Shell Programming and Scripting

Hi,

i have an issue with eval and variable assignment.

1) i have a date value in a variable and that date is part of a filename,
var1=20100331
file1=${var1}-D1-0092.xml.zip
file2=${var2}-D2-0092.xml.zip
file3=${var3}-D3-0092.xml.zip
i am passing the above variables to a script via commandline and assigning the values of these
variables to another set of variables using while get opts command as below,

f) eval FILE=\$${OPTARG}
FILES="$FILE $FILES";;

Issue - the array variable FILES is not populated with filenames here.

2) Issue with filenames - I have filenames which consists of spaces and special characters.
eg: REP - inven - 1.TXT
I am using same concept as above. i.e. passing variables to script. i am getting error
with eval command.

Please advise in both scenarios on how to avoid issues.

Thanks in advance..

Regards,
Mohan

Please post the entire script.

To populate an array the correct syntaxes are:

Code:

ARRAY=( "Elem1" "Elem 2" "Third element" "Four has index 3" )
# or
ARRAY[$index]="Element X"

Try to put quotes + escaped quotes

Code:

eval "FILE=\"\$${OPTARG}\""

Hi Frans,

Thank you very much. First step is working for me.

regarding the step#2, i maintain all the job related variables in a config script which gets evaluated at the start of every job. The below variables are giving error while evaluating,

Var1="REP0022 - Yesterday's account savings_ 1.TXT"

Error :
ksh -: not found

I tried enclosing above filename in single quotes but of no use.

Thanks in advance.

Regards,
Mohan

You should initialize the variable like

Code:

STRING="Var1=\"REP0022 - Yesterday's account savings_ 1.TXT\""
eval "$STRING"

HI Frans,

Thank you. I am able to assign the filenames to a variable now . I have 3 variables like this. all of these are assigned to an array. i am able to get part of the filename (i.e. till the space as a value)while retrieving .

Following is the code :

storing the values in FILES string after we receive the values from commandline,
f) eval FILE=\"\$${OPTARG}\"
FILES="$FILE $FILES";;

assigning the FILES string to an array : set -A filesToGet $FILES

Retrieving each file from the array : file=${filesToGet[$curFileIndex]}

but this way it is considering only part of the filename.i.e. till the first space as a first filename. Please suggest how can i retrive the whole filename i.e. REP00029 - Yesterdays Postings Total_ 1.TXT

Once again thanks in advance..

Regards,
Mohan

Maybe you should directly construct the array like this:

Code:

# to add $FILE (string) to $FILES (array)
$FILES[${#FILES[@]}]="$FILE" # ${#FILES[@]} gives the nb of elements in the array => the first empty index (first is 0)