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# 1  
Old 05-20-2009
Flavours of shell?
It's a little while since I used Linux in anger but when I did, Bourne shell (/bin/sh) was actually Bash (/bin/bash) in disguise Smilie - I had some native Solaris Bourne scripts that didn't want to work quite right on Linux. Is this still the case? Also, for similar reasons, is Korn shell on Linux the same as Korn shell on Solaris. And finally, what about Perl? For a standard Linux distro, what Perl version would be expected?
# 2  
Old 05-20-2009
Quote:
Originally Posted by JerryHone
It's a little while since I used Linux in anger but when I did, Bourne shell (/bin/sh) was actually Bash (/bin/bash) in disguise Smilie - I had some native Solaris Bourne scripts that didn't want to work quite right on Linux. Is this still the case?

There is no Bourne shell for Linux, but most Bourne scripts will run correctly. The biggest problem is the use of echo (which has incompatibilities even among different Bourne shells). You can set (or unset) an option in bash to use the same flavour of echo as is used in your Solaris scripts.

There may also be problems with different versions of external utilities.
Quote:
Also, for similar reasons, is Korn shell on Linux the same as Korn shell on Solaris.

Which version do you have on Solaris?

For portable scripts, use POSIX syntax and avoid echo.
# 3  
Old 05-20-2009
A bit of background...I work with a large legacy application that is a mix of SQL, Perl, shell, compiled C etc that's been developed and evolved over the last 10+ years Smilie ...you name it, we've got it! The question's been asked whether we could migrate from Solaris (8 at the moment but soon 10) to Linux. So, the question is not whether we could now write portable code, but how portable our existing code base is!
From cfajohnson's reply, it would seem that the answer is probably "not very"!
# 4  
Old 05-20-2009
Quote:
Originally Posted by JerryHone
So, the question is not whether we could now write portable code, but how portable our existing code base is!
From cfajohnson's reply, it would seem that the answer is probably "not very"!

You would have to examine the code and see how it was written.

If it is well written, it could be "very"; otherwise "not very".
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