base-files: stage2: add 'tail' to sysupgrade environment

This is used to access footer data in firmare files, and is simpler and
less error-prone than using 'dd' with calculated offsets.

Signed-off-by: Tony Ambardar <itugrok@yahoo.com>

diff --git a/package/base-files/files/lib/upgrade/stage2 b/package/base-files/files/lib/upgrade/stage2
index 6314d4064671ba3e88eaef4576b7c188851e740a..f4db88d31ea18f0016ae08828f9b7d6a204db43d 100755 (executable)
--- a/package/base-files/files/lib/upgrade/stage2
+++ b/package/base-files/files/lib/upgrade/stage2
@@ -41,7 +41,7 @@ switch_to_ramfs() {
                pivot_root mount_root reboot sync kill sleep            \
                md5sum hexdump cat zcat dd tar gzip                     \
                ls basename find cp mv rm mkdir rmdir mknod touch chmod \
-               '[' printf wc grep awk sed cut sort                     \
+               '[' printf wc grep awk sed cut sort tail                \
                mtd partx losetup mkfs.ext4 nandwrite flash_erase       \
                ubiupdatevol ubiattach ubiblock ubiformat               \
                ubidetach ubirsvol ubirmvol ubimkvol                    \