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_bc_user=bitcoin
_bc_group=bitcoin
post_install() {
_mkuser
# disable Copy-On-Write (btrfs directories only)
_dir="/var/lib/bitcoind"
mkdir -p "$_dir"
_is_btrfs "$_dir" && _disable_cow "$_dir"
if test ! -f /etc/bitcoin/bitcoin.conf; then
cp /etc/bitcoin/bitcoin.conf.dist /etc/bitcoin/bitcoin.conf
fi
chown -R $_bc_user:$_bc_group /etc/bitcoin "$_dir"
printf "%b\n" "$bitcoin"
}
post_upgrade() {
_mkuser
chown -R $_bc_user:$_bc_group /etc/bitcoin "/var/lib/bitcoind"
printf "%b\n" "$bitcoin"
}
post_remove() {
_rmuser
}
# ------------------------------------------------------------------------------
# helper functions for creating bitcoin user / group
# ------------------------------------------------------------------------------
_mkuser() {
getent passwd $_bc_user &>/dev/null || {
echo -n "Creating bitcoin user... "
grep -E "^$_bc_group:" /etc/group >/dev/null || groupadd $_bc_group
useradd -m -d /etc/bitcoin -g $_bc_group -s /usr/bin/nologin $_bc_user 2>/dev/null
echo "done"
}
}
_rmuser() {
echo -n "Removing bitcoin user... "
userdel $_bc_user 2>/dev/null
echo "done"
}
# ------------------------------------------------------------------------------
# helper functions for disabling btrfs Copy-On-Write (CoW)
# https://wiki.archlinux.org/index.php/Btrfs#Copy-On-Write_.28CoW.29
# ------------------------------------------------------------------------------
# check if dir is btrfs
_is_btrfs() {
if [[ $(findmnt --target $1 --output FSTYPE --noheadings) == 'btrfs' ]]; then
return 0
else
return 1
fi
}
# disable btrfs CoW
_chattrify() {
# original dir, with trailing slash stripped if it exists
_orig_dir=$( echo "$1" | sed 's@/$@@' )
# if original dir exists, back it up
[[ -d "$1" ]] && mv "$1" "${_orig_dir}"_old
# re-make original dir
mkdir -p "$1"
# set permissions on re-made dir
chmod "$2" "$1"
# disable btrfs CoW on re-made dir
chattr +C "$1"
# recursive copy to restore backed up dir while maintaining disabled CoW
[[ -d "${_orig_dir}"_old ]] \
&& find "${_orig_dir}"_old -mindepth 1 -maxdepth 1 -exec cp -R '{}' "$1" \;
# set ownership on re-made dir
chown -R $3:$4 "$1"
# purge backed up dir
[[ -d "${_orig_dir}"_old ]] && rm -rf "${_orig_dir}"_old
}
_disable_cow() {
_chattrify "$1" "750" "$_bc_user" "$_bc_group"
}
read -d '' bitcoin <<'EOF'
############################################################
# #
# Bitcoin Classic #
# ____________ #
# #
# To start bitcoin-classic: #
# #
# # systemctl start bitcoind #
# #
# To communicate with bitcoin-classic as a normal user: #
# #
# $ bitcoin-cli help #
# #
# Config: /etc/bitcoin/bitcoin.conf #
# Blockchain: /var/lib/bitcoind #
# #
############################################################
EOF
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