QNX Technical Articles

Date of this edition: May 16, 2008

Target OS: This patch is compatible with targets that are running QNX^® Neutrino^® 6.3.0 SP2, 6.3.0 SP3, or 6.3.2.

Host OS: In order to apply this patch, you must have installed QNX Momentics 6.3.0 SP2, 6.3.0 SP3, or 6.3.2, as a self-hosted QNX^® Neutrino^® system, or on one of the following host OSs:

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For information about the issues that this patch addresses, see the release notes.

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This note includes:

• Installation procedure
• Structure of a patch
• Applying the patch
• Technical support

Installation procedure

1. Log in as root (or with administrator privileges on Windows).
2. On Debian 3.1 hosts, set up your environment by typing:

   source /etc/profile
     

3. Download the patch-630SP2-0842-Charset-Photon.tar archive to your host environment.
4. Determine the base directory of your QNX Momentics installation by opening a command shell and using the qconfig command. For example:

   $ qconfig
   QNX Installations
   
     Installation Name: QNX Momentics 6.3.0 SP3
               Version: 6.3.0 SP3
        Base Directory: /usr/qnx630/
              QNX_HOST: /usr/qnx630/host/qnx6/x86/
            QNX_TARGET: /usr/qnx630/target/qnx6/
     

   The base directory in this example is /usr/qnx630/, but it could be different on your machine, depending on your host and where you installed QNX Momentics.

5. Extract the archive you downloaded into the base directory:
   • Windows hosts:
     1. Open a command prompt (cmd.exe) and switch to the drive indicated in the base directory that you found earlier (e.g. C:).
     2. Copy the archive to your base directory, replacing base_dir with the path you found earlier:

        copy drive:\patch-630SP2-0842-Charset-Photon.tar base_dir

     3. Use the following commands to extract the archive contents. Don't specify the drive letter in the archive path:

        cd base_dir
        tar -xvf patch-630SP2-0842-Charset-Photon.tar

   • Neutrino, Linux, and Solaris hosts:

     Open a command shell and use the following commands (replacing base_dir with the path found earlier, and archive_path with the full path to the downloaded archive):

     cd base_dir
     tar -x -v -f archive_path/patch-630SP2-0842-Charset-Photon.tar

Structure of a patch

The patch is installed in the base_dir/patches/630SP2-0842/ directory. This directory includes:

version

Includes the patch number and the build information.

manifest

Contains the checksums of the files shipped in the patch (as generated by the cksum utility).

shiplist

A list of the files included in the patch.

target

A directory of fixes related to components that would be built into QNX Neutrino target or runtime systems.

Applying the patch

Next, you must determine how to incorporate the patch into your host system. The patch is stored in a directory (or folder) that's separate from your development system. This allows you some flexibility in how to apply the patch.

There are three methods for using a patch:

• modifying build and configuration files to look in the patch subdirectory
• creating an override directory tree
• replacing the development host files with those from the patch.

Method 1: Modifying build and configuration files

In the first method, you can use the files in the patch by simply modifying buildfiles to include the full path to the files in the patch subdirectory. This allows you to test the patch before committing to it. It doesn't affect your development host. If you choose to stop using the patch, you just need to change the buildfiles back.

Method 2: Using an override directory tree

You can use a similar approach that involves creating an “override” tree. You can tell the system builder and mkifs utilities to look for binaries in a particular subdirectory before looking in the standard location ($QNX_TARGET).

To do this from the command line:

1. cd base_dir
2. mkdir build
3. pax -rw patches/630SP2-0842/target/qnx6/* build/
4. Add base_dir/build to your system builder paths. For mkifs, you can use the -r option, specifying the same path.

Method 3: Replacing the development host files

The third method replaces the files on your development host with the patched files.

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Since this is a destructive procedure, we recommend that you create a backup of the affected files.

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Creating a backup

To create a backup on any of our hosts:

1. (Windows only) From the cmd.exe prompt, run ksh.
2. Go to the base directory:

   cd base_dir

3. Make a backup of the files that will be overwritten:

   pax -w < patches/630SP2-0842/shiplist > patches/630SP2-0842-backup.tar

   You can use whatever name you like for the backup archive. The pax utility might display some error messages when it attempts to back up nonexistent files for host operating systems other than the one you're using. You can ignore these messages.

4. (Windows only) Exit ksh.

Copying the files — Windows hosts

To apply the patch on a Windows system from the command prompt (remember to switch back to cmd.exe from ksh):

1. Switch to the drive specified in your base directory (e.g. C:).
2. Go to the patch directory (remember to replace / characters in the base directory with \):

   cd base_dir\patches\630SP2-0842

3. Install the target updates:

   cp -Rp target base_dir\.

Copying the files — Neutrino, Linux, and Solaris hosts

To apply the patch on a Neutrino, Linux, or Solaris system:

1. Go to the patch directory:

   cd base_dir/patches/630SP2-0842

2. Install the target updates:

   cp -Rp target base_dir/.

3. (QNX Neutrino only) Install the runtime updates:

   cd target/qnx6/
   cp usr/photon/translations/charsets /usr/photon/translations/charsets
   cd x86
   cp -fRp . /
     

Technical support

If you have any questions, comments, or problems with a QNX product, please contact Technical Support. For more information, see the How to Get Help chapter of the Welcome to QNX Momentics guide or visit our website, www.qnx.com.