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prisonparty: prevent overlapping setup/teardown

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ed 2023-11-25 14:03:41 +00:00
parent 43d409a5d9
commit 72e355eb2c
1 changed files with 4 additions and 0 deletions
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4
bin/prisonparty.sh
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@ -97,6 +97,7 @@ jail="${jail%/}"
# bind-mount system directories and volumes
for a in {1..30}; do mkdir "$jail/.prisonlock" && break; sleep 0.1; done
printf '%s\n' "${sysdirs[@]}" "${vols[@]}" | sed -r 's`/$``' | LC_ALL=C sort | uniq |
while IFS= read -r v; do
[ -e "$v" ] || {
@ -110,6 +111,7 @@ while IFS= read -r v; do
mkdir -p "$jail$v"
mount --bind "$v" "$jail$v"
done
rmdir "$jail/.prisonlock" || true
cln() {
@ -117,6 +119,7 @@ cln() {
wait -f -n $p && rv=0 || rv=$?
cd /
echo "stopping chroot..."
for a in {1..30}; do mkdir "$jail/.prisonlock" && break; sleep 0.1; done
lsof "$jail" 2>/dev/null | grep -F "$jail" &&
echo "chroot is in use; will not unmount" ||
{
@ -126,6 +129,7 @@ cln() {
umount "$v" && echo "umount OK: $v"
done
}
rmdir "$jail/.prisonlock" || true
exit $rv
}
trap cln EXIT