#include <stdlib.h>

#include <signal.h>

#include <unistd.h>

#include <string.h>

#include <sys/types.h>

#include <errno.h>

#include "globals.h"

#include <fcntl.h>

#include <sys/mman.h>

#include <sys/wait.h>

#include <stdio.h>

int buf_index;

void in_die(int signal) {

exit(0);

}

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

{

/*Set up some Variables*/

int parent_PCB_id = argc;

int fid;

caddr_t mmap_ptr;

inputbuf *in_mem_p;

char c[MAX_CHAR];

// If parent tells us to terminate, then clean up first

sigset(SIGINT,in_die);

//Gets id of parents (to signal) and the file id of mmap.

sscanf(argv[1], "%d", &parent_PCB_id);

sscanf(argv[2], "%d", &kfid );

kmmap_ptr =

mmap((caddr_t) 0,

bufsize,

PROT_READ | PROT_WRITE,

MAP_SHARED,

kfid,

(off_t) 0);

if (kmmap_ptr == MAP_FAILED){

printf("Child memory map has failed, KB is aborting! Error <%s> ...\n", strerror(errno));

in_die(0);

}

in_mem_p = (inputbuf *) kmmap_ptr;

buf_index = 0;

in_mem_p->flag = MEM_EMPTY; // Set the flag to “Buffer Empty”

do {

fgets(c, MAX_CHAR, stdin); // This only returns when <cr> is pressed

strcpy(in_mem_p->data, c); // Read in data from buffer

in_mem_p->flag = MEM_FULL; // Set the flag

kill(parent_PCB_id ,SIGUSR1); // Signal the parent

buf_index = 0;

while(in_mem_p->flag == MEM_FULL){

usleep(100000); // Sleep until the RTX has read the data

}

} while(1); // Loops Forever

}