Avoid unnecessary calls to expr(1) by using standard shell arithmetic

expansion instead.

etc/network.subr

@@ -218,7 +218,7 @@ network_pass1() {
 			if [ -n "${ifconfig_args}" ]; then
 				ifconfig ${ifn} ${ifconfig_args} alias
 				eval showstat_$ifn=1
-				alias=`expr ${alias} + 1`
+				alias=$((${alias} + 1))
 			else
 				break;
 			fi

etc/rc.atm

@@ -148,7 +148,7 @@ atm_pass2() {
 		netindx=0
 		while [ ${netindx} -lt ${netcnt} ]; do
 			net="${netname}${netindx}"
-			netindx=`expr ${netindx} + 1`
+			netindx=$((${netindx} + 1))
 			echo -n " ${net}"
 
 			# Configure atmarp server

etc/rc.d/atm1

@@ -148,7 +148,7 @@ atm_pass2() {
 		netindx=0
 		while [ ${netindx} -lt ${netcnt} ]; do
 			net="${netname}${netindx}"
-			netindx=`expr ${netindx} + 1`
+			netindx=$((${netindx} + 1))
 			echo -n " ${net}"
 
 			# Configure atmarp server

etc/rc.d/atm2

@@ -148,7 +148,7 @@ atm_pass2() {
 		netindx=0
 		while [ ${netindx} -lt ${netcnt} ]; do
 			net="${netname}${netindx}"
-			netindx=`expr ${netindx} + 1`
+			netindx=$((${netindx} + 1))
 			echo -n " ${net}"
 
 			# Configure atmarp server

etc/rc.d/atm2.sh

@@ -148,7 +148,7 @@ atm_pass2() {
 		netindx=0
 		while [ ${netindx} -lt ${netcnt} ]; do
 			net="${netname}${netindx}"
-			netindx=`expr ${netindx} + 1`
+			netindx=$((${netindx} + 1))
 			echo -n " ${net}"
 
 			# Configure atmarp server

etc/rc.d/atm3

@@ -148,7 +148,7 @@ atm_pass2() {
 		netindx=0
 		while [ ${netindx} -lt ${netcnt} ]; do
 			net="${netname}${netindx}"
-			netindx=`expr ${netindx} + 1`
+			netindx=$((${netindx} + 1))
 			echo -n " ${net}"
 
 			# Configure atmarp server

etc/rc.d/atm3.sh

@@ -148,7 +148,7 @@ atm_pass2() {
 		netindx=0
 		while [ ${netindx} -lt ${netcnt} ]; do
 			net="${netname}${netindx}"
-			netindx=`expr ${netindx} + 1`
+			netindx=$((${netindx} + 1))
 			echo -n " ${net}"
 
 			# Configure atmarp server

etc/rc.d/netoptions

@@ -218,7 +218,7 @@ network_pass1() {
 			if [ -n "${ifconfig_args}" ]; then
 				ifconfig ${ifn} ${ifconfig_args} alias
 				eval showstat_$ifn=1
-				alias=`expr ${alias} + 1`
+				alias=$((${alias} + 1))
 			else
 				break;
 			fi

etc/rc.d/network1

@@ -218,7 +218,7 @@ network_pass1() {
 			if [ -n "${ifconfig_args}" ]; then
 				ifconfig ${ifn} ${ifconfig_args} alias
 				eval showstat_$ifn=1
-				alias=`expr ${alias} + 1`
+				alias=$((${alias} + 1))
 			else
 				break;
 			fi

etc/rc.d/network2

@@ -218,7 +218,7 @@ network_pass1() {
 			if [ -n "${ifconfig_args}" ]; then
 				ifconfig ${ifn} ${ifconfig_args} alias
 				eval showstat_$ifn=1
-				alias=`expr ${alias} + 1`
+				alias=$((${alias} + 1))
 			else
 				break;
 			fi

etc/rc.d/network3

@@ -218,7 +218,7 @@ network_pass1() {
 			if [ -n "${ifconfig_args}" ]; then
 				ifconfig ${ifn} ${ifconfig_args} alias
 				eval showstat_$ifn=1
-				alias=`expr ${alias} + 1`
+				alias=$((${alias} + 1))
 			else
 				break;
 			fi

etc/rc.d/routing

@@ -218,7 +218,7 @@ network_pass1() {
 			if [ -n "${ifconfig_args}" ]; then
 				ifconfig ${ifn} ${ifconfig_args} alias
 				eval showstat_$ifn=1
-				alias=`expr ${alias} + 1`
+				alias=$((${alias} + 1))
 			else
 				break;
 			fi

etc/rc.network

@@ -218,7 +218,7 @@ network_pass1() {
 			if [ -n "${ifconfig_args}" ]; then
 				ifconfig ${ifn} ${ifconfig_args} alias
 				eval showstat_$ifn=1
-				alias=`expr ${alias} + 1`
+				alias=$((${alias} + 1))
 			else
 				break;
 			fi