HP 3000 Manuals

Command Interpreter Access and Variables Programmer's Guide

Redirection File Defaults 

If a file equation is not used to specify the characteristics of an
output redirection, file the following are taken as defaults:

       256-byte, variable length, ASCII records

       DISC=10000

       Temporary file domain

       NOCCTL

When output is redirected using the > filename redirection specification
to a temporary file which already exists, the following defaults apply to
the open:

   *   WRITE

   *   SHARED access

   *   MULTI access

If the >>filename specification is used instead, APPEND access is
requested instead of WRITE.

A default also exists for input redirection.  A file to which input has
been redirected is opened by first attempting to open a temporary file
with the name specified.  This makes default input redirection consistent
with default output redirection.  If no such temporary file exists, an
attempt is made to open a permanent file with that name.

When input is redirected, the file must exist and is opened with the
following defaults:

   *   Look for a temporary file first, then an old permanent file

   *   READ, SHARED access

MPE/iX 5.0 Documentation