From: "Grzegorz Jablonski" <gwj AT dmcs DOT p DOT lodz DOT pl>
Newsgroups: comp.os.msdos.djgpp
Subject: BUG - Exec does not free memory
Date: Sat, 12 Jun 1999 14:56:52 +0200
Organization: LODMAN - Metropolitan Area Network in LODZ
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

When the program below (run as parent.exe 0) is run, it eventually allocates
all the dos memory and quits. Similar program compiled with Borland C 3.1
works correctly. I suspect that the problem is probably with the transfer
buffer, which is not freed after exec. The problem occured, when I tried to
upgrade the program version from within the program itself.

#include "stdio.h"
#include "stdlib.h"
#include "conio.h"
#include "process.h"
#include "malloc.h"
#include "string.h"
#include <go32.h>

main(int argc, char *argv[])

{
   char tbuf[256],a;
   int i=0;
   unsigned long mlen;

   i=atoi(argv[1]);

   printf("Call %d, PSP:
%lx\n",i,_go32_info_block.linear_address_of_original_psp);
   sprintf(tbuf,"%d",i+1);
   a=getch();
   if(a=='q')
      return 1;
   execlp("parent.exe","parent.exe",tbuf,NULL);
   printf("after exec\n");
}

Grzegorz Jablonski
gwj AT dmcs DOT p DOT lodz DOT pl