In /logs/firmware/unblob_extracted/firmware_extract/DIR-600_fw_revb5_214b01_ALL_de_20130122/dir600b_v2.14_d1mg.bin_extract/1179788-3612812.squashfs_v4_le_extract/etc/scripts/upnp/NOTIFYAB.sh line 2:
UPNPMSG=`xmldbc -g /runtime/upnpmsg`
        ^--------------------------^ SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

Did you mean:
UPNPMSG=$(xmldbc -g /runtime/upnpmsg)


In /logs/firmware/unblob_extracted/firmware_extract/DIR-600_fw_revb5_214b01_ALL_de_20130122/dir600b_v2.14_d1mg.bin_extract/1179788-3612812.squashfs_v4_le_extract/etc/scripts/upnp/NOTIFYAB.sh line 4:
echo "[$0]: [$1] [$2] [$3] [$4] [$5] ..." > $UPNPMSG
                                            ^------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean:
echo "[$0]: [$1] [$2] [$3] [$4] [$5] ..." > "$UPNPMSG"


In /logs/firmware/unblob_extracted/firmware_extract/DIR-600_fw_revb5_214b01_ALL_de_20130122/dir600b_v2.14_d1mg.bin_extract/1179788-3612812.squashfs_v4_le_extract/etc/scripts/upnp/NOTIFYAB.sh line 10:
if [ ! -f /var/run/notify.$1.$2.sh ]; then
                          ^-- SC2086 (info): Double quote to prevent globbing and word splitting.
                             ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean:
if [ ! -f /var/run/notify."$1"."$2".sh ]; then


In /logs/firmware/unblob_extracted/firmware_extract/DIR-600_fw_revb5_214b01_ALL_de_20130122/dir600b_v2.14_d1mg.bin_extract/1179788-3612812.squashfs_v4_le_extract/etc/scripts/upnp/NOTIFYAB.sh line 11:
	xmldbc -P /etc/scripts/upnp/NOTIFYAB.php -V NTS=$1 -V PHYINF=$3 -V IPADDR=$4 -V IPTYPE=$6 > /var/run/notify.$1.$2.sh
                                                        ^-- SC2086 (info): Double quote to prevent globbing and word splitting.
                                                                     ^-- SC2086 (info): Double quote to prevent globbing and word splitting.
                                                                                  ^-- SC2086 (info): Double quote to prevent globbing and word splitting.
                                                                                               ^-- SC2086 (info): Double quote to prevent globbing and word splitting.
                                                                                                                    ^-- SC2086 (info): Double quote to prevent globbing and word splitting.
                                                                                                                       ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean:
	xmldbc -P /etc/scripts/upnp/NOTIFYAB.php -V NTS="$1" -V PHYINF="$3" -V IPADDR="$4" -V IPTYPE="$6" > /var/run/notify."$1"."$2".sh


In /logs/firmware/unblob_extracted/firmware_extract/DIR-600_fw_revb5_214b01_ALL_de_20130122/dir600b_v2.14_d1mg.bin_extract/1179788-3612812.squashfs_v4_le_extract/etc/scripts/upnp/NOTIFYAB.sh line 13:
xmldbc -k upnp_alive_$2
                     ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean:
xmldbc -k upnp_alive_"$2"


In /logs/firmware/unblob_extracted/firmware_extract/DIR-600_fw_revb5_214b01_ALL_de_20130122/dir600b_v2.14_d1mg.bin_extract/1179788-3612812.squashfs_v4_le_extract/etc/scripts/upnp/NOTIFYAB.sh line 14:
sh /var/run/notify.$1.$2.sh
                   ^-- SC2086 (info): Double quote to prevent globbing and word splitting.
                      ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean:
sh /var/run/notify."$1"."$2".sh


In /logs/firmware/unblob_extracted/firmware_extract/DIR-600_fw_revb5_214b01_ALL_de_20130122/dir600b_v2.14_d1mg.bin_extract/1179788-3612812.squashfs_v4_le_extract/etc/scripts/upnp/NOTIFYAB.sh line 18:
	rm /var/run/notify.*.$2.sh
                             ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean:
	rm /var/run/notify.*."$2".sh

For more information:
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...
  https://www.shellcheck.net/wiki/SC2006 -- Use $(...) notation instead of le...

[*] Source file NOTIFYAB.sh