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Annotation of 43BSD/ingres/source/ctlmod/readmon.c, revision 1.1.1.1

1.1       root        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: }

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