scripts/boot/mountroot.sh

   1 #!/bin/sh
   2
   3 # set -e
   4
   5 mountroot ()
   6 {
   7         if [ -x /scripts/local-top/cryptroot ]; then
   8             /scripts/local-top/cryptroot
   9         fi
  10
  11         exec 6>&1
  12         exec 7>&2
  13         exec > boot.log
  14         exec 2>&1
  15         tail -f boot.log >&7 &
  16         tailpid="${!}"
  17
  18         . /live.vars
  19
  20         _CMDLINE="$(cat /proc/cmdline)"
  21         Cmdline
  22
  23         case "${LIVE_DEBUG}" in
  24                 true)
  25                         set -x
  26                         ;;
  27         esac
  28
  29         case "${LIVE_READ_ONLY}" in
  30                 true)
  31                         Read_only
  32                         ;;
  33         esac
  34
  35         Select_eth_device
  36
  37         # Needed here too because some things (*cough* udev *cough*)
  38         # changes the timeout
  39
  40         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ] || [ ! -z "${HTTPFS}" ] || [ ! -z "${FTPFS}" ]
  41         then
  42                 if do_netmount
  43                 then
  44                         livefs_root="${mountpoint}"
  45                 else
  46                         panic "Unable to find a live file system on the network"
  47                 fi
  48         else
  49                 if [ -n "${ISCSI_PORTAL}" ]
  50                 then
  51                         do_iscsi && livefs_root="${mountpoint}"
  52                 elif [ -n "${PLAIN_ROOT}" ] && [ -n "${ROOT}" ]
  53                 then
  54                         # Do a local boot from hd
  55                         livefs_root=${ROOT}
  56                 else
  57                         if [ -x /usr/bin/memdiskfind ]
  58                         then
  59                                 MEMDISK=$(/usr/bin/memdiskfind)
  60
  61                                 if [ $? -eq 0 ]
  62                                 then
  63                                         # We found a memdisk, set up phram
  64                                         modprobe phram phram=memdisk,${MEMDISK}
  65
  66                                         # Load mtdblock, the memdisk will be /dev/mtdblock0
  67                                         modprobe mtdblock
  68                                 fi
  69                         fi
  70
  71                         # Scan local devices for the image
  72                         i=0
  73                         while [ "$i" -lt 60 ]
  74                         do
  75                                 livefs_root=$(find_livefs ${i})
  76
  77                                 if [ -n "${livefs_root}" ]
  78                                 then
  79                                         break
  80                                 fi
  81
  82                                 sleep 1
  83                                 i="$(($i + 1))"
  84                         done
  85                 fi
  86         fi
  87
  88         if [ -z "${livefs_root}" ]
  89         then
  90                 panic "Unable to find a medium containing a live file system"
  91         fi
  92
  93         case "${LIVE_VERIFY_CHECKSUMS}" in
  94                 true)
  95                         Verify_checksums "${livefs_root}"
  96                         ;;
  97         esac
  98
  99         if [ "${TORAM}" ]
 100         then
 101                 live_dest="ram"
 102         elif [ "${TODISK}" ]
 103         then
 104                 live_dest="${TODISK}"
 105         fi
 106
 107         if [ "${live_dest}" ]
 108         then
 109                 log_begin_msg "Copying live media to ${live_dest}"
 110                 copy_live_to "${livefs_root}" "${live_dest}"
 111                 log_end_msg
 112         fi
 113
 114         # if we do not unmount the ISO we can't run "fsck /dev/ice" later on
 115         # because the mountpoint is left behind in /proc/mounts, so let's get
 116         # rid of it when running from RAM
 117         if [ -n "$FROMISO" ] && [ "${TORAM}" ]
 118         then
 119                 losetup -d /dev/loop0
 120
 121                 if is_mountpoint /live/fromiso
 122                 then
 123                         umount /live/fromiso
 124                         rmdir --ignore-fail-on-non-empty /live/fromiso \
 125                                 >/dev/null 2>&1 || true
 126                 fi
 127         fi
 128
 129         if [ -n "${MODULETORAMFILE}" ] || [ -n "${PLAIN_ROOT}" ]
 130         then
 131                 setup_unionfs "${livefs_root}" "${rootmnt}"
 132         else
 133                 mac="$(get_mac)"
 134                 mac="$(echo ${mac} | sed 's/-//g')"
 135                 mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
 136         fi
 137
 138
 139         if [ -n "${ROOT_PID}" ] ; then
 140                 echo "${ROOT_PID}" > "${rootmnt}"/live/root.pid
 141         fi
 142
 143         log_end_msg
 144
 145         # unionfs-fuse needs /dev to be bind-mounted for the duration of
 146         # live-bottom; udev's init script will take care of things after that
 147         if [ "${UNIONTYPE}" = unionfs-fuse ]
 148         then
 149                 mount -n -o bind /dev "${rootmnt}/dev"
 150         fi
 151
 152         # Move to the new root filesystem so that programs there can get at it.
 153         if [ ! -d /root/live/image ]
 154         then
 155                 mkdir -p /root/live/image
 156                 mount --move /live/image /root/live/image
 157         fi
 158
 159         # aufs2 in kernel versions around 2.6.33 has a regression:
 160         # directories can't be accessed when read for the first the time,
 161         # causing a failure for example when accessing /var/lib/fai
 162         # when booting FAI, this simple workaround solves it
 163         ls /root/* >/dev/null 2>&1
 164
 165         # Move findiso directory to the new root filesystem so that programs there can get at it.
 166         if [ -d /live/findiso ] && [ ! -d /root/live/findiso ]
 167         then
 168                 mkdir -p /root/live/findiso
 169                 mount -n --move /live/findiso /root/live/findiso
 170         fi
 171
 172         # if we do not unmount the ISO we can't run "fsck /dev/ice" later on
 173         # because the mountpoint is left behind in /proc/mounts, so let's get
 174         # rid of it when running from RAM
 175         if [ -n "$FINDISO" ] && [ "${TORAM}" ]
 176         then
 177                 losetup -d /dev/loop0
 178
 179                 if is_mountpoint /root/live/findiso
 180                 then
 181                         umount /root/live/findiso
 182                         rmdir --ignore-fail-on-non-empty /root/live/findiso \
 183                                 >/dev/null 2>&1 || true
 184                 fi
 185         fi
 186
 187         # copy snapshot configuration if exists
 188         if [ -f snapshot.conf ]
 189         then
 190                 log_begin_msg "Copying snapshot.conf to ${rootmnt}/etc/live/boot.d"
 191                 if [ ! -d "${rootmnt}/etc/live/boot.d" ]
 192                 then
 193                         mkdir -p "${rootmnt}/etc/live/boot.d"
 194                 fi
 195                 cp snapshot.conf "${rootmnt}/etc/live/boot.d/"
 196                 log_end_msg
 197         fi
 198
 199         if [ -f /etc/resolv.conf ] && [ ! -s ${rootmnt}/etc/resolv.conf ]
 200         then
 201                 log_begin_msg "Copying /etc/resolv.conf to ${rootmnt}/etc/resolv.conf"
 202                 cp -v /etc/resolv.conf ${rootmnt}/etc/resolv.conf
 203                 log_end_msg
 204         fi
 205
 206         if ! [ -d "/lib/live/boot" ]
 207         then
 208                 panic "A wrong rootfs was mounted."
 209         fi
 210
 211         persistence_exclude
 212         fstab
 213         Netbase
 214
 215         case "${LIVE_SWAPON}" in
 216                 true)
 217                         Swapon
 218                         ;;
 219         esac
 220
 221         if [ "${UNIONFS}" = unionfs-fuse ]
 222         then
 223                 umount "${rootmnt}/dev"
 224         fi
 225
 226         exec 1>&6 6>&-
 227         exec 2>&7 7>&-
 228         kill ${tailpid}
 229         [ -w "${rootmnt}/var/log/" ] && mkdir -p /var/log/live && cp boot.log "${rootmnt}/var/log/live" 2>/dev/null
 230 }