152 lines
3.0 KiB
Bash
152 lines
3.0 KiB
Bash
#!/bin/sh
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RAM_ROOT=/tmp/root
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ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
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libs() { ldd $* | awk '{print $3}'; }
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install_file() { # <file> [ <file> ... ]
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for file in "$@"; do
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dest="$RAM_ROOT/$file"
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[ -f $file -a ! -f $dest ] && {
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dir="$(dirname $dest)"
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mkdir -p "$dir"
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cp $file $dest
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}
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done
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}
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install_bin() { # <file> [ <symlink> ... ]
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src=$1
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files=$1
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[ -x "$src" ] && files="$src $(libs $src)"
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install_file $files
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shift
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for link in "$@"; do {
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dest="$RAM_ROOT/$link"
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dir="$(dirname $dest)"
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mkdir -p "$dir"
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[ -f "$dest" ] || ln -s $src $dest
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}; done
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}
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pivot() { # <new_root> <old_root>
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mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
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mkdir -p $1$2 $1/proc $1/dev $1/tmp $1/jffs && \
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mount -o move /proc $1/proc && \
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pivot_root $1 $1$2 || {
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umount $1 $1
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return 1
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}
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mount -o move $2/dev /dev
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mount -o move $2/tmp /tmp
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mount -o move $2/jffs /jffs 2>&-
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return 0
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}
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run_ramfs() { # <command> [...]
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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
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install_bin /sbin/mtd
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for file in $RAMFS_COPY_BIN; do
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install_bin $file
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done
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install_file /etc/resolv.conf /etc/functions.sh /lib/upgrade/*.sh $RAMFS_COPY_DATA
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pivot $RAM_ROOT /mnt || {
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echo "Failed to switch over to ramfs. Please reboot."
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exit 1
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}
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mount -o remount,ro /mnt
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umount -l /mnt
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grep /jffs /proc/mounts > /dev/null && {
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mount -o remount,ro /jffs
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umount -l /jffs
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}
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# spawn a new shell from ramdisk to reduce the probability of cache issues
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exec /bin/busybox ash -c "$*"
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}
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run_hooks() {
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local arg="$1"; shift
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for func in "$@"; do
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eval "$func $arg"
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done
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}
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ask_bool() {
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local default="$1"; shift;
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local answer="$default"
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[ "$INTERACTIVE" -eq 1 ] && {
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case "$default" in
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0) echo -n "$* (y/N): ";;
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*) echo -n "$* (Y/n): ";;
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esac
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read answer
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case "$answer" in
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y*) answer=1;;
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n*) answer=0;;
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*) answer="$default";;
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esac
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}
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[ "$answer" -gt 0 ]
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}
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v() {
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[ "$VERBOSE" -ge 1 ] && echo "$@"
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}
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rootfs_type() {
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mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
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}
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get_image() {
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local from="$1"
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case "$from" in
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http://*|ftp://*) wget -O- -q "$from";;
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*) cat "$from"
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esac
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}
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get_magic_word() {
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get_image "$1" | dd bs=2 count=1 2>/dev/null | hexdump -C | awk '$2 { print $2 $3 }'
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}
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refresh_mtd_partitions() {
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mtd refresh rootfs
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}
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jffs2_copy_config() {
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if grep rootfs_data /proc/mtd >/dev/null; then
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# squashfs+jffs2
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mtd -e rootfs_data jffs2write "$CONF_TAR" rootfs_data
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else
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# jffs2
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mtd jffs2write "$CONF_TAR" rootfs
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fi
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}
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do_upgrade() {
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v "Performing system upgrade..."
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platform_do_upgrade "$ARGV"
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[ "$SAVE_CONFIG" -eq 1 ] && {
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v "Refreshing partitions"
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if type 'platform_refresh_partitions' >/dev/null 2>/dev/null; then
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platform_refresh_partitions
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else
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refresh_mtd_partitions
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fi
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if type 'platform_copy_config' >/dev/null 2>/dev/null; then
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platform_copy_config
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else
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jffs2_copy_config
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fi
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}
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ask_bool 1 "Reboot" && reboot
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}
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