deleting 'carriage return' from string

Shell Programming and Scripting
1

hi there

I'm getting a string from a sqlplus query, and I need to compare it with another string

Problem here, is that the string i get from query brings a 'carriage return' with it, and comparing throws always false value.

i need to delete all carriage retun charactres in string.

how can i do that?

regards
VIKO

2

give an exampel from your file... if there is a ^M at the end of each line you can use the "dos2unix" command for example.

3

Or:

sed 's/^M$//' file > newfile

Press Ctrl-V then Ctrl-M toget ^M in the sed command.

Regards

4

i get string from a sql query, so it's in a variable: $string

i can't see carriage return any time in variable, because echo $string does no print these. and i'm not sure i'm talking about a CR.

but i'm sure something is in there, because if i try
var1='
reply'

and then i try

if [ $var1 == 'reply' ]; then

this returns false value. but again, i'm not sure if a carriage return is inside the variable.

i was trying with
${string/^M/}

but no changes.

5

well.

i made it, and just to help anyone eho needs something like this:

i have made something like:

dirty_var='
something'

var="$(echo $dirty_var | grep some_char_u_know_exists_in_var)"

for checking:
bash-2.05$ if [ "$dirty_var" == "something" ]; then echo OK; fi
bash-2.05$ if [ "$(echo $dirty_var | grep some)" == "something" ]; then echo OK; fi
OK
bash-2.05$

regards
VIKO

6

If you pipe the line(s) to "od -c" you will be able to "see" the special characters (\t for tabs, etc.). That should help you make a more precise fix.

Example:

cat file.txt | od -c

7

Thanks

that's very usefull for me

regards
VIKKKO