scripts/boot/mountroot.sh

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