REXX Tips & Tricks, Version 2.80


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Environment variables used by OS/2


This section contains some information about undocumented or poorly 
documented environment variables used by OS/2. 
Please note, that you must use SET name=value to use the environment 
variables!   
 CONNECT_DASD=NO 
    Turns off DASD checking while installing OS/2. This enables the user 
    to install a product if the installation program thinks there is not 
    enough diskspace (used by the OS/2 WARP Connect installation program) 
 CONNECT_PREREQ=NO 
    Turns off prerequisite checking. This enables the user to install a 
    product when the installation program thinks that it cannot be 
    installed (used by the OS/2 WARP Connect installation program). 
 CONNECT_SNIFF=NO 
    Turns off network card detection. This may be necessary if the 
    detection logic hangs the machine while detecting adapters (used by 
    the OS/2 WARP Connect installation program). 
 COPYFROMFLOPPY=1 
    Set to 1, if the OS/2 installation program should copy drivers from 
    disk A: instead of copying this files from the CD-ROM 
 DELDIR=path_for_the_deleted_files 
    This is a real environment variable, see DELDIR 
 DESKTOP=wps_directory|wps_object_ID 
    Points to the WPS directory if the object ID <WP_DESKTOP> is missing 
    in the ini file 
 DIRCMD=default_dir_switches 
    Used to set the default options for the DIR command 
 DOSSETTING.{dossetting}={value} 
    Use the value {value} for the setup string {dossetting} in the next 
    DOS session opended with the <START command. (see Start a program with 
    specific settings for an example; WARP 4 only!). 
 SOURCEPATH=os2_image_directory 
    Points to the disk images used by the OS/2 installation program 
    SYSINST2.EXE 
 SYSTEM_INI=C:\OS2\OS2SYS.INI 
    This statement contains the path & name of the system ini file. 
 TRUEMODE=1 
    Set this environment variable to install the TrapDoor feature of WARP 
    4, even on a machine with SCSI HDs only (WARP 4 only!) 
 USER_INI=C:\OS2\OS2.INI 
    This statement contains the path & name of the user ini file. 
 VIDEO_DEVICES=env_var 
    This statement sets the name of the OS/2 environment variable that 
    contains the base video driver name (Source: The OS/2 WARP Survival 
    Guide). 
 VIO_SVGA=DEVICE(BVHVGA,BVHSVGA) 
    This statement selects the base video support (Source: The OS/2 WARP 
    Survival Guide). 
 WIN3DIR=win311_directory 
    This environment variable must point to the directory with your 
    Windows 3.1 if using the TrapDoor feature of WARP 4 (WARP 4 only!) 
 WP_OBJHANDLE=n 
    This environment variable contains the object handle for the current 
    OS/2 session. This handle is unique for each OS/2 session started via 
    an WPS Object. Note that OS/2 sessions started via the <START command 
    inherit the value from the paren. 
   

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