From 69f0b5d1a829f562b10febd1a6912184c9601ef3 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sat, 4 Feb 1995 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1995-02-04

---
 pc/devvga.c   | 12 ++++++------
 port/devmnt.c | 22 +++++++++++++++-------
 2 files changed, 21 insertions(+), 13 deletions(-)

diff --git a/pc/devvga.c b/pc/devvga.c
index de5f16f8a0e4420d4f22b787e1fe587f28e8200f..32afe2f2c9bfdb26ad24e999cfad5c3a8b54aa39 100644
--- a/pc/devvga.c
+++ b/pc/devvga.c
@@ -59,7 +59,7 @@ static Vgac vga = {
 };
 
 static Vgac *vgactlr = &vga;			/* available VGA ctlrs */
-static Vgac *vgac;				/* current VGA ctlr */
+static Vgac *vgac = &vga;			/* current VGA ctlr */
 static Hwgc *hwgctlr;				/* available HWGC's */
 Hwgc *hwgc;					/* current HWGC */
 
@@ -183,10 +183,9 @@ vgaread(Chan *c, void *buf, long n, ulong offset)
 	case Qdir:
 		return devdirread(c, buf, n, vgadir, Nvga, devgen);
 	case Qvgactl:
-		if(vgac == 0)
-			vgacp = &vga;
-		else
-			vgacp = vgac;
+		if(cga)
+			return readstr(offset, buf, n, "type: cga\n");
+		vgacp = vgac;
 		port = sprint(cbuf, "type: %s\n", vgacp->name);
 		port += sprint(cbuf+port, "size: %dx%dx%d%s\n",
 			gscreen.r.max.x, gscreen.r.max.y,
@@ -291,7 +290,8 @@ vgactl(char *arg)
 			error(Ebadarg);
 		interlaced[0] = *cp;
 
-		cursoroff(1);
+		if(cga == 0)
+			cursoroff(1);
 		setscreen(x, y, z);
 		cursoron(1);
 		return;
diff --git a/port/devmnt.c b/port/devmnt.c
index dbf731cf61b1b7f511970dad588a91bc2a11cb7f..fa5d7be1fef98438e4ce2ef60f900a65066178ca 100644
--- a/port/devmnt.c
+++ b/port/devmnt.c
@@ -494,11 +494,18 @@ mntread9p(Chan *c, void *buf, long n, ulong offset)
 long	 
 mntread(Chan *c, void *buf, long n, ulong offset)
 {
-	int nc;
 	uchar *p, *e;
+	int nc, cache, isdir;
+
+	isdir = 0;
+	cache = c->flag & CCACHE;
+	if(c->qid.path & CHDIR) {
+		cache = 0;
+		isdir = 1;
+	}
 
 	p = buf;
-	if(c->flag & CCACHE) {
+	if(cache) {
 		nc = cread(c, buf, n, offset);
 		if(nc > 0) {
 			n -= nc;
@@ -513,11 +520,10 @@ mntread(Chan *c, void *buf, long n, ulong offset)
 	}
 
 	n = mntrdwr(Tread, c, buf, n, offset);
-	if((c->qid.path & CHDIR) == 0)
-		return n;
-
-	for(e = &p[n]; p < e; p += DIRLEN)
-		mntdirfix(p, c);
+	if(isdir) {
+		for(e = &p[n]; p < e; p += DIRLEN)
+			mntdirfix(p, c);
+	}
 
 	return n;
 }
@@ -596,6 +602,8 @@ mntrdwr(int type, Chan *c, void *buf, long n, ulong offset)
 	uba = buf;
 	cnt = 0;
 	cache = c->flag & CCACHE;
+	if(c->path & CHDIR)
+		cache = 0;
 	for(;;) {
 		r = mntralloc(c);
 		if(waserror()) {