Get a value from a file and insert it in a different file
I have a file that contains attribute values, for example, name.out has
Code:
Alice
Bob
Cathy
etc.
I also have a template file for each of name values. I have already created all the files for each name, for sample,
Code:
add.Alice.ldif
add.Bob.ldif
add.Cathy.ldif
etc.
Each of the ldif file has an entry like
Code:
Name=FFFFF
I will need to read the names from the name.out file, and replace dummy name FFFFF with the actual name. At the completion, I should have add.Alice.ldif contains Name=Alice, add.Bob.ldif contains Name=Bob.
So I created the following sh file.
Code:
file="/tmp/name.out"
while IFS= read -r line
do
echo "---------------Change $line:"
sed -i 's/FFFFF/$line/g' /tmp/add.$line.ldif
read -p "Press [Enter] key to continue..."
done <"$file"
When I run the sh file, the names are displayed correctly on the screen, however, they are not written to the ldif files correctly. The ldif files has
Code:
Name=$line (expect Alice)
I probably have missed something. How can I fix it? Thanks.
file="/tmp/name.out"
while IFS= read -r line
do
echo "---------------Change $line:"
sed -i "s/FFFFF/$line/g" /tmp/loadfilt/load.$line.ldif
read -p "Press [Enter] key to continue..."
done <"$file"
The double quotes should evaluate the variable to its actual value instead of using it as is.
Thanks
Bhushan Pathak
Last edited by BhushanPathak; 05-03-2013 at 11:56 AM..
Reason: Not sure how FFFFF got changed to some other text
Thank you. Double quotes solved the problem. read -p "Press [Enter] key to continue..." doesn't work. It does not pause the script and wait for me to enter the "Enter" key to continue.
Not sure why read command is not working for you. It works fine for me. Is it necessary that the script should wait for you to hit enter key every time [in each loop]?
Both read's are reading from standard input, which is being "fed" by <"$file" in your script.
Here's a couple of options:
Code:
file="/tmp/name.out"
exec 3<"$file"
while read line <&3 # same as "while read -u3 line"
do
echo "---------------Change $line:"
sed -i "s/FFFFF/$line/g" /tmp/loadfilt/load.$line.ldif
printf "Press [Enter] key to continue..."
read
done
Code:
file="/tmp/name.out"
exec 3</dev/tty
while read line
do
echo "---------------Change $line:"
sed -i "s/FFFFF/$line/g" /tmp/loadfilt/load.$line.ldif
printf "Press [Enter] key to continue..."
read -u3
done < "$file"
I tried the second option and it works (haven't tried the first one). I don't understand what
Code:
exec 3</dev/tty
, and
Code:
read -u3
mean. Is it possible for me to get some explanations? Thanks.
(I don't have to write "Enter" in this specific case, but think later I may need to expand the code to include more functions, so it is better for me to learn now.)
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