ENVIRON(5-SysV)     RISC/os Reference Manual      ENVIRON(5-SysV)



NAME
     environ - user environment

DESCRIPTION
     An array of strings called the ``environment'' is made
     available by exec(2) 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 sh(1),
               time(1), nice(1), nohup(1), etc., apply in search-
               ing for a file known by an incomplete path name.
               The prefixes are separated by colons (:).
               login(1) sets PATH=:/bin:/usr/bin.

     HOME      Name of the user's login directory, set by
               login(1) from the password file passwd(4).

     PERRORFMT
               The format string for system-related error mes-
               sages printed by the perror(3) subroutine.  See
               perror(3) for details.

     TERM      The kind of terminal for which output is to be
               prepared.  This information is used by commands
               which may exploit special capabilities of that
               terminal.

     TZ        Time zone information. The format is xxxnzzz where
               xxx is standard local time zone abbreviation, n is
               the difference in hours from GMT, and zzz is the
               abbreviation for the daylight-saving local time
               zone, if any; for example, EST5EDT.

     Further names may be placed in the environment by the export
     command and ``name=value'' arguments in sh(1), or by
     exec(2).  It is unwise to conflict with certain shell vari-
     ables that are frequently exported by .profile files:  MAIL,
     PS1, PS2, IFS.

SEE ALSO
     exec(2).
     env(1), login(1), nice(1), nohup(1), sh(1), time(1), in the
     User's Reference Manual.











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