diff options
Diffstat (limited to 'defaults/linuxrc')
| -rw-r--r-- | defaults/linuxrc | 73 |
1 files changed, 51 insertions, 22 deletions
diff --git a/defaults/linuxrc b/defaults/linuxrc index 8356aea..ebed7d8 100644 --- a/defaults/linuxrc +++ b/defaults/linuxrc @@ -289,6 +289,24 @@ do fi unset tmp_disabled ;; + gk.emergency=*) + tmp_action=${x#*=} + case "${tmp_action}" in + reboot) + GK_EMERGENCY_ACTION="reboot -f" + ;; + poweroff) + GK_EMERGENCY_ACTION="poweroff -f" + ;; + halt) + GK_EMERGENCY_ACTION="halt -f" + ;; + *) + warn_msg "'${x}' is an unsupported emergency action -- ignored!" + ;; + esac + unset tmp_action + ;; gk.hw.load-all=*) tmp_disabled=${x#*=} if is_true "${tmp_disabled}" @@ -1341,28 +1359,39 @@ fi # init_opts is set in the environment by the kernel when it parses the command line init=${REAL_INIT:-/sbin/init} -if ! mountpoint "${CHROOT}" 1>/dev/null 2>&1 -then - bad_msg "${CHROOT} was not a mountpoint" -elif chroot "${CHROOT}" test ! -x /${init#/} -then - bad_msg "init=${init} does not exist in the rootfs!" -elif [ $$ != 1 ] -then - bad_msg "PID was not 1! switch_root would fail" -else - good_msg "Switching to real root: switch_root ${CHROOT} ${init} ${init_opts}" - exec switch_root "${CHROOT}" "${init}" ${init_opts} -fi -# If we get here, something bad has happened -splash 'verbose' +while true +do + # switch_root can only be called from PID 1; + # So stay in loop as long as user is able + # to fix the problem. -bad_msg "A fatal error has occured since ${init} did not" -bad_msg "boot correctly. Trying to open a shell ..." + if ! mountpoint "${CHROOT}" 1>/dev/null 2>&1 + then + bad_msg "${CHROOT} is not a mountpoint; Was root device (${REAL_ROOT}) not mounted?" + elif ! chroot "${CHROOT}" test -x /${init#/} 1>/dev/null 2>&1 + then + mounted_root_device=$(mountpoint -n /newroot 2>/dev/null | awk '{ print $1 }') + bad_msg "init (${init}) not found in mounted root device (${mounted_root_device})!" + else + break + fi + + run_emergency_shell + if ! is_userinteraction_allowed + then + ${GK_EMERGENCY_ACTION} || exit 1 + fi +done -exec /bin/bash -exec /bin/sh -exec /bin/ash -exec /bin/dash -exec sh +good_msg "Switching to real root: switch_root ${CHROOT} ${init} ${init_opts}" +exec switch_root "${CHROOT}" "${init}" ${init_opts} + +# If we reached here, something went very badly wrong in the initramfs. +# However, spawning a rescue shell at this point would not help anymore: +# 1) We have to assume that switch_root has already messed with +# initramfs (i.e. we probably have no /dev anymore). +# 2) Any shell we would spawn would become child of PID 1 which would +# prevent user from calling switch_root once the user believes the +# problem was fixed. +${GK_EMERGENCY_ACTION} || exit 1 |