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2 questions
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votes
1
answer
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Difference in `< <(cat file)` and `<file` feeding loop
I saw the following example for reading a file in a bash script:
while read IP; do
${IPTABLES} -I INPUT -s "${IP}" -j DROP
done < <(cat "${BLACKLIST}")
but I'd have thought to do the ...
- 1,435
3
votes
2
answers
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Bash's cat, while, let and pipe lead to strange scoping behavior
So here's my script :
count=0
cat myfile | while read line
do
#some stuff...
let count++
echo $count
done
echo $count
The last echo statement output 0 instead of the number of lines in ...
- 1,568