ananth@eng.umd.edu (Sekhar C. Ananthakrishnan) (10/12/90)
Hi Netters,
I have a problem with a piece of code I am trying to write and I was
not able to get any ideas from books. So, I am posting it hoping that
someone could help me.
I have a "client" program which has a piece of code
similar to the following.....
.
.
printf("Enter value for X");
scanf("%d",&X);
printf("Enter value for Y");
scanf("%d",&Y);
printf("The final value is %d\n", X+Y);
.
.
I want to write another program say "handler", which forks client as a
child process, read the printf statements and supply values for the
scanf statements using "read" and "write". I do not want to change the
printf and scanf statements in the client to "read" and "write". How
do I synchronize the exchange between the shell and the client?
I want the handler program to do the following.
read(0, buff, 256);
/* at this point buff should contain "Enter value for X". */
/* parse "Enter value for X" and give a value for X*/
write(1,reply,strlen(reply)); /* where reply is a buffer containing
value for X)*/
read(0,buff,256)
and so on. Could somebody tell me how it could be done? If there is an
easy solution, I would appreciate if somebody can E-mail me on how it
could be done. Thanks in advance.
shyam
ananth@mordor.eng.umd.edu