[package] base-files: Detect and decompressed gzipped images automatically when flash...

[openwrt.git] / package / base-files / files / lib / upgrade / common.sh

diff --git a/package/base-files/files/lib/upgrade/common.sh b/package/base-files/files/lib/upgrade/common.sh
index 7739275..018cc72 100644 (file)
--- a/package/base-files/files/lib/upgrade/common.sh
+++ b/package/base-files/files/lib/upgrade/common.sh
@@ -103,20 +103,27 @@ rootfs_type() {
        mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
 }
 
-get_image() {
+get_image() { # <source> [ <command> ]
        local from="$1"
-       local conc="cat"
+       local cmd="$2"
+       local conc
 
-       [ $GZIPED -eq 1 ] && conc="zcat"
+       if [ -z "$cmd" ]; then
+               case "$from" in
+                       http://*|ftp://*) cmd="wget -O- -q";;
+                       *) cmd="cat";;
+               esac
+               local magic="$(eval $cmd $from | dd bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
+               case "$magic" in
+                       1f8b) conc="| zcat";;
+               esac
+       fi
 
-       case "$from" in
-               http://*|ftp://*) wget -O- -q "$from" | "$conc";;
-               *) cat "$from" | "$conc";;
-       esac
+       eval "$cmd $from $conc"
 }
 
 get_magic_word() {
-       get_image "$1" | dd bs=2 count=1 2>/dev/null | hexdump -C | awk '$2 { print $2 $3 }'
+       get_image "$1" | dd bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"'
 }
 
 refresh_mtd_partitions() {
@@ -165,5 +172,9 @@ do_upgrade() {
        }
        v "Upgrade completed"
        [ -n "$DELAY" ] && sleep "$DELAY"
-       ask_bool 1 "Reboot" && reboot
+       ask_bool 1 "Reboot" && {
+               v "Rebooting system..."
+               echo b 2>/dev/null >/proc/sysrq-trigger
+               reboot
+       }
 }