halt.cpp

#include <stdio.h>
#include <string.h>
#include "filesys.h"

void halt(){
	int i,j;

	/*1. write back the current dir */ 
	chdir("..");
	iput(cur_path_inode);

	/*2. free the u_ofile and sys_ofile and inode*/ 
	for(i=0; i<USERNUM; i++){
		if(user[i].u_uid != 0){
			for(j=0; j<NOFILE;j++){
				if(user[i].u_ofile[j] != SYSOPENFILE + 1){
					close(i,j);
					user[i].u_ofile[j] = SYSOPENFILE + 1;
				}//if
			}//for
		}//if
	}//for

	/*3. write back the filesys to the disk*/
	memcpy(disk+BLOCKSIZ, &filsys, sizeof(struct filsys));

	/*4. close the file system column*/

	/*5. say GOOD BYE to all the user*/
	printf("\nGood Bye. See You Next Time. Please turn off the switch\n");
	exit(0);
}