#include <errno.h>#include <fcntl.h>#include <sys/types.h>#include <utime.h>#include <sys/stat.h>#include <string.h>#include <linux/sched.h>#include <linux/tty.h>#include <linux/kernel.h>#include <asm/segment.h>char myname[21];int sys_iam(const char * name){	char c;	int size,i;	for(i=0;i<21;i++)		myname[i]='\0';	for(size=0;(c=get_fs_byte(name+size))!='\0';size++){		if(size>=20)			return -EINVAL;		else                	myname[size]=c;	}	myname[size]='\0';	return size;}int sys_whoami(char * name,unsigned int size){	int i=0;	while(myname[i]!='\0'){		put_fs_byte(myname[i],name+i);		i++;		if(i>20)			return -EINVAL;	}	return i;}