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Share snarf buffer with rio; a huge hack, but it works.

--- a/sam/mesg.c

+++ b/sam/mesg.c

@@ -349,6 +349,12 @@

 		f = whichfile(inshort());

 		p0 = inlong();

 		journaln(0, p0);

+		int fd = open("/dev/snarf", OREAD);

+		if(fd < 0)

+			panic("paste: open");

+		bufreset(&snarfbuf);

+		bufload(&snarfbuf, 0, fd, &i);

+		close(fd);

 		for(l=0; l<snarfbuf.nc; l+=m){

 			m = snarfbuf.nc-l;

 			if(m>BLOCKSIZE)

@@ -576,7 +582,9 @@

 snarf(File *f, Posn p1, Posn p2, Buffer *buf, int emptyok)

 {

 	Posn l;

-	int i;

+	int i, fd, n;

+	String *s;

+	char *cs;

 	if(!emptyok && p1==p2)

 		return;

@@ -586,11 +594,23 @@

 		fprint(2, "bad snarf addr p1=%ld p2=%ld f->nc=%d\n", p1, p2, f->nc); /*ZZZ should never happen, can remove */

 		p2 = f->nc;

 	}

+	fd = open("/dev/snarf", OWRITE);

+	if(fd < 0){

+		fprint(2, "snarf: %r\n");

+		return;

+	}

 	for(l=p1; l<p2; l+=i){

 		i = p2-l>BLOCKSIZE? BLOCKSIZE : p2-l;

 		bufread(f, l, genbuf, i);

-		bufinsert(buf, buf->nc, tmprstr(genbuf, i)->s, i);

+		s = tmprstr(genbuf, i);

+		cs = Strtoc(s);

+		n = strlen(cs);

+		if(write(fd, cs, n) != n)

+			fprint(2, "snarf: %r\n");

+		free(cs);

+		bufinsert(buf, buf->nc, s->s, i);

 	}

+	close(fd);

 }

 int