brcm47xx: extract TRX from image on the fly

Extracting TRX to separated file in /tmp/ requires extra RAM which may
not be available on some chepaer devices. Instead of that lets pass a
proper extracting command to the default_do_upgrade.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 45901

diff --git a/target/linux/brcm47xx/base-files/lib/upgrade/platform.sh b/target/linux/brcm47xx/base-files/lib/upgrade/platform.sh
index a346933f9acc94e01391e6deb534ebd994d4e60c..14fd5c814daf6c854077efe52031af3238aba773 100644 (file)
--- a/target/linux/brcm47xx/base-files/lib/upgrade/platform.sh
+++ b/target/linux/brcm47xx/base-files/lib/upgrade/platform.sh
@@ -133,25 +133,26 @@ platform_check_image() {
        return $error
 }
 
-platform_extract_trx_from_chk() {
+platform_trx_from_chk_cmd() {
        local header_len=$((0x$(get_magic_long_at "$1" 4)))
 
-       dd if="$1" of="$2" bs=$header_len skip=1
+       echo -n dd bs=$header_len skip=1
 }
 
-platform_extract_trx_from_cybertan() {
-       dd if="$1" of="$2" bs=32 skip=1
+platform_trx_from_cybertan_cmd() {
+       echo -n dd bs=32 skip=1
 }
 
 platform_do_upgrade() {
        local file_type=$(brcm47xx_identify "$1")
        local trx="$1"
+       local cmd=""
 
        case "$file_type" in
-               "chk")          trx="/tmp/$(basename $1).trx"; platform_extract_trx_from_chk "$1" "$trx";;
-               "cybertan")     trx="/tmp/$(basename $1).trx"; platform_extract_trx_from_cybertan "$1" "$trx";;
+               "chk")          cmd=$(platform_trx_from_chk_cmd "$trx");;
+               "cybertan")     cmd=$(platform_trx_from_cybertan_cmd "$trx");;
        esac
 
        shift
-       default_do_upgrade "$trx" "$@"
+       default_do_upgrade "$trx" "$cmd"
 }