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-rw-r--r--package/base-files/files/lib/upgrade/common.sh11
1 files changed, 11 insertions, 0 deletions
diff --git a/package/base-files/files/lib/upgrade/common.sh b/package/base-files/files/lib/upgrade/common.sh
index 5eb7b23a83..a5c27dc2fb 100644
--- a/package/base-files/files/lib/upgrade/common.sh
+++ b/package/base-files/files/lib/upgrade/common.sh
@@ -106,6 +106,17 @@ get_image() { # <source> [ <command> ]
$cmd <"$from"
}
+get_image_dd() {
+ local from="$1"; shift
+
+ (
+ exec 3>&2
+ ( exec 3>&2; get_image "$from" 2>&1 1>&3 | grep -v -F ' Broken pipe' ) 2>&1 1>&3 \
+ | ( exec 3>&2; dd "$@" 2>&1 1>&3 | grep -v -E ' records (in|out)') 2>&1 1>&3
+ exec 3>&-
+ )
+}
+
get_magic_word() {
(get_image "$@" | dd bs=2 count=1 | hexdump -v -n 2 -e '1/1 "%02x"') 2>/dev/null
}