make shell math operations style more succulent

Convert the style:
	var=$((${var} + 1))
to:
	: $(( var += 1 ))

The latter is easier to read imo.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 11 insertions, 11 deletions

diff --git a/init.d/net.lo.in b/init.d/net.lo.in
index 66e1945..d647f31 100644
--- a/init.d/net.lo.in
+++ b/init.d/net.lo.in
@@ -115,7 +115,7 @@ _wait_for_carrier()
 			eend 0
 			return 0
 		fi
-		timeout=$((${timeout} - 1))
+		: $(( timeout -= 1 ))
 		[ "${efunc}" = "einfon" ] && printf "."
 	done
 
@@ -144,9 +144,9 @@ _netmask2cidr()
 	local i= len=
 	local IFS=.
 	for i in $1; do
-		while [ ${i} != "0" ]; do
-			len=$((${len} + ${i} % 2))
-			i=$((${i} >> 1))
+		while [ i -ne 0 ]; do
+			: $(( len += i % 2 ))
+			: $(( i >>= 1 ))
 		done
 	done
 
@@ -277,7 +277,7 @@ _gen_module_list()
 		echo "module_${i}_program_start='${PROGRAM_START}'" >> "${MODULESLIST}"
 		echo "module_${i}_program_stop='${PROGRAM_STOP}'" >> "${MODULESLIST}"
 		echo "module_${i}_provide='${PROVIDE}'" >> "${MODULESLIST}"
-		i=$((${i} + 1))
+		: $(( i += 1 ))
 	done
 	echo "module_${i}=" >> "${MODULESLIST}"
 	)
@@ -304,7 +304,7 @@ _load_modules()
 
 	local i=-1 x= mod= f= provides=
 	while true; do
-		i=$((${i} + 1))
+		: $(( i += 1 ))
 		eval mod=\$module_${i}
 		[ -z "${mod}" ] && break
 		[ -e "${MODULESDIR}/${mod}.sh" ] || continue
@@ -438,7 +438,7 @@ _load_config()
 	# so modules can influence it
 	for cmd; do
 		eval config_${config_index}="'${cmd}'"
-		config_index=$((${config_index} + 1))
+		: $(( config_index += 1 ))
 	done
 	# Terminate the list
 	eval config_${config_index}=
@@ -446,7 +446,7 @@ _load_config()
 	config_index=0
 	for cmd in ${fallback}; do
 		eval fallback_${config_index}="'${cmd}'"
-		config_index=$((${config_index} + 1))
+		: $(( config_index += 1 ))
 	done
 	# Terminate the list
 	eval fallback_${config_index}=
@@ -541,7 +541,7 @@ start()
 	if [ -n "${our_metric}" ]; then
 		metric=${our_metric}
 	elif [ "${IFACE}" != "lo" -a "${IFACE}" != "lo0" ]; then
-		metric=$((${metric} + $(_ifindex)))
+		: $(( metric += $(_ifindex) ))
 	fi
 
 	while true; do
@@ -581,11 +581,11 @@ start()
 				eindent
 				eval config_${config_index}=\$config
 				unset fallback_${config_index}
-				config_index=$((${config_index} - 1))
+				: $(( config_index -= 1 ))
 			fi
 		fi
 		eoutdent
-		config_index=$((${config_index} + 1))
+		: $(( config_index += 1 ))
 	done
 
 	if ! ${oneworked}; then