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Shell Programming and Scripting

Appending newline character End of File

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# 8  
Old 12-30-2013
Another version using a variable:-
Code:
#!/bin/bash --posix
echo "Your example string..."
text=$(printf "1|Main|Test|~#
2|Main|Hello|~#
3|Main|Unix|~#
4|Main|File|~#")
printf "$text"
echo "Now add a newline at the end..."
text="$text"'\n'
printf "$text"

Results:-
Code:
Last login: Mon Dec 30 18:45:09 on ttys000
AMIGA:barrywalker~> chmod 755 add_nl1.sh
AMIGA:barrywalker~> ./add_nl1.sh
Your example string...
1|Main|Test|~#
2|Main|Hello|~#
3|Main|Unix|~#
4|Main|File|~#Now add a newline at the end...
1|Main|Test|~#
2|Main|Hello|~#
3|Main|Unix|~#
4|Main|File|~#
AMIGA:barrywalker~> _

# 9  
Old 12-30-2013
Quote:
POSTED by Gouri:
Hi Ravinder,

When I used the code, it is working fine for only 4 lines. If I add additional line it is not working. The number of lines in the file could be anything. Which we don't know until the file is generated.

Thank you.
Hello Gouri,

May be following can help.


Code:
a=`awk 'END {print NR}' add_new_line_char1`; awk -vs1="$a" 'NR==s1 {print $0"\\n"} !/^4/' add_new_line_char1

So by this we can save how many number of lines are there in file then we can append the new line character as per your requirement.



Thanks,
R. Singh
# 10  
Old 12-30-2013
Here's a Perl version tested on a file with well over 2000 lines:

Code:
perl -ne 'print "$_\n" if eof' file

# 11  
Old 12-30-2013
To add a newline at the end of the file:
Code:
xargs -d\n < file

# 12  
Old 01-05-2014
There seem to have been a lot of complex possibilities presented in this thread. Why not use something much simpler, for example:
Code:
echo >> file

# 13  
Old 01-06-2014
Thank you Gurus. Was able to achieve this functionality, appending \n to the end of file using Informatica.

Thank you again.
# 14  
Old 01-06-2014
The following will add a \n only if missing:
Code:
perl -lpe "" file

Write this back to the file with:
Code:
perl -i -lpe "" file
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