gline() was peeking inside its Biobuf to get the line
length, probably predates Blinelen(). It was an issue for portability to Win32.

-Steve

Reference: /n/sources/patch/applied/uniq-niggle
Date: Fri May  1 17:55:58 CES 2009
Signed-off-by: steve@quintile.net

--- /sys/src/cmd/uniq.c	Fri May  1 17:54:47 2009
+++ /sys/src/cmd/uniq.c	Fri May  1 17:54:45 2009
@@ -91,10 +91,10 @@
 	p = Brdline(&fin, '\n');
 	if(p == 0)
 		return 1;
-	if(fin.rdline >= bsize-1)
+	if(Blinelen(&fin) >= bsize-1)
 		sysfatal("line too long");
-	memmove(buf, p, fin.rdline);
-	buf[fin.rdline-1] = 0;
+	memmove(buf, p, Blinelen(&fin));
+	buf[Blinelen(&fin)-1] = 0;
 	return 0;
 }