spacepaste

Paste details

reply | raw

  1.  
  2. # cat init
  3. #!/bin/busybox sh
  5. export PATH=/sbin:/bin
  6. DEBUG=0
  8. rescue_shell() {
  9. echo "$@"
  10. echo "Something went wrong. Dropping you to a shell."
  11. busybox --install -s
  12. exec /bin/sh
  13. }
  15. # allow the use of UUIDs or filesystem lables
  16. uuidlabel_root() {
  17. for cmd in $(cat /proc/cmdline) ; do
  18. case ${cmd} in
  19. root=*)
  20. type=$(echo $cmd | cut -d= -f2)
  21. echo "Mounting rootfs"
  22. if [ ${type} == "LABEL" ] || [ ${type} == "UUID" ]; then
  23. uuid=$(echo $cmd | cut -d= -f3)
  24. mount -o ro $(findfs "${type}"="$uuid") /mnt/root
  25. else
  26. mount -o ro $(echo ${cmd} | cut -d= -f2) /mnt/root
  27. fi
  28. ;;
  29. esac
  30. done
  31. }
  33. check_filesystem() {
  34. # most of code coming from /etc/init.d/fsck
  36. local fsck_opts="" check_extra="" RC_UNAME=$(uname -s)
  37. local fs_type="$(grep $1 /mnt/root/etc/fstab | awk '{print 3}')" fsck_prefix=""
  39. # FIXME : get_bootparam forcefsck
  40. if [ -e /forcefsck ]; then
  41. fsck_opts="${fsck_opts} -f"
  42. check_extra="(check forced)"
  43. fi
  45. echo "Checking local filesystem $check_extra : $1"
  47. if [ "$RC_UNAME" = Linux ]; then
  48. case "${fs_type}" in
  49. reiserfs)
  50. fsck_opts="${fsck_opts} --check"
  51. fsck_prefix="echo Yes | "
  52. ;;
  53. ext4)
  54. fsck_opts="-p ${fsck_opts} -C0 -T"
  55. ;;
  56. *)
  57. rescue_shell "unknown fs type ${fs_type}"
  58. ;;
  59. esac
  60. fi
  62. trap : INT QUIT
  64. # using our own fsck, not the builtin one from busybox
  65. eval "${fsck_prefix}fsck.${fs_type} ${fsck_opts} $1"
  67. ret_val=$?
  70. case ${ret_val} in
  71. 0)
  72. return 0
  73. ;;
  74. 1)
  75. echo "Filesystem repaired";
  76. return 0
  77. ;;
  78. 2|3)
  79. if [ "${RC_UNAME}" = Linux ]; then
  80. echo "Filesystem repaired, but reboot needed"
  81. reboot -f
  82. else
  83. rescue_shell "Filesystem still have errors; manual fsck required"
  84. fi
  85. ;;
  86. 4)
  87. if [ "${RC_UNAME}" = Linux ]; then
  88. rescue_shell "Fileystem errors left uncorrected, aborting"
  89. else
  90. echo "Filesystem repaired, but reboot needed"
  91. reboot
  92. fi
  93. ;;
  94. 8)
  95. echo "Operational error"
  96. return 0
  97. ;;
  98. 16)
  99. echo "Use or Syntax Error"
  100. return 16
  101. ;;
  102. 32)
  103. echo "fsck interrupted"
  104. ;;
  105. 127)
  106. echo "Shared Library Error"
  107. sleep 20
  108. return 0
  109. ;;
  110. *)
  111. echo ${ret_val}
  112. echo "Some random fsck error - continuing anyway"
  113. sleep 20
  114. return 0
  115. ;;
  116. esac
  118. # rescue_shell can't find tty so its broken
  119. rescue_shell
  120. }
  122. create_labels() {
  123. mkdir -p /dev/disk/by-label
  124. while read partition; do
  125. DEV="$(echo ${partition} | awk '{print $4}')"
  126. DEV_PATH="/dev/${DEV}"
  127. if [ -z "${DEV}" -o ! -e "${DEV_PATH}" ]; then
  128. continue
  129. fi
  130. LABEL=$(busybox blkid ${DEV_PATH} | tr ' ' '\n' | grep "LABEL=" | cut -d= -f2 | sed 's/"//g')
  131. if [ ! -z "${LABEL}" ]; then
  132. ln -s ${DEV_PATH} /dev/disk/by-label/${LABEL}
  133. fi
  134. done < "/proc/partitions"
  135. }
  136. # start for real here
  138. # temporarily mount proc and sys
  139. mount -t proc none /proc
  140. mount -t sysfs none /sys
  141. mount -t devtmpfs none /dev
  143. CMDLINE="$(cat /proc/cmdline)"
  145. for param in ${CMDLINE}; do
  146. case "${param}" in
  147. rescue)
  148. echo "Rescue boot mode: invoking ash."
  149. rescue_shell "Rescue mode, dropping to shell"
  150. DEBUG=1
  151. ;;
  152. debug)
  153. DEBUG=1
  154. ;;
  155. esac
  156. done
  158. if [ ${DEBUG} -ne 0 ]; then
  159. # disable kernel messages from popping onto the screen
  160. echo 0 > /proc/sys/kernel/printk
  161. # clear the screen
  162. clear
  163. fi
  165. # assemble the raid set(s) - they got renumbered from md0, md1 and md2
  166. mdadm --assemble --scan
  168. #scan for raid inner partitions
  169. mdadm --detail --scan
  171. create_labels
  173. # mounting rootfs on /mnt/root
  174. uuidlabel_root || rescue_shell "Error with uuidlabel_root"
  176. # space separated list of mountpoints that ...
  177. mountpoints="/usr /var"
  179. # ... we want to find in /etc/fstab ...
  180. ln -s /mnt/root/etc/fstab /etc/fstab
  182. # ... to check filesystems and mount our devices.
  183. for m in ${mountpoints}; do
  184. check_filesystem ${m}
  186. echo "Mounting ${m}"
  187. # mount the device and ...
  188. mount ${m} || rescue_shell "Error while mounting ${m}"
  190. # ... move the tree to its final location
  191. mount --move ${m} "/mnt/root"${m} || rescue_shell "Error while moving $m"
  192. done
  194. echo "All done. Switching to real root."
  196. if [ ${DEBUG} -ne 0 ]; then
  197. echo 1 > /proc/sys/kernel/printk
  198. fi
  199. rm -rf /dev/disk/by-label
  201. # clean up. The init process will remount proc sys and dev later
  202. umount /proc
  203. umount /sys
  204. umount /dev
  206. # switch to the real root and execute init
  207. exec switch_root /mnt/root /sbin/init
  209. # cat initramfs_list
  210. # directory structure
  211. dir /proc 755 0 0
  212. dir /usr 755 0 0
  213. dir /bin 755 0 0
  214. dir /sys 755 0 0
  215. dir /var 755 0 0
  216. dir /lib64 755 0 0
  217. dir /sbin 755 0 0
  218. dir /mnt 755 0 0
  219. dir /mnt/root 755 0 0
  220. dir /etc 755 0 0
  221. dir /root 700 0 0
  222. dir /dev 755 0 0
  224. # busybox
  225. file /bin/busybox /usr/src/initramfs/bin/busybox 755 0 0
  227. # fsck bins
  228. file /sbin/fsck.reiserfs /sbin/fsck.reiserfs 755 0 0
  229. file /sbin/fsck.ext4 /sbin/fsck.ext4 755 0 0
  231. # mdadm
  232. file /sbin/mdadm /usr/src/initramfs/bin/mdadm 755 0 0
  233. file /etc/mdadm.conf /etc/mdadm.conf 755 0 0
  235. slink /lib /lib64 777 0 0
  236. file /lib64/ld-linux-x86-64.so.2 /lib64/ld-linux-x86-64.so.2 755 0 0
  237. file /lib64/libuuid.so.1 /lib64/libuuid.so.1 755 0 0
  238. file /lib64/libc.so.6 /lib64/libc.so.6 755 0 0
  239. file /lib/libext2fs.so.2 /lib/libext2fs.so.2 755 0 0
  240. file /lib/libcom_err.so.2 /lib/libcom_err.so.2 755 0 0
  241. file /lib/libpthread.so.0 /lib/libpthread.so.0 755 0 0
  242. file /lib/libblkid.so.1 /lib/libblkid.so.1 755 0 0
  243. file /lib/libe2p.so.2 /lib/libe2p.so.2 755 0 0
  245. # our init script
  246. file /init /usr/src/initramfs/init 755 0 0
  247.  
Powered by spacepaste. Paste removal.