How to detect client OS from SQL*Plus script

Question

Sometimes in a SQL*Plus script I need to execute OS commands e.g.
host rm tempfile.bufHowever of course Windows has no "rm" command by default, so I have to edit the script to use
host del tempfile.bufNow if I could define &DELETE (for example, "cat"/"type" is another) as a substitution variable, I could just use
host &DELETE tempfile.bufMaybe I need more coffee but all I could come up with was something like this:
def rm=rm
def cat=cat
spool sqlplus_windows_defs.cmd
prompt echo def rm=del
prompt echo def cat=type
spool off
host .\sqlplus_windows_defs > sqlplus_windows_defs.sql
@sqlplus_windows_defs.sql
host &rm sqlplus_windows_defs.cmd
host &rm sqlplus_windows_defs.sqlthe idea being that you first define the variables for nix ("rm" and "cat"), then attempt to create and execute a Windows command file containing DOS versions ("dele" and "type"), which does not run under nix. Unfortunately the OS failure message (".sqlplus_windows_defs: not found" in Unix) appears on the screen despite SET TERM OFF, so I'm back where I started.
I know there are various ways to get the server OS, and you can get the SQL*Plus version with &_SQLPLUS_RELEASE and so on, but I can't see a way to determine the client OS. Any suggestions?

Answer 1

Thanks guys. This seems to work in Windows XP - will try on Unix when I get a chance:
col DELETE_COMMAND new_value DELETE_COMMAND
col LIST_COMMAND new_value LIST_COMMAND
def list_command = TYPE
def delete_command = DEL
SELECT DECODE(os,'MSWIN','TYPE','cat') AS list_command
     , DECODE(os,'MSWIN','DEL','rm')   AS delete_command
FROM   ( SELECT CASE WHEN UPPER(program) LIKE '%.EXE' THEN 'MSWIN' END AS os
         FROM   v$session
         WHERE  audsid = SYS_CONTEXT('userenv','sessionid') );
host &LIST_COMMAND xplan_errors.lst
host &DELETE_COMMAND xplan_errors.lstIf the user doesn't have access to v$session it will just default to the Windows commands.
http://www.williamrobertson.net/code/xplan.sql