Need to convert \n character to newline in UNIX.


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# 1  
Need to convert \n character to newline in UNIX.

I have a variable like below:

Code:
str1="10.9.11.128\n-rwxr-xr-x user1 2019-12-29 17:53 /var/branch/custom/tg.xml 286030210\n10.9.12.129\n-rwxr-xr-x user1 2019-12-29 17:53 /app/branch/custom/tg.xml 286030210\n10.9.20.130\n-rwxr-xr-x user1 2019-12-29 17:53 /web/branch/custom/tg.xml 286030210"

I redirect this string to a file and then access the file using web browser like below.

Code:
echo $str1 > text.txt

http://localhost/text.txt

I see the output in the web browser as:

Code:
10.9.11.128\n-rwxr-xr-x user1 2019-12-29 17:53 /var/branch/custom/tg.xml 286030210\n10.9.12.129\n-rwxr-xr-x user1 2019-12-29 17:53 /app/branch/custom/tg.xml 286030210\n10.9.20.130\n-rwxr-xr-x user1 2019-12-29 17:53 /web/branch/custom/tg.xml 286030210

However, my requirement is to convert \n to a new line to the text.txt file in the browser should look like this:
Code:
10.9.11.128
-rwxr-xr-x user1 2019-12-29 17:53 /var/branch/custom/tg.xml 286030210
10.9.12.129
-rwxr-xr-x user1 2019-12-29 17:53 /app/branch/custom/tg.xml 286030210
10.9.20.130
-rwxr-xr-x user1 2019-12-29 17:53 /web/branch/custom/tg.xml 286030210

Can you please suggest how can I change my string str1 to meet expected output ? I'm looking for a POSIX solution especially not an awk solution.

Last edited by mohtashims; 01-02-2020 at 01:37 AM..
# 2  
Code:
echo $str1 | sed 's/\\n/\n/g' > text.txt

This User Gave Thanks to Aia For This Post:
# 3  
Hi
just add option
Code:
echo -e $str1 > text.txt

This User Gave Thanks to nezabudka For This Post:
# 4  
Works Smilie Thank you.
# 5  
Be careful with echo and with unquoted variables in command arguments!
From [Tip] A better echo
Code:
# Portable echo -e
echo_e() {
  ( IFS=" "; printf "%b\n" "$*" )
}

echo_e "$str1"

Or use printf directly
Code:
printf "%b\n" "$str1"

These 2 Users Gave Thanks to MadeInGermany For This Post:
# 6  
You could use this bashism (?; don't know about other shells) in the first place. man bash:
Quote:
QUOTING . . .
Words of the form $'string' are treated specially. The word expands to string, with backslash-escaped characters replaced as specified by the ANSI C standard.
Code:
str1=$'10.9.11.128\n-rwxr-xr-x user1 2019-12-29 17:53 /var/branch/custom/tg.xml 286030210\n10.9.12.129\n-rwxr-xr-x user1 2019-12-29 17:53 /app/branch/custom/tg.xml 286030210\n10.9.20.130\n-rwxr-xr-x user1 2019-12-29 17:53 /web/branch/custom/tg.xml 286030210'
echo "$str1"
10.9.11.128
-rwxr-xr-x user1 2019-12-29 17:53 /var/branch/custom/tg.xml 286030210
10.9.12.129
-rwxr-xr-x user1 2019-12-29 17:53 /app/branch/custom/tg.xml 286030210
10.9.20.130
-rwxr-xr-x user1 2019-12-29 17:53 /web/branch/custom/tg.xml 286030210

This User Gave Thanks to RudiC For This Post:
# 7  
Would changing echo to printf work?
Code:
printf "$str1" > text.txt



Robin
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