package/base-files/files/sbin/sysupgrade

   1 #!/bin/sh
   2
   3 . /lib/functions.sh
   4 . /lib/functions/system.sh
   5 . /usr/share/libubox/jshn.sh
   6
   7 # initialize defaults
   8 export MTD_ARGS=""
   9 export MTD_CONFIG_ARGS=""
  10 export INTERACTIVE=0
  11 export VERBOSE=1
  12 export SAVE_CONFIG=1
  13 export SAVE_OVERLAY=0
  14 export SAVE_OVERLAY_PATH=
  15 export SAVE_PARTITIONS=1
  16 export SAVE_INSTALLED_PKGS=0
  17 export SKIP_UNCHANGED=0
  18 export CONF_IMAGE=
  19 export CONF_BACKUP_LIST=0
  20 export CONF_BACKUP=
  21 export CONF_RESTORE=
  22 export NEED_IMAGE=
  23 export HELP=0
  24 export FORCE=0
  25 export TEST=0
  26 export UMOUNT_ETCBACKUP_DIR=0
  27
  28 # parse options
  29 while [ -n "$1" ]; do
  30         case "$1" in
  31                 -i) export INTERACTIVE=1;;
  32                 -v) export VERBOSE="$(($VERBOSE + 1))";;
  33                 -q) export VERBOSE="$(($VERBOSE - 1))";;
  34                 -n) export SAVE_CONFIG=0;;
  35                 -c) export SAVE_OVERLAY=1 SAVE_OVERLAY_PATH=/etc;;
  36                 -o) export SAVE_OVERLAY=1 SAVE_OVERLAY_PATH=/;;
  37                 -p) export SAVE_PARTITIONS=0;;
  38                 -k) export SAVE_INSTALLED_PKGS=1;;
  39                 -u) export SKIP_UNCHANGED=1;;
  40                 -b|--create-backup) export CONF_BACKUP="$2" NEED_IMAGE=1; shift;;
  41                 -r|--restore-backup) export CONF_RESTORE="$2" NEED_IMAGE=1; shift;;
  42                 -l|--list-backup) export CONF_BACKUP_LIST=1;;
  43                 -f) export CONF_IMAGE="$2"; shift;;
  44                 -F|--force) export FORCE=1;;
  45                 -T|--test) export TEST=1;;
  46                 -h|--help) export HELP=1; break;;
  47                 -*)
  48                         echo "Invalid option: $1" >&2
  49                         exit 1
  50                 ;;
  51                 *) break;;
  52         esac
  53         shift;
  54 done
  55
  56 export CONFFILES=/tmp/sysupgrade.conffiles
  57 export CONF_TAR=/tmp/sysupgrade.tgz
  58 export ETCBACKUP_DIR=/etc/backup
  59 export INSTALLED_PACKAGES=${ETCBACKUP_DIR}/installed_packages.txt
  60
  61 IMAGE="$1"
  62
  63 [ -z "$IMAGE" -a -z "$NEED_IMAGE" -a $CONF_BACKUP_LIST -eq 0 -o $HELP -gt 0 ] && {
  64         cat <<EOF
  65 Usage: $0 [<upgrade-option>...] <image file or URL>
  66        $0 [-q] [-i] [-c] [-u] [-o] [-k] <backup-command> <file>
  67
  68 upgrade-option:
  69         -f <config>  restore configuration from .tar.gz (file or url)
  70         -i           interactive mode
  71         -c           attempt to preserve all changed files in /etc/
  72         -o           attempt to preserve all changed files in /, except those
  73                      from packages but including changed confs.
  74         -u           skip from backup files that are equal to those in /rom
  75         -n           do not save configuration over reflash
  76         -p           do not attempt to restore the partition table after flash.
  77         -k           include in backup a list of current installed packages at
  78                      $INSTALLED_PACKAGES
  79         -T | --test
  80                      Verify image and config .tar.gz but do not actually flash.
  81         -F | --force
  82                      Flash image even if image checks fail, this is dangerous!
  83         -q           less verbose
  84         -v           more verbose
  85         -h | --help  display this help
  86
  87 backup-command:
  88         -b | --create-backup <file>
  89                      create .tar.gz of files specified in sysupgrade.conf
  90                      then exit. Does not flash an image. If file is '-',
  91                      i.e. stdout, verbosity is set to 0 (i.e. quiet).
  92         -r | --restore-backup <file>
  93                      restore a .tar.gz created with sysupgrade -b
  94                      then exit. Does not flash an image. If file is '-',
  95                      the archive is read from stdin.
  96         -l | --list-backup
  97                      list the files that would be backed up when calling
  98                      sysupgrade -b. Does not create a backup file.
  99
 100 EOF
 101         exit 1
 102 }
 103
 104 [ -n "$IMAGE" -a -n "$NEED_IMAGE" ] && {
 105         cat <<-EOF
 106                 -b|--create-backup and -r|--restore-backup do not perform a firmware upgrade.
 107                 Do not specify both -b|-r and a firmware image.
 108         EOF
 109         exit 1
 110 }
 111
 112 # prevent messages from clobbering the tarball when using stdout
 113 [ "$CONF_BACKUP" = "-" ] && export VERBOSE=0
 114
 115
 116 list_conffiles() {
 117         awk '
 118                 BEGIN { conffiles = 0 }
 119                 /^Conffiles:/ { conffiles = 1; next }
 120                 !/^ / { conffiles = 0; next }
 121                 conffiles == 1 { print }
 122         ' /usr/lib/opkg/status
 123 }
 124
 125 list_changed_conffiles() {
 126         # Cannot handle spaces in filenames - but opkg cannot either...
 127         list_conffiles | while read file csum; do
 128                 [ -r "$file" ] || continue
 129
 130                 echo "${csum}  ${file}" | sha256sum -sc - || echo "$file"
 131         done
 132 }
 133
 134 add_conffiles() {
 135         local file="$1"
 136         ( find $(sed -ne '/^[[:space:]]*$/d; /^#/d; p' \
 137                 /etc/sysupgrade.conf /lib/upgrade/keep.d/* 2>/dev/null) \
 138                 \( -type f -o -type l \) $find_filter 2>/dev/null;
 139           list_changed_conffiles ) | sort -u > "$file"
 140         return 0
 141 }
 142
 143 add_overlayfiles() {
 144         local file="$1"
 145
 146         local packagesfiles=$1.packagesfiles
 147         touch "$packagesfiles"
 148
 149         if [ "$SAVE_OVERLAY_PATH" = / ]; then
 150                 local conffiles=$1.conffiles
 151                 local keepfiles=$1.keepfiles
 152
 153                 list_conffiles | cut -f2 -d ' ' | sort -u > "$conffiles"
 154
 155                 # backup files from /etc/sysupgrade.conf and /lib/upgrade/keep.d, but
 156                 # ignore those aready controlled by opkg conffiles
 157                 find $(sed -ne '/^[[:space:]]*$/d; /^#/d; p' \
 158                         /etc/sysupgrade.conf /lib/upgrade/keep.d/* 2>/dev/null) \
 159                         \( -type f -o -type l \) 2>/dev/null | sort -u |
 160                         grep -h -v -x -F -f $conffiles > "$keepfiles"
 161
 162                 # backup conffiles, but only those changed if '-u'
 163                 [ $SKIP_UNCHANGED = 1 ] &&
 164                         list_changed_conffiles | sort -u > "$conffiles"
 165
 166                 # do not backup files from packages, except those listed
 167                 # in conffiles and keep.d
 168                 {
 169                         find /usr/lib/opkg/info -type f -name "*.list" -exec cat {} \;
 170                         find /usr/lib/opkg/info -type f -name "*.control" -exec sed \
 171                                 -ne '/^Alternatives/{s/^Alternatives: //;s/, /\n/g;p}' {} \; |
 172                                 cut -f2 -d:
 173                 } |  grep -v -x -F -f $conffiles |
 174                      grep -v -x -F -f $keepfiles | sort -u > "$packagesfiles"
 175                 rm -f "$keepfiles" "$conffiles"
 176         fi
 177
 178         # busybox grep bug when file is empty
 179         [ -s "$packagesfiles" ] || echo > $packagesfiles
 180
 181         ( cd /overlay/upper/; find .$SAVE_OVERLAY_PATH \( -type f -o -type l \) $find_filter | sed \
 182                 -e 's,^\.,,' \
 183                 -e '\,^/etc/board.json$,d' \
 184                 -e '\,/[^/]*-opkg$,d' \
 185                 -e '\,^/etc/urandom.seed$,d' \
 186                 -e "\,^$INSTALLED_PACKAGES$,d" \
 187                 -e '\,^/usr/lib/opkg/.*,d' \
 188         ) | grep -v -x -F -f $packagesfiles > "$file"
 189
 190         rm -f "$packagesfiles"
 191
 192         return 0
 193 }
 194
 195 if [ $SAVE_OVERLAY = 1 ]; then
 196         [ ! -d /overlay/upper/etc ] && {
 197                 echo "Cannot find '/overlay/upper/etc', required for '-c'" >&2
 198                 exit 1
 199         }
 200         sysupgrade_init_conffiles="add_overlayfiles"
 201 else
 202         sysupgrade_init_conffiles="add_conffiles"
 203 fi
 204
 205 find_filter=""
 206 if [ $SKIP_UNCHANGED = 1 ]; then
 207         [ ! -d /rom/ ] && {
 208                 echo "'/rom/' is required by '-u'"
 209                 exit 1
 210         }
 211         find_filter='( ( -exec test -e /rom/{} ; -exec cmp -s /{} /rom/{} ; ) -o -print )'
 212 fi
 213
 214 include /lib/upgrade
 215
 216 do_save_conffiles() {
 217         local conf_tar="$1"
 218
 219         [ -z "$(rootfs_type)" ] && {
 220                 echo "Cannot save config while running from ramdisk." >&2
 221                 ask_bool 0 "Abort" && exit
 222                 rm -f "$conf_tar"
 223                 return 0
 224         }
 225         run_hooks "$CONFFILES" $sysupgrade_init_conffiles
 226         ask_bool 0 "Edit config file list" && vi "$CONFFILES"
 227
 228         if [ "$SAVE_INSTALLED_PKGS" -eq 1 ]; then
 229                 echo "${INSTALLED_PACKAGES}" >> "$CONFFILES"
 230                 mkdir -p "$ETCBACKUP_DIR"
 231                 # Avoid touching filesystem on each backup
 232                 RAMFS="$(mktemp -d -t sysupgrade.XXXXXX)"
 233                 mkdir -p "$RAMFS/upper" "$RAMFS/work"
 234                 mount -t overlay overlay -o lowerdir=$ETCBACKUP_DIR,upperdir=$RAMFS/upper,workdir=$RAMFS/work $ETCBACKUP_DIR &&
 235                         UMOUNT_ETCBACKUP_DIR=1 || {
 236                                 echo "Cannot mount '$ETCBACKUP_DIR' as tmpfs to avoid touching disk while saving the list of installed packages." >&2
 237                                 ask_bool 0 "Abort" && exit
 238                         }
 239
 240                 # Format: pkg-name<TAB>{rom,overlay,unkown}
 241                 # rom is used for pkgs in /rom, even if updated later
 242                 find /usr/lib/opkg/info -name "*.control" \( \
 243                         \( -exec test -f /rom/{} \; -exec echo {} rom \; \) -o \
 244                         \( -exec test -f /overlay/upper/{} \; -exec echo {} overlay \; \) -o \
 245                         \( -exec echo {} unknown \; \) \
 246                         \) | sed -e 's,.*/,,;s/\.control /\t/' > ${INSTALLED_PACKAGES}
 247         fi
 248
 249         v "Saving config files..."
 250         [ "$VERBOSE" -gt 1 ] && TAR_V="v" || TAR_V=""
 251         tar c${TAR_V}zf "$conf_tar" -T "$CONFFILES" 2>/dev/null
 252         if [ "$?" -ne 0 ]; then
 253                 echo "Failed to create the configuration backup."
 254                 rm -f "$conf_tar"
 255                 exit 1
 256         fi
 257
 258         [ "$UMOUNT_ETCBACKUP_DIR" -eq 1 ] && {
 259                 umount "$ETCBACKUP_DIR"
 260                 rm -rf "$RAMFS"
 261         }
 262         rm -f "$CONFFILES"
 263 }
 264
 265 if [ $CONF_BACKUP_LIST -eq 1 ]; then
 266         run_hooks "$CONFFILES" $sysupgrade_init_conffiles
 267         [ "$SAVE_INSTALLED_PKGS" -eq 1 ] && echo ${INSTALLED_PACKAGES} >> "$CONFFILES"
 268         cat "$CONFFILES"
 269         rm -f "$CONFFILES"
 270         exit 0
 271 fi
 272
 273 if [ -n "$CONF_BACKUP" ]; then
 274         do_save_conffiles "$CONF_BACKUP"
 275         exit $?
 276 fi
 277
 278 if [ -n "$CONF_RESTORE" ]; then
 279         if [ "$CONF_RESTORE" != "-" ] && [ ! -f "$CONF_RESTORE" ]; then
 280                 echo "Backup archive '$CONF_RESTORE' not found." >&2
 281                 exit 1
 282         fi
 283
 284         [ "$VERBOSE" -gt 1 ] && TAR_V="v" || TAR_V=""
 285         tar -C / -x${TAR_V}zf "$CONF_RESTORE"
 286         exit $?
 287 fi
 288
 289 type platform_check_image >/dev/null 2>/dev/null || {
 290         echo "Firmware upgrade is not implemented for this platform." >&2
 291         exit 1
 292 }
 293
 294 case "$IMAGE" in
 295         http://*|\
 296         https://*)
 297                 wget -O/tmp/sysupgrade.img "$IMAGE"
 298                 IMAGE=/tmp/sysupgrade.img
 299                 ;;
 300 esac
 301
 302 IMAGE="$(readlink -f "$IMAGE")"
 303
 304 case "$IMAGE" in
 305         '')
 306                 echo "Image file not found." >&2
 307                 exit 1
 308                 ;;
 309         /tmp/*) ;;
 310         *)
 311                 v "Image not in /tmp, copying..."
 312                 cp -f "$IMAGE" /tmp/sysupgrade.img
 313                 IMAGE=/tmp/sysupgrade.img
 314                 ;;
 315 esac
 316
 317 json_load "$(/usr/libexec/validate_firmware_image "$IMAGE")" || {
 318         echo "Failed to check image"
 319         exit 1
 320 }
 321 json_get_var valid "valid"
 322 [ "$valid" -eq 0 ] && {
 323         if [ $FORCE -eq 1 ]; then
 324                 echo "Image check failed but --force given - will update anyway!" >&2
 325         else
 326                 echo "Image check failed." >&2
 327                 exit 1
 328         fi
 329 }
 330
 331 if [ -n "$CONF_IMAGE" ]; then
 332         case "$(get_magic_word $CONF_IMAGE cat)" in
 333                 # .gz files
 334                 1f8b) ;;
 335                 *)
 336                         echo "Invalid config file. Please use only .tar.gz files" >&2
 337                         exit 1
 338                 ;;
 339         esac
 340         get_image "$CONF_IMAGE" "cat" > "$CONF_TAR"
 341         export SAVE_CONFIG=1
 342 elif ask_bool $SAVE_CONFIG "Keep config files over reflash"; then
 343         [ $TEST -eq 1 ] || do_save_conffiles "$CONF_TAR"
 344         export SAVE_CONFIG=1
 345 else
 346         [ $TEST -eq 1 ] || rm -f "$CONF_TAR"
 347         export SAVE_CONFIG=0
 348 fi
 349
 350 if [ $TEST -eq 1 ]; then
 351         exit 0
 352 fi
 353
 354 install_bin /sbin/upgraded
 355 v "Commencing upgrade. Closing all shell sessions."
 356
 357 COMMAND='/lib/upgrade/do_stage2'
 358
 359 if [ -n "$FAILSAFE" ]; then
 360         printf '%s\x00%s\x00%s' "$RAM_ROOT" "$IMAGE" "$COMMAND" >/tmp/sysupgrade
 361         lock -u /tmp/.failsafe
 362 else
 363         force_attr=""
 364         [ $FORCE -eq 1 ] && force_attr="\"force\": true,"
 365         ubus call system sysupgrade "{
 366                 \"prefix\": $(json_string "$RAM_ROOT"),
 367                 \"path\": $(json_string "$IMAGE"),
 368                 $force_attr
 369                 \"command\": $(json_string "$COMMAND"),
 370                 \"options\": {
 371                         \"save_config\": $SAVE_CONFIG,
 372                         \"save_partitions\": $SAVE_PARTITIONS
 373                 }
 374         }"
 375 fi