help on using pseudo terminals - using /dev/ptmx

["C K Kashyap" <ckkashyap@gmail.com>]

Hi all,

I recently ran into trouble with pseudo terminals while trying to make
nxterm(microwindows or nano X) work.

Could someone please help me out with the program below...where I am
trying to do a two way communication between parent and child using
pseudo-terminal.


#include <pty.h>
#include <utmp.h>
#include <fcntl.h>
#include <stdio.h>


int main(){
 int amaster,aslave;
 char name[256];
 char buffer[20];



 openpty(&amaster,&aslave,name,NULL,NULL);
   fcntl (amaster, F_SETFL, O_NONBLOCK);
   fcntl (aslave, F_SETFL, O_NONBLOCK);



 printf("Master = %d, Slave = %d\n",amaster,aslave);
 printf("NAME %s\n",name);

 if(fork()==0){
   //login_tty(aslave);
   read(aslave,buffer,10);
   printf("Child: %s\n",buffer);
   write(aslave,"ABCDEFGHIJ\n",11);
   sleep(5);
   exit(0);

 }
 //  login_tty(amaster);
 write(amaster,"1234567890\n",11);
 read(amaster,buffer,10);
 printf("Parent: %s\n",buffer);

 sleep(5);
}



--
Regards,
Kashyap
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