Korn Shell实现文件大小比较

#!/usr/bin/ksh# check pkg size# if the size is 5% greater than predecessor, then print warning message# else print the pkg size#set -xfilesize(){pkg=$1echo `du -k $pkg|tail -1|cut -f 1`}compare_pkgsize(){pkg1=$1pkg2=$2percentage=$3||5pkg1_size=`filesize $pkg1`pkg2_size=`filesize $pkg2`gt_percent $pkg1_size $pkg2_size $percentage}compare_label_pkgsize(){label1=$1label2=$2percentage=$3||5nightly_build_dir=$4||'/mot/proj/wibb_bts/daily/'label1_size=`filesize $nightly_build_dir/$label1`label2_size=`filesize $nightly_build_dir/$label2`gt_percent $label1_size $label2_size $percentage}gt_percent(){size1=$1size2=$2percentage=$3inc_size=`echo "$size1-$size2" | bc`inc_by_percent=`echo "scale=2;$size2*(1+$percentage/100)" | bc`#echo "increase size: $inc_size, increse by percent: $inc_by_percent"is_ge=`echo "$size1 $inc_by_percent" | awk '{printf "%d",$1-$2}'`#echo "is greater than: $is_ge"if [ $is_ge -ge 0 ]; thenecho "$size1 kb, predecessor $size2 kb, file size incresed $percentage percent than predecessor!"elseecho "$size1 kb"fi}if [ $# -lt 2 ]; thenecho '''Usage:cksize file1 file2 [percentage]'''exit 1fi#the comparation should depends on 2 files existingif [ -e "$1" ] && [ -e "$2" ]; thenif [ -n "$3" ]; thenpercentage=$3#echo "percentage: $percentage"elsepercentage=5ficompare_pkgsize $1 $2 $percentageelseecho "`filesize $1` kb"fi