📄 halt.c
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#include <stdio.h>
#include "filesys.h"
halt()
{
struct inode * inode;
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(user[i].u_ofile[j]);
user[i].u_ofile[j]=SYSOPENFILE+1;
}
}
}
}
/* 3. write back the filesys to the disk */
fseek (fd,BLOCKSIZ,SEEK_SET);
fwrite(&filsys,1,sizeof(struct filsys),fd);
/* 4. close the file system column */
fclose(fd);
/* 5.say GOOD BYE to all the user */
printf("\nGood Bye.See You Next Time.Please turn off the switch\n");
exit(0);
}
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