(*$Foreign language module *)
DEFINITION MODULE Unix;
(*
  Module:	interface to some Unix systemcalls
  Author:	Ceriel J.H. Jacobs
  Version:	$Header$
*)
  FROM SYSTEM IMPORT WORD, ADDRESS;

(* Type needed for Signal *)
  TYPE SignalPrc = PROCEDURE(INTEGER):INTEGER;
  CONST
	SIGDFL = SignalPrc(NIL);
	SIGIGN = SignalPrc(NIL+1);
	ILLBREAK = ADDRESS(NIL-1);

  VAR errno: INTEGER;
(* Possible values of errno: *)
  CONST
	EPERM = 1;	(* Not owner *)
	ENOENT = 2;	(* No such file or directory *)
	ESRCH = 3;	(* No such process *)
	EINTR = 4;	(* Interrupted system call *)
	EIO = 5;	(* I/O error *)
	ENXIO = 6;	(* No such device or address *)
	E2BIG = 7;	(* Arg list too long *)
	ENOEXEC = 8;	(* Exec format error *)
	EBADF = 9;	(* Bad file number *)
	ECHILD = 10;	(* No child processes *)
	EAGAIN = 11;	(* No more processes *)
	ENOMEM = 12;	(* Not enough space *)
	EACCES = 13;	(* Permission denied *)
	EFAULT = 14;	(* Bad address *)
	ENOTBLK = 15;	(* Block device required *)
	EBUSY = 16;	(* Mount device busy *)
	EEXIST = 17;	(* File exists *)
	EXDEV = 18;	(* Cross-device link *)
	ENODEV = 19;	(* No such device *)
	ENOTDIR = 20;	(* Not a directory *)
	EISDIR = 21;	(* Is a directory *)
	EINVAL = 22;	(* Invalid argument *)
	ENFILE = 23;	(* File table overflow *)
	EMFILE = 24;	(* Too many open files *)
	ENOTTY = 25;	(* Not a typewriter *)
	ETXTBSY = 26;	(* Text file busy *)
	EFBIG = 27;	(* File too large *)
	ENOSPC = 28;	(* No space left on device *)
	ESPIPE = 29;	(* Illegal seek *)
	EROFS = 30;	(* Read-only file system *)
	EMLINK = 31;	(* Too many links *)
	EPIPE = 32;	(* Broken pipe *)
	EDOM = 33;	(* Math argument *)
	ERANGE = 34;	(* Result too large *)

  PROCEDURE access(path: ADDRESS; amode : INTEGER) : INTEGER;
  PROCEDURE acct(path: ADDRESS) : INTEGER;
  PROCEDURE alarm(sec: CARDINAL) : CARDINAL;
  PROCEDURE brk(endds: ADDRESS) : INTEGER;
  PROCEDURE sbrk(incr: INTEGER) : ADDRESS;
  PROCEDURE chdir(path: ADDRESS) : INTEGER;
  PROCEDURE chmod(path: ADDRESS; mode: INTEGER) : INTEGER;
  PROCEDURE chown(path: ADDRESS; owner, group: INTEGER) : INTEGER;
  PROCEDURE chroot(path: ADDRESS) : INTEGER;
  PROCEDURE close(fildes: INTEGER) : INTEGER;
  PROCEDURE creat(path: ADDRESS; 
  		  mode: INTEGER) : INTEGER;
  PROCEDURE dup(fildes: INTEGER) : INTEGER;
  PROCEDURE execve(path: ADDRESS;
		   argv: ADDRESS;
		   envp: ADDRESS) : INTEGER;
  PROCEDURE exit(status: INTEGER);
  (* Sys5 *) PROCEDURE fcntl(fildes, request, arg: INTEGER) : INTEGER;
  PROCEDURE ftime(bufp:ADDRESS) : INTEGER;
  PROCEDURE fork() : INTEGER;
  PROCEDURE getpid() : INTEGER;
  PROCEDURE getppid() : INTEGER;
  PROCEDURE getuid() : INTEGER;
  PROCEDURE geteuid() : INTEGER;
  PROCEDURE getgid() : INTEGER;
  PROCEDURE getegid() : INTEGER;
  PROCEDURE ioctl(fildes, request: INTEGER; arg: ADDRESS) : INTEGER;
  PROCEDURE stty(fildes: INTEGER; buf: ADDRESS) : INTEGER;
  PROCEDURE gtty(fildes: INTEGER; buf: ADDRESS) : INTEGER;
  PROCEDURE kill(pid, sig: INTEGER) : INTEGER;
  PROCEDURE link(path1, path2: ADDRESS) : INTEGER;
  PROCEDURE lseek(fildes: INTEGER; offset: LONGINT; whence: INTEGER) : LONGINT;
  PROCEDURE mknod(path: ADDRESS; mode, dev: INTEGER) : INTEGER;
  PROCEDURE mount(spec, dir: ADDRESS; rwflag: INTEGER) : INTEGER;
  PROCEDURE nice(incr: INTEGER) : INTEGER;
  PROCEDURE open(path: ADDRESS; oflag: INTEGER) : INTEGER;
  PROCEDURE pause();
  PROCEDURE pipe(fildes: ADDRESS) : INTEGER;
  PROCEDURE profil(buff: ADDRESS;
		   bufsiz, offset, scale: INTEGER);
  PROCEDURE ptrace(request, pid, addr, data: WORD) : INTEGER;
  PROCEDURE read(fildes: INTEGER;
		 buf: ADDRESS;
		 nbyte: CARDINAL) : INTEGER;
  PROCEDURE setuid(uid: INTEGER) : INTEGER;
  PROCEDURE setgid(gid: INTEGER) : INTEGER;
  PROCEDURE signal(sig: INTEGER;
		   func: SignalPrc;
		   VAR oldfunc: SignalPrc) : INTEGER;
  PROCEDURE sigtrp(trapno, signo: INTEGER) : INTEGER;
  (* Let Unix signal signo cause EM trap trapno to occur *)
  PROCEDURE stat(path: ADDRESS; statbuf: ADDRESS) : INTEGER;
  PROCEDURE fstat(fildes: INTEGER; statbuf: ADDRESS) : INTEGER;
  PROCEDURE stime(t: LONGINT) : INTEGER;
  PROCEDURE sync();
  PROCEDURE time(tloc: ADDRESS) : LONGINT;
  PROCEDURE times(buffer: ADDRESS) : LONGINT;
  PROCEDURE umask(cmask: INTEGER) : INTEGER;
  PROCEDURE umount(spec: ADDRESS) : INTEGER;
  PROCEDURE unlink(path: ADDRESS) : INTEGER;
  PROCEDURE utime(path: ADDRESS; times: ADDRESS) : INTEGER;
  PROCEDURE wait(VAR statloc: INTEGER): INTEGER;
  PROCEDURE write(fildes: INTEGER;
		  buf: ADDRESS;
		  nbyte: CARDINAL) : INTEGER;
END Unix.
