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From: catone@dsl.cis.upenn.edu (Tony Catone)
Newsgroups: comp.sys.ibm.pc
Subject: Re: batch files calling batch files
Message-ID: <1127@super.upenn.edu.upenn.edu>
Date: Mon, 4-May-87 12:06:51 EDT
Article-I.D.: super.1127
Posted: Mon May  4 12:06:51 1987
Date-Received: Tue, 5-May-87 01:46:49 EDT
References: <626@cod.UUCP> <1651@nicmad.UUCP>
Sender: root@super.upenn.edu.upenn.edu
Reply-To: catone@dsl.cis.upenn.edu.UUCP (Tony Catone)
Organization: University of Pennsylvania
Lines: 26
Keywords: command.com, exec, dos

In article <1651@nicmad.UUCP> brown@nicmad.UUCP (Mr. Video) writes:
>In article <626@cod.UUCP> rupp@cod.UUCP (William L. Rupp) writes:
><Some while back there was a discussion of how to write a batch file that
><would call other batch files and then return control to the original
><batchfile ...
>
>PC-DOS 3.30 now supports a batch command called CALL.  After call is
>done, control is returned to the calling batch program.
>
>I have not tested PC-DOS 3.21 to see if CALL is there already.  Who knows,
>maybe it is there and is one of the unsupported commands.

An earlier method to accomplish this task was to use a second copy of
command.com, passing it the name of the subroutine batch file.  I.e.,
your main batch file would contain a line like command /c batch2.
Batch2 would then be executed, and upon completion control returns to
your main batch file.  The /c parameter is necessary to tell
command.com to remove itself from memory after the program passed it
on the command line is completed.  I believe this method works on DOS
version 2.x and above.  This should look very familiar to any who have
used DOS's exec function to push to a new shell from within their own
application programs (just got this to work in Turbo Pascal, yea!).

					- Tony
					  catone@dsl.cis.upenn.edu
					  catone@wharton.upenn.edu