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/wps.sh line 2:

echo [$0] $1 ... > /dev/console

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

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

Did you mean:

echo ["$0"] "$1" ... > /dev/console

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/wps.sh line 8:

	PIN=`wps -g`

            ^------^ SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

Did you mean:

	PIN=$(wps -g)

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/wps.sh line 9:

	devdata set -e pin=$PIN

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

Did you mean:

	devdata set -e pin="$PIN"

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 wps.sh