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Old 08-11-2011, 02:43 AM   #1
luvshines
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Registered: Apr 2009
Posts: 74

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Unhappy Where did the trailing newline characters go


I am working with bash scripting and running into a weird issue where the trailing newline characters are being truncated.

The file contents are something like:
Code:
# Catting the file shows the trailing \n characters
cat /tmp/junk
first line
second line
\n
\n
If I read it into a variable
Code:
myvar=`cat /tmp/junk`
The variable doesn't have the \n in the end
Code:
echo "$myvar"
first line
second line
Since I am working with config files, some of the applications/daemons fail to start if they fail to find trailing newline characters
 
Old 08-11-2011, 04:51 AM   #2
EmaRsk
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Registered: Mar 2006
Distribution: Funtoo
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Interesting...
Even without passing through a variable
Code:
echo "$(cat /tmp/junk)"
cuts the trailing newlines.

Last edited by EmaRsk; 08-11-2011 at 07:13 AM.
 
Old 08-11-2011, 10:36 AM   #3
catkin
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Registered: Dec 2008
Location: Tamil Nadu, India
Distribution: Debian
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Bash command substitution removes trailing newlines
 
Old 08-11-2011, 12:09 PM   #4
bvm2607
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Registered: Sep 2008
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myvar= && while read str; do myvar=$myvar$str"\n"; done < /tmp/junk
 
Old 08-13-2011, 12:56 AM   #5
luvshines
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Registered: Apr 2009
Posts: 74

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Quote:
Originally Posted by catkin View Post
Thanks for pointing me to this link
It has both the explanation and a workaround for my problem

Issue resolved
 
  


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