rescue: Pass $TERM from library into the virt-rescue appliance.

[libguestfs.git] / appliance / init

diff --git a/appliance/init b/appliance/init
index b33a34c..f399916 100755 (executable)
--- a/appliance/init
+++ b/appliance/init
@@ -2,15 +2,25 @@
 
 echo Starting /init script ...
 
-PATH=/sbin:/usr/sbin:$PATH
+PATH=/sbin:/usr/sbin:/bin:/usr/bin
+export PATH
 
 mount -t proc /proc /proc
 mount -t sysfs /sys /sys
 
 if [ -x /etc/init.d/udev ]; then
-  /etc/init.d/udev start
-elif [ -x /sbin/start_udev ]; then
-  /sbin/start_udev
+  if type service >/dev/null 2>&1; then
+     service udev start
+  else
+     /etc/init.d/udev start
+  fi
+elif [ -x /sbin/start_udev ] && /sbin/start_udev; then
+  :
+elif [ -x /sbin/udevd ]; then
+  echo -e '\000\000\000\000' > /proc/sys/kernel/hotplug
+  /sbin/udevd --daemon
+  /sbin/udevadm trigger
+  /sbin/udevadm settle --timeout=10
 else
   echo No udev, creating /dev manually
   mount -t tmpfs none /dev
@@ -33,6 +43,10 @@ else
   modprobe virtio_net
 fi
 
+if grep -sq selinux=1 /proc/cmdline; then
+  mount -t selinuxfs none /selinux
+fi
+
 modprobe dm_mod ||:
 
 ifconfig lo 127.0.0.1
@@ -42,6 +56,9 @@ route add default gw 10.0.2.2
 lvm vgscan --ignorelockingfailure
 lvm vgchange -ay --ignorelockingfailure
 
+# Improve virtio-blk performance (RHBZ#509383).
+for f in /sys/block/vd*/queue/rotational; do echo 1 > $f; done
+
 # Keep these to enhance the usefulness of debug output.
 ls -l /dev
 cat /proc/mounts
@@ -54,10 +71,30 @@ lsmod
 #ping -n -v -c 5 10.0.2.2
 #ping -n -v -c 5 10.0.2.4
 
-# Improve virtio-blk performance (RHBZ#509383).
-for f in /sys/block/vd*/queue/rotational; do echo 1 > $f; done
+echo -n "uptime: "; cat /proc/uptime
 
-if grep -sq guestfs_rescue=1 /proc/cmdline; then
-  bash -i
+if ! grep -sq guestfs_rescue=1 /proc/cmdline; then
+  exec guestfsd -f
 fi
-exec guestfsd -f
+
+# Use appliance in rescue mode, also used by the virt-rescue command.
+eval $(grep -Eo 'TERM=[^[:space:]]+' /proc/cmdline)
+PS1='><rescue> '
+export TERM PS1
+echo
+echo "------------------------------------------------------------"
+echo
+echo "Welcome to virt-rescue, the libguestfs rescue shell."
+echo
+echo "Note: The contents of / are the rescue appliance."
+echo "You have to mount the guest's partitions under /sysroot"
+echo "before you can examine them."
+echo
+bash -i
+echo
+echo "virt-rescue: Syncing the disk now before exiting ..."
+echo "(Don't worry if you see a 'Kernel panic' message below)"
+echo
+sync
+sleep 1
+sync