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1 files changed, 147 insertions, 0 deletions

diff --git a/sys/fio/fstati.x b/sys/fio/fstati.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<mach.h>
+include	<config.h>
+include	<fset.h>
+include	<fio.h>
+
+# FSTATI -- Get information on the status and characteristics of an open
+# file.  Returns an integer value.  See also FSTATL and FSTATS (for long
+# integer and string status values).
+
+int procedure fstati (fd, what)
+
+int	fd				#I file descriptor
+int	what				#I parameter to be returned
+
+pointer	ffp, pb, pbtop
+int	flag, ffd, nchars, seglen, iomode
+int	and(), btoi()
+bool	envgetb()
+long	ffilsz()
+include	<fio.com>
+
+begin
+	ffp = fiodes[fd]
+
+	switch (what) {
+	case F_ASYNC:
+	    return (NO)				# async i/o not implemented
+	case F_BLKSIZE:
+	    return (FBLKSIZE(ffp))
+	case F_BUFPTR:
+	    return (bufptr[fd])
+	case F_BUFSIZE:
+	    return (FBUFSIZE(ffp))
+	case F_BUFTYPE:
+	    return (F_LOCAL)			# global bufs not implemented
+	case F_FILESIZE:
+	    FILSIZE(ffp) = ffilsz(fd)
+	    return (FILSIZE(ffp))
+	case F_FIRSTBUFOFF:
+	    return (FIRSTBUFOFF(ffp))
+	case F_CHANNEL:
+	    return (FCHAN(ffp))
+	case F_CLOBBER:
+	    return (btoi (envgetb ("clobber")))
+	case F_CLOSEFD:
+	    return (FCLOSEFD(ffp))
+	case F_DEVCODE:
+	    return (FDEV(ffp))
+	case F_DEVICE:
+	    return (zdev[FDEV(ffp)])
+
+	case F_EOF:
+	    if (FILSIZE(ffp) < 0 || LNOTE(fd) < ffilsz (fd))
+		return (NO)
+	    else
+		return (YES)
+
+	case F_FILEWAIT:
+	    return (btoi (envgetb ("filewait")))
+	case F_FIODES:
+	    return (ffp)
+	case F_FLUSHNL:
+	    flag = FF_FLUSHNL
+	case F_IOMODE:
+	    iomode = 0
+	    if (and (fflags[fd], FF_RAW) != 0)
+		iomode = iomode + IO_RAW
+	    if (and (fflags[fd], FF_NDELAY) != 0)
+		iomode = iomode + IO_NDELAY
+	    return (iomode)
+	case F_KEEP:
+	    flag = FF_KEEP
+
+	case F_LASTREFFILE:
+	    # Return FD of last active file, i.e., the file on which i/o was
+	    # most recently done (or on which i/o is in progress).  FIO sets
+	    # "fp" in fio.com whenever a file operation takes place.
+
+	    for (ffd=1;  ffd <= LAST_FD;  ffd=ffd+1)
+		if (fiodes[ffd] != NULL && fiodes[ffd] == fp)
+		    return (ffd)
+	    return (NULL)
+
+	case F_MODE:
+	    return (FMODE(ffp))
+
+	case F_NBUFS:
+	    if (bufptr[fd] == NULL)
+		return (0)
+	    else
+		return (FNBUFS(ffp))
+
+	case F_NCHARS:
+	    return (FNCHARS(ffp))
+	case F_ONEVERSION:
+	    return (btoi (envgetb ("multversions")))
+	case F_OPEN:
+	    return (YES)
+	case F_OPTBUFSIZE:
+	    return (FOPTBUFSIZE(ffp))
+	case F_RAW:
+	    flag = FF_RAW
+	case F_READ:
+	    flag = FF_READ
+
+	case F_REDIR:
+	    if (redir_fd[fd] != 0)
+		return (YES)
+	    else
+		return (NO)
+
+	case F_SZBBLK:
+	    return (FNBYTES(ffp))
+	case F_TYPE:
+	    return (FTYPE(ffp))
+	case F_WRITE:
+	    flag = FF_WRITE
+	case F_MAXBUFSIZE:
+	    return (FMAXBUFSIZE(ffp))
+
+	case F_UNREAD:
+	    UPDATE_IOP(fd)
+	    if (iop[fd] < bufptr[fd] || iop[fd] >= itop[fd])
+		nchars = 0
+	    else
+		nchars = itop[fd] - iop[fd]
+	    if (and (FF_PUSHBACK, fflags[fd]) != 0) {
+		pbtop = (FPBTOP(ffp) - 1) / SZ_INT + 1
+		for (pb=FPBSP(ffp);  pb < pbtop;  pb=pb+4) {
+		    seglen = Memi[pb+1] - Memi[pb]
+		    if (seglen > 0)
+			nchars = nchars + seglen
+		}
+	    }
+	    return (nchars)
+
+	default:
+	    return (ERR)
+	}
+
+	if (and (flag, fflags[fd]) != 0)		# test a flag bit
+	    return (YES)
+	else
+	    return (NO)
+end