I am using sed within a while loop to remove the trailing blank spaces from a file containing a list of files. The blank spaces are being removed. But I'm getting the message sed:no input files.
Following is the while loop I am using:
while IFS= read -r line;
do
echo "tester: $line"
sed -i 's/\s*$//' $line ;
done < file_list.txt
As Ipor and glenn have both said, based on your report from B Layer's comment regarding tail -1 file_list.txt, since there is a blank line at the end of that file, when the while loop reads that blank line, the $line variable gets assigned an empty value, leaving no filename for sed to process.
$ cat i
file1
file2
$ while IFS= read -r line; do printf -- "-->%s<--\n" "$line"; done < i
-->file1<--
-->file2<--
--><--
The fix here is to delete that trailing blank line from file_list.txt, or wrap a test around your actual processing to test for the existence of the file:
# do ...
if [ -f "$line" ]
then
# process file
fi
# done ...
Had same issue, for me it was because I did not pass the input file to sed CMD
Example:
boy=$1
boy2=$2
boy3=$3
while IFS="," read -r col1 col2
do
if [ "$col1" == "oke" ]; then
sed -i "s/$col2/$boy/g" test.txt
fi
done < test.txt
file_list.txt?tail -1 file_list.txt? If you don't see anything except an empty line then you need to delete that empty line.