wg-quick: support FreeBSD/Darwin search path

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

src/completion/wg-quick.bash-completion

@@ -2,18 +2,24 @@
 # Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 
 _wg_quick_completion() {
-	local i a
+	local p i a search_paths
+	search_paths=( /etc/wireguard )
+
+	[[ $OSTYPE == *freebsd* || $OSTYPE == *darwin* ]] && search_paths+=( /usr/local/etc/wireguard )
+
 	if [[ $COMP_CWORD -eq 1 ]]; then
 		COMPREPLY+=( $(compgen -W "up down" -- "${COMP_WORDS[1]}") )
 	elif [[ $COMP_CWORD -eq 2 ]]; then
 		if [[ ${COMP_WORDS[1]} == up ]]; then
 			local old_glob="$(shopt -p nullglob)"
 			shopt -s nullglob
-			for i in /etc/wireguard/*.conf; do
+			for p in "${search_paths[@]}"; do
+				for i in "$p"/*.conf; do
 					i="${i##*/}"; i="${i%.conf}"
 					mapfile -t a < <(compgen -W "$i" -- "${COMP_WORDS[2]}")
 					COMPREPLY+=( "${a[@]}" )
 				done
+			done
 			eval "$old_glob"
 			mapfile -t a < <(compgen -f -X '!*.conf' -- "${COMP_WORDS[2]}")
 			COMPREPLY+=( "${a[@]}" )

src/man/wg-quick.8

@@ -31,7 +31,8 @@ interface without bringing the interface down.
 
 \fICONFIG_FILE\fP is a configuration file, whose filename is the interface name
 followed by `.conf'. Otherwise, \fIINTERFACE\fP is an interface name, with configuration
-found at `/etc/wireguard/\fIINTERFACE\fP.conf'.
+found at `/etc/wireguard/\fIINTERFACE\fP.conf', searched first, followed by distro-specific
+search paths.
 
 Generally speaking, this utility is just a simple script that wraps invocations to
 .BR wg (8)

src/wg-quick/darwin.bash

@@ -40,10 +40,16 @@ die() {
 
 [[ ${BASH_VERSINFO[0]} -ge 4 ]] || die "Version mismatch: bash ${BASH_VERSINFO[0]} detected, when bash 4+ required"
 
+CONFIG_SEARCH_PATHS=( /etc/wireguard /usr/local/etc/wireguard )
+
 parse_options() {
-	local interface_section=0 line key value stripped
+	local interface_section=0 line key value stripped path
 	CONFIG_FILE="$1"
-	[[ $CONFIG_FILE =~ ^[a-zA-Z0-9_=+.-]{1,15}$ ]] && CONFIG_FILE="/etc/wireguard/$CONFIG_FILE.conf"
+	if [[ $CONFIG_FILE =~ ^[a-zA-Z0-9_=+.-]{1,15}$ ]]; then
+		for path in "${CONFIG_SEARCH_PATHS[@]}"; do
+			[[ -e $path/$CONFIG_FILE.conf ]] && { CONFIG_FILE="$path/$CONFIG_FILE.conf"; break; }
+		done
+	fi
 	[[ -e $CONFIG_FILE ]] || die "\`$CONFIG_FILE' does not exist"
 	[[ $CONFIG_FILE =~ (^|/)([a-zA-Z0-9_=+.-]{1,15})\.conf$ ]] || die "The config file must be a valid interface name, followed by .conf"
 	CONFIG_FILE="$(cd "${CONFIG_FILE%/*}" && pwd -P)/${CONFIG_FILE##*/}"
@@ -380,9 +386,11 @@ cmd_usage() {
 
 	  CONFIG_FILE is a configuration file, whose filename is the interface name
 	  followed by \`.conf'. Otherwise, INTERFACE is an interface name, with
-	  configuration found at /etc/wireguard/INTERFACE.conf. It is to be readable
-	  by wg(8)'s \`setconf' sub-command, with the exception of the following additions
-	  to the [Interface] section, which are handled by $PROGRAM:
+	  configuration found at:
+	  ${CONFIG_SEARCH_PATHS[@]/%//INTERFACE.conf}.
+	  It is to be readable by wg(8)'s \`setconf' sub-command, with the exception
+	  of the following additions to the [Interface] section, which are handled
+	  by $PROGRAM:
 
 	  - Address: may be specified one or more times and contains one or more
 	    IP addresses (with an optional CIDR mask) to be set for the interface.

src/wg-quick/freebsd.bash

@@ -38,10 +38,16 @@ die() {
 	exit 1
 }
 
+CONFIG_SEARCH_PATHS=( /etc/wireguard /usr/local/etc/wireguard )
+
 parse_options() {
-	local interface_section=0 line key value stripped
+	local interface_section=0 line key value stripped path
 	CONFIG_FILE="$1"
-	[[ $CONFIG_FILE =~ ^[a-zA-Z0-9_=+.-]{1,15}$ ]] && CONFIG_FILE="/etc/wireguard/$CONFIG_FILE.conf"
+	if [[ $CONFIG_FILE =~ ^[a-zA-Z0-9_=+.-]{1,15}$ ]]; then
+		for path in "${CONFIG_SEARCH_PATHS[@]}"; do
+			[[ -e $path/$CONFIG_FILE.conf ]] && { CONFIG_FILE="$path/$CONFIG_FILE.conf"; break; }
+		done
+	fi
 	[[ -e $CONFIG_FILE ]] || die "\`$CONFIG_FILE' does not exist"
 	[[ $CONFIG_FILE =~ (^|/)([a-zA-Z0-9_=+.-]{1,15})\.conf$ ]] || die "The config file must be a valid interface name, followed by .conf"
 	CONFIG_FILE="$(readlink -f "$CONFIG_FILE")"
@@ -334,9 +340,11 @@ cmd_usage() {
 
 	  CONFIG_FILE is a configuration file, whose filename is the interface name
 	  followed by \`.conf'. Otherwise, INTERFACE is an interface name, with
-	  configuration found at /etc/wireguard/INTERFACE.conf. It is to be readable
-	  by wg(8)'s \`setconf' sub-command, with the exception of the following additions
-	  to the [Interface] section, which are handled by $PROGRAM:
+	  configuration found at:
+	  ${CONFIG_SEARCH_PATHS[@]/%//INTERFACE.conf}.
+	  It is to be readable by wg(8)'s \`setconf' sub-command, with the exception
+	  of the following additions to the [Interface] section, which are handled
+	  by $PROGRAM:
 
 	  - Address: may be specified one or more times and contains one or more
 	    IP addresses (with an optional CIDR mask) to be set for the interface.