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NAME
     dtspcdenv - environment Variable File for the CDE Subprocess
     Control Service

DESCRIPTION
     The CDE Subprocess Control service provides the ability  for
     a process running on one system to invoke another process on
     a different system.  By default, the  environment  variables
     of  the  parent  process  are passed unmodified to the child
     process (on  the  remote  host);  however,  there  are  some
     environment  variables  that are given special handling.  In
     addition, the  user  or  system  administrator  can  specify
     environment  variables that should be modified when they are
     passed to the child process.

     The system-wide environment files are:
     /etc/dt/config/dtspcdenv
     /usr/dt/config/dtspcdenv

     and the user-specific environment file is:
     $HOME/.dt/dtspcdenv

     The file /usr/dt/config/dtspcdenv is  created  when  CDE  is
     installed.   This  file may be overwritten by subsequent CDE
     installations.   Consequently,  local  variable  definitions
     should   be  placed  in  the  file  /etc/dt/config/dtspcdenv
     because this file is not overwritten during installation.

     The environment variable files are evaluated in the  follow-
     ing order:
     local host:  /usr/dt/config/dtspcdenv
     local host:  /etc/dt/config/dtspcdenv
     local host:  $HOME/.dt/dtspcdenv
     remote host: /usr/dt/config/dtspcdenv
     remote host: /etc/dt/config/dtspcdenv
     remote host: $HOME/.dt/dtspcdenv

     The precedence occurs in the reverse  order  of  evaluation.
     Thus,  variables  in  the  remote host's $HOME/.dt/dtspcdenv
     file have the highest precedence and variables in the  local
     host's  /etc/dt/config/dtspcdenv  file  have the lowest pre-
     cedence.  In this context, the local host is the host  where
     a  CDE  client  is  running  and the remote host is the host
     where a remote process will be started  (on  behalf  of  the
     local client).

     Lines beginning with a numer symbol (#) are considered  com-
     ments and are not processed.

     The syntax for a non-commented line is:


          VAR_NAME=some_value

     where VAR_NAME is the name of an  environment  variable  and
     some_value is the value assigned to the variable.

     If some_value contains a variable reference,  the  reference
     will be replaced by the variable's value.  For example, if a
     CDE client has the following definition in its environment:

          PATH=/bin:/sbin:/usr/local/bin

     and the following definition occurs in one of  the  environ-
     ment files:

          PATH=/opt/foo/bin:$PATH

     then before the remote process is executed, PATH

     will be expanded to:

          PATH=/opt/foo/bin:/bin:/sbin:/usr/local/bin

     The environment  variable  names  may  consist  of  letters,
     digits or underscores and may be enclosed in curly braces.

     The  environment   variable   files   may   contain   "unset
     <variable_name>" commands to prevent an environment variable
     from being propagated to the remote process.   For  example,
     the  following line would prevent the variable LIB_PATH from
     being propagated to the remote process:

          unset LIB_PATH

ENVIRONMENT VARIABLES
     The dtspcd daemon treats the following variables specially:

        DISPLAY        If   DISPLAY   is   set   to   "unix:<n>",
                       "local:<n>"  or  ":<n>"  (where <n> is the
                       screen number),  then  before  the  remote
                       process is executed, DISPLAY is changed to
                       the name of the local host and the  screen
                       number is preserved.

        HOME           Before the  remote  process  is  executed,
                       HOME  is  set  to  the value of the user's
                       home directory in the password file on the
                       remote host.

        SHELL          If SHELL is not in  the  parent  processes
                       environment,  SHELL is set to the value of
                       the user's shell in the password  file  on
                       the remote host.

        PWD            The variable PWD is not propagated to  the
                       remote host.

                       Note that  the  above  variables  will  be
                       overridden  by their corresponding defini-
                       tions in an environment file.

EXAMPLES
     The following definition sets the variable  FOO_BIN_PATH  to
     the value /var/foo/bin:

     FOO_BIN_PATH=/var/foo/bin

FILES
                       /usr/dt/config/dtspcdenv
                                      System-wide,      installed
                                      environment variable defin-
                                      itions used when a  process
                                      is executed

                       /etc/dt/config/dtspcdenv
                                      System-wide,        locally
                                      defined  environment  vari-
                                      able definitions used  when
                                      a process is executed

                       $HOME/.dt/dtspcdenv
                                      User-specific   environment
                                      variable  definitions  used
                                      when a process is executed

SEE ALSO
     dtspcd(1).

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