In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 3:
. /lib/rcscripts/sh/error.sh
  ^------------------------^ SC1091 (info): Not following: /lib/rcscripts/sh/error.sh was not specified as input (see shellcheck -x).


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 6:
. $conf || error "Failed to source '$conf'!"
  ^---^ SC1090 (warning): ShellCheck can't follow non-constant source. Use a directive to specify location.


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 11:
read DEFAULT_QDISC </proc/sys/net/core/default_qdisc
^--^ SC2162 (info): read without -r will mangle backslashes.


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 19:
	mtu=$(ip -o link show $iface)
                              ^----^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
	mtu=$(ip -o link show "$iface")


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 29:
	local mtu roundup flow_limit
        ^--------------------------^ SC3043 (warning): In POSIX sh, 'local' is undefined.


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 40:
		WMEM_MAX=$(($WMEM_MAX * 2))
                            ^-------^ SC2004 (style): $/${} is unnecessary on arithmetic variables.


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 43:
	eval mtu=\$MTU_$1
                       ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
	eval mtu=\$MTU_"$1"


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 46:
	flow_limit=$(($WMEM_MAX / $mtu))
                      ^-------^ SC2004 (style): $/${} is unnecessary on arithmetic variables.
                                  ^--^ SC2004 (style): $/${} is unnecessary on arithmetic variables.


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 47:
	flow_limit=$(((($flow_limit / $roundup) + 1) * $roundup))
                        ^---------^ SC2004 (style): $/${} is unnecessary on arithmetic variables.
                                      ^------^ SC2004 (style): $/${} is unnecessary on arithmetic variables.
                                                       ^------^ SC2004 (style): $/${} is unnecessary on arithmetic variables.


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 53:
	local iface
        ^---------^ SC3043 (warning): In POSIX sh, 'local' is undefined.


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 58:
		get_default_qdisc_opts $iface
                                       ^----^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
		get_default_qdisc_opts "$iface"


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 59:
		tc qdisc replace dev $iface root $DEFAULT_QDISC $DEFAULT_QDISC_OPTS || return 1
                                     ^----^ 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: 
		tc qdisc replace dev "$iface" root "$DEFAULT_QDISC" "$DEFAULT_QDISC_OPTS" || return 1


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 64:
	local tc_burst=
        ^------------^ SC3043 (warning): In POSIX sh, 'local' is undefined.


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 68:
	eval tc_burst=\$MTU_$1
                            ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
	eval tc_burst=\$MTU_"$1"


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 69:
	tc_burst=$(($tc_burst + 100))
                    ^-------^ SC2004 (style): $/${} is unnecessary on arithmetic variables.


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 71:
	if [ $TC_BURST -gt $tc_burst ]; then
             ^-------^ SC2086 (info): Double quote to prevent globbing and word splitting.
             ^-------^ SC2153 (info): Possible misspelling: TC_BURST may not be assigned. Did you mean tc_burst?

Did you mean: 
	if [ "$TC_BURST" -gt $tc_burst ]; then


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 75:
	[ $tc_burst -gt 0 ] || error "No valid burst value"
          ^-------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
	[ "$tc_burst" -gt 0 ] || error "No valid burst value"


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 77:
	tc qdisc del dev $1 root 2>/dev/null || :
                         ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
	tc qdisc del dev "$1" root 2>/dev/null || :


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 79:
	tc qdisc add dev $1 root handle 1: htb default 10 || return 1
                         ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
	tc qdisc add dev "$1" root handle 1: htb default 10 || return 1


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 81:
	tc class add dev $1 parent 1: classid 1:1 htb rate $TC_RATE || return 1
                         ^-- SC2086 (info): Double quote to prevent globbing and word splitting.
                                                           ^------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
	tc class add dev "$1" parent 1: classid 1:1 htb rate "$TC_RATE" || return 1


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 83:
	tc class add dev $1 parent 1:1 classid 1:10 htb rate 1kbit ceil $TC_RATE\
                         ^-- SC2086 (info): Double quote to prevent globbing and word splitting.
                                                                        ^------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
	tc class add dev "$1" parent 1:1 classid 1:10 htb rate 1kbit ceil "$TC_RATE"\


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 85:
	tc qdisc add dev $1 parent 1:10 handle 100: tbf rate $TC_RATE burst $tc_burst\
                         ^-- 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: 
	tc qdisc add dev "$1" parent 1:10 handle 100: tbf rate "$TC_RATE" burst "$tc_burst"\


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 89:
			get_default_qdisc_opts $1
                                               ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
			get_default_qdisc_opts "$1"


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 90:
			tc qdisc add dev $1 parent 100:1 $DEFAULT_QDISC $DEFAULT_QDISC_OPTS || return 1
                                         ^-- 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: 
			tc qdisc add dev "$1" parent 100:1 "$DEFAULT_QDISC" "$DEFAULT_QDISC_OPTS" || return 1


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 94:
	tc class add dev $1 parent 1:1 classid 1:20 htb rate 1kbit ceil $TC_RATE \
                         ^-- SC2086 (info): Double quote to prevent globbing and word splitting.
                                                                        ^------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
	tc class add dev "$1" parent 1:1 classid 1:20 htb rate 1kbit ceil "$TC_RATE" \


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 96:
	tc qdisc add dev $1 parent 1:20 tbf rate $TC_RATE burst $tc_burst latency 1s \
                         ^-- 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: 
	tc qdisc add dev "$1" parent 1:20 tbf rate "$TC_RATE" burst "$tc_burst" latency 1s \


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 98:
	tc filter add dev $1 parent 1: protocol ip prio 0 u32 match ip protocol 17 \
                          ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
	tc filter add dev "$1" parent 1: protocol ip prio 0 u32 match ip protocol 17 \


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 105:
	local rate rate_unit iface changed
        ^-- SC3043 (warning): In POSIX sh, 'local' is undefined.


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 108:
	rate_unit=${TC_RATE#$rate}
                            ^---^ SC2295 (info): Expansions inside ${..} need to be quoted separately, otherwise they match as patterns.

Did you mean: 
	rate_unit=${TC_RATE#"$rate"}


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 113:
			if [ $rate -ge $LOWER_LIMIT_KBIT ] &&
                             ^---^ SC2086 (info): Double quote to prevent globbing and word splitting.
                                       ^---------------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
			if [ "$rate" -ge "$LOWER_LIMIT_KBIT" ] &&


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 114:
			   [ $rate -le $UPPER_LIMIT_KBIT ]; then
                             ^---^ SC2086 (info): Double quote to prevent globbing and word splitting.
                                       ^---------------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
			   [ "$rate" -le "$UPPER_LIMIT_KBIT" ]; then


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 117:
					tc_add_cmd $iface || {
                                                   ^----^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
					tc_add_cmd "$iface" || {


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 125:
			if [ $rate -ge $LOWER_LIMIT_MBIT ] &&
                             ^---^ SC2086 (info): Double quote to prevent globbing and word splitting.
                                       ^---------------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
			if [ "$rate" -ge "$LOWER_LIMIT_MBIT" ] &&


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 126:
			   [ $rate -le $UPPER_LIMIT_MBIT ]; then
                             ^---^ SC2086 (info): Double quote to prevent globbing and word splitting.
                                       ^---------------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
			   [ "$rate" -le "$UPPER_LIMIT_MBIT" ]; then


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 129:
					tc_add_cmd $iface || {
                                                   ^----^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
					tc_add_cmd "$iface" || {


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 142:
	local iface
        ^---------^ SC3043 (warning): In POSIX sh, 'local' is undefined.


In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/bandwidth-setup line 145:
		tc qdisc del dev $iface root 2>/dev/null || :
                                 ^----^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
		tc qdisc del dev "$iface" root 2>/dev/null || :

For more information:
  https://www.shellcheck.net/wiki/SC1090 -- ShellCheck can't follow non-const...
  https://www.shellcheck.net/wiki/SC3043 -- In POSIX sh, 'local' is undefined.
  https://www.shellcheck.net/wiki/SC1091 -- Not following: /lib/rcscripts/sh/...