net: net.lo, lots of scripts

The program function in depend blocks is now able to search paths by
itself. If passed multiple arguments or multiple calls, at least one of
the arguments passed must be a program or a shell builtin (eg ip built
into busybox). If a qualified path is specified, only that path will be
checked, otherwise it will be checked as a builtin, then $PATH will be
checked for the named binary (via type).

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>

10 files changed, 36 insertions, 42 deletions

diff --git a/init.d/net.lo.in b/init.d/net.lo.in
index de393bd..2913561 100644
--- a/init.d/net.lo.in
+++ b/init.d/net.lo.in
@@ -172,7 +172,9 @@ _configure_variables()
 _which()
 {
 	local i OIFS
+	# Empty
 	[ -z "$1" ] && return
+	# check paths
 	OIFS="$IFS"
 	IFS=:
 	for i in $PATH ; do
@@ -181,6 +183,22 @@ _which()
 	IFS=$OIFS
 }
 
+# Like _which, but also consider shell builtins, and multiple alternatives
+_program_available()
+{
+	[ -z "$1" ] && return 0
+	local x=
+	for x; do
+		case "${x}" in
+			/*) [ -x "${x}" ] && break;;
+			*) type "${x}" >/dev/null 2>&1 && break;;
+		esac
+		unset x
+	done
+	[ -n "${x}" ] && echo $x && return 0
+	return 1
+}
+
 _show_address()
 {
 	einfo "received address $(_get_inet_address "${IFACE}")"
@@ -323,11 +341,10 @@ _load_modules()
 
 		eval set -- \$module_${i}_program
 		if [ -n "$1" ]; then
-			x=
-			for x; do
-				[ -x "${x}" ] && break
-			done
-			[ -x "${x}" ] || continue
+			if ! _program_available "$@" >/dev/null; then
+				vewarn "Skipping module $mod due to missing program: $@"
+				continue
+			fi
 		fi
 		if ${starting}; then
 			eval set -- \$module_${i}_program_start
@@ -335,15 +352,10 @@ _load_modules()
 			eval set -- \$module_${i}_program_stop
 		fi
 		if [ -n "$1" ]; then
-			x=
-			for x; do
-				case "${x}" in
-					/*) [ -x "${x}" ] && break;;
-					*) type "${x}" >/dev/null 2>&1 && break;;
-				esac
-				unset x
-			done
-			[ -n "${x}" ] || continue
+			if ! _program_available "$@" >/dev/null; then
+				vewarn "Skipping module $mod due to missing program: $@"
+				continue
+			fi
 		fi
 
 		eval provides=\$module_${i}_provide
diff --git a/net/br2684ctl.sh b/net/br2684ctl.sh
index d605579..b3f6119 100644
--- a/net/br2684ctl.sh
+++ b/net/br2684ctl.sh
@@ -1,19 +1,10 @@
 # Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
 # Released under the 2-clause BSD license.
 
-_br2684ctl()
-{
-	if [ -x /usr/sbin/br2684ctl ]; then
-		echo /usr/sbin/br2684ctl
-	else
-		echo /sbin/br2684ctl
-	fi
-}
-
 br2684ctl_depend()
 {
 	before ppp
-	program start $(_br2684ctl)
+	program start br2684ctl
 }
 
 _config_vars="$_config_vars bridge bridge_add brctl"
@@ -42,7 +33,7 @@ br2684ctl_pre_start()
 	esac
 
 	einfo "Starting RFC 2684 Bridge control on ${IFACE}"
-	start-stop-daemon --start --exec $(_br2684ctl) --background \
+	start-stop-daemon --start --exec $(_which br2684ctl) --background \
 		--make-pidfile --pidfile "/var/run/br2684ctl-${IFACE}.pid" \
 		-- -c "${IFACE#nas*}" ${opts}
 	eend $?
diff --git a/net/bridge.sh b/net/bridge.sh
index 7b80ec0..4f3618a 100644
--- a/net/bridge.sh
+++ b/net/bridge.sh
@@ -4,7 +4,7 @@
 bridge_depend()
 {
 	before interface macnet
-	program /sbin/brctl
+	program brctl
 }
 
 _config_vars="$_config_vars bridge bridge_add brctl"
diff --git a/net/ethtool.sh b/net/ethtool.sh
index ba5719d..4e10409 100644
--- a/net/ethtool.sh
+++ b/net/ethtool.sh
@@ -3,10 +3,7 @@
 
 ethtool_depend()
 {
-	local x
-	x=$(_which ethtool)
-	[ -z "$x" ] && return 1
-	program $x
+	program ethtool
 	before interface
 }
 
diff --git a/net/ip6to4.sh b/net/ip6to4.sh
index 959a2a0..51b3858 100644
--- a/net/ip6to4.sh
+++ b/net/ip6to4.sh
@@ -6,6 +6,7 @@ _config_vars="$_config_vars link suffix relay"
 ip6to4_depend()
 {
 	after interface
+	program ip
 }
 
 ip6to4_pre_start()
diff --git a/net/iproute2.sh b/net/iproute2.sh
index 16d9a60..9b89352 100644
--- a/net/iproute2.sh
+++ b/net/iproute2.sh
@@ -3,10 +3,7 @@
 
 iproute2_depend()
 {
-	local x
-	x=$(_which ip)
-	[ -z "$x" ] && return 1
-	program $x
+	program ip
 	provide interface
 	after ifconfig
 }
diff --git a/net/macchanger.sh b/net/macchanger.sh
index ad41309..4e535ec 100644
--- a/net/macchanger.sh
+++ b/net/macchanger.sh
@@ -4,6 +4,7 @@
 macchanger_depend()
 {
 	before macnet
+	# no program 'macchanger', as we have partial functionality without it
 }
 
 _config_vars="$_config_vars mac"
diff --git a/net/macvlan.sh b/net/macvlan.sh
index ccb28ea..86a659c 100644
--- a/net/macvlan.sh
+++ b/net/macvlan.sh
@@ -5,10 +5,7 @@
 
 macvlan_depend()
 {
-	local x
-	x=$(_which ip)
-	[ -z "${X}" ] && return 1
-	program $x
+	program ip
 	after interface
 	before dhcp macchanger
 }
diff --git a/net/tuntap.sh b/net/tuntap.sh
index 679b097..d0f24c5 100644
--- a/net/tuntap.sh
+++ b/net/tuntap.sh
@@ -4,6 +4,7 @@
 tuntap_depend()
 {
 	before bridge interface macchanger
+	program ip openvpn tunctl
 }
 
 _config_vars="$_config_vars iproute2 openvpn tunctl"
diff --git a/net/vlan.sh b/net/vlan.sh
index ec30dd6..ff63dfd 100644
--- a/net/vlan.sh
+++ b/net/vlan.sh
@@ -3,10 +3,7 @@
 
 vlan_depend()
 {
-	local x
-	x=$(_which ip)
-	[ -z "$x" ] && return 1
-	program $x
+	program ip
 	after interface
 	before dhcp
 }