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PiShrink
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add -i flag to shrink first and copy after

This commit is contained in:
Csaba Kiraly 2016-11-24 15:38:11 +01:00
parent bb3982edfd
commit ae83ca90ef
1 changed files with 23 additions and 3 deletions
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26
pishrink.sh
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@ -1,12 +1,14 @@
#!/bin/bash #!/bin/bash
usage() { echo "Usage: $0 [-s] imagefile.img [newimagefile.img]"; exit -1; } usage() { echo "Usage: $0 [-s] [-i] imagefile.img [newimagefile.img]"; exit -1; }
should_skip_autoexpand=false should_skip_autoexpand=false
force_inplace_and_copy_after=false
while getopts ":s" opt; do while getopts ":s:i" opt; do
case "${opt}" in case "${opt}" in
s) should_skip_autoexpand=true ;; s) should_skip_autoexpand=true ;;
i) force_inplace_and_copy_after=true ;;
*) usage ;; *) usage ;;
esac esac
done done
@ -36,7 +38,7 @@ if (( $? != 0 )); then
fi fi
#Copy to new file if requested #Copy to new file if requested
if [ -n "$2" ]; then if [ -n "$2" -a "$force_inplace_and_copy_after" = false ]; then
echo "Copying $1 to $2..." echo "Copying $1 to $2..."
if [[ -f $img ]]; then if [[ -f $img ]]; then
cp --reflink=auto --sparse=always "$1" "$2" cp --reflink=auto --sparse=always "$1" "$2"
@ -162,3 +164,21 @@ if [[ -f $img ]]; then
aftersize=`ls -lah $img | cut -d ' ' -f 5` aftersize=`ls -lah $img | cut -d ' ' -f 5`
echo "Shrunk $img from $beforesize to $aftersize" echo "Shrunk $img from $beforesize to $aftersize"
fi fi
#Copy to new file if requested
if [ -n "$2" -a "$force_inplace_and_copy_after" = true ]; then
echo "Copying $1 to $2..."
if [[ -f $img ]]; then
cp --reflink=auto --sparse=always "$1" "$2"
else
imgsize=`parted -m $img unit B print | tail -1 | cut -d ':' -f 3 | tr -d 'B\n'`
imgsize=`expr $imgsize + 1`
dd if="$1" of="$2" conv=sparse count=$imgsize iflag=count_bytes bs=1M
fi
if (( $? != 0 )); then
echo "ERROR: Could not copy file..."
exit -5
fi
img=$2
fi