void    exit(status) int status ;
int     gtty(fildes,argp) int fildes; struct sgttyb *argp ;
int     pkon(fd,size) int fd, size ;
int     pkoff(fd) int fd ;
char    *sbrk(incr) p_int incr ;
void    (*signal(sig,func))() int sig ; void (*func)();
int     stty(fildes,argp) int fildes; struct sgttyb *argp ;
long    tell(fildes) int fildes ;
time_t  time(ptr) time_t *ptr ;
void    cleanup() ;
int     access(name,mode) char *name ; int mode ;
int     acct(file) char *file ;
unsigned alarm(seconds) unsigned seconds ;
int     brk(addr) char *addr ;
int     chdir(dir) char *dir ;
int     chmod(name,mode) char *name ; int mode ;
int     chown(name,owner,group) char *name ; int owner, group ;
int     chroot(dir) char *dir ;
int     close(fildes) int fildes ;
int     creat(name) char *name ;
int     dup(fildes) int fildes ;
int     dup2(fildes,fildes2) int fildes, fildes2 ;
int     execl(name,arg0,...,argn,(char*)0) char *name,*arg0,...,*argn ;
int execl(name,arg0,...,argn,(char*)0,envp) char*name,*arg0,...,*argn,*envp[];
int     execv(name,argv) char *name,*argv[] ;
int     execve(name,argv,envp) char *name,*argv[],*envp[] ;
void    _exit(status) int status ;
int     fork() ;
int     fstat(fildes,buf) int fildes ; struct stat *buf ;
void    ftime(tp) struct timeb *tp ;
int     getegid() ;
int     geteuid() ;
int     getgid() ;
int     getpid() ;
int     getuid() ;
int     ioctl(fildes,request,argp) int fildes, request ; struct sgttyb *buf ;
int     kill(pid,sig) int pid, sig ;
int     link(name1,name2) char *name1, *name2 ;
int     lock(flag) int flag ;
long    lseek(fildes,offset,whence) int fildes, whence ; long offset ;
int     mknod(name,mode,addr) char *name ; int mode, addr ;
int     mount(special,name,rwflag) char *special, *name ; int rwflag ;
int     mpxcall(cmd,vec) int cmd, *vec ;
void    nice(incr) int incr ;
int     open(name,mode) char *name ; int mode ;
void    pause() ;
int     pipe(files) int files[2] ;
void    profil(buff,bufsiz,offset,scale) char *buf; p_int bufsiz,offset,scale;
int     ptrace(request,pid,addr,data) int request, pid, *addr, data ;
unsigned read(fildes,buff,nbytes) int fildes ; char *buff ; unsigned nbytes ;
int     setgid(gid) int gid ;
int     setuid(uid) int uid ;
void    _setsig(functionid) char *functionid ;
int     sigtrp(trapno,signo) int trapno,signo ;
int     stat(name,buf) char *name ; struct stat *buf ;
int     stime(tp) long *tp ;
void    sync() ;
void    times(buffer) struct tbuffer *buffer ;
int     umask(complmode) int complmode ;
int     umount(special) char *special ;
int     unlink(name) char *name ;
int     utime(file,timep) char *file ; time_t *timep ;
int     wait(status) char status[2] ;
unsigned write(fildes,buff,nbytes) int fildes ; char *buff ; unsigned nbytes ;
int     errno ;
