In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/lldpd-hostname-update line 3:

. /lib/rcscripts/sh/files.sh

  ^------------------------^ SC1091 (info): Not following: /lib/rcscripts/sh/files.sh was not specified as input (see shellcheck -x).

In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/lldpd-hostname-update line 13:

	echo $hostname_line > $hostname_conf.tmp ||

             ^------------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

	echo "$hostname_line" > $hostname_conf.tmp ||

In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/lldpd-hostname-update line 19:

	if [ ! -z "$(pidof lldpd)" ]; then

             ^-- SC2236 (style): Use -n instead of ! -z.

In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/lldpd-hostname-update line 20:

		lldpcli $hostname_line >/dev/null ||

                        ^------------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

		lldpcli "$hostname_line" >/dev/null ||

For more information:

  https://www.shellcheck.net/wiki/SC1091 -- Not following: /lib/rcscripts/sh/...

  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...

  https://www.shellcheck.net/wiki/SC2236 -- Use -n instead of ! -z.