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PiShrink
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Added cleanup function trap

This commit is contained in:
framp 2018-02-14 20:05:03 +01:00
parent 83e72eeec3
commit eda1092cc5
1 changed files with 7 additions and 1 deletions
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8
pishrink.sh
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@ -1,5 +1,9 @@
#!/bin/bash #!/bin/bash
function cleanup() {
losetup -d "$loopback" || true
}
usage() { echo "Usage: $0 [-s] imagefile.img [newimagefile.img]"; exit -1; } usage() { echo "Usage: $0 [-s] imagefile.img [newimagefile.img]"; exit -1; }
should_skip_autoexpand=false should_skip_autoexpand=false
@ -50,6 +54,9 @@ if [ -n "$2" ]; then
img="$2" img="$2"
fi fi
# cleanup at script exit
trap cleanup ERR EXIT
#Gather info #Gather info
beforesize=$(ls -lh "$img" | cut -d ' ' -f 5) beforesize=$(ls -lh "$img" | cut -d ' ' -f 5)
parted_output=$(parted -ms "$img" unit B print | tail -n 1) parted_output=$(parted -ms "$img" unit B print | tail -n 1)
@ -166,7 +173,6 @@ fi
sleep 1 sleep 1
#Shrink partition #Shrink partition
losetup -d "$loopback"
partnewsize=$(($minsize * $blocksize)) partnewsize=$(($minsize * $blocksize))
newpartend=$(($partstart + $partnewsize)) newpartend=$(($partstart + $partnewsize))
parted -s -a minimal "$img" rm $partnum >/dev/null parted -s -a minimal "$img" rm $partnum >/dev/null