etc/profile file for system-wide use.
                 See timezone(3) for details.

  SEE ALSO
       cd(1), env(1), sh(1), timezone(3)

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