/*******************************************************************************/

/* 	msqServer.cpp -- The server process
 *      The server process for jg162.cc (client processs)
 *	John Gray, Inrerprocess Communications in UNIX,  P.163
 */
#include 	"local6.h"

int main(int argc, char *argv[]) {

  int	   	mid, n;
  MESSAGE 	msg;
  void	process_msg(char *, int);

  if (argc != 3) {
    fprintf(stderr, "Usage: %s msg_id  &\n", argv[0]);
    exit(1);
  }

  mid = atoi(argv[1]);  /* message queue ID via cmd line */

   
  while (1) {		
    if ((n=msgrcv(mid, &msg, sizeof(msg), SERVER, 0)) == -1) {
      perror("Server: msgrcv");
      exit(2);
    }
    else if (n == 0)	/* client is done */
      break;
      else{
	process_msg(msg.buffer, strlen(msg.buffer));
	msg.msg_to = msg.msg_fm;  /* swap to <> from info*/
	msg.msg_fm = SERVER;
	if (msgsnd(mid, &msg, sizeof(msg), 0 ) == -1) {
	  perror("Server: msgsnd");
	  exit(3);
        }
      }
     
  }
  msgctl(mid,IPC_RMID, (struct msqid_ds  *) 0);
  exit(0);
}

 /* Conver lower case alphabetics to upper case */

void
process_msg(char *b, int len) {
  int	i;
  for(i =0; i < len; ++i)
    if(isalpha(* (b + i)))
      *(b+i) = toupper(*(b+i));
}