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Escaping a variable in ksh

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# 1  
Old 03-20-2019
Escaping a variable in ksh
I am trying to echo a variable exactly to a script-

Code:
echo "${var1} ${var2} >> output.output

Gives me a blank file.

I would like output.output to basically say:

Code:
${var1} ${var2}

I think I need to use a special escape character for variables. Am I right in assuming that, and is it the best approach?
# 2  
Old 03-20-2019
Quote:
Originally Posted by jeffs42885
I am trying to echo a variable exactly to a script-

Code:
echo "${var1} ${var2} >> output.output

Gives me a blank file.

I would like output.output to basically say:

Code:
${var1} ${var2}

I think I need to use a special escape character for variables. Am I right in assuming that, and is it the best approach?
couple of problems:
  1. you're missing a closing double-quote for your echo to work
  2. if you want a literal string ${var1} ${var2}, use SINGLE-quotes for the echo (instead of DOUBLE-QUOTES)
Last edited by vgersh99; 03-20-2019 at 01:10 PM..
# 3  
Old 03-20-2019
Code:
echo "\${var1} \${var2}"

Ooops just saw your post vgersh99...
This User Gave Thanks to vbe For This Post:
vgersh99
# 4  
Old 03-20-2019
Quote:
Originally Posted by vbe
Code:
echo "\${var1} \${var2}"

Ooops just saw your post vgersh99...
This worked great. One concern.

I am trying to echo a query that gets passed to my command:

Heres what I am getting

Code:
-i "where doc_name like \'%\'

Heres what I need

Code:
-i "where doc_name like '${variable}%'

Last edited by RudiC; 03-20-2019 at 03:41 PM..
# 5  
Old 03-20-2019
Please be VERY careful with your quotes (single / double)! You seem to be missing one again in above!



Do I get you right that you want '${variable}' literally written to your file, but then expanded when executing that file? Might run into trouble with all those single quotes in place. Please post a sample of the desired output file (and its possible execution log).
# 6  
Old 03-20-2019
Quote:
Originally Posted by RudiC
Do I get you right that you want '${variable}' literally written to your file, but then expanded when executing that file? Might run into trouble with all those single quotes in place. Please post a sample of the desired output file (and its possible execution log).
Nope.

Here's what I am running-

Code:
while IFS=, read agname tablename
do
echo "while read IFS=, read docname agname" >> $BASEDIR/scripts/${agname}_retrieval.ksh
echo "do" >> $BASEDIR/scripts/${agname}_retrieval.ksh
echo "get -G \${agname} -i \"where doc_name like \'${docname}%\'" -o \${agname}" >> $BASEDIR/scripts/${agname}_retrieval.ksh
echo "done" < $BASEDIR/data/${agname}/${agname}_docnames.del" >> $BASEDIR/scripts/${agname}_retrieval.ksh
done < $BASEDIR/output/$STEP1_OUTPUT

The final script is generating but..

Code:
while read IFS=, read docname agname
do
get -acgNv -G ${agname} -i "where doc_name like \'%\' -o ${agname} >> /tmp/final/scripts/AG_retrieval.ksh
echo done < /tmp/final/data/AG/AG_docnames.del

Not sure why it's putting extra echos in the output

Desired-

Code:
while read IFS=, read docname agname
do
get -acgNv -G ${agname} -i "where doc_name like '${docname}%' -o ${agname}
 done < /tmp/final/data/AG/AG_docnames.del




Moderator's Comments:
Mod Comment Please use CODE tags as required by forum rules!
Last edited by RudiC; 03-20-2019 at 03:56 PM.. Reason: Added/Changed CODE tags.
# 7  
Old 03-20-2019
See post #5, line 1.



EDIT: How far would this get you (zeroth approximation):
Code:
while IFS=, read agname tablename
  do    exec  > $BASEDIR/${agname}_retrieval.ksh
        echo "while read IFS=, read docname agname"
        echo "do"
        echo "get -G \${agname} -i \"where doc_name like '\${docname}%'\" -o \${agname}"
        echo "done < $BASEDIR/data/${agname}/${agname}_docnames.del"
        exec 1>&2
   done < $BASEDIR/output/$STEP1_OUTPUT


EDIT: or (first approximation)



Code:
while IFS=, read agname tablename
  do    cat <<-EOTXT  > $BASEDIR/${agname}_retrieval.ksh
        while read IFS=, read docname agname
        do
        get -G \${agname} -i "where doc_name like '\${docname}%'" -o \${agname}
        done < $BASEDIR/data/${agname}/${agname}_docnames.del
        EOTXT
      done < $BASEDIR/output/$STEP1_OUTPUT

Last edited by RudiC; 03-20-2019 at 05:04 PM..
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