# include	"ctlmod.h"
# include	"pipes.h"
# include	<sccs.h>

SCCSID(@(#)pb_flush.c	8.1	12/31/84)

/*
**  PB_FLUSH -- flush a pipe buffer
**
**	This routine insures that all the data in a pipe buffer
**	is flushed out to the pipe.
**
**	We also handle input switching in this routine.  If the
**	message we are writing is not merely informational (such
**	as an error message, or some sort of meta message), we
**	change the input to be whatever pipe the named process
**	will write back on.
**
**	Parameters:
**		ppb -- a ptr to the pipe buffer to flush.
**
**	Returns:
**		none
**
**	Side Effects:
**		none
**
**	Trace Flags:
**		none
*/

pb_flush(ppb)
register pb_t	*ppb;
{
	/* mark this as an EOF block and flush the buffer */
	ppb->pb_stat |= PB_EOF;
	pb_write(ppb);
}