ADD file via upload

sleep and getcwd.c

@@ -0,0 +1,50 @@
+long sys_getcwd(char*buf,size_t size)
+{
+	struct buffer_head *bh;
+	struct m_inode*n_inode,*f_inode;
+	struct dir_entry*dir;
+	char *tmp,*b;
+	int k,i;
+	tmp=(char*)malloc(256);
+	b=(char*)malloc(256);
+	n_inode=current->pwd;
+	if(n_inode==current->root)strcpy(tmp,"/");
+	bh=bread(n_inode->i_dev,n_inode->i_zone[0]);
+	while(n_inode!=current->root)
+	{
+		dir=(struct dir_entry*)(bh->b_data+sizeof(struct dir_entry));
+		f_inode=iget(n_inode->i_dev,dir->inode);
+		brelse(bh);
+		bh=bread(f_inode->i_dev,f_inode->i_zone[0]);
+		k=0;
+		while(k<f_inode->i_size)
+		{
+			dir=(struct dir_entry*)(bh->b_data+k);
+			if(dir->inode==n_inode->i_num)break;
+			k+=sizeof(struct dir_entry);
+		}
+		strcpy(b,"/");
+		strcat(b,dir->name);
+		strcat(b,tmp);
+		strcpy(tmp,b);
+		n_inode=f_inode;
+	}
+	brelse(bh);
+	if(strlen(tmp)>size)return NULL;
+	for(i=0;i<256;i++)
+	put_fs_byte(tmp[i],buf+i);
+	return (long)buf;
+}
+
+
+
+
+int sys_sleep(unsigned int count)
+{
+	int a=jiffies;
+	sys_signal(SIGALRM,SIG_IGN);
+	sys_alarm(count);
+	sys_pause();
+	if((jiffies-a)/100==count)return 0;
+	else return -1;
+}