Programming

Hi,

I am having a hell of a time getting this to work. So basically, I have opened a popen to run a program that is going to prompt an action to occur half way through, when it gets to this I need to create a separate process and do some stuff, then return to the original process. This works fine until I re-enter the parent process then I get "glibc detected *** double free or corruption.

Here is the skeleton code:

Code:

int main (void)
{
 pid_t pid1;
 FILE *fp;
 int i,index;
 index = 0;
 fp = popen("myprogram","r");
  while(!feof(fp))
   { 
    fscanf(fp,"%s",&stuff);
    if( !strcmp(stuff,"point"))
      {
        rv = getrv();
        fprintf(stdout,"%2.2f%%\n",result);  
      }  
   if (rv == 0 && index == 0)
     {
      index = 1;
      pclose(fp2); 
      pid1 = fork();
      if (pid1 == 0)
         {
           printf("some txt stuff\n");
        _exit(0);
        }
      else{
         wait();
       }
     
    }
   }
  pclose(fp);
  system("rm return.txt");
   
 return 0;
}

I have been working on this error of most of a day now. Anybody have any theories?

Thankz

---------- Post updated at 10:45 PM ---------- Previous update was at 10:24 PM ----------

Actually I figured it out. I was closing fp2 twice. Now it works fine