In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/bin/checkprogress.sh line 7:
	echo -n 0
             ^-- SC3037 (warning): In POSIX sh, echo flags are undefined.


In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/bin/checkprogress.sh line 13:
. /lib/rcscripts/sh/systemd.sh
  ^--------------------------^ SC1091 (info): Not following: /lib/rcscripts/sh/systemd.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/bin/checkprogress.sh line 15:
$(init_done)
^----------^ SC2091 (warning): Remove surrounding $() to avoid executing output (or use eval if intentional).


In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/bin/checkprogress.sh line 16:
echo -n $?
     ^-- SC3037 (warning): In POSIX sh, echo flags are undefined.

For more information:
  https://www.shellcheck.net/wiki/SC2091 -- Remove surrounding $() to avoid e...
  https://www.shellcheck.net/wiki/SC3037 -- In POSIX sh, echo flags are undef...
  https://www.shellcheck.net/wiki/SC1091 -- Not following: /lib/rcscripts/sh/...