0.9b (c) 1995 Peter Childs
A REXX program called from within the CONFIG.SYS is always called after loading all drivers. So, if you want to use a REXX program to change one or more DEVICE or BASEDEV statements (or a file used by a device driver) in the CONFIG.SYS while booting the workstation, you must use a 2-step-method.
Here's an example: Some time ago a CompuServe forum member said he wanted to change the file PROTOCOL.INI in respect to the input of an user while OS/2 was booting. (PROTOCOL.INI is an ini file used by a device driver necessary for the Network support).
I suggested to call the REXX program below in the CONFIG.SYS for this purpose (see Calling REXX programs in the CONFIG.SYS on how to call a REXX program in the CONFIG.SYS). This program uses a status file and an additional boot process to change the configuration on the fly.
The advantage of this method in contrast with using OS/2's ALT-F1 feature to perform maintenance at bootup:
It runs not only on WARP 3, but also under OS/2 versions prior to WARP; there's no overhead and you only have to maintain one configuration.
/* REXX program which can be called in the CONFIG.SYS to get some */ /* input from the user, check the current configuration against the */ /* user input, and change the configuration and reboot the */ /* workstation with the changed configuration if necessary. */ /* */ /* Note that you can use this method also to change some lines in */ /* your CONFIG.SYS. */ /* Note further, that you can also replace the code to get the user */ /* input with some code to automatically get the needed configuration.*/ /* */ /* You can also use the routine Getkey in programs called in the */ /* CONFIG.SYS. */ /* */ /* (c) 1996 Bernd Schemmer, Germany, EMail: email@example.com */ /* */ /* install an error handler for user breaks */ SIGNAL ON HALT Name UserBreak /* name of the status file for the current boot */ /* process. If this file exists, this is the */ /* second boot, if not it's the first. */ statusFile = "C:\BOOTSEM" if stream( statusFile, "c", "QUERY EXISTS" ) = "" then do /* first boot */ /* load the necessary REXXUTIL function(s). Note */ /* that you CANNOT use SysLoadFuncs!!! */ call rxFuncAdd "SysGetKey", "REXXUTIL", "SysGetKey" /* get the user input */ call CharOut, "Which PROTOCOL.INI do you want? Press A or B ->> " do forever userInput = translate( SysGetKey( "NOECHO" ) ) if UserInput = "A" | UserInput = "B" then leave else /* invalid user response - ring the bell */ call CharOut , "07"x end /* do forever */ call LineOut , UserInput /* check the configuration, in this example: */ /* check if the existing PROTOCOL.INI is correct */ call LineOut , "Checking the configuration. Please wait ..." /* ... insert the code to check the configuration ... */ /* set ConfigurationOK to 1 if PROTOCOL.INI is okay */ if ConfigurationOK = 1 then do /* the current configuration is okay */ /* continue with the boot process */ call LineOut, "The current configuration is okay." , "Boot process continues ..." end /* if ConfigurationOK = 1 then */ else do /* the current configuration is NOT okay */ call LineOut, "The current configuration is NOT okay." , "Now changing the configuration ..." /* correct the configuration, in this example: */ /* replace the PROTOCOL.INI */ /* ... insert the code to change the configuration ...*/ /* now create the status file */ call LineOut statusFile, "We need a second boot ..." /* close the status file */ call stream statusFile, "c", "CLOSE" call LineOut, "Rebooting your workstation please wait ..." /* and reboot the workstation using SETBOOT */ "SETBOOT /IBD:C" end /* else */ end /* if stream( statusFile, "c", "QUERY EXISTS" ) = "" then */ else do /* second boot */ /* normally nothing to do because the */ /* configuration should now be okay */ end /* else */ /* delete the status file also on user breaks */ UserBreak: /* delete the status file if it exists */ if stream( statusFile, "c", "QUERY EXISTS" ) <> "" then "@del " statusFile "2>NUL 1>NUL"
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