110 lines
2.7 KiB
Bash
Executable File
110 lines
2.7 KiB
Bash
Executable File
#!/bin/bash
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###############################################################################
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# You Don't Need Pi-hole
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# Network-wide DNS blocking without extra hardware.
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#
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# Project URL: https://codeberg.org/h3xx/you-dont-need-pihole
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#
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# License GPLv3: GNU GPL version 3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
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# with Commons Clause 1.0 (https://commonsclause.com/).
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# This is free software: you are free to change and redistribute it.
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# There is NO WARRANTY, to the extent permitted by law.
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# You may NOT use this software for commercial purposes.
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###############################################################################
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WORKDIR=${0%/*}
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CFG=$WORKDIR/update.cfg
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# Config defaults
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BACKUPSUFFIX=
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BLOCKLIST=$WORKDIR/block.list
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OUT=()
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URL=()
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DNSMASQ_RESTART_COMMAND=()
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if [[ -f $CFG ]]; then
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. "$CFG" || exit
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fi
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TEMP_DIR=$(mktemp -d -t "${0##*/}.XXXXXX")
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cleanup() {
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rm -fr -- "$TEMP_DIR"
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}
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trap 'cleanup' EXIT
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copy_perms() {
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local -r FROM=$1 TO=$2
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chmod --reference="$FROM" -- "$TO" || exit
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if [[ $UID -eq 0 ]]; then
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chown --reference="$FROM" -- "$TO" || exit
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fi
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}
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replace_with() {
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local -r ORIG=$1 NEW=$2
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if ! diff -q -- "$ORIG" "$NEW" &>/dev/null; then
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# There's a change
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if [[ -f $ORIG ]]; then
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copy_perms "$ORIG" "$NEW"
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if [[ -n $BACKUPSUFFIX ]]; then
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mv -- "$ORIG" "$ORIG$BACKUPSUFFIX" || exit
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fi
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else
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mkdir -p -- "${ORIG%/*}" || exit
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fi
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mv -- "$NEW" "$ORIG" || exit
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else
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printf 'File "%s" not modified\n' \
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"$ORIG" \
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>&2
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fi
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}
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(cd "$WORKDIR" &&
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git submodule update --init 'repos-noupdates/*' &&
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git submodule update --init --remote 'repos/*'
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) || exit
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for (( I = 0 ; I < ${#OUT[@]} ; ++I )); do
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MY_URL=${URL[$I]}
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MY_OUT=${OUT[$I]}
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if [[ -z $MY_URL ]]; then
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echo "$CFG: URL[$I] empty" >&2
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exit 2
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fi
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if [[ -z $MY_OUT ]]; then
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echo "$CFG: OUT[$I] empty" >&2
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exit 2
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fi
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TEMP_OUT=$(mktemp -p "$TEMP_DIR")
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wget \
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-O "$TEMP_OUT" \
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"$MY_URL" || exit
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replace_with "$MY_OUT" "$TEMP_OUT"
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done
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TEMP_BLOCKLIST=$(mktemp -p "$TEMP_DIR")
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"$WORKDIR/make-block.pl" --out="$TEMP_BLOCKLIST" || exit
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# Blocklist generation succeeded, install it!
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if [[ ! -e $BLOCKLIST ]]; then
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(
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# First time:
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# Create an empty blocklist with -rw-r--r-- permissions.
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# Prevents file not being readable; disregard permissions coming from
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# whatever file permissions 'mktemp' sets.
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umask 0022
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touch -- "$BLOCKLIST"
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) || exit
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fi
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replace_with "$BLOCKLIST" "$TEMP_BLOCKLIST"
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if [[ ${#DNSMASQ_RESTART_COMMAND[@]} -gt 0 ]]; then
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"${DNSMASQ_RESTART_COMMAND[@]}" || exit
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fi
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