From 3f429c5533b604bcf6397dea6ad49e7cf6c7b8ff Mon Sep 17 00:00:00 2001
From: dg <dg@FreeBSD.org>
Date: Sun, 12 Nov 1995 10:16:53 +0000
Subject: [PATCH] Fix isoilk hang caused by not checking for read-onlyness in
 several places. The fix for this in Lite-2 is more complete, but these quick
 hacks of mine are safer for now. I plan to integrate the additional Lite-2
 stuff at some later time. Should completely fix PR810.

---
 sys/fs/cd9660/cd9660_lookup.c    |  4 ++--
 sys/fs/cd9660/cd9660_vnops.c     | 18 +++++++++++++++++-
 sys/isofs/cd9660/cd9660_lookup.c |  4 ++--
 sys/isofs/cd9660/cd9660_vnops.c  | 18 +++++++++++++++++-
 4 files changed, 38 insertions(+), 6 deletions(-)

diff --git a/sys/fs/cd9660/cd9660_lookup.c b/sys/fs/cd9660/cd9660_lookup.c
index 9c359d13403f..c22bfcdf1832 100644
--- a/sys/fs/cd9660/cd9660_lookup.c
+++ b/sys/fs/cd9660/cd9660_lookup.c
@@ -38,7 +38,7 @@
  *	from: @(#)ufs_lookup.c	7.33 (Berkeley) 5/19/91
  *
  *	@(#)cd9660_lookup.c	8.2 (Berkeley) 1/23/94
- * $Id: cd9660_lookup.c,v 1.7 1995/05/30 08:04:57 rgrimes Exp $
+ * $Id: cd9660_lookup.c,v 1.8 1995/10/22 09:32:15 davidg Exp $
  */
 
 #include <sys/param.h>
@@ -376,7 +376,7 @@ notfound:
 	if (cnp->cn_flags & MAKEENTRY)
 		cache_enter(vdp, *vpp, cnp);
 	if (nameiop == CREATE || nameiop == RENAME)
-		return (EJUSTRETURN);
+		return (EROFS);
 	return (ENOENT);
 
 found:
diff --git a/sys/fs/cd9660/cd9660_vnops.c b/sys/fs/cd9660/cd9660_vnops.c
index 074de85d434c..0296eca22d45 100644
--- a/sys/fs/cd9660/cd9660_vnops.c
+++ b/sys/fs/cd9660/cd9660_vnops.c
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)cd9660_vnops.c	8.3 (Berkeley) 1/23/94
- * $Id: cd9660_vnops.c,v 1.18 1995/10/31 12:13:47 phk Exp $
+ * $Id: cd9660_vnops.c,v 1.19 1995/11/09 08:13:37 bde Exp $
  */
 
 #include <sys/param.h>
@@ -183,6 +183,22 @@ cd9660_access(ap)
 		struct proc *a_p;
 	} */ *ap;
 {
+	/*
+	 * Disallow write attempts on read-only file systems;
+	 * unless the file is a socket, fifo, or a block or
+	 * character device resident on the file system.
+	 */
+	if (ap->a_mode & VWRITE) {
+		switch (ap->a_vp->v_type) {
+		case VDIR:
+		case VLNK:
+		case VREG:
+			if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
+				return (EROFS);
+			break;
+		}
+	}
+
 	return (0);
 }
 
diff --git a/sys/isofs/cd9660/cd9660_lookup.c b/sys/isofs/cd9660/cd9660_lookup.c
index 9c359d13403f..c22bfcdf1832 100644
--- a/sys/isofs/cd9660/cd9660_lookup.c
+++ b/sys/isofs/cd9660/cd9660_lookup.c
@@ -38,7 +38,7 @@
  *	from: @(#)ufs_lookup.c	7.33 (Berkeley) 5/19/91
  *
  *	@(#)cd9660_lookup.c	8.2 (Berkeley) 1/23/94
- * $Id: cd9660_lookup.c,v 1.7 1995/05/30 08:04:57 rgrimes Exp $
+ * $Id: cd9660_lookup.c,v 1.8 1995/10/22 09:32:15 davidg Exp $
  */
 
 #include <sys/param.h>
@@ -376,7 +376,7 @@ notfound:
 	if (cnp->cn_flags & MAKEENTRY)
 		cache_enter(vdp, *vpp, cnp);
 	if (nameiop == CREATE || nameiop == RENAME)
-		return (EJUSTRETURN);
+		return (EROFS);
 	return (ENOENT);
 
 found:
diff --git a/sys/isofs/cd9660/cd9660_vnops.c b/sys/isofs/cd9660/cd9660_vnops.c
index 074de85d434c..0296eca22d45 100644
--- a/sys/isofs/cd9660/cd9660_vnops.c
+++ b/sys/isofs/cd9660/cd9660_vnops.c
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)cd9660_vnops.c	8.3 (Berkeley) 1/23/94
- * $Id: cd9660_vnops.c,v 1.18 1995/10/31 12:13:47 phk Exp $
+ * $Id: cd9660_vnops.c,v 1.19 1995/11/09 08:13:37 bde Exp $
  */
 
 #include <sys/param.h>
@@ -183,6 +183,22 @@ cd9660_access(ap)
 		struct proc *a_p;
 	} */ *ap;
 {
+	/*
+	 * Disallow write attempts on read-only file systems;
+	 * unless the file is a socket, fifo, or a block or
+	 * character device resident on the file system.
+	 */
+	if (ap->a_mode & VWRITE) {
+		switch (ap->a_vp->v_type) {
+		case VDIR:
+		case VLNK:
+		case VREG:
+			if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
+				return (EROFS);
+			break;
+		}
+	}
+
 	return (0);
 }