network: remove awk call and replace it with a shell function

changes commit 4fa5c235a7

dracut-functions.sh

@@ -37,6 +37,16 @@ str_starts() { [ "${1#"$2"*}" != "$1" ]; }
 # returns OK if $1 contains literal string $2 at the end, and isn't empty
 str_ends() { [ "${1%*"$2"}" != "$1" ]; }
 
+uniq_lines() {
+    local -A lines
+    while read -r line; do
+        if ! [[ ${lines[$line]} ]]; then
+            echo "$line"
+            lines[$line]=1
+        fi
+    done
+}
+
 # find a binary.  If we were not passed the full path directly,
 # search in the usual places to find the binary.
 find_binary() {

modules.d/40network/module-setup.sh

@@ -23,7 +23,7 @@ installkernel() {
 # called by dracut
 install() {
     local _arch _i _dir
-    inst_multiple ip arping dhclient sed awk
+    inst_multiple ip arping dhclient sed
     inst_multiple -o ping ping6
     inst_multiple -o brctl
     inst_multiple -o teamd teamdctl teamnl

modules.d/40network/net-lib.sh

@@ -120,7 +120,7 @@ setup_net() {
     [ -e /tmp/dhclient.$netif.dhcpopts ] && . /tmp/dhclient.$netif.dhcpopts
     # set up resolv.conf
     [ -e /tmp/net.$netif.resolv.conf ] && \
-        awk '!array[$0]++' /tmp/net.$netif.resolv.conf > /etc/resolv.conf
+        uniq_lines < /tmp/net.$netif.resolv.conf > /etc/resolv.conf
     [ -e /tmp/net.$netif.gw ]            && . /tmp/net.$netif.gw
 
     # add static route