mirror of
https://github.com/arthur-pbty/arthur-os.git
synced 2026-08-01 20:28:16 +02:00
134 lines
3.3 KiB
Bash
Executable File
134 lines
3.3 KiB
Bash
Executable File
#!/bin/bash
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# omarchy:summary=Show or configure the system DNS provider
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# omarchy:args=[Cloudflare|Google|DHCP|Custom]
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# omarchy:examples=omarchy dns | omarchy dns Cloudflare | omarchy dns Custom
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set -euo pipefail
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current_dns_provider() {
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local dns=""
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local compact=""
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dns=$(awk -F= '
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/^[[:space:]]*#/ { next }
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/^[[:space:]]*DNS[[:space:]]*=/ {
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value=$0
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sub(/^[^=]*=/, "", value)
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print value
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exit
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}
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' /etc/systemd/resolved.conf 2>/dev/null || true)
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compact=$(printf '%s' "$dns" | tr -d '[:space:]')
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if [[ -z $compact ]]; then
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echo "DHCP"
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elif [[ $dns == *"cloudflare-dns.com"* || $dns == *"1.1.1.1"* || $dns == *"2606:4700:4700::1111"* ]]; then
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echo "Cloudflare"
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elif [[ $dns == *"dns.google"* || $dns == *"8.8.8.8"* || $dns == *"2001:4860:4860::8888"* ]]; then
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echo "Google"
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else
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echo "Custom"
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fi
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}
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require_root() {
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if (( EUID != 0 )); then
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exec pkexec omarchy-dns "$@"
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fi
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}
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lock_dns_to_resolved() {
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local file=""
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for file in /etc/systemd/network/*.network; do
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[[ -f $file ]] || continue
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if ! grep -q "^\[DHCPv4\]" "$file"; then continue; fi
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if ! sed -n '/^\[DHCPv4\]/,/^\[/p' "$file" | grep -q "^UseDNS="; then
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sed -i '/^\[DHCPv4\]/a UseDNS=no' "$file"
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fi
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if grep -q "^\[IPv6AcceptRA\]" "$file" && ! sed -n '/^\[IPv6AcceptRA\]/,/^\[/p' "$file" | grep -q "^UseDNS="; then
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sed -i '/^\[IPv6AcceptRA\]/a UseDNS=no' "$file"
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fi
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done
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}
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unlock_dns_to_dhcp() {
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local file=""
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for file in /etc/systemd/network/*.network; do
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[[ -f $file ]] || continue
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sed -i '/^\[DHCPv4\]/{n;/^UseDNS=no$/d}' "$file"
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sed -i '/^\[IPv6AcceptRA\]/{n;/^UseDNS=no$/d}' "$file"
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done
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}
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if (( $# == 0 )); then
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current_dns_provider
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exit 0
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fi
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provider="$1"
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case "$provider" in
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Cloudflare)
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require_root "$provider"
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tee /etc/systemd/resolved.conf >/dev/null <<'EOF'
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[Resolve]
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DNS=1.1.1.1#cloudflare-dns.com 1.0.0.1#cloudflare-dns.com 2606:4700:4700::1111#cloudflare-dns.com 2606:4700:4700::1001#cloudflare-dns.com
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FallbackDNS=9.9.9.9#dns.quad9.net 149.112.112.112#dns.quad9.net 2620:fe::fe#dns.quad9.net 2620:fe::9#dns.quad9.net
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DNSOverTLS=opportunistic
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EOF
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lock_dns_to_resolved
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;;
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Google)
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require_root "$provider"
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tee /etc/systemd/resolved.conf >/dev/null <<'EOF'
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[Resolve]
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DNS=8.8.8.8#dns.google 8.8.4.4#dns.google 2001:4860:4860::8888#dns.google 2001:4860:4860::8844#dns.google
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FallbackDNS=9.9.9.9#dns.quad9.net 149.112.112.112#dns.quad9.net 2620:fe::fe#dns.quad9.net 2620:fe::9#dns.quad9.net
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DNSOverTLS=opportunistic
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EOF
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lock_dns_to_resolved
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;;
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DHCP)
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require_root "$provider"
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tee /etc/systemd/resolved.conf >/dev/null <<'EOF'
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[Resolve]
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DNSOverTLS=no
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EOF
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unlock_dns_to_dhcp
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;;
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Custom)
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require_root "$provider"
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echo "Enter your DNS servers (space-separated, e.g. '192.168.1.1 1.1.1.1'):"
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if ! read -r dns_servers; then
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dns_servers=""
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fi
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if [[ -z $dns_servers ]]; then
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echo "Error: No DNS servers provided." >&2
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exit 1
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fi
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tee /etc/systemd/resolved.conf >/dev/null <<EOF
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[Resolve]
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DNS=$dns_servers
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FallbackDNS=9.9.9.9#dns.quad9.net 149.112.112.112#dns.quad9.net 2620:fe::fe#dns.quad9.net 2620:fe::9#dns.quad9.net
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EOF
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lock_dns_to_resolved
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;;
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*)
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echo "Usage: omarchy-dns [Cloudflare|Google|DHCP|Custom]" >&2
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exit 1
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;;
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esac
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systemctl restart systemd-networkd systemd-resolved
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