4.3BSD - /usr/ingres/source/ctlmod/readmon.c

   1: # include   "ctlmod.h"
   2: # include   "pipes.h"
   3: # include   <sccs.h>
   4: 
   5: SCCSID(@(#)readmon.c	8.1	12/31/84)
   6: 
   7: /*
   8: **  READMON -- Read bytes from tty monitor
   9: **
  10: **	This routine is a cludge.  It will exist only in version
  11: **	6.3 with split monitor/parser.  The purpose is to get
  12: **	around the problem caused by the monitor not outputting
  13: **	text in one of the basic internal data types.  What it
  14: **	can do is to output no parameters & terminate with a
  15: **	PV_EOF.  This doesn't flush the pipe, so it can continue
  16: **	with plain text.  This routine retrieves that text.
  17: **	The name "readmon" is somewhat of a misnomer -- it is
  18: **	not restricted to the monitor, & does not necessarily
  19: **	read from the monitor; but this routine should only
  20: **	be called from the parser on the monitor pipe.
  21: **
  22: **	Parameters:
  23: **		buf -- a buffer to read into.
  24: **		nbytes -- the max number of bytes to read.
  25: **
  26: **	Returns:
  27: **		The actual number of bytes read.
  28: **		zero on eof.
  29: **
  30: **	Side Effects:
  31: **		none.
  32: **
  33: **	NOTE:
  34: **		When this routine is eliminated, so should the
  35: **		'cm_monppb' field of the Cm struct and the code
  36: **		in proc_err to flush the monitor input pipe.
  37: **
  38: **	Trace Flags:
  39: **		none.
  40: */
  41: 
  42: pb_t    *MonPpb;    /* pointer to ppb for monitor */
  43: 
  44: readmon(buf, nbytes)
  45: char    *buf;
  46: int nbytes;
  47: {
  48:     Cm.cm_input = Cm.cm_rinput;
  49:     return (pb_get(MonPpb, buf, nbytes));
  50: }

Defined functions

Defined variables