[package] sysupgrade: sync *before* mtd write, only fallback to sysrq-trigger if...

[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..2c39249 100644 (file)
--- a/package/base-files/files/lib/upgrade/common.sh
+++ b/package/base-files/files/lib/upgrade/common.sh
@@ -45,7 +45,7 @@ pivot() { # <new_root> <old_root>
 }
 
 run_ramfs() { # <command> [...]
-       install_bin /bin/busybox /bin/ash /bin/sh /bin/mount /bin/umount /sbin/pivot_root /usr/bin/wget /sbin/reboot /bin/sync /bin/dd /bin/grep /bin/cp /bin/mv /bin/tar /usr/bin/md5sum "/usr/bin/[" /bin/vi /bin/ls /bin/cat /usr/bin/awk /usr/bin/hexdump /bin/sleep /bin/zcat
+       install_bin /bin/busybox /bin/ash /bin/sh /bin/mount /bin/umount /sbin/pivot_root /usr/bin/wget /sbin/reboot /bin/sync /bin/dd /bin/grep /bin/cp /bin/mv /bin/tar /usr/bin/md5sum "/usr/bin/[" /bin/vi /bin/ls /bin/cat /usr/bin/awk /usr/bin/hexdump /bin/sleep /bin/zcat /usr/bin/bzcat
        install_bin /sbin/mtd
        for file in $RAMFS_COPY_BIN; do
                install_bin $file
@@ -103,20 +103,28 @@ 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";;
+                       425a) conc="| bzcat";;
+               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() {
@@ -134,12 +142,12 @@ jffs2_copy_config() {
 }
 
 default_do_upgrade() {
+       sync
        if [ "$SAVE_CONFIG" -eq 1 -a -z "$USE_REFRESH" ]; then
                get_image "$1" | mtd -j "$CONF_TAR" write - "${PART_NAME:-image}"
        else
                get_image "$1" | mtd write - "${PART_NAME:-image}"
        fi
-       sync
 }
 
 do_upgrade() {
@@ -149,7 +157,7 @@ do_upgrade() {
        else
                default_do_upgrade "$ARGV"
        fi
-       
+
        [ "$SAVE_CONFIG" -eq 1 -a -n "$USE_REFRESH" ] && {
                v "Refreshing partitions"
                if type 'platform_refresh_partitions' >/dev/null 2>/dev/null; then
@@ -165,5 +173,10 @@ do_upgrade() {
        }
        v "Upgrade completed"
        [ -n "$DELAY" ] && sleep "$DELAY"
-       ask_bool 1 "Reboot" && reboot
+       ask_bool 1 "Reboot" && {
+               v "Rebooting system..."
+               reboot
+               sleep 5
+               echo b 2>/dev/null >/proc/sysrq-trigger
+       }
 }