In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/lib/systemd/system-generators/vftp-generator line 3:

. /lib/rcscripts/sh/systemd-generator.sh

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

In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/lib/systemd/system-generators/vftp-generator line 4:

. /etc/conf.d/ftpd

  ^--------------^ SC1091 (info): Not following: /etc/conf.d/ftpd was not specified as input (see shellcheck -x).

In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/lib/systemd/system-generators/vftp-generator line 6:

if [ $FTP_ENABLED = yes ]; then

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

Did you mean: 

if [ "$FTP_ENABLED" = yes ]; then

For more information:

  https://www.shellcheck.net/wiki/SC1091 -- Not following: /etc/conf.d/ftpd w...

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