[OpenVMS, HP GNV] Latest Linux diff and patch available on OpenVMS


PRODUCT:    Linux patch Version 2.6.1
            Linux diffutils Version 3.2
            HP GNV Version 2.3-1 or above
            HP C Version 7.2-022
            Either MMK Version 4.1 or HP MMS Version 3.8-2


OP/SYS:     OpenVMS IA64 Version 8.3-1H1


COMPONENT:  sources differences and automatic patching
            Linux style diff and patch


SOURCE:     Philippe Vouters
            Fontainebleau/France


LOW-COST HIGH-TECH:  http://techno-star.fr


OVERVIEW:

These Linux diff and patch ports onto OpenVMS enable to obtain a diff file which
contains source differences between an original and a modified file or
scanning recursively inside two directories to diff all source files.
In any case it is a one to one difference. The output of the diff utility may
be used as an input to the patch utility which accordingly modifies all
relevant source files.

As an example of use and inside your company, you will be able to benefit from
any patch from your Linux, HP-UX or Windows/MinGW/Cygwin colleagues on company
common software projects using the patch utility. The same you may submit them
your own patches. All this in a close teamwork.

Outside your company you will be able to share your code changes with the
Opensource developer using diff. In turn you may as well benefit from the latest
Opensource code fixes using patch.


*** CAUTION ***

These diff and patch utilities have been built and tested using HP GNV V2.1.3,
HP C V7.2-022 and MMS V3.8-2 on OpenVMS V7.3-1H1.  However, we cannot guarantee 
their effectiveness because of the possibility of error in transmitting or 
implementing them. They are meant to be used as a template for writing your
own utilities, and may require modification for use on your system. 


DOWNLOAD:

Download HP GNV from this URL link:
http://h71000.www7.hp.com/opensource/gnv.html

Download diffutils-3.2.tar.gz sources from:
http://ftp.gnu.org/gnu/diffutils/diffutils-3.2.tar.gz

To get the patch utility sources, download ../zip/patch-2.6.1.tar.gz

To get the diffutils patch for OpenVMS servers, download 
../zip/diffutils-3.2.diff.tar.gz

If you neither have MMS nor MMK installed, download MMK from:
http://www.kednos.com/kednos/Open_Source/MMK


BUILDING THE TWO UTILITIES ON YOUR OPENVMS SYSTEM:

Step 1:
Install HP GNV using $ product install DCL command

If you only run MMK, set this global symbol prior to activating bash:

        $ mms :== "''MMK'"

Step 2:
$ bash
bash$ gnutar -zxvf patch-2.6.1.tar.gz
bash$ cd patch-2.6.1
bash$ make -f Makefile_vms install
bash$ cd ..
bash$ gnutar -zxvf diffutils-3.2.tar.gz
bash$ gnutar -zxvf diffutils-3.2.diff.tar.gz
bash$ patch -p1 -d diffutils-3.2/ < diffutils-3.2.diff
bash$ cd diffutils-3.2
bash$ dcl @diffutils-build.com
bash$ cd ..
bash$


PROGRAM NOTES:

To produce a diff file such as performed in the Linux world:

        bash$ diff -au oldfile newfile > file.diff

or to diff recursively two directories

        bash$ diff -Naur old-dir/ newdir/ > file.diff

To patch using a diff file:

        bash$ patch -p0 [/path/to/file] < file.diff

or to patch recursively a directory

        bash$ patch -p1 -d original-dir/ < file.diff


OPENVMS HINTS:

These two utilities are installed into /usr/bin. So if you set the DCL$PATH
logical as a search list containing "GNU:[usr.bin]", you would then be able to
use diff and patch from the DCL prompt.


REFERENCE(S):

Linux diff and patch mans