doasedit/doasedit

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2021-01-30 17:30:41 -05:00
#!/bin/sh
destfile_pfx="$(cat /dev/urandom | tr -cd 'a-f0-9' | head -c 32)"
while [ -d "/tmp/doasedit/$destfile_pfx" ]; do
destfile_pfx="$(cat /dev/urandom | tr -cd 'a-f0-9' | head -c 32)"
done
mkdir -p /tmp/doasedit/$destfile_pfx
srcfile="$(realpath $1)"
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if [ -f "$srcfile" ]; then
doas cp $srcfile /tmp/doasedit/$destfile_pfx/edit
doas chown -R $USER:$USER /tmp/doasedit/$destfile_pfx/edit
doas cp $srcfile /tmp/doasedit/$destfile_pfx/file
else
# create file with "regular" system permissions (root:root 644)
touch /tmp/doasedit/$destfile_pfx/file
doas chown root:root /tmp/doasedit/$destfile_pfx/file
fi
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$EDITOR /tmp/doasedit/$destfile_pfx/edit
cat /tmp/doasedit/$destfile_pfx/edit | doas tee /tmp/doasedit/$destfile_pfx/file 1>/dev/null
if cmp -s "/tmp/doasedit/$destfile_pfx/file" "$srcfile"; then
echo "Skipping write; no changes."
else
doas mv -f /tmp/doasedit/$destfile_pfx/file $srcfile
fi
rm -rf /tmp/doasedit/$destfile_pfx