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PiShrink
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Remove the use of awk 

The awks being used were not reliably giving the correct data across different distros. They were
replaced with cut and tr, this should give the script better stability.
This commit is contained in:
Drew Bonasera 2016-04-27 02:10:23 -04:00
parent 33aeacb375
commit f4282842da
1 changed files with 3 additions and 5 deletions
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8
pishrink.sh
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@ -30,9 +30,7 @@ fi
#Gather info #Gather info
beforesize=`ls -lah $img | cut -d ' ' -f 5` beforesize=`ls -lah $img | cut -d ' ' -f 5`
partinfo=`parted -m $img unit B print` partstart=`parted -m $img unit B print | tail -n 1 | cut -d ':' -f 2 | tr -d 'B\n'`
partnumber=`echo "$partinfo" | grep ext4 | awk -F: ' { print $img } '`
partstart=`echo "$partinfo" | grep ext4 | awk -F: ' { print substr($2,0,length($2)-1) } '`
loopback=`losetup -f --show -o $partstart $img` loopback=`losetup -f --show -o $partstart $img`
#Make pi expand rootfs on next boot #Make pi expand rootfs on next boot
@ -54,7 +52,7 @@ umount $mountdir
#Shrink filesystem #Shrink filesystem
e2fsck -f $loopback e2fsck -f $loopback
minsize=`resize2fs -P $loopback | awk -F': ' ' { print $2 } '` minsize=`resize2fs -P $loopback | cut -d ':' -f 2 | tr -d ' '`
minsize=`echo $minsize+20000 | bc` minsize=`echo $minsize+20000 | bc`
resize2fs -p $loopback $minsize resize2fs -p $loopback $minsize
if [[ $? != 0 ]]; then if [[ $? != 0 ]]; then
@ -75,7 +73,7 @@ part1=`parted $img rm 2`
part2=`parted $img unit B mkpart primary $partstart $newpartend` part2=`parted $img unit B mkpart primary $partstart $newpartend`
#Truncate the file #Truncate the file
endresult=`parted -m $img unit B print free | tail -1 | awk -F: ' { print substr($2,0,length($2)-1) } '` endresult=`parted -m $img unit B print free | tail -1 | cut -d ':' -f 2 | tr -d 'B\n'`
truncate -s $endresult $img truncate -s $endresult $img
aftersize=`ls -lah $img | cut -d ' ' -f 5` aftersize=`ls -lah $img | cut -d ' ' -f 5`