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Shell Programming and Scripting

Help Needed with Shell Script Variable

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# 1  
Old 03-12-2010
Help Needed with Shell Script Variable
ok, so, i want to do something like this where i store results of codings in a variable, but when i run it, it doesn' twork:


example

Code:
HOT=34
BOSS=`john=133
if [ "$john -eq 133 ] ; then
ADDIT=`expr 8 + 6`
case $HOT in
34) expr 4 + 5 ;; esac
fi`

it seems shell scripts have a problem with having `` occur more than once. does anyone know a way around this? i want to be able to execute another command or action within a `` .

i hope you understand what i'm asking.
Last edited by pludi; 03-12-2010 at 01:08 PM.. Reason: code tags, please...
# 2  
Old 03-12-2010
Yes, that's right, backticks can't be nested. Which is why just about any shell gives you a warning when running the syntax check (eg. 'ksh -n yourscript.sh') that backticks should be replaced by the $(...) construct, which is nestable.
# 3  
Old 03-12-2010
Code:
#!/bin/somesh (bash,dash,ksh,sh,...)
HOT=34

############################
dosome()
{
john=133
if [ "$john" -eq 133 ]
then
        ADDIT=$((8 + 6))
        case "$HOT" in
                34) echo $((4 + 5)) ;;
        esac
fi
}

############################
BOSS=$(dosome)
echo "$BOSS"

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