Patch for SUN Operating Systems to read ISO9660 standard CDROMs.

A patch must be applied to the SunOS 4.1.x and the Solaris 2.x operating systems (if your system manager has not already done so). The patch allows the operating system to see the ``record structured" files that reside on our ISO 9660 format CD-ROM discs, a capability that is not (but should be) supported by the Sun supplied ISO 9660 driver. The patch is really only a work around and does not provide "proper" access to these files. The files on the CD-ROMs that we produce have fixed, even-length records and that is why the patch works. SunSoft should fix their ISO 9660 driver to provide complete ISO 9660 support. The current patches are only supported with the SPARC (sun4, sun4c, sun4m) architecture. A patch does not currently exist for 68k (sun3) or x86 based Solaris systems.

To apply the patch under SunOS 4.1.x (Solaris 1.x) you need to do the following steps:

Log in as root or su to root
Change directory (cd) to /usr/sys/`arch -k`/OBJ (Note that these are back-ticks rather than forward-ticks)
Save a copy of the file hsfs\_node.o in case you need to restore the original version in the future

If your system is running 4.1, 4.1.1, or 4.1.1b, type:

          adb -w hsfs_node.o
          hs_parsedir+9c?Wba0da0e6
          hs_parsedir+14c?Wba0da0e6
          $q

Your output should look like:

          hs_parsedir+9c?Wba0da0e6
          _hs_parsedir+0x9c:         0xba0da0ee   =   0xba0da0e6
          hs_parsedir+14c?Wba0da0e6
          _hs_parsedir+0x14c:        0xba0da0ee   =   0xba0da0e6
          $q

If your system is running 4.1.2, or one of the many versions of 4.1.3, type:

          adb -w hsfs_node.o
          hs_parsedir+c0?Wba0de0e6
          hs_parsedir+1a4?Wba0de0e6
          $q

Your output should look like:

          hs_parsedir+c0?Wba0de0e6
          _hs_parsedir+0xc0:         0xba0de0ee   =   0xba0de0e6
          hs_parsedir+1a4?Wba0de0e6
          _hs_parsedir+0x1a4:        0xba0de0ee   =   0xba0de0e6
          $q

Verify that the kernel configuration file contains a line similar to:

          options		HSFS	# Support for ISO 9660 CDs

and a line or lines similar to

          disk sr0 at scsibus0 target 6 lun 0	# CD-ROM device

After completing these steps, you must rebuild the kernel and install the new one. Save a copy of the old kernel before installing the new one in case you need to restore the original version in the future. Once the new kernel is installed, the system must be rebooted for the changes to take effect.

To apply the patch under Solaris 2.0 or 2.1, type:

          adb -w /kernel/fs/hsfs
          hs_parsedir+0xcc?W ba8de0e6
          hs_parsedir+0x198?W ba8de0e6
          $q

Your output should look like:

          hs_parsedir+0xcc?W ba8de0e6
          hs_parsedir+0xcc:          0xba8de0ee   =   0xba8de0e6
          hs_parsedir+0x198?W ba8de0e6
          hs_parsedir+0x198:         0xba8de0ee   =   0xba8de0e6

Find the module id for the hsfs driver by typing:
```
          modinfo | grep hsfs
```
The first number is the module id.
Unload the driver using the modunload command, replacing xxx with the module id
```
          modunload -i xxx
```
If modunload fails, reboot the system instead.

To apply the patch under Solaris 2.2 through 2.6 versions

/etc/system

          set hsfs:ide_prohibited=0xe6
          set hsfs:hde_prohibited=0xe6

Find the module id for the hsfs driver:
```
          modinfo | grep hsfs
```
The first number is the module id.
Unload the driver using the modunload command, replacing xxx with the module id
```
          modunload -i xxx
```
If modunload fails, reboot the system instead.