package/base-files/files/lib/upgrade/common.sh

   1 #!/bin/sh
   2
   3 RAM_ROOT=/tmp/root
   4
   5 [ -x /usr/bin/ldd ] || ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
   6 libs() { ldd $* 2>/dev/null | sed -r 's/(.* => )?(.*) .*/\2/'; }
   7
   8 install_file() { # <file> [ <file> ... ]
   9         for file in "$@"; do
  10                 dest="$RAM_ROOT/$file"
  11                 [ -f $file -a ! -f $dest ] && {
  12                         dir="$(dirname $dest)"
  13                         mkdir -p "$dir"
  14                         cp $file $dest
  15                 }
  16         done
  17 }
  18
  19 install_bin() { # <file> [ <symlink> ... ]
  20         src=$1
  21         files=$1
  22         [ -x "$src" ] && files="$src $(libs $src)"
  23         install_file $files
  24         shift
  25         for link in "$@"; do {
  26                 dest="$RAM_ROOT/$link"
  27                 dir="$(dirname $dest)"
  28                 mkdir -p "$dir"
  29                 [ -f "$dest" ] || ln -s $src $dest
  30         }; done
  31 }
  32
  33 supivot() { # <new_root> <old_root>
  34         /bin/mount | grep "on $1 type" 2>&- 1>&- || /bin/mount -o bind $1 $1
  35         mkdir -p $1$2 $1/proc $1/sys $1/dev $1/tmp $1/overlay && \
  36         /bin/mount -o noatime,move /proc $1/proc && \
  37         pivot_root $1 $1$2 || {
  38                 /bin/umount -l $1 $1
  39                 return 1
  40         }
  41
  42         /bin/mount -o noatime,move $2/sys /sys
  43         /bin/mount -o noatime,move $2/dev /dev
  44         /bin/mount -o noatime,move $2/tmp /tmp
  45         /bin/mount -o noatime,move $2/overlay /overlay 2>&-
  46         return 0
  47 }
  48
  49 run_ramfs() { # <command> [...]
  50         install_bin /bin/busybox /bin/ash /bin/sh /bin/mount /bin/umount        \
  51                 /sbin/pivot_root /sbin/reboot /bin/sync /bin/dd /bin/grep       \
  52                 /bin/cp /bin/mv /bin/tar /usr/bin/md5sum "/usr/bin/[" /bin/dd   \
  53                 /bin/vi /bin/ls /bin/cat /usr/bin/awk /usr/bin/hexdump          \
  54                 /bin/sleep /bin/zcat /usr/bin/bzcat /usr/bin/printf /usr/bin/wc \
  55                 /bin/cut /usr/bin/printf /bin/sync /bin/mkdir /bin/rmdir        \
  56                 /bin/rm /usr/bin/basename /bin/kill /bin/chmod
  57
  58         install_bin /bin/uclient-fetch /bin/wget
  59         install_bin /sbin/mtd
  60         install_bin /sbin/mount_root
  61         install_bin /sbin/snapshot
  62         install_bin /sbin/snapshot_tool
  63         install_bin /usr/sbin/ubiupdatevol
  64         install_bin /usr/sbin/ubiattach
  65         install_bin /usr/sbin/ubiblock
  66         install_bin /usr/sbin/ubiformat
  67         install_bin /usr/sbin/ubidetach
  68         install_bin /usr/sbin/ubirsvol
  69         install_bin /usr/sbin/ubirmvol
  70         install_bin /usr/sbin/ubimkvol
  71         install_bin /usr/sbin/partx
  72         for file in $RAMFS_COPY_BIN; do
  73                 install_bin ${file//:/ }
  74         done
  75         install_file /etc/resolv.conf /lib/*.sh /lib/functions/*.sh /lib/upgrade/*.sh $RAMFS_COPY_DATA
  76
  77         [ -L "/lib64" ] && ln -s /lib $RAM_ROOT/lib64
  78
  79         supivot $RAM_ROOT /mnt || {
  80                 echo "Failed to switch over to ramfs. Please reboot."
  81                 exit 1
  82         }
  83
  84         /bin/mount -o remount,ro /mnt
  85         /bin/umount -l /mnt
  86
  87         grep /overlay /proc/mounts > /dev/null && {
  88                 /bin/mount -o noatime,remount,ro /overlay
  89                 /bin/umount -l /overlay
  90         }
  91
  92         # spawn a new shell from ramdisk to reduce the probability of cache issues
  93         exec /bin/busybox ash -c "$*"
  94 }
  95
  96 kill_remaining() { # [ <signal> ]
  97         local sig="${1:-TERM}"
  98         echo -n "Sending $sig to remaining processes ... "
  99
 100         local my_pid=$$
 101         local my_ppid=$(cut -d' ' -f4  /proc/$my_pid/stat)
 102         local my_ppisupgraded=
 103         grep -q upgraded /proc/$my_ppid/cmdline >/dev/null && {
 104                 local my_ppisupgraded=1
 105         }
 106
 107         local stat
 108         for stat in /proc/[0-9]*/stat; do
 109                 [ -f "$stat" ] || continue
 110
 111                 local pid name state ppid rest
 112                 read pid name state ppid rest < $stat
 113                 name="${name#(}"; name="${name%)}"
 114
 115                 local cmdline
 116                 read cmdline < /proc/$pid/cmdline
 117
 118                 # Skip kernel threads
 119                 [ -n "$cmdline" ] || continue
 120
 121                 if [ $$ -eq 1 ] || [ $my_ppid -eq 1 ] && [ -n "$my_ppisupgraded" ]; then
 122                         # Running as init process, kill everything except me
 123                         if [ $pid -ne $$ ] && [ $pid -ne $my_ppid ]; then
 124                                 echo -n "$name "
 125                                 kill -$sig $pid 2>/dev/null
 126                         fi
 127                 else
 128                         case "$name" in
 129                                 # Skip essential services
 130                                 *procd*|*ash*|*init*|*watchdog*|*ssh*|*dropbear*|*telnet*|*login*|*hostapd*|*wpa_supplicant*|*nas*) : ;;
 131
 132                                 # Killable process
 133                                 *)
 134                                         if [ $pid -ne $$ ] && [ $ppid -ne $$ ]; then
 135                                                 echo -n "$name "
 136                                                 kill -$sig $pid 2>/dev/null
 137                                         fi
 138                                 ;;
 139                         esac
 140                 fi
 141         done
 142         echo ""
 143 }
 144
 145 run_hooks() {
 146         local arg="$1"; shift
 147         for func in "$@"; do
 148                 eval "$func $arg"
 149         done
 150 }
 151
 152 ask_bool() {
 153         local default="$1"; shift;
 154         local answer="$default"
 155
 156         [ "$INTERACTIVE" -eq 1 ] && {
 157                 case "$default" in
 158                         0) echo -n "$* (y/N): ";;
 159                         *) echo -n "$* (Y/n): ";;
 160                 esac
 161                 read answer
 162                 case "$answer" in
 163                         y*) answer=1;;
 164                         n*) answer=0;;
 165                         *) answer="$default";;
 166                 esac
 167         }
 168         [ "$answer" -gt 0 ]
 169 }
 170
 171 v() {
 172         [ "$VERBOSE" -ge 1 ] && echo "$@"
 173 }
 174
 175 rootfs_type() {
 176         /bin/mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
 177 }
 178
 179 get_image() { # <source> [ <command> ]
 180         local from="$1"
 181         local conc="$2"
 182         local cmd
 183
 184         case "$from" in
 185                 http://*|ftp://*) cmd="wget -O- -q";;
 186                 *) cmd="cat";;
 187         esac
 188         if [ -z "$conc" ]; then
 189                 local magic="$(eval $cmd \"$from\" 2>/dev/null | dd bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
 190                 case "$magic" in
 191                         1f8b) conc="zcat";;
 192                         425a) conc="bzcat";;
 193                 esac
 194         fi
 195
 196         eval "$cmd \"$from\" 2>/dev/null ${conc:+| $conc}"
 197 }
 198
 199 get_magic_word() {
 200         (get_image "$@" | dd bs=2 count=1 | hexdump -v -n 2 -e '1/1 "%02x"') 2>/dev/null
 201 }
 202
 203 get_magic_long() {
 204         (get_image "$@" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
 205 }
 206
 207 jffs2_copy_config() {
 208         if grep rootfs_data /proc/mtd >/dev/null; then
 209                 # squashfs+jffs2
 210                 mtd -e rootfs_data jffs2write "$CONF_TAR" rootfs_data
 211         else
 212                 # jffs2
 213                 mtd jffs2write "$CONF_TAR" rootfs
 214         fi
 215 }
 216
 217 # Flash firmware to MTD partition
 218 #
 219 # $(1): path to image
 220 # $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
 221 default_do_upgrade() {
 222         sync
 223         if [ "$SAVE_CONFIG" -eq 1 ]; then
 224                 get_image "$1" "$2" | mtd $MTD_CONFIG_ARGS -j "$CONF_TAR" write - "${PART_NAME:-image}"
 225         else
 226                 get_image "$1" "$2" | mtd write - "${PART_NAME:-image}"
 227         fi
 228 }
 229
 230 do_upgrade() {
 231         v "Performing system upgrade..."
 232         if type 'platform_do_upgrade' >/dev/null 2>/dev/null; then
 233                 platform_do_upgrade "$ARGV"
 234         else
 235                 default_do_upgrade "$ARGV"
 236         fi
 237
 238         if [ "$SAVE_CONFIG" -eq 1 ] && type 'platform_copy_config' >/dev/null 2>/dev/null; then
 239                 platform_copy_config
 240         fi
 241
 242         v "Upgrade completed"
 243         [ -n "$DELAY" ] && sleep "$DELAY"
 244         ask_bool 1 "Reboot" && {
 245                 v "Rebooting system..."
 246                 reboot -f
 247                 sleep 5
 248                 echo b 2>/dev/null >/proc/sysrq-trigger
 249         }
 250 }