From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Sat, 16 Sep 1995 10:53:02 -0400
From: presotto@plan9.att.com presotto@plan9.att.com
Subject: dirfstat on tcp/udp/il connections is always 0
Topicbox-Message-UUID: 2488eeca-eac8-11e9-9e20-41e7f4b1d025
Message-ID: <19950916145302.A5vfq-FRGH-Jav75KJwTHQfMPN-76lCnx57tPYlrVbA@z>

Since dirfstat returns the size of the next message queued
for reading for pipes, it would be nice if the same happened
for IP protocols.  The following changes make it work.
Note that dirstat will still return 0 (the stream gets bound
to the fd on open...).

--------------------------------------------
In port/stream.c, replace streamstat() with:
--------------------------------------------

ulong
streamlen(Chan *c)
{
	Stream *s;
	Queue *q;
	Block *bp;
	ulong n;

	s = c->stream;
	n = 0;
	if(s) {
		q = RD(s->procq);
		if(q->flag & QHUNGUP)
			error(Ehungup);
		lock(q);
		for(bp=q->first; bp; bp = bp->next){
			n += BLEN(bp);
			if(bp->flags&S_DELIM)
				break;
		}
		unlock(q);
	}
	return n;
}
void
streamstat(Chan *c, char *db, char *name, long perm)
{
	Dir dir;

	devdir(c, c->qid, name, streamlen(c), eve, perm, &dir);
	convD2M(&dir, db);
}

--------------------------------------------
In port/net.c
--------------------------------------------

% diff net.c $old/net.c
93c93
< 		devdir(c, q, "data", streamlen(c), o, perm, dp);
---
> 		devdir(c, q, "data", 0, o, perm, dp);

--------------------------------------------
In port/portfns.h
--------------------------------------------

% diff portfns.h $old/portfns.h
267d266
< ulong		streamlen(Chan*);