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can't able to work with eval anyway!

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# 1  
Old 11-09-2011
can't able to work with eval anyway!
my script
Code:
grep -v "^#" ${AP_Config}/masklist_new.txt | while  read system maskleft maskright folder_prd floder_uat datetype Region
do
        if [[ ${env} -eq "PRD" ]]; then
                folder_env="prd"
        else
                folder_env="uat"
        fi
targetfolder=${system}/eval echo \${folder_${folder_env}}
echo $targetfolder
done

Also I tried to assign some variable to eval and then trying call .Still not able to work as below
Code:
newvar=\${folder_${folder_env}}
targetfolder=${system}/eval echo $newvar

It should give the prd folder based on env value from the file.
Can anyone help me out to sort this problem ??
# 2  
Old 11-09-2011
You can't just dump eval in the middle of a string and expect it to do anything when not in backticks.

There's probably better ways to do what you want, depending on your shell. What is it?
# 3  
Old 11-09-2011
it's KSH .
Sorry I didn't get you by dumping eval in middle of the string calculation. Just let me know the better way. I have same config file but depending on env variable I need to pick PRD and UAT column values .

below is my msklist_new.txt file which remains same across the enviroment and if the env variable is PRD then it will pick the values of folder_prd and creates the folder list.
Code:
####################################################################################################################################################
# SYSTEM              MaskLeft                                MaskRight           Folder Prod         Floder UAT          DateType  Region         #
# 20 Char             40 Char                                 20 Char             20 Char             20 Char             10 Char   10 Char        #
####################################################################################################################################################
  su              xpnl_hypo_reu_miplvdone_                .csv                hypopnl             hypopnl             eu        europe
  su             xpnl_hypo_reu_miplvhypo_                .csv                hypopnl             hypopnl             eu        europe
  triss               triss_fxcb_                             .checksum.csv       checksum            checksum            eu        europe
  triss               triss_fxcb_                             .csv                cashbalance         cashbalance         eu        europe

if you think there is better way to do this, please let me know, I will glad to implement.

---------- Post updated at 10:40 AM ---------- Previous update was at 10:02 AM ----------

it's working
I made little change as below
Code:
eval targetfolder=${system}/\$folder_$folder_env

but appreciate if anyone suggest better approch.
Last edited by manas_ranjan; 11-09-2011 at 11:15 AM..
# 4  
Old 11-09-2011
Code:
$ SOMETHING="1234567"
$ VARNAME="SOMETHING"
$ echo "${!VARNAME}"
1234567
$

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