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-rw-r--r--package/base-files/files/lib/upgrade/common.sh12
1 files changed, 6 insertions, 6 deletions
diff --git a/package/base-files/files/lib/upgrade/common.sh b/package/base-files/files/lib/upgrade/common.sh
index 5f5c9dc8a3..38056fd346 100644
--- a/package/base-files/files/lib/upgrade/common.sh
+++ b/package/base-files/files/lib/upgrade/common.sh
@@ -78,18 +78,18 @@ rootfs_type() {
get_image() { # <source> [ <command> ]
local from="$1"
- local cat="$2"
+ local cmd="$2"
- if [ -z "$cat" ]; then
+ if [ -z "$cmd" ]; then
local magic="$(dd if="$from" bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
case "$magic" in
- 1f8b) cat="zcat";;
- 425a) cat="bzcat";;
- *) cat="cat";;
+ 1f8b) cmd="zcat";;
+ 425a) cmd="bzcat";;
+ *) cmd="cat";;
esac
fi
- $cat "$from" 2>/dev/null
+ cat "$from" 2>/dev/null | $cmd
}
get_magic_word() {