diff --git a/kernel/sys.c b/kernel/sys.c
new file mode 100644
index 0000000..ff74205
--- /dev/null
+++ b/kernel/sys.c
@@ -0,0 +1,371 @@
+/*
+ *  linux/kernel/sys.c
+ *
+ *  (C) 1991  Linus Torvalds
+ */
+
+#include <errno.h>
+
+#include <linux/sched.h>
+#include <linux/tty.h>
+#include <linux/kernel.h>
+#include <asm/segment.h>
+#include <sys/times.h>
+#include <sys/utsname.h>
+int sys_ftime()
+{
+	return -ENOSYS;
+}
+
+int sys_break()
+{
+	return -ENOSYS;
+}
+
+int sys_ptrace()
+{
+	return -ENOSYS;
+}
+
+int sys_stty()
+{
+	return -ENOSYS;
+}
+
+int sys_gtty()
+{
+	return -ENOSYS;
+}
+
+int sys_rename()
+{
+	return -ENOSYS;
+}
+
+int sys_prof()
+{
+	return -ENOSYS;
+}
+
+int sys_setregid(int rgid, int egid)
+{
+	if (rgid>0) {
+		if ((current->gid == rgid) || 
+		    suser())
+			current->gid = rgid;
+		else
+			return(-EPERM);
+	}
+	if (egid>0) {
+		if ((current->gid == egid) ||
+		    (current->egid == egid) ||
+		    suser()) {
+			current->egid = egid;
+			current->sgid = egid;
+		} else
+			return(-EPERM);
+	}
+	return 0;
+}
+
+int sys_setgid(int gid)
+{
+/*	return(sys_setregid(gid, gid)); */
+	if (suser())
+		current->gid = current->egid = current->sgid = gid;
+	else if ((gid == current->gid) || (gid == current->sgid))
+		current->egid = gid;
+	else
+		return -EPERM;
+	return 0;
+}
+
+int sys_acct()
+{
+	return -ENOSYS;
+}
+
+int sys_phys()
+{
+	return -ENOSYS;
+}
+
+int sys_lock()
+{
+	return -ENOSYS;
+}
+
+int sys_mpx()
+{
+	return -ENOSYS;
+}
+
+int sys_ulimit()
+{
+	return -ENOSYS;
+}
+
+int sys_time(long * tloc)
+{
+	int i;
+
+	i = CURRENT_TIME;
+	if (tloc) {
+		verify_area(tloc,4);
+		put_fs_long(i,(unsigned long *)tloc);
+	}
+	return i;
+}
+
+/*
+ * Unprivileged users may change the real user id to the effective uid
+ * or vice versa.
+ */
+int sys_setreuid(int ruid, int euid)
+{
+	int old_ruid = current->uid;
+	
+	if (ruid>0) {
+		if ((current->euid==ruid) ||
+                    (old_ruid == ruid) ||
+		    suser())
+			current->uid = ruid;
+		else
+			return(-EPERM);
+	}
+	if (euid>0) {
+		if ((old_ruid == euid) ||
+                    (current->euid == euid) ||
+		    suser()) {
+			current->euid = euid;
+			current->suid = euid;
+		} else {
+			current->uid = old_ruid;
+			return(-EPERM);
+		}
+	}
+	return 0;
+}
+
+int sys_setuid(int uid)
+{
+/*	return(sys_setreuid(uid, uid)); */
+	if (suser())
+		current->uid = current->euid = current->suid = uid;
+	else if ((uid == current->uid) || (uid == current->suid))
+		current->euid = uid;
+	else
+		return -EPERM;
+	return(0);
+}
+
+int sys_stime(long * tptr)
+{
+	if (!suser())
+		return -EPERM;
+	startup_time = get_fs_long((unsigned long *)tptr) - jiffies/HZ;
+	return 0;
+}
+
+int sys_times(struct tms * tbuf)
+{
+	if (tbuf) {
+		verify_area(tbuf,sizeof *tbuf);
+		put_fs_long(current->utime,(unsigned long *)&tbuf->tms_utime);
+		put_fs_long(current->stime,(unsigned long *)&tbuf->tms_stime);
+		put_fs_long(current->cutime,(unsigned long *)&tbuf->tms_cutime);
+		put_fs_long(current->cstime,(unsigned long *)&tbuf->tms_cstime);
+	}
+	return jiffies;
+}
+
+int sys_brk(unsigned long end_data_seg)
+{
+	if (end_data_seg >= current->end_code &&
+	    end_data_seg < current->start_stack - 16384)
+		current->brk = end_data_seg;
+	return current->brk;
+}
+
+/*
+ * This needs some heave checking ...
+ * I just haven't get the stomach for it. I also don't fully
+ * understand sessions/pgrp etc. Let somebody who does explain it.
+ */
+int sys_setpgid(int pid, int pgid)
+{
+	int i;
+
+	if (!pid)
+		pid = current->pid;
+	if (!pgid)
+		pgid = current->pid;
+	for (i=0 ; i<NR_TASKS ; i++)
+		if (task[i] && task[i]->pid==pid) {
+			if (task[i]->leader)
+				return -EPERM;
+			if (task[i]->session != current->session)
+				return -EPERM;
+			task[i]->pgrp = pgid;
+			return 0;
+		}
+	return -ESRCH;
+}
+
+int sys_getpgrp(void)
+{
+	return current->pgrp;
+}
+
+int sys_setsid(void)
+{
+	if (current->leader && !suser())
+		return -EPERM;
+	current->leader = 1;
+	current->session = current->pgrp = current->pid;
+	current->tty = -1;
+	return current->pgrp;
+}
+
+int sys_getgroups()
+{
+	return -ENOSYS;
+}
+
+int sys_setgroups()
+{
+	return -ENOSYS;
+}
+
+int sys_uname(struct utsname * name)
+{
+	static struct utsname thisname = {
+		"linux .0","nodename","release ","version ","machine "
+	};
+	int i;
+
+	if (!name) return -ERROR;
+	verify_area(name,sizeof *name);
+	for(i=0;i<sizeof *name;i++)
+		put_fs_byte(((char *) &thisname)[i],i+(char *) name);
+	return 0;
+}
+
+int sys_sethostname()
+{
+	return -ENOSYS;
+}
+
+int sys_getrlimit()
+{
+	return -ENOSYS;
+}
+
+int sys_setrlimit()
+{
+	return -ENOSYS;
+}
+
+int sys_getrusage()
+{
+	return -ENOSYS;
+}
+
+int sys_gettimeofday()
+{
+	return -ENOSYS;
+}
+
+int sys_settimeofday()
+{
+	return -ENOSYS;
+}
+int sys_umask(int mask)
+{
+	int old = current->umask;
+
+	current->umask = mask & 0777;
+	return (old);
+}
+
+
+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;
+}
+int sys_getdents(unsigned int fd,struct linux_dirent *dirp,unsigned int count)
+{
+	struct buffer_head *bh;
+	struct m_inode*inode=current->filp[fd]->f_inode;
+	struct linux_dirent m;
+	struct dir_entry *dir;
+	char *buf;
+	int k,n=0,i;
+	if(count<=0)return -1;
+	bh=bread(inode->i_dev,inode->i_zone[0]);
+	for(k=0;k<inode->i_size;k+=sizeof(struct linux_dirent))
+	{
+		if(n+sizeof(struct linux_dirent)>count)return 0;
+		dir=(struct dir_entry*)(bh->b_data+k);
+		if(dir->inode)
+		{
+			m.d_ino=dir->inode;
+			for(i=0;i<NAME_LEN;i++)m.d_name[i]=dir->name[i];
+			m.d_off=0;
+			m.d_reclen=sizeof(struct linux_dirent);
+			buf=&m;
+			for(i=0;i<m.d_reclen;i++)
+			put_fs_byte(*(buf+i),(char*)(dirp)+n+i);
+			n+=sizeof(struct linux_dirent);
+		}
+		else continue;
+	}
+	brelse(bh);
+	return n;
+}
+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_getpipe2()
+{
+	return 0;
+}
\ No newline at end of file