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authorFelix Fietkau <nbd@openwrt.org>2007-08-21 18:23:57 +0000
committerFelix Fietkau <nbd@openwrt.org>2007-08-21 18:23:57 +0000
commit1e38527a525ca2e4dbe3a53dad63669773d3d15c (patch)
tree6914285134a096e80ea7cc6fe3578ee2a23ab50e /package/base-files/files/lib
parentba05b57573eaf3272997892eb521451b670c4d5e (diff)
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add sysupgrade script for config preserving system upgrades. only implemented for x86-2.6 at the moment, but can be ported to other platforms easily
SVN-Revision: 8456
Diffstat (limited to 'package/base-files/files/lib')
-rw-r--r--package/base-files/files/lib/upgrade/common.sh151
1 files changed, 151 insertions, 0 deletions
diff --git a/package/base-files/files/lib/upgrade/common.sh b/package/base-files/files/lib/upgrade/common.sh
new file mode 100644
index 0000000000..6cc09e1a46
--- /dev/null
+++ b/package/base-files/files/lib/upgrade/common.sh
@@ -0,0 +1,151 @@
+#!/bin/sh
+
+RAM_ROOT=/tmp/root
+
+ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
+libs() { ldd $* | awk '{print $3}'; }
+
+install_file() { # <file> [ <file> ... ]
+ for file in "$@"; do
+ dest="$RAM_ROOT/$file"
+ [ -f $file -a ! -f $dest ] && {
+ dir="$(dirname $dest)"
+ mkdir -p "$dir"
+ cp $file $dest
+ }
+ done
+}
+
+install_bin() { # <file> [ <symlink> ... ]
+ src=$1
+ files=$1
+ [ -x "$src" ] && files="$src $(libs $src)"
+ install_file $files
+ shift
+ for link in "$@"; do {
+ dest="$RAM_ROOT/$link"
+ dir="$(dirname $dest)"
+ mkdir -p "$dir"
+ [ -f "$dest" ] || ln -s $src $dest
+ }; done
+}
+
+pivot() { # <new_root> <old_root>
+ mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
+ mkdir -p $1$2 $1/proc $1/dev $1/tmp $1/jffs && \
+ mount -o move /proc $1/proc && \
+ pivot_root $1 $1$2 || {
+ umount $1 $1
+ return 1
+ }
+ mount -o move $2/dev /dev
+ mount -o move $2/tmp /tmp
+ mount -o move $2/jffs /jffs 2>&-
+ return 0
+}
+
+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
+ install_bin /sbin/mtd
+ for file in $RAMFS_COPY_BIN; do
+ install_bin $file
+ done
+ install_file /etc/resolv.conf /etc/functions.sh /lib/upgrade/*.sh $RAMFS_COPY_DATA
+
+ pivot $RAM_ROOT /mnt || {
+ echo "Failed to switch over to ramfs. Please reboot."
+ exit 1
+ }
+
+ mount -o remount,ro /mnt
+ umount -l /mnt
+
+ grep /jffs /proc/mounts > /dev/null && {
+ mount -o remount,ro /jffs
+ umount -l /jffs
+ }
+
+ # spawn a new shell from ramdisk to reduce the probability of cache issues
+ exec /bin/busybox ash -c "$*"
+}
+
+run_hooks() {
+ local arg="$1"; shift
+ for func in "$@"; do
+ eval "$func $arg"
+ done
+}
+
+ask_bool() {
+ local default="$1"; shift;
+ local answer="$default"
+
+ [ "$INTERACTIVE" -eq 1 ] && {
+ case "$default" in
+ 0) echo -n "$* (y/N): ";;
+ *) echo -n "$* (Y/n): ";;
+ esac
+ read answer
+ case "$answer" in
+ y*) answer=1;;
+ n*) answer=0;;
+ *) answer="$default";;
+ esac
+ }
+ [ "$answer" -gt 0 ]
+}
+
+v() {
+ [ "$VERBOSE" -ge 1 ] && echo "$@"
+}
+
+rootfs_type() {
+ mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
+}
+
+get_image() {
+ local from="$1"
+
+ case "$from" in
+ http://*|ftp://*) wget -O- -q "$from";;
+ *) cat "$from"
+ esac
+}
+
+get_magic_word() {
+ get_image "$1" | dd bs=2 count=1 2>/dev/null | hexdump | awk '$2 { print $2 }'
+}
+
+refresh_mtd_partitions() {
+ mtd refresh rootfs
+}
+
+jffs2_copy_config() {
+ if grep rootfs_data /proc/mtd >/dev/null; then
+ # squashfs+jffs2
+ mtd -e rootfs_data jffs2write "$CONF_TAR" rootfs_data
+ else
+ # jffs2
+ mtd jffs2write "$CONF_TAR" rootfs
+ fi
+}
+
+do_upgrade() {
+ v "Performing system upgrade..."
+ platform_do_upgrade "$ARGV"
+
+ [ "$SAVE_CONFIG" -eq 1 ] && {
+ v "Refreshing partitions"
+ if type 'platform_refresh_partitions' >/dev/null 2>/dev/null; then
+ platform_refresh_partitions
+ else
+ refresh_mtd_partitions
+ fi
+ if type 'platform_copy_config' >/dev/null 2>/dev/null; then
+ platform_copy_config
+ else
+ jffs2_copy_config
+ fi
+ }
+ ask_bool 1 "Reboot" && reboot
+}