Prompt claude-4.5 plus manual fixup

https://www.perplexity.ai/search/i-will-give-you-the-source-cod-gC4f5PhBQYeuk1GBVZ0Dnw#0

2 files changed, 182 insertions, 5 deletions

diff --git a/netns.diff b/netns.diff
new file mode 100644
index 0000000..4072b84
--- /dev/null
+++ b/netns.diff
@@ -0,0 +1,132 @@
+--- wg-quick.orig
++++ wg-quick
+@@ -24,6 +24,7 @@
+ SAVE_CONFIG=0
+ CONFIG_FILE=""
+ PROGRAM="${0##*/}"
+ ARGS=( "$@" )
++NETNS=""
+
+@@ -68,6 +69,20 @@
+ 	"$@"
+ }
+ 
++ensure_netns() {
++	[[ -z $NETNS ]] && return 0
++	if [[ ! -e /run/netns/$NETNS ]]; then
++		cmd ip netns add "$NETNS"
++	fi
++}
++
++move_to_netns() {
++	[[ -z $NETNS ]] && return 0
++	cmd ip link set "$INTERFACE" netns "$NETNS"
++}
++
+ die() {
+ 	echo "$PROGRAM: $*" >&2
+ 	exit 1
+
+@@ -169,11 +184,23 @@
+ 	local proto=-4
+ 	[[ $1 == *:* ]] && proto=-6
+-	cmd ip $proto route add "$1" dev "$INTERFACE" table "$TABLE"
++
++	if [[ -n $NETNS ]]; then
++		cmd ip -n "$NETNS" $proto route add "$1" dev "$INTERFACE" table "$TABLE"
++	else
++		cmd ip $proto route add "$1" dev "$INTERFACE" table "$TABLE"
++	fi
+ 	elif [[ $1 == */0 ]]; then
+ 		add_default "$1"
+ 	else
+-		[[ -n $(ip $proto route show dev "$INTERFACE" match "$1" 2>/dev/null) ]] || cmd ip $proto route add "$1" dev "$INTERFACE"
++		if [[ -n $NETNS ]]; then
++			[[ -n $(ip -n "$NETNS" $proto route show dev "$INTERFACE" match "$1" 2>/dev/null) ]] || cmd ip -n "$NETNS" $proto route add "$1" dev "$INTERFACE"
++		else
++			[[ -n $(ip $proto route show dev "$INTERFACE" match "$1" 2>/dev/null) ]] || cmd ip $proto route add "$1" dev "$INTERFACE"
++		fi
+ 	fi
+ }
+
+@@ -267,8 +294,18 @@
+ HAVE_SET_DNS=0
+ set_dns() {
+ 	[[ ${#DNS[@]} -gt 0 ]] || return 0
++	if [[ -n $NETNS ]]; then
++		local netns_resolv_dir="/etc/netns/$NETNS"
++		cmd mkdir -p "$netns_resolv_dir"
++		{ printf 'nameserver %s\n' "${DNS[@]}"
++		 [[ ${#DNS_SEARCH[@]} -eq 0 ]] || printf 'search %s\n' "${DNS_SEARCH[*]}"
++		} | cmd tee "$netns_resolv_dir/resolv.conf" > /dev/null
++	else
+ 	{ printf 'nameserver %s\n' "${DNS[@]}"
+ 	 [[ ${#DNS_SEARCH[@]} -eq 0 ]] || printf 'search %s\n' "${DNS_SEARCH[*]}"
+ 	} | cmd resolvconf -a "$(resolvconf_iface_prefix)$INTERFACE" -m 0 -x
++	fi
+ 	HAVE_SET_DNS=1
+ }
+
+@@ -276,6 +313,11 @@
+ unset_dns() {
+ 	[[ ${#DNS[@]} -gt 0 ]] || return 0
++	if [[ -n $NETNS ]]; then
++		local netns_resolv="/etc/netns/$NETNS/resolv.conf"
++		[[ -f $netns_resolv ]] && cmd rm -f "$netns_resolv"
++		return 0
++	fi
+ 	cmd resolvconf -d "$(resolvconf_iface_prefix)$INTERFACE" -f
+ }
+
+@@ -431,7 +473,7 @@
+ 
+ cmd_usage() {
+ 	cat >&2 <<-_EOF
+-	Usage: $PROGRAM [ up | down | save | strip ] [ CONFIG_FILE | INTERFACE ]
++	Usage: $PROGRAM [ up | down | save | strip ] [ CONFIG_FILE | INTERFACE ] [ NETNS ]
+ 
+ 	 CONFIG_FILE is a configuration file, whose filename is the interface name
+ 	 followed by \`.conf'. Otherwise, INTERFACE is an interface name, with
+
+@@ -462,9 +504,11 @@
+ cmd_up() {
+ 	local i
+ 	[[ -z $(ip link show dev "$INTERFACE" 2>/dev/null) ]] || die "\`$INTERFACE' already exists"
++	ensure_netns
+ 	trap 'del_if; exit' INT TERM EXIT
+ 	add_if
+ 	execute_hooks "${PRE_UP[@]}"
++	move_to_netns
+ 	set_config
+ 	for i in "${ADDRESSES[@]}"; do
+ 		add_addr "$i"
+@@ -503,16 +547,28 @@
+ if [[ $# -eq 1 && ( $1 == --help || $1 == -h || $1 == help ) ]]; then
+ 	cmd_usage
+ elif [[ $# -eq 2 && $1 == up ]]; then
++	auto_su
++	parse_options "$2"
++	cmd_up
++elif [[ $# -eq 3 && $1 == up ]]; then
+ 	auto_su
+ 	parse_options "$2"
++	NETNS="$3"
+ 	cmd_up
+ elif [[ $# -eq 2 && $1 == down ]]; then
++	auto_su
++	parse_options "$2"
++	cmd_down
++elif [[ $# -eq 3 && $1 == down ]]; then
+ 	auto_su
+ 	parse_options "$2"
++	NETNS="$3"
+ 	cmd_down
+ elif [[ $# -eq 2 && $1 == save ]]; then
+ 	auto_su
+ 	parse_options "$2"
+ 	cmd_save
+ elif [[ $# -eq 2 && $1 == strip ]]; then
++	auto_su
+ 	parse_options "$2"
+ 	cmd_strip
+ else
diff --git a/wg-quick b/wg-quick
index 93df80d..1325109 100755
--- a/wg-quick
+++ b/wg-quick
@@ -26,12 +26,26 @@ SAVE_CONFIG=0
 CONFIG_FILE=""
 PROGRAM="${0##*/}"
 ARGS=( "$@" )
+NETNS=""
 
 cmd() {
 	echo "[#] $*" >&2
 	"$@"
 }
 
+ensure_netns() {
+	[[ -z $NETNS ]] && return 0
+	if [[ ! -e /run/netns/$NETNS ]]; then
+		cmd ip netns add "$NETNS"
+	fi
+}
+
+move_to_netns() {
+	[[ -z $NETNS ]] && return 0
+	cmd ip link set "$INTERFACE" netns "$NETNS"
+}
+
+
 die() {
 	echo "$PROGRAM: $*" >&2
 	exit 1
@@ -153,6 +167,16 @@ resolvconf_iface_prefix() {
 HAVE_SET_DNS=0
 set_dns() {
 	[[ ${#DNS[@]} -gt 0 ]] || return 0
+	if [[ -n $NETNS ]]; then
+		local netns_resolv_dir="/etc/netns/$NETNS"
+		cmd mkdir -p "$netns_resolv_dir"
+		# TODO make this not jank
+		{ printf 'nameserver %s\n' "${DNS[@]}"
+		 [[ ${#DNS_SEARCH[@]} -eq 0 ]] || printf 'search %s\n' "${DNS_SEARCH[*]}"
+		} | cmd tee "$netns_resolv_dir/resolv.conf" > /dev/null
+		HAVE_SET_DNS=1
+		return 0
+	fi
 	{ printf 'nameserver %s\n' "${DNS[@]}"
 	  [[ ${#DNS_SEARCH[@]} -eq 0 ]] || printf 'search %s\n' "${DNS_SEARCH[*]}"
 	} | cmd resolvconf -a "$(resolvconf_iface_prefix)$INTERFACE" -m 0 -x
@@ -161,6 +185,11 @@ set_dns() {
 
 unset_dns() {
 	[[ ${#DNS[@]} -gt 0 ]] || return 0
+	if [[ -n $NETNS ]]; then
+		local netns_resolv="/etc/netns/$NETNS/resolv.conf"
+		[[ -f $netns_resolv ]] && cmd rm -f "$netns_resolv"
+		return 0
+	fi
 	cmd resolvconf -d "$(resolvconf_iface_prefix)$INTERFACE" -f
 }
 
@@ -170,11 +199,19 @@ add_route() {
 	[[ $TABLE != off ]] || return 0
 
 	if [[ -n $TABLE && $TABLE != auto ]]; then
-		cmd ip $proto route add "$1" dev "$INTERFACE" table "$TABLE"
+		if [[ -n $NETNS ]]; then
+			cmd ip -n "$NETNS" $proto route add "$1" dev "$INTERFACE" table "$TABLE"
+		else
+			cmd ip $proto route add "$1" dev "$INTERFACE" table "$TABLE"
+		fi
 	elif [[ $1 == */0 ]]; then
 		add_default "$1"
 	else
-		[[ -n $(ip $proto route show dev "$INTERFACE" match "$1" 2>/dev/null) ]] || cmd ip $proto route add "$1" dev "$INTERFACE"
+		if [[ -n $NETNS ]]; then
+			[[ -n $(ip -n "$NETNS" $proto route show dev "$INTERFACE" match "$1" 2>/dev/null) ]] || cmd ip -n "$NETNS" $proto route add "$1" dev "$INTERFACE"
+		else
+			[[ -n $(ip $proto route show dev "$INTERFACE" match "$1" 2>/dev/null) ]] || cmd ip $proto route add "$1" dev "$INTERFACE"
+		fi
 	fi
 }
 
@@ -298,7 +335,7 @@ execute_hooks() {
 
 cmd_usage() {
 	cat >&2 <<-_EOF
-	Usage: $PROGRAM [ up | down | save | strip ] [ CONFIG_FILE | INTERFACE ]
+	Usage: $PROGRAM [ up | down | save | strip ] [ CONFIG_FILE | INTERFACE ] [ NETNS ]
 
 	  CONFIG_FILE is a configuration file, whose filename is the interface name
 	  followed by \`.conf'. Otherwise, INTERFACE is an interface name, with
@@ -326,9 +363,11 @@ cmd_usage() {
 cmd_up() {
 	local i
 	[[ -z $(ip link show dev "$INTERFACE" 2>/dev/null) ]] || die "\`$INTERFACE' already exists"
+	ensure_netns
 	trap 'del_if; exit' INT TERM EXIT
 	add_if
 	execute_hooks "${PRE_UP[@]}"
+	move_to_netns
 	set_config
 	for i in "${ADDRESSES[@]}"; do
 		add_addr "$i"
@@ -365,13 +404,19 @@ cmd_strip() {
 
 if [[ $# -eq 1 && ( $1 == --help || $1 == -h || $1 == help ) ]]; then
 	cmd_usage
-elif [[ $# -eq 2 && $1 == up ]]; then
+elif [[ $# -ge 2 && $1 == up ]]; then
 	auto_su
 	parse_options "$2"
+	if [[ $# -eq 3 ]]; then
+		NETNS="$3"
+	fi
 	cmd_up
-elif [[ $# -eq 2 && $1 == down ]]; then
+elif [[ $# -ge 2 && $1 == down ]]; then
 	auto_su
 	parse_options "$2"
+	if [[ $# -eq 3 ]]; then
+		NETNS="$3"
+	fi
 	cmd_down
 elif [[ $# -eq 2 && $1 == save ]]; then
 	auto_su