Thread: Compressing argument files

Hey everyone, i need to write a script that accepts a file as an argument and then compresses this file with bzip2 gzip and zip. I'm trying to get the output to be a sorted table which displays the file size before compression and after compression for each compression program.

e.g. output:

File: ff
bzip2 174145 13976
gzip 174145 11746
zip 174145 11879

The code I have so far is listed below, however the output is an absolute mess and i've confused the hell out of myself!
Anyone able to help me?
Regards

Code:

#!bin/sh


arg="$1"


# Get the original file size
file_size=$(stat -c'%s' $arg)
echo "$file_size"


# Get sizes
gzip=$(gzip -c "$arg" | wc -c)    
zip=$(zip -c "$arg" | wc -c)
bzip2=$(bzip2 -c "$arg" | wc - c)


# Unsorted output
echo "gzip $file_size $gzip" >> output.txt
echo "zip $file_size $zip" >> output.txt
echo "bzip2 $file_size $bzip2" >> output.txt


#sorted list
sort -n -r +3 -4 output.txt > sorted.txt
cat sorted.txt

Hi,
i think you need to use printf instead of echo
see following examples :

PHP Code:

#!bin/sh


arg="$1"


# Get the original file size
file_size=$(stat -c'%s' $arg)
#echo "$file_size"


# Get sizes
gzip=$(zcat -c "$arg" | wc -c)
# zip=$(zip -c "$arg" | wc -c)
bzip2=$(bzip2 -c "$arg" | wc -c)

header="\n %-10s\t%8s\t %10s\t%11s\n"
format=" %-10s\t%08d\t%10s\n"
width=43
printf "%$width.${width}s\n" "$divider"


# Unsorted output
printf "$header"  "TOOL" "FILE_SIZE" "COMPRESS_SIZE" >> output.txt
echo "=========================================="
# printf "$format"  "gzip $file_size $gzip"
printf "$format"   "gzip"  "$file_size" "$gzip" >> output.txt
# printf "$format"  "zip $file_size $zip" >> output.txt
printf "$format"  "bzip2" "$file_size" "$bzip2" >> output.txt


#sorted list
# sort -n -r +3 -4 output.txt > sorted.txt
# cat sorted.txt
cat output.txt 


i commented this " zip -c "$arg" | wc -c" because this command not working properly