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  2. #!/bin/busybox sh
  4. rescue_shell() {
  5. echo "$@"
  6. echo "Something went wrong. Dropping you to a shell."
  7. /bin/busybox --install -s
  8. exec /bin/sh
  9. }
  11. # allow the use of UUIDs or filesystem lables
  12. uuidlabel_root() {
  13. for cmd in $(/bin/cat /proc/cmdline) ; do
  14. case $cmd in
  15. root=*)
  16. type=$(echo $cmd | /bin/cut -d= -f2)
  17. echo "Mounting rootfs"
  18. if [ $type == "LABEL" ] || [ $type == "UUID" ] ; then
  19. uuid=$(echo $cmd | /bin/cut -d= -f3)
  20. /bin/mount -o ro $(findfs "$type"="$uuid") /mnt/root
  21. else
  22. /bin/mount -o ro $(echo $cmd | cut -d= -f2) /mnt/root
  23. fi
  24. ;;
  25. esac
  26. done
  27. }
  29. check_filesystem() {
  30. # most of code coming from /etc/init.d/fsck
  32. local fsck_opts= check_extra= RC_UNAME=$(uname -s)
  34. # FIXME : get_bootparam forcefsck
  35. if [ -e /forcefsck ]; then
  36. fsck_opts="$fsck_opts -f"
  37. check_extra="(check forced)"
  38. fi
  40. echo "Checking local filesystem $check_extra : $1"
  42. if [ "$RC_UNAME" = Linux ]; then
  43. fsck_opts="$fsck_opts -C0 -T"
  44. fi
  46. trap : INT QUIT
  48. # using our own fsck, not the builtin one from busybox
  49. /sbin/fsck -p $fsck_opts $1
  51. ret_val=$?
  52. case $ret_val in
  53. 0) return 0;;
  54. 1) echo "Filesystem repaired"; return 0;;
  55. 2|3) if [ "$RC_UNAME" = Linux ]; then
  56. echo "Filesystem repaired, but reboot needed"
  57. reboot -f
  58. else
  59. rescue_shell "Filesystem still have errors; manual fsck required"
  60. fi;;
  61. 4) if [ "$RC_UNAME" = Linux ]; then
  62. rescue_shell "Fileystem errors left uncorrected, aborting"
  63. else
  64. echo "Filesystem repaired, but reboot needed"
  65. reboot
  66. fi;;
  67. 8) echo "Operational error"; return 0;;
  68. 16) echo "Use or Syntax Error"; return 16;;
  69. 32) echo "fsck interrupted";;
  70. 127) echo "Shared Library Error"; sleep 20; return 0;;
  71. *) echo $ret_val; echo "Some random fsck error - continuing anyway"; sleep 20; return 0;;
  72. esac
  74. # rescue_shell can't find tty so its broken
  75. rescue_shell
  76. }
  79. # start for real here
  81. # temporarily mount proc and sys
  82. /bin/mount -t proc none /proc
  83. /bin/mount -t sysfs none /sys
  84. /bin/mount -t devtmpfs none /dev
  85. /bin/mount -t devpts -o rw,nosuid,noexec,relatime,gid=5,mode=620 devpts /dev/pts
  87. # disable kernel messages from popping onto the screen
  88. ###echo 0 > /proc/sys/kernel/printk
  89. # clear the screen
  90. ###clear
  93. # LVM for everything
  94. # lvm runs as whatever its called as
  95. #ln -s /sbin/lvm.static /sbin/vgchange
  97. # start the vg volume group - /home and everything for portage - need not die here
  98. /sbin/vgchange -ay vg || rescue_shell "vgchange failed"
  100. # get here with logical volumes available
  102. # mounting rootfs on /mnt/root
  103. uuidlabel_root || rescue_shell "Error with uuidlabel_root"
  105. # space separated list of mountpoints that ...
  106. # mountpoints="/usr /var"
  108. # ... we want to find in /etc/fstab ...
  109. #ln -s /mnt/root/etc/fstab /etc/fstab
  111. # ... to check filesystems and mount our devices.
  112. #for m in $mountpoints ; do
  114. #echo $m
  116. # check_filesystem $m
  118. # echo "Mounting $m"
  119. # # mount the device and ...
  120. # mount $m || rescue_shell "Error while mounting $m"
  122. # # ... move the tree to its final location
  123. # mount --move $m "/mnt/root"$m || rescue_shell "Error while moving $m"
  124. #done
  126. echo "All done. Switching to real root."
  128. # clean up. The init process will remount proc sys and dev later
  129. /bin/umount /proc
  130. /bin/umount /sys
  131. /bin/umount /dev/pts
  132. /bin/umount /dev
  134. # switch to the real root and execute init
  135. exec /sbin/switch_root /mnt/root /sbin/init
  136.  
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