Migrating from bourne to posix shell

[Srikanth Arunachalam]

Hi,

Can someone please explain me the checklist, I need to have to migrate scripts of bourne shell of TRU64 to POSIX shell of HP-UX. We are in the process of migrating all our existing script in TRU64 to HP-UX 11.23.

Thanks,
Srikanth

[Victor BERRIDGE]

Greetings,

IMHO I believe there is nothing to do...(except to check the correct path...)
the main difference I see between the two is posix shell has added functionalities...
The other way round is a different story


All the best
Victor

[James R. Ferguson]

Hi Srikanth:

This should be straightfoward. As Victor, noted, be sure to specify a ahe-bang (#!) interpreter. Use:

#!/usr/bin/sh

...for all users other than root; and *be sure for root* to use:

#!/sbin/sh

The version in '/usr/bin' uses dynamically linked libraries which are not available in single-user mode nor during the early start-up stages. However, its memory footprint is smaller than the staticlly linked libraries used in '/sbin/sh'. Hence, don't ever try and use anything other than 'sbin/sh' as the default shell for root.

Don't use '#!/bin/sh' either as the interpreter. '/bin' is an old transition link (to '/usr/bin' )and is deprecated. I believe it will vanish in 11.31 anyway.

Regards!

...JRF...

[spex · Accepted solution]

Srikanth,

Here's a nice page on the differences among various shells:

http://www.softlab.ntua.gr/facilities/documentation/unix/shelldiff.html

The table about halfway down is especially enlightening. While the POSIX shell is not given, 'sh-posix' and 'ksh' are nearly identical, so compare 'sh' to 'ksh'.

PCS

[inventsekar_1]

HI srikanth,
first thing is that the "first line"...ie, the #!/usr/bin/sh change.

the second thing is that:
what commands the script uses.
lot of TRU64 commands differ from HPUX commands.
for example, uname -p in TRU64 equal to uname -m or model in HPUX.

see attachment for more.

[Srikanth Arunachalam]

Hi Sekar,

Thanks for your response. I am not able to assign points. Can you please tell me what should be done to assign points to yourself.

Thanks,
Srikanth

[inventsekar_1]

HI srikanth..
u can assign the points in the same way how u assigned to the previous threads.

u will see a my name in and a line:
"Jun 29, 2006 20:21:05 GMT Unassigned "
the unassigned is a "drop down list". use that to assign points.

by the by, assign points for telling how to assign points. hey just for fun..
have fun..
Invent|Sekar

[Srikanth Arunachalam]

Hi Sekar,

Still I couldnt get that list box of unassigned points. The problem is I already assigned points yesterday, after that I received your valuable response. When I click sort by points..it only sorts with respect to points and doesnt display the list box with unassigned values.

Thanks,
Srikanth

[inventsekar_1]

i think u forget to login.