In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/libexec/pre-parhand-set-defaults 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/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/libexec/pre-parhand-set-defaults line 5:
. $conffile || error "Failed to source '$conffile'!"
  ^-------^ SC1090 (warning): ShellCheck can't follow non-constant source. Use a directive to specify location.


In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/libexec/pre-parhand-set-defaults line 11:
	parameters=`bootblocktool -l |grep '^root\.'`
                   ^-- SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

Did you mean: 
	parameters=$(bootblocktool -l |grep '^root\.')


In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/libexec/pre-parhand-set-defaults line 29:
		value=`echo "${param#*=}" | sed 's!/!\\/!g'`
                      ^-- SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

Did you mean: 
		value=$(echo "${param#*=}" | sed 's!/!\\/!g')


In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/libexec/pre-parhand-set-defaults line 36:
			printf "$configuration" > "$tempfile" || warning "Failed to update value in $brand_conf"
                               ^--------------^ SC2059 (info): Don't use variables in the printf format string. Use printf '..%s..' "$foo".

For more information:
  https://www.shellcheck.net/wiki/SC1090 -- ShellCheck can't follow non-const...
  https://www.shellcheck.net/wiki/SC1091 -- Not following: /lib/rcscripts/sh/...
  https://www.shellcheck.net/wiki/SC2059 -- Don't use variables in the printf...