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How to retain backslash in a line while reading a data file?

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# 1  
Old 09-13-2010
CPU & Memory How to retain backslash in a line while reading a data file?
Hello Firends

I have a file that contains data within single quotes, which has meaning of its own. When I am trying to parse through the file for a different functionality I noticed that I was loosing the backslash when occurrences in the file look like ('\0'). I would want to retain the backslash. Please advise. Below is the kind of script I want, but with the backslash retained. Thanks in advance.

Example BEGIN

Input File

Code:
$ cat t9.dat
type string1_t = utf8 string('\0');
type string2_t = utf8 string('\0');
type string3_t = utf8 string('\0');
type string4_t = utf8 string('\0');

Command line Script : Example segment

Code:
$cat t9.dat | while read LINE
> do
> echo $LINE
> done
type string1_t = utf8 string('0');
type string2_t = utf8 string('0');
type string3_t = utf8 string('0');
type string4_t = utf8 string('0');
$

Note that the output above is missing the \ character.

EXAMPLE END


Thank You!!
Last edited by pludi; 09-14-2010 at 03:24 AM..
# 2  
Old 09-13-2010
Try:
Code:
while read -r line

This User Gave Thanks to Scrutinizer For This Post:
easwam
# 3  
Old 09-14-2010
Thanks Scrutinizer, that was helpful.

But I also had to do echo -E $LINE, probably because of my shell default.

Code:
$cat t9.dat | while read -r LINE
> do
> echo -E $LINE
> done
type string1_t = utf8 string('\0');
type string2_t = utf8 string('\0');
type string3_t = utf8 string('\0');
type string4_t = utf8 string('\0');

how do I find out my SHELL default?

Thanks
Mani

Moderator's Comments:
Mod Comment Please use code tags instead of font or color formatting
Last edited by pludi; 09-14-2010 at 03:25 AM..
# 4  
Old 09-14-2010
Yes, the implementation of echo varies. It is best to use:
Code:
printf "%s\n" "$line"

which works the same on all platforms
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