Shell Programming and Scripting

What shells does it have?

Check for combinations of /bin/bash, /usr/bin/ksh, /usr/local/bin/ksh, /bin/zsh etc?

porter, I'm just a shell programmer working on the project on a need to know basis, unfortunately. The higher ups do not want to make any compromises on the production system, so they instructed me to change the $(...) statements. I guess I can write a small line parser in C that will do the job. Its all I can come up with for the moment. I'm sure there are much easier, better solutions for the subsitution but i don't know of any. maybe perl or ruby (both of which I do not know). I'll consult with my tech lead...perhaps i can catch hold of him.

/usr/xpg4/bin/sh

will allow $( ) and other POSIX constructs, it is probable that that will be installed, while it will not completely remedy your situation it might reduce the amount of work you need to do.

...but are happy to put hurried/untested scripts on? How are you going to regression test, do you have a pre-prod system that similarly doesn't have ksh on it?

Thanks for the insight and advice porter. Apparently they don't have the xpg4 sh (the scripts simply didn't work in the system). These scripts haven't been tested yet. Someone from testing did rudimentary testing and discovered that the scripts don't work. Now I've got to rectify it. Perhaps, I'll use some start-from-scratch logic like this..

In the algorithm below,
'conv' is used count number of $(..) to convert.
Not sure, if regular parantheses these ever occur (just plain '(....)') . Just realized this. I am not accounting for them. But let me know if you know that regular parathesis do occur. As far as i know i am not using grep statements searching for regular paranthesis in the scripts)

For each file from list of files.
do

Move file to file_ksh

For each line in file_ksh
do


For each character in line
do

if char is $,
if next char is (
conv = conv + 1
replace_char = `
else if char is ) and conv != 0
replace_char = `
conv = conv - 1
else
replace_char=char

Write replace character into line_variable.
done

write line_variable into file

done

done

How does this sound?? I know that its roundabout but I dont know any other way. Thanks.